CN114235844A - Detection device and method for acquiring container outer surface image by reflection - Google Patents
Detection device and method for acquiring container outer surface image by reflection Download PDFInfo
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- CN114235844A CN114235844A CN202111279874.1A CN202111279874A CN114235844A CN 114235844 A CN114235844 A CN 114235844A CN 202111279874 A CN202111279874 A CN 202111279874A CN 114235844 A CN114235844 A CN 114235844A
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- container
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- jig
- positioning
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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
- G01N21/956—Inspecting patterns on the surface of objects
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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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
Abstract
The invention provides a detection device and a detection method for obtaining an image of the outer surface of a container by reflection, wherein the device comprises a positioning jig, and the positioning jig is used for positioning the container; a light assembly for providing a light source; the reflecting element is provided with an annular mirror surface, and the annular mirror surface surrounds the container so that the outer surface of the container reflects 360 degrees on the annular mirror surface; the camera is opposite to the annular mirror surface and shoots the annular mirror surface to form an outer surface image of the container, so that the acquisition efficiency is accelerated, the cost is reduced, the subsequent analysis difficulty is reduced, the camera is also suitable for containers with different specifications and shapes, and the universality is further improved.
Description
Technical Field
The invention relates to the technical field of detection, in particular to a detection device and a detection method for acquiring an image of the outer surface of a container by reflection.
Background
On the automated production lines of food, beverage, medicine and the like, the display information such as pictures and texts is often required to be attached to the outer surface of a container made of plastic and the like, so that the attractiveness of the product is improved, and the information can be indicated. The display modes mainly adopt labeling, printing and the like, but no matter which mode is adopted, the quality of the outer surface image of the container directly influences the sale and use of products, so that the detection of the outer surface image of the container is an essential step, wherein the detection content of the outer surface of the container comprises defects of label distortion, empty label, high label, bottom label, poor printing and the like.
The existing outer surface detection is to acquire outer surface images corresponding to different angles of a container in a multi-camera multi-angle mode, and finally, the outer surface images of all the angles are analyzed to obtain a detection result. Therefore, the detection mode needs a plurality of cameras, and the external surface images at all angles need to be analyzed one by one subsequently, which not only increases the detection cost, but also increases the difficulty of subsequent analysis.
Disclosure of Invention
In order to solve the above problems, the present invention provides a detection apparatus and method for acquiring an image of an outer surface of a container by reflection, which effectively reduces detection cost and improves versatility of detecting the container.
According to one object of the present invention, there is provided a detection device for obtaining an image of an outer surface of a container by reflection, comprising:
a step part is formed on the outer wall of the positioning jig, and the container is sleeved outside the positioning jig from one end of the positioning jig and is abutted against the step part;
a light assembly for providing a light source;
the reflecting element is provided with an annular mirror surface, and the annular mirror surface surrounds the container so that the outer surface of the container reflects 360 degrees on the annular mirror surface;
a camera, opposite the annular mirror, that captures an image of the outer surface of the container.
As a preferred technical scheme, the positioning jig is provided with a jig inner end and a jig outer end, the container is positioned on the positioning jig from the jig inner end, and the camera faces the jig inner end.
As a preferred technical scheme, the camera and the positioning jig are coaxially arranged.
As a preferred technical solution, the optical module includes:
the positioning jig is also provided with a jig through hole penetrating through the inner end of the jig and the outer end of the jig, and the built-in light source is arranged in the jig through hole.
As a preferred technical solution, the optical module includes:
the external light source is provided with an annular light source part, and the external light source is close to the camera in a mode of being far away from the positioning jig so that the annular light source part surrounds and faces the positioning jig.
As a preferred technical solution, the reflection element is sleeved on the positioning fixture in an outward expanding manner, and the annular mirror surface is formed on an inner surface of the reflection element opposite to the container in an inward concave manner.
Preferably, the container comprises a polygonal or circular cup.
According to another object of the present invention, there is also provided a detection method for obtaining an image of an outer surface of a container by reflection, comprising: the outer surface of the container is reflected on the annular mirror surface of the reflecting element by 360 degrees through at least one optical assembly, and the annular mirror surface is shot by a camera to form an outer surface image of the container.
