基于Arduino平台的光散射式沙尘颗粒物浓度测量系统设计及应用

发布时间：2018-02-24 13:09

本文关键词： 颗粒物浓度光散射 Mie散射 Arduino LCD显示　出处：《宁夏大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来沙尘暴天气发生的频率虽有所降低,但土地沙化仍呈现不断增加的趋势。同时,由于城市化进程的不断推进,土地荒漠化造成的沙尘和城市污染造成的雾霾等气溶胶现象在很多方面相互影响,甚至形成恶性循环。如何高效、实时、精确地监测沙尘环境中颗粒物浓度,成为目前环境大气领域研究的一项重要课题。鉴于相关仪器的价格、性能等问题,本论文基于夏普生产的GP2Y1010AU0F传感器开发了一款新型沙尘气溶胶浓度测量系统。该仪器制作成本较低、测量精度良好,可用于土壤风蚀、气溶胶浓度测量等研究。首先,本文介绍了现有颗粒物浓度测量技术及其基本原理,并对其进行比较,由此说明基于光散射原理的非接触式颗粒浓度测量技术的诸多优点；然后给出了基于光散射原理进行气溶胶浓度测量的物理原理,推导了球形粒子电磁散射问题的Mie散射基本解,进而得到颗粒系统中群体散射光强度与个体散射光强度之间的关系；最后重点介绍了所设计测量系统的软硬件结构设计,以及对系统的校正、验证和仪器相关实验结果的分析,并将其应用在不同环境中颗粒物的测量,得到较好的结果,对后续系统改善方法及应用领域进行展望。本文的相关研究工作,对于后续在风沙物理学中的风蚀量的测量、沙尘及雾霾等气溶胶颗粒浓度测量的研究具有一定的意义。
[Abstract]:Although the frequency of sandstorm weather has decreased in recent years, the land desertification is still showing an increasing trend. At the same time, due to the continuous progress of urbanization, Aerosol phenomena such as dust caused by land desertification and haze caused by urban pollution affect each other in many ways, and even form a vicious circle. It has become an important subject in the field of environment and atmosphere. In view of the price and performance of related instruments, Based on the GP2Y1010AU0F sensor produced by Sharp, a new dust aerosol concentration measurement system is developed in this paper. The instrument has the advantages of low cost and good measurement precision. It can be used in the study of soil wind erosion and aerosol concentration measurement. In this paper, the existing particle concentration measurement technology and its basic principle are introduced and compared, which shows the advantages of non-contact particle concentration measurement technology based on light scattering principle. Then the physical principle of aerosol concentration measurement based on the principle of light scattering is given, and the basic solution of Mie scattering of spherical particles is derived. Then the relationship between the mass scattered light intensity and the individual scattering light intensity in the particle system is obtained. Finally, the software and hardware structure design of the system is introduced, and the calibration, verification and analysis of the experimental results of the system are also given. It is applied to the measurement of particulate matter in different environments, and good results are obtained, and the improvement methods and application fields of the follow-up system are prospected. The relevant research work in this paper is concerned with the measurement of wind erosion in wind and sand physics. The study of aerosol particle concentration measurement, such as dust and haze, has some significance.
【学位授予单位】：宁夏大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X851

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