Research Of Water-saving Irrigation System Based On MCU

Water is closely related to the daily life of human beings.With the rapid economic development and the dramatic increase of population,the issue of water shortage has become increasingly prominent.According to the survey,as one of the 13 least-resourced countries in the world,China ranks 121st in the world.China's agricultural water consumption exacerbated the problem of waste of water resources.In our country,there is a widespread irrigation method for slow flood irrigation.This method not only seriously wasts water resources but also lowers irrigation efficiency.Therefore,vigorously developing water-saving irrigation agriculture is an urgent requirement to solve the crisis of agricultural water supply and one of the effective measures to solve the water resources problem.With the development of automatic control theory and the progress of agricultural irrigation technology,the water-saving irrigation system has become a hot topic in agriculture.In this paper,according to the general process of agricultural irrigation,each step of the agricultural irrigation system is studied step by step.Finally,through technical analysis and test,a control system of agricultural water-saving irrigation based on single-chip microcomputer is designed.This paper studies the main technical means in the field of water-saving irrigation and the research bottlenecks;the advantages and disadvantages of different control algorithms are compared to determine the fuzzy algorithm as the system of irrigation control strategy;use WMRNET wireless module for data transmission to meet the irrigation system requirements for data transmission distance;DHT11 was used to test the soil moisture,and the hardware and software design of the soil moisture acquisition part was carried out;by analyzing the system functional requirements,this paper choose ATmega64 microcontroller as a system controller;using Dacai serial port screen module as a system operation and display interface to complete the network node query,irrigation process query and set soil moisture and other functions;the system regularly query the soil moisture data,compared with the set value,if the soil moisture is not within the set range,the irrigation time is calculated according to the fuzzy control rules,and then send the irrigation signal to the implementing agency through the wireless transmission module to complete the irrigation.This system can irrigate according to the water requirement of the crop,has the functions of real-time display of soil moisture,warning information and irrigation process inquiring.Due to the fuzzy control strategy,the whole system has high control precision and adaptability,and the parameters change to the system is small.The system not only promoted the development of intelligent water-saving irrigation,but also provided the reference for the following researchers.