What is the Principle of the Tire Pressure Monitoring System?

[DiKaleb]

The principle of automotive tire pressure monitoring can be categorized into two types: 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. The pressure information is then transmitted from inside the tire to a central receiver module via a wireless transmitter, where the data for each tire's pressure is displayed. The system automatically alerts the driver when the tire pressure is too low or if there is a leak. 2. Indirect Tire Pressure Monitoring: Indirect tire pressure monitoring works by detecting when the air pressure in a tire decreases, causing the vehicle's weight to reduce the rolling radius of that wheel, which in turn makes it rotate faster than the other wheels. By comparing the differences in rotational speed between the tires, the system monitors the tire pressure. Essentially, the indirect tire pressure alert system relies on calculating the rolling radius of the tires to monitor air pressure.