A Study On The Air Quality Monitoring System Based On Wireless Sensor Network

With the development of economy,science and technology,the urban construction in our country develops rapidly,and then the problem of urban construction has become more obvious,such as the problem of air pollution.China has made the strategic layout of the wisdom urban construction in response to these problems the urbanization brings.As an important practice of wisdom urban development,air quality monitoring is the precondition of solving air quality problems,and has a huge role on environmental protection.It’s traditional to monitor air quality by the atmospheric environmental monitoring station.However,it’s difficult to spread over a large area in the whole country,because the atmospheric environmental monitoring station is complex,expensive.This paper researches the wireless sensor network,and builds a set of air quality monitoring system based on wireless sensor network,and innovatively puts forward an algorithm to improve the precision of air quality measurement.The system covers collection terminals,mobile client and the server side.It can monitor air quality accurately and real-timely,satisfy the individual demands for air quality information,and provide the necessary information for the relevant government departments to formulate environmental protection strategy.The main research contents are as follows:(1)The paper designs an air quality monitoring system based on wireless sensor network.It carries on the demand analysis and overall design to the system.Environmental information collection terminal collects the information of gas pollutants and dust concentration,and uploads data via wireless network to the mobile client and the server.The mobile client provides users air quality information to query and display,and satisfies the individual demand for air quality information in time.The server provides data support for the mobile client and Web users.(2)The paper designs and implements the hardware system of data collection terminal.The paper chooses the Arduino platform as the development platform,and designs the hardware circuit and programming of data collection terminal,including the development of sensor module,bluetooth module and so on.The experimental results show that the data acquisition terminal can monitor air quality real-timely.(3)The paper studies algorithms to improve the precision of air quality measurement in wireless sensor networks.Based on Granger causality and multiple regression analysis,the algorithm can improve the precision of air quality measurement.The results of the two weeks’ air quality monitoring experiment in Hangzhou verify the correctness and validity of the algorithm.(4)The paper implements the development of air quality monitoring system platform.The positioning module,interacting with the server module,data analysis module of mobile client are designed and implemented,and the data storage function,Web querying function of the server are designed and implemented.The results of platform experiment show that the data acquisition terminal and the mobile client and the server can work effectively and normally.