FIELD OF THE INVENTION
This application is a continuation-in-part of prior application Ser. No. 09/896,159, filed Jun. 28, 2001, the entire contents of which are hereby incorporated by reference.
- BACKGROUND OF THE INVENTION
This invention relates generally to a utility usage control system, and more particularly to a means of obtaining real-time utility consumption readings and also managing utility consumption by signaling for the control of end-use devices from a computer or personal digital assistant (PDA).
There are various types of automatic meter reading devices (AMR) which use optical light-sensing arrangements to provide remote utility readings for determining utility consumption and for billing purposes. These devices were typically developed as a cost-effective alternative to the existing meter reading methods and devices. For example, these AMR devices avoid having a person walk or drive from establishment to establishment and manually read each meter. However, the majority of methods using optical light-sensing devices are installed inside the existing meter and/or require professional installation. Thus, a skilled or trained individual must physically remove the glass housing present on such meter in order to install the automatic reading device. This process is inefficient and also very costly for either the utility company or the consumer.
In U.S. Pat. No. 5,767,790, the device utilizes a photoelectric sensor for reading the watt-hour indicator of electricity service usage. A light source beams a light on a rotating disk in the meter. The disk reflects the light except for one darkened area, which absorbs the beam of light. The reflected light is sensed by the photoelectric sensor and a pulse is sent each time the reflected light is not sensed. Each pulse indicates one full rotation of the disk. All of the computing elements of the monitor system are contained within the utility watt-hour meter housing, and even the glass cover is replaced with a polycarbonate cover. Other similar devices installed within the existing meter housing are disclosed in U.S. Pat. No. 4,327,362 and U.S. Pat. No. 5,506,404. A significant disadvantage typical of these devices is that the installation process requires the existing meter to be physically opened and/or the optical light sensing arrangement to be assembled with professional assistance. Thus, an ordinary consumer generally cannot set up the device, and therefore consumers would have to bear installation costs.
In U.S. Patent No. 5,559,894, a camera is used to read the indicia of a plurality of dials. This automatic meter reader device is integrated into a substantial housing structure and requires a substantial effort to install. This device uses Optical Character Recognition (OCR) to read the serial number of the meter but does not specify such OCR use to read utility consumption data. In addition, this method and device requires alignment and perhaps continuous realignment in order to accomplish its task, thus rendering it costly to use and costly to maintain.
In U.S. Pat No. 5,880,464, infrared light sensors are used to detect the shadow of a meter pointer against a meter face to enable the meter reader to determine consumption rates. This automatic meter reader device is placed on the cover of the watt-hour meter. However, the device requires the angle and heights of the light source and sensor to be adjusted in a specific manner using a height adjustment carrier having a collar that must be tightened, which a typical customer most likely would find difficult to accurately adjust. Furthermore, no provision is made for powering the device and thus further installation problems may be created for the consumer.
There are also certain utility-based applications in which a network controller or some other headend device located in a utility company interrogates the automatic meter reading device, in order to find out the utility usage for billing purposes. Typical drawbacks that are inherent in these systems are that customers cannot see their use in real-time, cannot access this information except when a billing statement is received and, cannot see data except in the standard format chosen by the utility company.
- SUMMARY OF THE INVENTION
In addition, there are various types of readers that can be utilized to manage the consumption of electrical power or fossil fuels. U.S. Pat. No. 6,167,389 allows the consumer, through the use of adapted end-use devices, to program these devices based on a pricing-tier billing system. The pricing-tier billing system sets a billing rate for power consumption based on the load levels on a power grid. A utility company may use a billing system with four-tiers: Normal Load, Medium Load, High Load, and Critical Load. Each tier has a different billing rate for power consumption with the Critical Load tier charging at the highest rate. The utility company may transmit data packets though an open network from a centralized headend to gateways at customer locations. These data packet cause the gateways to generate random startup time offsets, to control when end-use devices will be started. This is useful to protect the power grid from being loaded such that it results in a blackout. However, this system does little to provide feedback to the consumer, let alone provide them with real-time data on their use and cost that allows the consumer to directly shed load voluntarily or with incentive, in order to help the utility balance its load demands. Further, it requires either a full start or stop operation of equipment rather than a gradual increase or decrease of individual loads. Thus, this device is primarily aimed at providing grid-level control to a utility but does little to help a consumer manage their consumption in a gradual and comfortable manner.
