Apparatus for distinguishing false signals in cable locating

Details Apparatus for distinguishing false signals in cable locating Apparatus for distinguishing false signals in cable locating

2008-07-08

2008-07-08

Patidar, Jay M (Department: 2862)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

C324S067000

Reexamination Certificate

active

07397249

ABSTRACT:
Discriminating between a cable locating signal and a false cable locating signal is described. A reference signal, which contains a locating signal frequency impressed on it, is transmitted in a way which provides for detection of a phase shift between the locating signal and the false locating signal. Based on the phase shift, a receiver is used to distinguish the locating signal from the false locating signal.

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