Compared with the prior art, the technical scheme has the following advantages:
the container outer surface is reflected on the annular mirror surface by 360 degrees, so that the whole content of the container outer surface is reflected on the annular mirror surface, the reflected content continuously reflecting all angles of the container outer surface is presented on the annular mirror surface, and then the reflected content on the annular mirror surface is shot by a camera to form an outer surface image of the container. Compared with the multi-angle multi-camera mode in the prior art, the acquisition efficiency is improved, the cost is effectively reduced, the formed outer surface image of the container can directly reflect the content continuously presented on the outer surface of the container, and compared with the prior art that a plurality of images reflecting different angles are analyzed one by one, the analysis efficiency is improved, and the analysis difficulty is effectively reduced. In addition, the shape of the positioning jig is changed, so that the positioning jig is suitable for containers of different shapes, the universality is improved, and the positioning jig can be widely applied to the field of packaging of foods, beverages, medicines and the like.
The invention is further described with reference to the following figures and examples.
Drawings
FIG. 1 is a schematic structural diagram of a detection device for acquiring an image of an outer surface of a container by reflection according to the present invention;
FIG. 2 is a rear view of the inspection apparatus for acquiring images of the exterior surface of a container using reflection according to the present invention;
fig. 3 is a cross-sectional view of the positioning fixture of the present invention.
In the figure: 100 a detection device for acquiring an image of the outer surface of the container by reflection, a 110 positioning jig, a 111 jig inner end, a 112 jig outer end, a 113 jig through hole, an 1141 positioning part, an 1142 fixing part, an 1143 step part, a 120 optical assembly, a 121 internal light source, a 122 external light source, a 1221 annular light source part, a 130 reflection element, a 131 annular mirror surface, a 140 camera and a 200 container.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
As shown in fig. 1 and 2, the inspection apparatus 100 for acquiring an image of an outer surface of a container by reflection includes:
a positioning fixture 110, wherein the positioning fixture 110 is used for positioning the container 200;
a light assembly 120, the light assembly 120 being configured to provide a light source;
a reflective element 130, wherein the reflective element 130 has an annular mirror 131, and the annular mirror 131 surrounds the container 200, so that the outer surface of the container 200 is reflected on the annular mirror 131 by 360 °;
a camera 140, said camera 140 being opposite said ring mirror 131, said ring mirror 131 being photographed to form an image of the outer surface of said container 200.
The outer surface of the container 200 is reflected on the annular mirror 131 by 360 degrees, so that the entire content of the outer surface of the container 200 is reflected on the annular mirror 131, so as to present the reflected content on the annular mirror 131 continuously and reflecting various angles of the outer surface of the container 200, and then the reflected content on the annular mirror 131 is photographed by a camera 140 to form an image of the outer surface of the container 200. Compared with the multi-angle multi-camera mode in the prior art, the acquisition efficiency is improved, the cost is effectively reduced, the formed outer surface image of the container 200 can directly reflect the content continuously presented on the outer surface of the container 200, and compared with the prior art that a plurality of images reflecting different angles are analyzed one by one, the analysis efficiency is improved, and the analysis difficulty is effectively reduced.
It should be noted that the image of the outer surface of the container 200 is used to reflect the entire contents of the outer surface of the container 200, including but not limited to labels, graphics, etc. the present invention utilizes reflection of the outer surface of the container 200 and obtains the image of the outer surface of the container 200 by a camera 140.
As shown in fig. 1 to 3, the positioning fixture 110 has a fixture inner end 111 and a fixture outer end 112, the container 200 is positioned on the positioning fixture 110 from the fixture inner end 111, and the camera 140 faces the fixture inner end 111.
The positioning fixture 110 is divided into a positioning portion 1141 and a fixing portion 1142, and a step portion 1143 formed between the positioning portion 1141 and the fixing portion 1142 from the inner end 111 to the outer end 112 of the fixture. The container 200 has an opening, which is sleeved on the positioning portion 1141 from the inner end 111 direction of the jig and abuts against the step portion 1143, so that the container 200 is positioned on the positioning jig 110.
Specifically, the positioning portion 1141 conforms to the shape of the container 200, so that the inner wall of the container 200 abuts against the outer wall of the positioning portion 1141. For example, the positioning portion 1141 may be used to position the container 200 in a frustum shape when the positioning portion 1141 is in a quadrangular prism shape. Therefore, by replacing the shape of the positioning portion 1141, the container 200 with a corresponding shape can be positioned, so that the universality is improved, and the popularization and the application are facilitated.
The container 200 includes a polygonal cup, a circular cup, or the like, and may be applied to the field of packaging of foods, cosmetics, beverages, medicines, and the like, the foods including yogurt, or the like. The polygonal type comprises a cube, a quadrangular prism, a triangular prism or a cuboid and the like, and the circular type comprises a cylinder, a circular table or a frustum and the like.
