In view of the characteristics of current indoor air purifier function is single and the automatic regulation ability is weak

an improved Kalman filtering system is designed to predict the concentration of PM2. 5

which provides a reliable regulation parameter for air purifier. The S3C2440 chip is used to collect PM2. 5concentration and temperature

and analyze on historical data. On the basis of the system

through the improved Kalman filter to fuse historical data

PM2. 5 concentration and temperature can be accurately obtained concentration at the next moment. The results of test show that the system runs stably with its effective algorithm

strong robustness

and it can accurately predict the PM2. 5 concentration at the next time point. The prediction error is less than 2. 0 %

which can meet the requirements of design.