CN107084994B - Transparent container opening crack detection system and method - Google Patents
Transparent container opening crack detection system and method Download PDFInfo
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- CN107084994B CN107084994B CN201710477927.8A CN201710477927A CN107084994B CN 107084994 B CN107084994 B CN 107084994B CN 201710477927 A CN201710477927 A CN 201710477927A CN 107084994 B CN107084994 B CN 107084994B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/958—Inspecting transparent materials or objects, e.g. windscreens
Abstract
The application relates to a transparent container opening crack detection system and a method, wherein the detection system comprises at least one camera light source group and an image processing device, wherein the camera light source group and the image processing device are arranged in the moving direction of a transparent container; the camera light source group comprises at least one light source arranged on the periphery side of the opening of the transparent container and a camera for shooting the opening of the transparent container; the image processing device is connected with the camera and is used for receiving the image of the opening of the transparent container acquired by the camera, processing the image to obtain image information and judging whether the opening of the current transparent container has defects or not according to the image information. The detection speed is high, the detection rate is high, and the detection rate of cracks at the opening of the transparent container reaches more than 85%.
Description
Technical Field
The application relates to the technical field of machine vision automatic detection, in particular to a transparent container mouth crack detection system and method.
Background
At present, a mass-produced glass container is generally processed by adopting a die forming mode. These containers will suffer from various defects during the in-mold forming process, such as cracks, stones, bottle-in-filaments, etc. Among them, the crack is a type of defect which occurs most frequently and is most difficult to detect, and can be classified into a mouth crack, a neck crack, a body crack, a bottom crack, etc. according to the place where it occurs.
Wherein the crack at the opening part is most likely to cause filling leakage, and hidden danger is caused for personal safety of consumers. The need for detection of mouth cracks is generally relatively high, especially for filling containers with a high internal pressure, such as packaging bottles for beer, carbonated beverages, etc., which are intolerable for mouth cracks.
However, the method is obviously contradictory to the situation that the bottle body crack and the bottle bottom crack are easy to realize in terms of the current level of automatic detection equipment for glass containers at home and abroad, but the detection level of the mouth crack and the neck crack is low. For the method for detecting the crack at the mouth, from the equipment imported by some manufacturers of relatively high-priced glass container detection equipment in early Europe to various brands of imitation products in recent years, the basic following principle is the same, namely the method is realized by adopting a laser. A plurality of point-emitting laser transmitters and receivers are arranged around the neck region of the bottle mouth, and whether the container has a burst defect is judged by whether each receiver receives signals of the transmitters during the rotation of the container. This method has three serious drawbacks:
(1) The detection efficiency is low. At present, in order to use the equipment, the domestic glass bottle production line has to divide the packaging line part at the rear end of each production line into two lines so as to match the detection speed of the equipment;
(2) Debugging is difficult. The detection method is not visual, the requirements of equipment debugging on experience are very high, the difference of detection performance of equipment adjusted by people with different capacities is obvious, and standardization cannot be realized;
(3) The detection rate is low. The detection method has generally low detection rate, and the detection rate is generally about 50% according to incomplete statistics. And cannot meet the actual demands of glass bottle production lines.
Disclosure of Invention
In order to overcome the technical problems in the prior art, the application provides a transparent container opening crack detection system which is high in detection speed and detection rate, and the detection rate of the transparent container opening crack is more than 85%.
The technical scheme for solving the technical problems is as follows: a transparent container mouth crack detection system includes at least one camera light source group and an image processing device arranged in a moving direction of a transparent container;
the camera light source group comprises at least one light source arranged on the periphery side of the opening of the transparent container and a camera for shooting the opening of the transparent container;
the image processing device is connected with the camera and is used for receiving the image of the opening of the transparent container acquired by the camera, processing the image to obtain image information and judging whether the opening of the current transparent container has defects or not according to the image information.
On the basis of the technical scheme, the application can be improved as follows.
Further, the light source is a plurality of square light sources or a single annular light source, a plurality of square light sources are sequentially and uniformly arranged at intervals along the outer peripheral side of the opening of the transparent container, and the annular light source is arranged around the outer peripheral side of the opening of the transparent container.
Further, the transparent container is constructed in a structure rotated about its longitudinal center line.
Further, the camera is provided on the upper side of the opening of the transparent container.
