Method for reducing three-dimensional structure of non-woven material through fiber central axis

Abstract

The invention relates to a method for reducing a three-dimensional structure of a non-woven material through a fiber central axis. The method comprises the following steps: extracting a central axis of a fiber through a same-field multi-layer multi-focal-plane non-woven material microscopic image so as to restore the three-dimensional form and position of the central axis in the non-woven material; collecting and fusing multilayer microscopic images; performing the circular segmentation of the fibers, selection of circle center points, calculation of the depth of the circle center points, extraction of the central axes of the fibers and reduction of the closed three-dimensional surfaces of the fibers; extracting the depth of a source point on the central axis of the fiber and the section radius of the fiber at the source point, and then restoring the three-dimensional coordinates of the fiber axis and the closed surface in a spatial interpolation mode. Compared with other reconstruction methods, the method provided by the invention truly restores the relationship between fiber longitudinal directions, and provides a high-quality three-dimensional model for subsequent research on key parameters such as pore size and distribution, pore inner surface area, pore volume, air fluid resistance and pressure difference of the non-woven material.

Description

Technical field[0001]The present invention relates to a three-dimensional reconstruction technique of nonwoven materials, and more particularly to a method of reducing a three-dimensional structure of a nonwoven material through a fiber.Background technique[0002]2019 new coronavirus (2019-NCOV) has greatly increased people's demand for air filtering protection products, most air filtration products such as masks, dust masks, air filters, etc. The meltblown nonwoven material is used. Good nonwoven material requirements can efficiently capture different sizes, viruses in the air under lower filter resistance conditions. There is a rich multi-directional fine curved hole and a high void ratio inside the nonwoven material, so there is very good filtration performance. However, it is because the nonwoven air filter material pore structure is very complicated. It is now only possible to rely on testing its equivalent aperture to approximate, for its true internal structure, no matter whet...

AI Technical Summary

Problems solved by technology

But the main problem is that within the depth of field of the optical lens, the surface of the fiber will be imaged repeatedly in multiple layers, which makes it difficult to calculate the unique depth of the surface point, and the lower layer is blocked, so the reconstructed 3D model is only the focal point of each layer Each fiber is cut off and incoherent, and the connection between layers is lost, as well as the true shape of the fiber in space.

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