Systems and method for identifying objects having conductive...

Details Systems and method for identifying objects having conductive... Systems and method for identifying objects having conductive...

G - Physics

01

V

324/55

G01V 3/11 (2006.01) G01N 27/72 (2006.01) G01R 33/00 (2006.01) G01V 3/10 (2006.01) G08B 13/26 (2006.01)

Patent

CA 1157096

ABSTRACT OF THE DISCLOSURE The type of conductor, its property, and if a metal, its type and cross-sectional area can be obtained from measurements made at different frequencies for the amount of unbalance created in a previously balanced stable coil detection system. The true resistive component is accurately measured and thus reflects only the voltages loss attributable to eddy currents caused by intro- duction of the test sample to the coil system. This voltage divided by corresponding applied frequency gives a curve which peaks at a frequency dependent upon type of conductor. For a metal this peak frequency is proportional to the samples resistivity divided by its cross-sectional area.

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