Discriminatory detection at a distance

Details Discriminatory detection at a distance Discriminatory detection at a distance

G - Physics

01

V

354/141, 340/124

G01V 3/10 (2006.01)

Patent

CA 1260146

ABSTRACT A detector for conducting metals within mineralized ground where the detector uses an integrated cross correlator to control a ground balancing element. The detector contains a coil for transmitting sinusoidal magnetic signals and coil for receiving retransmitted signals from the ground and objects. The received signal is demodulated to extract signals predominant in the ground signal, X, the reactive channel, and predominant in object signals, R, the loss channel. Changes in time of these signals, Xa and Ra, when suitably modified to remove signals intrinsically arising from functions of the detector, are cross correlated by a multiplier 15, the output of which is integrated 17. The integrator controls the ground balancing control, the reference phase to the R channel demodulator by means of the phase shifter 18.

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