Gradiometric Directional Metal Detector
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United States of America Patent
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Issued Date -
Dec 4, 2008
app pub date -
May 31, 2007
filing date -
May 31, 2007
priority date (Note) -
Abandoned
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Abstract
An implementation of a direction finding and magnetic nulling metal detector is provided. Some embodiments of the present invention provide for a metal detector having multiple resonant circuits and associated coils for transmitting a primary transmit signal, transmitting a magnetic nulling signal, and receiving a receive signal. A controller includes logic to process the generate the transmit signals and to process the received signal in order to determine a gradient vector along one or two dimensions, a depth and whether or not a metal object is ferrous.
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