What is the principle of a car tire pressure monitor?

[Sherry]

There are two principles of car tire pressure monitors: 1. Use a wireless transmitter to send pressure information from inside the tire to a central receiver module, which then displays the tire pressure data for each tire. 2. When the pressure of a certain tire decreases, the vehicle's weight will cause the rolling radius of that wheel to become smaller, resulting in its rotational speed being faster than other wheels. By comparing the difference in rotational speed between tires, the purpose of monitoring tire pressure is achieved. More information about tire pressure is as follows: 1. When the tire pressure is too high, the contact area between the tire and the ground decreases, and the contact area is inversely proportional to the pressure. The smaller the contact area, the greater the pressure the tire bears. When the tire bears excessive pressure, it will accelerate tire wear and may even cause brake failure and tire blowout. 2. When the tire pressure is too low, the contact area between the tire and the ground increases, leading to an abnormal rise in tire temperature during driving, which can easily cause sidewall deformation and reduce the tire's service life.