中国计量大学学报2026，Vol.37Issue(1)：10-21,12.DOI:10.3969/j.issn.2096-2835.2026.01.002
基于光散射的粒子计数器研究
Research on micrometer scale particle counters based on light scattering
严浩 1刘岳燕2
作者信息
- 1. 中国计量大学 理学院,浙江 杭州 310018
- 2. 中国计量大学 现代科技学院,浙江 杭州 322002
- 折叠
摘要
Abstract
Aims:This paper aims to develop a particle counting system for measuring the number concentration of micron-scale particles and complete its system verification.Methods:Based on the principle of Mie scattering,the scattered light intensity and frequency of laser on the paticles were measured by a photodiode,and then converted into the particle size and quantity by a signal processing system.Combined with a right-angle optical path,a triple stray light suppression design,and a low-noise amplification and filtering circuit,the system noise was reduced synergistically.Results:The test results showed that the system noise standard deviation was reduced from 9.84 mV to 4.73 mV;and the peak noise voltage was reduced by 51.9％,which effectively improved the signal-to-noise ratio(SNR)of the scattered light signal and achieved accurate capture and stable detection of the scattered light signal from micron-scale particles.Conclusions:The developed particle counting system provides an effective technical means for the accurate measurement and performance evaluation of micron-scale particles.关键词
Mie 散射/粒子计数器/信号处理/微米尺度粒子Key words
Mie scattering/particle counter/signal processing/micron-scale particles分类
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严浩,刘岳燕..基于光散射的粒子计数器研究[J].中国计量大学学报,2026,37(1):10-21,12.
