EP1014325A1 - Improvements in anti-intrusion systems against false-alarms - Google Patents
Improvements in anti-intrusion systems against false-alarms Download PDFInfo
- Publication number
- EP1014325A1 EP1014325A1 EP99121151A EP99121151A EP1014325A1 EP 1014325 A1 EP1014325 A1 EP 1014325A1 EP 99121151 A EP99121151 A EP 99121151A EP 99121151 A EP99121151 A EP 99121151A EP 1014325 A1 EP1014325 A1 EP 1014325A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensors
- sensed
- possibility
- false alarms
- intrusion systems
- 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.)
- Withdrawn
Links
Images
Classifications
-
- 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
- G08B29/185—Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system
- G08B29/188—Data fusion; cooperative systems, e.g. voting among different detectors
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
Definitions
- the invention relates to an improvement in anti-intrusion systems against the possibility of false alarms, which is obtained through the elaboration of the signals that come from sensors adopting the same technology.
- the invention as is characterized by the claims, solves the problem by means of an improvement in the anti-intrusion systems by which the possibility that false alarms take place is excluded by utilizing sensors having the same technology, but with covering diagrams oriented towards different directions.
- the advantages achieved according to the present invention lie essentially in that the systems are simpler and more homogeneous, the circuits and the related wire harnesses are easier to be realized and assembled, and also the calibration of the sensors of the same type is easy.
- Figure 1 is a plan general layout of a vehicle provided the concerned anti-intrusion system.
- Each transducer is able to sense anti-intrusion attempts.
- the alarm signaling is obtained in opposed conditions with respect to conventional methods. If two or more sensors having the same technology signal a breaking with the same intensity, the latter is considered as an environment disturbance; if on the contrary, the movement is sensed by one only sensor, while on the other one or ones it is not signaled or is much less sensed, the real alarm system is transmitted to the station. The elaboration of the signals is carried out carefully by an electronic station, so as to discriminate with certainty the intrusions from the false alarms caused by environment factors.
- the principle on which the intrusion sensing is based is that of the acoustic response, in the case of ultrasound transducers, of the driver's cab.
- Each sensor emits impulse trains at an ultrasonic frequency of a limited and defined duration.
- each sensor acts as a receiver for the ultrasonic waives reflected by the walls and the obstacles that are present in the driver's cab (6) of the vehicle (5).
- each transducer can store an "acoustic image" of the environment, meaning that the echoes of the impulse train have different shape and amplitude.
- the suitable elaboration of the signals allows therefore to sense the aforesaid intrusion attempt.
- the method subject matter of the present invention consists in the real time examination of the responses obtained from all sensors; the simultaneous elaboration of such signals allows to easily discriminate an intrusion attempt from a false alarm.
- An environment variation in fact, is sensed in a similar manner by all the sensors of the system; in the case under examination, by four transducers applied in the inside of the vehicle (5). The same holds good for the disturbances coming from the outside.
- the sensor (1) directly involved receives as an echo of the transmitted signal an "acoustic image" very different from the previously stored one, in rest condition; sensors (2) and (3) will be, instead, little affected by the same disturbance, while sensor (4), even though involved, will sense much less the disturbance.
Abstract
An anti-intrusion alarm system is constituted by a plurality of
sensors having the same technology, but a covering diagram
oriented towards different directions. Such configuration allows
alarm signaling in opposite conditions with respect to
conventional methods. If two or more sensors signal a breaking
with the same intensity, the same is considered as an environment
disturbance; if on the contrary, it is sensed by one only sensor,
while on the other one or ones it is not signaled or is much less
sensed, the real alarm signal is transmitted to the station.
Description
- The invention relates to an improvement in anti-intrusion systems against the possibility of false alarms, which is obtained through the elaboration of the signals that come from sensors adopting the same technology.
- As is known, in order to prevent the possibility of false signals, double technology sensors are used in the most updated and sophisticated anti-intrusion alarm systems, such as for instance passive IR sensors and microwave sensors, combined with each other. By this concept, in fact, the alarm is transmitted only if the different sensors sense intrusion attempts within a limited time interval and, because of the very fact that the technology employed is different, it is unlike for a simple disturbance to involve all sensors, and the possibility of false alarms due to external factors are minimum. However, it is evident that in the realization of such systems, the combination of the different technologies, the mixed circuit composition, the wiring harnesses of the components having different characteristics and the regulation and/or calibration of the different sensitivities of the sensors, require special attention and contrivances as well as specific experiences and impose longer and more expensive operating times.
- Object of the present invention is to obviate the above drawbacks. The invention, as is characterized by the claims, solves the problem by means of an improvement in the anti-intrusion systems by which the possibility that false alarms take place is excluded by utilizing sensors having the same technology, but with covering diagrams oriented towards different directions.
- The advantages achieved according to the present invention lie essentially in that the systems are simpler and more homogeneous, the circuits and the related wire harnesses are easier to be realized and assembled, and also the calibration of the sensors of the same type is easy.
