Apparatus for displaying travel path

Details Apparatus for displaying travel path Apparatus for displaying travel path

1988-07-27

1990-10-16

Orsino, Joseph A.

Communications: electrical

Vehicle position indication

Map display

73178R, 340990, 364449, G06F 1550

Patent

active

049638645

ABSTRACT:
Disclosed is a travel path displaying apparatus for indicating the current position of an automobile running on a selected road in a road map appearing on an associated screen. A cumulation of errors in estimating sequential current positions will cause an incorrect indication of the automobile's position on the screen and the automobile will depart from all the roads appearing on the screen. In order to find the correct road on which the automobile is traveling it is necessary to carry out pattern matching between the travel trace and each of a number of selected roads, thereby determining which road is closest to the travel trace in shape. The apparatus permits selection of the least possible number of roads for pattern matching, thus permitting quick determination as to the road on which the automobile is traveling and as to the direction in which it is traveling.

REFERENCES:
patent: 4535335 (1985-08-01), Tagami et al.
patent: 4679147 (1987-07-01), Tsujii et al.
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: 4807127 (1989-02-01), Tenmoku

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