What is the principle of a car tire pressure detector?
1 Answers
Car's built-in tire pressure monitoring can be divided into two types: direct tire pressure monitoring and indirect tire pressure monitoring. Both can detect tire pressure, the difference is that the direct type can display specific tire pressure values, while the indirect type only reminds that there is a problem with the tire pressure. Here is a brief introduction to tire pressure monitoring: 1. Direct tire pressure monitoring Direct tire pressure monitoring devices use pressure sensors installed in each tire to directly measure the tire's air pressure, and use a wireless transmitter to send the pressure information from inside the tire to a central receiver module, which then displays the tire pressure data for each tire. When the tire pressure is too low or there is a leak, the system will automatically alarm. 2. Indirect tire pressure monitoring The working principle of indirect tire pressure monitoring is: when the pressure of a certain tire decreases, the weight of the vehicle will cause the rolling radius of that wheel to become smaller, resulting in its rotation speed being faster than other wheels. By comparing the difference in rotation speed between tires, the purpose of monitoring tire pressure is achieved. The indirect tire alarm system actually relies on calculating the rolling radius of the tire to monitor the pressure. Whether it is direct tire pressure monitoring or indirect tire pressure monitoring, both are very necessary for the safety of car driving.
