CN220438126U - Detection device for bottle flaws - Google Patents

Abstract

The utility model provides a device for detecting bottle flaws, which comprises a parallel light source for irradiating a bottle to be detected and a camera for shooting the bottle to be detected, wherein parallel light emitted by the parallel light source is used for generating total reflection in the side wall of the bottle, the parallel light source irradiates one side of the bottle, and the camera shoots the other side of the bottle; the device can effectively detect micro cracks and shallow cracks on the side wall of the bottle body, and improves the accuracy of the detection of the bottle body.

Description

Detection device for bottle flaws

Technical Field

The utility model relates to the technical field of bottle flaw detection, in particular to a bottle flaw detection device.

Background

For the detection of glass container walls such as ampoule and penicillin bottle in the market, as shown in fig. 1 and 2, the common detection method is to irradiate the bottle by parallel light backlight, and the industrial camera shoots the sequential pictures of the bottle irradiated by the parallel light to detect whether the crack exists, but the method has no detection effect on small crack or shallow crack basically. Thus, the detection of flat cracks in glass containers is currently a major challenge for inspection by a light inspection machine.

Disclosure of Invention

Based on the technical problems in the prior art, the utility model provides a device for detecting bottle flaws, which has an obvious detection effect on micro cracks or shallow cracks of a container bottle.

In order to achieve the above object, the technical scheme of the present utility model is as follows:

the utility model provides a detection device of bottle flaw, includes the parallel light source that is used for shining the bottle that awaits measuring and is used for shooing the camera of the bottle that awaits measuring, the parallel light that the parallel light source sent is used for taking place total reflection in the bottle lateral wall, the parallel light source shines in one side of bottle, the camera shoot in the opposite side of bottle.

In some embodiments, the parallel light enters the sidewall of the bottle at an incident angle α, wherein the incident angle α of the light satisfies the following condition:

n＝sinα/sinβ；

wherein beta is the refraction angle of the parallel light entering the bottle body, n=1.5-1.9, and beta is more than or equal to 42 degrees and less than 90 degrees.

In some embodiments, the parallel light emitted by the light source is tangential to the sidewall of the bottle.

In some embodiments, the bottle is a clear glass bottle.

In some embodiments, the detection device further comprises a conveying mechanism for conveying the bottle body to the irradiation range of the light source (1) and a rotating mechanism for driving the bottle body to rotate around the central axis of the bottle body.

Compared with the prior art, the utility model has the following beneficial effects:

according to the technical scheme, the parallel light emitted by the parallel light source enters the side wall of the bottle body to be detected to generate total reflection, when the bottle body is flawless, the parallel light generates total reflection on the side wall of the bottle body, and the bottle body shot by the camera is in a darker and uniform shape; when the bottle body has flaws (such as small cracks or shallow cracks within 2 mm) and the like, parallel light is reflected at the flaws, reflected light enters the camera, the flaws form brighter light spots on pictures of the bottle body shot by the camera, and the flaws are obviously compared with the background of the bottle body, so that the flaws on the bottle body are detected.

The device provided by the utility model has the following advantages:

the detection precision is high, and as long as the bottle wall of the bottle body has flaws, the flaws reflect parallel light in the bottle wall to different directions, and the bottle body rotates at least one circle around the central axis of the bottle body in the detection process, the reflection of the flaws can be captured by a camera;

the reliability is high, and the detection is not easy to miss. When the parallel light does not encounter a flaw, total reflection occurs between the inner wall and the outer wall of the side wall of the bottle body, loss in the bottle wall is small, when the flaw is encountered, the reflection intensity of the flaw is high, and the background contrast of the bottle body is strong, so that the contrast of a picture trace shot by a camera is high, and the detection is easy and the detection reliability is high.

Drawings

FIG. 1 is a front view of a position arrangement of a parallel light source, bottle and camera of the present application and prior art;

FIG. 2 is a top view of a prior art arrangement of parallel light sources, bottles and cameras;

FIG. 3 is a top view of the position arrangement of the parallel light source, bottle and camera of the present utility model;

FIG. 4 is a schematic view showing total reflection of parallel light on the sidewall of the bottle when the bottle is flawless;

FIG. 5 is a schematic view of parallel light reflected by a flaw when the bottle is defective;

FIG. 6 is a schematic view of the parallel light portion reflected at the outer wall of the bottle and reflected by a flaw when the bottle is defective when the camera is positioned on the same side as the parallel light source;

wherein, 1-parallel light source; 2-bottle, 3-camera.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the utility model, which is therefore not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

As shown in fig. 1 and 3, a device for detecting bottle flaws includes a parallel light source 1 for illuminating a bottle 2 to be detected and a camera 3 for photographing the bottle 2 to be detected, wherein parallel light emitted by the parallel light source 1 is used for generating total reflection in a side wall of the bottle 2, the parallel light source 1 is illuminated on one side of the bottle 2, and the camera 3 is photographed on the other side of the bottle 2.

