基于一种光散射仪器室内细颗粒物监测结果准确性及影响因素的探究  

Study on the Accuracy of Indoor Fine Particulate Matter Monitoring Results Based on a Light Scattering Instrument and Its Influencing Factors

作　　者：袁扬 柳靖[2] 张正正 李志强 YUAN Yang;LIU Jing;ZHANG Zhengzheng;LI Zhiqiang(China Academy of Building Research,Beijing 100013,China;University of Science and Technology Beijing,Beijing 100083,China;National Center for Quality Supervision and Test of Building Engineering,Beijing 100013,China)

机构地区：[1]中国建筑科学研究院有限公司,北京100013 [2]北京科技大学,北京100083 [3]国家建筑工程质量检验检测中心,北京100013

出　　处：《建筑科学》2023年第6期130-135,共6页Building Science

基　　金：住房和城乡建设部2018年科学技术项目计划(2018-R1-015)。

摘　　要：本文以β射线衰减法所获得的环境空气中细颗粒物PM_(2.5)浓度数据为基准,研究了基于光散射法监测建筑室内PM_(2.5)的结果准确性。通过对比分析,对光散射法的测量误差特征及其影响因素进行了探讨。研究结果显示,当环境PM_(2.5)浓度超过25μg/m3,采用光散射法会产生较大的测量误差,无法满足室内PM_(2.5)的监测需求。同时,光散射法测量结果的准确性主要受环境PM_(2.5)浓度和相对湿度的影响,而与空气温度之间无显著相关性。以此为基础,本文通过多元非线性拟合,给出了光散射法测量结果的修正模型。In this paper,based on the concentration of fine particulate matter(PM_(2.5))in ambient air obtained by the Beta-attenuation Method,the accuracy of the indoor fine particle monitoring results based on the light scattering method was studied.Through comparative analysis,the measurement error characteristics of the light scattering method and its influencing factors were discussed.The results showed that when the ambient PM_(2.5)concentration exceeded 25μg/m^(3),the light scattering method would produce large measurement error,failing to meet the monitoring requirements of indoor PM_(2.5).At the same time,the accuracy of the light scattering method was mainly affected by the ambient PM_(2.5)concentration and relative humidity,but there was no significant correlation with the air temperature.Based on this,a modified model of light scattering measurement results was given through multivariate nonlinear fitting.

关 键 词：光散射法 β射线衰减法 观测站 细颗粒物 校准 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]