基于激光散射和显微放大的颗粒浓度检测装置  

Particle Concentration Detection Device based on Laser Scattering and Microscopic Amplification

作　　者：李娜 文斌[1] 熊荣 LI Na;WEN Bin;XIONG Rong(College of Communication Engineering,Chengdu University of Information Technology,Chengdu 610225,China)

机构地区：[1]成都信息工程大学通信工程学院,四川成都610225

出　　处：《成都信息工程大学学报》2020年第3期289-292,共4页Journal of Chengdu University of Information Technology

基　　金：成都市科技局科技项目(2019-YF05-00919-SN)。

摘　　要：中国近年来工业化建设加快了雾霾的生成,雾霾大大影响着人们的健康、生活和出行.当前最为严重的就是环境污染中的大气颗粒物排放的增加,加剧了雾霾天气的形成.因此颗粒物浓度的高低是评判空气质量好坏的一项重要指标.为获取更精准的空气质量参数,对空气中颗粒浓度进行实时监测是十分必要的.为此,设计了一款基于激光散射和显微放大的颗粒浓度检测装置,该装置以Mie散射作为理论基础,光源是半导体激光器,光照射颗粒产生的散射光在显微设备放大后进一步分析获得微粒的性质信息,同时光电传感器吸收散射光,最后由脉冲信号和光学信号共同反演出颗粒物质量浓度.对实验结果进行对比分析可知:设计的装置精准度和稳定性都能满足要求,能准确测量大气中颗粒物浓度,可实现颗粒物浓度的实时检测.In recent years,China's industrialization has accelerated the formation of haze,which greatly affects people's health,life and travel.At present,the most serious problem is the increase of atmospheric particulate matter emission in environmental pollution,which aggravates the formation of haze weather.Therefore,the concentration of particulate matter is an important index to judge the quality of air.In order to obtain more accurate air quality parameters,it is necessary to monitor the concentration of air particles in real time.To this end,the paper designed a particle concentration detection device based on laser scattering and microscopic magnification,the device is based on the theory of the Mie scattering,whose source is semiconductor laser light source,scattered light produced by the scattered light particles can furtherly analyze the characteristics and information of particles after amplifying by micro devices.At the same time,the photoelectric sensor is absorbing scattered light,and the quality concentration of particle is inverted by the pulse signal and the optical signal finally.A comparative analysis of the experimental results shows that the device designed in this paper can meet the requirements in terms of accuracy and stability,accurately measure the concentration of particles in the atmosphere,and realize real-time detection of the concentration of particles.

关 键 词：颗粒浓度检测 激光散射 显微放大 脉冲信号 

分 类 号：TH741[机械工程—光学工程]