Vehicle position and azimuth computing system

Details Vehicle position and azimuth computing system Vehicle position and azimuth computing system

1992-06-19

1994-11-22

Chin, Gary

Boots, shoes, and leggings

364454, 364459, 340988, 340995, 342357, 342457, G06F 1550

Patent

active

053674634

ABSTRACT:
An vehicle position and azimuth computing apparatus is constructed to correct both positional errors and azimuth errors caused by the accumulation of a sensor error and a map error and to provide both high positional precision and high azimuth precision. To this end, the vehicle position and azimuth computing apparatus operates to detect both an angular velocity and a moving distance of a vehicle, to compute an on-vehicle position and on-vehicle azimuth, and to detect a straight running condition of the vehicle. Then, after the GPS measurement positions during the straight running of the vehicle have been obtained, regression lines are obtained by regressing the longitudes and latitudes of the measurement positions during the straight running of the vehicle to the moving distance from the straight running starting position of the vehicle. Both a vehicle position and a vehicle azimuth are computed based on the regression lines during the straight running of the vehicle, and then an on-vehicle position and an on-vehicle azimuth, which have been computed based on the detected values of the angular velocity and the moving distance of the vehicle, are modified by using the vehicle position and azimuth obtained based on the GPS measurement data.

REFERENCES:
patent: 4731613 (1988-03-01), Endo et al.
patent: 4903212 (1990-02-01), Yokouchi et al.
patent: 5058023 (1991-10-01), Kozikaro
patent: 5155688 (1992-10-01), Tanaka et al.
patent: 5220509 (1993-06-01), Takemura et al.
patent: 5272483 (1993-12-01), Kato

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