US20060290518A1 - Safety system for a compartment of a vehicle - Google Patents
Safety system for a compartment of a vehicle Download PDFInfo
- Publication number
- US20060290518A1 US20060290518A1 US11/510,978 US51097806A US2006290518A1 US 20060290518 A1 US20060290518 A1 US 20060290518A1 US 51097806 A US51097806 A US 51097806A US 2006290518 A1 US2006290518 A1 US 2006290518A1
- Authority
- US
- United States
- Prior art keywords
- vehicle
- trunk
- sensor
- compartment
- safety system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B83/00—Vehicle locks specially adapted for particular types of wing or vehicle
- E05B83/16—Locks for luggage compartments, car boot lids or car bonnets
- E05B83/26—Emergency opening means for persons trapped in the luggage compartment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
- B60Q3/30—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for compartments other than passenger or driving compartments, e.g. luggage or engine compartments
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B79/00—Mounting or connecting vehicle locks or parts thereof
- E05B79/10—Connections between movable lock parts
- E05B79/20—Connections between movable lock parts using flexible connections, e.g. Bowden cables
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B81/00—Power-actuated vehicle locks
- E05B81/54—Electrical circuits
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B81/00—Power-actuated vehicle locks
- E05B81/54—Electrical circuits
- E05B81/64—Monitoring or sensing, e.g. by using switches or sensors
- E05B81/76—Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles
- E05B81/77—Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles comprising sensors detecting the presence of the hand of a user
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B85/00—Details of vehicle locks not provided for in groups E05B77/00 - E05B83/00
- E05B85/10—Handles
- E05B85/12—Inner door handles
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/22—Status alarms responsive to presence or absence of persons
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/18—Prevention or correction of operating errors
- G08B29/183—Single detectors using dual technologies
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/10—Illuminating devices on or for locks or keys; Transparent or translucent lock parts; Indicator lights
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00896—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S292/00—Closure fasteners
- Y10S292/43—Rear deck lid latches
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S292/00—Closure fasteners
- Y10S292/65—Emergency or safety
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Mechanical Engineering (AREA)
- Computer Security & Cryptography (AREA)
- Lock And Its Accessories (AREA)
Abstract
A safety system for a compartment of a vehicle includes an occupant sensor for sensing an occupant within the compartment of the vehicle, a vehicle-based control, and a wireless transmitter of the vehicle. The control is responsive to the occupant sensor. The control controls transmission by the wireless transmitter. The wireless transmitter may transmit to a receiver located external of the vehicle upon detection by the occupant sensor of the presence of an occupant within the compartment of the vehicle.
Description
- The present application is a continuation of U.S. patent application, Ser. No. 10/930,195, filed Aug. 31, 2004 (Attorney Docket DON01 P-1168), which is a continuation of U.S. patent application, Ser. No. 10/301,315, filed Nov. 21, 2002, now U.S. Pat. No. 6,783,167 (Attorney Docket DON01 P-1028), which is a continuation of U.S. patent application, Ser. No. 09/648,560, filed Aug. 25, 2000, now U.S. Pat. No. 6,485,081 (Attorney Docket DON01 P-807), which is a continuation-in-part of U.S. patent application, Ser. No. 09/516,831, filed Mar. 1, 2000, now U.S. Pat. No. 6,390,529 (Attorney Docket DON01 P-796), and is a continuation-in-part of U.S. patent application, Ser. No. 09/484,754, filed Jan. 18, 2000, now U.S. Pat. No. 6,480,103, and is a continuation-in-part of U.S. patent application, Ser. No. 09/605,233, filed Jun. 28, 2000, now U.S. Pat. No. 6,254,261 (Attorney Docket DON01 P-824), which is a continuation of U.S. patent application, Ser. No. 09/275,565, filed Mar. 24, 1999, now U.S. Pat. No. 6,086,131 (Attorney Docket DON01 P-729), which are hereby incorporated by reference herein in their entireties.
- This invention relates generally to a mechanism for opening a door to a compartment and, more particularly, to a mechanism for opening a deck lid of a vehicle from inside the space enclosed by the deck lid. This invention further relates to a sensing system to sense conditions in a compartment and to generate a response. More particularly, this invention pertains to a system that senses conditions within a vehicle compartment, such as the presence of a human or other animal, and also senses other vehicle conditions. The system responds to the sensed conditions in a predetermined manner. The response includes, for example, actuating an indicator and/or controlling a latching mechanism.
- Typically, the deck lid or door to a trunk space is opened by a key being inserted and turned in a lock cylinder from a position exteriorly of the deck lid or by a button or lever that is positioned within the passenger compartment of the vehicle. While it has been suggested that a handle be placed in the interior of the trunk space, because of numerous difficulties, to date, vehicle manufacturers have not included a device specifically for opening the trunk from the inside of the trunk space. Even fold down rear seats, which are common in many vehicles today, cannot be folded down from within the trunk space. Although placement of a release mechanism in the trunk space has been suggested in the prior art, no commercially acceptable mechanism or device has been developed. Therefore, if a person is within the trunk space when the deck lid is closed, there is no way for a person to open the deck lid and get out of the trunk.
- When the deck lid is closed, the space within the trunk is typically small and very dark. Although a light source is typically provided in a trunk to provide light to the trunk space when the trunk space is open, these lights are deactivated when the trunk is closed, in order to prevent excessive drain on the battery of the vehicle. Therefore, when a person is trapped within a trunk, it is nearly impossible to see anything within the trunk, such that even if a release mechanism were operable within the trunk, a person would not be able to find the mechanism after the deck lid had been closed. Furthermore, due to the cramped and tight space within a trunk, a person's movements to reach and operate a release mechanism are extremely restricted.
- This inability to open a trunk of a vehicle from inside the trunk space has unfortunately led to many injuries and even deaths over the years. When the deck lid is closed, the interior space of the trunk may reach extreme temperatures during the summer time, such that a person can only survive therein for a short period of time. Typically, these injuries and deaths occur to children, who enter the trunk to either play or hide and then trap themselves within the trunk by closing the deck lid.
- Because a person trapped within the trunk of the vehicle may be a small child, the person's abilities to respond to a release mechanism within the trunk may be limited. Even if a handle, button or the like is visible to a child, the child may be too afraid to even attempt to use the device or may be too weak to activate the release mechanism. Because there is no way to detect the child within the trunk, the child may remain trapped therein until the trunk is opened from the outside.
- Vehicle sensing systems typically utilize sensors to detect occupants in the passenger compartment of a vehicle. These systems utilize the sensed information for airbag deployment and/or intrusion alert. Conventional sensing-alert systems do not address the problem of preventing humans and/or pets from being trapped in a vehicle such as, for example, a vehicle cargo compartment (trunk). Automobiles are particularly dangerous as there are multiple means of entry into the trunk, for example, fold-down rear seats, remote keyless entry modules, and push-buttons or pull levers under the dashboard or beside the seat or otherwise located in the vehicle compartment that when actuated release the trunk. Typically there is no means of exit from the trunk once inside. In particular, automobile trunks present a potential safety hazard to humans and pets because the latching mechanism may close while they are in the trunk. This is particularly true for young children who may accidentally become trapped in the trunk of a car and suffer serious physical injury and/or emotional distress because they are unable to escape and there is no means for notifying someone that they are trapped.
- Therefore, there is a need in the art for an interior trunk release mechanism which is highly visible under minimal lighting conditions such as when the deck lid of the trunk is closed. Furthermore, the release mechanism should be easily recognizable and operable even by children, and should avoid damage or deterioration of existing vehicle systems, such as the battery or electrical system, while remaining operable even when the vehicle is shut off. In the event that an occupant in the trunk may be a small child, the release mechanism preferably should be operable to automatically detect the presence of a person within the trunk and to automatically assist the person in opening the trunk in response to such detection. Furthermore, there is a need for a system that can sense when a person is in the vehicle passenger compartment or trunk compartment and generate a response to facilitate their release.
- The present invention is intended to provide a mechanical apparatus for activating a release mechanism for a deck lid of a trunk of a vehicle from within the interior space of the trunk.
- According to a first aspect of the present invention, a release system is adapted for use in opening a deck lid of a vehicle and is positionable within a compartment substantially enclosed by the deck lid. The release system comprises an electrically operable actuating device which is connectable to the release mechanism and at least one of a manual input device and an occupant detector, said actuating device being operable to at least partially actuate the release mechanism to open the deck lid in response to a user input to said manual input device or a detection of an occupant within the compartment by said occupant detector. Preferably, the release system comprises a self contained release module which is connectable to the release mechanism of the deck lid and electrically connected to a power source, such as a vehicle battery or the like.
- Preferably, the occupant detector comprises a temperature sensor and/or motion sensor and determines the presence of a person or animal within the trunk in response to detection of motion or a predetermined temperature. Preferably, the manual input device comprises a handle and may further comprise a handle sensor at the handle which is operable to detect movement of the handle and/or touching of the handle. The handle may comprise a bright color and be in contrast to a dark background upon which it is installed. Preferably, the color is selected to convey a safe and friendly image to a child, such as a yellow or bright green color.
- The assist device is operable to ease manual operation of the handle as the handle is moved to activate the release mechanism. The assist device may also be operable independent of any manual movement of the handle, while the handle may be operable independent of the assist device, in case power is disconnected from the assist device. Preferably, the assist device comprises an electrically operated solenoid, a gas operable piston, or a compressed spring which is connected to the handle or to a lever or extension connected to the handle.
- In one form, the release system may further comprise an illumination source. Preferably, the illumination source comprises a self-luminous light, such as a Tritium gas capsule, and/or may comprise a non-incandescent light, such as a light emitting diode or any other illumination source. The illumination source is operable to provide either direct or indirect illumination to the handle of the present invention. The illumination source may be temporarily activated upon closure of the deck lid and may be further activated upon an activating event, such as movement of the handle or detection of a person or animal within the trunk space by the occupant detector.
- In another form, the release system includes a control, which is operable to activate the actuating device in response to said manual input device and/or said occupant detector. The control may be further operable to activate and deactivate the illumination source in response to one or more activating events, and may provide an audio signal to an occupant in response to detection of the occupant.
- According to another aspect of the present invention, the release system includes a handle, a release assist device, an occupant detection system, an illumination source and a control circuit. The handle is interconnected to a release mechanism of the compartment and at least partially provides a mechanical advantage such that the release mechanism may be activated upon exertion of less than 20 Newtons in a predetermined direction on the handle. The illumination source provides illumination to the handle and is activated by the control circuit upon an occurrence of an activating event.
- According to yet another aspect of the present invention, a release system is adapted for use in opening a compartment of a vehicle and is positionable within the compartment and substantially enclosed by a lid. The lid is openable by an electrically controlled latch. The release system is adapted to activate the latch in response to an activation of the release system.
- In one form, the release system includes an electro-mechanical device which activates the latch when at least a portion of the device is moved. Preferably, the electro-mechanical device is a button and the activation is a pressing of the button.
- In another form, a release system adapted for use in opening a deck lid of a vehicle is provided, the release system being positionable within a vehicle compartment (such as a trunk compartment) that is at least partially closed by the deck lid, the compartment having a release mechanism for opening the deck lid. The release system is adapted for operation from the interior of the compartment and includes an assist device. The assist device is connectable to the release mechanism and comprises at least one of an electrically operable actuating device, a mechanically operable actuating device and a gas operable actuating device. The release system includes at least one of a manual input device and an occupant detector. The assist device is operable to actuate the release mechanism to open the deck lid in response to either or both of a user input to the manual input device or a detection of an occupant within the compartment by the occupant detector. In one embodiment, the assist device comprises a solenoid. In another embodiment, the assist device comprises a gas operable actuating device, such as a piston in communication with a compressed gas source, which is connectable to the release mechanism. In yet another embodiment, the assist device comprises a mechanically operable actuating device such as a compressed spring member.
- This invention further relates to a system for detecting humans and animals that may be trapped in a compartment, such as the trunk of a vehicle. Accordingly, another embodiment is directed to an apparatus for controlling the status of a compartment of a vehicle. This apparatus includes a first sensor, which is disposed in the compartment and generates an alert signal responsive to sensed conditions in the compartment. A controller is coupled to the sensor and receives the alert signal. In response to the received alert signal, the controller generates a control signal in accordance with the received alert signal. A mechanism is coupled to the controller and disposed in the compartment. The mechanism receives the control signal from the controller and enters an open position when actuated by the control signal.
- Another embodiment is directed to an apparatus for controlling a light source in a compartment. This apparatus includes a latching mechanism that is mounted on the compartment. The latching mechanism generates a mechanism signal indicative of latching mechanism position. A sensor, typically a pyroelectric sensor, is mounted on a surface of the compartment and senses thermal changes by sensing changes in radiant flux. When the sensor senses a change in the flux and a change in heat, the sensor generates an alert signal. The light source is mounted on a surface of the compartment for emitting light energy when actuated. A controller is coupled to the latching mechanism, the sensor and the light source, for receiving the alert signal from the sensor and the mechanism signal from the latching mechanism. The controller generates a control signal as a function of the alert signal and the mechanism signal. The control signal actuates the light source when the alert signal is received and the mechanism signal indicates the compartment is closed.
- Yet another embodiment is directed to a method for controlling the status of a compartment latch of a vehicle. This method includes the steps of sensing conditions in the compartment at predetermined time intervals. An alert signal indicative of the sensed conditions is generated. Then a motion signal indicative of vehicle motion is generated. The alert signal and the motion signal are transmitted to a controller and a control signal is generated in accordance with the alert signal and the motion signal. The compartment latch is actuated in response to the control signal.
- Yet another embodiment is directed to a vehicle cargo compartment control system for controlling an actuatable latch disposed on a cargo compartment of a vehicle. The vehicle is capable of generating a motion signal indicative of a state of vehicle motion. A sensor is disposed in the cargo compartment, and senses the presence of an occupant in the cargo compartment. The sensor generates a sensor signal when an occupant is sensed. A controller, which is coupled to the sensor and the actuatable latch of the cargo compartment, receives the sensor signal and the motion signal. The controller determines whether the sensor signal exceeds a predetermined threshold. The controller actuates the latch of the cargo compartment when the sensor signal exceeds the predetermined threshold and the motion signal indicates the vehicle is in a stationary state.
- Yet another embodiment is directed to a latch release system for actuating a trunk latch of a vehicle. The vehicle is capable of generating a vehicle motion signal indicative of vehicle motion. The vehicle has a passenger compartment and a trunk compartment. The latch release system comprises a sensor, mounted in the interior of the trunk compartment, that senses thermal energy in the trunk compartment and generates an output signal indicating a sensed quantity of thermal energy in the trunk compartment. An indicator, mounted in the passenger compartment of the vehicle, is capable of illumination. A controller, mounted on the vehicle and coupled to the sensor and the indicator, receives the output signal from the sensor and compares the magnitude and quantity of the output signals received from the sensor to a predetermined magnitude and a predetermined time period to establish an alarm condition. The controller also receives the vehicle motion signal from the vehicle indicative of vehicle motion. The controller actuates the trunk latch when an alarm condition has been established and the vehicle motion signal indicates the vehicle is in a stationary state. The controller illuminates the indicator when an alarm condition has been established and the vehicle motion signal indicates the vehicle is in a non-stationary state.
- Yet another embodiment is directed to a latch release system for selectively conditioning the opening of a normally closed trunk compartment lid of a movable vehicle. The vehicle is capable of generating a vehicle motion signal indicative of vehicle motion and has an indicator mounted on a passenger compartment of the vehicle. The trunk compartment lid has latched and unlatched states and is latched into its latched state by a selectively releasable latching mechanism disposed on the trunk compartment lid. The system comprises a sensing circuit mounted on the vehicle for sensing the presence of an occupant within the trunk compartment. The sensing circuit produces an output signal in response to sensing an occupant. A control circuit is coupled to the sensing circuit, the indicator, and the latching mechanism. The control circuit receives the output signal from the sensing circuit and receives the vehicle motion signal, and responsive to the output signal illuminates the indicator when the vehicle motion signal indicates the vehicle is moving. The control circuit conditions the latching mechanism to unlock the trunk compartment when the vehicle motion signal indicates that the vehicle is stationary.
- Yet another embodiment is directed to a sensor system for sensing an occupant in a vehicle compartment comprising a primary sensor, mounted in the compartment, for sensing the presence of a living being such as a human in the compartment. The primary sensor is adapted to generate an output signal upon receiving adequate input. A controller is coupled to the primary sensor, for receiving the output signal from the primary sensor and generating a control signal based on the output signal. The control signal is transmitted to one or more destinations.
- Yet another embodiment is directed to a system for sensing an occupant in a vehicle compartment comprising a primary sensor. The primary sensor is mounted in the compartment and senses the presence of a living being such as a human in the compartment. The primary sensor is adapted to generate a primary output signal upon receiving adequate input. One or more secondary sensors are coupled to the primary sensor and activate upon receiving the primary output signal from the primary sensor. The secondary sensors generate a secondary output signal. A controller, coupled to the secondary sensor, receives the secondary output signal from the secondary sensor and generates a control signal based on the secondary output signal. The control signal is transmitted to one or more destinations. These destinations are, for example, an indicator light, a trunk latch mechanism, horn, headlights, interior lights, a pager and a remote keyless entry module.
- Therefore, the present invention provides a trunk release system which is easily recognizable and operable by a child, as children are the ones typically harmed by being trapped in a trunk. The release system is easy to activate and is preferably a bright friendly color so as not to frighten or confuse a child who may be trapped within the trunk. Preferably, the release system further comprises an automatic assist device which is operable to automatically assist a person to activate the trunk release in response to a detection of a person within the trunk and/or an attempt by the person to activate the release mechanism. Furthermore, an illumination source is preferably provided to increase the visibility of the release mechanism. The illumination source should only be activated for a limited period of time in order to prevent excessive drain on the battery of the vehicle. The present invention further provides for a system for sensing an occupant in the trunk or other vehicle compartment. The trunk may be automatically opened by the system in response to a detection of a person or animal within the compartment.
- These and other objects, advantages, purposes and features of this invention will become apparent upon review of the following specification in conjunction with the drawings.
