Research And Implementation Of Intelligent Water And Fertilizer Integration System Based On Field Fixed Pipe Network

With the progress and development of science and technology,the traditional fertilization and irrigation methods can not meet the needs of modern agriculture.Using science and technology to realize the integrated control of farmland water and fertilizer is the inevitable requirement of modern agricultural development.In China’s modern agricultural planting,water and fertilizer integration technology is booming,but the water and fertilizer integration system for field crop growth and cultivation is still being tested and popularized.Firstly,agricultural field is an open-air environment,which is difficult to control environmental variables such as temperature and light;Secondly,there are too many environmental variables in the field,so it is difficult to obtain the response law of water and fertilizer of field crops,so as to establish the fertilization model;Third,at present,drip irrigation belts are mostly used as sprinkler irrigation facilities in the field,but the number of Topdressing of field crops is less,and the benefit of laying field drip irrigation belts is low.In view of the above factors,this paper designs a set of intelligent water and fertilizer integration system based on field fixed pipe network for field crop cultivation,combined with water and fertilizer integration technology,Internet of things technology and fuzzy PID control algorithm The following key technical work has been completed Content:1.Overall system design.This paper introduces the sprinkler irrigation system of field fixed pipe network,analyzes the functional requirements of water and fertilizer integration system,and designs an intelligent water and fertilizer integration control system based on field fixed pipe network,including hardware design and program design of the system,research on water and fertilizer concentration control algorithm,HMI touch screen design,development of monitoring cloud platform,etc.2.System hardware design and development.Reasonably select the system hardware according to the control requirements of the system;Then according to the system control function requirements,combined with the fuzzy PID controller,the PLC hardware control program is designed.3.Design the precise control algorithm of fertilizer concentration.Analyze the structure and working principle of pipeline equipment of water and fertilizer system,plan the input and output and fuzzy relationship,obtain the concentration deviation value,concentration deviation rate and corresponding parameters,and then design the system fertilizer mixing model.The fuzzy control model is established with MATLAB software,and then the steady-state accuracy of the two models under Fuzzy PID control algorithm and ordinary PID control algorithm is compared to verify the effectiveness of fuzzy PID control algorithm.4.System monitoring software design.The human-computer interaction interface and monitoring cloud platform are designed.In the design of human-computer interaction interface,the functional requirements are analyzed,and then the development of each functional interface is realized;The monitoring cloud platform completes the design of the software architecture,database and functional modules of the software.5.System implementation and test analysis.Completed the development of the monitoring cloud platform of the field intelligent water and fertilizer integration system,and explained the main functional interfaces in the platform;The precision control accuracy of water and fertilizer concentration is tested on the field device of water and fertilizer integration system.Combined with the test result data,the effectiveness of fuzzy PID control algorithm is verified.