阅读说明：本技术 灌装容器中底部异物的检测装置及在线检测系统 (Detection device and online detection system for bottom foreign matters in filling container ) 是由 施陈博 张淳 陶凯 宋允亮 孟广凯 刘学栋 张树君 于 2020-06-03 设计创作，主要内容包括：本发明提供了一种灌装容器中底部异物的检测装置及在线检测系统,其中检测装置包括设置于容器上方的第一光源、设置于容器两侧的两个第二光源及设置于容器下方的相机,第一光源配置为从容器的上方向下照射容器,以利用光线的折射照亮容器的底部的第一区域,两个第二光源则配置为分别从容器的两侧照射容器,以利用光线的反射照亮容器的底部的第二区域,相机配置为从容器的下方拍摄容器的底部,以获得容器的底部图像。本发明的检测装置及在线检测系统通过第一光源和第二光源的共同作用,可获得背光效果、光照均匀的容器底部图像,针对不易检出的沉积在容器底部的片状异物有良好的成像效果,图像质量优于亮场照明、暗场照明下的图像质量,检出率更高。(The invention provides a detection device and an online detection system for bottom foreign matters in a filling container, wherein the detection device comprises a first light source arranged above the container, two second light sources arranged on two sides of the container and a camera arranged below the container, the first light source is configured to irradiate the container downwards from the upper part of the container so as to illuminate a first area of the bottom of the container by utilizing the refraction of light, the two second light sources are configured to irradiate the container respectively from two sides of the container so as to illuminate a second area of the bottom of the container by utilizing the reflection of the light, and the camera is configured to shoot the bottom of the container from the lower part of the container so as to obtain a bottom image of the container. The detection device and the online detection system can obtain the container bottom image with uniform backlight effect and illumination through the combined action of the first light source and the second light source, have good imaging effect on the sheet foreign matters which are not easy to detect and are deposited at the bottom of the container, have better image quality than that under bright field illumination and dark field illumination, and have higher detectable rate.)

1. A detection apparatus for detecting a bottom foreign object in a filled container, wherein the container is transparent or translucent, a transparent or translucent liquid is filled in the container, and a sealing cover is arranged on the top of the container, wherein the detection apparatus comprises:

a first light source disposed above the container and configured to illuminate the container from above the container downward to illuminate a first area of a bottom of the container with refraction of light;

two second light sources respectively arranged at two sides of the container and configured to irradiate the container from the two sides of the container respectively so as to illuminate a second area of the bottom of the container by utilizing the reflection of light rays, wherein the second area is positioned at the inner side of the first area;

a camera disposed below the container and configured to photograph a bottom of the container from below the container to obtain a bottom image of the container.

2. The apparatus for detecting bottom foreign matter in a filling container according to claim 1, wherein

The two second light sources are both located at positions on both sides of the container and are respectively set to irradiate obliquely upwards towards the corresponding side part of the container.

3. The apparatus for detecting the bottom foreign matter in the filling container according to claim 2, wherein the container has a neck region, a shoulder region, and a body region from the top to the bottom, respectively, and a liquid level line in the container is located in the neck region, wherein,

the two second light sources are located on both sides of the neck region and the shoulder region to illuminate a liquid level line and a foam area at the neck region or to illuminate a liquid level line at the neck region and an underside of the sealing cap, thereby illuminating a second region of the bottom of the container other than the first region with reflection of light.

4. The apparatus for detecting bottom foreign matter in a filling container according to claim 3, further comprising:

a convex lens disposed below the container and above the camera, configured to collect the refracted light and the reflected light to the camera.

5. The apparatus for detecting bottom foreign matter in a filling container according to claim 4, wherein

The focal length of the convex lens is f, and the distance between the center of the convex lens and the lower surface of the bottom wall of the container is s₂The height of the body region of the container is h₂Wherein f is 0.5h₂+s₂。

6. The apparatus for detecting bottom foreign matter in a filling container according to claim 4, further comprising:

transparent safety cover, detachably set up in the top of convex lens, and with the diapire interval of container sets up, be used for the protection convex lens.

7. The apparatus for detecting bottom foreign matter in a filling container according to claim 1, wherein

The first light source and the second light source are both surface light sources.

8. An on-line detection system for bottom contaminants in a filled container, comprising:

the detection device of any one of claims 1 to 7;

the conveying device is arranged for conveying the containers along the conveying line and comprises an upstream conveying section and a downstream conveying section, a detection station is defined between the upstream conveying section and the downstream conveying section at an interval, and the detection device is positioned at the detection station; and

a suspended bottle conveying mechanism located at the detection station and configured to suspend the container and convey the container downstream;

the two sides of the container are the two sides of the container in the moving direction.

