LI Na,WEN Bin,XIONG Rong.Particle Concentration Detection Device based on Laser Scattering and Microscopic Amplification[J].Journal of Chengdu University of Information Technology,2020,35(03):289-292.[doi:10.16836/j.cnki.jcuit.2020.03.008]
基于激光散射和显微放大的颗粒浓度检测装置
- Title:
- Particle Concentration Detection Device based on Laser Scattering and Microscopic Amplification
- 文章编号:
- 2096-1618(2020)03-0289-04
- Keywords:
- particle concentration detection; laser light scattering; microscopic magnification; the pulse signal
- 分类号:
- TH741
- 文献标志码:
- A
- 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。
- Abstract:
- 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.
参考文献/References:
[1] Michael B,Cabmen A,Teresa I F,et al.Air pollution and retained particles in the lung[J].Environmental Health Perspectives,2001,109(10):1039-1043.
[2] 潘本锋,汪巍,李亮,等.我国大中型城市秋冬季节雾霾天气污染特征与成因分析[J].环境与可持续发展,2013,38(1):33-36.
[3] 张大年.城市大气可吸入颗粒物的研究[J].上海环境科学,1999(4):154-157.
[4] 张鑫鹏,贺庆,刘佳,等.光度计与颗粒计数相结合的颗粒质量浓度检测方法研究[J].半导体光电,2018,39(3):431-434.
[5] 陈敏燕,黄依璐,樊劼,等.环境PM2.5对慢性阻塞性肺疾病的致病机制研究[J].健康研究,2019(5):537-541.
[6] 冯健儿,韩鹏.基于滤膜称重法的大气颗粒物自动监测仪[J].计算机与现代化,2013(7):94-97.
[7] 陈绍娟.石英压电晶体法测定大气飘尘浓度[J].环境科学与技术,1985(1):19-20.
[8] 李丽芳.大气气溶胶粒子散射对激光大气传输影响的研究[D].太原:中北大学,2013.
[9] 周鑫.光散射法PM2.5传感器的性能比对及优化[J].环境与健康杂志,2016,33(8):739-743.
[10] 林宏.海洋悬浮粒子的米氏散射特性及布里渊散射特性研究[D].武汉:华中科技大学,2007:23-24.
[11] 谢家亮.激光散射信号与大气颗粒测量技术研究[D].杭州:杭州电子科技大学,2016.
[12] 项建胜,何俊华.Mie光散射理论的数值计算方法[J].应用光学,2007(3):363-366.
[13] 沈飘海.基于FPGA的线阵CCD图像采集与处理系统设计[D].武汉:湖北工业大学,2017.
[14] 蒋云志,周汉义,占小奇.一种单片机双极模拟信号A/D转换的电路设计[J].电子科技,2014,27(4):121-123.
[15] 左春英,张欣艳,陈佰树,等.He-Ne激光辐照种子光强的研究与设计[J].新农业,2017(7):4-6.
备注/Memo
收稿日期:2019-07-03