Inertial orientation tracker having automatic drift compensation using an at rest sensor for tracking parts of a human body

  • US 20030023192A1
  • Filed: 12/18/2001
  • Published: 01/30/2003
  • Est. Priority Date: 06/16/1994
  • Status: Active Grant
First Claim
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1. An apparatus for generating a signal that corresponds to at least two of the three orientational aspects of yaw, pitch and roll of a human-scale body, relative to an external reference frame, said apparatus comprising:

  • a. a self contained sensor for generating first sensor signals that correspond to xth order integrals of the rotational accelerations of said body about certain axes relative to said body, where x is between and includes 1 and 2;

    b. a mechanism for mounting said sensor to said body; and

    c. coupled to said sensor, a signal processor for generating orientation signals relative to said external reference frame that correspond to said at least two orientational aspects from said xth order integral signals, wherein the first sensor signals are impervious to interference from electromagnetic, acoustic, optical and mechanical sources.

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