Sensor

Built-in tire pressure TPMS sensor

Description

Tire pressure sensor installed on the car hub, automatically monitoring tire pressure, temperature, and battery level,and programmable function,it is a integrated tpms sensor.Tire pressure monitoring system working principle is the transmitter wirelessly transmits the detected data to the CAN-BUS receiving box, and the final receiving box transmits the data to the central control system through the CAN BUS. The transmitter system consists of the following parts: electronic part (including tire pressure module, crystal oscillator, antenna, RF module,battery) and structural part (shell and valve).It is a universal tire pressure sensor for car.

product details

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TPMS Sensor System

Tire pressure module: In the transmitter system, the tire pressure module is a highly integrated module that inherits the MCU, pressure sensor, and temperature sensor. By embedding firmware into the MCU, pressure, temperature, and acceleration data can be collected and processed accordingly, and sent out through the RF module.

Crystal oscillator: The crystal oscillator provides an external clock for the MCU, and by configuring the MCU register, parameters such as the center frequency and baud rate of the RF signal sent by the transmitter can be determined.

Antenna: The antenna can send out data transmitted by the MCU.

Radio frequency module: Data was taken from the tire pressure module and sent via 433.92MHZFSK radio frequency.

Battery: Powers the MCU. The battery power has a great impact on the service life of the transmitter.

PCB: Fixed components and provide reliable electrical connections.

Shell: Isolates internal electronic components from water, dust, static electricity, etc., while also preventing direct mechanical impact on internal components.

Valve：Cooperating with the lugs on the shell, the transmitter can be reliably fixed on the wheel steel, which is a necessary condition for tire inflation and deflation.

TPMS Sensor function module

The main functions of TPMS Sensor are as follows:

◆Regularly measure the tire pressure and temperature, and monitor the motion of tire.

◆Periodically transmit tire pressure using an RF signal with a specific protocol.

◆Monitor condition of the battery and notify the system during an RF transmission if the battery performance degrades.

◆Notify the system if there are abnormal pressure variations (leak) in the tire.

◆Respond to the valid LF command signal.

Electronic Characteristics

Parameter	Specification
Operating Temperature	-40℃~125℃
Storage Temperature	-40℃~125℃
RF Modulation Technique	FSK
RF Carrier Frequency	433.920MHz±10kHz①
FSK Deviation	60kHz
RF Baud Rate	9600bps
Radiated Field Strength	<63dBuV/m②
LF Modulation Technique	ASK
LF Carrier Frequency	125kHz±5kHz
LF Baud Rate	3900bps
Pressure Range	0~700kPa
Pressure Accuracy	<7kPa@(0~70℃) <12kPa@(-20~0℃,70~85℃) <19kPa@(-40~-20℃,85~125℃)
Temperature Accuracy	<3℃(-20~70℃) <5℃(-40~-20℃, 70~125℃)
Battery Life	>5 years