Title:
VEHICLE POSITION MONITORING SYSTEM
Document Type and Number:
Japanese Patent JPS56140500
Kind Code:
A
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.
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Inventors:
PATORISU BERUNAARU
Application Number:
JP3189181A
Publication Date:
November 02, 1981
Filing Date:
March 05, 1981
Export Citation:
Assignee:
PATORISU BERUNAARU
International Classes:
G01C21/14; G08G1/0968; G01C21/22; G01C21/30; G01C22/02; G08G1/123; (IPC1-7): G08G1/12
Domestic Patent References:
| JPS528853A | 1977-01-24 |