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FIG. 1 is a perspective view of a deck lid of a vehicle incorporating the present invention; -
FIG. 2 is a front perspective view of the present invention prior to it being installed in the vehicle; -
FIG. 3 is a front elevation of the housing and handle of the present invention; -
FIG. 4 a is a cross-sectional view taken substantially along line IVa—IVa inFIG. 3 ; -
FIG. 4 b is an enlarged view of the area labeled IVb inFIG. 4 a; -
FIG. 5 is a rear elevation of the present invention; -
FIG. 6 is a block diagram of the control circuit of the present invention; and -
FIG. 7 is a block diagram of an active/passive trunk release module in accordance with the present invention; -
FIG. 8 shows a vehicle having a compartment sensing system; -
FIG. 9 is a flowchart showing activation of primary and secondary sensing devices; -
FIG. 10 shows a block diagram of the components of a compartment sensing system; -
FIG. 11 shows a block diagram of a PTRS module and associated components; -
FIG. 12 shows a second embodiment of the compartment sensing system; -
FIG. 13 shows a trunk release algorithm; -
FIG. 14 shows a light source control algorithm; -
FIG. 15 shows a perspective view of a detector module used with the instant invention; -
FIGS. 16A and 16B show perspective views of a lens used with the instant invention; -
FIG. 17 shows a lenslet array used with the instant invention; -
FIG. 18 shows an exploded view of a detector module used with the instant invention; -
FIG. 19 shows a third embodiment of the compartment sensing system; -
FIG. 20 shows a diagram of a detector module; -
FIGS. 21A and 21B show views of the detector module; -
FIG. 22 shows a detector module used with a lock-out module; -
FIG. 23 shows a block diagram of a detection system; - FIGS. 24(a)-(c) show a schematic diagram of the detection system; and
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FIG. 25 shows a detector device with an air bubble. - Referring now specifically to the drawings and the illustrative embodiments depicted therein, there is shown in
FIG. 1 a safety release apparatus orassembly 10, which includes ahandle 12 which is interconnected to arelease mechanism 14 for opening a deck lid ortrunk lid 16 of atrunk compartment 18 of avehicle 20. Thevehicle 20 may be a sedan, coupe or even a hatchback or the like, which includes astorage compartment 18 substantially enclosed by a lid ordoor 16, such as a trunk or the like. Handle 12 ofsafety release apparatus 10 is interconnected withrelease mechanism 14 ofdeck lid 16 such thatrelease mechanism 14 is activated, anddeck lid 16 is subsequently opened, in response to a movement ofhandle 12.Safety release mechanism 10 is mounted on aninterior surface 16 a of either thedeck lid 16 or elsewhere withintrunk space 18, so as to allow an operator ofsafety apparatus 10 to open the trunk from withintrunk space 18. Most preferably,safety mechanism 10 is mounted on a downward extending portion orwaterfall 16 b ofdeck lid 16, as shown inFIG. 1 . However, clearlysafety release apparatus 10 may be mounted elsewhere withintrunk space 18 ofvehicle 20, such as on a sidewall of the trunk space or the like, without affecting the scope of the present invention. - Handle 12 of the present invention is preferably injection molded from a resinous polymeric material such as polycarbonate/PBT or polycarbonate/ABS or the like and includes a
long handle portion 12 a and ashaft portion 12 b (FIGS. 4 b and 5), which provides for apivot axis 22 ofhandle 12. However, handle 12 may alternatively be a switch, push button or any other electromechanical device which may be electronically interconnected to an electronic latch mechanism, such that movement of at least a portion of the device releases the release mechanism in order to open the trunk. It is further envisioned that the handle may be any manual input device, such as a button, switch, touch surface or even a voice activated microphone system, such that the release mechanism is activated in response to a person's voice being detected withintrunk space 18, as discussed below. - Preferably, handle 12 is designed and formed so as to be easily recognizable as an opening device for a door or the like, and further is formed with rounded edges along the
handle portion 12 a so as to make it a comfortable handle for a child or other occupant within the trunk to grasp and operate.Handle 12 may further include text or a picture on a facingsurface 12 c to convey to an operator ofhandle 12 that handle 12 is for opening the trunk. Furthermore, the color ofhandle 12 is preferably selected to be a “friendly” color for children, so that any small child which may become trapped withintrunk space 18 will not fear the handle as being something that is hot or otherwise harmful to touch. Preferably, the color selected is a bright green or yellow, which has been shown to convey a bright yet “friendly” or cool to touch appearance to the handle. It is important that the handle be child friendly so that even the smallest and youngest children who may be trapped within the trunk will not be afraid to operate thehandle 12. - By providing a light color which does not convey an image of heat or otherwise harmful material, the
handle 12 of the present invention is more likely to be grasped and operated by small children than a handle which may otherwise be of a “harmful” color, such as red or orange, which a child may believe is hot to touch. In order to make handle 12 more visible in minimum lighting conditions, handle 12 is also preferably mounted adjacent to abackground 24 that is of a substantially darker color than handle 12, so as to provide a stark contrast between the handle and its background for better visibility of the handle in minimal lighting conditions. Thebackground 24 may be a surface of ahousing 28 forsafety release assembly 10 or may be an interior surface of thetrunk space 18 ordeck lid 16 itself. -
Safety release apparatus 10 preferably is installed within ahousing 28, which is secured withintrunk space 18 such that handle 12 is positioned within arecess 30 ofhousing 28.Housing 28 is preferably injection molded from a resinous polymeric material such as polycarbonate/PBT or polycarbonate/ABS or the like and may be black or another dark color.Housing 28 functions to protect handle 12 from being bumped or damaged by items which may be stored withintrunk space 18 ofvehicle 20. Not only does this prevent damage to handle 12 or other components ofsafety release apparatus 10, buthousing 28 also substantially precludes the possibility ofhandle 12 being accidentally contacted and moved by the stored items so as to prevent unintentional opening oftrunk space 18. - As best shown in
FIGS. 2-4 a,housing 28 includes a substantially flat and outward extendingflange 32 along its rearward end and a raised perimeter,front surface 33.Flange 32 allows for easy installation of the present invention, as fasteners or adhesive or the like may be inserted through or applied toflange 32 and then secured to an interior surface of eitherdeck lid 16 or other interior surface of thetrunk space 18 of thevehicle 20. Clearly, thesafety release mechanism 10 may be installed on a vehicle during the assembly of the vehicle by the manufacturer, or may be installed later as an after market unit, without affecting the scope of the present invention. -
Handle 12 is preferably positioned withinrecess 30 ofhousing 28 below or behind the plane offront surface 33 such that the handle may pivot about itsaxis 22 withinrecess 30.Perimeter surface 33 helps protecthandle 12 from stored items within trunk orcompartment 18, and helps prevent accidental activation ofhandle 12.Recess 30 may also include at least onestop 30 a, which limits rotational travel ofhandle 12 within a predetermined range. Preferably, as shown inFIGS. 4 a and 4 b, handle 12 includes a cylindrical bearing orbarrel section 35 which has longitudinally extendingsections 35 a separated by slots which are generally parallel to thepivot axis 22 ofhandle 12. The slots allow thelongitudinal sections 35 a to flex inward asshaft 12 b is inserted into opening 28 a inhousing 28.Barrel section 35 may also include a plurality of resilient, angled flange ortabs 35 b formed at afree end 35 c oflongitudinal sections 35 a and extending radially outwardly therefrom.Tabs 35 b each have an inclined outer edge orsurface 35 d and a substantially flat,planar edge 35 e extending generally perpendicular toaxis 22 whenhandle 12 is mounted in opening 28 a. Asshaft 12 b is inserted into opening 28 a, theinclined surfaces 35 d oftabs 35 b engage theopening 28 a and cam thesections 35 a inwardly and guide insertion ofbarrel section 35 through opening 28 a. Astabs 35 b protrude through opening 28 a,flat edges 35 e engage aninterior surface 28 e ofhousing 28adjacent opening 28 a so as to snapfit handle 12 intohousing 28. This allows handle 12 to be easily rotated within opening 28 a, yet substantially precludes handle 12 from being pulled outward from opening 28 a. - Additionally, a biasing
member 34, such as a torsional spring or the like (FIG. 5 ), may be provided aboutshaft 12 b ofhandle 12 in order to biashandle 12 in an initial position. Biasingmember 34 preferably is positioned around alower end 37 ofhandle shaft 12 b, such that oneend 34 a of biasingmember 34 engages astop tab 34 b onhousing 28 and anotherend 34 c engages aslot 37 a alonglower portion 37 ofshaft 12 b. This substantially fixes both ends 34 a and 34 c of biasingmember 34 so that rotational movement ofhandle 12 aboutaxis 22 winds the torsional spring, which then provides a rotational force onshaft 12 b to returnhandle 12 to its initial position. - Preferably, handle 12 is interconnected to release
mechanism 14 by alever 36 and acable 38, as best shown inFIGS. 4 a and 5. Thelever 36 is attached tolower portion 37 ofshaft 12 b, which extends downward from handle 12 a throughbarrel section 35 and is of a lesser diameter thanbarrel section 35.Lower portion 37 is substantially non-circular at its free end and includesslot 37 a extending longitudinally along itsaxis 22.Slot 37 a allowslower portion 37 to flex inward for attachment oflever 36 thereto and further provides for theend 34 c of biasingmember 34, as discussed above. Anannular groove 37 b may also be included aroundlower portion 37 for securinglever 36 thereto. - As best shown in
FIGS. 4 a and 4 b,lever 36 is preferably a substantially straight lever arm, which includes anopening 40 at acenter region 36 a through whichlower portion 37 ofshaft 12 b is inserted, such thatlever 36 is fixedly secured toshaft 12 b ofhandle 12.Lever 36 may includeangled tabs 40 a protruding inwardly at opening 40 to engage acorresponding lip 37 c alonggroove 37 b ofshaft 12 b, thereby snappinglever 36 ontolower portion 37 to preventlever 36 from being removed fromshaft 12 b.Tabs 40 a oflever 36 function similarly totabs 35 b ofbarrel section 35 as they engagelip 37 c and preventlever 36 from being removed fromshaft 12 b. Aslower portion 37 ofshaft 12 b is inserted through opening 40 inlever 36,tabs 40 a camlower portion 37 inward, asslot 37 a allowslower portion 37 to flex inwardly, untiltabs 40 a snap intogroove 37 b. Preferably, both opening 40 andlower end 37 ofshaft 12 b are correspondingly substantially non-circular, such thatlever 36 cannot rotate relative toshaft 12 b. More preferably, opening 40 andlower shaft end 37 are substantially square as shown inFIG. 5 . - At a
cable end 36 b oflever 36, there is located an attachingslot 42 or the like, which may be secured tocable 38. Anopposite end 36 c oflever 36 may extend fromcenter region 36 a and provide anengaging surface 36 d, such as a flattened or notched region, for engagement with an electrically operable actuating or release assistdevice 84, as discussed below. As shown inFIGS. 4 a and 5, an underside ofhousing 28 provides for a cavity in whichlever 36 is also substantially encased, again to prevent damage to the lever and to further prevent accidental activation of therelease mechanism 14. -
Cable 38 preferably comprises aninner cable 38 a and anouter sheath 38 b through whichinner cable 38 a may travel. At eachend inner cable 38 a is apin 44 for engaging a corresponding slot or other attaching means.Pin 44 on afirst end 38 c ofinner cable 38 a is secured to slot 42 onlever 36 while a pin (not shown) on asecond end 38 d ofinner cable 38 a is likewise secured to a slot (not shown) onrelease mechanism 14.Outer sheath 38 b ofcable 38 is secured tohousing 28 through acable opening 28 b in one side and to a bracket (not shown) substantiallyadjacent release mechanism 14. Movement offirst end 38 c ofinner cable 38 a therefore results in a substantially similar amount of travel ofsecond end 38 d ofinner cable 38 a, whilecable 38 is maintained bysheath 38 b in a predetermined path betweenhousing 28 andrelease mechanism 14. - When handle 12 a is grasped and pivoted about its
pivot axis 22,lever 36 is correspondingly pivoted about thesame axis 22. As shown inFIG. 5 , this results incable end 36 b oflever 36 traveling along an arcuate path which causes a linear travel of substantially the same distance to occur tofirst end 38 c ofinner cable 38 a. Asfirst end 38 c travels along the arcuate path,second end 38 d of inner cable likewise is moved a linear distance substantially equal to the linear travel offirst end 38 c.Safety release assembly 10 is designed such that pivoting handle 12 a untilhandle 12 a is approximately atstop 30 a inrecess 30 results in a predetermined amount of cable travel incable 38 so as to activaterelease mechanism 14, thereby openingdeck lid 16 ofvehicle 20. Preferably, this pivot requirement is less than approximately a 15-degree rotation ofhandle 12. Although shown and described as including a lever and cable to activaterelease mechanism 14, clearly the present invention may incorporate other mechanical means for interconnecting thehandle 12 to therelease mechanism 14, without affecting the scope of the present invention. For example, end 36 b oflever 36 may be directly connected to releasemechanism 14 or to another form of linkage, such as an additional lever arm or the like. - Preferably, actuating
device 84 is operable to ease movement of the handle and lever to activate the release mechanism and open the trunk of the vehicle.Actuating device 84 is preferably an electrically operable pull mechanism, such as a solenoid or a muscle wire, which is operable to pull (or push or provide other appropriate motion) a mechanical linkage or cable mechanism to actuate thetrunk release mechanism 14 in response to an electrical signal.Actuating device 84 may be operable to assist movement of the handle as the handle is being moved, or may be operable independent of movement of the handle, such thatactuating device 84 may activaterelease mechanism 14 in response to an activating event or to movement ofhandle 12 or detection of an occupant within the trunk space, as discussed below. Preferably, actuatingdevice 84 comprises a solenoid, as shown inFIG. 5 , which is operable to engage the engagingsurface 36 d ofend 36 c oflever 36 and to pivotlever 36, and thus handle 12, toward an opening position to activate the release mechanism, when device orsolenoid 84 is activated. Thesolenoid 84 may be mounted atlever 36 such thatsolenoid 84 is operable to either push or pull the lever arm in order to activate therelease mechanism 14 of the trunk. - Preferably,
solenoid 84 is oriented such that handle 12 may still be pivoted toward the open position independent of activation of the solenoid, such that the handle is still fully operational without assistance fromassist device 84, in order to provide a fully mechanical release of the trunk if power is disconnected fromsafety release assembly 10. The solenoid may be mounted atsafety release assembly 10 to directly pivot the lever arm, or may be mounted external to the release assembly, such that the solenoid indirectly causes movement of the lever arm and/or the mechanical linkage to release the trunk. Alternately, the assist device may be positioned immediately adjacent to or at thetrunk release mechanism 14 to directly activate the release mechanism in response to a movement ofhandle 12 or an occupant detection. Although shown and described as a solenoid which is engaged withlever 36, theactuating device 84 may otherwise comprise a conventional solenoid for activating the release mechanism of the trunk via a button or other switch positioned in the cabin of the vehicle, a muscle wire (a known wiring which is operable to contract when electricity is applied thereto. Muscle wires, which are also known as shape memory alloys, can assume radically different forms or “phases” at distinct temperatures. When conducting an electric current, the muscle wire heats and shortens in length, generating a usable amount of force. Muscle wires typically are bi-metals such as of a nickel-titanium alloy such as Nitinol) attached toassembly 10 such that as the wire contracts when electricity is applied, the contraction of the wire pulls at and assists in pivoting the handle or in activating the release mechanism, or independently activates the release mechanism, in response to movement ofhandle 12 or detection of a person or animal within the trunk space. Also, the assist device, such asactuating device 84, can comprise a motor mechanism and/or a motor-driven gear, without affecting the scope of the present invention. - Alternately, the assist device can optionally comprise a compressed gas source that, upon detection of an occupant trapped in a trunk compartment and/or upon a trapped occupant touching or pulling a trunk release handle or element, a gas powered-cylinder can be actuated to generate the pull needed to release the trunk latch mechanism and thus release the trunk lid to allow the trapped occupant to escape. Thus, for example, actuating
device 84 can comprise a gas-operated piston in communication with a compressed gas (such as air or carbon dioxide) cylinder. For example, pressurized carbon dioxide can be held in a compact capsule or cartridge that is readily removable for service replacement after discharge. When a trapped person contacts a trunk release element, such as an active trunk release handle and/or a passive detector (such as a pyro sensor or similar thermal sensor, such as are disclosed in co-pending and commonly assigned U.S. patent application Ser. No. 08/901,929, filed Jul. 27, 1997 by Gimtong Teowee et al. of Donnelly Corporation entitled PYROELECTRIC INTRUSION DETECTION IN MOTOR VEHICLES, now U.S. Pat. No. 6,166,625, the entire disclosure of which is hereby incorporated by reference herein), indicating that a person is trapped, the gas cylinder is caused to discharge into the gas-powered piston, which pulls a cable or the like to release the trunk latch. Since the power used to release the latch is provided by the compressed gas source, this can occur even in the complete absence of electric power in the trunk (such as might be the case in an abandoned vehicle whose battery has depleted). Therefore, by combining a manually operable trunk release handle with a compressed gas-actuated assist element, the mechanical advantage of the handle can be greatly enhanced. Thus, for example, a trapped child, attracted to a self-luminous trunk release handle, need only exert sufficient force to open the valve of the compressed gas cylinder or cartridge to release the compressed gas to actuate a piston that pulls a cable that releases the trunk latch. - As described above, the release handle or element for use in opening a deck lid of a trunk compartment of a vehicle may include or be connected to a gas operable actuating or assist device that is connected to the deck lid latch. The pressure of the gas released from, for example, a compressed gas container, such as a compressed carbon dioxide container or cylinder (that can be a compact cylinder of the dimension such as is conventionally used to power air pistols, tonic water dispensers and the like), can be harnessed to generate a pulling action on a cable connected to the latch of the trunk deck lid, and so release it from the inside to allow escape of a trapped individual. The potential energy of the gas stored in the gas cylinder, when released, can generate a force of 10 to 50 Newtons, or more, pulling on the trunk lid release mechanism. Preferably, at the operating temperature of the vehicle, the pressurized gas contained within the container is in a liquid state.
- It is further envisioned that a gas operable actuating or assist device for release of a trunk latch can be provided that utilizes a pyrotechnic device to generate a high gas pressure when fired. For example, a pyrotechnic device such as is conventionally used to deploy an automotive air bag can be used. Air bag deployment actuators, as known in the automotive art, commonly include a pyrotechnic device that typically consists of a compact canister (typically a cylinder) containing an explosive substance. When the explosive substance is detonated, it rapidly produces a large volume of gas, and this gas fills and deploys the air bag in milliseconds. Such air bag deploying canisters are economically available, and are deemed safe to use in an automobile.
- One embodiment of this present invention utilizes an air bag canister as part of the trunk deck lid release system. These pyrotechnic elements, such as air bag canisters, are compact and one (or more) can be included into or connected to a trunk-release handle mechanism located within the trunk interior. When a trapped occupant triggers the explosive in the pyrotechnic element (such as by causing a detonating cap to activate by pulling on a trigger mechanism that releases a spring-loaded plunger or arm), the resultant gas generated by the explosion can cause a mechanical element such as a piston to move, thus exerting a pulling force on a cable connected to the trunk latch to release the deck lid. The mechanical effort required by the trapped occupant is minimal, as all that need be done is, in effect, to pull or otherwise actuate the trigger to explode the pyrotechnic device, and thus release the gas that operates opening of the deck lid. No electrical power of any kind need be present, making such a gas-operated release mechanism particularly useful in releasing children trapped in the trunk of a parked and abandoned vehicle that has lost all battery power. Optionally, such a pyrotechnic gas operable assist device or release mechanism can include a motion detector such as the thermal sensors described in the present invention in order to effect release of a trapped occupant in the trunk. Operation of the pyrotechnic device can be locked-out, as described in the present invention, to prevent operation when it would be unsafe or unnecessary to activate the device (such as when the vehicle is being normally driven). Use of such a pyrotechnic element in conjunction with the safety handle and/or the automatic occupancy detection systems of the present invention allows provision of a compact, reliable, trapped-occupant release mechanism for a vehicle trunk, even when the trunk release latch is not configured to be electrically operable. Thus, the pyrotechnic element-activated release systems of the present invention are suitable to use for OEM and aftermarket installations in a wide variety of vehicles. It is further envisioned that the gas operable assist device may be useful in opening any other doors or compartments of a vehicle. For example, the gas operable assist device may be useful in opening an emergency exit door or window of a school bus or the like, in order to provide a quick release or opening of the door or window to facilitate a quick exit of the vehicle. The quick release of the exit may be accomplished with minimal effort on the part of the person opening the door or window.
- Alternately, or additionally, the assist device of this present invention can comprise a mechanical assist device such as a coiled spring that stores potential energy in a compressed spring member. Thus, for example, a trapped child, attracted to a trunk release handle, need only exert sufficient force to displace a mechanical member, such as a pin or the like, that is holding back a coiled spring that, when so released, pulls a cable that releases the trunk latch. Having a trunk release module that includes a manual release handle and a compressed gas-powered assist device and/or a mechanical assist device such as a compressed spring member is an advantage since their successful operation is dependent neither on presence of electrical power nor on the strength of the trapped occupant. Therefore, with such non-electrical assist devices, the only effort required of, for example, a child trapped in a trunk compartment, is pressing a button or moving a handle or a similar low-effort user-input action. This low-effort user-input action serves as a trigger that actuates the assist device (such as releasing a valve on a compressed gas source or moving a pin to release a compressed spring that is storing potential energy), and requires application of minimal force by the user. Once so triggered, the assist device, be it a gas-assist device or a spring-assist device, provides the power to generate the force that pulls the trunk lid release latch to release the trunk lid and so enable the trapped occupant to escape. Note that the assist device can be located at, and optionally as part of, the trunk latch mechanism.