Further, the camera light source group further comprises at least one primary reflecting mirror and at least one secondary reflecting mirror, wherein the primary reflecting mirror and the secondary reflecting mirror are arranged on the upper portion of the opening of the transparent container, the primary reflecting mirror is used for acquiring light reflected by the opening of the transparent container, and the secondary reflecting mirror is used for acquiring light reflected by the primary reflecting mirror and reflecting the light to the camera for imaging.
Further, the number of the camera light source groups is two or more, and each camera light source group is distributed at intervals in the moving direction of the transparent container;
in the plurality of camera light source groups, the positions of the light source, the primary reflecting mirror and the secondary reflecting mirror in any one of the camera light source groups relative to the transparent container are determined by uniformly rotating the light source, the primary reflecting mirror and the secondary reflecting mirror in the adjacent camera light source groups by a certain angle, so that multi-view imaging is realized by utilizing the plurality of camera light source groups.
Further, the camera is disposed directly above the mouth of the transparent container.
The application also provides a transparent container opening crack detection method, which comprises the following steps:
acquiring an image of the mouth of the transparent container acquired by a camera;
positioning the obtained transparent container mouth image according to the mouth position characteristics, and extracting the range to be detected of the mouth region;
and (3) carrying out gray scale connected domain detection and edge detection on the opening area of the transparent container, judging whether a crack exists, comparing the data information of the crack with a preset threshold value, and detecting the transparent container with unacceptable crack.
Further, the method also comprises the step of detecting the defect of the bottle mouth fixing characteristic, and specifically comprises the following steps:
detecting a thread breakage defect and/or a thread number of a mouth portion of a transparent container having a thread opening is an insufficient defect, and/or detecting a mouth portion of a transparent container having a lower edge ridge line is a broken defect along the ridge line.
Further, the method further comprises the following steps: the clear container seam line is identified by means of a longitudinal hatched line matching.
Further, the method also comprises detecting the dirt and stone defect of the mouth of the transparent container according to the brightness of each region in the image.
Compared with the prior art, the transparent container mouth crack detection system and method provided by the application have the advantages that the camera light source group and the image processing device are adopted to realize visual detection of the mouth crack of the transparent container mouth, the detection speed is high, the detection speed of more than 72000 bottles/hour can be supported, and the operation speed is more than 10 times that of the traditional detection method; in addition, the detection system is combined with the detection method, so that the detection rate is high, the types of the defects can be detected, the detection rate of the detection system on the deep-fried mouth is more than 85%, and the serious deep-fried mouth can be detected completely; furthermore, the device can detect various mouth defects such as transverse and longitudinal frying mouth, dirt, calculus, thread and bottle edge breakage and the like.
Drawings
FIG. 1 is a schematic diagram of a system for detecting cracks at a mouth of a transparent container according to a second embodiment of the present application;
fig. 2 is a schematic structural diagram of a transparent container mouth crack detection system according to another embodiment of the present application;
FIG. 3 is a schematic structural view of a crack detection system for a mouth of a transparent container according to a second embodiment of the present application;
fig. 4 is a schematic structural diagram of a transparent container mouth crack detection system employing two camera light source groups in the second embodiment of the present application;
fig. 5 is a flow chart of a method for detecting cracks at the mouth of a transparent container according to a third embodiment of the present application.
In the drawings, the list of components represented by the various numbers is as follows:
(1) -camera, (2) -primary mirror, (3) -secondary mirror, (4) -light source, (5) -image processing device, (6) -transparent container mouth, (7) -filter film.
Detailed Description
The principles and features of the present application are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the application and are not to be construed as limiting the scope of the application. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
Example 1
The transparent container mouth crack detection system provided by the embodiment comprises at least one camera light source group and an image processing device, wherein the camera light source group and the image processing device are arranged in the moving direction of the transparent container;
the camera light source group comprises at least one light source arranged on the periphery side of the opening of the transparent container and a camera for shooting the opening of the transparent container;
the image processing device is connected with the camera and is used for receiving the image of the opening of the transparent container acquired by the camera, processing the image to obtain image information and judging whether the opening of the current transparent container has defects or not according to the image information.
