Patent ID: 7245208

Claim:
A tire condition detecting system for a vehicle comprising: a transmitter installed in a vehicle wheel having a tire, the transmitter including: a first transmitting/receiving unit for receiving an electrical wave for electrical charging and transmitting signals; a charging unit for supplying electrical power by means of the received electrical wave; a sensing unit for outputting a detection signal related to air pressure of the tire; and a first controller, driven by the electrical power from the charging unit, for processing the detection signal and making the first transmitting/receiving unit transmit the detection signal; and a receiver installed in a chassis of the vehicle, including: a second transmitting/receiving unit for receiving the detection signal transmitted from the transmitter and transmitting the electrical wave; and a second controller for making the second transmitting/receiving unit transmit the electrical wave for electrical charging and for determining the pressure of the tire according to the detection signal, wherein the second controller determines a transmission timing at which the second transmitting/receiving unit transmits the electrical wave to the transmitter, detects an electrical wave for electrical charging from another vehicle at the transmission timing, and waits for a first predetermined period before making the second transmitting/receiving unit transmit the electrical wave on detection of the electric wave from the another vehicle.