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开放光程扬尘颗粒物浓度测量方法及系统
引用本文:肖云龙,徐可欣,陈文亮,李杏华,李晨曦,路广. 开放光程扬尘颗粒物浓度测量方法及系统[J]. 光学技术, 2016, 0(4): 312-316
作者姓名:肖云龙  徐可欣  陈文亮  李杏华  李晨曦  路广
作者单位:天津大学 精密测试技术及仪器国家重点实验室,天津,300072
基金项目:美丽天津重大工程项目(14ZCDGSF00028);天津科技计划项目(132C2DSF14500;132C2DSF00200)
摘    要:利用单波长激光通过扬尘空间发生散射消光衰减的特性,设计了开放光程的颗粒物浓度检测方法及系统。该方法利用双峰正态分布模型模拟颗粒物粒径分布,实时计算一定空间范围内的扬尘颗粒物浓度,具有响应速度快、测量动态范围宽的优点,适合浓度高、变化快、空间范围大的扬尘颗粒物浓度测量。通过水溶胶模拟实验与烟尘实验验证了该方法的可行性。实验数据表明,系统量程可达0~400mg/m3,分辨率为0.05mg/m3,响应时间小于1s。

关 键 词:消光法  Mie散射  开放光程  扬尘浓度  在线测量

Fugitive dust concentration measurement method and system based on an opening light-path
XIAO Yunlong;XU Kexin;CHEN Wenliang;LI Xinghua;LI Chenxi;LU Guang. Fugitive dust concentration measurement method and system based on an opening light-path[J]. Optical Technique, 2016, 0(4): 312-316
Authors:XIAO Yunlong  XU Kexin  CHEN Wenliang  LI Xinghua  LI Chenxi  LU Guang
Affiliation:XIAO Yunlong;XU Kexin;CHEN Wenliang;LI Xinghua;LI Chenxi;LU Guang;State Key Laboratory of Precision Measuring Technology and Instruments,Tianjin University;
Abstract:The fugitive dust concentration measurement method and the system are presented based on light scatter-ing when a single wavelength laser goes through fugitive dust.The system approximates the real particle size distribution by a bimodal normal distribution model and calculates fugitive dust concentration in an opening light-path real-timely. There are a wide dynamic range and a real-time response speed,so it’s appropriate for the measurement of fugitive dust with a high concentration,a fast change and a wide range.The feasibility and reliability is proved by hydrosol experi-ments and smoke dust tests.Experimental results show that the system can cover a concentration measurement range of 0~400mg/m3 with a resolution of 0.05mg/m3 ,and finish a measurement in less than 1s.
Keywords:light extinction  Mie scattering  open path  fugitive dust concentration  online measurement
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