Design And Implementation Of Air Quality Monitoring System Based On Internet Of Things

Air is the necessary condition for human survival.Air quality is closely related to human health.However,with the development of industrialization,air quality is getting worse and worse.In order to improve the living environment,it is necessary to establish a systematic and perfect air quality monitoring system.An intuitive and comprehensive understanding of the current air quality will help people to raise awareness of environmental protection and practice environmental protection actions.In addition,it is also of great significance to guide daily production and life.At present,many large-scale monitoring stations have been set up in our country,which mainly monitor urban air quality.Because of the fixed location of state-owned monitoring stations and limited monitoring area,the application of forecast data has certain limitations.Under the current severe air quality situation in China,a new monitoring network must be designed to meet the needs of the new situation.Based on Internet of Things technology,embedded technology and WebGIS technology,a set of air quality monitoring system is designed and developed,which can realize real-time collection and upload,unified management and real-time release of air quality data.(1)The air quality monitoring system mainly includes two parts:hardware monitoring terminal and software management service platform.The hardware monitoring terminal is responsible for collecting and sending the concentration of environmental air pollutants to the remote server.The software management platform stores the collected data and provides users with real-time air quality status query and other related services through automatic analysis and processing.(2)Semiconductor Corporation uses 32-bit embedded microcontroller STM32F103 based on ARM Cortex-M3 core as control core.SO2,CO,O3,NO2 and other gases use high-precision electrolytic gas detection sensors with fixed potential.PM2.5,PM10 and other particulates use high-precision sensor modules based on laser scattering principle to collect six air quality indicators,terminals and services.Data communication between devices is accomplished by wireless communication.(3)The software management service platform uses MVC design architecture to separate business logic,data and interface display.GeoServer server and MySQL database server are built to provide geographic services and data services,and to complete the query and unified management of real-time and historical data.GeoServer servers provide GIS services for the system,and MySQL database servers store data collected by terminals.The front-end uses OpenLayers plug-in and Ajax technology to realize map display,spatial and attribute query and other functions.(4)Finally,the system is tested.The results show that the hardware system functions normally,interacts well with the software system,and the modules of the software system run steadily,which meets the overall design requirements.