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Gravimetric rotation sensors: dead reckoning, velocity, and heading sensor system for vehicle navigation systems

  • US 6,466,887 B1
  • Filed: 03/03/2000
  • Issued: 10/15/2002
  • Est. Priority Date: 03/03/1999
  • Status: Active Grant
First Claim
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1. A gravimetric rotational wheel sensor for use on a mobile vehicle, the mobile vehicle having a body, and front axle engaged to the body, and at least one wheel engaged to the axle, comprising:

  • a first accelerometer for engagement to the wheel;

    a second accelerometer for engagement to the wheel and aligned relatively to sense gravitational force 90 degrees out of synch from said first accelerometer;

    a transmitter for engagement to the wheel and for receiving electrical accelerometer output signals representing wheel rotation from said first and said second accelerometers and said transmitter for transmitting said accelerometer output signals;

    said first accelerometer and said second accelerometer are within a container and said container may be mounted to the wheel;

    a transmitter for allowing remote reporting of wheel position from said first and second accelerometers without the need for hard wiring;

    a microprocessor-based electronic circuit for signal processing and data correlation;

    said container configured to ensure said first accelerometer and said second accelerometer are located near the center of the wheel when said container is engaged to the wheel; and

    said microprocessor-based electronic circuit for signal processing and data correlation has a generator that may convert sensed rotational motion of the wheels to electric power.

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