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Motion-tracking

  • US 7,000,469 B2
  • Filed: 01/22/2004
  • Issued: 02/21/2006
  • Est. Priority Date: 04/21/2000
  • Status: Expired due to Term
First Claim
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1. A system for tracking the motion of an object relative to a moving reference frame, comprising:

  • a first inertial sensor mounted on the tracked object;

    a second inertial sensor mounted on the moving reference frame;

    a third inertial sensor mounted on the moving reference frame and spaced apart from the second inertial sensor; and

    an element coupled to said first and second and third inertial sensors and configured to determine a position of the object relative to the moving reference frame based on signals from the first and second and third inertial sensors, wherein the determination of the position of the object includes determination of at least one component of an angular acceleration of the moving reference frame and wherein the determination of the annular acceleration is made by combining linear acceleration data from the second and third inertial sensors.

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