基于WSN的智能温室大棚自动定点喷灌系统

Intelligent Greenhouse Automatic Designated Sprinkler System Based on WSN

针对传统温室大棚灌溉智能化和自动化水平低的问题,采用无线传感器网络WSN技术设计了智能温室大棚自动定点喷灌系统。系统主要由监控中心上位机、多个温湿度监测和电磁阀控制节点、密封储水罐压力监测节点、充压机和水泵控制节点组成。通过温湿度传感器获取土壤表层的温度和湿度数据,并经过ZigBee网络将该节点ID和数据打包实时发送至监控中心上位机,一旦监测到的湿度低于设置的阈值时,会控制对应该区域的电磁阀开启进行喷灌,同时控制充压机保持储水罐内的压力为恒定值。试验表明,该系统能准确获取土壤表面的温湿度数据,实现了整个温室大棚的定点喷灌和密闭储水罐的自动补水功能。

For the low level intelligence and automation problem of traditional greenhouse irrigation , the intelligent green-house automatic designated sprinkler system which is composed of monitoring center host PC , temperature and humidity monitoring and solenoid valve control nodes , sealed storage tank pressure monitoring node , filling presses and pump con-trol node is designed .The temperature and humidity sensor is used to get the temperature and humidity of soil surface , sending them to the monitoring centre host PC after packing node ID and data through ZigBee network .Once the moni-tored humidity is lower than the pre-set value , the solenoid valve in the corresponding area is open to sprinkle , mean-while , controlling the pressure filling to keep the pressure of water tank as a constant value .Experiments show that the system can accurately obtain the soil surface temperature and humidity data , achieving designated sprinkling and automat-ic water filling of closed storage water tank .