- Although
safety release assembly 10 is shown and described as including a handle, lever and cable system, it is further envisioned that other means of activating a release latch or mechanism may be implemented. For example, for a vehicle including an electronically operated latch, the safety release assembly may include an electromechanical device for signaling or activating the latch and thus opening the deck lid. The electromechanical device may be a push button, handle or switch positioned within the trunk space and electronically interconnected with the latch mechanism, such that activation or movement of the device energizes a solenoid within the latch mechanism or otherwise causes the latch mechanism to release, thereby opening the trunk. The device may be a bright color and may be easily recognized and operated by a small child in accordance with the present invention as discussed above. - Preferably,
safety release assembly 10 further comprises at least oneillumination source 46 and/or 82 for providing illumination to handle 12, and anelectronic control circuit 48 for at least temporarily activating theillumination source 46 and/or 82 in response to at least one activating event, as discussed below. The illumination source may be adirect source 82 or may be anindirect source 46 of illumination athandle 12. The illumination provided byillumination source trunk space 18 to seehandle 12 so as to grasp the handle and open the trunk, as the trunk space would otherwise be too dark for a person to see where the handle is located. This is especially critical when a child is trapped in the trunk, as a child would not even know to look for such a handle, much less know where the handle may be positioned within the trunk. Most preferably, the light emitted byillumination source - Preferably, the illumination source comprises a
handle illumination source 82 positioned at or alonghandle 12, to provide direct illumination ofhandle 12.Handle illumination source 82 may comprise any known lighting source and preferably comprises a light source which has a minimal or no draw of current from the vehicle battery or the power source. Alternately, or in addition thereto, handleillumination source 82 may be provided byhandle 12 being made out of a highly visible and glowing phosphorescent material or the like. Preferably, handleillumination source 82 comprises a self-luminous light source, which provides continuous illumination without a draw of current from a power source and without the need for periodic exposure to light (such as is the case with conventional phosphorescent materials which, because they lose their light emission intensity when stored in the dark without exposure to a light source to recharge, are not self-luminous light sources). Self-luminous light sources are preferred over phosphorescent or fluorescent materials, since self-luminous light sources do not require light, such as sunlight, to charge. In contrast to self-luminous light sources, the illumination provided by phosphorescent and/or fluorescent materials decreases in intensity the longer the materials remain in a dark or dimly or sporadically lit area. Because the light source of the present invention is located within the trunk of a vehicle, there will be little, if any, ambient light present for prolonged periods of time. A self-luminous light source is thus preferred, since it provides substantially constant illumination intensity regardless of the surrounding lighting conditions. Preferably, the self-luminous light source is operable to provide light and intensity of at least approximately 5,000 micro-lamberts. The self-luminous and self-sufficient light source preferably comprises a Tritium gas capsule, which requires no light or electricity to charge and thus provides illumination, via radioactive decay of the elements, with no draw on the vehicle's battery. Tritium gas capsules are known and are available in various sizes, shapes, and colors, such as those commercially available from SRB Technologies Inc. of Winston-Salem, N.C. The Tritium gas capsules comprise an isotope of hydrogen which has a long operable life of at least approximately 12 years. These self-sufficient light sources comprise low levels of radioactive material, but are safe and have been approved for various consumer applications. A suitable self-sustaining light source is available from SRB Technologies Inc of Winston-Salem, N.C. under the trade name Saunders-Roe Betalight®, and requires no electrical energy or light exposure to illuminate. - Preferably, handle
illumination source 82 further comprises a back lit, substantiallytransparent panel 86, which may further comprise a symbol oricon 86 a, such as a vehicle with a trunk open (FIG. 3 ) or an arrow in the direction which the handle should be moved to open the trunk, or any text or other picture which may convey to a person within the trunk that movement of the handle will activate the release mechanism of the trunk.Handle 12 may then comprise alight recess 12 d along itssurface 12 c.Light recess 12 d may be recessed within a back litpanel recess 12 e alongsurface 12 c, such that the substantiallytransparent panel 86 is mountable withinrecess 12 e and substantially encasesillumination source 82 withinlight recess 12 d.Handle illumination source 82 is securable along and withinlight recess 12 d to provide direct illumination ofhandle 12 from withinhandle 12. Although shown and described as being positioned alonghandle 12, an indirect light source may be positioned elsewhere atsafety release assembly 10 or elsewhere withintrunk space 18 to provide an indirect illumination ofhandle 12 when the trunk is closed, without affecting the scope of the present invention. - As shown in
FIGS. 4 a and 5,illumination source 46 may alternately (or additionally) be located on a circuit board orchip 50 containingcontrol 48, and may be substantially encased along withcontrol 48 withinhousing 28 in order to prevent damage toillumination source 46 orcontrol 48 by items stored within the trunk.Illumination source 46 may project light through at least one slot or opening 52 in a side wall 30 b ofrecess 30 such thatillumination source 46 is directed towardhandle portion 12 a ofhandle 12.Handle portion 12 a may also be twisted or angled such that the facingsurface 12 c ofhandle portion 12 a is angled towardillumination source 46 in order to receive and reflect illumination fromillumination source 46 over a greater surface area. Aremovable access panel 28 c (FIG. 2 ) may also be included onhousing 28 to provide for easy access for installation and maintenance of bothcontrol circuit 48 andillumination source 46 within acavity 28 d formed byhousing 28. Preferably,control circuit 48 is snap fit onto aninterior side 30 c of sidewall 30 b such thatillumination source 46 is aligned withslot 52.Control circuit 48 further includes a wiring harness andconnector 60 for connectingcontrol circuit 48 to a power source (not shown) located onvehicle 20, such as the vehicle battery or the like. -
Illumination source 46 is thus provided to illuminatehandle 12 when the deck lid of 16 ofvehicle 20 is closed, since thetrunk space 18 becomes very dark when fully enclosed.Illumination source 46 may comprise a self luminous light source or may comprise at least one light emitting diode (LED) or other non-incandescent illumination source (such as organic or inorganic electroluminescent sources, phosphorescent sources, etc.), since these types of illumination sources eliminate or minimize the drain on the vehicle battery when they are activated, as well as being highly durable and long-lasting. The light sources may be selected to provide illumination in a preferred color, such as green or yellow, and may be selected to draw a minimal amount of current from the vehicle battery or the like. Preferably, an LED is selected which draws less than about 45 milliamps when activated, and more preferably, the LED draws less than or equal to about 30 milliamps when activated. Such LEDs are commercially available, examples being a Hyper-Bright LED manufactured by Siemens or other LEDs manufactured by Hewlett-Packard. Most preferably,illumination source 46 comprises at least two LEDs, so that if one fails for some unforeseen reason, there is still at least one additional LED providing illumination to handle 12. Althoughillumination source 46 is shown and described as an LED or the like, clearly other illumination sources may be provided in varying locations within the trunk without affecting the scope of the present invention. Additionally,illumination source 46 may be an incandescent source, such as a filament lamp, a halogen lamp, a neon lamp, or the like.Illumination source 46 may also serve as the standard trunk light, which is normally activated when the trunk or deck lid is opened, thereby providing light to the entire trunk space when the trunk is closed. - If
illumination source 46 and/or 82 comprises a self-luminous light source, then the illumination source is thus continuously activated or luminescent. Alternately, however,control 48 may be operable to activateillumination source 46 or handleillumination source 82 upon an occurrence of an activating event. The activating event may be the closing ofdeck lid 16 and/or the closing or folding back of any fold-down rear seats which may be present invehicle 20. For example, as shown inFIG. 6 ,vehicle 20 may include atrunk closure sensor 54 and/or aseat sensor 56 to provide a signal to controlcircuit 48 when the trunk is closed or the seats are folded to their upright position, thereby enclosingtrunk space 18. Preferably,control circuit 48 also functions to deactivateillumination source 46 after a period of time following the activating event. For example,control circuit 48 may include a timer orother timing mechanism 58 which triggers deactivation ofillumination source 46 after a predetermined period of time, such as thirty minutes or an hour, has elapsed following the initial activation ofillumination source 46.Control circuit 48 continues to reset and reactivateillumination source 46 upon subsequent occurrences of one or more activating events, following deactivation ofillumination source 46 after the predetermined period of time has elapsed. - Referring now to
FIG. 6 ,control circuit 48 may also activateillumination source 46 and/or 82 in response to additional activating events, such as anignition switch 62 ofvehicle 20 being activated, adoor sensor 64 signaling that a door ofvehicle 20 is being opened or closed or other functions ofvehicle 20 which pertain to the entering or leaving ofvehicle 20 or movement of the vehicle.Safety release assembly 10 may further include one or more occupant sensors 65, such as a motion detector or sensor 66 (such as a pyro detector, and preferably a low current pyro detector as are disclosed in commonly assigned U.S. patent application Ser. No. 08/901,929, filed Jul. 27, 1997 by Gimtong Teowee et al. of Donnelly Corporation entitled PYROELECTRIC INTRUSION DETECTION IN MOTOR VEHICLES, now U.S. Pat. No. 6,166,625) and/or atemperature sensor 68, such as a bolometer, withintrunk space 18, so as to provide a signal to controlcircuit 48 when a movement or predetermined temperature of an object intrunk space 18 is detected. The occupant sensor 65 may be of the type disclosed in commonly assigned U.S. patent application, Ser. No. 09/484,754, filed Jan. 18, 2000 by McCarthy et al. for COMPARTMENT SENSING SYSTEM, now U.S. Pat. No. 6,480,103, U.S. Provisional Application, Ser. No. 60/135,393, filed May 21, 1999 by McCarthy et al. for COMPARTMENT SENSING SYSTEM, and in EPC Application No. 00650023.5, filed Mar. 23, 2000 by Bingle et al. for SAFETY SYSTEM FOR A CLOSED COMPARTMENT OF A VEHICLE, the disclosures of which are hereby incorporated herein by reference.Safety release assembly 10 may also comprise a handle sensor 70 which detects contact with or movement ofhandle 12 to provide an additional signal to controlcircuit 48. Handle sensor 70 may be a push button or a motion detector athandle 12, or may be a touch pad at a surface ofhandle 12, which senses contact ofhandle 12. The touch pad may be temperature sensitive, so as to be capable of discriminating between the touch of a person and contact of the handle by an item stored withintrunk space 18. The touch pad or soft touch surface ofhandle 12 may detect and discriminate human touch from other items via capacitive, resistive or inductive activation andcontrol 48 may then activate theillumination source 46 and/or 82 and/or theassist mechanism 84 in response to such discrimination. - Preferably, the trunk occupancy detection sensor or sensors are passive sensors which substantially continuously monitor the trunk space or handle when the deck lid is closed.
Control circuit 48 may then, in response to a signal from themotion detector 66, thetemperature sensor 68, or the handle sensor 70, activateillumination source 46 and/or 82 to provide illumination ofhandle 12 intrunk space 18 or may activate assist or actuatingdevice 84. Furthermore, in response to such signals, which convey a message that a person or animal may be entrapped withintrunk space 18,control circuit 48 may activate other additional auxiliary signals or displays. For example,control circuit 48 may activate analarm 72, ahorn 74, anauxiliary light 76 elsewhere onvehicle 20, a door or trunk lock orlock release 78 ofvehicle 20, anauxiliary message display 80, which may be withinvehicle 20 or remote from the vehicle, or the like, in order to provide an operator or anyone else within the vicinity ofvehicle 20 information pertaining to a person or animal being entrapped within thetrunk space 18 of the vehicle. Thealarm 72,auxiliary light 76,horn 74,message display 80,lock system 78 or the like may be activated upon a first detection of motion or temperature withintrunk space 18, or may alternatively be activated upon a second, third, or fourth occurrence of such detections. The number of detections required prior to an alarm or the like being activated bycontrol circuit 48 are preferably reset following an opening and closing ofdeck lid 16 or a folding down of a rear seat withinvehicle 20, if applicable. It is further envisioned thatcontrol 48 may activate a voice chip and speaker, in order to convey a voice message which provides instructions as to how to open the trunk, in response to detection of an occupant therein. - Preferably,
illumination source 82 is self-luminous and thus continuously luminescent, andcontrol 48 is operable to activateassist device 84 in response to occupant sensors 65. As discussed above, thecontrol 48 may further activate an alarm, horn, an auxiliary light, an auxiliary message display or the like in response to such a detection. The passive occupancy detection sensors and thecontrol 48 are thus operable as a “smart release” system, which is operable to activate therelease mechanism 14 of thedeck lid 16 when a person or animal is sensed or detected within the trunk. Thecontrol 48 may further function to first determine whether or not the vehicle is moving prior to activating assistdevice 84, in order to prevent opening the trunk while the vehicle is being driven down the road. The control may thus be interconnected to other vehicle sensors, such as the ignition, a wheel speed sensor, or the like to determine the status of the vehicle prior to opening the trunk. If thetrunk release mechanism 14 is an electrical release, the mechanism is typically locked out or inoperable when the vehicle ignition is on. Thecontrol 48 may be otherwise operable to initially activateillumination source 46 and/or 82 upon a first activating event, as discussed above, and delay activation ofassist device 84 until the smart release occupant sensors confirm that an occupant is within the trunk space of the vehicle. For example,control 48 may delay actuation ofassist device 84 until two or more movements are detected within the trunk space or until a threshold temperature is measured over a prolonged period of time. However,control 48 may also be operable to activateassist device 84 in response to a first touch or movement ofhandle 12. In vehicles that already comprise an electrical trunk latch/release mechanism, the electrical release mechanism may be electrically actuated to automatically open the trunk in response to any movement ofhandle 12 and/or the occupant detection sensors 65. The electrical release mechanism may thus be operable to assist in the opening of the trunk withhandle 12 or to automatically open the trunk independent of further movement ofhandle 12. - When installed in the vehicle, the present invention therefore provides for
illumination source 46 and/or 82 to be continuously on or activated for a period of time following closure of the trunk and/or a folding of rear seats ofvehicle 20. While theillumination source 46 and/or 82 is activated, a child or other person who may be entrapped withintrunk space 18 will be able to easily see and identifyhandle 12. Because it is difficult for a person to move about within the small trunk space of a typical vehicle, and because typically it is a very small child that may be entrapped therein, the present invention also provides ahandle 12 which is very easily pivoted about its axis so as to opendeck lid 16 ofvehicle 20. Preferably, handle 12,lever 36 andcable 38 cooperate to allowrelease mechanism 14 ofdeck lid 16 to be opened with only a minimal amount of force being applied to handleportion 12 a. The force required to pivothandle 12 about itspivot axis 22, thereby activatingrelease mechanism 14 ofdeck lid 16, is preferably less than or equal to about 20 Newtons applied in a direction substantially perpendicular to thehandle portion 12 a. More preferably, the force required to opendeck lid 16 is less than or equal to about 15 Newtons and most preferably, the force required is less than or equal to about 10 Newtons. Furthermore, activation ofassist device 84 further increases the mechanical advantage of the system, such that an even lesser or little to essentially no force is required to pivot the handle and open the trunk. A person who is trapped withintrunk space 18, upon identifying thehandle 12 as a means in which to open the trunk of the vehicle, merely grasps the handle and easily pivots the handle, which subsequently activatesrelease mechanism 14 ofvehicle 20 as discussed above. Oncerelease mechanism 14 is activated, the trunk lid may be easily pushed open so as to allow the person to get out of the trunk. - Referring now to
FIG. 7 , an active/passivetrunk release system 100 is operable to actively and passively monitor the trunk space of a vehicle. The system is connected to and includestrunk release mechanism 14, which may be a conventional mechanical release mechanism or may be an electrically operable release mechanism.Trunk release system 100 comprises atrunk release module 110 which is operable to actuaterelease mechanism 14 in response to detection of an occupant within the trunk space, as discussed below. Preferably,release module 110 is a unitary, substantially enclosed module, which may be manufactured remotely from a vehicle assembly plant and purchased by a vehicle manufacturer and then readily installed in the trunk of a vehicle during manufacture of the vehicle. Alternately, therelease module 110 may be readily installed in the trunk of a vehicle as an aftermarket device, without affecting the scope of the present invention.Release module 110 is a self contained, electrically operable unit which needs only to be electrically connected to a power source, such as a vehicle battery, and mechanically or electrically (depending on the vehicle application) connected to thetrunk release mechanism 14.Release module 110 may be adapted for implementation with a mechanical or electromechanical trunk release mechanisms which may or may not be designed for electrical actuation. -
Trunk release module 110 comprises anactuating device 184, which is preferably substantially similar to actuatingdevice 84, discussed above, and acontrol 148, which is operable to actuateactuating device 184 in response to an electronic signal.Release module 110 further includes at least one of an activemanual input device 112 and/or a passive occupancy detection sensor system ordevice 165.Actuating device 184 is preferably then operable to actuate, or assist in actuating,release mechanism 14 in response toinput device 112. Preferably,actuating device 184 is an electrically operable tensile or pulling mechanism, such as a solenoid or a muscle wire, which provides mechanical assistance to theinput device 112 in actuatingrelease mechanism 14 via a cable orlinkage 138. Cable or link 138 may be any mechanical linkage betweenrelease module 110 andrelease mechanism 14, such that manual actuation ofinput device 112 and/or electrical actuation of actuating device 184 (via activation ofinput device 112 and/or detection of an occupant byoccupancy detection system 165 discussed below) causes link 138 to pull onrelease mechanism 14 to release the deck lid. It is further envisioned that link 138 may otherwise be an electrical signal to an electrically operable trunk release mechanism. The assistance by actuatingdevice 184 may thus greatly increase the mechanical advantage of a handle or the like in opening the trunk of a vehicle. Preferably,control 148 is operable to detect activation ofinput device 112 and triggeractuating device 184 accordingly. -
Active input device 112 is operable to activatetrunk release mechanism 14 via linkage orcable 138, in response to a human signal or input. For example,input device 112 may comprise a handle mechanism similar to handle 12 discussed above, where the input may be a contact or turning or rotating of the handle. Alternately,input device 112 may comprise a button, touch panel or the like, whereinput device 112 activates therelease mechanism 14 in response toinput device 112 being touched, depressed, moved, or the like. It is further envisioned thatinput device 112 may even comprise a microphone system which receives a human voice message from an occupant of the trunk and activates therelease mechanism 14 in response thereto.Input device 112 thus is operable to actuaterelease mechanism 14 in response to any active contact or voice message by an occupant of the trunk space of the vehicle. -
Release module 110 may alternately, or additionally, includeoccupancy detection system 165, which is passively operable to detect a presence of a person or animal within the trunk of the vehicle.Occupancy detection system 165 is preferably similar to detection sensors 65 discussed above, and comprises a thermal sensor, such as a pyro detector, and/or a motion detector. The sensor or sensors are preferably operable to continuously monitor the trunk space of the vehicle. If an occupant is detected,actuating device 184 is then actuated to automatically actuaterelease mechanism 14 to open the trunk of the vehicle. As discussed above with respect to actuatingdevice 84,actuating device 184 may be operable to actuaterelease mechanism 14 only after it is determined that the vehicle is not moving. It is further envisioned that the occupancy detection system may be operable in a sentinel mode, whereby the sensors monitor the compartment andcontrol 148 is operable to activate an illumination source or an audio device, such as a voice chip, to issue exit instructions, in response to an initial detection of an occupant. Upon further confirming detection of an occupant and/or in response to subsequent input tomanual input device 112,actuating device 184 may then function to activaterelease mechanism 184. - As shown in
FIG. 7 ,trunk release module 110 may further include anillumination source 182 to provide illumination of the trunk space or at least of theinput device 112.Illumination source 182 is preferably self-luminous such that it provides continuous illumination of the trunk space. However,illumination source 182 may otherwise be any other form of light source, such as an LED or incandescent bulb, and may be actuable viacontrol 148 in response to an activating event or detection of an occupant within the trunk space, as discussed above. Preferably,illumination source 182 includes one or more light-emitting light sources, such as solid-state light emitting diodes (LED), available from numerous sources. Various colors of LED can be used (or combined) such as blue, white, orange, yellow, red, amber and red-orange. Alternatively, an illumination source may be supplied as a conventional incandescent light source, a halogen light source, a fluorescent light source such as a vacuum fluorescent lamp, a light pipe such as fiber-optic bundle forming a light pipe, and the like. Most preferably, illumination is achieved using non-incandescent light sources, such as light emitting diodes (LEDs), organic light emitting material, electroluminescent sources (both organic and inorganic), and the like, and most preferably such non-incandescent sources are low power and are directed sources, such as described in commonly assigned U.S. Pat. No. 5,938,321 and U.S. patent application entitled INTERIOR MIRROR ASSEMBLY FOR A VEHICLE INCORPORATING A SOLID-STATE LIGHT SOURCE, Ser. No. 09/287,926, filed Apr. 7, 1999, now U.S. Pat. No. 6,139,172, which are hereby incorporated herein by reference in their entireties, and such as is disclosed in co-pending and commonly assigned U.S. patent application Ser. No. 09/466,010, filed Dec. 17, 1999, now U.S. Pat. No. 6,420,975, the entire disclosure of which is hereby incorporated by reference herein, and in co-pending and commonly assigned U.S. patent application, Ser. No. 09/449,121, filed Nov. 24, 1999 by Barry W. Hutzel et al. of Donnelly Corporation, and entitled REARVIEW MIRROR ASSEMBLY WITH UTILITY FUNCTIONS, now U.S. Pat. No. 6,428,172; and Ser. No. 09/585,379, filed Jun. 1, 2000 by Barry W. Hutzel et al. and entitled REARVIEW MIRROR ASSEMBLY WITH UTILITY FUNCTIONS, the entire disclosures of which are hereby incorporated by reference herein. - Accordingly,
trunk release module 110 provides a self-contained module for opening the trunk of a vehicle from within the trunk space. The actuating device may be operable to assist an input device, such as a handle, button, or touch panel in opening the deck lid, and/or may be operable to automatically open the deck lid in response to detection of an occupant within the trunk space. The module is especially adapted for vehicles where the trunk release mechanism is not electrically powered, whereby a cable or other mechanical linkage is movable, via pushing or pulling at a remote end, to release the deck lid. However, the present invention is equally applicable to electrically actuable trunk release mechanisms. - An alternate embodiment of the present invention provides for a module, which comprises a handle, sensors, and/or illumination source, a control, and a housing similar to those discussed above, and further optionally includes a license plate holder and lock cylinder for the deck lid, which are positioned on an exterior surface of the deck lid. This embodiment may also optionally include an exterior handle such that the trunk may be opened from outside the vehicle without having to insert a key within the lock cylinder or otherwise enter the vehicle to release a trunk release lever from within the vehicle. The module is installed through an opening in the trunk lid and preferably includes a lock cylinder and release mechanism for opening the trunk. The module preferably further comprises at least one of an illumination source, which is operable to illuminate the handle, and a release assist device, which is operable to assist an occupant of the trunk in opening the trunk or to automatically open the trunk in response to a smart release sensor system.
- Therefore, the present invention provides a safety release apparatus for opening a deck lid or trunk of a vehicle from within the trunk space. The apparatus of the present invention is easy to install in the vehicle, and is easily recognizable and operable by a small child that may become trapped within the trunk of the vehicle. The color and intensity of the handles and illumination are selected to convey a friendly, non-hot appearance to the handle, such that a child will easily see the handle and not be afraid to grasp the handle in order to open the trunk. Furthermore, the control circuit of the present invention is operable to activate the illumination source or other auxiliary signal in response to an activating event and to deactivate the illumination source after a period of time in order to minimize the overall drain on the vehicle battery. The illumination source is also selected to comprise a non-incandescent device, such as an LED or the like, which is highly durable and long lasting, yet requires a minimal amount of energy from the battery of the vehicle, even while it is activated. Alternately, the illumination source may comprise a self-luminous light source, which is operable to continuously illuminate the handle while requiring no current drawn from the battery or power source (which typically is the vehicle battery, although optionally, a separate, auxiliary battery can be provided). Accordingly, even if power is lost to the vehicle, the self luminous illumination source remains operable to illuminate the handle. Alternately, or in addition thereto, the color of the handle may be selected to be a light or bright color, which starkly contrasts the background on which the handle is installed, so as to remain visible in very low light conditions and/or when power is lost.
