【摘要】 为解决目前丘陵地区果树灌溉技术中存在的过度灌溉、浪费水资源等问题,以实现丘陵果园节水灌溉,结合无线传感器网络技术,设计开发了一种基于无线传感器网络的丘陵果园灌溉控制系统.系统以ATmega128L单片机为控制核心,由上位机、汇聚节点、无线传感器节点、土壤水分传感器和电磁阀等组成,其中土壤水分传感器和电磁阀连接到无线传感器节点上,汇聚节点与传感器节点之间数据采用无线方式进行传输,汇聚节点通过RS-232串口线与上位机相连.系统能实时监测葡萄土壤含水率的变化,根据土壤含水率来判断葡萄是否缺水,并发出灌溉指令实施对葡萄精确灌溉,系统实现了葡萄园灌溉的自动化控制.通过试验,选定25 cm深度的土壤含水率为灌溉启动监测量,启动灌溉的监测阈值设定为26.8%;选定50 cm深度的土壤含水率为灌溉停止监测量,系统停止灌溉的监测阈值为45.5%.试验表明:系统可以达到精确灌溉要求,结合葡萄的生存阈值可以实现节水灌溉.更多还原

【Abstract】 In order to solve existing problems of excessive irrigation and waste water in hill orchard,a technology of water-saving irrigation was studied.A design of hilly orchard irrigation control system based on wireless sensor networks was proposed combined with wireless sensor network technology.It took single-chip ATmega128L as the control core,including host computer,sink node,wireless sensor node,soil moisture sensor and solenoid valves.Soil moisture sensor and solenoid valves were connected to wireless sensor node.Data was transmitted by wireless style between sink node and wireless sensor node.Sink node was connected to host computer by RS-232 serial cable.The system can monitor real-time soil moisture of grapes.The system judges whether grape is water shortages according to soil moisture,then send out the irrigation instructions to implement the precise irrigation of grapes.The irrigation automation control of vineyard is achieved.When the soil moisture is reduced to 26.6% in the depth of 25 cm,the irrigation is started for the grape.When the soil moisture is achieved to 45.5% in the depth of 50 cm,the irrigation is stopped for the grape.The experiment shows that the system has achieved precise irrigation and realized water-saving irrigation combining with the survival threshold of grapes.更多还原