9. The system for on-line detection of bottom contaminants in filled containers according to claim 8, wherein

The bottle hanging and conveying mechanism comprises two bottle clamping belts which are positioned at the lower positions of the two sides of the container, and the two bottle clamping belts are at the same speed and are at the same speed as the conveying device.

10. The system for on-line detection of bottom contaminants in filled containers according to claim 8, further comprising:

a container bottom wall cleaning mechanism located at the inspection station and upstream of the inspection device configured to clean an outer surface of the bottom wall of the container.

Technical Field

The invention relates to the technical field of machine vision, in particular to a detection device and an online detection system for bottom foreign matters in a filling container.

Background

In order to detect whether or not impurities such as particles and hairs are mixed in the liquid in the container during the production process, the filling container needs to be detected.

At present, the automatic detection of foreign matters in a filling container generally shakes the container to enable the foreign matters in the container to float, and images are collected for detection, the detection is limited by the mixing speed and time of the container, the foreign matters deposited at the bottom of the container cannot be guaranteed to float completely, and the problem of large omission is solved.

Disclosure of Invention

An object of the present invention is to provide a device and an on-line detection system for detecting a bottom foreign object in a filling container, which at least solve the above problems.

A further object of the present invention is to improve the imaging of the bottom of the container and improve the detection accuracy.

According to an aspect of the present invention, there is provided a device for detecting a foreign substance on a bottom of a container filled with a transparent or translucent liquid, the container being transparent or translucent and having a sealing cap on a top thereof, wherein the device comprises:

a first light source disposed above the container and configured to illuminate the container from above the container downward to illuminate a first area of a bottom of the container with refraction of light;

two second light sources respectively arranged at two sides of the container and configured to irradiate the container from the two sides of the container respectively so as to illuminate a second area of the bottom of the container by utilizing the reflection of light rays, wherein the second area is positioned at the inner side of the first area;

a camera disposed below the container and configured to photograph a bottom of the container from below the container to obtain a bottom image of the container.

Optionally, the two second light sources are both located at positions on two sides of the container and are respectively arranged to irradiate obliquely upwards towards corresponding side portions of the container.

Optionally, the container has a neck region, a shoulder region and a body region from top to bottom, and a liquid level line in the container is located in the neck region, wherein the two second light sources are located at two sides of the neck region and the shoulder region to illuminate the liquid level line and the foam region at the neck region, or illuminate the liquid level line at the neck region and the lower side of the sealing cover, so as to illuminate a second region of the bottom of the container except the first region by reflection of light.

Optionally, the detection apparatus further comprises:

a convex lens disposed below the container and above the camera, configured to collect the refracted light and the reflected light to the camera.

Optionally, the convex lens has a focal length f, and the distance between the center of the convex lens and the lower surface of the bottom wall of the container is s₂The height of the body region of the container is h₂Wherein f is 0.5h₂+s₂。

Optionally, the detection apparatus further comprises:

transparent safety cover, detachably set up in the top of convex lens, and with the diapire interval of container sets up, be used for the protection convex lens.

Optionally, the first light source and the second light source are both surface light sources.

The invention also provides an on-line detection system for bottom foreign matters in a filling container, which comprises:

the detection device of any one of the preceding claims;

the conveying device is arranged for conveying the containers along the conveying line and comprises an upstream conveying section and a downstream conveying section, a detection station is defined between the upstream conveying section and the downstream conveying section at an interval, and the detection device is positioned at the detection station; and

a suspended bottle conveying mechanism located at the detection station and configured to suspend the container and convey the container downstream;

the two sides of the container are the two sides of the container in the moving direction.

Optionally, the bottle hanging conveying mechanism comprises two bottle clamping belts located at the lower positions of two sides of the container, and the two bottle clamping belts are at the same speed and are at the same speed as the conveying device.

Optionally, the online detection system further includes:

a container bottom wall cleaning mechanism located at the inspection station and upstream of the inspection device configured to clean an outer surface of the bottom wall of the container.

According to the detection device and the online detection system for the bottom foreign matters in the filling container, the first light source and the two second light sources act together, a backlight imaging mode is adopted, container bottom images with uniform backlight effect and illumination can be obtained, good imaging effect is achieved for the flake foreign matters deposited at the bottom of the container and not easy to detect, the image quality is superior to that under bright field illumination and dark field illumination, and the detection rate is higher.

