Data processing: vehicles – navigation – and relative location – Navigation – Employing position determining equipment
Patent
1996-11-22
1998-12-22
Louis-Jacques, Jacques H.
Data processing: vehicles, navigation, and relative location
Navigation
Employing position determining equipment
701207, 701209, 701214, 340988, G06F16500
Patent
active
058527915
ABSTRACT:
A vehicle navigation system enables a recognized vehicle position to be corrected to be a position on the correct road even if the vehicle position has been erroneously determined to be on a wrong road, after passing a branching point. A first map matching processing section obtains a most probable candidate road and other candidate roads by map matching processing after passing a branching point, and corrects the vehicle position to a position on the most probable candidate road, the corrected position being regarded as representing the actual vehicle position. A second map matching section corrects the dead-reckoned vehicle position to be a position on another candidate road, and sets the corrected position as a temporary vehicle position. Thereafter, the map matching processing sections perform first map matching processing based on the actual vehicle position and second map matching based on the temporary vehicle position each time a predetermined distance is traveled, in parallel with each other. When the first map matching processing finds no road on which map matching is to be performed, the first map matching is continued by setting the temporary vehicle position as the actual vehicle position.
REFERENCES:
patent: 5119301 (1992-06-01), Shimizu et al.
patent: 5422815 (1995-06-01), Hijikata
patent: 5552990 (1996-09-01), Ihara et al.
patent: 5703780 (1997-12-01), Takanabe et al.
Sato Yoshikazu
Shishido Kan
Alpine Electronics
Arthur Gertrude
Honda Giken Kogyo Kabushiki Kaisha
Klivans Norman R.
Louis-Jacques Jacques H.
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