×

Vehicle navigation system

  • US 5,155,688 A
  • Filed: 10/18/1990
  • Issued: 10/13/1992
  • Est. Priority Date: 10/24/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. A vehicle location detecting system provided in a vehicle for detecting the location thereof, comprising:

  • self-contained type location detecting means for calculating accumulation-type location data based on motion signals from sensors mounted on said vehicle;

    satellite navigation type location detecting means for calculating satellite-type location data from satellite location data transmitted by a plurality of satellites constituting a global positioning system (GPS) navigation system;

    memory means for storing accumulation-type location data calculated by said self-contained type location detecting means;

    means for selecting accumulation-type location data from said memory means which is closest to said calculated satellite-type location data;

    synthesizing means for calculating synthetic location data based on the selected accumulation-type location data from said memory means and said calculated satellite-type location data;

    a road map memory for storing road map data;

    on-road location detecting means for calculating an on-road location of said vehicle based upon said synthetic location data and said road map data; and

    display means for displaying the calculated on-road location of said vehicle.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×