What is the principle of tire pressure monitoring?
2 Answers
The principle of tire pressure monitoring involves installing a built-in sensor on the tire. The sensor includes a bridge-type electronic pressure sensing device that detects air pressure, converting the pressure signal into an electrical signal. This signal is then transmitted wirelessly. The display unit shows various data changes or alerts the driver through beeps or other forms when abnormal tire conditions are detected. The working principle of indirect tire pressure monitoring is: when the pressure in a tire decreases, the vehicle's weight causes the rolling radius of that wheel to become smaller, resulting in a faster rotation speed compared to other wheels. By comparing the rotational speed differences between tires, the system monitors tire pressure.
As an experienced driver, I often encounter tire pressure warnings while driving and wanted to talk about how it works. The tire pressure monitoring system mainly operates in two ways. One is the direct type, which involves installing a small sensor in each tire that can measure air pressure and temperature in real-time, then transmit the data wirelessly to the in-car display for constant monitoring. The other is the indirect type, which doesn't use sensors but relies on the wheel speed sensors in the ABS system to detect differences in wheel rotation speed. For example, a tire with low pressure will become smaller and rotate faster, allowing the system to analyze and trigger an alert. I think this is crucial as it reminds us to refill air in time, preventing blowouts and even saving fuel. I usually check the dashboard before driving, and developing this habit has significantly improved safety.
