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Method for detecting defects in glassware articles, and installation for implementing said method

一种玻璃器皿、检测方法的技术，应用在用于检测玻璃器皿物品缺陷,以及用于实施所述的装置领域，能够解决不能检测图案暗区等问题

Active Publication Date: 2015-07-22
IRIS INSPECTION MACHINES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this comparison cannot detect defects present in the dark regions of the pattern

Method used

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  • Method for detecting defects in glassware articles, and installation for implementing said method
  • Method for detecting defects in glassware articles, and installation for implementing said method
  • Method for detecting defects in glassware articles, and installation for implementing said method

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Embodiment Construction

[0035] As previously stated, the present invention relates to a method and a device for detecting so-called transparency defects 1 in articles of glassware. An example of such a device is figure 1 As shown, the illustrated conveyor belt 2 , on which different product items 3 to be analyzed are placed, passes in front of the defect detection station 5 . In the illustration, the device comprises an analysis table 5 mainly formed by a light source 6 arranged on one side of the conveyor belt 2 and an image capture assembly 10 arranged on the other side. Of course, the invention also encompasses variations in which the analysis station includes multiple light source / image capture assemblies capable of analyzing the same article of manufacture according to multiple angles of incidence. Variations of the invention also include wherein the line of sight of the camera forms a non-zero angle with the direction perpendicular to the light source. The range of different angles within whi...

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Abstract

A method for detecting low-contrast pressing or blowing defects in glassware articles includes the steps of backlighting the article by way of one or several light sources according to at least one pair of similar patterns shifted in space; capturing at least one pair of images of the backlit article according to each of the patterns of the at least one pair of patterns; combining the images of each of the pairs to form at least one composite image; and detecting the areas of stronger contrast within the composite images.

Description

technical field [0001] The present invention relates to apparatus for controlling the quality of manufacture of glassware items such as bottles, flasks and other containers. More specifically, the aim is to obtain a dedicated inspection method for detecting certain types of defects called "transparent", as opposed to so-called "opaque" defects, which are easily detected. [0002] The term "transparent" defects particularly, but not exclusively, denotes defects formed by air bubbles on the surface of an item, so small in thickness that their backlighting generates areas of low contrast and are therefore difficult to detect. For industries such as perfumery, where the regularity of appearance is very important, these defects in the articles used are of great importance. The pharmaceutical industry is also very sensitive to such defects as they lead to the formation of glass splinters which are very dangerous inside the flasks. [0003] Other "transparent" defects, such as inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/90
CPCH04N9/04H04N7/18G01N21/90H04N23/10
Inventor 马杰达·拉赫玛尼克里斯托弗·德罗利菲利普·尤拉
Owner IRIS INSPECTION MACHINES
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