G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 25/10 (2006.01) B60R 25/10 (2006.01) G01S 3/32 (2006.01) G01S 5/00 (2006.01) G01S 5/14 (2006.01) G08G 1/127 (2006.01) H04B 7/26 (2006.01) H04M 11/00 (2006.01) H04Q 7/38 (2006.01)
Patent
CA 2137002
A vehicle tracking system makes use of a conventional cellular telephone network including a plurality of fixed cellular transmitter sites each covering a predetermined area. The system includes a plurality of cellular signal processing units for instal- lation at hidden locations in vehicles to be monitored. Each unit is connected to one or more different sensors in the vehicle, at least one of the sensors being a break-in detector for detecting tempering with the vehicle, and to a cellular antenna, and includes a controller for monitoring the sensor outputs and initiating an emergency message transmission to a remote monitoring station in the event of actuation of a sensor. The car processing unit monitors site identifying signals and signal strengths of trans- missions from adjacent cellular transmitter sites in an emergency, and the emergency message includes vehicle identifying infor- mation, cell site identifying information, and signal strength information which will be dependent on distance from the cell site. The monitoring station includes a computer for determining and displaying an approximate vehicle location from the incoming cell site identifying and signal strength information.
Sheffer Eliezer A.
Thompson Marco J.
Smart & Biggar
Trackmobile
LandOfFree
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