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Eddy current sensor

  • US 6,462,536 B1
  • Filed: 12/15/1999
  • Issued: 10/08/2002
  • Est. Priority Date: 06/21/1997
  • Status: Expired due to Fees
First Claim
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1. Eddy current sensor comprising an exploring coil having windings wound on a coil form and two terminals, a source of ac voltage, an electrically,conductive measuring probe, and an evaluation circuit, wherein the measuring probe is displaceable relative to the exploring coil, and the evaluation circuit generates an evaluation signal as a function of the position of measuring probe, and wherein the eddy current sensor further comprises an electrode with a tap for enabling electrical contact, the electrode forming together with the windings of the exploring coil and an intermediate electrically insulating layer a component with complex impedances whose output signals are used to determine the position of measuring probe, and wherein the coil form is constructed as said electrode and comprises a material with little electrical resistance.

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