초록 ▼

A vehicle position calculating apparatus has relative position calculating means for calculating a relative vehicle position with respect to a reference position and absolute position calculating means for calculating an absolute vehicle position from fixed-station absolute position information and

A vehicle position calculating apparatus has relative position calculating means for calculating a relative vehicle position with respect to a reference position and absolute position calculating means for calculating an absolute vehicle position from fixed-station absolute position information and vehicle bearing information which are obtained from a radio wave transmitted from a fixed station and the above-described relative vehicle position. The relative position calculating means includes means for calculating a present vehicle position by employing absolute positions successively obtained as new reference positions. Accordingly, it is possible to accurately obtain an absolute present vehicle position.

대표청구항 ▼

A vehicle position calculating apparatus comprising: (a) traveled-distance sensor means for detecting a distance traveled by a vehicle; (b) bearing sensor means for detecting a vehicle advancing direction; (c) relative position calculating means for calculating a relative vehicle position with respe

A vehicle position calculating apparatus comprising: (a) traveled-distance sensor means for detecting a distance traveled by a vehicle; (b) bearing sensor means for detecting a vehicle advancing direction; (c) relative position calculating means for calculating a relative vehicle position with respect to a reference position, using an inertial navigation method employing the traveled distance detected by said traveled-distance sensor means and the vehicle advancing direction detected by said bearing sensor means; (d) absolute position calculating means for calculating an absolute vehicle position on the basis of a plurality of sets of fixed-station absolute position information and radio wave arrival direction information which are obtained in succession from a radio wave transmitted from at least one fixed station and the relative vehicle positions calculated by said relative position calculating means, at a plurality of points where the respective sets are obtained, the calculated absolute vehicle position being employed as a new reference position; (e) correction factor calculating means for calculating a correction factor on the basis of a relationship between the absolute vehicle position obtained by said absolute position calculating means and the relative vehicle position corresponding to the absolute vehicle position and obtained by said relative position calculating means; and (f) present vehicle position calculating means for calculating a present vehicle position by correcting a relative vehicle position with respect to said new reference position, using said correction factor.