| 摘要 |
<p>A signal transmitting device of a tire pressure meter with a tire valve is disclosed. The tire pressure meter (1) comprises a circuit board (12) furnished with a signal transmitting circuit (121) and a housing (11) encapsulating said circuit board. Said transmitting device comprises: a tire pressure monitoring circuit (123), which is used to monitor the pressure in the tire and convert it into the electric signal; a transmitting circuit fixed on the circuit board, which is used to convert said electric signal into the signal to be transmitted; a cylindrical coil (128), of which one end is electrically connected to said transmitting circuit to receive said signal to be transmitted and transmit said signal to be transmitted to the external space by itself, and as an impedance matching element the other end is electrically connected to the tire valve to transfer said signal to the tire valve; the tire valve, which is universally connected to the housing of the tire pressure meter and transmits the signal to be transmitted to the space. The tire valve in said signal transmitting device is a main antenna, and the cylindrical coil can not only play the role of matching impedance but also transmit the signal as an accessory antenna.</p> |
