单粒子光散射脉冲信号幅度分布的分形特征  

The Fractal Characteristic of Single Particle's Scattering Signal Amplitude Distribution

作　　者：彭刚[1] 张强[1] 何亚洲 张银鹏[1] 

机构地区：[1]江苏省计量科学研究院,南京210046

出　　处：《测试技术学报》2015年第4期294-298,共5页Journal of Test and Measurement Technology

摘　　要：借助于激光尘埃粒子计数光电传感器,对单粒子产生的随机散射光脉冲信号的幅度分布特征进行统计测量,发现不同粒径标准粒子、空气中的尘埃粒子以及光电传感器随机噪声等对应的脉冲信号数随幅度的分布具有对数正态分布形式.随机脉冲信号数随幅度分布规律是随机过程统计特性的表现,并可证明,对数正态分布函数具有广义分形的基本特征.The amplitude distribution characteristic of single particle＇s random scattering light pulse is measured by laser particle counter.The experimental results indicate that different particle size corresponding to the standard particle in air and dust particles and photoelectric sensor random noise pulse signal with amplitude distribution with a logarithmic normal distribution.In a word,the rule of the random light pulse＇s amplitude distribution is the expression of the random process＇ s statistic character.In particular,it can be proved that the logarithmic normal distribution function has a generalized fractal characteristic.

关 键 词：散射光脉冲信号测量 随机脉冲信号 对数正态分布 分形特征 

分 类 号：TH741[机械工程—光学工程]