The present invention provides an electro-optical, automatic meter reader (AMR) for enabling a consumer to view and manage utility-based consumption on a computer, which may be any form of microprocessor-based computer or PDA. Such utility based product being consumed may be electrical power, natural gas, water or other products and services. The automatic meter reader is an apparatus for optically reading a meter using a sensor that can be used to monitor electricity consumption. A sensor of the apparatus may be attached to a bracket, which may be mounted to the outside cover of the meter. An installation process of the apparatus need not require modification of the existing meter nor require removal of the housing of the existing meter. An end-user may install the automatic meter reader without special skills or tools, in fact, with no additional hardware other than those included as a part of the system.
The photoelectric sensor beams a light onto a rotating disk, visible on the face of the meter, whose surface reflects the light. A marker such as a black dot or line placed on the rotating disk absorbs the beamed light resulting in an interval where a lower level of light is being reflected. The photoelectric sensor counts these intervals, representing the number of turns the disk rotates indicating utility usage during a given time period. The apparatus connects to a data-collection unit through an Input/Output (I/O) port. The data-collection unit stores the data from the sensor. The I/O port connection may also serve to supply power for the apparatus through one otherwise unused pin of that serial connector being assigned as a power carrier, thus avoiding the need for a dedicated power supply. The data collection unit may also be used to store data when the computer is turned off and can be powered by an external 12 volt DC power supply.
Alternatively, if the meter includes a digital or seven-segment display, the automatic meter reader may monitor the value displayed by the meter by monitoring the state of each segment or, a subset of those segments associated with the display.
The data-collection unit connects through a second I/O port, to the computer. The computer provides the consumer and utility with the ability to either directly or remotely view and manage his consumption. The computer collects the data and provides information relating to utility-based consumption such as real-time rate of usage and historical usage levels. For example, information is arranged in three graphs that are analogous to information common to automobile travel. These include the real-time rate-of-use, comparable to the speedometer of an automobile. This graph tells the user their consumption rate on an instantaneous basis at the present moment. The second graph, a time-segment-based graph for displaying quantity vs. time data, is comparable to the trip odometer. This graph shows the user their consumption on a day-to-date, daily, month-to-date, or other calendar-based time basis. It may also display utility or other time-based segments such as peak period, summer, Mondays, etc. The final graph is comparable to the general odometer. It shows the total energy consumption through the life of the system. Each graph can be displayed in units of measurement of the appropriate utility. For example, kilowatt hours for electric utilities, therms for natural gas utilities and gallons for water utilities. In addition, each graph may provide an alternate display in dollars or other forms of currency. By presenting this data in three logical and understandable formats, Data can be used to forecast whether the consumer will be under his specified usage or cost level of consumption. Such forecasts are commonly used by trip computers in automobiles to tell the consumer whether they should adjust their speed to reduce fuel consumption, when they will arrive at their destination based upon present and average speed, and how many miles they have to go to complete their trip.
In the present invention, if the forecast indicates that the present usage rate will cause that consumer to exceed the baseline unit or cost level, a signal is sent from the computer to enable the manual or automatic control of usage of devices to assure that they end the time segment below the specified requirement, especially during energy or water crisis situations. A forecast rate for use is shown for the consumer as a red colored line on each graph. A second line, the rate of consumption that must be averaged in order to arrive at or under the base line, is also displayed on each graph. If a consumer is averaging under their baseline amount, for the period in question, the bar for that particular graph shall show as a green bar. If the consumer is averaging over the baseline amount for the period in question, the bar for that particular graph shall show as a red bar. For example, if the consumer is averaging a rate of consumption use on a daily basis that will exceed the monthly baseline level if continued for the rest of the cycle, the monthly bar shall show as red. If the consumer is averaging a rate of consumption on an hourly basis that will exceed the average daily baseline, that day's bar shall show as red in color. If the consumer is averaging a rate of consumption on a peak-period basis that will exceed the average baseline, that segment's bar shall show as red in color. In this way the consumer is always aware of their status to achieve baseline levels for the hour, day, and month or any time segment used by a utility or chosen by the consumer.
