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在对关键设备的监测中,目前运营单位普遍采用串行通信技术(如RS 232、RS 485等)作为主要的数据传输手段。如果被监测设备离监测中心较远,则需要花费大量的人力物力铺设电缆、光缆及配套设施;并且由于通信距离长,一旦链路出现故障,难以在短时间内准确定位。国内一些科研院所及行业领军企业相继提出基于Zig Bee-GPRS(低功耗局域网协议-通用分组无线服务)模型的数据通信方式,并在农业微灌、油井监测、电力设备监测等系统得到成功应用。结合GPRS网络技术和Zig Bee传感器网络技术的优势,以嵌入式Linux系统为平台,提出一种适用于城市轨道交通列车关键设备监测的复合型Zig Bee-GPRS系统模型。与红外、蓝牙等技术相比,节约能耗,传输距离远;与传统有线传输方式相比铺设成本低。
In the monitoring of key equipment, the current operating unit commonly used serial communication technology (such as RS 232, RS 485, etc.) as the main means of data transmission. If the monitored equipment is far away from the monitoring center, it takes a lot of manpower and material resources to lay cables, optical cables and ancillary facilities; and because of the long communication distance, once the link fails, it is difficult to locate accurately in a short time. Some domestic research institutes and industry leaders have put forward the data communication mode based on the Zig Bee-GPRS (Low Power LAN Protocol-General Packet Radio Service) model and have succeeded in such systems as agricultural micro-irrigation, oil well monitoring and power equipment monitoring application. Combined with the advantages of GPRS network technology and Zig Bee sensor network technology, this paper proposes a composite Zig Bee-GPRS system model suitable for the monitoring of key equipment of urban rail transit vehicles based on embedded Linux system. Compared with infrared, Bluetooth and other technologies, energy saving, transmission distance; compared with the traditional wired transmission laying low cost.