基于混合WSN的智能灌溉远程SCADA系统

采用Citect组态软件、无线传感器网络（WSN）、和GPRS模块，开发设计了一套分布式精确灌溉的闭环远程SCADA（Supervisory Control And Data Acquisition）系统。该系统主要由上位机、灌溉监控器、WSN、GPRS无线通讯模块和灌溉阀门系组成。其中，无线传感器网络采用地上和地下的混合拓扑结构，灌溉控制器通过土壤水分含量调控区域面积内的灌水量；远程监控中心采用Citect组态软件实现数据、人机界面管理，并可以通过web发布来实现高层次的监控。测试和试验过程中，数据采样间隔设定为30min，选用4组WSN节点，分别测得深度为5cm和35cm处的土壤温度、含水量，测试结果与普通灌溉相比可节水约20％。该系统实现了灌溉的在线自动监控和作物的精量灌溉，创新性的建立了一种地上、地下混合结构的无线传感器网络模型，为进一步研究奠定了基础。

Remote SCADA System for Intelligent Irrigation Based on Hybrid WSN

The article has designed a closed-loop remote SCADA(Supervisory Control And Data Acquisition)system of distributed precision irrigation by using Citect configuration software,wireless sensor networks and GPRS module.The system consists of monitor computer,irrigation monitor controller,WSN,GPRS wireless communication module and valves,in which the wireless sensor networks adopt hybrid topology above and below ground,the controllers controlling irrigation water yield that applied to each specific unit according to soil water content.The Citect configuration is used to manage data and HMI by the remote monitoring center,which can conduct a more high-level monitoring through web publishing.In the process of tests and testing,the data sampling interval is set for 30 min,4 groups WSN nodes were chosen,the system could get soil temperature and soil water content in 5cm and 35cm depth,and the intelligent irrigation can save water about 20% compared with normal irrigation.This system realizes online automatic monitoring of crop precise irrigation.So a hybrid wireless sensor network model for both aboveground and underground is creatively established,which is also the foundation for further study.