Research On Key Techniques Of CPS-based Agricultural Remote Monitoring And Control System

With the continuous development of computer technology and the advancement of agricultural information,our country's remote monitoring and control system of agriculture develop quickly on technology.The aim of building an agricultural remote monitoring and control system is to optimize the production and management of agriculture,improve the quantity and quality of crop,reduce the work burden of farmers,and provide service for the people who work in the field of agriculture.From the point of the development of agricultural remote monitoring and control system at this stage,because of the expensive maintenance cost and less of the professional administrator of the system,it cannot be promoted comprehensively among the farmers,so it will stay in the test stage for a long time.Since agriculture is the main industry in China,the speed and degree of agricultural development affect the economic development of our country directly.In the past 20 years,the agricultural labor of our country declines continuously,and the agricultural population outflows gradually.In order to ensure the added value of agriculture and the production of food of our country,advanced technology and management system should be introduced widely,to truly realize the modernization agriculture.This paper raised the agricultural remote monitoring and control system which is based on CPS,which provides the service for all of the farmers and agricultural field workers.This architecture emphasizes the combination of the physical world and the cyber world,and it can provide the rental model monitoring service which deploys on cloud platforms.The main content of this paper includes:1.Build the architecture of CPS-based remote monitoring and control system of greenhouse.CPS is a system which emphasizes the tightly coupled between physical world and cyber world,the sense of physical world,the feedback of cyber world,the large amount of information and the processing of information.It helps to improve the system architecture,meet the needs of users,break the traditional thinking of agricultural monitoring and control system that apply the prototype architecture of CPS on the remote monitoring and control system of greenhouse,which can be seen an application example of agricultural monitoring and control system.2.Realized the communication between the physical world and cyber world based on the architecture of CPS-based remote monitoring and control system of greenhouse.The terminal node which can be deployed in the field compatibly and the wireless communication gateway of ZigBee-3G which can be used in the field compatibly are designed.And then the data collection,processing and communication status of the node and the capability of the gateway are tested.3.Decision control unit is one of the most important components of CPS system,we apply fuzzy control to it and designed fuzzy controller.Then build fuzzy control system model and PID control system model of the greenhouse by Simulink and compared the simulation result generated by the two models.4.Put forward a new mode of agricultural service combined with the characteristics of CPS and cloud services and the shortcomings of the existing monitoring and control system,this service can be called rental service.Rent is one of the most important methods to reduce cost,and multi-tenancy is the core technology of SaaS.According to the key points of realize multi-tenancy,we analysis the existing applications,realize data isolation,realize data configuration and design interface prototype to conclude the multi-tenancy application feasibility in the system.For the user,the CPS-based agricultural monitoring and control system is different from the existing system,which emphasizes the rent of software and the centralized management.Users only need to pay the rent instead of buying the software and the server and employing the professional person to manage the system.The provider is responsible for the system's maintenance,management and upgrade.This service model reduces the cost for users greatly,whether the farmers,the testing ground,or the agricultural garden,all can be the user of this system.For the expert of agricultural field,the massive agricultural information collected by this system will be the important support for their research.