Navigation system for vehicles including present position calcul

Details Navigation system for vehicles including present position calcul Navigation system for vehicles including present position calcul

1998-01-13

1999-03-30

Zanelli, Michael

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

701224, 342457, G01C 2100, G01C 2200

Patent

active

058900926

ABSTRACT:
In order to calculate the traveling distance and heading of a vehicle in highly accurate fashion, a navigation system is provided with a distance sensor for outputting pulses in proportion to rotation of a wheel, a GPS receiving unit for calculating vehicle speed by GPS reception, acquisition unit for acquiring the number of pulses at the same time as GPS reception, distance correction coefficient calculating unit for calculating GPS traveling distance from the GPS-reception vehicle speed and a time difference between any two points, and calculating a distance correction coefficient from the GPS traveling distance and a pulse difference between two points, and present position calculating unit for calculating present position based upon a corrected distance correction coefficient.

REFERENCES:
patent: 4140970 (1979-02-01), Graziano
patent: 5276451 (1994-01-01), Odagawa
patent: 5307277 (1994-04-01), Hirano
patent: 5469158 (1995-11-01), Morita
patent: 5483457 (1996-01-01), Shibata et al.
patent: 5525998 (1996-06-01), Geier
patent: 5539398 (1996-07-01), Hall et al.

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