基于无线传感器网络的小粒种咖啡园滴灌自动控制系统

为实现小粒种咖啡种植园的精量灌溉,达到节水增收的目的,基于无线传感器网络（WSNs）设计了一种滴灌自动控制系统,主要由传感器节点、簇头、控制节点和汇聚节点组成.测试了节点间的有效通信距离为50m,并在此基础上,采用静态簇和节点定位布置的方法进行了灌区划分和节点部署,每个灌区为边长50m的正方形,内设1个簇头、1个控制节点和4个传感器节点.采用定时通信与时间同步技术、休眠技术相结合的方法实现节点数据的无线传输,融合土壤含水率、光强和空气温湿度等信息,采用分区轮灌策略实现滴灌的自动控制.实验结果表明：系统实现了预期设计目标,能应用于小粒咖啡园的精量灌溉管理.

Drip irrigation automatic control system for Arabica coffee plantations based on WSNs

To achieve precision irrigation for Arabica coffee plantations and purpose of yield boosting and water saving, a drip irrigation automatic control system, which mainly comprise of sensor node, cluster head, control node and sink node,is designed based on wireless sensor networks （WSNs）. Effective communication distance between nodes is confirmed to be 50m by test,and on this basis irrigation area division and nodes deployment is carried out by using the method of static cluster and node location placement,each irrigation area is a square,whose length of side is 50m, and there are one cluster head, one control node and four sensor nodes, placed in an irrigation area. Data wireless transmission between nodes is realized by combining regular communication with time synchronization technology and sleep technology, and information include soil water content, light intensity, air temperature and humidity are fused, then automatic control for drip irrigation is r~alized by using zoning rotation irrigation strategy based on fusion data. Test re.sults show that the System achieves design goal and can be applied for precision irrigation management in Arabica coffee plantations.