Study On Water And Fertilizer Integrated Irrigation System Of Greenhouse Based On Zig Bee Network

The shortage of water resources in agriculture and the unreasonable application of chemical fertilizers in crops cause environmental pollution in China.Water-fertilizer integration technology is a technology of simultaneous irrigation of fertilizer dissolved in water with irrigation water.Many researches have been done on water and fertilizer integration technology at home and abroad.Compared with foreign countries,there is a big gap between China's water and fertilizer integrated irrigation technology.Due to factors such as high foreign equipment prices and soil differences,it is not applicable to China.Domestic research on water and fertilizer integrated equipment is still in the laboratory stage,and there is no general promotion.There are few studies on Zig Bee wireless networking in greenhouses.Therefore,based on the actual needs,this study designed a set of integrated greenhouse water and fertilizer irrigation system based on Zig Bee networking through the research of software and hardware design,control mode,soil information data collection and wireless network transmission.Through the wireless information collection system to complete data collection and transmission,the system control center receives real-time data of soil information,according to different crops,fertilizes on demand,thereby improving crop product quality,improving water and fertilizer utilization,and protecting the environment.The main work of this paper is as follows:(1)System function analysis: The system needs to collect soil information data in real time,and use it as the judgment condition for system irrigation and fertilization;in order to solve the cumbersome wiring problem,the system needs to realize the function of wireless networking communication.(2)System hardware design.According to the system function requirements,the hardware design of the wireless soil information acquisition system and the selection of the sensor,the hardware design of the system control center and the selection of the corresponding actuators were completed;the three-dimensional design and physical installation of the irrigation fertilization pipeline.(3)System software design: In the wireless information acquisition system,the process of acquiring,saving and wirelessly transmitting the sensor data is completed;in the system control center,the Zig Bee module wireless networking communication program and the automatic irrigation fertilization control program are completed.And the software design of the human machine interface.(4)Reliability test design of wireless communication between system control center and wireless information collection system.In order to study the stability of wireless communication between the wireless information collection system and the system control center designed in this paper,it is ensured that the soil information data received by the system control center is reliable,and the system verification test is carried out.The results show that the wireless communication performance between the wireless information collection system and the system control center is reliable.(5)ZigBee module communication network test design.According to the selected Zig Bee module,the influence of different distances and obstructions in the outdoor open environment on the packet loss rate of Zig Bee module is studied.The results show that the open environment is stable from 0 to 300 meters,and the packet loss rate is low,exceeding 300 meters.The Zig Bee module's packet loss rate increases rapidly when there is an obstruction;the Zig Bee module star topology network test is designed to design an outdoor open environment.The results show that the Zig Bee module network communication selected in this paper is stable and reliable within 0-300 meters.Adding a repeater network beyond 300 meters or with obstructions will improve the communication stability of the Zig Bee network.