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Position indicating system

  • US 6,690,159 B2
  • Filed: 03/16/2001
  • Issued: 02/10/2004
  • Est. Priority Date: 09/28/2000
  • Status: Active Grant
First Claim
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1. A position indicating system comprising:

  • a first part having a target device producing a magnetic field;

    a second part having a sensing device including an elongated array of sensors producing respective outputs that vary as a function of magnetic field strength, the first part being movable lengthwise relative to the elongated array of sensors of the second part with the target device adjacent to the sensing device; and

    a processing device receiving the outputs of the sensors for calculating the relative positions of the first and second parts based on the outputs of several of the sensors, the processing device including a processor programmed to scan the outputs of the sensors, determine the sensor having the output indicating the greatest magnetic field strength, and determining the relative positions of the first and second parts based on the outputs of a predetermined number of sensors at each side of the sensor having the output indicating the greatest magnetic field strength.

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