Vehicle locating system

Details Vehicle locating system Vehicle locating system

1982-06-03

1985-07-16

Groody, James J.

Communications: electrical

Vehicle position indication

At remote location

340941, 340933, 340989, G08G 112, G08G 101

Patent

active

045299820

ABSTRACT:
Location-representative signals are communicated to vehicles (12, 14, 16) by modifying existing traffic detector stations of the type utilizing an inductive coil (20) embedded in the roadway (22). Circuitry (44-52) is provided for generating a carrier signal modulated in accordance with a modulating signal representative of the location of an associated traffic detector station. A transformer (56) couples the modulated carrier signal into the existing inductive coil such that the coil establishes a magnetic field above the roadway which is modulated by the location representative signals. The vehicles have inductive coils (70) mounted thereon for sensing the modulated magnetic fields, and circuitry (72, 74, 76) for extracting the location-representative signals therefrom. The location-representative signals may then be, e.g., automatically transmitted to a central dispatching station (18).

REFERENCES:
patent: 3419865 (1967-05-01), Chisholm
patent: 3697941 (1972-10-01), Christ
patent: 3757290 (1973-09-01), Ross et al.
patent: 3868626 (1975-02-01), Masher
patent: 4083003 (1978-04-01), Haemmig
patent: 4083008 (1978-04-01), Eschke
patent: 4251797 (1981-02-01), Bragas
patent: 4253192 (1981-02-01), Donnally et al.
NEC Research and Development, Mikami, No. 52, Jan. 1979, pp. 1-10.

Affiliated with

Also associated with

Rating

Vehicle locating system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Vehicle locating system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vehicle locating system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1738491