×

Apparatus for displaying travel path

  • US 5,016,007 A
  • Filed: 11/29/1988
  • Issued: 05/14/1991
  • Est. Priority Date: 04/19/1985
  • Status: Expired due to Term
First Claim
Patent Images

1. An apparatus for displaying a travel path of a moving body in which locations of the moving body for every unit of travel distance on X-Y coordinates imposed on a road map are successively decided by computer processing, on the basis of outputs of a distance sensor for detecting a travel distance of the moving body and a direction sensor for detecting a direction of said travel, by means of a signal processing device and current locations of the moving body are renewably displayed on a display screen on which line segments of roads on the road map have been previously displayed, on the basis of data of the locations as decided above, comprising:

  • means for effecting polygonal approximation of the travel path of the moving body by line segments of said travel path, said travel path being obtained by storing the data of the locations of the moving body as decided by the above-mentioned computer processing according to a process previously programmed in said signal processing device;

    selecting means for selecting proposed line segments of a road approximating the line segments of said travel path from the above-mentioned line segments of the roads on the road map in which data concerning the locations on the X-Y coordinates of the respective line segments of said travel path which have been previously approximated by polygonal approximation are stored in a memory, said selecting means including a comparing means for comparing characteristic amounts concerning positional relation between (1) the line segment of the travel path decided by the computer processing and (2) the line segment of the road to determine if the amounts fall within an allowable range;

    means for effecting matching of a first pattern of the proposed line segments of the road on the road map as selected and a second pattern of the line segments of said travel path including comparing said first and second patterns and selecting a first pattern that is similar to the second pattern; and

    means for making the travel path coincide with said selected first pattern of the proposed line segments of the road on the road map to which the matching of the pattern has been effected.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×