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Apparatus for position data acquisition and an apparatus for coil position recognition

  • US 6,137,529 A
  • Filed: 11/23/1992
  • Issued: 10/24/2000
  • Est. Priority Date: 11/23/1992
  • Status: Expired due to Fees
First Claim
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1. A position data acquisition apparatus for providing position data with respect to an object, said apparatus comprising:

  • a TV camera;

    a laser light source;

    a difference circuit for calculating a difference signal between a first image data taken with said TV camera while said laser light source is off and a second image data taken with said TV camera while said laser light source is on;

    a binarization circuit for binarizing an image data signal from said difference circuit by comparing said image data signal with a threshold value; and

    an integrating circuit for integrating outputs of said binarization circuit for a frame and for producing the position data output.

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