The Design And Experimental Research Of Water Saving Irrigation Control System For Rice In Cold Regions

With the water resource increasingly tense,the world's big responsible countries are actively seeking effective ways and measures for water-saving.Rice is the second biggest cultivated area and output in the world after the main refined grain crops of wheat,the water consumption is huge.Therefore,it is urgent to put forward the theory and method of efficient use of rice water.The China's rice consumption in the whole growth period accounts for 65% of the total water consumption of agricultural irrigation,is the largest water users in China's agricultural water use,the water-saving irrigation measure and technique to reduce agricultural waste,which is urgent and necessary.The northern region of rice cultivation,especially in Sanjiang plain region geography position belongs to temperate humid,semi humid continental monsoon climate region,with a large capacity but less abundant water resources,also a drop in groundwater level and a lack of development potential.In the China's northern rice cultivation area,especially in the Sanjiang Plain region is geographically arid and semi-arid areas,with a large capacity but less abundant water resources,it has a drop in groundwater level and a lack of development potential.The Sanjiang plain is the important agricultural production base in China which is large,flat and neat,therefore,the article focus on the Sanjiang plain terrain,soil and climate characteristics,Based on the analysis of the water use law under the conditions of rice irrigation in Sanjiang Plain and the experiment conducted in Honghe Farm in Heilongjiang Province from 2013 to 2016,established the Honghe farm rice requirement and meteorological factors relationship model,the quantitative analysis of environmental temperature,relative humidity,wind speed and sunshine time influence on rice water requirement through the data-fitting technique,and in-kind production,based on the proposed model of paddy field water use and the GALM hybrid algorithm,the paper studies the automatic control system of water saving irrigation in cold region.,the related results are as follows.1)Study on the theoretical system of rice water use model and algorithm in cold region,and provide scientific basis for improving the efficiency of agricultural water use and the large area of rice field irrigation management.2)The daily temperature,daily average humidity,daily wind speed,sunshine hours and solar radiation are taken as independent variables,and the daily water consumption of rice is taken as the dependent variable.The multiple regression equation of 5 input and 1 output is established.In this paper,a new method of high order multivariate polynomial modeling is proposed,which is based on the data of each growth stage.3)A hybrid learning model based on genetic algorithm and LM optimization algorithm is established,and the GALM algorithm effectively combines the advantages of the two methods.The experimental results show that the GALM hybrid algorithm improves the convergence speed of the network,and it is better than other algorithms in the rate of false positives.The GALM network achieves the predetermined error through 358 steps,the maximum absolute error is about 0.1720,and the average absolute error is about 0.0434.4)Design of water-saving irrigation controller with high intelligent chip as the core,the fixed frequency on rice growth period around the environmental temperature and humidity,solar radiation,sunshine duration,wind speed,rainfall,daily evaporation,soil heat flux,different depth of soil temperature factors such as data acquisition,and in accordance with the genetic LM algorithm and optimization model of irrigation based on hybrid learning algorithm.The water saving irrigation controller is designed with low power consumption and distributed control mode,which can work independently.5)The design of water saving irrigation monitoring platform suitable for paddy field in northern China was carried out.The platform hardware equipment has the advantages of small footprint,easy operation and low energy consumption.The platform software has the functions of real-time data monitoring,historical data query and analysis,irrigation information prediction and so on.It can also be used in the field of irrigation controller.After testing,the communication distance can be realized in 2800 m,the data transmission accuracy is 100%,and the system has good anti-jamming performance.Through the actual test of the overall performance of the site,to the device on the power,press the start button 10 s began to receive a variety of terminal sensors to collect the data,and in the 5S to complete the outgoing data.After the host computer receives the data,the data can be fused and forwarded in 20 s.The control data can also be displayed on the mobile phone or other wireless terminals,and can be controlled in real time by the mobile phone or other wireless handheld devices.The utility model has the advantages of fast response speed and high control efficiency.6)Tests were carried out in a number of farm field.By comparing the control irrigation and artificial full irrigation,the contrast test results show that the average consumption of water was 37.68 percent,the average grain output increased by 6.47 percent,the increase in income was 148.97 yuan per acre,the cumulative value of the three years increased by 435 thousand and 100 yuan,and the application prospects were broad.