In one embodiment, a single light source is selected, the light source is arranged at the side part of the opening of the transparent container, a plurality of light sources can be adopted, the light sources are uniformly arranged at the periphery side of the opening of the transparent container at intervals, the types of the light sources can be square light sources or annular light sources, and when the annular light sources are selected, one annular light source is adopted, and the annular light source is arranged around the periphery side of the opening of the transparent container. The position of the camera can be determined according to the position of the light source and the position of the transparent container, alternatively, the camera can be arranged on the upper part or the side part of the transparent container, so that the imaging of the region of the opening of the transparent container on the light source side can be clearly observed through the camera.
In one embodiment, in order to avoid the influence of other light sources in the environment on shooting the transparent container image, a filter film can be further arranged on the light emitting surface of the light source in the system, and stray light which is mutually interfered between the light sources can be filtered by using the filter film, so that a clear transparent container image can be conveniently shot.
And processing the image acquired by the camera by using the image processing device, extracting image information, judging whether crack defects and other detectable defects exist at the mouth of the transparent container currently detected according to the image information, and removing the detected unqualified transparent container by using the control device. The whole detection process is rapid in cost, can support the detection speed of more than 72000 bottles/hour, and the running speed is more than 10 times of that of the traditional detection method.
Example two
This example provides other implementations of a transparent container finish crack detection system.
The detection system specifically comprises at least one camera light source group and an image processing device, wherein the at least one camera light source group and the image processing device are arranged in the moving direction of the transparent container;
the camera light source group comprises at least one light source arranged on the periphery side of the opening of the transparent container and a camera for shooting the opening of the transparent container;
the image processing device is connected with the camera and is used for receiving the image of the opening of the transparent container acquired by the camera, processing the image to obtain image information and judging whether the opening of the current transparent container has defects or not according to the image information.
In one embodiment, as shown in fig. 1, the camera light source group comprises a camera (1) and a light source (4), and the equivalent observation angle of the camera (1) can be adjusted by means of a multi-stage reflector. Optionally, at least one primary reflecting mirror (2) and at least one secondary reflecting mirror (3) can be arranged on the upper portion of the transparent container opening (6), the primary reflecting mirror (2) is used for acquiring light rays reflected by the transparent container opening (6), and the secondary reflecting mirror (3) is used for acquiring the light rays reflected by the primary reflecting mirror (2) and reflecting the light rays to the camera (1) for imaging.
The primary reflecting mirror (2) can be a plurality of plane reflecting mirrors which are sequentially and uniformly arranged at intervals around the upper part of the opening (6) of the transparent container, for example, the number of the plane reflecting mirrors can be 8, 6 or 4; correspondingly, the adopted light source (4) can also be a plurality of square light sources, and the square light sources can be sequentially and uniformly arranged at intervals along the periphery side of the opening part (6) of the transparent container. Preferably, the longitudinal center line of the structure formed by the plurality of plane reflectors and the longitudinal center line of the structure formed by the plurality of square light sources are located on the same straight line.
The primary mirror (2) may also be a ring-shaped mirror, and the light source (4) used may also be a ring-shaped light source, preferably arranged coaxially with the ring-shaped light source.
In order to avoid the influence of other light sources in the environment on shooting transparent container images, a filter film can be arranged on the light emitting surface of the light source (4) in the system, and stray light which is mutually interfered among the light sources can be filtered by utilizing the filter film (7), so that clear transparent container images can be shot conveniently.
In this embodiment, the camera (1) may be disposed at the upper portion of the transparent container mouth (6), the light source (4) may be a square light source or a ring light source, and if a single square light source is disposed at one side of the transparent container mouth (6), the camera (1) may clearly observe an image of a partial region of the transparent container mouth (6) at one side of the light source (4), and the transparent container mouth visible angle of a single viewing angle is not less than 70 °.
The single visual angle is limited in the detectable angle range of the longitudinal explosion crack, and the main optical axis is in front view of the annular container mouth position to be 0 degrees, so that the container mouth area in the positive and negative small angle ranges can not observe the less obvious longitudinal explosion crack due to the fact that the refraction angle of light rays is too small; and after the positive and negative angles are too large, effective observation is difficult due to the limited size of the light source and the limitation of the observation visual angle, so that the risk of an observation blind area can be brought.
Therefore, the problem of the dead zone can be eliminated by the following embodiments, and the omnibearing fry detecting of the mouth area of the mouth of the transparent container can be realized.
