热网监控系统GPRS通讯终端的设计与实现

Design and Implementation of GPRS Communication Terminal of Heat-supply Network Monitoring System

针对 GPRS 热网监控系统通讯终端常采用"主-从"轮询通信方式单一的缺点,通过优化故障报警上传通信机制,实现了一种"主-从"与"从-主"有机结合的双向通信系统,不仅大大提高了运行速度,还提高了系统的可靠性。通讯终端采用高性能的32位 ARM 处理器,以嵌入式实时操作系统为核心,使用专用的 GPRS 模块 MC39i 实现换热站与调度中心之间的数据通信。阐述了系统的设计思路和终端软、硬件的设计结构,重点介绍了从-主通信方式—故障报警的设计方法。

The heat-supply monitoring system based on GPRS communication technique generally adopts the principle of main-sub communication mode. Aimed at its problem which is sole on communieation, the paper designed and implemented a bidirectidnal communication system combined with sub-main communication mechanism by optimizing fault-alarm and up-link communication function. The system not only raised operating speed of system, but increased the reliability. The communication terminal is designed with high performance 32-bit ARM microprocessor and embedded real-time operating , accompanying with special GPRS module MC39i to carry out data transmission between substationand control center. In addition, the paper briefly discusses the structure of hardware and software as well as the thought of design, emphatically introduces the design method of fault alarm.