发明名称 |
Ground control unit for cable locating |
摘要 |
A system and method for selectively grounding each of a plurality of short-haul buried utility conveyances coupled to a common long-haul buried utility conveyance to enable a conveyance locating signal transmitted through the long-haul conveyance to travel from the long-haul utility conveyance to a selected short-haul utility conveyance. The system includes a first optical switch for selecting each of the plurality of short-haul utility conveyances to be grounded, where the first optical switch is adapted to receive an optical signal and selectively output the optical signal on one of a plurality of optical fibers; and a second optical switch coupled to each of the plurality of optical fibers for grounding each short-haul utility conveyance in response to the optical signal on a corresponding optical fiber.
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申请公布号 |
US2009079433(A1) |
申请公布日期 |
2009.03.26 |
申请号 |
US20080315348 |
申请日期 |
2008.12.02 |
申请人 |
ESLAMBOLCHI HOSSEIN;HUFFMAN JOHN;BOLAND JOHN K;TURLEY CLAYWELL D |
发明人 |
ESLAMBOLCHI HOSSEIN;HUFFMAN JOHN;BOLAND JOHN K.;TURLEY CLAYWELL D. |
分类号 |
G01V3/11 |
主分类号 |
G01V3/11 |
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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