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Angular velocity calculating apparatus for navigation apparatus

  • US 5,708,438 A
  • Filed: 11/17/1995
  • Issued: 01/13/1998
  • Est. Priority Date: 11/25/1994
  • Status: Expired due to Fees
First Claim
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1. A navigation apparatus for a mobile vehicle, comprising:

  • plural velocity detectors each for detecting a velocity of the moving vehicle;

    processing means for deriving a value of a parameter determining an angular velocity of said moving vehicle;

    angular velocity calculating means for calculating the velocity of said moving vehicle based on the value of said parameter from said processing means;

    velocity calculating means for calculating a mean velocity of said moving vehicle from outputs of said plural velocity detectors;

    digital storage means for storing digital map data;

    display means for displaying a map and a position of said vehicle on said map; and

    a central processing unit for calculating a position of a vehicle based on said angular velocity determined by said angular velocity calculating means and said mean velocity determined by said velocity calculating means, for reading digital map data from said digital storage means, and for generating an output signal to said display means so that said display means displays said map and said position of said vehicle on said map.

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