| 摘要 |
<p>A tire inflation pressure monitor includes wheel transmitters (3) and a receiver (4). The wheel transmitters (3) transmit tire inflation pressure data by radio waves, and the receiver (4) receives the data from the transmitters (3). The receiver (4) includes reception antennas (23, 24) for receiving radio waves from the transmitters (3) and a receiver unit (20) for processing the received data. The reception antennas (23, 24) include external reception antennas (23), which are separated from the receiver unit (20), and at least one internal reception antenna (24), which is located in the receiver unit (20). The number of the external reception antennas (23) is less than that of the transmitters (3) by one. As a result, the receiver (4) is simplified without reducing its performance. Also, loop antennas, which are used as reception antennas (23, 24) to induce voltage by the magnetic field component of radio waves, improve the efficiency of the receiver (4). <IMAGE></p> |
