发明名称 |
Method and apparatus for underground line crossing detection |
摘要 |
A method and apparatus for detecting contact between an underground electric wire conduit and an underground utility pipeline in which a detectable signal is applied to an electric line wire disposed within the underground electric wire conduit and the underground utility pipeline is monitored for a presence of the detectable signal. When there is a contact between the underground electric wire conduit and the underground utility pipeline, the signal applied to the electric line wire is detected by a suitable signal detector disposed on the surface of the utility pipeline and/or within the utility pipeline.
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申请公布号 |
US8555722(B2) |
申请公布日期 |
2013.10.15 |
申请号 |
US20090561649 |
申请日期 |
2009.09.17 |
申请人 |
ERSOY DANIEL ALLEN;ZIOLKOWSKI CHRISTOPHER;GAS TECHNOLOGY INSTITUTE |
发明人 |
ERSOY DANIEL ALLEN;ZIOLKOWSKI CHRISTOPHER |
分类号 |
G01H1/12 |
主分类号 |
G01H1/12 |
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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