| 摘要 |
<p>A tire information detecting apparatus includes an interrogator (10) which transmits an interrogation signal toward a tire in a vehicle at a transmitting timing, and receives a reply signal including tire information such as a tire pneumatic pressure at a receiving timing so as to process the signals, a responder (1) which is disposed in the tire and has a sensor (4) being excited by a predetermined frequency signal for detecting tire information so as to return the reply signal to the interrogator (10) at the receiving timing in responding to the interrogation signal, and a mixer unit (3) which receives the interrogation signal having a first signal and a second signal which is spaced the predetermined frequency away from the first signal, from the interrogator (10), and outputs a signal of the frequency difference between the two signals to the responder by mixing the first and second signals.</p> |
