G - Physics – 01 – V
Patent
G - Physics
01
V
340/124.3
G01V 3/06 (2006.01) G01V 15/00 (2006.01)
Patent
CA 1317005
43162 CAN 2A Abstract of the Disclosure A method and system for determining the location of a first insulated conductor (10) and a plurality of similar branch conductors (28,38) that are branches of the first conductor, but without ohmic contact being made with the first conductors. A passive marker (16) having a resonant circuit that includes an inductor and capacitor is provided for each of the branch conductors and is positioned to be inductively coupled to the first con- ductor and the associated branch conductor. The first conductor (10) is a part of a closed loop circuit and each branch conductor is a part of separate closed loop circuits. An alternating signal (14) applied to any one of the closed loop circuits is inductively transmitted to each of the other closed loops that is inductively coupled to a passive marker having a resonant frequency equal to the frequency of the alternating signal. Flow of alter- nating signals in the closed loops and passive markers cause a detectable electromagnetic signal to be produced to identify the location of the first conductor, branch conductors and passive markers when conducting the alternating signals.
597556
Cosman Armond D.
Minarovic Joe T.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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