基于前向散射原理的差分式粉尘浓度测量装置
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摘要
针对传统光散射法测量粉尘浓度易出现背景噪声、器件噪声等问题,设计了一种基于光散射原理的双光路粉尘浓度测量装置,该装置以MSP430单片机为控制核心,采用高精度光电二极管精确测量包含粉尘浓度的光散射信号,经过微控制器结合小波去噪方法,对信号进行处理、转换、显示和存储,通过搭建的无线传感网络上传至主机,显示当前环境的实时粉尘浓度。同时为了减小光的反射造成误差,利用吸光材料设计暗室减小背景光的干扰。研究表明该系统能够进行粉尘浓度的实时检测,有一定的应用价值。
In order to solve the problems of background noise and device noise in traditional light scattering method,a double light path dust concentration measuring device based on light scattering principle is designed. The device uses MSP430 single chip microcomputer as the control core,and uses high-precision photodiode to accurately measure the light scattering signal containing dust concentration. The signal is processed,converted,displayed and stored by microcontroller combined with wavelet denoising method. The real-time dust concentration in the current environment is displayed through the wireless sensor network. At the same time,in order to reduce the error caused by the reflection of light,the dark room is designed by using the light absorbing material to reduce the interference of the background light. The research shows that the system can detect the dust concentration in real time and has certain application value.
In order to solve the problems of background noise and device noise in traditional light scattering method,a double light path dust concentration measuring device based on light scattering principle is designed. The device uses MSP430 single chip microcomputer as the control core,and uses high-precision photodiode to accurately measure the light scattering signal containing dust concentration. The signal is processed,converted,displayed and stored by microcontroller combined with wavelet denoising method. The real-time dust concentration in the current environment is displayed through the wireless sensor network. At the same time,in order to reduce the error caused by the reflection of light,the dark room is designed by using the light absorbing material to reduce the interference of the background light. The research shows that the system can detect the dust concentration in real time and has certain application value.
引文
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[15]马玉洁.大气颗粒物散射光信号采集系统的设计[D].哈尔滨工业大学,2015.
[2]郑宸,于永进,孙金红,等.一种基于红外差分法的粉尘浓度测量装置[J].工矿自动化,2015,41(07):58-61.
[3]邹丽新,季晶晶,朱桂荣,等.空气悬浮颗粒物粒径分布及质量浓度一体化测量系统的研制[J].传感技术学报,2007,20(8):1788-1792.
[4]梁艳,张增福,陈文亮,等.基于β射线法的新型PM2.5自动检测系统研究[J].传感技术学报,2014,27(10):1418-1422.
[5]WINKEL A,RUBIO J L,VELD JWHHI,et al.Equivalence testing of filter-based,beta-attenuation,TEOM,and lightscattering devices for measurement of PM 10 concentration in animal houses[J].Journal of Aerosol Science,2015,80:11-26.
[6]王杰,郑林江.煤矿粉尘职业危害监测技术及其发展趋势[J].煤炭科学技术,2017,45(11):119-125.
[7]张棚,刘路路,李传亮,等.基于Mie散射的可吸入颗粒检测仪的设计[J].光谱学与光谱分析,2014,34(08):2298-2302.
[8]徐婷婷,邹丽新,顾济华,等.基于PID控制粉尘浓度测量仪的实现[J].现代电子技术,2011,34(14):176-178+182.
[9]曾思明,杨冠玲.基于Lab VIEW的粉尘排放远程监控系统研究[J].现代电子技术,2009,32(05):139-141.
[10]吴伟,秦石乔,黄竹青.水滴粒径散射测量中的快速反演方法研究[J].光学学报,2011,31(07):156-160.
[11]张鑫鹏,贺庆,刘佳,等.光度计与颗粒计数相结合的颗粒质量浓度检测方法研究[J].半导体光电,2018,39(03):431-434+439.
[12]梁振江,刘海霞,牛燕雄,等.THz谐振腔型石墨烯光电探测器的设计[J].物理学报,2016,65(16):241-248.
[13]GEBHART J.Optical direct-reading techniques:Light intensity systems,in aerosol measurement:Principles,techniques,and applications[M].New York:Wiley-Interscience,2001:419-454.
[14]程浩,袁月,王恩德,等.基于小波变换的自适应阈值微震信号去噪研究[J].东北大学学报(自然科学版),2018,39(09):1332-1336.
[15]马玉洁.大气颗粒物散射光信号采集系统的设计[D].哈尔滨工业大学,2015.