Research And Design Of Automotive Tire Pressure Monitoring System

With the popularization of cars, more attention is paid on motor cars'security. The abnormal tire pressure is a main threaten of vehicle driving safety. Therefore, the real-time monitoring of tire pressure has a significant meaning.Based on the fact, a direct tire pressure monitoring system was designed. The tire pressure was measured by sensors, and transported to monitoring terminal through the wireless data transmission. The system performs a real-time monitoring of tire pressure and plays an important role in car safety.Software and hardware design was proposed after the demand analysis. The hardware was composed of central receiving module and tire pressure measurement transmitting module. ARM7 LPC2103 microcontroller existed as the core of this central receiving and processing module. In addition, this module had an expansion of wireless receiver circuit, LCD display and RS-232 communication interface. The tire pressure measuring transmitter module was constituted of MPXY8300 sensor and PCB antennas. The software had function blocks as UART driver, SPI driver, timer driver, LCD driver, wireless data transmission and data reception.On completion of software and hardware design, the microprocessor module, wireless transceiver modules, display modules and serial modules were debugged. The results showed that the system worked well and achieved the intended goals.