Design And Implementation Of Automatic Irrigation System In Sewage Irrigation Area

With the development of the times and the large-scale expansion of the population,the shortage of energy,the reduction of cultivated area,and the pollution of the atmosphere and water and soil environment have intensified.Therefore,human beings pay more attention to the pursuit of resources,environment and sustainable development.In the case of an increasing shortage of natural resources,the automatic irrigation method of saving water and energy has become the general trend of irrigation technology development around the world.In the automatic irrigation system,irrigation control according to different water requirements in the crop growth stage is of great significance for improving the effective use of water resources,implementing water-saving irrigation,improving grain yield and quality,and promoting the sustainable development of natural resources.This paper combines CAS theory to model and analyze the irrigated crops,and uses Zig Bee and GPRS transmission technology to build a wireless sensor network,collecting environmental information in the sewage irrigation area and automatically irrigating according to the optimized irrigation scheme.The main research contents are as follows:(1)A wireless tree sensor network based on Zig Bee technology was designed and implemented.The node transmits the information collected by the sensor to the coordinator through the Zig Bee network,and the coordinator transmits the data to the GPRS module through the RS-232 serial port,and the GPRS module transparently transmits the data to the remote host for display and storage through the Internet.(2)Establish a water resource allocation system for sewage irrigation areas,with the goal of economic benefit,social benefit and environmental benefit,optimize the allocation of water resources,and bring the parameters of the farmers' resources after the deployment into the soil and water crop system model of the sewage irrigation area.According to the different subjects involved in the soil and water crop system in the sewage irrigation area,the characteristic parameters in the complex adaptive configuration process were screened,the main characteristics and behavior rules were set,and the soil and water in the sewage irrigation area under the change of irrigation water conditions were established.The crop system model analyzes the changes in crop yield quality,water demand,and soil properties,and proposes an optimized irrigation scheme.(3)System hardware selection and design.For the hardware design of each node in the wireless sensor network,the core processor uses the CC2430 RF chip.Soil moisture information collection uses FDS-100 soil moisture sensor,water quality testing involves multi-parameter measurement,MF53 thermistor is selected as temperature sensor,and conductivity sensor,JYD-1A dissolved oxygen analyzer,PHB-1 p H meter and turbidity sensor Collect irrigation water pollution information.The flow control module is designed to collect and control the flow of irrigation water through relay control of the electric butterfly valve.In order to save energy,the power module uses solar panels,supplemented by batteries to provide energy support for each node in the system.(4)Software design of the system.Design automated irrigation system irrigation strategies and microcontroller programs.The system records the date to determine the growth period of the crop,and monitors the quality of the waste water through the water quality sensor.The program calculates the ratio to the purified water and mixes it as irrigation water for use.The soil moisture sensor is used in the farmland to judge whether the crop needs irrigation behavior.After determining the amount of irrigation water,the flow module is controlled to be watered to realize automatic irrigation.This study introduces CAS theory into the automatic irrigation system,which provides a new idea for the rational allocation of limited resources in the sewage irrigation area.It is of great significance to improve the effective utilization of water resources,implement water-saving irrigation,and achieve efficient and refined agriculture.