Tire air pressure monitoring system

Abstract

Abstract A tire air pressure monitoring system includes transmitters (3) and a receiver (4). The transmitters (3) wirelessly transmit data regarding the inner pressure of tires (2) and the receiver (4) receives the data from the transmitters (3). Each transmitter (3) has its own ID code and includes a pressure sensor (11) for measuring the inner pressure of the corresponding tire (2). Every time each pressure sensor (11) measures the pressure, the corresponding transmitter (3) generates a time interval by performing a pseudorandom number calculation based on the measured pressure and its ID code. The pressure sensor (11) will measure the pressure each time the obtained time interval elapses. When each pressure sensor (11) measures the pressure for a predetermined number of times, the corresponding transmitter (3) wirelessly transmits data. This system prevents the transmitters (3) from interfering with one another and facilitates the manufacture of the transmitters (3).

Inventors

• 👤 Noboru Imao

Bibliographic Details