In one embodiment, as shown in fig. 2, the transparent container may be rotated relative to the camera (1), that is, the transparent container is configured to rotate around its longitudinal center line, and the camera (1) is disposed on the upper side of the transparent container opening (6), the light source (4) is disposed on the other side of the transparent container opening (6), for each transparent container, the camera (1) is kept stationary, the transparent container continuously photographs while rotating along its own rotation axis, and at the same time, the image is processed, so that the opening area of the transparent container opening (6) may be comprehensively observed, and the detection rate and the detection effect may be improved.
In one embodiment, as shown in fig. 3, the light source (4) may include 8 square light sources, which are uniformly spaced around the outer peripheral side of the mouth of the transparent container, and 8 primary reflectors (2) corresponding to the square light sources one by one are disposed above the square light sources, where the primary reflectors (2) are plane reflectors, and the 8 primary reflectors (2) should be uniformly and continuously disposed, so that the 8 primary reflectors (2) may be sequentially connected. Optionally, the secondary reflector (3) may be an octagon reflector, and the secondary reflector (3) is disposed on a central line of the structure formed by the 8 primary reflectors (2), that is, a central line of the structure formed by the 8 primary reflectors (2) and a central line of the structure formed by the 8 square light sources should be the same straight line with the central lines of the primary reflectors (2) and the secondary reflectors (3); and the camera is arranged on the extension line of the central line and is higher than the position of the secondary reflecting mirror (3). By utilizing the light path arrangement provided by the embodiment, a camera can be used for simultaneously imaging and observing a plurality of visual angles of the opening of the transparent container, so that the blind areas of all visual angles can be mutually compensated, and the regional image of the opening of the transparent container can be comprehensively observed.
In another embodiment, two or more camera light source groups can be used to realize multi-view observation of the regional image of the mouth of the transparent container. The plurality of camera light source groups can be distributed at intervals in the moving direction of the transparent container, and the positions of the light source, the primary reflecting mirror and the secondary reflecting mirror in any one of the camera light source groups relative to the transparent container are determined by uniformly rotating the light source, the primary reflecting mirror and the secondary reflecting mirror in the adjacent camera light source groups by a certain angle, so that multi-view imaging is realized by utilizing the plurality of camera light source groups. That is, the camera light source groups on different detection stations are different in positions of the light source, the primary reflecting mirror and the secondary reflecting mirror relative to the transparent container, and when the positions of the light source, the primary reflecting mirror and the secondary reflecting mirror in the camera light source group on one detection station are determined, the positions can be used as references, and the positions of the light source, the primary reflecting mirror and the secondary reflecting mirror in the camera light source group on the next station are determined by uniformly rotating the light source, the primary reflecting mirror and the secondary reflecting mirror by a certain angle. For example, as shown in fig. 4, two detection stations may be disposed in the moving direction of the transparent container, one camera light source group, such as a camera light source group a and a camera light source group b, is disposed on the two detection stations, four light sources (4), four primary reflectors (2) and two secondary reflectors (3) corresponding to the four light sources (4) one by one are adopted in each camera light source group, the camera is located right above the center surrounded by the four primary reflectors (2), the transparent container is located right below the center surrounded by the four primary reflectors, and the four light sources (4) are disposed around the outer side of the mouth of the transparent container. After the positions of the light source (4), the primary reflecting mirror (2) and the secondary reflecting mirror (3) on one detection station are determined relative to the transparent container, the positions of the light source (4), the primary reflecting mirror (2) and the secondary reflecting mirror (3) which are determined by unified rotation alpha are the positions of the light source, the primary reflecting mirror (2) and the secondary reflecting mirror (3) on the other detection station relative to the transparent container. The selection of α is related to a specific engineering implementation manner, if the transparent container can realize accurate rotation at any angle between the two detection stations through a mechanical manner, α=0 is optimal for design and debugging, but if the transparent container cannot rotate itself or the rotatable angle is limited, the selection of α needs to be determined by comprehensively considering the observable angle range of each view angle and the rotatable angle of the container, so that the blind areas of each view angle can be mutually compensated, and the overall observation of the regional image of the mouth of the transparent container is facilitated.
By using the transparent container opening crack detection system in one or more embodiments provided by the embodiment, the area image of the transparent container opening can be comprehensively observed, so that the omnibearing opening detection of the transparent container opening area is realized, and the detection speed and the detection rate are greatly improved.
