Abstract: Safety monitoring plays an important role in reservoir operation and management. For the existing systems, data collection is usually carried out by wired transmission mode with serial RS- 485 which faces problems such as wiring difficulties, long construction period, high cost, vulnerable to lightning, and so on. This paper puts forward an online safety monitoring system for embankment dams based on ZigBee wireless communication technology which has realized the electrical isolation between the various monitoring points and monitoring center. As well, it is of the benefits including high security and reliability, easy construction, simple wiring, low cost and et al. The commissioning and operation has proved that the system is stable and reliable, and the goals of design and requirements are met.

Key words: ZigBee, RS-485, reservoir safety monitoring system

摘要： 安全监测在水库运行管理中起重要作用。在已有的系统中，采集数据通常采用基于RS-485串口的有线传输方式，该有线网络存在布线困难、施工周期长、成本高和易受自然雷击放电影响等缺点。笔者提出了一种基于ZigBee无线通信技术的土石坝水库安全在线监测系统，它实现了各监测点与监控中心的电气隔离，具有安全性和可靠性高、施工方便、布线简单、成本低等优点。该系统经过现场调试及运行后，运行稳定、可靠，达到了预期的设计目的和要求。

关键词: ZigBee, RS-485, 水库安全监测系统