BRIEF DESCRIPTION OF THE DRAWINGS
Further, the consumer or utility may program the computer to automatically control the rate of utility-based consumption. A number of commonly available products accept control commands including thermostats, lighting, dimmers, appliances, valves and other items. Thus, the computer may alert such devices through automatic commands to, for example, adjust the thermostat on an air conditioning unit in response to the forecast. In addition, a communication system, such as the Internet, can also be utilized to allow the computer to communicate to the utility company for usage, control and billing purposes or to allow both the consumer and utility to access and manage consumption from a remote computer or PDA.
The present invention will now be described in more detail with reference to preferred embodiments of the invention, given only by way of example and illustrated in the accompanying drawings in which:
FIG. 1 illustrates a block schematic diagram of an apparatus for reading and managing power consumption in accordance with the present invention;
FIG. 2A provides an illustrated embodiment of the reader in a plan view;
FIG. 2B provides an illustrated embodiment of the reader in a side sectional view;
FIG. 3A depict the bracket attached to a conventional meter in a front view;
FIG. 3B depict the bracket attached to a conventional meter in a side view;
FIG. 4 is an illustration of a preferred sensor;
FIG. 5A provides an illustration of a conventional utility meter with a digital display;
FIG. 5B provides an illustration of a conventional utility meter with dial indicators;
FIG. 5C is an illustration of a digital display that may be found in the meter of FIG. 5A;
FIG. 5D is an illustration of an individual seven-segment numeric indicator;
FIG. 5E is an illustration of a one embodiment of a sensor, which may be used to detect the value of the seven-segment indicator;
FIG. 5F is an illustration of one embodiment of a fiber optic sensor and the digital indicator;
FIG. 6 illustrates a user interface displayed on the screen of the computer;
FIG. 7 is an illustration of the computer connected to power consuming device through a serial port or Ethernet interface of the computer;
FIG. 8 provides an illustration of the computer connected to a communication system for remote access to the data stored and compiled on the computer; and
FIG. 9 illustrates an alternative embodiment of the present invention using wireless communication to transmit the data obtained by the reader.
FIG. 1 illustrates a block schematic diagram of an apparatus 100 for reading and managing power consumption in accordance with the present invention. As shown in FIG. 1, a reader 104 is attached to a typical utility meter 102 such as an analog or digital power meter commonly found on homes, apartment buildings and commercial buildings. The reader 104 provides a means for automatically reading power consumption and may eliminate the need for manually reading the meter 102. The data generated by the reader 104 may be continuously transferred through a connection such as a serial cable 120, to a data collection unit 106 or alternatively directly to the monitoring device 110, such as a computer.
The data collector 106 is therefore optional. When provided, the data collection unit stores data generated by the reader 104. The data collection unit 106 may store data for a limited time when the monitoring device (computer) 110 is shut off or in the event of a power failure. With appropriate memory, the unit 106 may be able to store data for up to a year. The preferred embodiment of the data-collection unit 106 for a household may include a single serial port interface from the reader 104, such as a RJ-11 or RJ-45 and a single serial port out, to the computer 110, such as a DB-9. The preferred data-collection unit 106 is approximately 2″ wide and 3″ long and includes a 12 volt input, such as from a wall mounted AC to DC converter 108. A battery, such as a standard watch battery, may be provided for backup. Further, the data collection unit 106 may be powered by the serial driver of one pin on the serial port of the computer. The preferred data-collection unit 106 includes a microprocessor such as a PIK Microprocessor including non-volatile memory and a timer crystal. It will be apparent that any microprocessor or controller could be used.
In a preferred application of the invention where multiple power meters are monitored, such as an apartment building or a commercial building, may be similar to the household application described above. However, the data collection unit 106 may be provided with inputs for additional readers 104, such as four to eight inputs and an optional Ethernet connector for networking to a single monitoring device 110.
The preferred embodiment of the monitoring device 110 may be a conventional general-purpose computer system or a serial server containing one or more serial ports and an Ethernet port, and need not be specific to this application. The monitoring device 110 receives the data from a cable 118, such a serial cable, which connects directly to the reader 104. Alternatively, a cable 116 may be a serial cable connecting to the optional data-collection unit 106 through a serial port in, such as a RJ-45 or RJ-11 connector and a serial port out, such as a DB-9 connector. The monitoring device 110 will not lose information during power failure as it stored its data in non-volatile memory and real-time data is only gathered when power is present and being consumed. In addition, when employed, the data collector 106 will not lose its data during an outage because it holds historic values in non-volatile memory and real-time data is only gathered when power is present and thus, being consumed.
