Tire Pressure Monitoring Sensor (TPMS) is a tire pressure monitoring sensor. It is used to monitor the internal pressure (and sometimes temperature) of the tire in real time and transmit the data to the in-vehicle system. It can alert the driver when the tire pressure is abnormal (too high or too low), helping to ensure driving safety and vehicle performance.
What are the main components of TPMS?
1. Pressure Sensors: Installed in each tire, they measure the tire pressure and temperature in real time. There are usually two ways: direct TPMS, where each tire has an independent sensor that directly measures the pressure. Indirect TPMS, which does not use independent sensors but infers pressure changes by monitoring the speed difference of the tires through the vehicle’s ABS system.
2. TPMS Control Module: Receives data from the sensor and processes and interprets the information based on changes in tire pressure. If the tire pressure is detected to be too low or too high, the control module will alert the driver.
3. Warning Indicator: Usually located on the vehicle dashboard, it will light up the warning light when the tire pressure is lower than the safe value to alert the driver. Common indicator lights are symbols shaped like tire pressure or display specific pressure values.
4. Antenna/Receiver: Responsible for receiving the wireless signal sent by the tire sensor and passing it to the TPMS control module.
5. Sensor Battery: Provides power to the tire pressure sensor. Sensor batteries typically have a lifespan of 5-10 years, and the sensor needs to be replaced when the battery is exhausted.
