Method and apparatus for target-guided localizing of a cable fault
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United States of America Patent
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Oct 13, 2015
Grant Date -
Dec 5, 2013
app pub date -
Jun 3, 2013
filing date -
Jun 1, 2012
priority date (Note) -
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Abstract
A method and an apparatus provide targeted guidance for a user to locate and trace-out the path of a buried electrical cable, and to locate a cable fault along the cable. A current pulse is applied to the cable, whereby a magnetic field is generated around the cable and an acoustic signal is emitted from the cable fault. The apparatus detects and measures magnetic field information to locate the cable. The apparatus measures a time delay between detecting the magnetic signal and detecting the acoustic signal. By comparing successive time delays at successive measuring positions, a relative proximity to the cable fault is determined. The cable location information and the cable fault distance information are combined to produce a direction indication for the user. Tracing the cable layout and determining the cable fault location can be carried out in a single procedure using a single apparatus.
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