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Position sensing transducer

  • US 9,470,505 B2
  • Filed: 06/13/2013
  • Issued: 10/18/2016
  • Est. Priority Date: 06/13/2012
  • Status: Active Grant
First Claim
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1. A transducer for an inductive position sensor comprising:

  • a first coil comprising a plurality of loop portions arranged sequentially along a measurement path over a measurement range and arranged so that adjacent loop portions have opposite winding directions;

    a second coil arranged along the measurement path; and

    a target that is arranged to magnetically couple with said first and second coils so that signals are generated that depend on the relative position of the target and the first and second coils;

    wherein the target extends along the measurement path and has an axis that is inclined at an angle to the measurement path so that substantially all of the target overlaps with loops of the first coil and so that when a first end of the target is adjacent a first loop of the first coil, a second end of the target is adjacent a second loop of the first coil that has an opposite winding direction to that of the first loop;

    wherein the second coil is arranged relative to the target such that the magnetic coupling between the second coil and the first end of the target is in a same one direction across the measurement range and such that the magnetic coupling between the second coil and the second end of the target is in an opposite direction across the measurement range.

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