Vehicle navigation apparatus

Details Vehicle navigation apparatus Vehicle navigation apparatus

1991-02-20

1993-06-15

Chin, Gary

Boots, shoes, and leggings

364454, 342357, 340988, G06F 1550

Patent

active

052205096

ABSTRACT:
A vehicle navigation apparatus comprises a self-contained positioning system, GPS positioning system, and a controller for performing arithmetic operation on the basis of the output of any one of the self-contained positioning system and the GPS positioning system so as to display various navigation information on a display. The controller corrects the bearing data based on the self-contained positioning system with respect to that based on the GPS positioning system if the bearing data of self-contained positioning system differs from that of the GPS positioning system by more than a predetermined value when a vehicle velocity determined on the basis of the position data from any one of the positioning systems exceeds a predetermined value.

REFERENCES:
patent: 4713767 (1987-12-01), Sato et al.
patent: 4731613 (1988-03-01), Endo et al.
patent: 4743913 (1988-05-01), Takai
patent: 4837700 (1989-06-01), Ando et al.
patent: 4890233 (1989-12-01), Ando et al.
patent: 4903212 (1990-02-01), Yokouchi et al.

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