基于物联网的果园药水肥一体化控制系统设计与实现

Design and implementation of integration of medicine,water and fertilizer control system based on Internet of Things in orchard

针对山地丘陵果园生产作业中,病虫害防治和灌溉工作量大,人工成本上升,同时我国当前施肥模式粗犷、水肥浪费量大、肥液浓度不好控制等问题,结合物联网技术和互联网技术设计一种基于物联网的果园药水肥一体化控制系统。该套系统以基于CC2530的ZigBee节点为基础,结合MCU单片机及各类传感器,通过ZigBee网络实现远程监测和控制执行模块执行各种功能,同时采用模糊控制对水泵进行精准控制,实现对果树的精准施药、施肥和灌溉,并进行试验验证。结果显示,ZigBee网络的丢包率与距离没有明显关系,与上位机软件发包频率有一定关系;系统能够实现远程监测与自动控制,实时显示空气和土壤湿度、EC值和pH值等监测数据;混合药池的EC值经过系统调节690 s左右,达到设定值1.5 ms/cm,土壤EC值经过系统调节810 s左右,达到设定值1.2 ms/cm附近;同时系统根据不同的土壤EC值与混合药池EC值执行不同的灌溉方案与混肥、施肥方案,精准控制灌溉施肥,有较好的稳定性。

In view of the large workload of pest control and irrigation and the increase of labor cost in the production of mountainous and hilly orchards,at the same time,the current fertilization mode in China is rough,the waste of water and fertilizer is large,and the concentration of fertilizer solution is not easy to control.Combined with Internet of Things technology and Internet technology,an integrated control system of orchard medicine,water and fertilizer based on Internet of Things is designed.The system is based on ZigBee node based on CC2530,combined with MCU and various sensors.Remote monitoring and control are realized through ZigBee network,and the execution module performs various functions.At the same time,fuzzy control is used to accurately control the water pump to realize precise fertilization and irrigation.Through experimental verification,the packet loss rate of ZigBee network has no obvious relationship with the distance,and has a certain relationship with the contracting frequency of host computer software.The system can realize remote monitoring and automatic control,and display the monitoring data such as air and soil humidity,conductivity value and pH value in real time.The conductivity value of the mixing tank is adjusted by the system for about 690 s to reach the set value of 1.5 ms/cm.The soil conductivity value is adjusted by the system for about 810 s to reach the set value of 1.2 ms/cm.At the same time,the system implements different irrigation schemes,fertilizer mixing and fertilization schemes according to different soil conductivity values and mixed medicine pool conductivity values,accurately controls irrigation and fertilization,and has good stability.