Design And Research On Indoor Air Quality Monitor Based On STM32

China is right at the rapid economy development period, with the expansion of industrial scale,the environmental pollution problem also become serious.In recent years,with the improvement of people’s environmental protection consciousness,more attention were paid on the impact of indoor air pollution on human health.In our country,the indoor air pollution is mainly due to the low standard of building materials, large number use of air conditioning and inhalable particles,the inhalable particles mentioned before mainly refers to PM2.5.Researches have shown that the damage to human body caused by haze weather more than the sandstorm did.At present,most of air quality monitoring products on the market are expensive,massive,poor portability,determination cycle too long,sometimes even need professional to operate them so they can’t widely used.This paper designed a high ratio of indoor air quality monitoring system,the purpose is to improve people’s quality of life,allowing people to monitor the situation of indoor air quality in real time.This thesis carried out and completed the following works:1,First of all,according to the market demands,the paper puts forward overall design scheme of air quality detection system;2,Secondly,according to the overall design scheme,complete the design of the system hardware,such as,the sensor selection and circuit design of sensors and CPU selection,MP3 circuit design and other peripheral circuit design,etc.3,Thirdly,on the basis of the hardware design,this paper completed software development and mainly using the embedded real-time OS μC/OS-II and embedded graphics system μC/GUI to implement the system of each module driver.4,In the end, debugging and testing the whole system,then calculate every sensors measurement accuracy according to the collected data and completed data fusion based on BP neural network algorithm and grey correlation analysis of the two levels of data fusion.Finally,write a indoor environmental quality report,summary of the work,put forward the improvement of the deficiencies of the system.