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Chain code position detector

  • US 6,327,791 B1
  • Filed: 06/09/2000
  • Issued: 12/11/2001
  • Est. Priority Date: 06/09/1999
  • Status: Expired due to Fees
First Claim
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1. A device for sensing the position of a movable member which moves along an axis relative to a stationary member, comprising:

  • a scale including a nonrepeating code on the movable member aligned substantially along the axis;

    a two-dimensional detector fixed to the stationary member and positioned to sense a portion of the scale within a view of the detector, said detector generating a plurality of signals, each signal indicative of the particular viewed portion of the scale sensed by the detector; and

    a controller determining the position of the movable member relative to the stationary member as a function of the signals.

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