基于ZigBee技术的棉田滴灌监测与控制系统

设计开发了基于ZigBee无线传感网络技术的棉田滴灌监测与控制系统。该系统通过无线传感网络实时采集土壤环境信息,使用自适应加权融合算法对各节点土壤湿度数据进行融合,根据融合数据发送电磁阀控制命令,完成实时监测自动灌溉;结合棉花不同生育期对需肥量和施肥浓度的要求,根据灌溉水量设置注肥比例,系统通过无线传感网络实时采集液态肥流量,实时监控施肥量,并根据施肥量发送施肥电磁阀控制命令,完成水肥一体化灌溉。工作过程中,系统可以将传感器采集的数据通过ZigBee无线网络协调器传输给上位机并实时显示和存储。通过试验验证,该系统可以按照设计要求实现灌溉和施肥的自动控制与检测。

Drip Irrigation Monitoring and Control System of Cotton Based on ZigBee Technology

A monitoring and controlling system of drip irrigation in cotton field was designed and developed based on ZigBee wireless sensor network technology in order to save water resources and use fertilizer effectively. The system collected soil environment information in real time through a wireless sensor network. And an adaptive weighted fusion algorithm was used to fuse soil moisture data for each node. According to the fusion data, the control commands were transmitted to the solenoid valve to perform real time monitoring and automatic irrigation. The proportion of fertilizer injection was set based on irrigation water amount, and different requirements of fertilizer amount and fertilizer concentration at different growth stages of cotton. The flow rate of liquid fertilizer was acquired in real time by using wireless sensor network, thereby realizing the monitoring of fertilizer amount instantly. Meanwhile, the control commands of solenoid valve were sent according to the amount of fertilizer, thus the integration of water and fertilizer irrigation was accomplished. During operation, the data collected by the sensors could be sent to the host computer through ZigBee wireless network coordinator, which was displayed and stored in real time. Test results showed that the system could achieve automatic control and detection of irrigation and fertilization in accordance with the design requirements.