TIRE MONITORING SYSTEM

摘要

A tire monitoring system for supplying power to tire sensor units from a car body side in a non-contact manner. Power is wirelessly transmitted to tire sensor units (10 (10a-10d)) attached to tires (2 (2a-2d)) from non-contact type power supplying units (40 (40a-40d)) provided on the car body side. Wireless power transmission is carried out by using electromagnetic coupling or microwave. A tire sensor unit (10) is provided with a non-contact type power receiving unit that generates a dc power supply based on energy fed fr om a non-contact type power supplying unit (40) to supply power necessary for t he operation of a tire sensor unit (10). A tire sensor unit (10) detects an air pressure or the like and wirelessly sends that information to a receiving device (20).