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What is the structural principle of tire pressure monitoring?

2 Answers

DiAdrian

09/05/25 3:25am

The structural principle of tire pressure monitoring is that the central processing unit sends low-frequency commands through an antenna to activate the tire pressure sensor. After being awakened, the tire pressure sensor sends a high-frequency signal containing its own identifier to the central processing unit via the antenna. Below is an introduction to the classification of tire pressure monitoring structures: 1. Direct tire pressure monitoring: The direct tire pressure monitoring device uses pressure sensors installed in each tire to directly measure the tire pressure. It then transmits the pressure information from inside the tire to the central receiver module via a wireless transmitter and displays the tire pressure data. When the tire pressure is too low or there is a leak, the system will automatically issue an alarm. 2. Indirect tire pressure monitoring: The working principle of indirect tire pressure monitoring is that when the pressure of a tire decreases, the weight of the vehicle will cause the rolling radius of that wheel to become smaller, resulting in its rotational speed being faster than that of the other wheels. By comparing the differences in rotational speed between the tires, the system monitors the tire pressure. The indirect tire pressure warning system actually relies on calculating the rolling radius of the tires to monitor the pressure.

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IslaAnn

09/17/25 4:01am

There are two types of tire pressure monitoring systems: direct and indirect. I prefer the direct TPMS, which installs a sensor directly in the tire valve stem to measure tire pressure and temperature in real time. This sensor comes with a battery and wirelessly transmits data to a receiver in the car. If the tire pressure drops below 25% of the safe value, the yellow exclamation mark icon on the dashboard lights up. It's essential when driving on highways—last time, the abnormal tire pressure alert saved my tires. Note that the sensor battery needs replacement every five to six years, and you should remind the technician not to damage the valve stem when changing tires.

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