多光路光散射扬尘检测方法研究  

Reach on multi-laser scattering dust detection method

作　　者：李晋惠[1] 于亚琳[1] 田军委[1] 

机构地区：[1]西安工业大学理学院,西安710021

出　　处：《电子测量技术》2015年第10期101-105,共5页Electronic Measurement Technology

摘　　要：针对传统扬尘传感器在测量方法中测量精度低、长期户外测量精度保持性差的不足,在Mie光散射原理基础上,研究了一种多光路扬尘检测方法,设计了一套面向建筑工地扬尘检测的光学扬尘浓度测量系统。介绍了扬尘监测系统的光学测量原理,研究了新方法中光通量和离子浓度计算方法,并对检测系统参数进行了优化分析。设计了多光路激光扬尘检测系统,分析了光透过率与粉尘层厚度之间关系。对所设计系统以国控点数据为基础进行了对比实验,实验结果表明新方法相对国控点数值最大偏差8.5%,较PPD4NS检测精度明显提高。Traditional dust sensor is low precision and its precision keeping is poor in case of out door using,to resolve these problems,a multi-laser dust detection method is studied based on Mie light scattering principle and a dust concentration detection system is designed .The optical measuring principle of dust detection system is introduced, luminous flux and particulate concentration calculation method is studied,and parameters of the measuring system are optimized.Moreover,a multi-laser dust detection system is designed and the relationship between light transmittance and dust thickness is analysis.Experiment is performed compared with national measurement point and PPD4NS dust sensor,the result show that maxim relative deviation of the new system compared with national measurement point is 8.5%,the measuring accuracy is improved greatly compared PPD4NS.

关 键 词：扬尘检测 光散射 激光测量 信号处理 

分 类 号：X85[环境科学与工程—环境工程]