阅读说明：本技术 一种基于不同光源的pet瓶身检测系统及方法 (PET bottle body detection system and method based on different light sources ) 是由 刘林杭 赵岩 牛丽萍 于 2019-11-06 设计创作，主要内容包括：本发明提供了一种基于不同光源的PET瓶身检测系统及方法,属于PET瓶检测技术领域,用于解决快速检测PET空瓶瓶身的缺陷的问题。其包括工作台一、输送带和工作台二,工作台一和工作台二平行放置在地面上,且工作台和工作台二处于同一高度上,输送带固定在工作台一和工作台二上,输送带上固定有PET瓶,工作台一上端面设置有光学模组系统一和光学模组系统二,工作台二上设置有光学模组系统三。本基于不同光源的PET瓶身检测系统及方法采用5个光源两个工位的布局方式,其中三个光源使用平行背光源,用于检测透光度相对低的黑点、冷疤、瘤痕及结晶白化。(The invention provides a PET bottle body detection system and method based on different light sources, belongs to the technical field of PET bottle detection, and is used for solving the problem of rapidly detecting the defects of PET empty bottle bodies. The PET bottle conveying device comprises a first workbench, a conveying belt and a second workbench, wherein the first workbench and the second workbench are placed on the ground in parallel, the first workbench and the second workbench are located at the same height, the conveying belt is fixed on the first workbench and the second workbench, a PET bottle is fixed on the conveying belt, an optical module system and an optical module system are arranged on the upper end face of the first workbench, and an optical module system III is arranged on the second workbench. The PET bottle body detection system and method based on different light sources adopt a layout mode of two stations of 5 light sources, wherein the three light sources use parallel backlight sources and are used for detecting black spots, cold scars, tumor marks and crystallization whitening with relatively low transmittance.)

1. The utility model provides a PET body detecting system based on different light sources, includes workstation (1), conveyer belt (2) and workstation two (12), its characterized in that, workstation (1) and workstation two (12) parallel arrangement are subaerial, and workstation (1) and workstation two (12) are in on the same height, and conveyer belt (2) are located the top of workstation (1) and workstation two (12), have placed PET bottle (3) on conveyer belt (2), and workstation (1) up end is provided with optical module system unified and optical module system two, is provided with optical module system three on workstation two (12).

2. The PET bottle body detection system based on different light sources according to claim 1, wherein the optical module system comprises a second light source (5), a third light source (6), a first camera (8) and a fourth camera (11), the second light source (5) is fixed on the end face of the first workbench (1), the second light source (5) is located on one side of the conveyer belt (2), the second light source (5) forms a 45-degree included angle with the conveyer belt (2), the fourth camera (11) is fixed on the end face of the first workbench (1), the fourth camera (11) is located on the other side of the conveyer belt (2), a lens of the fourth camera (11) is opposite to the second light source (5), the third light source (6) is fixed on the end face of the first workbench (1), the third light source (6) is located on the other side of the conveyer belt (2), the third light source (6) forms a 45-degree included angle with the conveyer belt (2), the first camera (8) is fixed on the end face of the first workbench (1), the first camera (8) is positioned on one side of the conveying belt (2), and a lens of the first camera (8) is over against the third light source (6).

3. The PET bottle body detection system based on different light sources as claimed in claim 2, wherein the second light source (5) is a high-brightness parallel backlight source, and the third light source (6) is a stripe backlight source.

4. The PET bottle body detection system based on different light sources according to claim 1, wherein the optical module system II comprises a first light source (4), a fourth light source (7), a second camera (9) and a third camera (10), the first light source (4) is fixed on the end face of the first workbench (1), the first light source (4) is positioned on one side of the conveyor belt (2), the first light source (4) forms an included angle of 135 degrees with the conveyor belt (2), the third camera (10) is fixed on the end face of the first workbench (1), the third camera (10) is positioned on the other side of the conveyor belt (2), a lens of the third camera (10) is over against the first light source (4), the fourth light source (7) is fixed on the end face of the first workbench (1), the fourth light source (7) is positioned on the other side of the conveyor belt (2), the fourth light source (7) forms an included angle of 135 degrees with the conveyor belt (2), the second camera (9) is fixed on the end face of the first, the second camera (9) is positioned on one side of the conveying belt (2), and a lens of the second camera (9) is over against the fourth light source (7).

5. The PET bottle body detection system based on different light sources as claimed in claim 4, wherein the light source I (4) is a high brightness parallel backlight source, and the light source IV (7) is a stripe backlight source.