As shown in fig. 3, the reflective element 130 is sleeved on the positioning fixture 110 in an outward expanding manner, and the annular mirror 131 is formed on an inner surface of the reflective element 130 opposite to the container 200 in an inward concave manner.
Specifically, the reflective element 130 is fixed outside the fixing portion 1142, and the reflective element 130 extends toward the inner end 111 of the fixture in an outward expanding manner, so that the reflective element 130 forms a horn shape opening toward the inner end 111 of the fixture. At this time, the annular mirror 131 is concave and is located on the inner surface of the reflecting element 130 opposite to the container 200, wherein the size of the annular mirror 131 and the position distance between the annular mirror 131 and the positioning fixture 110 are only required to satisfy the requirement of positioning the container 200 on the positioning portion 1141, and the outer surface thereof can be totally reflected on the annular mirror 131.
With continued reference to fig. 1 and fig. 2, the camera 140 is disposed at a distance from one side of the positioning fixture 110, and the lens of the camera 140 faces the inner end of the fixture, that is, the lens of the camera 140 can be opposite to the annular mirror 131, so as to shoot the content reflected by the annular mirror 131.
The distance between the camera 140 and the positioning fixture 110 is determined by whether the annular mirror 131 is located within the focal length range of the camera 140, that is, the annular mirror 131 is required to be located within the focal length range of the camera 140, so that the camera 140 can shoot all the contents emitted by the annular mirror 131, and the influence on subsequent analysis due to incomplete contents is avoided.
In addition, the camera 140 is disposed coaxially with the positioning fixture 110, that is, the camera 140 is located on the center of the annular mirror 131 and the container 200 to obtain a central image, thereby further preventing the camera 140 from being unable to completely photograph the contents of the annular mirror 131.
As shown in fig. 2 and 3, the light assembly 120 includes:
a built-in light source 121, the positioning fixture 110 further has a fixture through hole 113 penetrating the fixture inner end 111 and the fixture outer end 112, and the built-in light source 121 is disposed in the fixture through hole 113.
Specifically, the built-in light source 121 is sleeved on the fixing portion 1142, which provides illumination for the camera 140 through the bottom wall of the container 200. The container 200 may be made of a light-transmitting material, such as PP, PS, PE, PLA, or other plastic materials.
As shown in fig. 1 and 2, the light assembly 120 includes:
an external light source 122, the external light source 122 has an annular light source portion 1221, the external light source 122 approaches the camera 140 in a manner of being away from the positioning fixture 110, so that the annular light source portion 1221 surrounds and faces the positioning fixture 110.
The external light source 122 is annular, and the camera 140 is located at the center of the external light source 122, so that the annular light source 1221 simultaneously surrounds the positioning fixture 110, the camera 140 and the container 200. The external light source 122 provides illumination for the camera 140 and the container 200 can be reflected by the annular mirror 131, so that the definition of image acquisition is improved, and the accuracy of subsequent analysis is improved.
The internal light source 121 and the external light source 122 can be selectively turned on or off according to the field environment and the use requirement. For example, both the internal light source 121 and the external light source 122 are turned on, at this time, the lighting effect of the light assembly 120 is strongest, and in addition, the brightness of the internal light source 121 and the external light source 122 is adjustable, so as to further improve the usability.
In summary, the outer surface of the container 200 is reflected on the annular mirror 131 by 360 °, so that the entire content of the outer surface of the container 200 is reflected on the annular mirror 131, so as to present the reflected content on the annular mirror 131 continuously and reflecting the outer surface of the container 200 at various angles, and then the reflected content on the annular mirror 131 is photographed by a camera 140, so as to form an image of the outer surface of the container 200. Compared with the multi-angle multi-camera mode in the prior art, the acquisition efficiency is improved, the cost is effectively reduced, the formed outer surface image of the container 200 can directly reflect the content continuously presented on the outer surface of the container 200, and compared with the prior art that a plurality of images reflecting different angles are analyzed one by one, the analysis efficiency is improved, and the analysis difficulty is effectively reduced. In addition, the shape of the positioning jig 110 is changed, so that the positioning jig is applicable to containers 200 in different shapes, improves the universality, and can be widely applied to the packaging fields of food, cosmetics, beverages, medicines and the like.
The invention also provides a detection method for acquiring an image of the outer surface of the container by reflection, which comprises the following steps: the outer surface of the container 200 is reflected on the annular mirror 131 of the reflective element 130 by at least one optical element 120 for 360 °, and the annular mirror 131 is photographed by a camera 140 to form an image of the outer surface of the container 200.