The monitoring device 110 may be connected to a communication system 112 or network, such as the Internet to allow remote access 114 of the data. For example, a utility company may obtain the data for billing purposes or by the end-user who wants to control his power consumption from his PDA or computer from a remote location, such as his office.
FIGS. 2A and 2B provides an illustrated embodiment of the reader 104 in both a plan view (FIG. 2A) and a side sectional view (FIG. 2B). The reader 104 includes a bracket 202 and a sensor 210 such as a photoelectric sensor. The bracket 202 preferably is a unitary body and lacks movable parts thus being relatively cost effective and also being easy to install. The preferred material for the bracket 202 is either rubber or plastic but it may be made out of any suitable material. Included in the bracket 202 may be an aperture 208 for accepting the sensor 210. The sensor 210 may be threaded into a nut 216 attached to the meter 102. For example, the nut 216 may be plastic and secured using glue or epoxy to the meter face. The nut 216 may fit into a recessed portion 218 of the bracket 202. In addition, a heat and moisture dissipation channel 212 may be included to allow ventilation of the heat generated by the sensor 210. The heat generated from the sensor 210 may be used to melt ice in cold-weather climates in which case melted ice may escape through the channel 212. In addition, the channel 212 acts as a temperature equalization path between the sensor 210 and the outside elements, thus preventing the fogging of the lens in the sensor aperture 406. The bracket 202 may also incorporate a fastener 204 and 206, for example a hook and loop such as Velcro or double-sided tape or other adhesive to attach to the meter 102. As illustrated in FIG. 2B, the back of the bracket 202 may follow the same contour as the meter 102 to ensure proper alignment and secure mounting to the meter.
FIGS. 3A and 3B depict the bracket 202 attached to a conventional meter 102 in both a front view (FIG. 3A) and also a side view (FIG. 3B). The bracket 202 may attach to the translucent (typically glass), outside cover 306 of the meter 102 conventional to most existing electric utility meters. As mentioned above, the shape 214 of the bracket 202 may follow the same contour as the translucent outside cover 306 of the existing meter 102 ensuring proper alignment with the existing meter 102. An installation process of the bracket 202 to the translucent outside cover 306 of the existing meter 102 need not require modification of the existing meter 102 nor removal of the translucent outside cover 306. Furthermore, the installation may only require one part of the bracket 202 to be rigidly attached to the translucent outside cover 306 allowing an end-user to install the reader 102 without special skills or tools.
FIG. 4 is an illustration of a preferred sensor. The reader 104, in a preferred embodiment, utilizes a photoelectric sensor 210 such as the Mini-Beam 2 from the Banner Engineering Corp. of Minneapolis, Minn. to read the existing meter. The sensor 210 includes a light source and a photo receptive element. The preferred size of the sensor 210 is about a 1″ square but is not limited to that size. The preferred sensor also includes a threaded member 406 which may be screwed into a nut 216 secured to the meter housing 306 as mentioned above. The nut 218 may also secure the sensor 210 to the bracket 202 as shown in FIG. 2B. For example, the nut 216 may fit into a recessed portion 218 of the bracket 202. A light emitting diode (LED) 402 may be placed on the back of the sensor 210 to provide a visual indication that the sensor 210 is picking up the correct signal such as to aid in installation of the reader 104. The sensor 210 may incorporate a cable 404, such as a serial cable, that supplies the power preferably with 10V or 12 V but may range from 10-30V. The cable 404 may also provide the means for transferring data.
FIGS. 5A and 5B provide an illustration of conventional utility meters 102 such as a digital meter 506 and an analog meter 508. The digital meter 506 may include a numeric display 510. The sensor 210 (FIG. 4) is oriented to beam a light, such as a visible red 660 nm, or another wavelength, onto a rotating disk 502 located in the meter 102. The beam of light passes through the translucent outside cover 306 of the meter 102. The surface of the disk 502 reflects the light; the reflected light is sensed by the photo receptive element of the sensor 210. A marker 504, such as a darkened area, normally found on the rotating disk 502 absorbs the beamed light resulting in an interval where a lower level of light is being reflected to the sensor 210. The number of intervals, counted by the sensor 210, represents the number of turns the disk rotates indicating utility usage during a given time period. The time between each interval is inversely proportional to the rate of power consumed. Further, the aforementioned LED 402 may turn on to indicate whether the sensor 210 has made contact with the rotating disk 502 and turn off when the black marker 504 is being sensed, thus a consumer with no special skills, will be sure of the proper alignment of the sensor 210.
