ZigBee技术的汽车胎压监测系统设计

Design of tire pressure monitoring system based on ZigBee technology

针对目前直接主动式汽车胎压监测系统处理器与射频芯片分开设计、433 MHz无线频率造成的系统体积大、无组网、抗干扰能力弱等关键技术问题,设计了一种基于无线传感器网络的直接主动式汽车胎压监测系统.其中系统采用ZigBee首款SOC单芯片CC2430,无线通信频率为2.4 GHz.软件设计上改进了ZigBee通讯协议CSMA/CA机制,这样既能有效避免各轮胎监测节点发送数据的冲突,又能降低系统能耗、延长网络寿命.该系统能够实时自动监测轮胎内部压力、温度等状态信息,从而有效地保障了汽车行驶安全.

In view of the key technology problems in the present direct-active tire pressure monitoring system(TPMS),such as large size,no network and weak anti-interference caused by separating the processor from RF chip,the wireless communication frequency 433 MHz,a kind of direct-active TPMS based on wireless sensor network was designed.The system was adoptd with ZigBee first SOC single-chip CC2430 and 2.4 GHz of wireless communication frequency.In software design,ZigBee communication protocol CSMA/CA mechanism was...