传感技术学报2016，Vol.29Issue(4)：536-544,9.DOI:10.3969/j.issn.1004-1699.2016.04.013
高精度光散射气溶胶质量浓度测量系统的信号处理研究
Research on Signal Processing of High-Precision Light-Scattering Measurement Systems for Aerosol Mass Concentrations
摘要
Abstract
Aerosol mass concentration is a critical parameter for evaluating the changes in the atmospheric environ⁃ment,and the light scattering method is an effective method to measure this parameter on-line. However,the inte⁃grated optical signal is commonly utilized to inverse aerosol mass concentration in the currently existing inversion models,which makes the optical information of aerosols loss. Meanwhile,the factor of particle shape has not been considered. To solve these problems,this paper proposes a fractal model for aerosol mass concentration by using the pulse signal amplitude distribution of scattering light from aerosols. This model takes full advantage of the informa⁃tion of the signal amplitude and the corresponding number of signals,which can effectively improve the inversion ac⁃curacy. The experimental results indicate that the mass concentrations based on the fractal model are in agreement with the actual measured values for the dust and air samples. The absolute errors between the slope of the fitted line and 1 are 0.034 and 0.016,the correlation coefficients are above 0.999,and the average relative errors are less than 7.7%. But the average relative errors of mass concentrations inversed through the integrated optical signal are less than 18.7%. The study provides a new accurate method for the online monitoring of the aerosol mass concentration based on the light scattering.关键词
光散射/气溶胶质量浓度/信号幅度分布/分形/积分信号Key words
light scattering/aerosol mass concentration/signal amplitude distribution/fractal/integrated signal分类
信息技术与安全科学引用本文复制引用
张加宏,韦圆圆,顾芳,冒晓莉,沈雷,包志伟,汪程,吴佳伟..高精度光散射气溶胶质量浓度测量系统的信号处理研究[J].传感技术学报,2016,29(4):536-544,9.基金项目
国家自然科学基金项目（61307113，61306138）；江苏省自然科学基金项目（BK2012460）；江苏省高等学校大学生实践创新训练计划项目（201510300034）；江苏省信息与通信工程优势学科建设项目 （）
