Elliptical shape and size approximation of a particle contour

Mining of Sustainable Development

生态环境科学

Heyduk, A.^1

Silesian University of Technology, Faculty of Mining and Geology, 2 Akademicka Street, Gliwice

44-100, Poland^1

关键词: Approximation methods;    Elliptical shapes;    Machine vision systems;    Moments of inertia;    Particle behavior;    Particle size distribution analysis;    Screening process;    Two-dimension;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/261/1/012013/pdf
DOI  :  10.1088/1755-1315/261/1/012013

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The paper presents an approximation of the particle contour by means of an ellipse with equivalent moments of inertia along both axes perpendicular to each other. This method ensures higher accuracy of size approximation than circular and rectangular approximation methods. The proposed method can be applied to machine vision systems used for particle size distribution analysis. In this method, there are simultaneously determined two (instead of one) characteristic dimensions. From these two dimensions as a decisive criterion there is chosen the smaller one, because it has the greatest importance for the particle behavior of the grain in the screening process.