气溶胶光学散射特性及其多参数分布式测量研究

项目名称： 气溶胶光学散射特性及其多参数分布式测量研究

项目编号： No.61275012

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 葛宝臻

作者单位： 天津大学

项目金额： 98万元

中文摘要： 对气溶胶进行物理化学特性研究和物理化学参数准确测量在环境监测、空气质量监控、人类健康、生物医学及国防领域具有重要研究价值和意义。本项目以气溶胶为研究对象，深入研究气溶胶的光学散射特性，基于Mie散射理论和Debye级数散射模型，以及Stokes散射矩阵方法进行散射特性分析，研究气溶胶粒度、形状、复折射率等参数与散射光强度、空间分布的理论关系。创新性提出采用干涉或衍射形成的多平行光束作为散射光源照射气溶胶，研究气溶胶在多光束光场中的散射特性，目的是能够多方位同时获取更多的散射信息，实现气溶胶的空气动力学粒径、几何粒径、浓度、复折射率等参数的同时测量，并进一步通过复折射率与气溶胶材料化学组分的关系，估计出气溶胶的种类。在理论研究的基础上，研制能够在线测量多参数的传感器模块，并建立可在相对封闭的公共场所（如飞机机舱、火车车厢、医院候诊大厅、教室等）实时监控的基于光纤传输的分布式测量系统。

中文关键词： 大气气溶胶；光散射；粒径；复折射率；分布式测量

英文摘要： The study on physical and chemical characteristics of aerosol and the research on methods for precise measuring aerosol parameters are of far-researching significance in the fields such as environmental monitoring, air quality supervision, human health, biomedicine and national defense. Taking aerosol as the research object, this project will study its optical scattering properties in-depth, using Mie theory, Debye series scattering model and Stokes scattering matrix method to reveal the relationship between scattering light intensity and spatial distribution and aerosol's size, shape, complex refractive index. The scheme is presented innovatively which generate multi-beam parallel light (MBPL) source applying interference or diffraction method. The research on characteristics of the scattering light emitted by single aerosol particle in the field of MBPL can help detecting more information about scatter light from several directions simultaneously, and finally realize simultaneous measurement of aerosol parameters including aerodynamic size, geometric size, concentration and complex refractive index. By making full use of the relationship between complex refractive index and material compounds of aerosol, the species of aerosol can be discriminated indirectly with complex refractive index knowledge. Under the f

英文关键词： Atmospheric aerosol；Light scattering；particle size；complex refractive index；distributed measurement