Furthermore, the detection device and the online detection system for the bottom foreign matter in the filling container have the advantages that the special design of the position of the second light source is combined with the first light source, the whole area of the bottom of the container can be lightened, a complete image with uniform illumination is obtained, and the imaging quality is improved.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic view of a device for detecting a foreign object at the bottom of a filled container according to an embodiment of the present invention, showing a light path diagram of light emitted from a first light source refracted through the container;

FIG. 2 is a schematic view of a device for detecting a foreign object at the bottom of a filled container according to an embodiment of the present invention, showing a partial light path diagram of light rays emitted by two second light sources reflected by the container;

FIG. 3 is a schematic view of a device for detecting a foreign object at the bottom of a filled container according to an embodiment of the present invention, showing another partial light path diagram of the light emitted by two second light sources reflected by the container;

fig. 4 is a bottom image of a container acquired by a first light source and two second light sources in a detection device for detecting a bottom foreign object in a filled container according to an embodiment of the present invention, where a is a schematic view of a bottom area of the container acquired by the first light source being turned on, B is a schematic view of the bottom area of the container acquired by the two second light sources being turned on, and C is a schematic view of the bottom area of the container acquired by the first light source and the two second light sources being turned on.

FIG. 5 is a schematic view of a filled container according to one embodiment of the present invention; and

fig. 6 is a schematic view of an on-line detection system for bottom contaminants in a filled container according to one embodiment of the present invention.

Detailed Description

The present embodiment first provides a detection device for detecting a bottom foreign object in a filling container 20, and the detection device of the present embodiment will be described in detail below with reference to fig. 1 to 5. The container 20 of the present embodiment is transparent or translucent, the container 20 is filled with transparent or translucent liquid, and the top of the container 20 is provided with a sealing cover 21, that is, the container 20 of the present embodiment is the container 20 filled with liquid and sealed, and the container 20 may be an alcoholic glass bottle, a beverage bottle, a medicine bottle, and the like.

Fig. 1 is a schematic view of a device for detecting a bottom foreign substance in a filling container 20 according to an embodiment of the present invention, in which light emitted from a first light source 10 is refracted through the container 20, fig. 2 is a schematic view of a device for detecting a bottom foreign substance in a filling container 20 according to an embodiment of the present invention, in which light emitted from two second light sources 11 is reflected through the container 20, and fig. 3 is a schematic view of a device for detecting a bottom foreign substance in a filling container 20 according to an embodiment of the present invention, in which another light reflected from the container 20 is shown, and fig. 4 is a bottom image of the container 20 acquired by using the first light source 10 and the two second light sources 11 in the device for detecting a bottom foreign substance in a filling container 20 according to an embodiment of the present invention, wherein a is that the first light source 10 is turned on, the collected bottom area of the container 20 is schematically illustrated, B is the collected bottom area of the container 20 with the two second light sources 11 turned on, and C is the collected bottom area of the container 20 with the first light source 10 and the two second light sources 11 both turned on.

As shown in fig. 1 to 4, the detection device of the present embodiment includes a first light source 10, two second light sources 11 and a camera 12. The first light source 10 is disposed above the container 20 and configured to irradiate the container 20 downward from above the container 20 to illuminate a first region of the bottom of the container 20 by refraction of light, the two second light sources 11 are disposed at two sides of the container 20 and configured to irradiate the container 20 from two sides of the container 20 to illuminate a second region of the bottom of the container 20 by reflection of light, and the camera 12 is disposed below the container 20 and configured to photograph the bottom of the container 20 from below the container 20 to obtain a bottom image of the container 20.

In the present embodiment, by additionally providing the first light source 10 above the container 20, light is emitted from the first light source 10 to the outside area of the container 20 not shielded by the sealing cover 21, and the light is refracted by the container 20 and the liquid therein, so as to illuminate the first area of the bottom of the container 20, as shown in a diagram a in fig. 4, the first light source 10 can illuminate the peripheral area (i.e., the first area) of the bottom of the container 20, but the middle area except the peripheral area cannot be illuminated by the first light source 10 due to the shielding of the sealing cover 21; in this embodiment, by additionally providing two second light sources 11 located at two sides of the container 20, light rays are respectively emitted from the side portions of the container 20 to the container 20 by the two second light sources 11, and the light rays can irradiate an area below the sealing cover 21, which is shielded by the sealing cover 21, of the container 20, and can illuminate a second area through reflection of the container 20, the liquid level line 23 and the like, where the second area is located inside the first area, as shown in a diagram B in fig. 4, the second light source 11 illuminates a middle area of the bottom of the container 20, so that through the combined action of the first light source 10 and the two second light sources 11, by using a backlight imaging mode, more or even all areas of the bottom of the container 20 can be illuminated, a bottom pattern of the container 20 with uniform illumination and better imaging effect is obtained, and thus, a bottom foreign matter condition of the container 20 can be detected more accurately.

