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Vehicle Compass Using Telematics Unit and Vehicle Sensor Information

  • US 20090088974A1
  • Filed: 09/28/2007
  • Published: 04/02/2009
  • Est. Priority Date: 09/28/2007
  • Status: Active Grant
First Claim
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1. A vehicle position detection system for using a telematics unit and vehicle sensor information to estimate a current vehicle position, the system comprising:

  • a yaw rate sensor that measures an angle of turn of the vehicle;

    a wheel steering angle sensor that measures the angle at which one or more vehicle wheels are turned;

    a wheel speed sensor that measures a speed of rotation of one or more wheels of the vehicle;

    a gear position sensor that senses a current gear condition of a transmission of the vehicle;

    a global positioning system that provides vehicle location and heading; and

    a compass application that calibrates the yaw rate sensor to subsequently estimate vehicle heading information in the absence of GPS location information;

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