Glass bottle defect detection apparatus and image splitting device

Abstract

The invention discloses a glass bottle defect detection apparatus and an image splitting device. The glass bottle defect detection apparatus comprises a plane light source, a polarizer, a diaphragm, the image splitting device, a lens and a camera, wherein the polarizer is arranged in front of the plane light source, the diaphragm is arranged in front of the polarizer, a to-be-detected glass bottle is located between the polarizer and the diaphragm, the image splitting device, the lens and the camera are coaxially arranged in front of the diaphragm and are increasingly far away from the diaphragm, the image splitting device comprises a Fresnel biprism, two obliquely intersecting incident planes of the Fresnel biprism face the diaphragm and are arranged to be corresponding to to-be-detected positions, an intersecting prism ridge of the two incident planes is perpendicular to a horizontal plane, a left or right half part of an emergent plane of the Fresnel biprism is plated with a polarizing film, and the polarization direction of the polarizing film is perpendicular to the polarization direction of the polarizer. According to the invention, the detection apparatus can realize detection of conventional and uneven stress defects of a glass bottle only by using one camera, is capable of measuring boundary dimension of the glass bottle and has the advantages of low detection cost, a small occupation space, high accuracy and a low false drop rate.

Description

technical field [0001] The invention relates to a glass bottle defect detection device and an image splitting device used in the glass bottle defect detection device, belonging to the field of glass bottle defect detection. Background technique [0002] In the field of machine vision inspection, there are many kinds of objects to be inspected, and the optical characteristics of their defects are also very different. Usually, for a certain type of defect inspection, one or more cameras are used to shoot at multiple angles at the same time, so continuous settings are required. Several stations are used to conduct a comprehensive inspection of the object, and in this case, the inspection system will become very large and complex, and the cost is high, which is not conducive to popularization. [0003] Taking the inspection of glass bottles as an example, when the glass is formed, due to the influence of the process, there will inevitably be defects such as stones and sand inclu...

AI Technical Summary

Problems solved by technology

For the stones and sand in the bottle, due to its opaque characteristics, a similar backlight method can also be used to shoot. However, when the stones and sand are located in the scale mark area of ​​the glass bottle, the scale and marks also have absorption and damage to light. Due to the refraction effect, the local image effect is similar to that of stones and sand, which affects the detection of stones and sand defects.

For stress unevenness, most domestic glass bottle manufacturers currently use sensors or offline sampling detection methods. This detection method is highly accidental and cannot guarantee the quality of each glass bottle leaving the factory. The detection speed is low, which is not conducive to the needs of mass production

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