To provide a tire internal information transmitter capable of receiving signals including tire internal information without interference in a receiver.
A sensor module body 15 is mounted to a tire of a vehicle, and provided with a pressure sensor 24 for acquiring tire internal pressure, a temperature sensor 25 for acquiring a tire internal temperature, and a ROM 26 for storing tire mounting positional information set so that tire internal information transmitters (sensor modules) may have tire mounting positions (addresses) different from each other and information on different delay time at each tire mounting position. When a return request is received from an external receiver, the signal including the tire internal information on the tire internal pressure and the tire internal temperature is transmitted to the external receiver after the lapse of the stored delay time.
TOYOFUKU MASANORI
KOKUBU TAKAO
Shiro Fujitani
Kiyoshi Kuruma