发明名称 |
RF meter reading system. |
摘要 |
<p>The RF meter reading system includes a transmitter having an encoder. Meter data is encoded and modulated using a bi-phase modulating scheme. In order to uniquely identify the start of a data transmission, a super start field, which is an "illegal" bi-phase signal is used. The super start field is selected such that it cannot be recognized if transmissions from more than one transmitter are being received by the receiver. <IMAGE></p> |
申请公布号 |
EP0650151(A1) |
申请公布日期 |
1995.04.26 |
申请号 |
EP19940402382 |
申请日期 |
1994.10.21 |
申请人 |
SCHLUMBERGER INDUSTRIES, INC. |
发明人 |
BRENNAN, WILLIAM JAMES, JR. |
分类号 |
G01D4/00;G08C15/00;G08C17/02;(IPC1-7):G08C17/02 |
主分类号 |
G01D4/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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