发明授权
- 专利标题: REMOTE METER READING
- 专利标题(中): 远程抄表
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申请号: EP93906710.4申请日: 1993-03-19
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公开(公告)号: EP0631682B1公开(公告)日: 2000-12-13
- 发明人: SHEPPARD, Frank , GOSELTINE, Robert
- 申请人: ABB Metering Limited
- 申请人地址: Pondwicks Road Luton, Bedfordshire LU1 3LJ GB
- 专利权人: ABB Metering Limited
- 当前专利权人: ABB Metering Limited
- 当前专利权人地址: Pondwicks Road Luton, Bedfordshire LU1 3LJ GB
- 代理机构: Garratt, Peter Douglas
- 优先权: GB9205977 19920319
- 国际公布: WO9319439 19930930
- 主分类号: G08C23/00
- IPC分类号: G08C23/00 ; H04B5/00
摘要:
A remote meter reading system for example for domestic water meters, operates through an inductive coupling over two lines. A sinusoidal power signal is transmitted from a reader to the meter to power up encoding circuitry in the meter. The encoding circuitry then transmits data by intermittently shorting the input terminals to cause an asynchronous voltage modulation at the reader.
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