Simultaneous shape and size measurements of irregular rough particles by an IPI system with double receivers

摘要

This paper proposes a method of obtaining the shape and the size of irregular rough particles, which are abundant in particle fields. The approach uses the infocused image of the particle to determine its size, and an improved relation between the central peak of the 2D-autocorrelation of its defocused image and its size to obtain the shape. An interferometric particle imaging system with double receivers is established to simultaneously collect the infocused image and defocused image. Experiments confirm the effectiveness of the proposed algorithm with a measurement relative error on the sample particles not exceeding 10.4%. In general, this method can offer significant perspectives on the characterization of particle fields.