- Although the control circuit of the present invention requires connection to an electrical power source in order to detect an occupant within the trunk space or to actuate the release assist device, and/or to provide illumination to the handle, preferably no electrical power is required to operate the handle and thus release the release mechanism in order to open the trunk of the vehicle. Preferably, the handle, lever, cable and release mechanism are all mechanical devices, and may override the assist device such that the trunk may be opened even when there is a power loss to the vehicle itself. Preferably, the present invention provides a substantially self contained release module which may be installed within the trunk space of a vehicle and connected to the existing trunk release mechanism or latch. The module is operable to provide assistance to the handle in releasing the deck lid or to independently release the deck lid in response to a detection of an occupant within the trunk compartment.
- Providing a trunk release module that includes an assist device that may be electrically powered and/or that is gas or spring powered has many advantages, particularly when the components of the module (that can include an active manually-operable trunk release element such as a handle, touch surface or button, and/or a passive, occupant sensing element, such as a thermal sensor assembly that thermally detects body motion in the trunk, and/or an assist device, whether electrically operable such as a solenoid or gas operable such as a gas-operated piston, and/or a coupling/cable connecting to the trunk latch mechanism) are housed together in a unitary module assembly. Thus, an automotive supplier can supply such a unitary module (with the various components assembled together and with the module substantially sealed against contamination from the outside environment such as by rain, dust, dirt and the like) to an automaker to fit into new vehicles being assembled on a new vehicle assembly line, or can supply to the aftermarket as a retrofit for an existing fleet of vehicles.
- Referring now to
FIGS. 8-25 , the present invention pertains to a sensing system for compartment applications, particularly for providing an indication of a person or animal trapped in the trunk or passenger compartment of a vehicle, such as an automobile. -
FIG. 8 shows thesystem 1010 in the environment of avehicle 1106. Thevehicle 1106 is a conventional automobile with door locks 1154(a). . . (d) and any other options available on thevehicle 1106. - A
sensor 1102, such a pyroelectric infrared (PIR) sensor (also referred to as a detector herein), is disposed in acompartment 1105, which is shown as a trunk or baggage compartment or cargo compartment or other storage compartment provided in the vehicle. Alternatively, thesensor 1 102 could be mounted in thepassenger compartment 1130. - The interior cabin of a
vehicle 1106 parked in a sunny climate can reach air temperatures in excess of 150° Fahrenheit and humans and pets can be rapidly overcome by the heat. For such applications, thesensor 1102 is suitably mounted in locations such as the rear-view mirror, in the dome light or in the headliner of the vehicle. An occupant sensing system with a sensor mounted on a rear-view mirror is described in commonly assigned U.S. patent application, Ser. No. 08/901,929 filed Jul. 27, 1997, now U.S. Pat. No. 6,166,625, which is hereby incorporated by reference in its entirety herein. - PIR sensors are inexpensive and reliable sensors that require very low power to detect sudden changes in the thermal profile of a
compartment compartment - One or more PIR sensors may be utilized to acquire sufficient sensing input. The
PIR sensor 1102 typically comprises single or multiple elements enclosed in the same package. The package may be a standard TO-5 transistor package, which is a popular metal can package such as the P7178 series available from Hamamatsu™ or the LHi 954 available from Heimann™. A PIR packaged in plastic such as epoxy, polysilane or silicone may also be used. The package may include thin film elements, a thick film load resistor, and a Junction-Field-Effect Transistor (JFET) pre-amplifier. Preferably, all components are hermetically sealed in the package. The sensor may also incorporate RF immunity into the TO-5 package such as a 220 microfarad capacitor in parallel with the pyroelectric elements or metallic grid or coating to reduce stray RF to the elements. Thus, the sensor can incorporate electronic compounds to improve rejection of RF noise to achieve signal amplification and/or noise reduction. - Other types of sensors that are also suitable include thermopile detectors, image sensors, radar, ultrasonic, carbon dioxide sensors, bolometers and a thermal imaging camera.
- Floor mats 1138(a)-(d) include sensing elements 1140(a)-(d) that are capacitive, resistive and/or pressure sensitive. The
mats 1138 are placed on the floor of thetrunk compartment 1105 orpassenger compartment 1130 and are used to produce a signal indicative of the presence of a human or animal in the trunk or passenger compartment. In this embodiment, when a human or pet applies pressure to themat 1138, a signal is produced by the associatedsensor 1140. The signal is indicative of a sensed pressure exerted by the weight of a human or animal. The signal is used by acontroller 1110 to produce a visible indication or release a latch. Also,shock sensors 1142,microphones 1144,level sensors 1136,cameras 1304, and/orbolometers 1306 are suitably used to sense movement in thetrunk compartment 1105. -
Level sensor 1136 is coupled tocontroller 1110 to sense whether the vehicle is being elevated at either end, such as when the vehicle is being towed. -
Cameras 1304 are used to scan the compartment and generate images. Such cameras are known to those skilled in the art. -
Bolometers 1306 are coupled tocontroller 1110 and are broad band detectors that are sensitive to electromagnetic radiation. Although the bolometer is essentially a Wheatstone bridge, with two platinum strips, when one strip receives radiation, its electrical resistance changes slightly compared to the other strip. The measured difference indicates the amount of radiation received. More advanced bolometers use materials more sensitive to temperature, such as semiconductors, indium, antimonide and germanium mixed with gallium or indium. Microfabrication techniques enable the production of arrays of bolometers.Bolometer 1306 is either a single bolometer or an array of bolometers available from Honeywell™. -
Shock sensor 1142 is coupled tocontroller 1110 and is used for detecting impact on portions of the vehicle, for example an occupant striking a compartment wall or glass window while attempting to escape.Shock sensor 1142 is, for example an SH15 sensor available from FBII™. -
Microphone 1144 is coupled tocontroller 1110 and is used to detect sound in the compartment, such as a trapped occupant calling for help. - It is an embodiment of the invention that any combination of the above-listed sensing mechanisms could be used in conjunction with other of the sensing means to sense a human or animal in a
passenger compartment 1130 orcargo compartment 1105 of avehicle 1106. For example, apyro sensor 1102 is suitably combined with ashock sensor 1142 such that thermal energy and motion detection are required to generate a signal indicating the presence of a person or animal. The combination of a plurality of sensors reduces the likelihood of a false alarm. - It is also an embodiment that selected ones of the above-listed sensing mechanisms are operated such that power consumption by the system is minimized. For example, sensing mechanisms that require less power to operate are used as primary sensing mechanisms, which are used to trigger secondary sensing mechanisms. Once the secondary sensing mechanisms are triggered, they can confirm that a viable signal is present. Typically, the primary sensing mechanisms are used to constantly monitor the status of the compartment and upon sensing a possible occupant in the compartment transmit a signal to the secondary sensing mechanisms.
- It is also an embodiment of the invention that the
sensing system 1010 generates a step-wise response by activating particular selected mechanisms, waiting a particular period of time and activating additional mechanisms. For example, thethermal sensor 1102, upon sensing an occupant triggerscontroller 1110 to illuminate a light 1139. When additional activity in thevehicle 1106 is sensed within a pre-determined period of time, thecontroller 1110 will activate a tell/tale indicator 1109. If additional input is received, thecontroller 1110 actuates thetrunk release mechanism 1114. - The step-wise response permits one level of response when a primary sensor is triggered and a second level of response when a secondary sensor is triggered.
- Typically, a human body emits radiation in the 8-14 micron wavelength range with a peak emission typically around 9.3 microns. This radiation, emitted as IR radiation, is absorbed by the thermal sensor, preferably converted to heat, and later to an electric signal. Therefore, a filter material should be installed between the sensor and the view to block radiation in other wavelength ranges to avoid false alarms. The
system 1010 should require less than about one Watt of power, and preferably less than about 0.1 Watts, and most preferably less than about 0.02 Watts, when employed in a vehicle in the parked state. Since thesystem 1010 receives power from thecar battery 1328, vialine 1335, thesystem 1010 will not function when thebattery 1328 is not sufficient. Therefore, it is an embodiment of the instant invention to provide anauxiliary power supply 1270 that supplies power solely for the passive trunk release system (PTRS), and, optionally to the trunk release mechanism. - Conventional vehicles use a 12 volt battery as a power supply. The
sensing system 1010 is continually activated when the vehicle ignition is not operating. Thesensing system 1010 typically draws less than about 15 mA, preferably less than about 8 mA, more preferably less than about 1 mA and most preferably, less than about 0.5 mA. In vehicles with a 42 volt battery power supply or a 48 volt power supply, thesensing system 1010 current draw is less than about 3.75 mA, preferably less than about 1.25 mA, more preferably less than about 0.25 mA and most preferably less than about 0.125 mA. - The
exemplary vehicle 1106 illustrated inFIG. 8 has adeck lid 1108 with inner and outer surfaces 1108A and 1108B, respectively. For trunk applications, thethermal sensor 1102 is suitably mounted in a number of different locations including thedeck lid 1108, underneath a parcel shelf in the trunk 1105 (parcel shelf not shown), the front of the trunk (i.e., on the inside behind the license plate), and on the back of the trunk, for example, on the inside portion of the back seats 1197A and 1197B. The security of the mounting is very important since movement of thethermal sensor 1102 against the vehicle body could cause a false signal. Mounting techniques include mechanical attachments and/or adhesive attachments and typically include, for example, adhesives, Velcro™, pins, bolts and screws. The mounting of thethermal sensor 1102 can either be distinct or integral. If the mounting is distinct, it can be for example, a separate mounting bracket or back plate. If integral, the mounting is molded into the housing of thesensor 1102. Typically thethermal sensor 1102 is mounted on thedeck lid 1108 or alternatively attached at the parcel shelf at the trunk to prevent possible damage when luggage or other objects are placed in the trunk. - A
latch mechanism 1114 is mounted on thevehicle 1106 to enable thetrunk deck 1108 to maintain a closed position in relation to thevehicle 1106. Thelatch mechanism 1114 can be actuated when thethermal sensor 1102 generates an alert signal and acontroller 1110 causes thelatch mechanism 1114 to enter an “open” position and thus open thetrunk deck 1108. Thelatch mechanism 1114 is capable of generating a trunk lid status signal indicative of whether the trunk lid is “OPEN” or “CLOSED.” This trunk lid status signal is transmitted to thecontroller 1110. - Alternatively, a latch module (not shown in
FIG. 8 ) is suitably located remotely from thelatch mechanism 1114 and generates a trunk lid status signal indicative of the position of thetrunk lid 1108. - A tell/
tale light 1109 is mounted on the dashboard of thevehicle 1106 and coupled tocontroller 1110. The tell/tale light 1109 is suitably actuated when thesensor 1102 detects a change in the temperature of thecompartment 1105 such that thesensor 1102 generates an alert signal and thecontroller 1110 activates the tell/tale light 1109. The location of the tell/tale light 1109 is a design choice and lacks criticality. Indeed, thesystem 1010 could function without the tell/tale light 1109, and utilize other indicators, such asinterior lights 1150,horn 1111, headlights 1120(a) and (b) or any combination thereof. One example of using thehorn 1111 to indicate a sensed condition is sounding thehorn 1111 to produce the SOS signal, which will be reserved exclusively to signify a human being trapped in thevehicle 1106. Also, the headlamps 1120(a) and (b) could flash an SOS signal to indicate a human is trapped in thevehicle 1106. Also, activating a conventional anti-theft vehicle alarm system (not shown), turning on theinterior lights 1150 of a vehicle, and/or activating a telemetric, wireless vehicle remote command system such as an ONSTAR™ or RESCU™ (not shown) system are other examples of indicating that a sensed condition is present in thevehicle 1106. - In addition to the SOS signal another pattern of output by the horn, headlamps, interior lights and the like could be used. This output signal could be reserved specifically for a trapped occupant such that people hearing the output or seeing the signals would understand the significance of the output.
-
Ignition module 1206 is typically located on the steering column and is coupled tocontroller 1110. In one embodiment, when the ignition 1107 is “ON,” indicating that the engine is running, thecontroller 1110 will not activate thelatch mechanism 1114. Thus, thetrunk lid 1108 will not open if the engine is running. - Temperature sensor modules 1352(a) and 1352(b) are also mounted in the
compartments controller 1110. When the ambient temperature exceeds a predetermined quantity, thecontroller 1110 will generate a control signal more quickly. This has the advantage that if a child is trapped in atrunk 1105 on a hot day, thelatch mechanism 1114 trunk release will be actuated in less time. This will reduce the likelihood that a trapped child will suffer injuries related to excessive heat. Thethermal sensor 1102 is also suitably coupled to temperature sensors 1352(a) and 1352(b) and is adapted to provide different signal strengths with changes in the ambient temperature. The temperature can be monitored bytemperature modules 1352 and used to influence the gain of the output so that a reliable signal is received at all times. This reduces the likelihood of a false alarm condition since the baseline of thethermal sensor 1102, which might drift upward as the ambient temperature increases, is corrected. The signal received from thetemperature sensing modules 1352 is used to determine whether an alert signal is generated. For example, in a situation in which the ambient temperature of thevehicle passenger compartment 1130 is between 55 and 70 degrees Fahrenheit, thesystem 1010 may not generate an indication at all, since it is acceptable for passengers to be in thepassenger compartment 1130 at such temperatures. - One potential for false detection is towing the vehicle 1106 (ignition of car in “PARK”) with hot or cold groceries or other items that influence the temperature of the
cargo compartment 1105 onpassenger compartment 1130. The movement of thevehicle 1106 may cause these items to shift, thus generating a positive detection signal. One method to prevent this is to utilize alevel sensor 1136, which is coupled to thecontroller 1110, so that when thelevel sensor 1136 detects a towing condition, thecontroller 1110 is disabled. - It is possible that an output signal may be generated falsely by movement of the body of the vehicle 1106 (i.e. rocking a
vehicle 1106 that has a bag of ice in the trunk 1105). In order to overcome this possible concern, thethermal sensor 1102 is suitably combined withmotion detector 1132. The combination of themotion sensor 1132 and thethermal sensor 1102 means that unless both sensors are triggered, an alarm condition will not be generated. - Use of the
level sensor 1136 to detect vertical and horizontal movement will reduce the likelihood of a false alarm generated by wind gusts, since wind gusts typically produce primarily horizontal movement components and very slight vertical movement components. Also, filtering the received signals reduces the likelihood of a false alarm situation, since humans moving in avehicle compartment - Inanimate objects in motion are greatly dependent on the resonant frequency of the vehicle. For example the General Motors™ 2000 Impala™ has a resonant frequency at about 2.25 Hz. Almost all heated or cooled inanimate objects will oscillate at this frequency for that particular car. All automobile natural frequencies will differ according to the size of the vehicle.
- Optionally, movement of inanimate objects put into motion by resonant motion of a vehicle can be distinguished from human or animal motion. This is achieved on the basis of frequency motion resulting from car motion that can only occur at a frequency at or above that frequency of the car.
- Another potential for false detection is when the
vehicle 1106 is in a car wash and hot and/or cold groceries are also in thevehicle cargo compartment 1105 orpassenger compartment 1130. In order to prevent an alarm condition, amotion sensor 1132 to sense motion within the vehicle compartments 1105, 1130 is suitably used in conjunction with thethermal detector 1102. - In situations in which the vehicle is rocked or in a carwash, it is preferable to have the
trunk lid 1108 remain closed. - Various indication alternatives may be used, including the flashing of
interior lights 1150, siren and a cellular phone call to 911 or another user-specified number to alert the user or other personnel of an alarm condition. Depending on the type ofvehicle 1106 the system output may vary. For some vehicles, the trunk lid can be released through the Body Control Module (BCM) 1151. The BCM release of thetruck lid 1108 will require thePTRS system 1010 to ground an output to theBCM 1151. For other vehicles, thetrunk lid 1108 must be released directly. Thesystem 1010 would then supply a pulse to the rearcompartment lid motor 1303. Other indications such as sounding thehorn 1111, flashing the lights 1120(a) and 1120(b), and/or sounding an alarm are suitably used. Also, activating or “beeping” a remote keyless entry module, or activating a LO-Jack™ system are other means of indicating that a human or animal has been sensed in thevehicle 1106. - Another feature of this invention is seat position sensors 1199(a) and 1199(b) that provide an indication of seat position. Thus, rear seats 1197(a) and (b) referred to collectively as 1197, of
vehicle 1106 seal off thetrunk compartment 1105 when they are in an upright position.Seat position sensors 1199 sense the position of seats 1197 and when the seats are not in an upright position, thetrunk release mechanism 1114 will not be actuated. This enables passengers to occupy thetrunk compartment 1105 without activating the system when the rear seats 1197 are down. This is particularly useful in compact cars in which the rear seats 1197 are put down for additional storage. The status of the rear seat position is suitably used to determine whether to generate an alarm condition. For example, if the rear seats 1197 have been folded down and thetrunk lid 1108 has not been opened prior to a sensed signal, thecontroller 1110 determines that any received signal is a false alarm and will not generate an alarm condition. - The rear seats 1197 are also coupled to the
controller 1110 such that if the seat position sensors 1199(a) and 1199(b) indicate that the rear seats 1197 are in the upright position and an alarm condition is generated, the rear seats 1197 will be released. This will provide a means of escaping from thetrunk compartment 1105 into thepassenger compartment 1130 of thevehicle 1106. This permits exit from thetrunk compartment 1105 without compromising the security of thevehicle 1106. -
Speakers 1137 are mounted in thetrunk compartment 1105 of thevehicle 1106 so that a recorded message is played when an alarm condition is generated. This message may be recorded by an owner of the vehicle who may have a child who is likely to be trapped in the trunk of thevehicle 1106. Thus, a child trapped in thetrunk 1105 of the family car will hear a recorded message by their parent. This message could instruct the child regarding release, i.e. pulling on amanual release handle 1134 or to stay calm. - Alternatively, a
solid state chip 1152 is suitably used to output a pre-recorded message when an alarm condition is generated. The content of this pre-recorded message is typically instructions regarding exiting thevehicle 1106. - An illumination source, such as a light, 1139 is coupled to
controller 1110 and is mounted in thetrunk compartment 1105 to illuminate thecompartment 1105. Typically the light 1139 is positioned to illuminatemanual release handle 1134. The light 1139 is typically an array of LEDs that are capable of emitting blue light, yellow light, white light, green light, orange light, red light or any combination thereof. - Also, a second illumination source, such as a light, 1135 may be suitably disposed at or within
handle 1134 to illuminate thehandle 1134 from within. This enables a handle to be illuminated when a person is sensed in the trunk. This is used in conjunction with a pre-recorded message instructing the trapped person to pull the illuminated handle. -
FIG. 9 is aflow chart 3000 showing steps using primary sensing mechanisms in conjunction with secondary sensing mechanisms to generate an alert condition. These steps are suitably stored on a computer readable medium. This has the advantage that only a minimum number of sensors (i.e., primary sensors) need to be constantly monitoring a compartment area. The primary sensors suitably alert the secondary sensors when the primary sensors sense viable input. This reduces the possibility of false triggers because the secondary sensors confirm that an alert condition is present prior to the controller generating an output to a destination such as an indicator or a trunk release. The steps shown inFIG. 9 are used with primary and secondary sensors that have the capability to determine whether the sensed input is a viable signal. Once that determination has been made by the primary sensor(s) the primary sensor(s) send a primary output signal to the secondary sensor(s). The secondary sensor(s) then begin sensing the compartment area. The secondary sensor(s), where appropriate, transmit a secondary output signal to the controller. The controller uses the secondary output signal to activate a trunk release, illuminate a light source, illuminate an indicator or some other action as described herein. - Alternatively, it is also an embodiment of the invention that the primary sensor(s) transmit all sensed inputs to the controller and the controller determines when to actuate the secondary sensor(s). The secondary sensor(s), once actuated, would transmit all sensed inputs to the controller and the controller determines when an alert condition (i.e., adequate quantity of viable signals within a predetermined period of time) is sensed, and thereby transmit a control signal to a destination.
