Apparatus for displaying travel path

• US 4,893,246 A
• Filed: 12/09/1987
• Issued: 01/09/1990
• Est. Priority Date: 12/15/1986
• Status: Expired due to Term

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Yasui, Shinichiro, Iihoshi, Akira, Nakamura, Yukinobu
• Primary Examiner(s): Chin, Gary
• Application Number:
  US07/130,680
• Time in Patent Office: 762 Days
• Field of Search: 364/443, 364/444, 364/449, 364/521, 340/988, 340/990, 340/995, 73/178 R, 342/451
• US Class Current: 701/208
• CPC Class Codes: G01C 21/26 specially adapted for navigation in a road network
• CPC Class Codes: G01D 7/00 Indicating measured values

Abstract

An apparatus for displaying a travel path of a running body which apparatus includes sensors and a central processing unit (a) for calculating a distance of approach of the running body relative to a target to produce data concerning the approach, (b) for comparing the old and new data and thus successively, renewing the data concerning the approach, thereby obtaining a closest distance of the running body relative to the target, and (c) for deciding that the running body has passed the target when said closest distance is within a predetermined range.

Claims

1. An apparatus for displaying a travel path of a moving body in which a current location of the moving body during travelling on two-dimensional coordinates is successively computed and the current location of the moving body is displayed on a map and successively renewed according to data of the current location thus computed, comprising:

means for setting at least one target point on a desired running course on the map; and

means for deciding that the moving body has passed the target point by a determination that a closest distance of the current location of the moving body relative to the target point, the closest distance having been obtained by computation of data of position of the target point and data of the current location, is within a predetermined distance.

2. An apparatus for displaying a travel path of a moving body during travel on two-dimensional coordinates is successively computed and the current location is displayed on a map and successively renewed according to data of the current location thus computed, comprising:

means for setting at least one target point on a desired running course on the map;

means for setting a running direction of the moving body at the target point; and

means for deciding that the moving body has passed the target point by a first determination that a closest distance of the current location of the moving body relative to the target point, the closest distance having been obtained by computation of data of position of the target point and data of the current location, is within a predetermined distance and by a second determination that a difference in angle between an actual running direction of the moving body after reaching a closest position relative to the target point and a running direction previously set at the target point is within a predetermined angle.

3. An apparatus for displaying a travel path of a moving body according to claim 2 in which the decision is made on the second determination after the moving body reaches a closest position relative to the target point after the moving body has travelled for a predetermined distance passed the closest position.

4. A method for displaying a travel path of a moving body in which a current location of the moving body during travelling on two-dimensional coordinates is successively computed and the current location of the moving body is displayed on a map and successively renewed according to data of the current location thus computed, the method comprising the steps of:

setting at least one target point on a desired running course on the map; and

deciding that the moving body has passed the target point by (1) obtaining a closest distance of the current location of the moving body relative to the target point by computation of data of position of the target point and data of the current location and (2) determining that the closest distance is within a predetermined distance.