6. The PET bottle body detection system based on different light sources as claimed in claim 1, wherein the optical module system III comprises a camera V (13) and a light source V (14), the light source V (14) is fixed below the end face of the second worktable (12), the light source V (14) and the conveyor belt (2) are parallel to each other, the camera V (13) is fixed above the end face of the second worktable (12), and the lens of the camera V (13) is opposite to the light source V (14).

7. The PET bottle body detection system based on different light sources as claimed in claim 6, wherein the light source five (14) is a high brightness backlight source.

8. The detection method of the PET bottle body detection system based on different light sources as claimed in claim 1 is characterized by comprising the following specific steps:

the method comprises the following steps: the PET bottle (3) is placed on the conveyor belt (2), the conveyor belt (2) is started, and the conveyor belt (2) conveys the PET bottle (3) to the detection position until the first detection position is reached;

step two: lightening a second light source (5), starting a fourth camera (11), photographing the PET bottle (3), photographing 1/3 arc surfaces of the PET bottle (3), and transmitting the photographed pictures to a computer screen;

step three: lightening a light source III (6), starting a camera I (8), photographing the PET bottle (3), photographing 1/2 arc surfaces of the PET bottle (3), and transmitting the photographed pictures to a computer screen;

step four: the PET bottle (3) moves along with the conveying belt (2), reaches a second detection position, lights the first light source (4), starts the third camera (10), photographs the PET bottle (3), photographs 1/3 arc surfaces on the other surface of the PET bottle (3), and transmits the photographed photographs to a computer screen;

step five: lightening a fourth light source (7), starting a second camera (9), photographing the PET bottle (3), photographing 1/2 arc surfaces on the other surface of the PET bottle (3), and transmitting the photographed pictures to a computer screen;

step six: the PET bottle (3) moves along with the conveying belt (2), reaches a third detection position, lights a fifth light source (14), starts a fifth camera (13), photographs the PET bottle (3), photographs the remaining 1/3 cambered surfaces of the PET bottle (3), and transmits the photographed photographs to a computer screen;

step seven: the inspector performs an appearance inspection of the PET bottle by observing the picture on the computer screen.

Technical Field

The invention belongs to the technical field of PET bottle detection, relates to a detection system, and particularly relates to a PET bottle body detection system and method based on different light sources.

Background

PET transparent packaging product is more and more sought after by the consumer at present, in beverage trade, dairy products trade, flavouring trade and high-end cosmetics industry have obtained extensive application, because reasons such as production technology, the unusual defect that the body of the bottle often can appear, the sample is observed to conventional detection through adopting a certain fixed angle by one person beside the transfer chain, the direct visual inspection that detects through the naked eye of detection personnel, the luminance and the shape of light source all can directly influence the rate of recognition of people's eye, cause visual fatigue easily, detection efficiency is lower, lead to partial body of the bottle to have the defect and can't detect out.

Disclosure of Invention

The invention aims to provide a PET bottle body detection system and method based on different light sources aiming at the problems in the prior art, and the device aims to solve the technical problems that: how to rapidly detect the defects of the empty PET bottle body.

The purpose of the invention can be realized by the following technical scheme:

the PET bottle body detection system and method based on different light sources comprises a first workbench, a conveying belt and a second workbench, wherein the first workbench and the second workbench are arranged on the ground in parallel, the first workbench and the second workbench are located at the same height, the conveying belt is located above the first workbench and the second workbench, PET bottles are placed on the conveying belt, an optical module system and an optical module system II are arranged on the upper end face of the first workbench, and an optical module system III is arranged on the second workbench.

The working principle of the invention is as follows: the optical module system and the optical module system can respectively shoot defects such as black spots, foreign matters, drawn wires and crystal whitening at the position of the bottle body 1/3, simultaneously can shoot defects such as tumor marks, bubbles, hard rings and cold scars at the position of the bottle body 1/2, and the optical module system can shoot defects such as black spots, foreign matters, drawn wires and crystal whitening at the residual 1/3 position of the bottle body.

The optical module system comprises a second light source, a third light source, a first camera and a fourth camera, wherein the second light source is fixed on the end face of the first workbench, the second light source is located on one side of the conveying belt, the second light source and the conveying belt form an included angle of 45 degrees, the fourth camera is fixed on the end face of the first workbench, the fourth camera is located on the other side of the conveying belt, a lens of the fourth camera is opposite to the second light source, the third light source is fixed on the end face of the first workbench, the third light source is located on the other side of the conveying belt, the third light source and the conveying belt form an included angle of 45 degrees, the first camera is fixed on the end face of the first workbench, the first.

