Navigation apparatus based on present position calculating syste

Details Navigation apparatus based on present position calculating syste Navigation apparatus based on present position calculating syste

1988-10-20

1990-07-24

Chin, Gary

Boots, shoes, and leggings

364444, 340988, 340995, G06F 1550

Patent

active

049439251

ABSTRACT:
A navigation apparatus having road system data 6 which represents information of connections and coordinates of intersections and roads between intersections, a travel distance sensor 2, steering angle sensor 3, a present position calculating module 4 for calculating the present position with a unit distance between an intersection and the terminal intersection of a going-out road selected at the former intersection. The apparatus is further provided with a module 15 for generating data on the direction of traveling to a destination point at respective intersections, and a guidance outputting module 5. Traveling direction data is made in response to inputting of the destination point, the present position is determined by selecting a going-out road with the present position calculating module with respect to each intersection, and guidance data on the traveling direction at the terminal intersection of the present road is thereafter output. When a present position is input, the present position is calculated from data on the corresponding road, the travel distance, and the steering angle. Similarly, at the terminal intersection of this road, another road extending in the traveling direction is selected from the road system data. The present position is also calculated with respect to this road.

REFERENCES:
patent: 4688176 (1987-08-01), Hirata
patent: 4774671 (1988-09-01), Itoh et al.
patent: 4774672 (1988-09-01), Tsunoda et al.
patent: 4792907 (1988-12-01), Ikeda et al.
patent: 4796189 (1989-01-01), Nakayama et al.
patent: 4812845 (1989-03-01), Yamada
patent: 4814989 (1989-03-01), Dobereiner et al.

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