Introduction：
As an important part of the automobile, the main factor to consider the tire performance is the tire pressure. Too low or too high tire pressure will affect the performance of the tire and reduce its service life, and ultimately affect the safety of driving.
TPMS stands for tire pressure monitoring system. TPMS is used for real-time and automatic monitoring of tire pressure and alarm of tire leakage and low pressure to ensure driving safety.
Principle:
When the air pressure of a tire decreases, the wheel's rolling radius will be smaller, resulting in its speed faster than other wheels. The tire pressure can be monitored by comparing the speed differences between the tires.
Indirect tire alarm system TPMS actually relies on calculating the rolling radius of the tire to monitor the air pressure; direct tire pressure monitoring system TPMS is the valve with sensors directly replace the valve valve of the original car, an induction chip in the sensor is used to sense the small changes of tire pressure and temperature under the static and moving conditions, and the electrical signal is converted into a radio frequency signal, and an independent channel transmitter is used to transmit the signal into the receiver, thus, the owner can know the tire pressure and temperature of the body tire whether in the driving or the static state.
Now, all of them are direct tire pressure monitoring systems, while indirect tire pressure monitoring systems have basically been phased out. Only a small number of imported cars manufactured in 2006 are equipped with indirect tire pressure monitoring systems.
Tire pressure monitoring systems are generally installed on rims, through the built-in sensors to sense the pressure in the tire, the pressure signal will be converted into electrical signals, through the wireless transmitter signal will be transmitted to the receiver, by displaying various data changes on the display or in the form of a buzzer, the driver can fill or deflate the tire in a timely manner according to the displayed data, and the leakage can be dealt with in a timely manner.
Design background:
The excellent performance of automobile and the service life of tire are affected by tire pressure. In the United States, tire failure causes more than 260,000 traffic accidents a year, according to SAE data, and a burst tire causes 70 percent of highway accidents. In addition, natural tire leakage or insufficient inflation is the main cause of tire failure, about 75% of the annual tire failure is due to. The data also show that the tire burst is an important reason for frequent traffic accidents in high speed driving.
The tire burst, this invisible killer, has caused many human tragedies, and has brought incalculable economic losses to the country and enterprises. Therefore, the United States federal government, in order to reduce the occurrence of traffic accidents caused by tire burst, ask automakers to speed up development of TPMS.
Post time: Sep-19-2022