EI Wensheng，WEI Yongjie，CHE Jinchao

(School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130，China)

Abstract: It is difficult to eliminate noise in the algorithm to invert particle size distribution in laser particle size measurement，so the scattering light energy matrix of the particle was analyzed. The variable-scale algorithm was executed on the problem. As the scattered light energy distribution varied much for a large and a small particle, and the white noise effect was different on each element, a gradient adjustment vector was adapted to adjust iteration directions respectively. It was a connector for the successive gradients. As a result, the gradients are adjusted accurately. Experiments were carried out on two particulate reference materials and their mixture. The results show that the errors to the reference value are not more than 10.09%. Furthermore, the mixed samples with multi-peak distribution can be identified.

Keywords: laser particle size measurement; particle size distribution; variable-scale algorithm

中图分类号：TB44; TN247                          文献标志码：A

文章编号：1008-5548(2020)04-0028-05

DOI:10.13732/j.issn.1008-5548.2020.04.005

收稿日期： 2019-12-17，修回日期：2020-03-09，在线出版时间：2020-05-07 14:28。

基金项目：天津市自然科学基金项目，编号：18JCTPJC56600；河北省科技厅、河北工业大学科技创新战略资助项目，编号：13。

第一作者简介：魏文晟(1996—)，男，硕士研究生，研究方向为颗粒测试。E-mail：2550496093@qq.com。

通信作者简介：魏永杰(1971—)，男，博士，教授，研究方向为光电检测和光谱分析。E-mail：yj.wei@163.com。