Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1993-03-29
1994-08-02
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
342459, G01S 502
Patent
active
053349865
ABSTRACT:
A device for determining the position of a vehicle comprises a GPS (Global Positioning System) receiver (6) which supplies vehicle position data at regular intervals on the basis of data received from satellites, a device (1) for dead-reckoning on the basis of the position data from the GPS receiver (6), a compass (2) and at least one wheel sensor (3), and a correction unit (4) which corrects the dead-reckoning values supplied at regular intervals by the dead-reckoning device (1) in dependence on comparison with road position coordinates read from a mass memory (5), notably with characteristic road position coordinates, and outputs the corrected values as vehicle position coordinates. For autonomous correction of the data from the GPS receiver the vehicle position coordinates supplied by the correction unit (4) are applied to the GPS receiver (6), the position data derived from the satellite reception in the GPS receiver (6) being corrected in conformity with the vehicle position coordinates supplied by the correction unit (4) and being applied in corrected form to the dead-reckoning device (1 ) as position data.
REFERENCES:
patent: 4459667 (1984-07-01), Takeuchi
patent: 4912645 (1990-03-01), Kakihara et al.
patent: 5075693 (1991-12-01), McMillan et al.
patent: 5087919 (1992-02-01), Odagawa et al.
patent: 5089826 (1992-02-01), Yano et al.
patent: 5220509 (1993-06-01), Takemura et al.
Hellner Mark
Kraus Robert J.
U.S. Philips Corporation
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