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Detection element for objects and detection device using the same

  • US 6,812,707 B2
  • Filed: 05/19/2003
  • Issued: 11/02/2004
  • Est. Priority Date: 11/27/2001
  • Status: Expired due to Fees
First Claim
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1. A body detecting element configured to be buried in the ground with a metal body and comprising:

  • a detector housing configured to be integrally mounted on an outer surface of the metal body;

    a magnetic member disposed in the detector housing and configured as a magnetic core;

    an antenna coil wound around the magnetic member; and

    one of a capacitor and a piezo-resonator connected to both the ends of the antenna coil to form a resonance circuit with the antenna coil, wherein the detector housing includes one of a cross section and a length smaller than a corresponding cross section and length of an area to be detected by said body detecting element.

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