Design And Research Of Low Power Indoor Air Quality Inspection System

Air quality has always been a hot topic in the society in recent years,and with the emergence of fog and haze is more and more frequent,people pay more and more attention to the quality of the air. In addition,with the continuous improvement of people’s living standard,household decoration,furniture and the replacement of decoration are becoming more and more frequent,the concomitant harmful gas such as volatile organic compounds are also endangering people’s health. So the indoor air quality problem is closely linked with our life,and how to effectively prevent and reduce the harm of indoor air to our life is also particularly important. In view of the present indoor air quality product which is expensive,single function and power quickly,with low power consumption and indoor air quality detection for the breakthrough point,a kind of intelligent air quality detection system is designed.The research is based on the chip of STM32F030,and the surround circuit including minimum system circuit,the gas sensor circuit,power supply voltage conversion circuit,battery charging circuit,alarm circuit,bluetooth circuit and other auxiliary circuit is designed. According to the BLE technique,the low power consumption circuit is designed. In the light of the working principles of gas sensors,the algorithm design and software design of the system are given,which could detect the TVOC gas,formaldehyde gas,PM2.5 and humiture in real time. People could also know the current status of air quality in time through the bluetooth and do a good job under the corresponding of protective measures.In this paper,more voltage sources are joined to the hardware circuit to reduce the power consumption of the system. In the software design,the work mode of MCU is used effectively to reduce the power consumption. According to the current air status for data analysis,evaluation algorithm which could predict the future state is added to reduce the power consumption. Through the actual detection and analysis of indoor air quality,the accuracy and sensitivity are achieved the desired requirements.