Tire pressure monitoring system has two main solutions, Passenger Car Tyres direct system and indirect system.
Direct tire pressure monitoring system is the use of pressure sensors installed in each tire directly measure the tire pressure, Passenger Car Tyres and the tire pressure display and monitoring, when the tire pressure is too low or leakage, the system will automatically alarm.
Indirect tire pressure monitoring system is through the car abs system wheel speed sensor to compare the speed difference between the tires in order to achieve the purpose of monitoring tire pressure, the type of system, Passenger Car Tyres the main drawback is:
1, can not show the exact tire instantaneous pressure value;
2, the same axle or the same side of the wheel or all tire pressure at the same time can not alarm;
3, can not take into account the speed, detection accuracy and other factors.
Active system is used in the silicon on the use of mems process to produce capacitive or piezoresistive pressure sensor, the pressure sensor installed in each wheel, the way through the radio frequency signal to send out, Passenger Car Tyres installed in the cab wireless The receiving device receives the pressure sensitive signal and undergoes a certain signal processing to show the current tire pressure.
The advantage of active technology is that the technology is more mature, Passenger Car Tyres the development of the module can be applied to the label of the tire, Passenger Car Tyres but the shortcomings of the more prominent, the sensor module requires battery power, so there is the problem of system life.
Passive tire pressure monitoring system sensor is designed using a surface acoustic wave, which generates a surface acoustic wave through a radio frequency electric field. When the surface acoustic wave passes through the surface of the piezoelectric substrate material, it changes, Such a change in the surface acoustic wave, Passenger Car Tyres you can know the tire pressure situation. Although this technology does not have battery power, but it needs to be integrated into the tire transponder, the tire manufacturers need to establish a common standard is possible to implement.
Tire pressure monitoring system to detect the tire pressure anomalies, only with high resolution to have high accuracy. Battery life is limited, Passenger Car Tyres and the capacity is also affected by temperature. In order to improve the reliability of the system, Passenger Car Tyres the sensor is best for passive detection. The study shows that the information collected by the tire pressure sensor can be used to monitor and correct the navigation system of the vehicle suspension system. Therefore, Passenger Car Tyres the future of the car pressure sensor should be set in a variety of functions in a passive intelligent sensor.
Automotive sensors are the fastest growing and most used sensor in recent years. Passenger Car Tyres The development of the domestic automobile industry has stimulated the development of automotive pressure sensors. The advanced manufacturing technology and process technology have made the performance of sensors higher and higher. Passenger Car Tyres Tire pressure monitoring is also Increased accuracy.