Research And Implementation Of Indoor Air Quality Monitoring System For Smart Home

With the rapid development of technology,people's living standards have been greatly improved.But at the same time there are problems of indoor environmental pollution,seriously affected people's physical health.Currently,in order to monitor the parameters of indoor harmful gases in real time.Embedded technology,sensor technology and IoT technologies are constantly improving and developing.However,there are still many problems to realize popularization of indoor air quality monitoring system in smart home system.The main reasons include expensive price,unstable signal transmission,low detection accuracy,and unresponsiveness,etc.In view of the above questions,this scheme designed a smart home indoor air quality monitoring system with many advantages,such as low cost,high detection accuracy and stable signal transmission.Firstly,the overall design scheme of the smart home system was given in this paper,the PC was used as the main controller,and the data transmission between the nodes was carried out by Zigbee Wireless communication network,users can monitor the internal environment of the home by accessing the family gateway server.Secondly,as a subsystem of intelligent home system,air quality monitoring system was the key research content of this subject,which is used to collect various indoor environmental parameters.The hardware of the system mainly introduced the circuit design of the air quality monitoring system,and STM32F103 was selected as the core microprocessor,to control the circuit of each sensor acquisition module,the circuit of LCD display module,the circuit of ZigBee wireless communication module,etc.The system taked the embedded real-time operating system uC/OS-II as the software development platform,the method of modular programm was adopted to realize various tasks such as tasks for various sensors,LCD display task,and acoustic light alarm task,etc.QT was selected to design the upper machine monitoring interface,to achieve remote viewing of indoor air quality parameters.Finally,the overall hardware circuit was tested,including motherboard test and display module test,etc.Through the performance experiment of air quality monitoring system,the results showed that the monitoring system not only meeted the requirements of technical specifications in the main performance of measuring range,response time and error range under experimental conditions.At the same time,the data of multiple sensors could be collected in real time,which has the characteristics of high monitoring precision,low price,stable signal transmission,timely response and so on,and the market application prospect is better.Figure [47] Table [23] reference [60]...