Example III
As shown in fig. 5, the present embodiment provides a transparent container mouth crack detection system according to the first or second embodiment, which includes:
s1: acquiring an image of the mouth of the transparent container acquired by a camera;
s2: positioning the obtained transparent container mouth image according to the mouth position characteristics, and extracting the range to be detected of the mouth region;
s3: and carrying out gray scale connected domain detection and edge detection on the bottle mouth area, judging whether a crack exists, comparing the data information of the crack with a preset threshold value, and detecting the transparent container with unacceptable crack.
In one embodiment, the method further includes a step of detecting a defect of the bottle mouth fixing feature, which specifically includes:
detecting a thread breakage defect and/or a thread number of a mouth portion of a transparent container having a thread opening is an insufficient defect, and/or detecting a mouth portion of a transparent container having a lower edge ridge line is a broken defect along the ridge line.
For example, each thread line will be clearly seen for a threaded bottle, the lower edge ridge of the mouth will be clearly seen for a beer bottle neck, etc. The appearance of the characteristics characterizes the manufacturing quality of the container bottle mouth, such as the phenomenon that when threads are broken, threads on an image are broken, the number of the threads is insufficient, the number of the threads can be accurately counted in each view angle of the image, and the broken edge shadows can be obviously observed on the image when the threads are broken along the edge under the beer bottle mouth. Therefore, based on the detection system, the accurate detection of the crack of the opening of the transparent container can be realized by adopting a corresponding detection method, the fixed characteristic defect on the opening of the transparent container can be detected, and the overall detection rate of the transparent container is improved.
In one embodiment, the detection method may further include: the clear container seam line is identified by means of a longitudinal hatched line matching.
During the blowing of the container, the seam lines are inevitably produced, with an indefinite degree of conspicuity, but with two distinct characteristics, namely always the 180 degree paired appearance of an exact circumference on the container and a high perpendicularity in the longitudinal direction of the container body, due to process limitations. By the two characteristics of the seam line, the seam line can be accurately identified and eliminated by adopting a longitudinal shadow line matching mode on the image, and interference is avoided for subsequent detection.
In one embodiment, the detection method further comprises detecting contamination and calculus defects of the mouth of the transparent container according to brightness of each region in the image.
Since the mouths of the transparent containers with different characteristics have a fixed form after being blown by a high-precision mold, the image appearance of the mouths of the transparent containers with different types is determined, the areas outside the image should be smooth areas with uniform thickness, the smooth areas with uniform brightness in the image are regarded as the smooth areas, and if dark shadows exist in the areas which should be smooth, the defects such as dirt, stones and the like exist in the areas, and the areas should be regarded as disqualified containers.
After eliminating intrinsic characteristics of bottle mouth and seam line interference, gray scale connected domain detection and edge detection are carried out on the mouth area of the transparent container so as to judge whether transverse and longitudinal explosion cracks exist, and data information of the explosion cracks is compared with a preset threshold value, for example, the data information of the monitored explosion cracks such as length, width, height, brightness and the like is compared with the preset threshold value, and the transparent container with unacceptable explosion cracks is detected
The transparent container mouth crack detection system based on the first or second embodiment shows that the transparent container mouth crack detection method has the following three significant advantages compared with the traditional method through long-time operation in the glass container production field:
1. the detection speed is high, the detection speed of up to 72000 bottles/hour can be supported, and the running speed is more than 10 times of that of the traditional detection method. Compared with the method that the existing production line widely adopted in China needs to divide one production line into two at the rear end of the packaging line to adapt to the speed of detection equipment at present, the method can share one detection equipment by one or even a plurality of production lines, and has very important benign influence on cost reduction, space occupation or the fluency of whole line operation.
2. Easy to install, adjust and maintain. Due to the adoption of the visual detection method, the installation and the software and hardware adjustment are very visual, the rapid debugging of the equipment can be realized, the capability and experience requirements of debugging personnel in the debugging process are very low, and the device is easy to get on hand.
3. The detection rate is high, and the defects can be detected in various ways. The detection method has the advantages that the detection rate of the detection method for the deep-fried mouth is more than 85%, the severe deep-fried mouth can be completely detected, and the detection accuracy is remarkably improved; in addition, the method can detect various mouth defects such as transverse and longitudinal frying mouth, dirt, calculus, thread and bottle edge damage and the like.