- The invention is described with more details in the following, according to an embodiment solely given by way of non limiting example, with reference to the attached drawing, wherein: Figure 1 is a plan general layout of a vehicle provided the concerned anti-intrusion system.
- In the figure, the system is described with reference to a particular, non limiting, application of the same on vehicles (5).
- Its is composed of four sensors, such as for instance ultrasound transducers (1, 2, 3 and 4) applied on a vehicle (5). Each transducer is able to sense anti-intrusion attempts. By said configuration, the alarm signaling is obtained in opposed conditions with respect to conventional methods. If two or more sensors having the same technology signal a breaking with the same intensity, the latter is considered as an environment disturbance; if on the contrary, the movement is sensed by one only sensor, while on the other one or ones it is not signaled or is much less sensed, the real alarm system is transmitted to the station. The elaboration of the signals is carried out carefully by an electronic station, so as to discriminate with certainty the intrusions from the false alarms caused by environment factors.
- In substance, the principle on which the intrusion sensing is based is that of the acoustic response, in the case of ultrasound transducers, of the driver's cab. Each sensor emits impulse trains at an ultrasonic frequency of a limited and defined duration.
- Between an impulse train and the subsequent one, each sensor acts as a receiver for the ultrasonic waives reflected by the walls and the obstacles that are present in the driver's cab (6) of the vehicle (5). In this way, each transducer can store an "acoustic image" of the environment, meaning that the echoes of the impulse train have different shape and amplitude. The suitable elaboration of the signals allows therefore to sense the aforesaid intrusion attempt.
- Depending on the possible environment variations due to heat, cold or humidity or the disturbances coming from the outside of the vehicle (5), such as those produced by rain, wind, hail or various noises, the system might result to be easily subject to false alarms, unless the sensitivity to variations of the responses of the sensors is drastically reduced.
- Instead, the method subject matter of the present invention consists in the real time examination of the responses obtained from all sensors; the simultaneous elaboration of such signals allows to easily discriminate an intrusion attempt from a false alarm. An environment variation, in fact, is sensed in a similar manner by all the sensors of the system; in the case under examination, by four transducers applied in the inside of the vehicle (5). The same holds good for the disturbances coming from the outside.
- If, on the contrary, the disturbance is caused by a real breaking attempt, for instance originating by the shattering of the glass or the forcing of the left front door lock, the sensor (1) directly involved receives as an echo of the transmitted signal an "acoustic image" very different from the previously stored one, in rest condition; sensors (2) and (3) will be, instead, little affected by the same disturbance, while sensor (4), even though involved, will sense much less the disturbance.
- Vice-versa, in case of rain, all sensors result to be equally "disturbed" by the corresponding noise produced by water hitting the metal body of the vehicle (5), and the variations in the "acoustic image" are similar and comparable.
- By means of an adequate elaboration of the signals received by the electronic station and coming from all sensors, it is possible to discriminate the breaking attempts from false alarms.
- In relation with what has been described for the particular application on vehicles, it is obvious that the same working principle can be easily adopted, in the same way and for the same purposes, utilizing two or more sensors employing a technology equal to the one previously described, or also with sensors using different technologies. In the same way, two or more sensors employing any known suitable technology may be adopted either for the protection of moving means, such as motor-cars and/or the like, and for the protection of fixed means, such as for instance houses, rooms and the like.
- Even though the invention has been described and illustrated according to an embodiment solely given by way of non limiting example, it will be obvious to those skilled in the art that many modifications in the forms, details, orientations, combinations and assemblies may be introduced without for this falling outside its scope and aim.
Claims (5)
- Improvements in anti-intrusion systems against the possibility of false alarms, characterized in that it is obtained through the elaboration of the signals coming from equally calibrated sensors, that adopt the same technology but are arranged according to covering diagrams oriented towards different directions.
- The improvements in anti-intrusion systems against the possibility of false alarms according to claim 1, characterized in that the possibility that false alarms take place is excluded by the adoption of sensors having the same technology but covering diagrams oriented towards different directions, and in that alarms signals are obtained in opposite conditions with respect to the conventional methods.
- The improvements in anti-intrusion systems against the possibility of false alarms according to claims 1 and 2, characterized in that signals having the same intensity, sensed by two or more sensors, correspond to an environment disturbance.
- The improvements in anti-intrusion systems against the possibility of false alarms according to claims 1-3, characterized in that to a real breaking a signal corresponds that is sensed by a sensor with an intensity different from the signals sensed by other sensors: said signal is not sensed or is much less sensed by the other one or ones sensors of the system.