- As shown in
FIG. 9 ,block 3002 is a start block.Block 3004 shows that one or more primary sensors are active to continuously monitor either the cargo compartment or the passenger compartment of a vehicle. The primary sensors are typically low power consumption sensing devices to reduce power drawn by the sensing system.Block 3006 shows that the primary sensor receives viable input from the compartment.Decision block 3008 determines whether or not the number of viable signals received from the primary sensor exceed a predetermined number within a predetermined period of time. Thus,block 3008 helps determine whether a human is being detected. If notline 3010 shows that a counter is incremented as shown incounter box 3014.Line 3012 shows the counter, which has been increased transmits the quantity of signals to block 3004. If a viable signal has been detectedline 3016 shows that a secondary sensor is activated as shown inblock 3018. The secondary sensors then begin receiving input from the compartment and each of the secondary sensors determine whether or not a viable signal is detected, as shown inblock 3019. If not,line 3049 leads to counterblock 3014, to increment the counter. - When the secondary sensor(s) determine that a viable signal has been received, a secondary sensor alert signal is sent to controller as shown in
block 3020, vialine 3039.Block 3021 is a decision block for determining whether or not the vehicle is moving. If it is,line 3022 shows that a visual indicator is actuated. This is typically a tell/tale light as described herein.Line 3030 shows that the process goes to endblock 3032. If the vehicle is not moving,line 3024 leads to block 3026 which actuates a release mechanism, which is typically a trunk release mechanism to open the trunk.End block 3032 is then reached. -
FIG. 10 is a diagram showing the components of an exemplarycompartment sensing system 1020.System 1020 includessensor 1102 coupled to a light emitting diode (LED) 1207 for emittinglight energy 1227. This device provides illumination and may illuminate a release mechanism, for example a symbol or text such as “pull here” which will release the trunk lid. ThisLED 1207 also suitably flashes when a human is detected and thereby attract the trapped human closer to thesensor 1102 and increase the signal strength. Thesensor 1102 also suitably detects variations in a thermal profile of a compartment. Thus,sensor 1102 detects how the thermal profile varies over time; specifically detection of an instantaneous rate of change of temperature (T) with time (t) (□T/□t). Thesystem 1020 can also be used with a manual handle (shown aselement 1134 inFIG. 8 ) which when pulled provides an exit path from the compartment. - The
sensor 1102 is coupled to controlmodule 1110 shown as PTRS module, viabidirectional interconnector 1255. The PTRS module 1110 (also referred to as controller 1110) receives alert signals from thesensor 1102 and actuatesLED 1207. ThePTRS module 1110 is coupled to the transmission gear selector commonly calledPRNDL switch 1104, viainterconnector 1251.Interconnector 1251 is suitably a wire.Ignition switch module 1206 and thespeedometer module 1212 are coupled toPTRS module 1110 viainterconnectors PRNDL switch 1104,ignition switch module 1206 andspeedometer module 1212 generate signals indicative of their current state of operation and transmit them to thePTRS module 1110. ThePTRS module 1110 utilizes these signals to determine whether to generate an alert signal and/or latch release signal. -
PTRS module 1110 outputs a control signal to tell/tale indicator 1109, which is typically located on the dashboard of the vehicle, viainterconnector 1257. ThePTRS module 1110 is also capable of outputting an actuating signal to the trunklatch release module 1214 viainterconnector 1259. The trunklatch release module 1214 includes a motor and a trunk latch, shown herein aselements PTRS module 1110 outputs control signals to other destinations such asheadlamps 1120,siren 1222 andhorn 1111 viainterconnectors PTRS module 1110 is also designed to transmitsignals 1283 to aremote receiver 1218, such as a remote keyless entry module (RKE). Thesesignals 1283 are used to actuate the RKE module so that the trunk lid is opened. ThePTRS module 1110 also transmitssignals 1265 topager 1216 that outputs an indication that thesensor 1102 has generated an alert signal. This indication could be text or a number code displayed onpager 1216. - The
sensor 1102 and/orPTRS module 1110 also may receivesignals 1267 from a remotekeyless entry module 1218. This enables a user to activate an alert signal from a remote location. ThePTRS module 1110 is coupled to the Prindle (PRNDL)switch 1104, viainterconnector 1251.Interconnector 1251 is suitably a wire.Ignition switch module 1206 and thespeedometer module 1212 are coupled toPTRS module 1110 viainterconnectors Prindle switch 1104,ignition switch module 1206 andspeedometer module 1212 generate signals indicative of their current state of operation and transmit them to thePTRS module 1110. ThePTRS module 1110 utilizes these signals to determine whether to generate an alert signal. - The
compartment sensing system 1020 can be packaged with other trunk components such as a trunk light, an RKE system, and a spare tire assembly to decrease packaging and space requirements. - The
sensor 1102 can also sense ambient light and in a situation in which the trunk volume, shown as 1105 inFIG. 8 , is not dark, thesensor module 1102 andPTRS module 1110, will not activate thelight source 1207. - Additional sensors shown as
sensor 1203, which are similar tosensor 1102, may be used for additional detection. Alternatively, theadditional sensors 1203 are any combination of the types of sensing mechanisms described herein. -
Power supply 1270 is suitably an auxiliary power supply.Power supply 1270 is connected toPTRS module 1110 and provides power toPTRS module 1110. Alternatively, any suitable power supply voltage is acceptable. Specifically, it is an embodiment of the invention to utilize a 42 volt power supply. -
Temperature sensor 1352 provides input to thePTRS module 1110. This input is indicative of the sensed ambient temperature in the vehicle cargo compartment or passenger compartment depending on the location of thesensor 1352. Thesystem 1020 receives temperature input to determine if a hazardous condition exists in the interior of a vehicle due to heat. If thetemperature module 1352 senses that the vehicle passenger compartment exceeds 70 degrees Fahrenheit, and an alarm condition is generated, thesystem 1020 might also start the car engine and automatically turn on an air conditioning system in the vehicle, opens automatic windows of the vehicle and/or unlock the doors of the vehicle.Seat position sensor 1199,level sensor 1136,oxygen sensor 1358,shock sensor 1142,microphone 1144,camera 1304,bolometer 1306 andfloor mat sensors 1140 also provide input to thePTRS module 1110 indicative of the various conditions. (See discussion relating toFIG. 8 .) - Any combination of the above-listed sensors may be used to provide input to
PTRS module 1110. - The
system 1020 suitably functions as an anti-theft alarm system whensensors compartment 1130 inFIG. 8 ).Sensor 1102 is suitably mounted in the dome light or overhead console to sense the presence of a person or animal. When a person or animal is sensed, an alarm condition is generated as described above. -
FIG. 11 shows aPTRS module 1110 with athermal detector module 1102 coupled thereto viabi-directional interconnector 1255. The combinedPTRS module 1110 anddetector module 1102 forms adetection device 1313. Thedetection device 1313 utilizes inputs from various input modules to generate one or more outputs. Thedetection device 1313 is coupled to the input modules and output modules through any one of a variety of transmission means. Although nearly all the interconnections are shown as wires, for reasons of clarity, it is apparent to those skilled in the art that other transmission means can also be used. For example, electro-optical coupling, a wireless transmission means such as radio frequency (RF), Infrared (IR), or microwave. A wireless broadcast network could also be used, a wired network bus, local area wireless network as well as a car area network, controlled area network, local area network. In a preferred embodiment, a protocol such as BlueTooth™ from Motorola is used. Types of transmission means for transmitting signals within a vehicle are disclosed in commonly assigned U.S. patent application, Ser. No. 09/466,010, entitled INTERIOR REARVIEW MIRROR SOUND PROCESSING SYSTEM, filed Dec. 17, 1999, by J. DeLine et al., now U.S. Pat. No. 6,420,975 (attorney docket No. DON01 P-787), which is hereby incorporated by reference in its entirely herein. The inputs provide indications of the status ofsystem 1030, which is typically disposed in an automobile, and include, for example, whether the automobile is running or whether the trunk lid is open. Parameters that can be used for thedetection device 1313 to make a valid decision as to whether or not to actuate thetrunk release mechanism 1114 typically include, status of deck lid (open or closed) ignition switch (on or off), transmission state (PRNDL), vehicle speed, temperature inside trunk, supply voltage at the sensor, time and date when signal triggered, and oxygen level and/or carbon monoxide level in the vehicle compartment. -
FIG. 11 showsdetection device 1313 receiving power frombattery 1328 viawire 1335. Thebattery 1328 is suitably the vehicle battery and/or an auxiliary power supply to power thePTRS System 1030.Ignition module 1206 provides input todetection device 1313 viawire 1337. This input is indicative of the whether the engine of the vehicle is running. Input from atrunk lid module 1326, which indicates the position of the trunk deck, is received bydetection device 1313 viawire 1339.Speedometer module 1212 is coupled todetection device 1313 viainterconnector 1364.Speedometer module 1212 produces a signal indicative of whether the vehicle is moving, and more specifically, at what speed the vehicle is moving. -
Oxygen sensor 1358 is used to sense the amount of oxygen in a compartment. Theoxygen sensor 1358 transmits a signal indicative of the oxygen level in the compartment todetection device 1313 via interconnector 1360. Thedetection device 1313 utilizes the output from the oxygen sensor to determine how quickly to actuatetrunk release mechanism 1114. For example, when the oxygen level is below a pre-determined threshold, thedetection device 1313 will generate a release signal to actuatetrunk release mechanism 1114 more quickly. This reduces the likelihood that a person trapped in a compartment will suffocate. - Alternatively, a gas sensor (such as
oxygen sensor 1358 or a carbon monoxide gas sensor) is used to sense the level of carbon monoxide in a compartment. In a situation in which the carbon monoxide level exceeds a pre-determined threshold, thedetection device 1313 will actuate thetrunk release mechanism 1114 more quickly than when there is no threat of carbon monoxide poisoning to a human being or other animal. -
Car seat sensor 1143 also increases sensitivity when present. It is an embodiment to utilize acar seat sensor 1143, coupled tocontroller 1110.Car seat sensor 1143 is mounted in the passenger compartment and senses if a child car seat is present. Also, a user can set theunit 1143 when installing a child-safety car seat. The child/infantcar seat sensor 1143 is used to direct special attention to movement in that area. Infants left alone in a car seat have limited motion since they are strapped in a particular location. Thecar seat sensor 1143 provides additional protection against a child being left in a child/infant car seat inadvertently. -
Level sensor 1136 is coupled todetection device 1313 viainterconnector 1336,seat position sensor 1199 is coupled todetection device 1313 via interconnector 1399,motion sensor 1132 is coupled todetection device 1313 viainterconnector 1334 andRKE module 1218 providessignals 1267 todetection device 1313. -
Floor mat sensors 1140,microphone 1144,camera 1304 andbolometer 1306 also provide input todetection device 1313. The interconnectors are not numbered, but are apparent to those skilled in the art. - Disable signals indicative of the operating status of one or more peripheral modules are transmitted from disable
module 1324, viawire 1341 todetection device 1313. The disablemodule 1324, which is suitably a switch for disabling thesystem 1030 can be activated by a user to prevent thedetection device 1313 from generating a trunk release signal. This enables a user to deactivate thesystem 1030. The disablemodule 1324 is typically located on thedetection device 1313 or alternatively on the dashboard of the vehicle. Although only one disable module is shown it is apparent to those skilled in the art that a plurality of disable modules may be used with the present invention. A disablemodule 1324 may be coupled (interconnections not show) to one or more of the peripheral modules to disable selected peripheral modules. - Also, each peripheral module can have a disable switch so that a user can disable any particular module or combination of modules that they wish to disable. Although the individual disable switches are not shown, it will be apparent to one skilled in the art that the disable switches are part of each peripheral module.
- There may be instances when it is desired to have the
system 1030 non-functional, such as when traveling with pets in the trunk. In order to assure safety, thesystem 1030 is programmed to reset with every ignition cycle and/or every trunk lid opening so that the operator does not forget that thesystem 1030 was turned off. Also, thedetection device 1313 is suitably programmed so that the disablemodule 1324 is disengaged when the keys are in the ignition and/or, when the car is running so that a young child would not be able to disarm it. When the disablemodule 1324 is activated, such as pushing and holding an “ON/OFF” switch down, with the deck lid closed and/or the rear seats up, thesystem 1030 will recognize this as a trapped human and will immediately activate a response, such as open the trunk lid,flash lights 1120, and/or honk thehorn 1111. When thesystem 1030 is disabled, the tell/tale light 1109 is suitably continuously lit to signal an operator of the vehicle that thesystem 1030 is disabled. - Another function for the disable
module 1324 is a panic-mode button. In this case, depressing thebutton 1324 and holding the button down, would immediately release the trunk lid as opposed to waiting a pre-determined period of time specified by an algorithm. This would grant the victim immediate release from the trunk. - A self-test feature using a self-
test button 1323 is used to demonstrate that thesystem 1030 is operational. In this mode upon depressing thebutton 1323, thesystem 1030 would signal that it is operational by, for example, an audible sound, a dashboard light, and/or a blinking LED. One could enter self-test mode by pressing the self-test button 1323 on thedetection device 1313 for a specified length of time or self-test mode could be performed with every ignition cycle. One example of a potential self-test protocol could be as follows: -
- To initiate the self test the deck lid must be open.
- Hold the self-
test button 1323 down for 10 seconds, chirp the - horn once at 2 seconds chirp
horn 3 times at 10 seconds to - indicate the self-test mode hand wave to cycle the latch release
- mechanism and to reset the system.
- Hold the self-
- To initiate the self test the deck lid must be open.
- The
detection device 1313 also suitably receives input fromPRNDL module 1104 viawire 1333. The signal fromPRNDL module 1104 indicates whether the wheels of the vehicle are engaged. Thedetection device 1313 processes the received inputs to generate one or more output signals. For example, if thetrunk lid module 1326 senses that the trunk is in the open position, thedetection device 1313 will not generate a signal to actuatetrunk release latch 1114, since the trunk lid is not closed. Similarly, if thedetection device 1313 receives a signal from thePRNDL module 1104 that the wheels of the vehicle are moving, thedetection device 1313 will not actuate thetrunk release latch 1114 since opening the trunk of an automobile while the automobile is moving would present a potential safety hazard. - In a situation in which the vehicle is moving, the
detection device 1313 would generate a control signal to an indicator. For example thedetection device 1313 would output a signal to a tell/tale indicator 1109 viainterconnector 1257. The tell/tale indicator 1109 illuminates and thereby provides notification to the operator of the vehicle that an alert situation has been detected, for example a child in the trunk. The operator could then manually open the trunk once the vehicle is stopped. - The
detection device 1313 is also capable of generating a control signal to activate other destinations. These destinations include indicators described in relation toFIG. 10 and are shown asheadlamp 1120,siren 1222,horn 1111,lamp 1139,Speaker 1137,BCM 1151, andpager 1216 via signals 1265. Depending on the type of vehicle the system output may vary. For some vehicles, the trunk lid can be released through the Body Control Module (BCM) 1151. TheBCM 1151 release of the deck lid will require the PTRS system to ground an output to theBCM 1151. For other vehicles, the deck lid must be released directly. Thedetection device 1313 would then supply a pulse to the rearcompartment lid motor 1303, viainterconnector 1259. Other indications shown asoptional outputs 1119 are activated viainterconnector 1345. These optional outputs include for example, a cellular phone call, and ONSTAR™ signal. - The
trunk release module 1214, which is typically amotor 1303 and alatching mechanism 1114 for attaching the trunk lid to the vehicle, is actuated upon receiving a control signal, viainterconnector 1347, fromdetection device 1313. In this embodiment thetrunk lid input 1326 sends a signal to thedetection device 1313 indicating that the trunk lid is not in the closed position. If the trunk lid is open, thedetection device 1313 will not actuatetrunk release module 1214. -
FIG. 12 depictscompartment sensing system 1040.FIG. 12 specifically shows amicrocontroller 1410 anddrivers 1476 for generation of control signals.System 1040 includesPIR sensor 1102 for determining a thermal profile in a compartment. ThePIR sensor 1102 transmits a signal representing sensed ambient conditions in a compartment to analogsignal processing unit 1472, viainterconnector 1469. Analogsignal processing unit 1472 processes the input and transmits a signal generated as a function of the thermal profile tomicrocontroller 1410, viainterconnector 1451.Microcontroller 1410 also receives inputs frombattery 1328, viainterconnector 1335,trunk lid module 1326 viainterconnector 1339, transmission gear switch (PRNDL module) 1104, viainterconnector 1333,ignition module 1206 viainterconnector 1337, disablemodule 1324 viainterconnector 1341 andtemperature module 1352 viainterconnector 1353. Also, other inputs such as speedometer, floor mats, camera, bolometer, level, motion, microphone and oxygen sensors are also utilized as shown inFIG. 11 . Themicrocontroller 1410 outputs signals todriver unit 1476 viabidirectional interconnectors Wires microcontroller 1410 anddriver unit 1476. - The
driver unit 1476 transmits signals from themicrocontroller 1410 to output indicators such as tell/tale indicator 1109, andoptional outputs 1119. Other output indicators such as horn, headlamps, siren and pager as discussed above are also utilized. The tell/tale light 1109 also transmits a signal todriver 1476 viabi-directional interconnector 1257 indicating the status of the tell/tale light 1109. Thedriver unit 1476 also outputs a control signal totrunk motor 1303, viainterconnector 1459 to actuate the opening of thetrunk latch 1114. Thus, themicrocontroller 1410 will actuate thetrunk latch 1114 on reception of an alert signal generated by thePIR sensor 1102. -
FIG. 13 showstrunk release algorithm 1050 to actuate a trunk release upon detection of a viable signal. These steps are suitably programmed and stored on a computer-readable medium. A viable signal is a signal that is produced upon detection of an event. Viablesignal decision block 1546 receives input fromincrement counter block 1558 and actuate tell/tale signal block 1564 vialines - The
viable signal block 1546 outputs a signal vialine 1544 if there are no events sensed by the sensors described above. An event is typically a detected activity detected by one or more of the sensors. For example, a thermal detector would designate an event as a sensed change in thermal characteristics of a compartment. If theviable signal module 1546 receives an event signal from the sensor (not shown) it transmits a signal to thechecking module 1552 vialine 1548.Checking module 1552 makes a determination whether or not a pre-specified number of viable signals have been received in a predetermined period of time. If this is not the case, a signal is transmitted online 1550 toincrement counter block 1558. -
Increment counter module 1558 accumulates the quantity of viable signals received until the quantity exceeds a predetermined quantity. Theincrement counter module 1558 sends output toviable signal module 1546 vialine 1574. If the criteria for a viable signal is met, a notification signal is transmitted online 1554 to a vehicle movingdecision block 1562. The vehicle movingdecision block 1562 senses whether or not a vehicle is in motion. If the vehicle is moving, the vehicle moving block will not actuate a trunk release and thus prevent the trunk of a vehicle from opening. This is a safety feature to prevent the trunk from opening when the automobile is moving. If thevehicle moving block 1562 senses the vehicle is moving, it will transmit a signal to a tell/tale indicator 1564 via interconnection means 1570, which is suitably a wire, thereby providing an indication that a person or pet may be trapped in the trunk. - If the
vehicle moving block 1562 does not sense that the vehicle is in motion when a notification signal is received from checkingmodule 1552,vehicle moving block 1562 transmits a signal to actuatetrunk release module 1568 vialine 1566. Thus, if a person or animal is sensed in the trunk, and the vehicle is not moving the trunk latch will be released, permitting escape. -
FIG. 14 shows aflow chart 1060 for controlling a light source mounted in a compartment upon detection of a person or animal in the compartment. This embodiment is suitably used with the latch release mechanism described above. Alternatively, this embodiment is used without the latch release feature and provides light to illuminate a compartment such as a trunk when a person is sensed in the trunk. When a person is sensed in the trunk and the trunk is closed, a light source, mounted in the trunk will be actuated. This permits illumination in the trunk, and thereby facilitate release. In this embodiment, rather than releasing a latch, a light source is activated to enable a trapped person to see in the closed compartment. The apparatus discussed in relation toFIG. 11 is readily modified to include only the components necessary to actuate a light source (light source shown aslamp 1139 inFIG. 11 ). -
FIG. 14 shows aflowchart 1060 of steps that are suitably programmed on a computer-readable medium. These steps are used to actuate a lamp when a viable signal is sensed.Input block 1670 receives input from a sensor (not shown), such as a PIR sensor shown aselement 1102 above. Theinput block 1670 outputs a signal topulse decision block 1676 vialine 1675. Thepulse decision block 1676 determines whether or not there is a viable pulse sensed or whether noise or interference has been sensed. If the pulse is not viable,feedback loop 1577 receives a signal to check the pulse signal again. If a viable pulse has been determined a signal is transmitted to wake updecision block 1682 vialine 1681. The wake updecision block 1682 determines whether or not a pre-specified number of viable pulses has been received in a pre-specified period of time. If this condition is not met, the wake updecision block 1682 transmits a negative signal to record the time of pulse totimekeeping block 1688 vialine 1687. - The recorded time of pulses is transmitted via
line 1689 to be input topulse decision block 1676. If the predetermined number of viable pulses has been exceeded in a pre-specified period of time, a wake up signal is transmitted to actuatelamp block 1692 vialine 1691. This causes a light source, such as an LED or lamp, described above or other illumination device to illuminate a compartment. If the light source is illuminated, a signal is sent to an indicator, such as a tell/tale light in the passenger compartment indicating that the lamp in the trunk is “ON.” This is shown asline 1696 to tell/tale indicator block 1694. - An air pocket trapped between lens and sensor provides a cavity between the thermal sensor and lenslet or
lens surface 1713. This air pocket insulates the sensor from fluctuations in temperature. -
FIG. 15 shows an overview of asensing unit 1702. Thesensing unit 1702 includes sensor (not shown) with an LED (not shown) and an optic lens. The lens can be made of polyethylene or any other material which provides adequate IR transmission. A housing orguard 1710 protects the optic lens. Thehousing 1710 can be made from polypropylene, ABS or any other material which demonstrates adequate strength requirements. Thehousing 1710 protects the lens and also provides a thermal barrier to decrease false alarm conditions. The sensor is preferably disposed behind the lens. - An enable and disable
switch 1724 is provided for manual override of thesensing unit 1702. Theswitch 1724 for the on-off function is preferably recessed within thehousing 1710 so that it is not triggered accidentally. The LED or other illumination device is activated as described above and provides sufficient illumination to enable a trapped person to see inside the compartment or pull a manual handle. This facilitates the trapped person locating a release switch in the trunk, particularly if the trunk is dark. Thesensing unit 1702 is typically a removable unit, that can be repaired or replaced with minimum time and effort. -
Ribs 1714 provide a means of protecting the sensor and optic lens from being damaged by objects impacting the sensor and optic lens. - FIGS. 16(A) and 16(B) show schematic views of a
lens 1703 that is suitably used with the instant invention.FIG. 16A shows an interior portion oflens 1703 andFIG. 16B shows an exterior portion oflens 1703. In order to maximize the signal that pyroelectric elements sense from a defined object e.g. a human being or animal, such as a pet, the pyroelectric element of the signal is proportional to f/(f/#)2; f/#=f/D where f is the lens focal length, # is the lens number, and D is the diameter of the lens. The preferred signal has the shortest focal length possible along with a large diameter lens aperture. - As shown in
FIGS. 16A and 16B , a plurality of lenslets 1716(a) . . . (n) (where n is any suitable number) are used to formlens surface 1713 and increases the sensing ability of the device. An optical design consideration is the magnification of the object caused by the lenslets 1716(a) . . . (n). Due to the preferred detector arrangement of two electrically opposed pyroelectric elements (not shown), the image of the object to be detected needs to be small enough so that the two signals from the pyroelectric elements add constructively. This requires the use of short focal length lenslets, which typically have a focal length between approximately 5 and 11 mm and preferably approximately 9.3 mm. - The focal lengths of the lenslets are chosen to be just short enough so as to provide an image that produces constructive interference between the two parallel electrically opposed pyroelectric elements. In some pyroelements the elements are in electrical series. Each individual pyroelectric element comprises a piezo-electric element. Preferably the polarity of the one is connected so as to oppose the polarity of the other so that when both are exposed to the same influence they mutually cancel. This feature enables the sensor to distinguish movement from ambient conditions. If the ambient condition is changing all lenslets on average sense the same. The diameter of the lenslets are then made as large as physically possible. Typically, the allowed diameter is constrained by the area of coverage required in the trunk area. Since one lens typically cannot cover the entire area,
multiple lenslets 1716 will be used that are located close to each other, similar to a fly's eye arrangement. The spacing of thelenslets 1716 is determined by the size of the image. The purpose is to allow a sufficient gap between the field of view in neighboring lenslets 1716 so that the image produces signals from the elements that add constructively. - The
lens 1713 arrangement typically looks similar to a fly's eye with between approximately 3 and 6lenslets 1716 across a diameter for a total number oflenslets 1716 from approximately 9 to 36. Thelenslets 1716 will typically be between approximately 5 and 15 mm in focal length with diameters of between approximately 2 and 10 mm. In order to sense objects in the 8-14 micron range, thelens surface 1720 material will typically be a form of polyethylene. This material requires that thelens surface 1720 have clear apertures that are less than approximately 1.5 mm thick and in the final product will be approximately 0.5 mm thick. - The amount of energy radiated by objects in the thermal area is not only proportional to temperature, but is also a function of the objects' emissivity. Thus even if objects in the trunk compartment and portions of the trunk compartment (where the objects in the trunk and portions of the trunk comprise background emissions) are at the same temperature, the objects and portions may not be emitting the same amount of energy. Since the sensors sense changes in the compartment, the fact that the background emissions (i.e., the objects and portions) may not be radiating uniformly, even when the objects and portions are at the same temperature, reduces the likelihood that a human being or pet will blend into the background and remain undetected. In order to take maximum benefit of this situation lenslets 1716 are suitably aimed at particular locations in the trunk which are known to have different emissivities. Preferable background items to aim the
lenslets 1716 at are trunk carpet, black plastic and metal objects as well as other portions or objects in the trunk compartment that have a relatively constant emission. - Alternatively, the
lenslets 1716 could be aimed at portions of the trunk compartment that typically do not reach the same temperature as the majority of objects in the trunk. For example, particular locations on the trunk carpet may be thermally coupled to various portions of the vehicle body resulting in a different equilibrium temperature than the majority of the carpeted area. A different equilibrium temperature typically results in a different radiative output. This variation in output reduces the uniformity of the background and reduces the likelihood that a child could blend into the background and not be detected by the sensor. One preferred trunk area to aim thelenslets 1716 is the spare tire compartment because of metal objects typically located there and a volume that forms a cavity. - Other features of the
lens 1703 include a continuous outeroptical surface 1720, spacing of thelenslets 1716, thin wall sections, a protective ribbing for the lens, varying lens apertures and focal lengths using aspherics, auxiliary lens features and using short focal length lenslets 1716 to increase stiffness. - Although refractive lens surfaces work in the trunk sensor application, alternatively, diffractive lens surfaces are also used instead of, or in conjunction with, refractive surfaces. A diffractive approach has the advantage of potential to balance-out chromatic aberrations. Thin lens sections would allow higher light transmission. Diffractive surfaces are easier to fabricate than they are for visible applications due to the larger diffractive surfaces used in the thermal infrared.
