GPS/self-contained combination type navigation system

Details GPS/self-contained combination type navigation system GPS/self-contained combination type navigation system

1988-03-11

1990-02-20

Lall, Parshotam S.

Boots, shoes, and leggings

364443, 364460, 36457101, 342357, 342451, 342461, G06F 1550, G01C 2100

Patent

active

049032127

ABSTRACT:
In a global positioning system (GPS)/self-contained combination type navigation system for a vehicle, the GPS navigation data are received by the GPS antenna of the navigation system which are simultaneously transmitted from more than 3 pieces of satellites inclusively. From the GPS navigation data, GPS type velocity data is calculated, whereas self-contained type velocity data is calculated from self-contained type navigation data such as azimuth data and drive-distance data of the vehicle. Only when a difference between the self-contained type velocity data and the GPS type velocity data exceeds a threshold velocity, the GPS type velocity data is voided so as to determine the present position of the vehicle.

REFERENCES:
patent: 3940597 (1976-02-01), DiMatteo
patent: 4024382 (1977-05-01), Fowler
patent: 4335433 (1982-06-01), Bauer et al.
patent: 4459667 (1984-07-01), Takeuchi
patent: 4713767 (1987-12-01), Sato et al.
patent: 4731613 (1988-03-01), Endo et al.

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