- The improvements in anti-intrusion systems against the possibility of false alarms according to claims 1-4, characterized in that the train of sensors which adopt the same technology utilizable for the constitution of anti-intrusion systems subject matter of the invention are of the ultrasound, passive IR, microwave type, or any other suitable type.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITRE980127 IT1305345B1 (en) | 1998-12-14 | 1998-12-14 | IMPROVEMENT IN BURGLAR ALARM SYSTEMS AGAINST FALSE ALARMS |
ITRE980127 | 1998-12-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1014325A1 true EP1014325A1 (en) | 2000-06-28 |
Family
ID=11399331
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99121151A Withdrawn EP1014325A1 (en) | 1998-12-14 | 1999-10-22 | Improvements in anti-intrusion systems against false-alarms |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1014325A1 (en) |
IT (1) | IT1305345B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10239087A1 (en) * | 2002-08-26 | 2004-03-11 | Delphi Technologies, Inc., Troy | Indoor surveillance method and system |
US7986228B2 (en) | 2007-09-05 | 2011-07-26 | Stanley Convergent Security Solutions, Inc. | System and method for monitoring security at a premises using line card |
US8248226B2 (en) | 2004-11-16 | 2012-08-21 | Black & Decker Inc. | System and method for monitoring security at a premises |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3620030A1 (en) * | 1986-02-20 | 1987-08-27 | Megamos F & G Sicherheit | Arrangement for monitoring an essentially closed room |
US5424711A (en) * | 1990-07-27 | 1995-06-13 | Siemens Aktiengesellschaft | Ultrasonic monitoring system for the interior of a motor vehicle |
US5471195A (en) * | 1994-05-16 | 1995-11-28 | C & K Systems, Inc. | Direction-sensing acoustic glass break detecting system |
-
1998
- 1998-12-14 IT ITRE980127 patent/IT1305345B1/en active
-
1999
- 1999-10-22 EP EP99121151A patent/EP1014325A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3620030A1 (en) * | 1986-02-20 | 1987-08-27 | Megamos F & G Sicherheit | Arrangement for monitoring an essentially closed room |
US5424711A (en) * | 1990-07-27 | 1995-06-13 | Siemens Aktiengesellschaft | Ultrasonic monitoring system for the interior of a motor vehicle |
US5471195A (en) * | 1994-05-16 | 1995-11-28 | C & K Systems, Inc. | Direction-sensing acoustic glass break detecting system |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10239087A1 (en) * | 2002-08-26 | 2004-03-11 | Delphi Technologies, Inc., Troy | Indoor surveillance method and system |
US8248226B2 (en) | 2004-11-16 | 2012-08-21 | Black & Decker Inc. | System and method for monitoring security at a premises |
US7986228B2 (en) | 2007-09-05 | 2011-07-26 | Stanley Convergent Security Solutions, Inc. | System and method for monitoring security at a premises using line card |
US8531286B2 (en) | 2007-09-05 | 2013-09-10 | Stanley Convergent Security Solutions, Inc. | System and method for monitoring security at a premises using line card with secondary communications channel |
Also Published As
Publication number | Publication date |
---|---|
IT1305345B1 (en) | 2001-05-04 |
ITRE980127A1 (en) | 2000-06-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6765491B1 (en) | Distance detecting device | |
US5309144A (en) | Proximity sensing security system | |
US6987707B2 (en) | Method and system for in-air ultrasonic acoustical detection and characterization | |
US5629690A (en) | System and method of installation for locating a hidden sensor externally active on a motor vehicle | |
CA2029089A1 (en) | Intrusion detection system | |
US6631096B2 (en) | Method and apparatus for detecting intrusion and non-intrusion events | |
US5764136A (en) | Ultrasonic detection system for safety of vehicle passengers | |
FR2828741B1 (en) | OBSTACLE DETECTION DEVICE AND ASSOCIATED COMMUNICATION DEVICE | |
US5229748A (en) | Monitoring system for monitoring the window panes of an interior, for example a motor vehicle interior | |
JPS61501230A (en) | Test equipment for intrusion alarms | |
JPH08175333A (en) | Method and device for monitoring interior space of car | |
US6326886B1 (en) | Ultrasound distance measuring system with digital measuring signals transmitted by time multiplexing | |
GB2111679A (en) | Sonar intruder detectors | |
EP1014325A1 (en) | Improvements in anti-intrusion systems against false-alarms | |
EP0446385B1 (en) | Ultrasonic surveillance system for intruder detection | |
US4695985A (en) | Apparatus for preventing a roundabout of supersonic wave in a supersonic wave transmitter and receiver for a vehicle | |
EP1225456A2 (en) | System and method for the monitoring of a space surrounded by walls | |
GB2240847A (en) | Sonar surveillance system for shallow water | |
US6157293A (en) | Device for detecting the intrusion of a body in a predetermined space | |
Regtien et al. | A low-cost sonar system for object identification. | |
EP1095828A2 (en) | Intruder detection system for a motor vehicle | |
JP3202865B2 (en) | Parent-child station mutual danger recognition type ultrasonic transceiver | |
JPH0529178Y2 (en) | ||
JPH04186186A (en) | Double mode ultrasonic alarming machine | |
KR20010056696A (en) | Device and method for measuring distance using ultrasonic waves |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
AKX | Designation fees paid |
Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20001229 |