基于FSK调制模式的新型胎压监测系统开发(英文)

Development of a new tire pressure monitoring system using FSK modulation

分析了间接式胎压监测系统(TPMS)的不足,并基于FSK信号调制模式抗噪声强的特点,开发了一种新的直接式胎压监测系统.该系统由轮胎压力传感器和胎压控制器组成:轮胎压力传感器采用高集成复合芯片SP37实现轮胎内部压力、温度、加速度等信息的检测和发射,体积小、重量轻;胎压控制器以8位单片机控制射频接收器MC33596实现无线数据的接收、显示和报警.基于素数的动态延时算法和节能策略,降低了多个传感器同时发射时发生连续数据冲突的概率,在满足系统监测实时性的前提下延长了工作寿命.实车测试效果表明,该系统数据接收灵敏度可达到-100 dBm,在汽车时速100 km时工作很稳定.

The drawback of indirect Tire Pressure Monitoring System （TPMS） is presented, and a new direct TPMS is devel- oped based on Frequency-Shift Keying （FSK） modulation,which has the advantage of strong anti-noise performance. The new TPMS is composed of the tire pressure sensor and the controller. The smart and light-weighted tire pressure sensor collect~ pressure ,temperature and acceleration signals of the tire and then sends them out by chip SP37 ,and the controller,which em- ploys an 8-bit microcontroller MC33596, receives and displays those wireless signals and gives alarm if conditions meet. Be- cause the new TPMS employs a dynamic delay algorithm based on prime number and an energy-saving strategy, the probability of data conflict due to simultaneous data sent by multiple sensors is lowered, and the life-span is also prolonged while meeting real-time monitoring. Road test results suggest that the newly developed TPMS has a data receiving sensitivity of - 100 dBm, and it works stably when the vehicle even reaches 100 km/h.