| 摘要 |
A tire pressure monitoring sensor, comprising a TPMS shell (10), a pressure sensor core (11), a PCB, a processing circuit (12), a battery (13), a transmitting antenna (14) and a metal cover plate (15), wherein the pressure sensor core (11) comprises a tube base (1), a silicon pressure-sensitive element (2), a sensor shell (3), a sealing element (4), a ceramic body (5), a pressure-sensing transmission medium (6), an output terminal (7), a metal sensing diaphragm (8) and a protective cover (9). The metal sensing diaphragm (8) senses a pressure, the pressure-sensing transmission medium (6) transmits the pressure to the silicon pressure-sensitive sensing element (2), and finally, the output terminal (7) outputs a pressure signal; the sealing element (4) is an O-shaped ring and is installed on the sensor shell (3) to fulfill the sealing function; the ceramic body (5) and the tube base (1) are installed on the sensor shell (3) to fulfill the functions of connection and supporting; and the protective cover (9) protrudes out from a large hole opened on the TPMS shell (10), and a plurality of hollow openings are arranged thereon, so as to protect the metal sensing diaphragm (8) while ensuring that the pressure measurement is not affected. Based on the application requirements of engineering vehicles or special vehicles, the tire pressure monitoring sensor is suitable to be used in a liquid environment. |
