基于云平台的智能精量水肥灌溉控制系统设计

The Design of Water and Fertilizer Intelligent Precision Irrigation System Based on the Cloud Platform

进行了基于云平台、PLC及HMI技术的自动灌溉控制系统的设计,考虑到不同类别、不同生长阶段的植物对不同肥料元素的需求量不同,采用肥路与水路流量实时调节控制技术来实现不同肥素浓度的精准配比,研究在普通PID控制策略的基础上应用了灰色预测模糊PID灌溉控制算法来提升水肥控制的精度,融合EC、p H传感技术,形成反馈回路,保证混合液中设定植物所需EC、p H值的检测精度。研究精量水肥灌溉控制系统功能需求,开发了一套客户端智能控制组态软件,可实现人机互动、灌溉监控、数据存储、数据查询等功能,采用基于WIFI或GPRS的数据无线传输技术,完成了水肥灌溉设备与物联网云平台的通讯,具有电脑、手机、微信多终端的灌溉数据监测和开关量控制的功能,实现了水肥灌溉设备的信息化、无线化、智能化、小型化。

An automatic irrigation control system is designed based on the cloud platform, PLC and HMI technology. Considering that the demands of different fertilizer elements are not the same for different types or different growth stages of plants, the real-time regulation technology of fertilizer flow and water flow is used to achieve the ratio of different fertilizer elements. Besides, to enhance the precision of water and fertilizer ratio, gray prediction fuzzy PID irrigation control algorithm is used on the basis of ordinary PID control strategy. What＇s more, EC and pH sensing technology is used as a feedback to ensure that the EC and pH values of the mixture are within the range of plant requirements. Considering the functional requirements of precision irrigation and control system, intelligent control software is developed to achieve human-computer interaction, irrigation monitoring, data storage and data query. Irrigation equipment can achieve communication with T-link cloud platform based on Wi-Fi wireless transmission technology and the user can monitor the irrigation data and control the switch through the computer, mobile phone and Wechat, which shows that the mechanical equipment is developing towards informatization, wireless intellectualization and miniaturization.