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CAPACITIVE POSITION SENSOR AND SENSING METHODOLOGY

  • US 20070095062A1
  • Filed: 11/27/2006
  • Published: 05/03/2007
  • Est. Priority Date: 07/01/2003
  • Status: Active Grant
First Claim
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1. A capacitive position sensor comprising:

  • a fixed electrode support structure comprising a fixed electrode connected to a signal conductor and an additional conductor, said fixed electrode being electrically isolated from said additional conductor; and

    a movable electrode, said movable electrode positioned to move in direct proportion to the movement of a reciprocating member;

    wherein said additional conductor is driven at a potential which is the same as that of said fixed electrode; and

    wherein said fixed electrode and said movable electrode are cylindrical in shape; and

    wherein the position sensor is embodied in a free piston Stirling machine including a linear motor that drives the free piston Stirling machine as a Stirling cooler.

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