Design Of The Aerosol Haze Early Monitoring System Based On Wireless Sensor Network

With the acceleration of China's industrialization process, the manufacturing process will inevitably use a large number of chemical raw materials, produce large amounts of polluting gases at the same time. In recent years, the rapid development of China's economy and the automotive industry as well as the continuous improvement of people's living standards, leading to the increasing cars in the city, and the gas pollutions such as SO2, NO2 and so on has increased dramatically in the atmosphere of many cities. Due to a large number of polluting gases diffused into the air, resulting in most of our provinces and municipalities have serious fog and haze, seriously affecting air quality and people's health. Therefore, the design for an urban atmospheric haze monitoring system is of great significance.In this paper, through the analysis of the domestic and international monitoring methods of SO2 / NO2,and reserch the development of wireless sensor network technology, combined with the actual needs and national requirements related industries, designed the city atmospheric haze monitoring wireless sensor networks system. The system used a star network topology, the communication protocol was optimized by using the synchronous dormancy mechanism. By using AFSA optimizes,the number of monitor terminals was reduced and network coverage was improved.The system's hardware is based on STM32f103zet6 processor, designed monitor terminal?a relay node monitoring and smart handheld terminal. The entire system hardware level drivers are be written on Keil platform. Relay nodes for remote data transmission via wireless bridge to ensure the monitoring center can be real-time monitoring. Handheld terminal can transfer data taken near the area monitoring terminal monitors facilitate viewing.The software part, the monitoring center interface using Visual C ++ development platform, providing real-time data monitoring terminal change and alarm of exceeds a preset threshold, has function of historical data query and so on.Testing the technical indicators for the design of complete systems, environmental testing laboratories and test the system communication network. By the test results indicate: the system fully meet the relevant industry standards and actual demand, simple operation, stable running. Through the network optimization, can effectively reduce the power consumption of the system, and extend the system working time. In this paper, The monitoring system in this paper meet the design requirements, has the good market application prospect.