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Absolute digital position encoder

  • US 5,880,683 A
  • Filed: 07/23/1997
  • Issued: 03/09/1999
  • Est. Priority Date: 07/22/1993
  • Status: Expired due to Fees
First Claim
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1. A method of manufacturing an absolute Gray coded position encoder that has n sensors, each sensor having k states so that an output code of the encoder is of order k, the method comprising the steps of:

  • (a) generating all n-digit, k-order necklaces that do not have a sub-period;

    (b) ordering a plurality of the necklaces generated in step (a) to obtain an ordered set of necklaces such that a Gray code condition is met between adjacent necklaces of said ordered set;

    (c) encoding a track of said encoder using said ordered set of necklaces generated in step (b); and

    (d) providing n sensors along said track, each sensor detecting one respective digit of the output code.

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