The reflection element 130 is used for presenting a reflection content reflecting all the outer surface of the container 200, then the annular mirror 131 presenting the reflection content is shot through the camera 140, and a corresponding outer surface image of the container 200 is formed, so that the subsequent detection and analysis are waited, and compared with a multi-angle multi-camera mode in the prior art, the method not only improves the acquisition efficiency, but also effectively reduces the cost.
After the outer surface image of the container 200 is obtained, the outer surface image is compared with the reference image by the computer to give a corresponding detection result. If the two are consistent, the detection result is qualified, and if the two are inconsistent, the detection result is unqualified. The term "acceptable" refers to the existence of defects such as label distortion, empty label, high label, bottom label, and poor printing in the label of the container 200. Compared with the prior art that a plurality of images which reflect different angles are analyzed one by one, the analysis efficiency is improved, and the analysis difficulty is effectively reduced.
The light assembly 120 includes an internal light source 121 and/or an external light source 122 to provide illumination for the container 200 reflection and the camera 140, increasing the clarity of image acquisition, and thus improving the accuracy of subsequent analysis.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the scope of the present invention is not limited by the embodiments, i.e. all equivalent changes or modifications made in the spirit of the present invention are still within the scope of the present invention.
Claims (8)
1. A detection device (100) for obtaining images of the external surface of a container by reflection, comprising:
a positioning jig (110), wherein a step part (1143) is formed on the outer wall of the positioning jig (110), and the container (200) is sleeved outside the positioning jig (110) from one end of the positioning jig (110) and is abutted against the step part (1143);
a light assembly (120), the light assembly (120) being configured to provide a light source;
a reflective element (130), said reflective element (130) having an annular mirror (131), said annular mirror (131) surrounding said container (200) such that an outer surface of said container (200) is reflected on said annular mirror (131) for 360 °;
a camera (140), said camera (140) opposing said ring mirror (131), said ring mirror (131) being photographed to form an image of the outer surface of said container (200).
2. The inspection apparatus (100) for obtaining an image of an outer surface of a container according to claim 1, wherein the positioning fixture (110) has an inner fixture end (111) and an outer fixture end (112), the container (200) is positioned on the positioning fixture (110) from the inner fixture end (111), and the camera (140) faces the inner fixture end (111).
3. The inspection apparatus (100) for obtaining an image of an outer surface of a container by reflection according to claim 1, wherein the camera (140) is disposed coaxially with the positioning fixture (110).
4. The inspection apparatus (100) for acquiring an image of an exterior surface of a container using reflection as claimed in claim 2, wherein the optical assembly (120) comprises:
the positioning jig (110) is further provided with a jig through hole (113) penetrating through the jig inner end (111) and the jig outer end (112), and the built-in light source (121) is arranged in the jig through hole (113).
5. The inspection apparatus (100) for obtaining images of the outer surface of a container by reflection according to claim 1 or 4, wherein the optical assembly (120) comprises:
the external light source (122) is provided with an annular light source part (1221), and the external light source (122) is close to the camera (140) in a manner of being far away from the positioning jig (110), so that the annular light source part (1221) surrounds and faces the positioning jig (110).
6. The detecting apparatus (100) for obtaining the image of the outer surface of the container by using reflection according to claim 1, wherein the reflecting element (130) is sleeved on the positioning fixture (110) in an outwardly expanding manner, and the annular mirror surface (131) is formed on the inner surface of the reflecting element (130) opposite to the container (200) in an inwardly concave manner.
7. The inspection device (100) for obtaining images of the exterior surface of a container using reflection as claimed in claim 1, wherein the container (200) comprises a polygonal-type cup or a circular-type cup.
8. A method for obtaining an image of an exterior surface of a container using reflection, comprising: the outer surface of the container (200) is reflected on the annular mirror surface (131) of the reflecting element (130) by at least one optical component (120) in 360 degrees, and the annular mirror surface (131) is shot by a camera (140) to form an outer surface image of the container (200).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111279874.1A CN114235844A (en) | 2021-10-28 | 2021-10-28 | Detection device and method for acquiring container outer surface image by reflection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111279874.1A CN114235844A (en) | 2021-10-28 | 2021-10-28 | Detection device and method for acquiring container outer surface image by reflection |
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| CN202111279874.1A Pending CN114235844A (en) | 2021-10-28 | 2021-10-28 | Detection device and method for acquiring container outer surface image by reflection |
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