Design Of Wireless Tire Pressure Monitoring Module

With the development of social civilization and technology, automobile has been playing an important role in national transportation. But with the rapid development of automobile industry,traffic accidents are increased steadily. Tire blowout is the main reason that causes the accidents. Thus, Real-time monitoring tire Pressure and finding out abnormal situation in time is the key Point to avoid this type of accident. Tire Pressure Monitoring system(TPMS) can collect the Pressure and temperature signals of each tire, and display them on LCD screen, Because it can alert the driver when the data exceeds standard ones, it makes the driver more safe. It is also apart of Automobile Chassis Control System, and can provide data for automobile active control system,too.The direct and indirect TPMS's advantages and disadvantages were discussed. Also, the direction of the TPMS was discussed. The mainly causation of the tire blow-out and the tire's working condition were analyesd in detail. The mainly ccausation of the tire blow-out were gained which is the over pressure, the low-pressure and the over temperature. The general concept of the TPMS was designed based on the conclusion. The general design, man-machine interface and the fixing modes of TPMS's tire module were given out. Also, the chiefly components were chosen. The tire pressure monitoring module were designed in detail based on the total design.The system is composed by one reciver module and four tire modules. The data can transmit by wireless signal between the alarming module and tire modules. The system of hardware were designed by modularization. The low power and the small dimension was considered while design the tire module. In order to reduce the power of the tire module, the data was designed to transmit after compared by the threshold. The alarming module used the sound, the light and the data displayed in the LCD to remind the driver while the pressure was abnormal. In order to improve the antiinterference ability of the wireless data transmitssion, the mode of FSK and CRC was chosen.Each part of the systerm has been analysed and designed in the paper. The crucial technical problems such as low power, small dimension and tire positioning, has been solved. TPMS can assure the tire work at normal pressure and temperature range, which can significantly improve the car driver flatly, security and comfort, have broad application prospects.