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Track position sensor and method

  • US 20060267385A1
  • Filed: 12/22/2005
  • Published: 11/30/2006
  • Est. Priority Date: 12/23/2004
  • Status: Active Grant
First Claim
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1. A sensor apparatus for detecting the position or proximity of an object or a structure movable along a defined path such as a track, said sensor apparatus comprising:

  • a dielectric substrate having first and second opposing surfaces;

    a first conductive electrode pad disposed on said first surface of said substrate in a substantially continuous form defining a pad surface area of conductive material;

    a second conductive electrode disposed on said first surface of said substrate in a spaced, side by side relationship to said first electrode pad, and defining a surface area of conductive material; and

    an integrated control circuit (ICC) disposed on said substrate proximate said first and second electrodes and electrically coupled to said first and second electrodes, such that proximity of a metal object or structure activates the ICC.

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