- Refractive Fresnels
- Fresnel lenses allow the introduction of thin lens sections for higher light transmission. Small Fresnel lenslets arranged in a roughly dome-shaped configuration are used.
- Continuous Outer Optical Surface
-
FIGS. 16A and 16B show alens 1703 with continuous outeroptical surface 1720 having a smooth outer surface which is defined mathematically, for instance, a conic section or a two-dimensional polynomial function. It is preferred for the optical portion of the outer surface not to contain any discontinuities in its derivative. This allows the relative alignment between the outer and inner lens surfaces to not be as critical, thus reducing the manufacturing cost. - Spacing of Lenslets
- The use of a dual-element detector in lens applications utilizes a particular lenslet arrangement. The primary purpose of the
lenslet 1716 is to provide a large detector field of view. Thelenslets 1716 are typically arranged so that the projections of the two detector elements do not overlap. Partial overlapping could cause a reduction in signal intensity and a complete overlap could substantially diminish the signal intensity. Thelenslets 1716 are typically arranged so that an object moving in any direction will first cross the field of view of one detector element and then the field of view of another detector element thereby providing a maximum signal.FIG. 17 shows the projection of the elements through a 15 lenslet design showing lenslets 1716(1) . . . (15). This arrangement has been optimized to detect horizontal and vertical movement. - Thin Wall Sections and a Large Optical Area
- The signal received by the detector elements is proportional to D2exp(−At) where D is the optical aperture diameter, A is a material constant, and t is thickness. Typically, in most optical designs the exponential term is insignificant. Most plastics do not transmit infrared light well. Polyethylene is an economically feasible plastic for the
lens 1720. In order to increase signal intensity, the lens thickness, t, must be as small as possible and the aperture diameter, D, as large as possible. If thelens surfaces 1720 are continuous surfaces, not Fresnel surfaces for instance, then the large D and small t parameters drive the lens edge thicknesses to be quite thin. Typical magnitudes for D are between approximately 3 mm and 6 mm and preferably about 4.3 mm. Typical magnitudes for t are approximately between 0.7 mm and 1.25 mm and preferably approximately 0.75 mm. - Protective Ribbing for Lens
- Due to the lens wall thickness, the
lens 1720 may need to be protected from damage. Referring toFIG. 15 , preferably this protection will be offered by thedevice housing 1710 since the housing will typically be made from a stronger plastic, for example, glass-reinforced nylon, or acetal. Thehousing 1710 will providethin ribs 1714 across the lens and partial ribs so as not to interfere with the lenslets fields of view. In this way the lens is protected from deformation by most items and forces that might otherwise destroy and/or distort the trunk sensor lens. - Variation of Lens Apertures and Focal Lengths
- As shown in
FIG. 17 , typically the trunk sensorinterior lens surface 1713 contains 15 separate the lenslets 1716(1) . . . (15). To remove cosine effects the lenslet apertures and/or focal lengths could be changed. Varying the focal lengths is a feasible solution but requires that the outer lens surface (shown aselement 1720 inFIGS. 16A and 16B ) be aspheric. - Use of Aspherics
- Using aspheric surfaces can reduce spherical aberration, which is a source of aberration effecting the lens performance. Also, arranging the
lenslets 1716 so that they form a geodesic dome shape increases lens stiffness and is compatible with an optimum lens arrangement. - Auxiliary Lens Features
- Since the
trunk sensor lens 1703 is typically fabricated from a pliable plastic, it is advantageous to include other mounting features and structures into it. Auxiliary features such as heat stake/orientation posts, a key-cap, and a mounting ring or plate facilitate mounting the sensor to either the trunk compartment or the passenger compartment of a vehicle. A mountingplate 1718 is shown inFIGS. 16A and 16B . - Focal Length Lenslets for Stiffness
- The
lenslet 1716 focal lengths not only effect the system's optical performance but its resistance to damage as well. Polyethylene, when used in thin wall sections (less than about 1.0 mm), is relatively pliable. The lens shape is designed to prevent lens damage. A hemispherical shape with a radius of about 12 mm or less increases lens strength, making it less vulnerable to damage when mounted in a car trunk. -
FIG. 18 shows an exploded view ofdetector 1513.Detector 1513 includesconnector 1512, alens cover 1510 and abase plate 1520.Lens cover 1510 andbase plate 1520 join together to form a housing. Alens 1516 attaches to thecover 1510. A printed circuit board (PCB) 1518 is sandwiched between thecover 1510 and thebase plate 1520. A clear button (on/off or panic) 1515 is used to activate or deactivate thedevice 1513. An LED (not shown) is situated behind thebutton 1515 so it illuminates thebutton 1515. Thecover 1510 conceals and protects theconnector 1512. Thelens 1516 is recessed in thecover 1510 so it is protected from inadvertent damage by luggage and other objects in the trunk. Mountingdevice 1522 is used to mount thedetector 1513 to a surface of a trunk compartment. - The printed circuit board (PCB) 1518 suitably has a memory associated therewith to record and store the behavior of the
device 1513. Thus, thedevice 1513 stores previous received signals and thereby decreases the possibility of a false alert situation because previous alarm conditions, i.e. state of peripheral modules, is stored in a memory onPCB 1518. - A specific embodiment of the present invention is shown in
FIG. 19 . The vehicle compartmentoccupancy detection system 2100 ofFIG. 19 comprises a vehicle compartmentoccupancy detection assembly 1513 and acompartment release 2114.Detection assembly 1513 detects the presence of a living occupant within a compartment and preferably determines such occupancy by detection of movement by living beings (such as a child or an adult or a pet) within the compartment. - Preferably, vehicle compartment
occupancy detection assembly 1513 comprises a thermal detector 1102 (such as a pyrodetector) that detects the differential in thermal energy generated by, for example, movement of a human having a body temperature typically at about 98.6 degrees Fahrenheit within the compartment. The ambient temperature within the compartment will mostly always be different than body temperature; for example, the air in a closed vehicle trunk compartment can reach a temperature of 150 degrees Fahrenheit, or higher, when parked in a hot climate, or as low as 20 degrees Fahrenheit, or lower, when parked in a cold climate.Thermal sensor 1102, most preferably a pyrodetector, monitors the thermal characteristic of the internal volume of the vehicle compartment (such as the trunk space in a vehicle trunk). -
Thermal sensor 1102 generates anoutput signal 2164 indicative of the thermal characteristic of the compartment space being monitored.Signal 2164 is indicative of the thermal characteristic of the compartment and is provided to acontrol module 1410, where it is processed to produce anoutput signal 2166 indicative of detection of occupant presence in the compartment.Signal 2166 causes actuation of compartment release 2114 (such as electrically powered retraction of a trunk lid latch to allow the trunk lid to open), thus allowing escape of the detected trapped occupant. - In an embodiment in which the compartment comprises a trunk of a vehicle, the vehicle compartment occupancy detection system comprises a passive trunk release system (PTRS). The passive trunk release system comprises a PTRS module as described in
FIG. 10 , that can be mounted within the trunk of a vehicle. Preferably, the PTRS module is mounted in the trunk at a location above the floor of the trunk in order to reduce potential damage from objects loaded into the trunk. Suitable trunk mounting locations include sidewalls, a front or a rear wall, the trunk lid that lifts when the trunk is opened and a trunk roof portion such as under the parcel shelf of the interior cabin. Locating the PTRS module at the trunk portion below the parcel shelf is a preferred location as this location is typically recessed and relatively stable to opening/closing of the trunk lid, yet provides a suitable field of view of the trunk interior. -
FIG. 20 illustrates an example of aPTRS detection module 1513. The vehicleoccupancy detection assembly 1513 comprises ahousing 2267, alens 1703, afilter 2275, as well asthermal sensor 1102 andcontrol module 1410.Lens 1703 is disposed in front ofthermal sensor 1102. -
Filter 2275 may be disposed betweenthermal sensor 1102 and lens 1703 (such as is shown inFIG. 20 ), or may be disposed in front oflens 1703. Also,filter 2275 may be part oflens 1703 such as a coating or a multilayer of coatings disposed on a surface oflens 1703. Further,filter 2275 can be formed as a component or composition oflens 1703, such as by including radiation absorbing and/or reflecting materials into the construction and/or composition oflens 1703 in order to form a filtering lens. As shown inFIG. 20 ,lens 1703 is coupled to filter 2275 viaconnector 2262.Filter 2275 is coupled tothermal sensor 1102.Thermal sensor 1102 is coupled to controlmodule 1410 viainterconnector 2252. -
Filter 2275 may also be an integral part of the mechanicalassembly constituting sensor 1102. - The spectral bandpass of
filter 2275 along with the spectral bandpass oflens 1703 is chosen so as to facilitate transmission of infrared radiation in a spectral bandwidth useful for pyrodetection of movement of a human body in a closed trunk compartment, but with a reduced transmission of incident radiation at wavelengths outside the wavelengths that carry the majority of radiation emitted by a living person. - The majority of the spectral output of a human body at 98.6 degrees Fahrenheit typically has a range between about 3 and 14 microns and peaks around 9.3 microns. Preferably, the spectral bandpass of the optical element such as
filter 2275 and/orlens 1703 is configured to be highly transmitting to the spectral signature generated by a human, and to reduce transmission of, or block, wavelengths outside this human characteristic signature so as to reduce the possibility of false triggers of vehicle compartment occupancy detection system such as the heating or cooling of walls of the compartment or thermal draughts caused by heated or cooled air movement in the compartment. - Also, the bandpass of the optical elements such as
filter 2275 and/orlens 1703 is preferably configured to optimize the spectral sensitivity ofthermal detector 1102. Filtering can be by absorbtive filtering and/or by reflective filtering. Typically, such filtering has a radiation transmission bandpass higher than about 8 microns and lower than about 14 microns; preferably between about 8.5 microns and 12 microns. Outside these spectral ranges,filter 2275 and/orlens 1703 is substantially non-transmitting so as to restrict the wavelengths of radiation incident onthermal sensor 1102 to those characteristic of a trapped occupant. Humans may also be detected at about a 3-5 micron range. -
Thermal detector 1102 is preferably a dual-element detector, preferably comprising two pyroelectric elements disposed side by side. One of the two pyro-elements is preferably electrically poled opposite to the other, and the elements are thermally isolated from one another. Both elements are typically established, coplanar, on a common substrate. - It is also an embodiment to place any suitable number of elements in parallel opposed format (i.e. 2, 4, 6, etc.). Such a configuration would increase sensitivity and decrease the likelihood of false alarms.
-
Lens 1703 preferably has a field of view and focal length selected to optimize detection of a child trapped within a closed automobile trunk compartment while minimizing the occurrence of system false triggers due to non-human generated thermal differentials. While the specific selection will vary from one vehicle trunk configuration to another, in general it is preferred thatlens 1703 have a field of view of at least about 40 degrees, more preferably at least about 70 degrees, and most preferably at least about 100 degrees. In general, the objective of the system optics is to provide comprehensive monitoring of the trunk compartment volume while obviating potential contributors to errant thermal signals such as from the heated or cooled walls of the trunk compartment. - It is also an embodiment to incorporate reflectors fabricated of, for example aluminum, gold or other suitable material, as known by those skilled in the art. Such reflectors increase the field of view for each sensor. This is desirable for interior applications.
-
Lens 1703 may comprise a single lens element or multiple lens elements, and may comprise a diffractive optical element and/or a refractive optical element. Preferably,lens 1703 comprises a wide angle lens and more preferably,lens 1703 comprises a plurality of lenslets arranged substantially hemispherically in front ofthermal sensor 1102. In such an arrangement of multiple lenslets formed as a canopy overthermal sensor 1102, any two lenslets can be viewing two spaced but closely adjacent locations within the interior volume of a closed vehicle trunk. Differentials in thermal characteristic between the two locations is thus sensed by the optics and dual-element pyrodetector of the vehicleoccupancy detection assembly 1513, and the presence of a child or equivalent body in the trunk compartment can be determined. By selecting the field of view and focal length of the individual lenslets, the internal volume of the trunk compartment can be preferentially monitored (a child will move in this volume) while minimizing thermal imaging of walls, floor panels and other portions of the compartment that potentially could contribute spurious thermal signatures leading to a false trigger event. - FIGS. 21(A) and 21(B) show two views of PTRS detection
unitary module 2413. An exploded view is shown inFIG. 21 (A) and a perspective view is shown inFIG. 21 (B). The components attach to an adapter plate ormount 2455 that secures to an inner surface of a vehicle trunk compartment, such as to a sheet metal section.Mount 2455 can attach by an adhesive, such as an adhesive strip, or by mechanical attachment such as by screws, bolts, fasteners or snaps. Abackplate 2465 attaches to mount 2455, preferably in a detachable fashion via fasteners or snaps so that thePTRS detection module 2413 is removable for replacement or service. Trunk constructions, and their interior surfaces, sizes and dimensions, vary from one vehicle model to another. Amount 2455 permits thedetection module 2413 to be mounted in a variety of locations. - The arrangement as illustrated in FIGS. 21(A) and 21(B) shows that the
mount 2455 can be customized for a particular vehicle model, but a standard and universally usable PTRSunitary detection module 2413 can be fabricated, and used in a wide variety of vehicle models by attaching to the customized mountingplate 2455 in a particular model. PTRSunitary detection module 2413 includes ahousing 2467 that accommodates a printedcircuit board 2470, which typically includes a thermal sensor and circuitry for a controller, as shown inFIG. 10 , a lens 2472, afilter 2475, connectors and sockets for electrical inputs and outputs and a user-operable button 2476 for deactivating the PTRSunitary detection module 2413, if desired, and/or for performing a system self-test function in order to verify that themodule 2413 is functional.Button 2476 is preferably backlit by a light source to aid visibility, especially at night, for example by a light emitting diode. - Preferably, lens 2472 is positioned in a crater formed by side-walls of
housing 2467 so that the lens 2472, and the thermal sensor disposed therebehind, is protected by the walls ofhousing 2467 from damage by objects stored or placed in the trunk. Also, by disposing the lens 2472 in a well formed by the walls ofhousing 2467, the field of view of lens 2472 can be restricted, and the lens/thermal sensor in themodule 2413 can be protected from spurious thermal draughts. - Optionally,
housing 2467 can disconnect frombackplate 2465 to allow service access to the thermal sensor and/or circuitry of the controller. Alternately,housing 2467 andbackplate 2465 can be sealed so that thePTRS detection module 2413 is sealed against water, dust, dirt and other debris. -
FIG. 22 shows system 2500 includingdetection device 2513, input modules and output modules.Detection device 2513 includes asensor 1102,analog signal processor 1472,controller 1410 anddrivers 1476.Sensor 1102 generates an alert signal and this signal is processed byanalog signal processor 1472.Controller 1410 includes amicrocontroller 2586, preferably based on a microprocessor or microcomputer.Controller 1410 receives the processed alert signal fromanalog signal processor 1472 viainterconnector 1451. -
Detection device 2513 receives various inputs. Aninput 1328 provides vehicle battery power (typical 12 volts DC, although higher battery voltages such as 42 volts are contemplated for use automobiles) todetection device 2513.Ignition input 1206 provides input from the vehicle ignition system should it be desired to operate the vehicle occupancy detection system while the vehicle engine is operating.Ignition input 1206 also provides a signal regarding the status of the engine.Trunk lid input 1326 provides a signal from the trunk lid indicative of whether the trunk lid is open or not. For example, a proximity switch such as a Hall probe or a spring-loaded closure switch is suitably provided on the trunk lid. If thetrunk lid input 1326 indicates that the trunk lid is open, then an input is provided todetection device 2513 that will disable its operation. This is useful when the vehicle is parked whereupon the PTRS module 2512 circuitry would be automatically activated and when the trunk lid is purposely opened by the vehicle owner to access the trunk. Upon opening the lid, thedetection device 2513 circuitry is automatically disabled, thus obviating inappropriate and unneeded repetitive actuation of the trunk release mechanism 2144 by thedetection device 2513 as the driver reaches into the trunk cavity to place or retrieve objects. -
Detection device 2513 is connected to alockout module 2561 viabidirectional interconnector 2562.Lockout module 2561 prevents inadvertent actuation of the trunkoccupancy detection system 2500 while the vehicle is in an operating state, such as driving on a highway, or when the engine is idling in traffic or idling when stopped at road-side. An example of a lockout circuit is disclosed in U.S. Pat. Nos. 5,371,659 and 5,669,704, both of which are hereby incorporated by reference in their entirety herein.Lockout circuit 2561 is responsive to the vehicle transmission being placed in gear viaPRNDL module 1104 as well as responsive to a sensor sensing the speed of the vehicle viaspeedometer module 1212. Thelockout circuit 2561 may also be included in the vehicle ignition system such that thedetection device 2513 is disabled when the engine is started and the vehicle is operating. Thus, thetrunk release mechanism 1114 and/or trunkoccupancy detection device 2513 will be disabled when the ignition switch is turned to “start”. - A lockout input is transmitted from a
lockout circuit 2561 todetection device 2513 viabidirectional interconnector 2562 and disables actuation of a trunk release signal and/or generation of a trunk occupancy control signal by thedetection device 2513. Thelockout module 2561 provides output viainterconnector 2562 by sensing when the vehicle ignition key is turned on, or other starter mechanism, to “ignition on” and starting the engine, or by placing the gear lever of the vehicle out of “PARK” gear, or by sensing motion of the vehicle using an accelerometer (preferably, an accelerometer, most preferably a solid-state accelerometer, packaged in thedetection device 2513 such as within the housing (not shown inFIG. 22 ). Thelockout module 2561 also suitably receives an input from avehicle computer 2590, viainterconnector 2591, indicating that the engine is operating, or receiving an input from a speedometer system, or setting the ignition system to “accessory on” status, or a speed or motion detection system, and detecting that the vehicle is exceeding a predetermined minimum speed (such as 5 miles per hour). - Provision of a
lockout signal 2562 preventstrunk release mechanism 1114 from actuating when the vehicle engine is operating or when the vehicle is powered and moving. Thelockout module 2561 is part of the vehicle compartment occupancy detection system as shown inFIG. 22 , and is beneficial in avoiding the possibility of false triggers, and undesired and unneeded release of the trunk lid under control of thedetection device 2513 while the vehicle is in motion on the highway, or when stalled, or operating in traffic, or when stopped but with the engine running. - The
detection device 2513 is provided with a user-operable button (button not shown inFIG. 22 ) that actuates a switch/disableinput 1324 to controller 2587 that can disable operation of the vehicle compartmentoccupant detection system 2500 should it be so desired in a particular circumstance. Examples of this include when the vehicle is being serviced. However, deactivation of thesystem 2500 in response to user-actuation of such aninput 1324 is preferably and desirably disabled whenever the trunk lid is closed and the vehicle is not operating under engine power. Thus, user-operation of such a button on thedetection device 2513 by a child trapped in a closed trunk compartment will not disable automatic release of thetrunk latch 1114 and opening of the trunk lid under control of thedetection device 2513. -
FIG. 23 shows a block circuit diagram ofsystem 2600. The diagram shows in greater detail the components discussed herein. -
Battery module 1328 andground module 1330 are coupled to power conditioning withreset circuit 2628 viainterconnectors reset circuit 2628 is coupled toprocessor 1410, viainterconnectors -
Ignition module 1206 is coupled to signalconditioning circuit 2606 viainterconnector 2636.Signal conditioning circuit 2606 is coupled toprocessor 1410 viainterconnector 2626. -
Trunk lamp 1139 is coupled to signalconditioning circuit 2649 viainterconnector 2639.Inputs conditioning circuit 2649 viainterconnector 2668.Signal conditioning circuit 2649 is coupled toprocessor 1410 viainterconnector 2659. -
Sensor 1102 is coupled to signalconditioning circuit 2602 viainterconnectors Signal conditioning circuit 2602 is coupled toprocessor 1410 viainterconnector 2652. -
Processor 1410 is coupled to signalconditioning circuit 2651 viainterconnector 2653.Signal conditioning circuit 2651 is connected to body control module (BCM) 1151 viainterconnector 2654. -
Processor 1410 is coupled to signalconditioning circuit 2609 viainter connector 2619. The output fromsignal conditioning circuit 2609 is received byLED indicator 1109. -
Processor 1410 is coupled to anoscillator 2612 viainterconnectors -
Processor 1410 is coupled to signalconditioning circuit 2624 viainterconnector 2634.Signal conditioning circuit 2624 is coupled to disableswitch 1324. -
FIG. 24 is a schematic diagram of thedetection system 2700. The connections described above are shown in greater detail inFIG. 24 . For example,trunk lamp 1139,lid switch input 1326 andsensor 1102 are coupled toprocessor 1410. Theprocessor 1410 is coupled toLED 1109 andBCM module 1151. The connection fromprocessor 1410 tooptional outputs 1119, as discussed above, are also shown. - Referring back to
FIG. 19 , the vehicleoccupancy detection system 2100 preferably incorporates various means to reduce the occurrence of false triggers that could cause release of a trunk lid by phenomena other than detection of a person or pet trapped in a closed vehicle compartment such as a trunk compartment. Such unnecessary and inappropriate false triggering of a trunk lid, can possibly cause inconvenience, security concerns and potential safety concerns. Thus, the vehicleoccupancy detection system 2100 suitably includes one or more false trigger reduction means to reduce and/or substantially eliminate the occurrence of unwarranted opening a trunk lid by false triggering of the vehicle occupancy detection system. - Examples of vehicle occupancy detection system false trigger protection include mechanical vehicle occupancy detection system false trigger protection, thermal isolation vehicle occupancy detection system false trigger protection, filtering vehicle occupancy detection system false trigger protection, electrical/electronic vehicle occupancy detection system false trigger protection, optical vehicle occupancy detection system false trigger protection, analog vehicle occupancy detection system false trigger protection, digital vehicle occupancy detection system false trigger protection, computational vehicle occupancy detection system false trigger protection, mathematical vehicle occupancy detection system false trigger protection, algorithmic vehicle occupancy detection system false trigger protection and secondary vehicle occupancy detection system false trigger protection.
