TIRE INFORMATION DETECTING DEVICE FOR OBTAINING FAVORABLE RECEIVING SENSITIVITY BY KEEPING A POLARIZED WAVE SURFACE AND DIRECTIONAL CHARACTERISTICS OF A RECEIVING ANTENNA A CONSTANT VALUE ABOUT A ROTATING TRANSMITTING UNIT

摘要

PURPOSE: A tire information detecting device is provided to obtain stable receiving sensitivity by keeping the distance between a transmitting unit and a receiving unit a constant value although the transmitting unit rotates according to the rotation of a tire by installing the receiving unit near a rotation center of the tire. CONSTITUTION: A tire information detecting device is composed of a detecting unit for sensing the state degree of a tire(T); a transmitting unit(TU) for sending a signal output from the detecting unit; a receiving unit(RU) for receiving the signal delivered from the transmitting unit; and a brake actuator(BD) regulated to apply brake power to a vehicle. The receiving unit is mounted at a vehicle body and arranged inside the radial direction from the outer diameter of the brake actuator.