In the description of the present application, it should be noted that the positional or positional relationship indicated by the terms "top", "bottom", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
The foregoing description of the preferred embodiments of the application is not intended to limit the application to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the application are intended to be included within the scope of the application.
Claims (9)
1. A transparent container mouth crack detection system, characterized by comprising at least one camera light source group and an image processing device, wherein the camera light source group and the image processing device are arranged in the moving direction of a transparent container;
the camera light source group comprises at least one light source arranged on the periphery side of the opening of the transparent container and a camera for shooting the opening of the transparent container;
the light sources are a plurality of square light sources or a single annular light source, the square light sources are sequentially and uniformly arranged at intervals along the outer peripheral side of the opening of the transparent container, and the annular light source is arranged around the outer peripheral side of the opening of the transparent container;
the transparent container is configured to rotate about its longitudinal centerline;
the image processing device is connected with the camera, and is used for receiving the image of the opening of the transparent container acquired by the camera, processing the image to obtain image information, judging whether the opening of the current transparent container has defects according to the image information, and comprises the following steps:
acquiring an image of the mouth of the transparent container acquired by a camera;
positioning the obtained transparent container mouth image according to the mouth position characteristics, and extracting the range to be detected of the mouth region;
and (3) carrying out gray scale connected domain detection and edge detection on the opening area of the transparent container, judging whether a crack exists, comparing the data information of the crack with a preset threshold value, and detecting the transparent container with unacceptable crack.
2. The transparent container finish crack detection system according to claim 1, wherein the camera is disposed on an upper side of the transparent container finish.
3. The transparent container finish crack detection system according to claim 1, wherein the camera light source group further comprises at least one primary mirror and at least one secondary mirror disposed on an upper portion of the transparent container finish, the primary mirror being configured to capture light reflected by the transparent container finish, the secondary mirror being configured to capture light reflected by the primary mirror and reflect the light to the camera for imaging.
4. The transparent container mouth crack detection system according to claim 3, wherein the number of the camera light source groups is two or more, and each camera light source group is distributed at intervals in the moving direction of the transparent container;
in the plurality of camera light source groups, the positions of the light source, the primary reflecting mirror and the secondary reflecting mirror in any one of the camera light source groups relative to the transparent container are determined by uniformly rotating the light source, the primary reflecting mirror and the secondary reflecting mirror in the adjacent camera light source groups by a certain angle, so that multi-view imaging is realized by utilizing the plurality of camera light source groups.
5. The transparent container finish crack detection system of claim 4, wherein the camera is disposed directly above the transparent container finish.
6. A transparent container finish crack detection method employing the transparent container finish crack detection system according to any one of claims 1 to 5, comprising:
acquiring an image of the mouth of the transparent container acquired by a camera;
positioning the obtained transparent container mouth image according to the mouth position characteristics, and extracting the range to be detected of the mouth region;
and (3) carrying out gray scale connected domain detection and edge detection on the opening area of the transparent container, judging whether a crack exists, comparing the data information of the crack with a preset threshold value, and detecting the transparent container with unacceptable crack.
7. The method of claim 6, further comprising the step of detecting a finish-securing feature defect, and specifically comprising:
detecting a thread breakage defect and/or a thread line shortage defect of a mouth portion of a transparent container having a thread mouth, and/or detecting a broken defect of a lower edge of a mouth portion of a transparent container having a lower edge of a ridge.
8. The transparent container finish crack detection method according to claim 6, further comprising: the clear container seam line is identified by means of a longitudinal hatched line matching.
9. The method of claim 6, further comprising detecting contamination and stone defects of the mouth of the transparent container based on the brightness of each region in the image.
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| DE102018201957A1 (en) * | 2018-02-08 | 2019-08-08 | Krones Ag | Method for controlling bottle cells and bottle washing machine |
| CN109100364A (en) * | 2018-06-29 | 2018-12-28 | 杭州国翌科技有限公司 | A kind of tunnel defect monitoring system and monitoring method based on spectrum analysis |
| CN109406534A (en) * | 2018-11-28 | 2019-03-01 | 广州番禺职业技术学院 | A kind of medicine bottle bottom pull ring defect detecting device and method |
| CN114235844A (en) * | 2021-10-28 | 2022-03-25 | 上海珂明注塑系统科技有限公司 | Detection device and method for acquiring container outer surface image by reflection |
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