Accurate, rapid, reliable position sensing using multiple sensing technologies

  • US 5,592,401 A
  • Filed: 02/28/1995
  • Issued: 01/07/1997
  • Est. Priority Date: 02/28/1995
  • Status: Expired due to Term
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First Claim
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1. A device for providing an improved signal value in relation to a change in position of a movable entity along a path, said device comprising at least two sensors, wherein each one of a pair of said sensors has a deficiency not shared by the other sensor and a proficiency not shared by the other sensor, said deficiencies and proficiencies relating to position and time, said device comprising:

  • first and second position sensors providing first and second signal values, respectively, for said position, where each of said first and second signal values have a proficient component and a deficient component of said signal values, wherein said signal values are different;

    each one of said sensors mounted on sensor supports for positioning in functional relationship to said entity for measuring the movement of said entity; and

    a data processor for receiving said first and second signal values for said entity, upon receipt of each second signal value selecting said second proficient component from said second signal value and improving said first signal value with said second proficient component.

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