The reader 104 may use software algorithms to avoid spurious data in which light sensors are vulnerable to such as may be caused by sunlight striking the rotating disk 502. The rotating disk 502 in a meter 102, may have a maximum number of rotations per second and the reader 104 may be programmed to ignore certain detections. For example, if a sensor detects more then 2 passes per second from a rotating disk 502 with a 2 rotations per second maximum, the reader 104 may be programmed to ignore the second pass. The reader 104 also may have the capability to alert the end user that an adjustment may need to be made to the sensor 210.
The reader 210 may also use a software algorithm that avoids spurious data based on the time interval between each pass. For example, if a long-short-long pattern of the intervals between passes is sensed by the reader 210 may be programmed to ignore the middle short reading. Again, an alert signal may be sent to the end user that an adjustment may need to be made to the sensor 210.
FIG. 5C is an illustration of the numeric display 510 that may be included as a part of the digital meter 506. The numeric display 510 may be arranged as an array of plural seven-segment numeric indicators 512. FIG. 5D is an illustration of one seven-segment indicator 512, which may be comprised of: a top segment 514, a top-right segment 516, a center segment 518, a bottom-right segment 520, a bottom segment 522, a bottom-left segment 524 and a top-left segment 526. Segments 514 thru 526 may be used to indicate a number zero thru nine.
FIG. 5E illustrates a sensor assembly 528 that may-be used to determine the value of the indicator 512. The sensor assembly 528 may be comprised of: a top sensor 530, an optional top-right sensor 532, a center sensor 534, an optional bottom-right sensor 536, an optional bottom sensor 538, an optional bottom-left sensor 540 and an optional top-left sensor 540. Sensor 530 may be used to determine the state of the segment 514. The sensor 532 may be used to determine the state of the segment 516. The sensor 534 may be used to determine the state of the segment 518. The sensor 536 may be used to determine the state of the segment 520. The sensor 538 may be used to determine the state of the segment 522. The sensor 540 may be used to determine the state of the segment 524. The sensor 542 may be used to determine the state of the segment 526. An array of sensor assemblies 528 may be arranged in front of an array of indicators 512, such as numeric display 510. Sensor assembly 528 or an array of sensors 530 thru 538 may be held in place in front of an array of indicators 512 by an appropriate fixture 544. For example, similarly to the embodiment of reader 104 in FIG. 2, the fixture 544 may be formed as a unitary body that is affixed to the meter 102 (FIG. 5A) by a hook and loop fastener, or other appropriate means.
illustrates which segments 514
and which sensors 530
are associated with which value of indicator 512
. A first column of Table 1
lists sensors 530
. A second column of Table 1
lists corresponding segments 514
. A first row of Table 1
lists values that indicator 512
might display (i.e. 0-9). Each row between rows two thru nine is associated with one sensor and one segment. For example, row two is associated with sensor 530
and segment 514
. While, each column between columns three and twelve is associated with a value that indicator 512
can display. The state of segments 514
and therefore the state of sensors 530
is dependent on the value of indicator 512
. The Xs below each value of indicator 512
are indicative of the state of the segment that is in the same row as the X. For instance if value of indicator 512
is “1” than according to Table 1
, segments 516
will be in a different state then segments 514
| ||TABLE 1 |
| || |
| || |
| ||Value of Indicator 512 |
|Sensor ||Segment ||0 ||1 ||2 ||3 ||4 ||5 ||6 ||7 ||8 ||9 |
|530 ||514 ||X || ||X ||X || ||X || ||X ||X ||X |
|532 ||516 ||X ||X ||X ||X ||X || || ||X ||X ||X |
|534 ||518 || || ||X ||X ||X ||X ||X || ||X ||X |
|536 ||520 ||X ||X || ||X ||X ||X ||X ||X ||X ||X |
|538 ||522 ||X || ||X ||X || ||X ||X || ||X |
|540 ||524 ||X || ||X || || || ||X || ||X |
|542 ||526 ||X || || || ||X ||X ||X || ||X ||X |
In an alternate embodiment of the invention, a subset of five to six of the sensors of the set of seven sensors 530 thru 542 may be used to uniquely determine the value of the indicator 512. Where a set of six sensors are used to determine the value of the indicator 512, the set of six sensors may be comprised of sensors 530, 534 and four sensors of a set comprising sensors 532, 536, 538, 540, and 542. In other words, if only six sensors are used, then one of the sensors 532, 536, 538, 540, and 542 is optional. Where a set of the five sensors are used to determine the value of indicator 512, the set of five sensors may be comprised of sensors 530, 534, 540, 542 and one sensor of a set of the sensor 536 and the sensor 538.
