摘要：随着空气污染问题的加剧，对烟尘浓度测量的需求日益增加。为了满足快速测量烟 尘浓度的要求，本文针对基于光散射法的烟尘浓度测量技术开展研究。分析对比了各种 烟尘浓度测量方式的优点和不足，研究了光散射浓度测量法的原理，通过对米氏散射散 射光强的计算公式和 Rosin-Rammler 分布函数的分析，得出了散射光强与质量浓度成一次 线性关系的规律，以此提出了烟尘浓度测量样机的总体方案，设计了样机光路结构、机 械构架、外部壳体和探测电路图，研制出测量装置样机，并在烟道中开展了样机性能测 试实验，实验结果表明样机能够快速测量出烟尘的实时浓度。

关键词 烟尘浓度测量；米氏散射；后向散射光；激光

毕 业 设 计 说 明 书 外 文 摘 要

Title  Study on Technology of Smoke Concentration Measurement Based on Light Scattering Method

Abstract：With the increase in air pollution problems, the demand for soot concentration measurement is increasing. In order to meet the requirement of rapid measurement of soot concentration, this paper studies the smoke concentration measurement technology based on light  scattering method. The advantages and disadvantages of various smoke and dust concentration measurement methods are compared and analyzed. The principle of light  scattering concentration measurement is studied. Based on the calculation formula of scattering of light scattering and the analysis of Rosin-Rammler distribution function, the scattering intensity and the quality of the concentration of a linear relationship between the law, put forward the dust and dust concentration measurement prototype of the overall program, designed the prototype optical path structure, mechanical structure, external shell and detection circuit diagram, developed a prototype device, and carried out in the flue The experimental results show that the prototype can quickly measure the real - time concentration of soot.

Keyword   Dust concentration; Mie scattering; light backscattering; laser

目次

1 绪论 3

1.1 课题研究的背景和意义 3

1.2 国内外研究现状 3

1.3 本论文主要研究内容 7

2 后向散射光强计算 8

2.1 散射类型 8

2.2 Mie 散射以及光强计算 8

2.3 本章小结 12

3 烟尘浓度测量系统设计方案 13

3.1 系统总体方案 13

3.2 光路设计 13

3.3 外部壳体设计 14

3.4 本章小结 15

4 测量电路设计 16

4.1 光电传感器选择 16

4.2 滤波片的选择