The active system uses MEMS technology to make capacitive or piezoresistive pressure sensors on silicon substrates, the pressure sensor is mounted on each wheel, the signal is transmitted through radio frequency, Pressure Sensor the wireless receiving device installed in the CAB receives the pressure sensitive signal, Pressure Sensor and after a certain signal processing, Shows the current tire pressure.
The advantage of active technology is that the technology is relatively mature, the development of the module can be applied to each brand of tires, but the shortcomings are also more prominent, Pressure Sensor its induction module needs battery power, so there is a system service life problems.
The sensor of the passive tire pressure monitoring system is designed with acoustic surface wave, this sensor generates a surface wave through the RF electric field, Pressure Sensor and when the surface wave passes through a piezoelectric substrate, it changes, and the tire pressure can be known by detecting the change in the surface wave. Although this technology does not require battery power, Pressure Sensor it needs to integrate the forwarders into the tires, and it is possible for the tire manufacturers to establish common standards.
Tire pressure Monitoring System to detect the abnormal condition of tire pressure, only with high resolution can have high precision. Battery life is limited and capacity is affected by temperature. Pressure Sensor In order to improve the reliability of the system, the sensor best can be passive detection. The research shows that the information collected by the tire pressure sensor can be used to monitor the vehicle suspension system and correct the navigation system. Therefore, the future automotive pressure sensor should be a variety of functions in a passive intelligent sensor.
Automobile sensor is the fastest-growing and most used sensor in recent years, Pressure Sensor the development of domestic automobile industry stimulates the development of automobile pressure sensor, advanced manufacturing technology and technology make Sensor's performance more and more high, tire pressure monitoring is more accurate.