In addition, the detection device of the embodiment can obtain the bottom image of the container 20 with a backlight effect and uniform illumination, has a good imaging effect on the flake foreign matters which are not easy to detect and are deposited at the bottom of the container 20, has better image quality than that under bright field illumination and dark field illumination, and has higher detection rate.

Considering the effect of the sealing cover 21, the anti-leakage pad 24 on the lower side of the sealing cover 21 and the possibility of foam 22 accumulation at the liquid level line 23 in the container 20, the position of the second light source 11 on the side of the container 20 has an effect on the size of the second area of the bottom of the container 20 illuminated by the second light source, in some embodiments, the two second light sources 11 may be both positioned on the upper side of the container 20 and respectively arranged to illuminate obliquely upward toward the corresponding side of the container 20, that is, the two second light sources 11 may be positioned closer to the sealing cover 21 than to the bottom end of the container 20 and illuminate obliquely upward the container 20, so as to illuminate the lower side of the sealing cover 21 and the liquid level line 23, or illuminate the liquid level line 23 and the foam area (if foam 22 accumulates at the liquid level line 23, the foam 22 may block some of the light reflected by the sealing cover 21, so that the light reflected by the sealing cover 21 cannot effectively illuminate the corresponding area of the bottom of the container 20), thus, the light can illuminate a larger area of the second region of the bottom of the container 20 through reflection, and the second light source 11 is positioned in the embodiment such that the second region is an intermediate region except the first region, and the second region and the first region cover the entire area of the bottom of the container 20, so that under the action of the first light source 10 and the second light source 11, the detection device of the embodiment can obtain a uniform overall image of the bottom of the container 20, thereby further improving the detection accuracy.

Fig. 5 is a schematic view of a filled container 20 according to one embodiment of the present invention.

With respect to the filling container 20 of the embodiment shown in fig. 5, the container 20 has a neck region 20a, a shoulder region 20b and a body region 20c from top to bottom, respectively, and the liquid level line 23 in the container 20 is located in the neck region 20a, with respect to the filling container 20 of this embodiment, as shown in fig. 1 to 3, fig. 1 and 3 show the light path diagrams of the first light source 10 and the two second light sources 11, respectively. The two second light sources 11 in the detection device can be located at both sides of the neck region 20a and the shoulder region 20b to illuminate the liquid level line 23 and the foam region at the neck region 20a, or illuminate the liquid level line 23 and the lower side of the sealing cover 21 at the neck region 20a (as mentioned above, if the foam 22 is gathered at the liquid level line 23, the foam 22 will block some of the light reflected by the sealing cover 21, so the light reflected by the sealing cover 21 can not effectively illuminate the corresponding region of the bottom of the container 20 at this time), so that, except for illuminating the peripheral region (first region) of the bottom of the container 20 under the action of the first light source 10, the middle region (second region except the first region) of the bottom of the container 20 under the action of the two second light sources 11, through the reflection of the container 20, the reflection of the liquid level line 23 and the foam region, the reflection of the sealing cover 21 (or the anti-leakage pad 24) is illuminated, the first area and the second area cover the whole area of the bottom of the container 20, so that a uniform and complete image of the bottom of the container 20 is obtained through the detection device, and the detection effect is improved.

The first light source 10 and the second light source 11 may be surface light sources to reduce the cost. In an alternative embodiment, the first light source 10 may be a surface light source, and the second light source 11 may be an arc-shaped light source to match the peripheral wall of the container 20, so that the light emitting surface of the second light source 11 is substantially the same distance from the wall of the container 20, improving the illumination uniformity.

In some embodiments, in order to collect the light onto the camera 12, a convex lens 13 may be further disposed between the container 20 and the camera 12, that is, the convex lens 13 is located below the container 20 and above the camera 12, and is configured to collect the aforementioned refracted light and reflected light onto the camera 12, so as to ensure the imaging effect.

Since the container 20 is filled with liquid, the outer surface of the container 20, for example, the outer surface of the bottom wall of the container 20 may be attached with water drops, dirt, foam lubricant, etc., and may drop onto the convex lens 13 below the container 20 to contaminate the convex lens 13, for this reason, the present embodiment detachably arranges a transparent protective cover 14 above the convex lens 13, which is arranged at a distance from the bottom wall of the container 20, for protecting the convex lens 13, and due to the detachable arrangement, it can be drawn out from the space at a distance from the bottom wall of the container 20 for cleaning or directly wiped from the space at a distance from the bottom wall of the container 20, ensuring the cleanness thereof, thereby ensuring the cleanness of the convex lens 13 and avoiding the damage of the convex lens 13 caused by wiping the convex lens 13.

