发明名称 |
SIGNAL SELECT IN UNDERGROUND LINE LOCATION |
摘要 |
A transmitter and receiver for performing a signal select algorithm are provided. A transmitter for providing a signal on a line to be located includes at least one direct digital synthesizer, the direct digital synthesizer producing two component frequencies in response to an input square wave signal; and a feedback loop providing the input square wave. |
申请公布号 |
WO2013166070(A1) |
申请公布日期 |
2013.11.07 |
申请号 |
WO2013US38945 |
申请日期 |
2013.04.30 |
申请人 |
VIVAX-METROTECH |
发明人 |
PETHERICK, STEPHEN JOHN;MAINESCU, GEORGE;DRACEA, ION;STEFANOIU, RAZVAN GABRIEL;ROYLE, JOHN MARK |
分类号 |
G01V3/08 |
主分类号 |
G01V3/08 |
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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