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Method and device for optically inspecting containers

A container, optical technology, applied in the direction of measuring devices, scientific instruments, optical testing flaws/defects, etc., can solve the impossible detection and reliable evaluation of local color contrast and other problems

Pending Publication Date: 2022-01-11
KRONES AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, in the case of particularly small defects or defects with small curvatures, it is often not possible to detect and reliably evaluate local color contrast

Method used

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  • Method and device for optically inspecting containers
  • Method and device for optically inspecting containers
  • Method and device for optically inspecting containers

Examples

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Embodiment Construction

[0052] figure 1 An exemplary embodiment of a method 100 according to the invention for inspecting a container 2 is shown in the form of a flow chart. will refer to Figure 2—Figure 5C Method 100 is explained in more detail.

[0053] figure 2 An embodiment of a device 1 according to the invention for optically inspecting containers 2 is shown in a perspective view; it can be seen that the inspection unit 10 has a lighting unit 3 and a camera 4 . Arranged between the two is a conveyor 5 which is presently configured as a conveyor belt only by way of example, on which the containers 2 are conveyed in direction R between the lighting unit 3 and the camera 4 (step 101 ). As an example, only a single container 2 currently being inspected is shown. However, the containers 2 are conveyed as a stream of containers on the conveyor 5 and the individual containers are optically inspected between the lighting unit 3 and the camera 4 .

[0054] The lighting unit emits light from the p...

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PUM

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Abstract

The invention relates to a method (100) for optically inspecting containers (2), wherein the containers (2) are transported (101) to an inspection unit (10) with an illumination unit (3) and with a camera (4), wherein the illumination unit (3) emits (102) light from a flat light-emitting surface (30), wherein the light is transmitted or reflected (104) via the containers (2), wherein the camera (4) captures (105) a respective at least one of the containers (2) and the light transmitted or reflected via same in at least one camera image (I), and wherein the at least one camera image (I) is analysed by an image processing unit (6) for intensity information in order to identify (107) foreign bodies (8) and / or defects (7) in the container, wherein the light emitted from the light-emitting surface (30) is locally encoded (103) on the basis of a wavelength characteristic and is captured by the camera (4) in such a way that different emission locations (31-42) on the light-emitting surface (3) can be differentiated (106) from one another in the at least one camera image (I), and that the image processing unit (6) analyses the at least one camera image (I) for location information of the emission locations (31-42), in order to differentiate (108) the defects (7) from the foreign bodies (8).

Description

technical field [0001] The invention relates to a method and a device for optically inspecting containers, having the features of the preambles of claims 1 and 7, respectively. Background technique [0002] Such methods and devices are commonly used to inspect containers for foreign matter and / or defects. For this purpose, the containers are conveyed to an inspection unit with a lighting unit and a camera, so that the containers can be inspected in transmitted or incident light. Wherein the lighting unit emits light from the planar light-emitting surface, which light is transmitted or reflected by the container and is then recorded with the camera as at least one camera image. The at least one camera image is then evaluated with respect to the intensity information by the image processing unit in order to detect foreign objects and / or defects of the container. [0003] For example, such methods and devices are used for sidewall, base and / or fill level inspection of empty c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88G01N21/90
CPCG01N21/90G01N21/9018G01N21/9036G01N2021/8845G01N21/8806
Inventor 安东·尼德迈尔
Owner KRONES AG