Research On Iot Atmospheric Environment Monitoring System For Android Client

In recent years,with the continuous promotion of industrial modernization,contaminating gas emissions increased dramatically,the air environmental pollution is being serious,especially the temporal and spatial distribution of city gas pollution of ground atmospheric complicated and the trend of diversification and localization.The traditional atmospheric environmental monitoring system only relied on the monitoring station by artificial sampling and manual analysis,which has not been able to fully and accurately reflect the situation of atmospheric pollution.Thus it is necessary to set up a monitoring system with dense node distribution for the monitoring of atmospheric environment information in real time.The rapid development of the Internet of Things technology and the popularity of Android smart phones in daily life provide the necessary conditions for the design of Android client's Internet of things monitoring system.This paper describes in detail the overall design of the system,which mainly consists of three parts: the data acquisition terminal(monitoring node),the server terminal and the data display terminal(Android App).The data acquisition terminal uploads the collected atmospheric environment information to the server terminal through the GPRS module.The server terminal is responsible for receiving information,classifying and storing information,checking real-time environmental information and historical environment information in a variety of ways,viewing monitoring node distribution,managing of monitoring nodes and staff,and the data display terminal displays the atmospheric environment information to the users in real time by reading and writing the server database and calling the Baidu map API.The specific studies are as follows:(1)In the data acquisition terminal,the control chip LPC2138 will upload the simulate atmospheric environment information to server terminal through the GPRS module after amplification and A/D.The sensors array for collecting information consisted of four kinds of electrochemical gas sensors and SHT10 temperature and humidity sensors.It can collect four kinds of the pollution gas(NO2,SO2,CO,O3)concentration and the temperature and humidity in real time.The data acquisition terminal with the advantagesof small volume,convenient layout can be adjusted according to the functional area,the city's pollution source and detection purposes.(2)At the server terminal,the receiving window receives the atmospheric environment information from the data acquisition terminal in real-time by creating Server Socket for a specific port and then classifies and stores the information in the corresponding table in the database.Meanwhile,the monitoring center can check the distribution of nodes,real-time environmental information,historical environment information,and add,delete,change or check the nodes and the system administrators.(3)The data display terminal is an Android App(Application)developed on the basis of Java language,using the model of client/server,having reading and writing operations to the database table,to achieve the function of user registration and login,location query,mobile phone positioning,data query and display.