Discriminating time domain conducting metal detector utilizing m

Details Discriminating time domain conducting metal detector utilizing m Discriminating time domain conducting metal detector utilizing m

1994-08-04

1996-07-16

Snow, Walter E.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

324233, G01V 308, G01V 310, G01N 2772, G01R 3312

Patent

active

055370411

ABSTRACT:
This invention is for a method of an apparatus to perform metal discriminatory detection comprising the application of a multi period rectangular wave form to a transmitter coil, processing received signals by combining received components measured during different selected periods with respect to the transmitted signal in a manner based upon the predictable characteristics of ground constituents and thereby to provide an output signal which will be selectively indicative of a metal object within a target volume and substantially distinguishable from any signal arising from any electrically non-conducting ferrite in the target volume.

REFERENCES:
patent: 4110679 (1978-08-01), Payne
patent: 4628265 (1986-12-01), Johnson et al.
patent: 4868504 (1989-09-01), Johnson
patent: 4942360 (1990-07-01), Candy

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