Inner diameter spiral scanning defect detection device

Abstract

The invention discloses an inner diameter spiral scanning defect detection device, and the device comprises a camera capable of linearly moving and a clamping mechanism capable of rotating around a circle; a low-angle strip-shaped light source is used for supplementing a light source to the inner wall of a detected metal cylinder, low-angle light supplementing is used, so the camera is in a bright field, the defect is clearer, a light source irradiates on the inner wall of the metal cylinder to be detected and is received by the reflecting prism, light received by the reflecting prism is reflected to the telecentric lens, the telecentric lens realizes a low-distortion image, defect reduction is realized more accurately, the telecentric lens restores the image to the camera, so as to detect the inner diameter defects of a detected metal cylinder; the first driving unit is combined with the second driving unit to achieve spiral scanning of the detected metal cylinder; in the device, spiral rapid detection is achieved in a two-axis linkage mode, scanned irregular images are spliced through rear-end image processing, the rigidity change of the images is performed, and a cylindrical surface complete graph is extracted.

Description

technical field [0001] The invention relates to the technical field of engine cylinder inner diameter defect detection, in particular to an inner diameter helical scanning defect detection device. Background technique [0002] Cylinder The degree of wear of the cylinder is an important basis for judging whether the engine is in good technical condition and whether it needs overhaul. Under normal circumstances, the wear of the cylinder is uneven wear in the moving area of ​​the piston ring, and there is a certain regularity. When the piston is near the top dead center, the back pressure of each ring is the largest, the first ring is the largest, and the subsequent rings decrease gradually. In addition, the upper part of the cylinder has high temperature, poor lubrication, dust in the intake air, corrosion caused by acidic substances in the exhaust gas, etc., which will cause the upper part of the cylinder to wear a lot and the lower part to wear less. The largest wear area i...

AI Technical Summary

Problems solved by technology

[0004] The artificial detection of the existing technology is easy to introduce human error; in order to improve production efficiency, reduce errors, and detect small defects and damages that cannot be recognized by human eyes, an automatic and efficient detection is proposed to solve the above problems

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