Patent EA-004163-B1 (EA)
Title: System and method for wireless automatic meter reading
Inventor: HAN MYOUNG COOK
IPC: G08C19/36
Filed: 2000-12-18
Abstract: 1. A system for wirelessly and remotely reading an integrating meter, the rote reading meter reading system having a user-side remote meter reading unit for receiving a meter value displayed on a display of the integrating meter in the form of an image, recognizing the meter value and wirelessly transmitting meter value, and a meter reading center for receiving and processing numeric code data transmitted by the user-side remote meter reading unit and transmitting a timing code for execution of a wireless remote reading operation, the user side remote meter reading-unit comprising: an image sensor module installed in a predetermined portion of said integrating meter for scanning the display of said meter, said image sensor module including an image sensor for picking up an image of a numeral displayed on said display and converting the picked-up image into an electrical signal; an optical character reader module comprised of a dynamic random access memory for storing data of the numeral image picked-up by said image sensors a digital signal processor for performing a preprocessing operation for the numeral image data stored in said dynamic random access memory to extract only components necessary to numeral recognition therefrom, and a main processor unit for comparing data extracted by said digital signal processor with a recognition library stored in an electrically erasable and programmable read only memory, generating a numeric code corresponding to said numeral image in accordance with the compared result and storing the generated numeric code in a flash read only memory and adapted to recognize the meter value picked up by the image sensor module; a radio frequency module for transmitting numeric code data stored in said flash read only memory and/or code data of a numeral currently displayed on said display to the meter reading center for a predetermined period of time and receiving a command from said meter reading center; and a synchronous time controller for performing a sleep mode operation at a normal state and, only when the current time is in accord with a timing code of the command received by said radio frequency module, supplying power from a power supply to the optical character reader module and said radio frequency module to minimize power consumption. 2. The system as set forth in Claim 1, wherein said image sensor is a complementary metal-oxide semiconductor image sensor. 3. The system as set forth in Claim 1, wherein said image sensor module is installed in front of the display of said integrating meter while being spaced apart therefrom, and scans a numeral displayed on the display. 4. The system as set forth in Claim 1, wherein said image sensor is a transparent plate image sensor composed of a plastic polymer transistors and is attached to a casing or transparent window of the integrating meter at a predetermined position so as to allow the display of the integrating meter to be read with the naked eye. 5. The system as set forth in Claim 1, wherein said image sensor module further comprises a transparent body for refracting or reflecting the image of the numeral displayed on said display and transmitting the refracted or reflected image to said image sensor module so that the display of the integrating meter can be read with the naked eye. 6. The system as set forth in Claim 5, wherein said transparent body has a cylindrical shape, and installed beside the display of the integrated meter along a length of the display of the integrated meter. 7. The system as set forth in Claim 5, wherein said transparent body has a triangular prism shape, and installed beside the display of the integrated meter along a length of the display of the integrated meter. 8. The system as set forth in Claim 1, wherein when two or more integrating meters and corresponding user-side remote meter reading units are installed within a given area, one of the user-side remote meter reading units is designated as a master and the others thereof are designated as slaves and the master remote meter readings unit directly communicates with the meter reading center and the slave remote meter readings units communicate with the meter reading center through the medium of the master remote meter reading unit. 9. The system as set forth in Claim 1, wherein said radio frequency module is a radio pico-cell module. 10. The system as set forth in Claim 1, further comprising two-way data transmission/reception means for performing the transmission and reception of data between said radio frequency module and said meter reading center, said two-way data transmission/reception means including an interactive pager or a two-way messenger. 11. The system as set forth in Claim 1, further comprising data network-based cellemetry means for performing the transmission and reception of data between said radio frequency module and said meter reading center, said data network-based cellemetry means including a personal communication service system, a code division multiple access system, a time division multiple access system or a global system for mobile communication. 12. The system as set forth in Claim 1, wherein said optical character reader module and said image sensor module are integrated into a one-chip unit. 13. The system as set forth in Claim 1, wherein when said integrating meter is installed in a communication dead zone the image sensor module is installed in the integrating meter, the radio frequency module is installed in a communicatable zone and the data are transmitted and received between said image sensor module and said radio frequency module over a power line. 14. The system as set forth in Claim 1, wherein said power supply for supplying power to the user-side remote meter reading unit is a replaceable battery. 15. The system as set forth in Claim 1, wherein said power supply for supplying power to the user-side remote meter reading, unit is a solar cell or organic electrolyte solar cell. 16. The system as set forth in Claim 1, wherein said power supplied to the user-side remote meter reading unit is current induced by an induction coil. 17. A method for wirelessly and remotely reading an integrating meter, comprising the steps of: a) picking up an image of a numeral displayed on a display of said integrating meter and converting the picked-up image into an electrical signal; b) storing data of the picked-up numeral image in a dynamic random access memory; c) performing a preprocessing operation for the numeral image data stored in said dynamic random access memory to extract only components necessary to numeral recognition therefrom; d) comparing the extracted data with a recognition library stored in an electrically erasable and programmable read only memory, generating a numeric code corresponding to said numeral image data in accordance with the compared result and storing the generated numeric code in a flash read only memory; e) transmitting numeric code data stored in said flash read only memory and/or code data of a numeral currently displayed on said display to a meter reading center via a radio frequency module for a predetermined period of time; and f) receiving and processing said numeric code data transmitted via said radio frequency module. 18. The method as set forth in Claim 17, wherein said numeric code data is temporarily stored in said flash read only memory prior to its transmission to said meter reading center. 19. The method as set forth in Claim 17, wherein said meter reading center is adapted to transmit a command to said integrating meter, said command including a command code for instructing said integrating meter to perform an image pickup operation and an identification code for designating said integrating meter. 20. The method as set forth in Claim 17, wherein said numeric code data transmitted to said meter reading center via said radio frequency module includes numeric data regarding an integrated amount and an identification code indicative of said integrating meter.