| 大气悬浮颗粒物粒谱分析研究 |
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| 引用本文： | 连悦,刘文清,张天舒,刘建国.大气悬浮颗粒物粒谱分析研究[J].地球物理学报,2006,49(1):78-82. |
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| 作者姓名： | 连悦 刘文清 张天舒 刘建国 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所环境光学中心，合肥 230031 |
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| 基金项目： | 国家高技术研究发展863计划（2002AA641020）资助. |
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| 摘 要： | 本文对大气悬浮颗粒物的测量是利用半导体激光器，通过镜片组形成双光斑，当颗粒物经过双光斑时发生散射，由雪崩二极管检测散射光形成双峰信号，双峰间距即为待测粒子通过双光斑时的飞行时间，利用飞行时间可得到相应的粒径大小. 大量的实验表明空气中的粒谱呈正态高斯分布，这点与理论分析结果相一致.
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| 关 键 词： | 飞行时间 粒径 雪崩二极管 气溶胶 粒谱分布 |
| 文章编号： | 0001-5733（2006）01-0078-05 |
| 收稿时间： | 2004-11-02 |
| 修稿时间： | 2004-11-022005-10-21 |
Spectral analysis of suspended granule particles in the atmosphere |
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| LIAN Yue,LIU Wen-Qing,ZHANG Tian-Shu,LIU Jian-Guo.Spectral analysis of suspended granule particles in the atmosphere[J].Chinese Journal of Geophysics,2006,49(1):78-82. |
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| Authors: | LIAN Yue LIU Wen-Qing ZHANG Tian-Shu LIU Jian-Guo |
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| Institution: | Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China |
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| Abstract: | The article presents a method to measure atmospheric suspended particles with a double facula which consists of a group of lens and a diode laser. Laser was scattered when particles go through the double facula. APD(avalanche photoelectricity diode) detects the scattered light and outputs a double-peak signal. Particle size, sum of particles and lognormal size spectrum can be determined by time of flight. Experimental results show that the particle spectrum in the air is of normal Gaussian distribution, in agreement with the theoretical analysis. |
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| Keywords: | Time of flight Particle size Avalanche diode Aerosol Particle size distributing |
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