[특허]Reader/programmer for two and three wire utility data communications system

Reader/programmer for two and three wire utility data communications system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G08B-019/02 H04Q-009/00
출원번호	US-0903203 (1992-06-23)
발명자 / 주소	Brennan Jr. William J. (Montgomery AL) Hamilton David R. (Auburn AL) Wynn Jr. Warren C. (Montgomery AL)
출원인 / 주소	Schlumberger Industries, Inc. (Atlanta GA 02)
인용정보	피인용 횟수 : 125 인용 특허 : 0

초록 ▼

A two wire/three wire utility data communications system for remotely reading utility meter registers. In the two wire version, a hand-held reading unit is inductively coupled over two wires via a port located remotely from a meter register. Alternatively, a meter interface unit (MIU) may be connected directly to the register via three wires. Each register includes one or more wheel position encoders. An AC interrogation signal is applied by the reading unit to encoder circuitry at the meter which powers the circuitry and causes the position of each encoder wheel to be read. In the two wire mode, register display information (e.g. the current meter reading) is transmitted back to the reading unit by varying the load (impedance) presented by the register side of the circuit. This causes a corresponding variation of the amount of current drawn from the reading unit. The current-modulated signal is decoded by the reading unit and converted into a register reading. The system can also operate in a three wire mode and read older fourteen wire encoded registers. Other features include remote programmability of register characteristics, the ability to interrogate multiple registers which share a common data bus, verification of encoder wheel positions before accepting a reading, real-time flow rate/leak detection, pulse output, and the capability of reading compound meters (i.e. meters having two registers to separately measure high/low flow rates).

대표청구항 ▼

A reader/programmer for communicating with a utility meter over at least two wire lines, comprising: means for generating an interrogate signal; first means for demodulating a data signal received from the utility meter over the wire lines, the data signal consisting of a current in the wire lines which varies in accordance with data being transmitted from the utility meter when the reader/programmer is connected via two wire lines; and second means for demodulating the data signal received from the utility meter over the wire lines, the data signal having characteristics which vary in accordance with data being transmitted from the utility meter when the reader/programmer is connected via at least three wire lines.

이 특허를 인용한 특허 (125)

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Dawson, William A., Apparatus, method and article of manufacture for utility monitoring.
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Patterson,Tim; Holowick,Erwin; Derry,Kenneth J., Automated meter reader having high product delivery rate alert generator.
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Petite, Thomas David; Huff, Richard M, Automotive diagnostic data monitoring systems and methods.
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Campbell, David E.; Kiser, Eric T., Bi-directional protocol.
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Blevins, Terrence L.; Nixon, Mark J., Compensating for setpoint changes in a non-periodically updated controller.
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Tapperson, Gary; Boyd, Thomas A., Distributed control system for controlling material flow having wireless transceiver connected to industrial process control field device to provide redundant wireless access.
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Scoggins,Sean M., System and method of visualizing network layout and performance characteristics in a wireless network.
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Scoggins,Sean M.; Mills,Stuart; Mason,Robert T.; Borleske,Andrew J.; Smith,Kathryn J.; Rudran,Dileep, System for automatically enforcing a demand reset in a fixed network of electricity meters.
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Petite,Thomas D.; Huff,Richard M., System for controlling electrically-powered devices in an electrical network.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Reader/programmer for two and three wire utility data communications system 원문보기

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Reader/programmer for two and three wire utility data communications system 원문보기

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