蒙特卡罗模拟大气颗粒物粒子偏振特性研究

发布时间：2018-03-09 16:26

本文选题：大气颗粒物　切入点：光散射　出处：《激光杂志》2017年07期 　论文类型：期刊论文

【摘要】：针对传统雾霾监测方法周期长,成本高的缺点,基于蒙特卡罗算法模拟了大气颗粒物粒子的偏振特性,进而来探索雾霾监测新方法。通过蒙特卡罗算法对大气颗粒物光散射过程进行模拟研究,首先采用Stokes参量和穆勒矩阵来构建光子传输与大气颗粒物介质偏振特性的模型,然后模拟研究入射光偏振态、波长以及粒子中值半径对偏振光在浑浊大气传输过程中的影响,最后统计不同角度的出射光子偏振信息。实验结果表明空气动力学直径在0.01μm-2.5μm(PM2.5)的大气可吸入颗粒物经过偏振光散射后出射光表现出明显偏振特性,且线偏振度随散射角出现驼峰型变化。基于这一模拟结果为后续利用偏振特性来监测雾霾污染提供了新的思路。
[Abstract]:Aiming at the disadvantages of the traditional haze monitoring method with long period and high cost, the polarization characteristics of atmospheric particulate particles are simulated based on Monte Carlo algorithm. The Monte Carlo method is used to simulate the light scattering process of atmospheric particles. Firstly, the model of photon transport and polarization characteristics of atmospheric particulate media is constructed by using Stokes parameters and Muller matrix. Then, the effects of polarization state, wavelength and median radius of particles on the propagation of polarized light in turbid atmosphere are simulated. Finally, the polarization information of emitted photons at different angles is analyzed. The experimental results show that the polarized light of atmospheric particulates with aerodynamic diameter of 0.01 渭 m ~ 2.5 渭 m PM2.5) exhibits obvious polarization characteristics after polarized light scattering. The degree of linear polarization varies with the scattering angle. The simulation results provide a new way to monitor haze pollution using polarization characteristics.
【作者单位】：桂林电子科技大学;
【基金】：广西教育厅重点项目(ZD2014053) 广西自动检测技术与仪器重点实验室基金(YQ15111,YQ16105) 桂林电子科技大学创新团队项目
【分类号】：O436.3

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