多参数在线空气质量监测系统关键技术研究

Research on Key Technologies of Multi-Parameter Online Air Quality Monitoring System

本文旨在研究一种基于嵌入式系统的多参数在线空气质量监测系统,配合各种化学传感器、温湿度传感器采集空气中各项参数并输出相对应的微弱信号,经高精度放大电路放大后,采用高精度AD转换进入嵌入式芯片STM32,采取温度补偿、滤波算法后计算出空气中各气体的具体含量,通过物联网上传至服务器。本文研发的系统可实现对空气质量的常规、定向在线监测,提升空气监测的实时性及准确度。

This paper aims to study a kind of multi-parameter online air quality monitoring system based on embedded system.With various chemical sensors and temperature and humidity sensors,various parameters in the air are collected and corresponding weak signals are output.After amplification by high-precision amplifier circuit,high-precision AD is used to convert into embedded chip STM32.The specific content of each gas in the air is calculated by the temperature compensation and filtering algorithm and uploaded to the server through the Internet of things.The system developed in this paper can realize routine and directional online monitoring of air quality,and improve the real-time performance and accuracy of air monitoring.