发明名称 |
Apparatus for determining the position of a object |
摘要 |
The position of an object which moves along a fixed path is determined by measuring the phase displacement of two signals received from demodulators connected to an aerial located along the path. A transmitter carried by the objects feeds signals to the demodulators and one of these sends a demodulated signal direct to a comparator while the other sends its signal to the comparator along the aerial.
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申请公布号 |
US4041495(A) |
申请公布日期 |
1977.08.09 |
申请号 |
US19750610393 |
申请日期 |
1975.09.04 |
申请人 |
COAL INDUSTRY (PATENTS) LIMITED |
发明人 |
MARTIN, DAVID JAMES REGINALD |
分类号 |
G01D5/243;G01S5/04;(IPC1-7):G01S3/02;G08B21/00 |
主分类号 |
G01D5/243 |
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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