- Mechanical vehicle occupancy detection system false trigger protection includes for example, placement of a PTRS module on a vehicle trunk wall portion, or preferably a vehicle trunk roof portion such as under a parcel shelf of the rear window region of the interior vehicular cabin, so as to be protected/insulated from heating/cooling effects of the vehicle sheet body metal or other vehicle components and not readily subject to impact from mechanical objects being placed into the trunk, being removed from the trunk, or moving about in the trunk. Mechanical vehicle occupancy detection system false trigger protection means also include recessing the lens (and thermal sensor therebehind) in a well or trough formed by the walls or other structures of the housing of PTRS module. Placing the thermal detector/lens in a crater formed by such walls provides protection from mechanical impact for the lens that could potentially initiate a false trigger and the walls provide mechanical protection against thermal draughts and other thermal abnormalities.
- Thermal isolation vehicle occupancy detection system false trigger protection means include thermally isolating thermal the sensor (shown as
element 1102 inFIG. 20 ) and the lens (shown aselement 1703 inFIG. 20 ) from the heating and cooling of the vehicular body, such as the vehicular sheet metal, by mounting, in a housing that attaches, such as shown inFIG. 21 , to an inner surface of a trunk compartment, but with the lens/thermal sensor, spaced from, and thermally isolated from the attachment point and thus from the vehicle body.Housing 2467 shown inFIG. 21 (A) preferably provides a substantially isothermal thermal cage for thermal sensor shown inFIG. 20 aselement 1102. -
FIG. 25 shows adetector device 2813 with a sensor 2802 afilter 2875, alens surface 2803 and anair gap 2821. Theair gap 2821 is a pocket of air between thelens surface 2803 and thefilter 2875 that prevents a rapid change of temperature experienced by thesensor 2802. - Filtering vehicle occupancy detection system false trigger protection means include optical filtering and electrical or electronic or computational or mathematical or algorithmic or analog or digital filtering.
- Optical filtering encompasses restricting the bandwidth of radiation incident on the thermal sensor to a spectral bandwidth emitted by a living body (typically from approximately 8 microns to 14 microns of the electromagnetic radiation spectrum). Since a living body will be at a relatively narrow temperature range for example, a human is typically 98.6 Fahrenheit but in cases of hypothermia or hyperthermia, potentially a slight variation of typically one to three degrees Fahrenheit. Use of infrared filters to reject radiation of spectral wavelength outside those wavelengths emitted by a living body reduces false triggers from movement or changes in temperature of heated or cooled vehicle body panels or compartment walls, and from movement or changes in temperature of objects in the vehicle, such as groceries loaded into a trunk compartment, trunk compartment local hot and cool spots, which phenomena are likely to have an emittance spectrum different from that of a human body, and thus be filtered by the filter absorbers and/or reflectors provided by
filter 2275 and/orlens 1703 shown inFIG. 20 ). - Optical vehicle occupancy detection system false trigger protection means include selection of a lens structure, field of view and/or focal length that provides wide and adequate monitoring of a vehicular compartment, and particularly of any region in a vehicular trunk compartment where a frightened child might be located while reducing thermal imaging of regions and parts of the compartment, (such as vehicle body walls) more likely to contribute thermal signatures that could confuse and/or hinder determination of a true occupant presence signal by the controller.
- Filtering, such as electrical or electronic or computational or mathematical or algorithmic or analog or digital filtering, reduces false triggers and encompasses analysis by the controller of the signal output of a thermal sensor to determine a signal component frequency and/or amplitude that is indicative of movement of a living body within a vehicle compartment. This signal component frequency is distinct from other signal components in the output of a thermal sensor that are at signal frequencies and/or amplitudes that are different from the signal frequency and/or amplitude characteristic of a living body. For example, a child moving within a closed trunk compartment will create a thermal differential signal as detected by a thermal sensor that will be typically at a frequency of at least about 0.15 to 10 Hertz whereas a grocery bag with frozen grocery items that are thawing or heated items that are cooling, will change its thermal signature at a rate different than the rate of thermal change created by a moving person in the compartment. The living person indicative thermal signal can be isolated and/or enhanced for example by analog signal processing; digital signal processing; signal enhancement or filtering by computer algorithms, by mathematical signal processing and by similar techniques.
- Additionally, bandpass filters can be adjusted to avoid the vehicle frequency. This will reduce false alarms while still being sensitive to human movement. Inanimate objects are subject to the resonant frequency of each vehicle. Thus, a notch filter could be used that is adjusted to each vehicle.
- Electrical or electronic vehicle occupancy detection system false trigger protection includes signal averaging, signal accumulation, signal verification and signal enhancement by analog, digital and mathematical and/or algorithmic and/or computational techniques. For example, controller can await detection of a confirmatory trapped occupant indicative signal or a plurality of trapped occupant indicative signals (such as, for example, confirmation of receipt of a minimum number of “viable” signals, for example at least three “viable” signals, in a determined time interval, for example 5 seconds or longer) before the controller generates an output signal to a trunk latch mechanism to open a trunk lid.
- The controller can include pre-stored signal profiles indicative of “viable” signals that would be attributable to a trapped occupant and false signals attributable to non-occupation signals, such as for example heating or cooling grocery bags or items falling over in a trunk, would be attributable to trunk body heating and cooling. Actual signals being processed by the controller can be compared, such as by computational comparison, to stored signals in order to determine a true occupant detection signal and to reduce the incidence of false triggers.
- A learning function can be included in the controller whereby the controller learns the normal thermal signatures experienced in a vehicle trunk used throughout the four climatic seasons in a variety of geographic locations. The presence of a trapped occupant is a rare event, and so the vehicle occupancy detection system, having learned what is normal for that particular compartment in that particular vehicle, will more readily recognize and react to the signal signature of a trapped living person or pet. Thus, a dynamic vehicle compartment occupant detection false trigger reduction system is provided that is adaptive to the thermal conditions experienced in a particular vehicular compartment, such as the trunk of a particular automobile.
- An alternative form of a dynamic vehicle compartment occupant detection false trigger reduction system comprises providing an input to the controller that is indicative of the outside and/or compartment temperature. For example, a temperature sensor such as a thermocouple or thermistor can be included in the PTRS module in order to detect the air temperature in the compartment. Alternately, a temperature input can be provided from another location in the vehicle, such as via a car area network (also referred to as controlled area network), that provides information to the controller as to the outside temperature, the interior cabin temperature and/or the vehicle compartment temperature. The controller can determine, for example, the difference between the temperature of the trunk compartment and that expected of a human body (about 98.6 degrees Fahrenheit). If the magnitude of the temperature difference is substantial such as may occur when a trapped event occurs in a cold climate where the trunk interior will be cold relative to body temperature or such as may occur when the trapped event occurs in a hot climate where the trunk interior will be hot relative to body temperature, the sensitivity and reaction of the controller can be set accordingly. However, should the air temperature of the trunk compartment be very close to or equal to the body temperature of the body trapped therein, then detection of body presence by detection of the differential in temperature between that body and the trunk compartment is more challenging as that differential may, in such circumstance, be only a fraction of a degree Fahrenheit such as 0.5 degrees Fahrenheit, or smaller.
- The temperature, and hence thermal emission signature, of a living body such as a human body is not the same over the entire body and can vary, for example, from the face to a hand or a leg, or even from one part of a leg to another part of a leg. Clothes may also have a different emissivity temperature compared to exposed body parts such as a head or a hand. Temperature differences can be small, lower than about 1 degree Fahrenheit, and for example, less than about 0.1 degrees Fahrenheit. Thus, when the temperature of the vehicular compartment is close to or at body temperature, the sensitivity of vehicle compartment occupancy detection system is desirably high so that it is sensitive to detecting small changes in temperature, and preferably is at a thermal differential sensitivity of about 5 degrees Fahrenheit or lower, more preferably at a thermal differential sensitivity of about 1 degree Fahrenheit or lower, most preferably at a thermal differential sensitivity of about 0.5 degrees Fahrenheit or lower. The thermal differential sensitivity of the vehicle compartment occupancy detection system can be set so that it reacts to release of a trunk latch only when a pre-determined temperature differential is detected such as for example, triggering of a latch release when a temperature differential of about 10 degrees Fahrenheit or less is detected or, for a more sensitive system, triggering of a latch release when a temperature differential of about 5 degrees Fahrenheit or less is detected, or for an even more sensitive system, triggering of a latch release when a temperature differential of about 1 degree Fahrenheit or less is detected, or for a very sensitive system, triggering of a latch release when a temperature differential of about 0.5 degrees Fahrenheit or less is detected.
- Alternatively, instead of providing a fixed thermal differential sensitivity for the vehicle compartment occupancy detection system, a dynamic thermal differential sensitivity can be provided for the vehicle compartment occupancy detection system. This includes, for example, an algorithmic vehicle occupancy detection system false trigger protection system or a mathematical vehicle occupancy detection system false trigger protection system or a computational vehicle occupancy detection system false trigger protection system or an analog and/or digital electronic vehicle occupancy detection system false trigger protection system. These dynamically change the thermal differential sensitivity for the vehicle compartment occupancy detection system, and other characteristics of the controller, in response to actual inputs to the controller in response to the occurrence of a given event in a particular vehicle compartment. Thus, for example, should a temperature input to the controller indicate that the ambient temperature in the compartment is close to or equal to body temperature, then a higher thermal sensitivity can be selected by the controller for example, a thermal differential sensitivity of about 1 degree Fahrenheit may be chosen, preferably in conjunction with another false trigger reduction means such as utilization of a more stringent “viable” signal verification routine that requires a higher number of event detection signals in a pre-determined time period or a longer duration can be chosen before an output to release a latch is given to raise a trunk lid.
- The false trigger protection and/or reduction system of the vehicle compartment occupancy detection system may also include analog and/or digital circuitry that assists in distinguishing an occupant thermal signature from other non-occupant indicating signals detected by a thermal sensor. For example, use of an electrical lockout circuit, as described above, ensures that a false trigger event cannot occur while the vehicle is operating. Also, the false trigger protection and/or reduction system of the vehicle compartment occupancy detection system may include secondary vehicle occupancy detection system false trigger protection means.
- For example, a microphone may be provided as part of PTRS module or may be mounted elsewhere in the vehicular compartment for use in conjunction with thermal sensor and as part of the vehicle compartment occupancy detection system. The microphone is suitably positioned to detect sounds within the closed compartment. The output of the microphone is processed by the controller to distinguish human vocal sounds and also suitably pet sounds from other non-occupant sounds in a vehicle. The controller distinguishes a vocal signal from ambient noise by analog and/or digital filtering that is configured to identify that a person is shouting or screaming in the compartment. Techniques such as digital sound processing can be used to enhance the vocal signal to background noise ratio, as described in commonly assigned U.S. patent application, Ser. No. 09/449,121, filed Nov. 24, 1999, titled REARVIEW MIRROR ASSEMBLY WITH UTILITY FUNCTIONS, by Hutzel et al. of Donnelly Corporation, now U.S. Pat. No. 6,428,172 (Attorney Docket: P-778), and Ser. No. 09/585,379, filed Jun. 1, 2000 by Hutzel et al. and entitled REARVIEW MIRROR ASSEMBLY WITH UTILITY FUNCTIONS (Attorney Docket: P-817), the entire disclosures of which are hereby incorporated by reference herein.
- An audio system such as a sound processing system used in conjunction with a pyrodetector can be used to distinguish human (or pet) made sounds or frequencies or patterns from other sounds audible in the trunk of a vehicle, such as outside traffic noise, the sound of a grocery bag falling over, loose objects rolling or moving on a trunk floor. The microphone described above as
element 1144 inFIGS. 8 and 11 , or vocal sound detection system can augment the pyrodetection system and provide a confirmation that a person is present in the closed trunk. - Alternately, the audio system provided in the trunk or other closed vehicular compartment such as the interior cabin space can serve as a primary occupant detection device, such that a trunk lid will release when a microphone or audio processing system determines the presence of a human voice in a closed compartment. Additional occupant detectors are suitably used to augment the thermal sensor in order to reduce false trigger events, or alternatively replace the thermal sensor as the system occupant detector and serve as a stand-alone occupant detector, or serve as the primary occupant detector and with a pyrodetector to augment it in order to reduce false trigger occurrences. Other sensing mechanisms, include bolometers, camera systems such as CCD or CMOS-based digital camera systems, ultrasonic detection systems, and radar detection systems.
- Where camera systems are used, it is desirable to use an in-trunk compartment illumination means to light-up the closed compartment for viewing by the camera. For example, a trunk light described as
element 1139 inFIGS. 8 and 10 above, can illuminate thereby allowing the camera to capture an image of the trunk interior. Since such interior lights typically consume significant electrical current, it is preferred that this illumination be a momentary illumination for a brief period for example, between 1 and 5 seconds or shorter, depending on the exposure needs of the camera and the rate of illumination of the light source so as to conserve battery power. It is preferable to use non-incandescent, low-power, solid-state light sources such a light emitting diodes such as are described in commonly assigned U.S. patent application, Ser. No. 09/449,121, filed Nov. 24, 1999, titled REARVIEW MIRROR ASSEMBLY WITH UTILITY FUNCTIONS by Hutzel et al. of Donnelly Corporation, now U.S. Pat. No. 6,428,172 (Attorney Docket: P-778) and in commonly assigned U.S. patent application, Ser. No. 09/585,379, filed Jun. 1, 2000 by Barry W. Hutzel et al. and entitled REARVIEW MIRROR ASSEMBLY WITH UTILITY FUNCTIONS (Attorney Docket: P-817), the entire disclosures of which are hereby incorporated by reference herein. - Cameras and camera field of view illuminators, including near-IR emitting light emitting diodes (LEDs), suitable for use in the present invention are disclosed in U.S. Provisional Pat. Applications, Ser. No. 60/186,520, filed Mar. 2, 2000 by Lynam et al. for INTERIOR REARVIEW MIRROR ASSEMBLY INCORPORATING A VIDEO SCREEN, and Ser. No. 60/218,336, filed Jul. 14, 2000 by Lynam et al. for INTERIOR REARVIEW MIRROR ASSEMBLY INCORPORATING A VIDEO SCREEN (Attorney Docket DON01 P-831), which are hereby incorporated herein by reference in their entireties. As described above in
FIG. 9 above, The PTRS module, which typically is a very low current device, can be constantly monitoring the trunk space while the vehicle is parked. If the PTRS module suspects the presence of a trapped occupant, then optionally an additional trunk space monitoring device (such as a microphone or a camera or the like) is activated by the PTRS module to perform a confirmation of occupant presence. - Since the vehicle compartment occupancy detection system will operate while the vehicle is parked, it is desirable that vehicle battery drain be minimized. Preferably, for the 12 volt battery vehicles commonly used, the desired current drain for the vehicle compartment occupancy detection system (including the thermal sensor and any associated electronic circuitry) is less than about 10 milliamps, preferred is less than about 5 milliamps, more preferred is less than about 1 milliamp, and most preferred is less than about 0.5 milliamps. A low-current pyrodetection system, suitable for automobile compartment use while a vehicle is parked, is disclosed in commonly assigned U.S. patent application, Ser. No. 08/901,929, filed Jul. 29, 1997, titled AUTOMOTIVE PYROELECTRIC INTRUSION DETECTION SYSTEM by Teowee et al. of Donnelly Corporation, now U.S. Pat. No. 6,166,625, the entire disclosure of which is hereby incorporated by reference herein.
- The PTRS module, when used with vehicles with a higher battery voltage such as 42 volts, the current drain may be 0.1 milliamps, or lower. Since, even the smallest current draw by the vehicle compartment occupant detection system will eventually drain the vehicle battery if the vehicle is parked long enough and other vehicular accessories such as security systems, keyless entry systems and the like may drain the battery of a parked vehicle even before any such drain by the vehicle compartment occupant detection system. Thus, the vehicle compartment occupant detection system suitably includes a vehicle low battery detect and/or response system. This low battery detection is activated by an input from the vehicle battery, shown as
element 1328 inFIG. 11 above. Input from the battery module (1328) causes the PTRS module to generate an output to an indicator indicating a low battery situation. - The vehicle compartment occupant detection system such as the passive trunk release system described herein is used in conjunction with an active trunk release system such as the manually-operated trunk release handle disclosed in commonly assigned U.S. patent application, Ser. No. 09/275,565, filed Mar. 24, 1999, titled SAFETY HANDLE FOR TRUNK OF VEHICLE, by Bingle et al. of Donnelly Corporation, now U.S. Pat. No. 6,086,131, Ser. No. 09/516,831, filed Mar. 1, 2000 by Bingle et al. for SAFETY RELEASE FOR A TRUNK OF A VEHICLE, now U.S. Pat. No. 6,390,529, and Ser. No. 09/605,233, filed Jun. 28, 2000 by Bingle et al. for SAFETY HANDLE FOR TRUNK OF VEHICLE, now U.S. Pat. No. 6,254,261 (Attorney Docket DON01 P-824), the entire disclosures of which are hereby incorporated by reference herein.
