Design And Implementation Of Dynamic Configurable Agricultural Internet Of Things System

The agricultural Internet of Things technology plays a good role in promoting the development of modern precision agriculture,and its technical solutions are also constantly developing.At present,the development mode of most agricultural Internet of Things systems is "one application,one development".The scalability and reusability of the system are weak,and the technical threshold is high,which indirectly affects the cycle and cost of the research and development.Based on the general embedded computer architecture,by analyzing and extracting the common technologies of the agricultural Internet of Things,this thesis proposes a dynamic configurable agricultural Internet of Things system design scheme and puts it into practice.The prototype of the agricultural Internet of Things system based on the Narrowband Internet of Things and the wireless sensor network technologies can be quickly constructed,providing a basis for secondary development.The main work is as follows:(1)By extracting the commonalities of the agricultural Internet of Things system,taking the RISC-V kernel CH571 microcontroller launched by Nanjing Qinheng Microelectronics in 2021 as the core and the NarrowBand Internet of Things communication module ME3616 launched by Gao Xinxing IoT in 2017 as the remote communication medium,and following the component-based design principle of software and hardware,an agricultural Internet of Things system terminal with tailorable and configurable functions is designed that can cooperate with the configuration software running on the PC.(2)In view of the nonlinear characteristics of many sensors and transmission systems,which leads to the nonlinear relationship between the analog-to-digital conversion of microcontroller and the regression of actual physical quantity,this thesis proposes a scheme of physical quantity regression using BP neural network,and establishes a unified mathematical expression of physical quantity regression,which can realize the user’s independent dynamic physical quantity regression and sensor aging correction.(3)For the terminal,cloud monitoring program,and web page,the configuration software running on the PC is designed,which mainly realizes three functions:first,the configuration of the IP address and port of the terminal communication,adding sensors,recompiling,downloading,etc.;second,the configuration of the IP address and port of the cloud monitoring program,adding sensor fields,etc.;third,configuration of web page interface style and chart style,etc.The cloud monitoring program and web page are designed based on the common software in the early stage of the laboratory.The cloud monitoring program can communicate with terminals and clients and store data.The web page program has the functions of data interaction with cloud monitoring program and the terminal,data visualization,information query and so on.The software and hardware template and configuration software given in this thesis can realize the simple agricultural Internet of Things system that can be run without programming.On this basis,it can carry out secondary development,reduce the technical threshold,and provide a quick scheme for the development of many personalized agricultural Internet of Things systems.