RESEARCH AND DESIGN OF AIR QUALITY MEASUREMENT EQUIPMENT

Abstract

This paper presents the process and results of designing an air quality measuring device based on the evaluation of the AQI index (Air Quality Index). This compact device has 4 sensors for gas concentration (SO2, NO2, CO, O3), super fine dust PM2.5… The system design focuses on: STMicroelectronics ARM Cortex STM32F103 microcontroller operating with 3.3V voltage, the sensors operate with 5V voltage. The microcontroller reads sensor data, calculates AQI, processes and encapsulates data... sends data to management center via wireless sensor network and displays data in the field on GLCD screen. The result of this study is a prototype of an air quality measuring device with a size of 192×188×70 mm and using a 9-12 V power source.