Design Of Multi-parameter Portable Production Monitoring And Management System For Canal Irrigation

With the popularization of Internet of things technology,national water-saving technology is developing well,and the construction of farmland water conservancy projects is actively promoting technological innovation.At present,most agricultural irrigation scenarios still adopt manual handheld equipment field test and saturated ditch irrigation,which obviously does not meet the needs of intelligent agricultural production.In this paper,a multi-parameter portable production monitoring and management system for ditch irrigation is designed.It is an intelligent monitoring equipment with ditch irrigation infrastructure.The system features include:large coverage radius,ultra-low energy consumption,high precision,portable acquisition,multiple monitoring,and intelligent control.The main research contents of this paper are summarized in the following aspects:(1)This paper introduces the development of agricultural plant-related parameter collection methods and ditch irrigation methods at home and abroad,and designs a three-layer Internet of things model of perception layer,network layer and application layer.Soil temperature,soil relative humidity,light intensity and carbon dioxide concentration were selected as the sensing quantities by consulting the planting influence factors.The acquisition node and the aggregation base station are located in the physical perception layer,respectively mounted on the Arduino processor and STM32F103C8T6 microcontroller,and reasonable peripheral circuits should be designed.The communication mode between nodes is LoRa,and the data collection,aggregation,upload and threshold humidity control tasks are completed as a whole.(2)In the system network layer,esp8266 module through the reuse,at the same time to undertake data upload and distribution and control the task of driving.The data is uploaded to the server through WiFi and MQTT protocol.The base station equipment and the PC host are the publishers and subscribers to each other.The application layer of the system includes the distributed monitoring system on PC and the small program of WeChat on mobile.The main task is to monitor the collection parameters in real time and set the humidity control information through the data curve.(3)According to different precision requirements,the system designs two kinds of humidity control methods:the threshold control method and the adaptive Fuzzy-PID control method.The threshold control method is used to meet the humidity control requirements of general scenes.In higher application scenarios,the Fuzzy-PID method can achieve the control effect of "high deviation quick response,low deviation stable response",effectively improve the lag and accuracy problems existing in ditch irrigation,and play a positive role in water-saving irrigation.Through the system function test and communication test,the integrity of the system implementation is verified.The data upload and monitoring system can be completely realized.The reliable communication distance of LoRa communication is 2.4km,and the error of data collected by the sensor is within a reasonable range.From the results of 24 hours’ relative humidity control and water level test,it can be seen that threshold control has a certain effect on water-saving irrigation,but there is also a lag problem.Simulink simulation verified that the designed Fuzzy-PID control of the oscillation,stability and rise time are smaller,can effectively improve the accuracy and lag problems,can be applied to similar water conservancy research,green planting and drought prediction and other precision agriculture fields.