In another alternate embodiment of the invention, rather then providing one sensor per segment as in FIG. 5E, an integrated array may be provided. For example, the array of sensor assemblies 528 may be replaced with a charged-coupled device (CCD). The CCD is an integrated two-dimensional array of sensors. Alternately the CCD may be replaced by four or five linear array detectors (LADs). If an integrated array such as a CCD or LAD is used, an optical character recognition (OCR) routine may be used to determine a value presented by digital display 510. Each sensor in the CCD or LADs array is generally referred to as a pixel. One or more pixels in the array may be assigned to each segment in the digital display 510. One or more lenses may be used to focus an image of digital display 510 onto the CCD or the LADs. The one or more lenses may be used to de-magnify an image of the digital display 510 so it will fit on to a small CCD. The one or more lenses may have different magnifications in the horizontal and vertical directions. The one or more lenses may be Holographic Optical Elements (HOEs). The HOEs may be used for diffracting light reflected from or transmitted by the numeric display 510 onto a set of sensors such as a CCD, a LAD or an array of sensor assemblies 512.
FIG. 5F illustrates an alternate embodiment of the invention, in which a fiber optic sensor bundle 540 may be used to gather data. The fiber optic bundle 546 is comprised of a multiple fibers. The input face of each individual fiber may be positioned in front of each individual segment of digital display 510, such that one fiber or a group of fibers may be assigned one segment for which it gathers light to be used in determining the state of each segment. The output ends of the individual fibers may be bundled together to form one or more fiber optic bundles 546. The output ends of the individual fibers may be coupled to one or more fiber optic amplifiers for converting the signal into usable data. An example of such a fiber optic sensor may be obtained from Keyence Corporation of America.
The sensor 210 may include a light source to illuminate the indicators included in the utility meter such as the digital display 510 or the rotating disk 506. The light source may be pulsed to eliminate the effect of changes in the ambient light on the reading of indicators. The sensor 210 may be an infrared detector and if the light source is necessary, the light source may be an infrared light source.
In yet another embodiment, reader 104 may include an infrared camera. The infrared camera may have a short focal length and include a mount that allows the camera to be rotated 360 degrees about an axis such that the camera may be mounted on the meter and point at a display in the meter. An example of such a camera is the Bullet Camera, model CVC-325WPS sold by CSI/SPECO.
FIG. 6 illustrates a user interface displayed on the screen of the computer 110 (FIG. 1). As Illustrated in FIG. 6, the computer 110 may provide a central location for the end-user to remotely connect to or use directly to view the data collected by the reader 104. Software stored in the computer 110 memory causes the computer 110 to compile data from the reader. The computer may be compliant to all automatic meter reading devices, and therefore might not be specific to the aforementioned reader 104. In addition, the computer may incorporate an adjustable architecture to optimize for various sizes and complexities fitting to the end-user's need.
An interface 602 such as web-based interface (e.g. a browser), allows the end-user to monitor the information relating to consumption. The interface 602 may, for example, render all graphic data as line or bar graphs 608 using Macromedia Corporation's Flash program. By choosing to render data via flash, the vast majority of the program overhead for rendering the interface 602 is handled directly in the browser of the computer used to display the interface 602. Thus, the computer 110 may be an inexpensive device such as an embedded computer system, serial server or other device which contains one or more I/O ports. Because an end user might want to view monthly bar graphs 608 of power consumption, Macromedia Flash provides the ability to present real-time moving graphs or pictures. This might be utilized when providing real-time power consumption rate 606 such as a line graph or chart depicting usage over time or up-to-date/cost per billing cycle costs. In addition the interface 602 may provide other data such as peak demand rate including date and time, of the peak demand. The interface 602 is structured in automobile-familiar methods for ease of use and so that an end-user need not require special training or skills to use.
In addition, a spreadsheet with web-based query capabilities may also be used to allow users to both view live and historical data and save data to files for later review. Using Microsoft Excel's remote web-query feature will allow the consumer to view all data graphs in real-time while providing a familiar interface means that is available to most any user.
