System for automatic vehicle location

Details System for automatic vehicle location System for automatic vehicle location

1976-06-07

1978-08-15

Engle, Samuel W.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

340 24, 364450, G01S 302

Patent

active

041076893

ABSTRACT:
An automatic vehicle location system wherein the position of a mobile unit is at any time (on a "real-time" basis) defined by a stored predetermined location code communicated to the mobile unit from a remote unit at a predetermined location and dead reckoned location coordinates relative to such stored location. When the mobile unit passes into the vicinity of a different remote unit, a new predetermined location code is communicated to the mobile unit from such remote units, and the dead reckoned coordinates are reset to zero. A novel dead reckoning system for use in conjunction with a specific deployment of the remote units is also disclosed.

REFERENCES:
patent: 2939135 (1960-05-01), Beckerich et al.
patent: 3715572 (1973-02-01), Bennett
patent: 3886515 (1975-05-01), Cottin et al.
patent: 3899671 (1975-10-01), Stover
patent: 3947807 (1976-03-01), Tyler et al.
patent: 3961166 (1976-06-01), Stobant
patent: 3984806 (1976-10-01), Tyler

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