Importance

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Abstract

A power efficient direct Tire Pressure Monitoring System, TPMS, for providing a non-continuous tire pressure monitoring of a tire of a vehicle, such as a automobile vehicle, the TPMS comprising:

a processing unit having at least a first operating mode and a second operating mode;a timing unit;an acceleration measuring unit;a comparing unit;a pressure measuring unit;a transmitting unit; and,a power supplying unit for supplying power to the processing unit in the first and second operating modes wherein the latter mode is less power consuming than the former mode, wherein the processing unit is adapted to: enter the second operating mode after an acceleration threshold and an operating clock frequency have been set; and,enter the first operating mode responsive to a first trigger signal.

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First Claim