Structure more than adopting, the cooperation of light source two and camera four is used, shoots the 1/3 cambered surface of PET bottle, and the cooperation of light source three and camera is used, shoots the 1/2 cambered surface of PET bottle.

The second light source is a high-brightness parallel backlight source, and the third light source is a stripe backlight source.

By adopting the structure, the high-brightness parallel backlight source is used for detecting defects such as black spots, foreign matters, wiredrawing, crystallization whitening and the like, and the stripe backlight source is used for detecting shooting of defects such as tumor marks, bubbles, hard rings, cold scars and the like.

The second optical module system comprises a first light source, a fourth light source, a second camera and a third camera, the first light source is fixed on the end face of the first workbench, the first light source is located on one side of the conveying belt and forms an included angle with the conveying belt, the third camera is fixed on the end face of the first workbench and is located on the other side of the conveying belt, a lens of the third camera is opposite to the first light source, the fourth light source is fixed on the end face of the first workbench and is located on the other side of the conveying belt and forms an included angle with the conveying belt, the second camera is fixed on the end face of the first workbench and is located on one side of the conveying belt, and a lens of the second.

By adopting the structure, the first light source and the third camera are matched for use, the 1/3 arc surface on the other surface of the PET bottle is shot, and the fourth light source and the second camera are matched for use, and the 1/2 arc surface on the other surface of the PET bottle is shot.

The first light source is a high-brightness parallel backlight source, and the fourth light source is a stripe backlight source.

By adopting the structure, the high-brightness parallel backlight source is used for detecting defects such as black spots, foreign matters, wiredrawing, crystallization whitening and the like, and the stripe backlight source is used for detecting shooting of defects such as tumor marks, bubbles, hard rings, cold scars and the like.

The two light sources are adopted, the stripe light source is fixed, the stripe space and the stripe width are fixed, the program control stripe light source can generate stripe patterns and other various pattern images which are alternated horizontally and vertically, the light source can freely adjust the stripe width and the image offset step distance, the N-frame offset of the images is realized, the stripe colors and the display process can be customized and edited, the automatic execution process and the single-step debugging of the process are realized, the use range of the light source is greatly enhanced, when the fluctuation change of the surface of an object is detected, the stripe shape of the stripe light source is modulated by the surface of the object, the surface three-dimensional shape change can be deduced by utilizing a calibration and an algorithm, even 3D information of the surface of the object is reconstructed, and the stripe light source can also be used for back illumination, namely, the camera and the. The station is suitable for detecting the defects of transparent or semitransparent materials such as glass and the like, and conventionally, the defects are generally detected by adopting a common backlight source or a quasi-parallel backlight source, and are distinguished and detected by utilizing the absorption and refraction of the defects to light, but for small defects, similar to ripples, fine cracks and the like, the contrast of gray scales on an image can be weakened by diffraction of light, detection is difficult, even missing detection is caused, and hidden dangers are brought to the quality of the products. The fringe light source is adopted, the arrangement of a plurality of strip light sources at equal intervals can be considered, the black area without the light sources is arranged at intervals, the area of a light emitting area is shortened by the fringe light source, the defect of slightly changing a light path can refract the boundary of the black area more easily, and accordingly, a shadow appears in the area which is supposed to be a light emitting area of the light source on an image. For a backlight source with a large area, even if the defect of slightly changing the light path refracts the surrounding, the defect is still a luminous area, so that the gray scale change is not large when viewed on an image, and the detection is difficult.

The highlight lamp beads are arranged, light rays are refracted through the layers of special optical membranes layer by layer to achieve the effect of parallel output, the light emitting area and the overall dimension of the highlight parallel backlight can be freely customized, and the highlight parallel backlight is convenient to install and saves space. The high-brightness parallel backlight source can replace a common backlight source to be used for high-precision and large-area product detection, and can be applied to occasions of high-speed movement due to high light source brightness, demand detection under short exposure time is realized, light rays emitted by the high-brightness parallel backlight source are parallel light rays, and the light source is immediately reflected as long as the light rays meet an object shielding the light source, so that the light rays passing through a lens have certain directivity, the edge contour in an image can be clear, and compared with the condition that the light rays do not have guiding property and are scattered to all directions under the condition of using the common backlight source, the high-brightness parallel. When the object shields the light source, the outline is not clear due to diffraction of light rays at various angles; or the problem that the image is not the real edge of an actual object and the like, and the highlight parallel light source is applied to the occasions of detecting the product outline and the small defects of the curved surface, so that the definition of the outline or the defects in the image is higher, and the contrast is stronger.

