摘要：In this study, the effects of pressure on the optical sensor in an on-line particle measurement system were investigated in detail based on the quantum theory and kinetic theory of gas. The results show that pressure alters the divergent light angle by altering the density and refractive index of the gas, so that the focused beam position is offset from the center of the aerosol tube; this causes the intensity per cross-section area of the optical measurement volume (OMV) to change, creating a significant deviation in the measurement result relative to the actual sample. Theoretical and experimental dynamic models were established based on the geometric optics theory and the geometric mathematical relation to analyze these variations. The results show that OMV size increases as pressure and divergent light angle increase. During an actual particle measurement process, the dynamic models proposed here can be used to effectively adjust and reconstruct the optical sensor, which can substantially improve the precision and accuracy of the measurement results.

关键字：Optical sensor On-line particle measurement Optical measurement volume Dynamic models

ISSN号：0021-8502

卷、期、页：卷: 127 页: 18-26

发表日期：2019-01-01

影响因子：2.042000

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,ESI（基本科学指标数据库）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：Journal of Aerosol Science

通讯作者：卢利锋,宋暄

第一作者：吴小林,姬忠礼

论文类型：期刊论文

论文概要：卢利锋,吴小林,姬忠礼,宋暄，The influence of pressure on optical particle measurement，Journal of Aerosol Science，2019，卷: 127 页: 18-26

论文题目：The influence of pressure on optical particle measurement