ROTATION DETECTOR FOR WHEEL

摘要

PROBLEM TO BE SOLVED: To realize a structure capable of detecting the revolution speed and revolution number of a wheel supported with a turning wheel 3 and other states contributing to operation of an automobile. SOLUTION: A sensor unit 20 is supported with an outer wheel 1 not turning in use and the revolution detection of the turning wheel 3 is made free by the revolution detection sensor held in the sensor unit 20. By placing other sensors such as temperature sensor and vibration sensor in the sensor unit 20 in addition to the revolution detection sensor, the purpose is realized.