On-vehicle position computing apparatus

Details On-vehicle position computing apparatus On-vehicle position computing apparatus

1992-09-11

1995-01-17

Chin, Gary

Boots, shoes, and leggings

364443, 364454, 342451, 342457, 340988, G06F 1550

Patent

active

053831276

ABSTRACT:
High degree of accuracy of the position of a vehicle can be ensured by maintaining the continuity of the running path of the vehicle and by correcting the vehicle position to a vehicle position measured by a GPS navigation system when a positional deviation occurs due to sensor errors. Specifically, the vehicle positions are estimated in accordance with signals from sensors for detecting behaviors of the vehicle, and then the vehicle position is shifted onto a designated road having a feature coincident with that of the running path of the vehicle based upon data of the estimated vehicle positions. Further, the vehicle position is corrected to a position measured by use of a GPS receiver only when the cumulative value of distances of the positional shifts made by a number of cycles in past or in a predetermined running distance range exceeds a predetermined threshold value.

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Yamada et al "GPS Navigator," Japanese Radio Technical Bulletin No. 24, 1986.
Edward J. Krakiwsky, "A Kalman Filter for Integrating Dead Reckoning, Map Matching and GPS Positioning", IEEE Plans '88 Position Location and Navigation Symposium Record, Kissemee, Fla. USA, 29 Nov. 2-Dec. 1988, pp. 39-46.

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