Three-dimensional reconstruction method of hollow plate ceramic membrane defects through fusion of ultrasound and machine vision technology

Abstract

The present invention provides a three-dimensional reconstruction method of hollow plate ceramic membrane defects through the fusion of ultrasound and machine vision technologies. Three-dimensional reconstruction data of defects in a hollow plate ceramic membrane and three-dimensional reconstruction data of the surface defects of the hollow plate ceramic membrane are fused to achieve three-dimensional reconstruction of the whole defects of the hollow plate ceramic membrane, the former is collected by an ultrasound detection technology, and the latter is collected by the machine vision technology. An evidence theory is employed to calculate the weights of the three-dimensional reconstruction data of defects in the hollow plate ceramic membrane and the three-dimensional reconstruction data of the surface defects of the hollow plate ceramic membrane and set closed values for the obtained weights so as to determine a final defect boundary and obtain the three-dimensional data of the wholedefects of the hollow plate ceramic membrane; the three-dimensional of the redistributed whole defects is subjected to constraint-based nonrigid aligning so as to achieve three-dimensional reconstruction. The method can effectively solve the problems that defect complexities are different and the materials are wasted.

Description

technical field [0001] The invention relates to a three-dimensional reconstruction method for hollow plate ceramic membrane defects which combines ultrasonic and machine vision technologies, and belongs to the technical fields of mechanical engineering and computer engineering. Background technique [0002] Facing the increasingly severe water shortage situation, asking for water from the sea, which accounts for 96.5% of the earth's total water resources, is the only way to solve the water shortage problem. Among the many seawater desalination methods, reverse osmosis seawater desalination ( ) technology has the characteristics of less land occupation, short construction period, simple operation, small specific investment, no phase change, low energy consumption and fast start-up operation, etc., and has developed rapidly in the field of seawater desalination. Currently The pretreatment process can be divided into traditional method and membrane method, and the membrane ...

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Problems solved by technology

However, these studies are still at the stage of theoretical exploration, and whether they are applicable to the fusion of 3D data of internal defects and surface defects of hollow plate ceramic membranes remains to be verified.

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