基于光学散射原理的气溶胶光度计开发  

Development of aerosol photometer based on optical scattering principle

作　　者：张白[1] 王鹤 高正 孔德超[1] 魏栋梁 Zhang Bai;Wang He;Gao Zheng;Kong Dechao;Wei Dongliang(School of Electrical and Information Engineering,North Minzu University,Yinchuan 750000,China;Wujiang Huayu Cleaning Equipment Co.,Ltd.,Suzhou 215000,China)

机构地区：[1]北方民族大学电气信息工程学院,银川750000 [2]吴江市华宇净化设备有限公司,苏州215000

出　　处：《电子测量技术》2022年第7期110-116,共7页Electronic Measurement Technology

基　　金：国家自然科学基金(52065002)项目资助。

摘　　要：为应对高效准确的气溶胶质量浓度测量问题,本文使用光散射法测量气溶胶质量浓度原理开发了一套气溶胶光度计。设计了恒流量控制模块,利用待测气溶胶在激光照射下产生的前向散射光与质量浓度成正比原理,使用光电倍增管将光信号转换成电信号,根据相同测量条件下高精度对比仪器结果进行线性系数计算。经实验证明,本文开发气溶胶光度计系统示值误差在能在±5%以内,重复性偏差在3%以内,符合气溶胶光度计校准规范的要求,实现了气溶胶质量浓度测量,具有较好的应用价值。In order to solve the problem of efficient and accurate measurement of aerosol mass concentration,an aerosol photometer is developed based on the principle of measuring aerosol mass concentration by light scattering method.The constant flow control module is designed.Based on the principle that the forward scattered light of aerosol by laser irradiation is proportional to the mass concentration,the optical signal is converted to electrical signal by photomultiplier tube,and the linear coefficient is calculated according to the high-precision comparison instrument results under the same measurement conditions.The experimental results show that the indication error of the aerosol photometer system developed in this paper can be within±5%,and the repeatability deviation is within 3%,which meets the requirements of aerosol photometer calibration specification,realizes the measurement of aerosol mass concentration,and has good application value.

关 键 词：光散射 光电转换 质量浓度 流量控制 嵌入式数据库 

分 类 号：TH744[机械工程—光学工程] TP273[机械工程—仪器科学与技术]