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A device and method for detecting edge burst on the front and side of a lens based on a boat-shaped light source

A detection device and front side technology, which is applied in the field of image processing, can solve the problems of incomplete reflection surface of light source, missing detection, failure to accept sufficient light sweeping, etc., to eliminate the effect of acute angle and improve detection accuracy

Active Publication Date: 2021-07-27
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the improvement of the development level of modern manufacturing automation production industry, consumers have more and more stringent requirements on product appearance, size, performance, etc. Efficiency, high-precision automated production requirements, with the increase in labor costs, and the continuous application of machine vision technology in the field of edge detection, more and more manufacturing companies began to use machine vision edge detection technology to replace manual detection to reduce production cost, and at the same time realize the production process of automatic detection, marking, and rejection in the production process of the lens. However, in the existing detection technology, for mirrors of different sizes, especially some lenses with small sizes, they are limited by the light when they rotate. , mechanical claws and other external factors, the lens boundary or part of the lens boundary cannot be fully scanned by the light, there are problems such as missed detection, incomplete reflection surface of the light source, large reflection error, etc.

Method used

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  • A device and method for detecting edge burst on the front and side of a lens based on a boat-shaped light source
  • A device and method for detecting edge burst on the front and side of a lens based on a boat-shaped light source
  • A device and method for detecting edge burst on the front and side of a lens based on a boat-shaped light source

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Experimental program
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Effect test

Embodiment

[0040] Embodiment: Open the camera obscura door outside the detection device, place the lens to be detected on the liner, expose the side of the lens, turn on the boat-shaped light source, the upper and lower light sources start to emit light, two cameras take images of the edge of the lens, and use the image target Sub-pixel positioning technology for edge detection, using automatic multi-segment fitting points to fit the lens boundary of the captured image, accurately locating the edge of the edge, and the gray level change of the normal image sample that does not contain edge defects on the front side of the lens Modeling and analysis of the relative distance relationship with the observation bar, and those beyond the distribution of the model are identified as having edge-burst defects and are eliminated.

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Abstract

The invention relates to a device and method for detecting edge bursts on the front side of a lens based on a boat-shaped light source, and belongs to the technical field of image processing. A device for detecting edge bursting on the front side of a lens based on a boat-shaped light source, characterized in that it includes a dark box, a boat-shaped light source, a fixing frame, a liner and a cylinder, wherein the five sides of the dark box box are closed with plates, and an openable glass door is installed on the front , the lining board is opened and fixed in the middle and lower part of the box body; the boat-shaped light source is composed of a boat-shaped space formed by an arc-shaped panel and two semi-circular panels through two fixing plates, and light sources arranged on both sides of the opening of the boat-shaped space , there are two cameras on the arc-shaped panel at 30° up and down with the horizontal center line as the boundary; a cylinder is installed under the boat-shaped light source, and the cylinder is installed on a fixed frame and drives the boat-shaped light source to move back and forth within the range of the lining plate opening. Shoot the front side of the lens illuminated by a boat-shaped light source. The invention effectively improves the reflection condition of the light source on the lens surface and improves the detection accuracy.

Description

technical field [0001] The invention relates to a device and method for detecting edge bursts on the front side of a lens based on a boat-shaped light source, and belongs to the technical field of image processing. Background technique [0002] With the improvement of the development level of modern manufacturing automation production industry, consumers have more and more stringent requirements on product appearance, size, performance, etc. Efficiency, high-precision automated production requirements, with the increase in labor costs, and the continuous application of machine vision technology in the field of edge detection, more and more manufacturing companies began to use machine vision edge detection technology to replace manual detection to reduce production cost, and at the same time realize the production process of automatic detection, marking, and rejection in the production process of the lens. However, in the existing detection technology, for mirrors of differen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/95G01N21/958G01N21/01G06T7/00G06T7/13
CPCG01N21/01G01N21/95G01N21/958G01N2021/0112G06T7/0004G06T2207/30164G06T7/13
Inventor 张伟伟王鸿超
Owner SHANGHAI UNIV OF ENG SCI