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Illumination method and device for determining the presence of defects on the surface of a container collar

A technique for illuminating devices and containers, applied in the direction of measuring devices, optical testing flaws/defects, instruments, etc., which can solve problems such as difficult and reliable detection

Active Publication Date: 2007-12-05
TIAMA SOCIETE ANONYME
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, it has been pointed out that it is difficult to reliably detect defects when processing images, in particular because of parasitic oscillations (parasites) in the images caused by different light reflections on the container surface

Method used

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  • Illumination method and device for determining the presence of defects on the surface of a container collar
  • Illumination method and device for determining the presence of defects on the surface of a container collar

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Embodiment Construction

[0035] Figure 1 shows an illumination device 1 according to the invention for an inspection station 2 for detecting possible surface defects on the surface s of the collar 3 of a transparent or translucent container 4 having a symmetrical axis or axis of rotation X.

[0036] In general, the inspection station 2 comprises a matrix camera 6 arranged to cover the light beam reflected by the surface s of the collar 3 of the container 4 . Said camera 6 equipped with an objective lens is connected to an analysis processing unit 7 adapted to form an image with the video signal delivered by said camera. The analysis and processing unit 7 includes algorithmic processing means by means of which it is possible to determine in the image whether there are surface defects such as burrs, air bubbles, treads, blisters, protrusions and the like. Since the analysis processing unit 7 is not part of the object of the present invention, but is part of the general knowledge of a person skilled in ...

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Abstract

The invention relates to an illumination device for an inspection station (2) capable of visually determining the presence or absence of defects on the collar surface (s) of a transparent or translucent container (4). Said illumination device according to the invention comprises at least one illumination system (11, 20) for, including said neckline surface (s), according to the whole or part of the angle of incidence included in at least a part of the solid angle of 2π steradians providing quasi-constant illumination at any point on a surface of said neckline; Means (12) for blocking light rays that generate stray reflections.

Description

technical field [0001] The present invention relates to the technical field of photoelectric detection of hollow objects or containers, such as bottles, cans or carafes, usually of transparent or translucent character, to detect possible presence of Surface defects. [0002] More specifically, the object of the invention is directed to the field of testing such containers to detect the presence of surface defects on the neck of the container corresponding to excess or insufficient material, called blisters Or the defect of bubbles, the defect of cracked or flawed neckline, or the defect of so-called line on the neckline. Background technique [0003] The prior art has proposed various means for controlling the quality of the collar of the container in order to remove containers containing flaws that could affect the aesthetic properties of the container or, more seriously, might present a real danger to the user. For example, detection stations comprising an illumination s...

Claims

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Application Information

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IPC IPC(8): G01N21/95
CPCG01N21/9054G01N21/9027G01N21/9036G06V10/145
Inventor 奥利维耶·科勒
Owner TIAMA SOCIETE ANONYME
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