Abstract: An external TPMS sensor for heavy-duty trucks comprises a helical antenna and a 1225 cell, and is installed outside a tire of a vehicle; and system power consumption is reduced by increasing the communication rate of the TPMS sensor, and/or decreasing the sampling period, and/or decreasing the number of data frames transmitted every time, and/or decreasing RF output power, and/or disposing an LNA circuit at an input terminal of a corresponding receiver antenna. The requirement of the TPMS sensor for a long service life is met by reducing system power consumption; the helical antenna, the matching network, and the 5 dBm chip for outputting power are used to realize miniaturization of the TPMS sensor; and the 1225 cell is used, which, compared with traditional TPMS sensors, allows the diameter of the TPMS sensor to be reduced by about 8 mm and the weight of the TPMS sensor to be reduced by over ?, such that miniaturization of the TPMS sensor is further realized.

Abstract: The present disclosure relates to a tire pressure sensor and a tire valve. The tire pressure sensor includes: a printed circuit board, a battery and a helical antenna assembly, where the printed circuit board, the battery and the helical antenna assembly are processed through an injection molding process to produce a sensor assembly. The helical antenna assembly includes an antenna support and a helical antenna on an outer sidewall of the antenna support. The antenna support is internally hollow, and a helical groove is provided on the outer sidewall of the antenna support. The helical antenna is wound in the helical groove. A plurality of fasteners for fixing the circuit board are at the bottom of the antenna support. A pressure sensing component and an antenna matching circuit are printed on the printed circuit board.