Patent ID: 8456291
Filing Date: 2013-06-04
Classification: B60C

Abstract:
1. A vehicle tire, comprising: a ferroelectric member including a plurality of floating electrode portions arranged in a line on one surface thereof; a movable member including a plurality of electret portions stably maintaining a surface electric potential of approximately 100 volts at a temperature of 100° C. and a plurality of opposed electrode portions, the plurality of electret portions and the plurality of opposed electrode portions being arranged in a line alternately so as to face the plurality of floating electrode portions, the movable member being supported by the ferroelectric member so that the plurality of electret portions and the plurality of opposed electrode portions are moved by an external vibration in parallel to the plurality of floating electrode portions; an air pressure sensor supplied with electric power generated by the movable member; and a wireless communication unit supplied with the electric power generated by the movable member, for transmitting air pressure data detected by the air pressure sensor to outside of the vehicle tire.