Illustrated in FIG. 7 are devices 702 such as Heating Ventilation Air Condition (HVAC) systems and other power consuming devices that may be connected to the computer 110 through a serial port or Ethernet interface of the computer 110. The interface 602 may provide the end-user or utility with information on what devices are being currently used, the rate of power consumption, and the ability to control these devices, therefore, allowing the management of the consumption at a local or remote location.
The ability to manage the rate of consumption may be especially advantageous when dealing with utility companies that use a peak-level billing system. Peak-level billing systems may be implemented as intra-segment pricing systems whereby a peak-use period may have an extremely high rate of power cost and other time segments have a substantially lower power cost. In such systems, consuming power during peak-level periods can have a dramatic effect on the consumer's total power bill. Thus, the computer provides live data and forecast information for both usage (e.g., in kWH) and cost including cost for each time segment and the total of all time segments, allowing the knowledge and control of the amount units consumed and the total cost of that consumption.
By providing a very accurate forecast involving all cost-related segments, the ability for the computer 110 to accurately forecast and signal for reductions or resumptions is significantly increased. If the forecast indicates that usage will exceed the desired amount, the computer may signal for the control of usage of devices to be implemented by manual means or automatically by the computer 110.
Peak-level billing systems may also be used when calculating the forecast total power consumed. In this system, if a customer exceeds a predetermined level of consumption or baseline level, then the utility company may charge a premium rate for the power consumed above the baseline. Some utility companies may also provide rebates on future bills when a customer falls below a predetermined level of usage for a given period. The interface 602 may provide a forecast based on a real-time rate of consumption to determine whether the end-user will be under his monthly baseline utility usage level of consumption or other predetermined level. The forecast may be computed by taking the average consumption used per day of the current billing cycle and multiplying it by the number of days in a billing cycle. So, for example, if the customer of electricity was on day 5 and all segments were equal, the forecast may divide the total power usage at that time by 5 to compute a daily average and then multiply the daily average by the number of days in the billing cycle. A new forecast may be computed continuously based upon present and historical usage. If the forecast indicates that the usage will exceed the baseline level the computer 110 may signal for a home user to manually control the usage of end-use devices directly of from his PDA. For example, the end-user may turn off unnecessary lights, shorten the cycle for dishwashers or clothes washers or decrease the length of time certain devices will run such as a dryer or a HVAC. Futher, the computer may automatically signal a thermostat or lighting systems, especially in an office setting. Such ability to control allows both the utility and consumer to accurately project both the cost and quantity of use for any specified period and greatly simplifies both the management of the user and the utilities distribution system.
In addition, to avoid being charged a premium rate for consumption, the forecast-driven computer 110 can allow the end user to manually or automatically utilize all of the non-premium utility product allocated to him. For example, rather than shutting off the HVAC system and enduring an uncomfortable climate, the end user can use the forecast to adjust the thermostat (e.g., by preconditioning the computer 110 to adjust the thermostat) to provide additional cooling during non-peak times leading up to a peak period and thus require significantly less cooling during the start of peak times. The thermostat may then also be adjusted to provide lesser cooling during the peak period. It may further allow the user to use energy storage technologies during non-peak times which may then be used off-grid during peak periods.
Using the interface 602 provided by the software stored on the computer 110, the end-user may also determine an optimization schedule for running the devices 702. The end-user may obtain data such as cost per hour device used or cost/cycle (washing machine). This may help determine whether the device is properly running as efficient as intended by the manufacturer. Also based on this information, the end-user may program or choose from created device-operating schedules to maximize cost effectiveness and conservation.
In addition to the monitoring and controlling of utility-based consuming devices, the monitoring device 110 may perform other control functions. For example home security systems and fire alarm systems may be connected. The end-user may integrate these devices through the interface and program the monitoring device to respond to signals sent by these systems. For example, if other means of connectivity for a security or fire system were lost, the computer 110 may communicate via an Ethernet interface, the necessary security or fire information as a backup to the primary transmission system. Further, where fire or security systems communicate only via a local display or enunciator or to a remote monitoring company, the computer 110, can provide the alerts from the fire or security system directly to a consumer.
