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Body motion detecting system with correction for tilt of accelerometers and remote measurement of body position

  • US 6,590,536 B1
  • Filed: 08/18/2000
  • Issued: 07/08/2003
  • Est. Priority Date: 08/18/2000
  • Status: Expired due to Fees
First Claim
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1. A method for detecting motion of a body by wireless means, comprising a radio transmitter and antenna mounted on said body, accelerometers mounted on said body, a base station bearing a receiver and multiple receive antennas, said receive antennas having a least two polarized antennas placed orthogonal to one another, measuring of signal strength received by said polarized antennas, a computer calculating from said received signal strengths the angular position of said transmitter antenna, said accelerometers reporting body acceleration in multiple directions, said computer also calculating the correction to the accelerometers readings for gravity error produced by said angular position, and further computing converting accelerometer readings to true X and Z accelerations, and displaying of the resulting motions.

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