Patent ID: 7387020

Claim:
A tire information detecting system comprising: a measured value transmitter disposed in a tire of a vehicle; and a controller disposed in the body of the vehicle; wherein the measured value transmitter includes: an antenna, a modulating/demodulating unit that is connected to the antenna and that is operative to modulate and demodulate signals received and transmitted from and to the controller, first and second coupling capacitors connected to the antenna, a first resonator connected to the first coupling capacitor, the first resonator including a first piezoelectric single-crystal resonating element and a pressure sensor, and a second resonator connected to the second coupling capacitor, the second resonator including a second piezoelectric single-crystal resonating element and a capacitor, and wherein the controller is operative to transmit a signal that resonates the first and second resonators, receive a signal having the resonance frequency of the first resonator and a signal having the resonance frequency of the second resonator, compute a measured value in accordance with the resonance frequencies of the first and second resonators retrieved from the received signals, or any combination thereof.