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Position measuring system

  • US 20010052771A1
  • Filed: 05/01/2001
  • Published: 12/20/2001
  • Est. Priority Date: 05/24/2000
  • Status: Active Grant
First Claim
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1. A position measuring system comprising a transmitter (32;

  • 54;

    90;

    102;

    140), a sensor (12;

    44;

    84;

    100;

    134) with an inductive element (16;

    50;

    94;

    136) to which the transmitter is coupled electromagnetically, and an evaluating unit (24;

    46;

    86;

    132), wherein the sensor and the transmitter are adapted to be positioned relative to one another, characterised in that the inductive element (16;

    50;

    94;

    136) is coupled to an oscillator which is affected by the Q factor and/or the effective inductance of the inductive element, in that the Q factor and/or the effective inductance of the inductive element (16;

    50;

    94;

    136) is determined by the size of an effective sensor region to which the transmitter is coupled, and/or by the size of an effective transmitter region which is coupled to an effective sensor region, and in that the sensor and/or the transmitter are formed in such a manner that the size of the effective sensor region to which the transmitter is coupled, and/or the size of the effective transmitter region which is coupled to the effective sensor region is dependent on the relative position between the transmitter and the sensor in a direction transverse to a direction of separation (58;

    106) therebetween.

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