| 摘要 |
PROBLEM TO BE SOLVED: To precisely detect a plurality of measurement values including a pneumatic pressure and a temperature of a tire. SOLUTION: This tire information detection device comprises a transponder 10 mounted to a tire of a vehicle, and a controller provided to a vehicle body. The transponder 10 comprises a diode 12 modulating and demodulating signals transmitted and received to and from the controller, a pressure measuring part 20 measuring the pneumatic pressure of the tire, and a detecting resonance circuit 17 connected between the diode 12 and the pressure measuring part 20 and resonating according to the signals from the controller. The transponder has a resonance circuit 30 resonating according to the signals from the controller. By the resonance of the resonance circuit 30, connection between the pressure measuring part 20 and the detecting resonance circuit 17 is controlled. COPYRIGHT: (C)2008,JPO&INPIT
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