化工进展2024，Vol.43Issue(2)：586-592,7.DOI:10.16085/j.issn.1000-6613.2023-1941
离焦图像法颗粒多参数在线测量技术
Online measurement techniques for multi-parameters of particles based on defocus imaging
摘要
Abstract
The imaging technique for particle online analysis can obtain parameters,including velocity,particle size,number,and concentration of the particle phase in sparse two-phase flow,and their three-dimensional distribution.This technique is non-invasive,simple to operate,and provides intuitive results.However,the limited depth of field in the imaging system can lead to defocus blur,which hinders its application in online particle measurement.In fact,the degree of defocus blur of the particle image contains the depth position information of particles,and the use of defocus blur to measure key particle parameters has attracted increasing attention from researchers.This paper reviews the development history of multi-parameter measurement of particles by defocusing image method.The principle of depth measurement of 3 typical defocus methods(special diaphragm method and astigmatism method based on a single camera,and two-imaging distance method based on two cameras)is briefly described.The advantages and disadvantages of different methods are analyzed.It is pointed out that with the support of advanced image processing algorithms,such as deep learning,defocus imaging method will be more widely used in the field of online particle measurement.关键词
图像法/离焦/速度/粒度/颗粒测量Key words
imaging method/defocus/velocity/size/particle measurement分类
机械制造引用本文复制引用
周骛,龚文超,徐日辛..离焦图像法颗粒多参数在线测量技术[J].化工进展,2024,43(2):586-592,7.基金项目
国家自然科学基金(52376163). （52376163）
