What is the principle of the built-in tire pressure monitoring system in cars?
1 Answers
Automobile 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, with the difference being that the direct type can display specific tire pressure values, while the indirect type only alerts when there is a problem with the tire pressure. Below are detailed explanations: Direct Tire Pressure Monitoring: The direct tire pressure monitoring device uses pressure sensors installed in each tire to directly measure the air pressure inside the tire. It then uses a wireless transmitter to send the pressure information from inside the tire to a central receiver module, which displays the tire pressure data for each tire. When the tire pressure is too low or there is a leak, the system will automatically issue an alert. Indirect Tire Pressure Monitoring: The working principle of indirect tire pressure monitoring is that when the air pressure in a tire decreases, the weight of the vehicle will cause the rolling radius of that tire to become smaller, resulting in a faster rotation speed compared to the other wheels. By comparing the differences in rotation speeds between the tires, the system monitors the tire pressure. The indirect tire pressure alert system essentially relies on calculating the rolling radius of the tires to monitor air pressure. Tire pressure monitoring involves real-time automatic monitoring of tire pressure during vehicle operation, alerting to tire leaks and low pressure to ensure driving safety.
