大气与环境光学学报, 2015, 10 (5): 392, 网络出版: 2015-10-22
基于积分浊度法测量气溶胶散射系数的系统设计与实现
Design and Implementation of System of Measuring Aerosol Scattering Coefficient Based on Integral Turbidity Method
摘要
大气气溶胶散射系数不仅是反映大气污染程度的指标,也是研究气候变化的重要参数之一。介绍了一种基于积分 浊度法测量大气气溶胶散射系数的方法及系统设计。分别从系统原理、硬件设计和软件设计等方面介绍系统设 计实现过程;采用恒流驱动方式保证光源稳定发光,高速单光子计数方式对散射光信号进行探测。最后通过 实验验证了系统光源的线性、稳定性和探测器的准确性,并给出了与HW-N1型前向散射式能见度仪测量结果的 对比,得出系统的设计是可行和可靠的结论。
Abstract
Scattering coefficients of atmospheric aerosol is not only an indicator of atmospheric pollution, but also one of the important parameters of climate change. A method of aerosol scattering coefficient measurement based on integral turbidity as well as system design was proposed. The system design principle, hardware and software design and other aspects of the system design and implementation process were introduced respectively. To ensure the stability of the light source, constant current drive mode was used. Light scattering signals was detected by high speed single photon counting technology. Finally, linearity and stability of light source and accuracy of the detector were verified through experiment. Feasibility and reliability of the system were proved by comparing with a forward-scattering visibility sensor HW-N1.
檀奇, 陆亦怀, 陆钒, 桂华侨, 刘建国. 基于积分浊度法测量气溶胶散射系数的系统设计与实现[J]. 大气与环境光学学报, 2015, 10(5): 392. TAN Qi, LU Yihuai, LU Fan, GUI Huaqiao, LIU Jianguo. Design and Implementation of System of Measuring Aerosol Scattering Coefficient Based on Integral Turbidity Method[J]. Journal of Atmospheric and Environmental Optics, 2015, 10(5): 392.