Vehicle location monitoring system

Details Vehicle location monitoring system Vehicle location monitoring system

1981-03-06

1983-06-14

Swann, III, Glen R.

Communications: electrical

Selective

Having indication or alarm

340 23, 364450, G08G 100, G08G 112

Patent

active

043886086

ABSTRACT:
The system comprises two parts: a first part which operates on a dead-reckoning basis from measurements of, say, measured wheel rotations (CD,CG) and a knowledge of an initial starting point and heading; and a second part which applies corrections to the first. The second part operates on the basis of a simplified map of the area travelled by the vehicle, said map storing only representations of "forbidden" areas (DZI) where the vehicle cannot possibly go, e.g. parks, lakes, large blocks of buildings etc. . . . A judicious selection of forbidden areas can be stored in highly stylized (i.e. simplified) form and still provide adequate information to overcome the inaccuracies inherent to any dead-reckoning system. This requires far less accurate storage for the secondary system than would a map of areas where the vehicle can go. A processor (OC) performs the required calculations and a display (PCV) is optionally provided for the driver, since in some systems, e.g. fleets of police cars, the point of the system is not to tell the driver where he is, but to tell a central control station.

REFERENCES:
patent: 3789198 (1974-01-01), Henson et al.
patent: 3984806 (1976-10-01), Tyler
patent: 4061995 (1977-12-01), McCrickerd
patent: 4084241 (1978-04-01), Tsumura
patent: 4114437 (1978-09-01), Krogmann
patent: 4139889 (1979-02-01), Ingels
patent: 4192002 (1980-03-01), Draper

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