基于WSN的紫外-可见光谱水质COD监测仪采传系统设计

Design of Acquisition and Transmission System for Water COD Monitoring Based on UV-VIS Spectroscopy and Wireless Sensor Networks

针对日益严重的水环境问题,水质化学需氧量(COD)的实时在线监测对水质污染预警具有十分重要的意义。依据紫外-可见光谱分析法可实现水质COD参数在线、原位测量的原理,将无线传感网络(WSN)技术与光谱法水质COD监测技术相结合,研究了一种适用于大面积水域水质COD监测的信息采集与传输系统。基于Coxtex-A7硬件平台,采用数据压缩和无线传感网络等技术实现了水质COD的无线实时监测。实验测试结果表明,该系统能够实现水质COD监测数据的采集与高效、可靠的传输。该系统不仅具有功耗低、流域覆盖面积广、响应速度快、易于维护等特点,还可为水体流域内水质环境的综合分析提供依据。

To solve the increasingly serious problem of water environment, it is of great significance to monitor chemical oxygen demand （COD） of water as the early warning of water pollution. Based on the principle of ultravioletvisible spectroscopy to measure the water quality parameter COD, the collection and transmission system of water COD monitoring information in a large area is studied by combining the wireless sensor network （WSN） technology with spectral COD monitoring technology. Based on the Coxtex-A7 hardware platform, the data compression and WSN is utilized to realize wireless real-time monitoring of water COD. The experimental results show that the system can achieve collection and effective and reliable transmission of water COD monitoring data. This system does not only have the characteristics of low power consumption, wide coverage area, fast response, and easy maintenance, but also provides a basis for the comprehensive analysis of water environment in a water basin.