The detection device further comprises a conveying mechanism (not shown in the figure) for conveying the bottle body 2 to the irradiation range of the parallel light source 1 and a rotating mechanism (not shown in the figure) for driving the bottle body 2 to rotate around the central axis of the bottle body.

When the bottle body 2 is detected, the conveying mechanism is started to convey the bottle body 2 to the irradiation range of the parallel light source 1, so that parallel light emitted by the parallel light source 1 enters between the inner wall and the outer wall of the side wall of one side of the bottle body 2 at a certain incident angle and is totally reflected, the camera 3 shoots at the other side of the bottle body 2, and meanwhile, the rotating mechanism drives the bottle body 2 to rotate at least one circle around the central axis of the bottle body 2, so that the camera shoots all angles of the side wall of the bottle body 2.

Specifically, in this embodiment, a glass transparent bottle is used as a bottle to be tested for detailed description.

Parallel light enters the side wall of the bottle body 2 at an incident angle alpha, wherein the incident angle alpha of the parallel light meets the following conditions:

n＝sinα/sinβ；

wherein beta is the refraction angle of the parallel light entering the bottle body 2, n=1.5-1.9, and beta is more than or equal to 42 degrees and less than 90 degrees, so that the parallel light completely enters the side wall of the bottle body 2 and is totally reflected between the inner wall and the outer wall of the side wall.

Preferably, the parallel light is tangential to the side wall of the bottle 2.

As shown in fig. 4, when the side wall of the bottle body 2 is flawless, the parallel light is totally reflected between the inner wall and the outer wall of the side wall of the bottle body 2, and along with the rotation of the bottle body, no parallel light enters the camera 3, so that the side wall of the bottle body 2 shot by the camera is in a darker, uniform and complete shape;

as shown in fig. 5, when a defect occurs in the side wall of the bottle 2, the parallel light in the side wall of the bottle 2 is reflected by the defect, and as the bottle 2 rotates, the parallel light reflected by the defect enters the camera 3 at different angles, and a bright light spot is formed on the picture of the side wall of the bottle 2 captured by the camera 3, and the light spot has a high contrast with the background of the bottle 2, so that the light spot is detected.

In the utility model, the camera 3 and the parallel light source 1 are disposed on two sides of the bottle 2 to prevent the light reflected by the outer sidewall surface of the bottle 2 by the parallel light from entering the camera 3, so that the camera 3 can take the picture of the flaw on the bottle 2 to generate an error, thereby causing an error of flaw detection on the bottle. As shown in fig. 6, when the camera 3 and the parallel light source 1 are located on the same side of the bottle 2, a part of light of the parallel light is reflected by the surface of the outer side wall of the bottle 2, and a part of light enters the camera 3, and the parallel light reflected by the flaw enters the camera 3 at the same time, so that the background of the bottle 2 shot by the camera 3 is brighter, the flaw cannot contrast with the background of the bottle 2, and the accuracy of flaw detection of the bottle 2 by the detection device is reduced.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (5)

1. The utility model provides a detection device of bottle flaw, its characterized in that, including being used for shining parallel light source (1) of waiting to detect bottle (2) and being used for shooing camera (3) of waiting to detect bottle (2), parallel light that parallel light source (1) sent is used for taking place total reflection in bottle (2) lateral wall, parallel light source (1) shines in one side of bottle (2), camera (3) shoot in the opposite side of bottle (2).

2. The device for detecting bottle defects according to claim 1, characterized in that said parallel light enters the side wall of the bottle (2) with an angle of incidence α, wherein the angle of incidence α of said parallel light satisfies the following condition:

n＝sinα/sinβ；

wherein beta is the refraction angle of the parallel light entering the bottle body (2), n=1.5-1.9, and beta is more than or equal to 42 degrees and less than 90 degrees.

3. The device for detecting bottle flaws according to claim 1, characterized in that the parallel light emitted by the parallel light source (1) is tangential to the side wall of the bottle (2).

4. The device for detecting bottle defects according to claim 1, wherein the bottle (2) is a transparent glass bottle.

5. The device for detecting bottle defects according to any one of claims 1 to 4, further comprising a conveying mechanism for conveying the bottle (2) to the irradiation range of the parallel light source (1) and a rotating mechanism for driving the bottle (2) to rotate around the central axis thereof.