To enhance the imaging effect, the focal length f of the convex lens 13, and the distance s between the center of the convex lens 13 and the lower surface of the bottom wall of the container 20₂Height h of body area 20c of container 20₂Certain size relation needs to be satisfied, and f is preferably 0.5h₂+s₂Therefore, the light can be ensured to be completely converged on the lens of the camera 12 through the refraction of the convex lens 13, and the imaging effect is improved.

The lens of the camera 12 and the convex lens 13 form a lens group with a distance S between them₁Has an influence on the equivalent focal length of the lens assembly, S₁The value of (A) is required to ensure that the camera penetrates the lens group at S₂Can see the entire bottom of the full container 20.

Because the detection device of this embodiment adopts a backlight imaging mode, images are collected from the lower side of the container 20, and the container 20 needs to be suspended, for this reason, in some embodiments, the online container 20 can be suspended by the bottle suspension conveying mechanism 15, so that the camera 12 can collect bottom images of the container 20 conveniently, the bottle suspension conveying mechanism 15 can also be configured to convey the container 20 downstream, the container 20 is always in an online moving state, and the camera 12 can adopt the high-speed industrial camera 12, and collect bottom images of the container 20 at the moment when the container 20 passes through the detection station.

Fig. 6 is a schematic diagram of an online detection system for a bottom foreign object in a filling container 20 according to an embodiment of the present invention.

For the container 20 conveyed on line, the embodiment provides an on-line detection system for the bottom foreign matter in the filling container 20, which comprises the detection device and the conveying device as described in any one of the foregoing, and the suspension bottle conveying mechanism 15 as described in the foregoing. The conveying device is arranged to convey the containers 20 along the conveying line and comprises an upstream conveying section 30 and a downstream conveying section 31, a detection station is defined between the upstream conveying section 30 and the downstream conveying section 31 at an interval, the detection device is located at the detection station, the bottle hanging conveying mechanism 15 is also located at the detection station and is configured to hang the containers 20 and convey the containers 20 downstream, and two sides of the containers 20 are two sides of the containers 20 in the moving direction. So can guarantee that container 20 removes the in-process on line, accomplish the collection of image to the bottom of container 20, realize online intellectual detection system completely, only need shoot and remove to the container 20's of detection station bottom image, can utilize this bottom image to carry out comprehensive, accurate detection to the foreign matter of the bottom of container 20, when improving the detection precision, greatly promote detection efficiency.

The bottle hanging and conveying mechanism 15 may include two bottle clamping belts located at the lower positions on both sides of the container 20, as shown in fig. 1 and 6, that is, the two bottle clamping belts clamp the lower positions on both sides of the container 20, without affecting the arrangement of other components such as the second light source 11, and the two bottle clamping belts are at the same speed and at the same speed as the conveying device, so as to maintain the stability of clamping, promote the container 20 to move downstream at the same speed as the conveying device, ensure the distance between the containers 20 on the conveying line to be constant, and avoid the decrease or increase of the distance between the containers 20 to cause upstream congestion or downstream congestion.

As described above, water drops, dirt, foam lubricant (lubricant on the conveying device) and the like may adhere to the outer surface of the bottom wall of the container 20, and in order to avoid the influence on the convex lens 13 and the lens of the camera 12, the on-line inspection system of the present embodiment may further include a container bottom wall cleaning mechanism 16 located at the inspection station and upstream of the inspection device and configured to clean the outer surface of the bottom wall of the container 20, thereby ensuring the cleaning of the bottom wall of the container 20. As shown in fig. 6, the container bottom wall cleaning mechanism 16 may include an air blowing nozzle 162, a brush 161, and a splash guard 163, wherein water droplets, foam, etc. on the bottom wall of the container 20 are blown off by the air blowing nozzle 162, dirt, foam, etc. on the bottom wall of the container 20 is cleaned by the brush 161, and the bottom wall of the container 20, the air blowing nozzle 162, the brush 161, etc. are isolated from the convex lens 13, etc. located downstream thereof by the splash guard 163, so as to prevent water and foam from splashing onto the convex lens 13 during cleaning, and accordingly, the splash guard 163 should be located downstream of the air blowing nozzle 162 and the brush 161.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.