Method and device for detecting micron-level defects of small-caliber inner wall and application

Abstract

The invention belongs to a surface defect detection technology of a cylindrical inner wall to be detected, and discloses a small-caliber inner wall micron-level defect detection method, a detection device and application of the small-caliber inner wall micron-level defect detection method. A visual environment is built according to the size of an inner wall to be detected, a stripe light source is placed at the bottom of the inner wall to be detected, a CCD camera obtains an inner wall image of the stripe light source in the inner wall from the other end, and when the inner wall has defects, defect images at the corresponding positions deflect; by designing a stripe shape, a mechanical structure and a CCD (Charge Coupled Device) camera image processing method, online detection of micron-sized defects of the inner wall of the small caliber is realized on a deflected defect image based on a ray tracing method. According to the invention, high-efficiency detection can be carried out, the problem of slow rhythm of existing equipment is solved, and the detection efficiency is improved by dozens of times on the original basis. According to the invention, high-precision on-line detection of small-diameter inner wall defects by enterprises is realized, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the surface defect detection technology of the cylindrical inner wall to be tested, specifically belongs to the technical field of micron-level defect detection technology of the small-diameter inner wall surface, and in particular relates to a machine vision-based micron-level defect detection device and method of the small-diameter inner wall. Background technique [0002] At present, the global industrialization level, high-end manufacturing and other fields have developed rapidly. The mechanical structure and functions of various industrial equipment are developing towards diversification and complexity. More and more cylindrical workpieces are used in machinery, automobiles, aerospace, It is processed and used in modern high-end manufacturing fields such as the military. Common applications include automobile engine cylinders and bushings, eddy current transformers, hydraulic torque converters, and drums of aero engines. Sl...

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Problems solved by technology

It specifically relates to a method for detecting micron-level defects on the inner wall of a small aperture

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