Illustrated in FIG. 8, the computer 110 may be connected to a communication system 804, such as the Internet. This may allow remote access to the data stored and compiled on the computer 110. By allowing remote access to the data on the computer 110, the end-user may control devices from any location such as a computer at work 808 or from his PDA 810. For example, the end-user may want raise the temperature setting on the thermostat during the hours when he is at work and then remotely lower the temperature of his house before coming home, thus saving significant amounts of electricity use.
There may be situations when the end-user wants to make sure that no consumption is taking place, when the end-user is on vacation or business trip, for instance. Remote access to consumption information may provide the end-user with information on whether a particular item is being consumed, at what rate it is being consumed, what device is involved and the ability to control that device.
The utility company 806 may also communicate with the computer 110. The utility company 806 may download the monthly consumption information from the Internet and bill the end-user accordingly. In addition the utility company 806 may set up an on-line billing service and thus cut down on costs incurred in mailing the bill. Further, the utility company 806 may be alerted by the computer 110 when the forecast shows that consumption is exceeding its forecast allowable demand. The utility company 806 may then send an alerts to households or apartment/office buildings to control the usage during a crisis situation. This alert could be sent via pager, text messaging or other means other means for manual adjustment of consumption. The alert could also be sent for direct control of the consuming devices by the computer 110. In addition, the consumer and utility could agree for the consumer to install a certain version of the program within the computer that manages consuming devices in a manner agreed upon between the parties in such a way that both parties benefit economically while maintaining the integrity of the end user's environment.
Remote access to the data may provide landlords of apartment/commercial buildings with readily available utility cost information. Landlords can provide potential lessees current and historic monthly averages of utility bills from their PDA/computer/laptop 814. Also, landlords may live in locations far from the property they own, possibly in a different state; thus, the landlord may use the data to determine at what rate each tenant is consuming power and directly or, via alert to the consumer, adjust their power use accordingly. Further, landlords may use such information from the computer 110 to automatically adjust or charge for the rent, common area expenses or utility charges accordingly.
By having remote access to control power-consuming devices, the landlord or utility company 806 or, both acting together under contract, might regulate the rate of power consumption while not physically going there. For example; the landlord may control the temperature of the common area of the building from his home computer 814 or even programming the lights to turn off at certain times during the day when sunlight is adequate. The utility company 806 may raise the temperature of thermostats for HVAC systems in summer periods when the power-grid is approaching maximum capacity.
FIG. 9 illustrates an alternative embodiment of the present invention. Unless specifically stated, all elements, of FIG. 9 have a one-to-one functional correspondence with those of FIG. 1. FIG. 9 differs from FIG. 1 in that the serial cable 120 (from FIG. 1) that connects the reader 104 and the data-collection unit 106 is replaced with a wireless communication channel. A transmitter 906 for sending wireless communications may be attached to the reader 104 using a shorter serial cable. A receiver 908 may be attached via another shorter serial cable to the data-collection unit 106 for accepting the transmitted communications from the transmitter 906. The transmitter 906 may send data via a wireless carrier frequency, such as 433 MHz, which is standard for garage door openers. It will be apparent, however that another frequency (e.g., 900 MHz) could be used. The signals sent via the transmitter 906, may be in the format of pulses that are created directly from the intervals of lower levels of reflected light sensed by the sensor 210. Thus, each pulse formed by the reader may result in a pulse at the carrier frequency communicated by the transmitter 906. To communicate the pulse to the data-collection unit 106, the transmitter 906 may send a burst of the carrier frequency to represent each revolution of the rotating disk 502. The wireless signal from the transmitter 906 may be encoded with identification information placed on the carrier frequency to prevent interference from other sources. It will be apparent that a number of different schemes may be used for communicating the revolution of the rotating disk 502 via the transmitter 906 and receiver 908. The transmitter 906 and the receiver 908 may receive operating power from a battery or a wall-mounted AC to DC converter.
Similarly to the embodiment of FIG. 1, the reader 104 may communicate directly with the computer 110. In which case, the receiver and cable 904 may be mounted to the computer 110 rather than the data collection unit 106. In addition, the data collection unit 106 may be omitted.
Wireless communication may be used to help eliminate routing problems when using serial cables such as length of the cable needed and outdoor to indoor routing. The wireless communication device would also be helpful for small businesses in which there are multiple readers which all have to be connected to a monitoring device 110.
While the foregoing has been with reference to particular embodiments of the invention, it will be appreciated by those skilled in the art that changes in these embodiments may be made without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims.