A tire inflation pressure sensing apparatus includes a transmitter on a wheel of a vehicle and a receiver on a body of the vehicle. The transmitter includes a pressure sensor working to generate a pressure signal and a charging unit configured to be charged with electrical power via a radio wave from...http://www.google.fr/patents/US7227457?utm_source=gb-gplus-shareBrevet US7227457 - Tire inflation pressure sensing apparatus based on transponder method
Tire inflation pressure sensing apparatus based on transponder method
