Research Of Tire Following-Up Pressure Monitoring System

When the car is at high speed, tire failure is the most worrying of all drivers and the most difficult to prevent, also an important cause of abrupt traffic accidents. How to prevent tire burst has become an important issue for driving safety. Tire following-up pressure monitoring system can dynamically and real-time monitor tire pressure, temperature etc, and alarming when it monitors abnormal tire situation, that can prevent tire burst effectively, to ensure drivers and passengers' security.This paper aims at tire capability's effect on vehicle safety running, analyses tire burst mechanism and tire running capability, starts with to monitor tire pressure and temperature, aims at a few deficiency existing in present TPMS, puts forward an improvement TPMS scheme based on current main TPMS scheme and the basis on people's study. According to the system scheme, the hardware and software design for tire module and main controller module were accomplished. In the field of hardware, the schematic circuits was designed, including the circuit of sensor module, wireless communication, CAN communication, the serial communication and electrical source. In the field of software, low-power dissipation of tire module was designed, the SPI communication between sensor and single chip microcomputer was simulated through software, wireless communication protocol was constituted, the problem of data frames transmitting collision was resolved with CSMA/CA, the transmitting and receiving subprogram of ZigBee equipment CC2420 were done, and the CAN communication, the serial communication, the subprogram of alarming and dealing with and the display and alarm module were designed. Finally, the quiet and dynamic test on system had been carried out, and system capability had been analysed.