Design And Implementation Of An Agricultural Information Collection And Control System Based On Embedded Technology

Agricultural information collection and control system is an important part of modern agricultural research.Based on the embedded platform,we designed a set of agricultural information collection and control system.The main functions of the system are the real-time monitoring of main parameters in the agricultural planting environment,the automatic control of control equipment,and the scientific management of users.Our main research content is as follows:1.According to the current mastery of agricultural information acquisition and control technology,following the requirements of greenhouse planting,taking flower cultivation as an example,we have completed the analysis of the impact of environmental parameters on agricultural planting.We also completed the specific design requirements of the host computer,server,and lower computer of this system;2.We designed the mode of hierarchical control of the host computer,server,and lower computer.For the upper computer,we have realized human-computer interaction,which specifically includes human data monitoring,control management,and equipment management;For the server,we completed the design and database design of intelligent control algorithms;For the lower machine,we have completed the collection and control of environmental parameters at the planting site;3.We analyzed the system’s requirements for the database and designed the system database using MySQL.We have established a user information sheet,an environmental parameter sheet,a planting parameter sheet,and a device status sheet.We have completed the data storage and modification,and the system’s data is well managed;4.After analyzing the advantages and disadvantages of the principles of PID control and fuzzy control,we designed a PID control algorithm based on fuzzy controller.It is both flexible and accurate.In addition,we use Matlab to simulate our control algorithm and verify the feasibility of our algorithm;5.We use an embedded microcontroller as a development platform to implement multiple functions for the user to interact with the host computer.In this way,users can monitor the site’s environmental parameters in real time,and can query historical data.Users can also choose intelligent control or manual control in combination with actual conditions.This will ensure the stable operation of the system;6.After we set up the test environment in the lab,we tested the system.The test results of the system accuracy show that the temperature error is about 0.3 and the humidity error is about 1.2%,which meets the requirements of the system design.The result of the test of the system function shows that the function of each module can indeed be manufactured.Moreover,our algorithm reduces the steady-state error by 2.8%compared with the ordinary fuzzy PID algorithm.The test results of the system performance show that our system has better stability and reliability.In this paper,the agricultural information collection and control system we designed has the features of clear division of function modules and low coupling.It combines variable structure fuzzy control and PID control algorithm to solve the problem of difficult mathematical modeling and low control accuracy.The system also reduces the steady-state error of the system control.The system can monitor and control the data of the planting environment.This achieves the design goals of the system.It provides a theoretical and practical basis for the intelligent regulation and research of greenhouse environment.