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Gradiometric Directional Metal Detector

  • US 20080297158A1
  • Filed: 05/31/2007
  • Published: 12/04/2008
  • Est. Priority Date: 05/31/2007
  • Status: Abandoned Application
First Claim
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1. A metal detector comprising:

  • a first resonant circuit comprising a first coil, wherein the first resonant circuit is configured to transmit a first circuit transmit signal;

    a second resonant circuit comprising a second coil, wherein the second resonant circuit is configured to receive a second circuit receive signal;

    a third resonant circuit comprising a third coil, wherein the third resonant circuit is configured to receive a third circuit receive signal; and

    a controller comprising logic to determine a gradient, variable in at least one dimension, based on the second circuit receive signal and the third circuit receive signal.

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