- Providing both an active and a passive occupant escape system in the same trunk further enhances compartment safety. Also, not all vehicle trunks are provided with a powered (typically by an electrically actuated solenoid or the like) trunk release latch, and in such vehicles, provision of an active trunk release such as by pulling a lever, handle or other release mechanism located in the trunk space is necessary to allow trunk escape. Also, active trunk release systems such as the manually-operated trunk release handle disclosed in the above-referenced patent applications, preferably have lighted handles or the like that illuminates for a period after the trunk lid is initially closed following a trunk closure (but ceases to illuminate after a time-out period in order to conserve battery power). This lighted handle is re-illuminated should it be touched or pulled in order to aid and encourage a child or similar trapped occupant to pull the handle to release the trunk lid and escape. When such a lighted safety handle is used in conjunction with a vehicle compartment occupancy detection system, the PTRS module, upon detection of person movement within the trunk space, can provide an output as discussed herein that illuminates the user-operable manual trunk lid release handle or other device provided in the trunk compartment. When the manual trunk handle light is not inclusive of light sources for self-illumination, then the output may illuminate a trunk space light provided in the trunk space compartment, which is preferably, a special purpose light source such as a single or a cluster of high intensity, directed, low-current, non-incandescent compact light emitting diodes or a electroluminescent strip which are suitably mounted as part of PTRS module.
- Alternately, the trunk light is suitably, incandescent, which is commonly provided to illuminate trunk spaces.
- Preferably, such lights, once initiated to illuminate by the PTRS module, cease to illuminate after a timed out period for example 30 to 60 minutes or even longer. Also, preferably, the controller includes circuitry, to monitor the state of charge of the vehicle battery. As the vehicle battery runs down, its output voltage declines. Once the controller determines that the state of charge of the vehicle battery has declined to a point close to it not having sufficient charge to power a trunk release latch and so open a trunk lid, the PTRS module can optionally provide a trunk release output to the trunk lid release latch and cause the trunk to open before the battery drains beyond a point capable of powering a trunk release event. The PTRS module also disables the trunk latch from allowing the trunk lid to engage closed again. Although the trunk will then be open presenting a potential theft opportunity, the vehicle is safe against children being trapped in the trunk. Given that such an event only normally occurs when a vehicle is parked or abandoned for an unusually long extended period, child safety concerns may warrant having the trunk lid open to a child-safe open position should the battery drain over time. Further, if desired, an auxiliary battery source for the occupant escape system, such as by provision of a back-up battery, preferably rechargeable via a vehicle exterior mounted solar panel, can be utilized.
- Further, the PTRS module and/or the handle of any active manually actuatable trunk release handle can include a simulated or recorded voice generator, that outputs a message (preferably a multilingual message such as “Please stay calm” or “Please push the lid up” or “Please pull the handle to escape” that encourages, calms and instructs a trapped occupant. Preferably, a solid-state voice chip, such as is commonly used in toys is used. Such a voice-generation chip is useful with a stand-alone active trunk release handle, such as the system disclosed in U.S. patent application, Ser. No. 09/275,565, filed Mar. 24, 1999, titled SAFETY HANDLE FOR TRUNK OF VEHICLE by Bingle et al. of Donnelly Corporation, now U.S. Pat. No. 6,086,131, and Ser. No. 09/605,233, filed Jun. 28, 2000 by Bingle et al. for SAFETY HANDLE FOR TRUNK OF VEHICLE, now U.S. Pat. No. 6,254,261 (Attorney Docket DON01 P-824), the entire disclosures of which are hereby incorporated by reference herein.
- Also, since the PTRS module is particularly installed to assist escape of children from closed trunk compartments, preferably any automatic, electrically-operated trunk lid release latch is adapted so that the trunk lid readily and visibly raises so that a child will realize that escape is possible by pushing, with minimum effort, the opened trunk lid.
- The controller, as described above includes an output that provides a variety of driver/logic outputs to various devices and accessories. Trunk release output provides an output to release the trunk latch and open the trunk lid. The trunk release output is typically provided to a trunk release controller in the vehicle that normally is activated by the driver or another interior cabin occupant actuating a trunk release button located such as in the glove compartment of the interior cabin. The vehicle trunk release controller typically powers a solenoid equipped trunk latch.
- Alternately, the trunk release output can be provided to a vehicular computer that controls various vehicular functions, including release of the trunk latch (either by direct wire link or via a local area network in the vehicle. Optionally, once the controller of PTRS module has determined that an occupant is present in the closed vehicular compartment, output of the trunk release signal may be delayed for a short pre-determined period, for example five minutes. In certain instance involving carjackings and kidnappings, persons have been locked into trunks of vehicles. In such circumstances, provision of a trunk release delay on the trunk release output is preferred to allow the victim of the crime be placed into the trunk but to delay automatic opening of the trunk by the vehicle compartment occupant detection system for a short period preferably longer than about 1 minute, more preferably longer than about 3 minutes, in order to allow time for the criminal to move away from the trunk and so enable the victim escape, once the trunk lid ultimately releases at the end of the duration of the trunk release delay, unnoticed by the criminal. However, the trunk release delay should not be so long in duration as to cause undue stress to a trapped occupant under more normal circumstances where criminal activity is not involved. Thus, the duration of trunk release delay should preferably be no longer than about 15 minutes and more preferably be no longer than about 10 minutes. A trunk release delay in the 2-8 minute range is most preferred.
- Also, the controller can include a power driver that provides a powering current to the trunk release latch to cause it to release the trunk lid. Such direct powering of the trunk release from the PTRS module is particularly beneficial for aftermarket installations of a powered trunk release latch. The controller can also provide an output that sounds the vehicle horn and/or flashes the vehicle lights to signal that a person is trapped in the trunk. It is preferred that the horn be sounded and/or the vehicle exterior lights be flashed in a manner that is unique and distinguishing for trunk occupancy.
- For example, detection by PTRS module of a person trapped in the trunk could cause the horn to repetitively sound in the Morse code “SOS” pattern of three shorter duration horn soundings (each of equal short time duration) immediately followed by three distinctly longer duration horn soundings (again each of equal longer time duration) followed by three shorter duration horn soundings and so on and so on in order to audibly simulate, via the car horn, the “3 dot-3 dash-3 dot” Morse code for SOS, that is widely recognized as signaling an emergency event. Similarly, and preferably simultaneously with the sounding of the car horn, the vehicle exterior lights flash in a “3 short flash-3 long flash-3 short flash” repetition to signal an emergency event in response to detection by the PTRS module of an occupant trapped in the vehicle. This is of particular benefit when the trunk lid is not electrically releasable. The sounding of the horn pattern and/or flashing of the lights pattern can be customized depending on the country that the vehicle is used. For example, people in different countries may recognize different patterns as a distress signal. The actual signals output can be programmed to correspond to a recognized distress signal of various countries.
- The vehicle compartment occupancy detection identifier signal should be chosen to be different and distinct from such as a theft/security/intrusion alarm horn sounding/lights flashing. When the presence of an occupant trapped in the trunk is determined by the PTRS module, the vehicle compartment occupancy detection system preferably causes the vehicle horn to sound and/or lights to flash in a manner that is recognizable as being different from such as a car alarm activating, and in a manner that the public at large can recognize as a trunk occupancy detection event. The Morse “SOS” pattern is a preferred vehicle compartment occupancy detection identifier signal that can alert that a person is trapped in a vehicular trunk or another vehicular compartment; however another distinctive tone, frequency and/or intensity pattern can be adopted as the vehicle compartment occupancy detection identifier signal.
- The PTRS module may also have an output to an indicator light in the vehicle cabin. For example, once the ignition of the vehicle is turned on, PTRS module may initiate a self-check. If it be properly functioning, an indicator, such as a backlighted icon or an LED or the like, flashes for a short time period, for example 5 to 10 seconds, to indicate to the operator that the PTRS module is capable of operating properly. If, however, the PTRS module is malfunctioning, the controller suitably provides an output to a vehicle occupancy detection system malfunction indicator which can illuminate in the vehicle cabin, visible to the operator, indicating a system malfunction. Placement of such indicator displays at or on the interior rearview mirror assembly is preferred, as looking at the rearview mirror is typically part of the driving task, and so a compartment occupancy system malfunction indication display, placed at or on the interior rearview mirror assembly, is readily visible to the operator. For example, an information display can be provided at the reflective element, at the bezel of the mirror case or attached to a mirror support or mount such as is disclosed in commonly assigned, U.S. patent application, Ser. No. 09/396,179, filed Sept. 14, 1999, titled INDICATOR FOR VEHICLE ACCESSORY by DeLine et al. of Donnelly Corporation, now U.S. Pat. No. 6,278,377, the entire disclosure of which is hereby incorporated by reference herein. As an alternative to placing the indicator at the interior rearview mirror assembly, trunk occupancy detection indicators can be placed at or on either or both of the exterior rearview mirror assemblies. Other in-cabin locations are also possible, such as in the dash or in an overhead console.
- Also, detection of a child trapped in a trunk compartment by the automatic occupancy sensing systems as described herein can be optionally wirelessly transmitted from the vehicle to a remote site such as via a telematic wireless automotive telecommunication system. For example, the controller may suitably provide an output to a vehicular wireless transmitter such as a cellular phone system or an ONSTAR™ telematic telecommunication system from General Motors Corporation or RESCU™ available from Ford Motor Company, such as disclosed in commonly assigned U.S. patent application, Ser. No. 09/275,565, filed Mar. 24, 1999, titled SAFETY HANDLE FOR TRUNK OF VEHICLE by Bingle et al. of Donnelly Corporation, now U.S. Pat. No. 6,086,131, U.S. patent application, Ser. No. 09/605,233, filed Jun. 28, 2000 by Bingle et al. for SAFETY HANDLE FOR TRUNK OF VEHICLE, now U.S. Pat. No. 6,254,261 (Attorney Docket DON01 P-824), and in U.S. patent application, Ser. No. 09/449,121, filed Nov. 24, 1999, titled REARVIEW MIRROR ASSEMBLY WITH UTILITY FUNCTIONS by Hutzel et al. of Donnelly Corporation, now U.S. Pat. No. 6,428,172, the entire disclosures of both are hereby incorporated by reference herein. Acting in response to this output, a call can automatically be place via the in-vehicle telecommunication system to the emergency services or the like alerting that a person or pet is trapped in a vehicle compartment such as a trunk. Since such cellular phone type transmissions will be traceable as to the geographic origin of the call the location of the vehicle where the compartment occupancy entrapment event is occurring can be traced, and help can be dispatched. If the vehicle is already equipped with a global positioning system (GPS), then upon receipt of the output alerting of a trunk entrapment, the GPS data specifying the present geographic location of the subject vehicle can be transmitted by the vehicle telecommunication system to the alert rescue authorities as to the location of the vehicle and to summon help.
- Changes and modifications in the specifically described embodiments can be carried out without departing from the principles of the invention, which is intended to be limited only by the scope of the appended claims, as interpreted according to the principles of patent law.
Claims (43)
1. A safety system for a compartment of a vehicle, said safety system comprising:
an occupant sensor for sensing an occupant within the compartment of the vehicle;
a vehicle-based control, said control being responsive to said occupant sensor;
a wireless transmitter of the vehicle, said control controlling transmission by said wireless transmitter, said wireless transmitter transmitting to a receiver located external of the vehicle upon detection by said occupant sensor of the presence of an occupant within the compartment of the vehicle; and
said receiver comprising at least one of (a) a remote keyless entry device associated with the vehicle and (b) an external communication device.
2. The safety system of claim 1 , wherein said occupant sensor senses within the interior cabin of the vehicle.
3. The safety system of claim 1 , wherein said receiver comprises a remote keyless entry device associated with the vehicle.
4. The safety system of claim 1 , wherein said receiver comprises an external communication device.
5. The safety system of claim 1 further comprising a temperature sensor for sensing a temperature within the compartment of the vehicle, said wireless transmitter transmitting to said receiver in response to said temperature sensor sensing a temperature within the compartment of the vehicle that is at or above a threshold temperature.
6. The safety system of claim 1 further comprising a second sensor, wherein a sensing by said second sensor confirms detection of the occupant within the compartment.
7. The safety system of claim 6 , wherein sensing by said second sensor is triggered by a sensing by said occupant sensor, wherein said system operates at a lower electrical current when sensing via said occupant sensor than when sensing via said second sensor.
8. The safety system of claim 6 , wherein one of said occupant sensor and said second sensor comprises at least one of a capacitive sensing element, a resistive sensing element, a thermal sensing element, a pressure sensing element, a thermopile sensing element, an imaging element, a radar sensing element, an ultrasonic sensing element, a gas sensing element, a bolometer and a thermal imaging element.
9. The safety system of claim 1 , wherein said occupant sensor comprises at least one of a capacitive sensing element, a resistive sensing element, a thermal sensing element, a pressure sensing element, a thermopile sensing element, an imaging element, a radar sensing element, an ultrasonic sensing element, a gas sensing element, a bolometer and a thermal imaging element.
10. The safety system of claim 1 further comprising false trigger protection means.
11. The safety system of claim 10 , wherein said false trigger protection means comprises a position of said occupant sensor that reduces the effect of thermal abnormalities within the compartment.
12. The safety system of claim 10 , wherein said false trigger protection means comprises restricting the bandwidth of radiation incident on said occupant sensor to be within a spectral bandwidth indicative of a living body.
13. The safety system of claim 1 further comprising at least one alert device operable to generate at least one alert in response to said control.
14. The safety system of claim 13 , wherein said at least one alert device generates at least one alert selected from the group consisting of flashing at least one light of the vehicle, activation of a siren, activating a horn of the vehicle, and activating a LO-Jack™ system.
15. A safety system for a compartment of a vehicle, said safety system comprising:
an occupant sensor for sensing an occupant within a compartment of the vehicle;
a vehicle-based control, said control being responsive to said occupant sensor;
a wireless transmitter of the vehicle;
a remote device external of the vehicle, said remote device comprising a receiver;
said wireless transmitter transmitting to said receiver upon detection by said occupant sensor of the presence of an occupant within the compartment of the vehicle;
said remote device indicating to a person external of the vehicle the presence of an occupant within the compartment of the vehicle in response to said transmission; and
said safety system comprising false trigger protection means.
16. The safety system of claim 15 , wherein said occupant sensor senses within the interior cabin of the vehicle.
17. The safety system of claim 15 , wherein said remote device comprises a remote keyless entry device associated with the vehicle.
18. The safety system of claim 15 , wherein said remote device comprises an external communication device.
19. The safety system of claim 18 , wherein said remote device comprises a telephone.
20. The safety system of claim 15 further comprising a temperature sensor for sensing a temperature within the compartment of the vehicle, said wireless transmitter transmitting to said receiver in response to said temperature sensor sensing a temperature within the compartment of the vehicle that is at or above a threshold temperature.
21. The safety system of claim 15 further comprising a second sensor, wherein a sensing by said second sensor confirms detection of the occupant within the compartment.
22. The safety system of claim 21 , wherein sensing by said second sensor is triggered by a sensing by said occupant sensor, wherein said system operates at a lower electrical current when sensing via said occupant sensor than when sensing via said second sensor.
23. The safety system of claim 21 , wherein one of said occupant sensor and said second sensor comprises at least one of a capacitive sensing element, a resistive sensing element, a thermal sensing element, a pressure sensing element, a thermopile sensing element, an imaging element, a radar sensing element, an ultrasonic sensing element, a gas sensing element, a bolometer and a thermal imaging element.
24. The safety system of claim 15 , wherein said occupant sensor comprises at least one of a capacitive sensing element, a resistive sensing element, a thermal sensing element, a pressure sensing element, a thermopile sensing element, an imaging element, a radar sensing element, an ultrasonic sensing element, a gas sensing element, a bolometer and a thermal imaging element.
25. The safety system of claim 15 , wherein said false trigger protection means substantially limits transmission by said wireless transmitter to detection of an occupant within the compartment.
26. The safety system of claim 15 , wherein said false trigger protection means comprises a position of said occupant sensor that reduces the effect of thermal abnormalities within the compartment.
27. The safety system of claim 15 , wherein said false trigger protection means comprises restricting the bandwidth of radiation incident on said occupant sensor to be within a spectral bandwidth indicative of a living body.
28. The safety system of claim 15 further comprising at least one alert device operable to generate at least one alert in response to said control.
29. The safety system of claim 28 , wherein said at least one alert device generates at least one alert selected from the group consisting of flashing at least one light of the vehicle, activation of a siren, activating a horn of the vehicle, and activating a LO-Jack™ system.
30. A safety system for a compartment of a vehicle, said safety system comprising:
an occupant sensor for sensing an occupant within a compartment of the vehicle;
a vehicle-based control, said control being responsive to said occupant sensor;
a wireless transmitter of the vehicle;
a remote device external of the vehicle, said remote device comprising a receiver;
said wireless transmitter transmitting to said receiver upon detection by said occupant sensor of the presence of an occupant within the compartment of the vehicle;
said remote device indicating to a person external of the vehicle the presence of an occupant within the compartment of the vehicle in response to said transmission, said remote device comprising at least one of (a) a remote keyless entry device associated with the vehicle and (b) an external communication device; and
said safety system comprising false trigger protection means, said false trigger protection means substantially limiting transmission by said wireless transmitter to detection of an occupant within the compartment.
31. The safety system of claim 30 , wherein said occupant sensor senses within the interior cabin of the vehicle.
32. The safety system of claim 30 , wherein said remote device comprises a remote keyless entry device associated with the vehicle.
33. The safety system of claim 30 , wherein said remote device comprises an external communication device.
34. The safety system of claim 33 , wherein said remote device comprises a telephone.
35. The safety system of claim 30 further comprising a temperature sensor for sensing a temperature within the compartment of the vehicle, said wireless transmitter transmitting to said receiver in response to said temperature sensor sensing a temperature within the compartment of the vehicle that is at or above a threshold temperature.
36. The safety system of claim 30 further comprising a second sensor, wherein a sensing by said second sensor confirms detection of the occupant within the compartment.
37. The safety system of claim 36 , wherein sensing by said second sensor is triggered by a sensing by said occupant sensor, wherein said system operates at a lower electrical current when sensing via said occupant sensor than when sensing via said second sensor.
38. The safety system of claim 36 , wherein one of said occupant sensor and said second sensor comprises at least one of a capacitive sensing element, a resistive sensing element, a thermal sensing element, a pressure sensing element, a thermopile sensing element, an imaging element, a radar sensing element, an ultrasonic sensing element, a gas sensing element, a bolometer and a thermal imaging element.
39. The safety system of claim 30 , wherein said occupant sensor comprises at least one of a capacitive sensing element, a resistive sensing element, a thermal sensing element, a pressure sensing element, a thermopile sensing element, an imaging element, a radar sensing element, an ultrasonic sensing element, a gas sensing element, a bolometer and a thermal imaging element.
40. The safety system of claim 30 , wherein said false trigger protection means comprises a position of said occupant sensor that reduces the effect of thermal abnormalities within the compartment.
41. The safety system of claim 30 , wherein said false trigger protection means comprises restricting the bandwidth of radiation incident on said occupant sensor to be within a spectral bandwidth indicative of a living body.
42. The safety system of claim 30 further comprising at least one alert device operable to generate at least one alert in response to said control.
43. The safety system of claim 42 , wherein said at least one alert device generates at least one alert selected from the group consisting of flashing at least one light of the vehicle, activation of a siren, activating a horn of the vehicle, and activating a LO-Jack™ system.
Priority Applications (1)
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US09/275,565 US6086131A (en) | 1999-03-24 | 1999-03-24 | Safety handle for trunk of vehicle |
US09/484,754 US6480103B1 (en) | 1999-03-24 | 2000-01-18 | Compartment sensing system |
US09/516,831 US6390529B1 (en) | 1999-03-24 | 2000-03-01 | Safety release for a trunk of a vehicle |
US09/605,233 US6254261B1 (en) | 1999-03-24 | 2000-06-28 | Illuminated safety handle for opening the trunk of a vehicle from inside |
US09/648,560 US6485081B1 (en) | 1999-03-24 | 2000-08-25 | Safety system for a closed compartment of a vehicle |
US10/301,315 US6783167B2 (en) | 1999-03-24 | 2002-11-21 | Safety system for a closed compartment of a vehicle |
US10/930,195 US7097226B2 (en) | 1999-03-24 | 2004-08-31 | Safety system for a compartment of a vehicle |
US11/510,978 US20060290518A1 (en) | 1999-03-24 | 2006-08-28 | Safety system for a compartment of a vehicle |
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Also Published As
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US7097226B2 (en) | 2006-08-29 |
US20050023858A1 (en) | 2005-02-03 |
US6783167B2 (en) | 2004-08-31 |
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