タイヤの電気容量変化と同調回路を用いたひずみ無線パッシブモニタリング

概要

論文の詳細を見る
Reliability of automobiles is increasingly demanded. To prevent burst of tires, smart tires are currently under development. Most of the smart tires have integrated or attached sensors to measure deformation or internal pressure of tires during a long period of service. The embedded sensor enables highly precise measurement of road surface friction, and the precise friction measurements make more efficient anti-lock braking system (ABS). In a previous study, the authors proposed a new wireless strain monitoring method that adopts the tire itself as a sensor, with an oscillator circuit. This method is very simple and useful, but it requires a battery to activate the oscillator circuit. In the present study, the previous method for wireless tire monitoring is improved to produce a passive wireless sensor. A specimen made from a commercially available tire is connected to a tuning circuit comprising an inductance and a capacitance as a condenser. The proposed method enables us to measure an applied strain of a specimen wirelessly, without any power supply from outside. This new passive wireless method is applied to a specimen and an applied strain is measured. As a result, the method is experimentally proved to be effective for the passive wireless strain monitoring of tires.
社団法人日本機械学会の論文
2005-02-25