基于磁致伸缩技术的水面蒸发在线监测系统应用

为解决在线蒸发监测系统配套雨量计精度不足问题,基于磁致伸缩技术的方法原理,蒸发和雨量传感系统均采用磁致伸缩液位传感器,配套减阻、防波阻尼系统,精准测量液位;再依据容积法和水量平衡原理计算降雨量和水面蒸发量,使其蒸发系统和雨量系统精度均达到±0.1mm,解决了在线蒸发系统雨量与蒸发监测精度配套问题。系统实时数据通过GPRS信道传送到中心服务器,对数据进行分析处理、存储、转录、发布,实现WEB、手机APP远程实时水面蒸发量、降雨量、工作状态等查询功能。经云南省昆明市海口水文站1 a多的在线监测数据与人工监测数据对比分析,发现在线监测数据精度基本满足现行规程规范要求,且系统运行正常稳定。该技术可为水面蒸发在线监测系统的建设提供参考。

Application of on-line monitoring system of water surface evaporation based on magnetostrictive technology

In order to solve insufficient accuracy of rainfall gauge in on-line evaporation monitoring system, based on the principle of magnetostrictive technology, the liquid level can be measured accurately by adopting telescopic liquid level sensors for the evaporation and rainfall sensing systems supported by anti-drag and anti-wave damping system. Then the rainfall and water surface evaporation are calculated according to the volume method and the principle of water balance, making the accuracy of the system up to ±0.1mm. The system’s real-time data is transmitted to the central server through GPRS channel, and the central server analyzes, processes, stores, transcribes, publishes the data, realizing the remote query of real-time water surface evaporation, rainfall, working state and so on by Web and handset app. Through comparison and analysis on the online monitoring data and manual monitoring data at Haikou Hydrologic station in Kunming, Yunnan Province, we find the accuracy of on-line monitoring data can satisfy the requirements of the current specification, and the system runs normally and stably, which can provide reference for the construction of on-line water evaporation monitoring system.