Industrial product micro hole wall defect imaging device and identification algorithm

Abstract

The invention discloses an industrial product micro hole wall defect imaging device and an identification algorithm, The device comprises an external high-power light supplement lamp, a semi-transparent and semi-reflective lens, an imaging zooming device, a photoelectric conversion sensor and a parallel light beam convex lens, wherein the external high-power light supplement lamp is internally provided with a liquid lens for detecting a suspicious hole, the parallel light beam convex lens is used in cooperation with a point light source, and the liquid lens comprises a liquid lens oil cavity, a piezoelectric ceramic and a liquid lens water cavity.According to the scheme, a liquid lens is adopted, so that precise detection and specific detection of each suspicious hole and large-view rough detection of a plurality of holes are integrated, and the function of clearly checking the inner wall of a micro hole which can be realized by multiple groups of lenses can be realized; an external light supplement lamp is adopted for large-view rough detection to precisely detect each hole wall, and coaxial light supplement is adopted, so that different visual field detection light intensities are ensured, different apertures can be achieved only by changing the voltage of the liquid lens without changing the lens, and the use is simple and convenient.

Description

technical field [0001] The invention relates to the technical field of engineering construction quality inspection, in particular to an imaging device and an identification algorithm for micro-hole wall defects of industrial products. Background technique [0002] Micropores are more and more widely used in the fields of aerospace, automobile, energy and chemical industry. During the precision casting process of automobile engine cylinder head, aerospace vehicle heat pipe and other devices, some tiny cracks often appear on the surface of the inner wall of the micropores. , air holes, pits and other defects, these defects may cause leakage of high-pressure gas or liquid inside the components, especially at the joints, resulting in a reduction in equipment performance and even safety accidents; [0003] The current commonly used industrial hole wall defect detection technology has the following shortcomings: [0004] 1. It is difficult to see the inner wall of the micro hole ...

AI Technical Summary

Problems solved by technology

[0004] 1. It is difficult to see the inner wall of the micro hole clearly;

[0005] 2. Objects are mainly detected by tilting, first to check some inner wall defects, and then to check other inner walls, which requires multiple inspections and basically cannot be automated;

[0006] 3. The existing lens for viewing the inner wall is large in size, which is mainly realized through the combination of complex lens groups, which is prone to image distortion;

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