发明授权
- 专利标题： Method of identifying a buried cable by applying a low frequency signal to the cable and detecting the resultant field
- 专利标题（中）： 通过对电缆施加低频信号并检测合成场来识别埋地电缆的方法
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申请号： US776013申请日： 1997-01-16
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公开(公告)号： US6127827A公开(公告)日： 2000-10-03
- 发明人: Andrew Biggerstaff Lewis
- 申请人： Andrew Biggerstaff Lewis
- 申请人地址： GBX Bristol
- 专利权人： Radiodetection Limited
- 当前专利权人： Radiodetection Limited
- 当前专利权人地址： GBX Bristol
- 优先权： GBX9414847 19940722
- 主分类号： G01V3/02
- IPC分类号： G01V3/02 ; G01V3/06 ; G01R19/00 ; G01V3/08 ; G01V3/10
摘要：
In order to identify a cable buried underground, a very low frequency voltage signal is applied to the cable and an electric field sensor is brought into proximity with the cable. The sensor thus detects the voltage signal on the cable and so identifies the cable. The sensor is unaffected by one or more additional cables carrying voltage signals, which are proximate the cable of interest, as the electric filters from such additional cables do not pass to the cable of interest. The sensor is mounted on a probe which is mounted into a bore in the soil around the cable of interest. The probes may also carry a magnetometer for detecting magnetic fields generated by low frequency alternating current signals on the cable of interest.
公开/授权文献
- US5119914A Accumulator and relay valve 公开/授权日：1992-06-09