System and method for monitoring a pneumatic tire

Details System and method for monitoring a pneumatic tire System and method for monitoring a pneumatic tire

1995-06-07

1996-07-30

Chilcot, Richard

Measuring and testing

Tire, tread or roadway

Tire inflation testing installation

B60C 2302, B60C 2300

Patent

active

055400922

ABSTRACT:
A pneumatic tire monitoring system is disclosed which provides a pressure sensor/transponder unit for each pneumatic tire of a vehicle to monitor tire pressure. A coded signal transmitted from each transponder unit is received by a multi-purpose receiver which may provide information to the vehicle operator or to other vehicle systems and subsystems. Each transponder unit is characterized by ultra low power consumption to extend the useful battery life. The transponder units may be mounted within the vehicle tires, or externally mounted. Impedance matching circuitry allows the use of the wheel rims with the transmitting antenna so as to avoid doppler shift induced by the rotating antenna and frequency drift induced by capacitive coupling.

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