The optical module system III comprises a camera V and a light source V, the light source V is fixed below the two end faces of the workbench and is parallel to the conveying belt, the camera V is fixed above the two end faces of the workbench, and a lens of the camera V is opposite to the light source V.

By adopting the structure, the light source five and the camera five are matched for use, and the residual 1/3 arc surface of the PET bottle is shot.

A detection method of a PET bottle body detection system based on different light sources comprises the following specific steps:

the method comprises the following steps: placing the PET bottle on a conveying belt, starting the conveying belt, and conveying the PET bottle to a detection position by the conveying belt until the PET bottle reaches a first detection position;

step two: the second light source is lightened, the fourth camera is started, the PET bottle is photographed, the 1/3 arc surface of the PET bottle is photographed, and the photographed picture is transmitted to a computer screen;

step three: lighting a third light source, starting a first camera, photographing the PET bottle, photographing 1/2 arc surfaces of the PET bottle, and transmitting the photographed pictures to a computer screen;

step four: the PET bottle moves along with the conveying belt, reaches a second detection position, lights the first light source, starts the third camera, photographs the PET bottle, photographs 1/3 arc surfaces on the other surface of the PET bottle, and the photographed photographs are transmitted to a computer screen;

step five: lightening a light source IV, starting a camera II, photographing the PET bottle, photographing 1/2 arc surfaces on the other surface of the PET bottle, and transmitting the photographed pictures to a computer screen;

step six: the PET bottle moves along with the conveying belt, reaches a third detection position, lights a fifth light source, starts a fifth camera, photographs the PET bottle 3, photographs the remaining 1/3 cambered surfaces of the PET bottle, and transmits the photographed photographs to a computer screen;

step seven: the inspector performs an appearance inspection of the PET bottle by observing the picture on the computer screen.

Compared with the prior art, the PET bottle body detection system and method based on different light sources have the following advantages:

1. the layout mode of two stations with 5 light sources is adopted, wherein the three light sources use parallel backlight sources and are used for detecting the defect with relatively low transmittance, and the two light sources use stripe backlight sources and are used for detecting the defect caused in the production process.

2. Two light sources form a 90-degree included angle, one light source is placed in parallel with the conveying line, the other station light source adopts two stripe light sources, the two stripe light sources form a 90-degree included angle and are placed, 360-degree dead-angle-free detection defects are completed, and the light sources with different shapes and brightness complete the illumination of the defects according to 5 different lighting sequences.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the circuitry of the present invention;

FIG. 3 is a schematic diagram of the detection result of the stripe backlight source in the present invention;

FIG. 4 is a diagram illustrating the detection result of the parallel light source of the present invention;

in the figure: 1. a first workbench; 2. a conveyor belt; 3. PET bottles; 4. a first light source; 5. a second light source; 6. a third light source; 7. a fourth light source; 8. a first camera; 9. a second camera; 10. a third camera; 11. a fourth camera; 12. a second workbench; 13. a fifth camera; 14. and a light source five.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-3, the present embodiment provides a PET bottle body detection system based on different light sources, including a first workbench 1, a conveyor belt 2 and a second workbench 12, wherein the first workbench 1 and the second workbench 12 are disposed on the ground in parallel, the first workbench 1 and the second workbench 12 are at the same height, the conveyor belt 2 is disposed above the first workbench 1 and the second workbench 12, a PET bottle 3 is disposed on the conveyor belt 2, the upper end surface of the first workbench 1 is provided with a unified optical module system and a second optical module system, and the second workbench 12 is provided with a third optical module system.

The optical module system comprises a light source II 5, a light source III 6, a camera I8 and a camera IV 11, wherein the light source II 5 is fixed on the end surface of a workbench I1, the light source II 5 is positioned on one side of a conveyer belt 2, the light source II 5 and the conveyer belt 2 form an included angle of 45 degrees, the camera IV 11 is fixed on the end surface of the workbench I1, the camera IV 11 is positioned on the other side of the conveyer belt 2, the lens of the camera IV 11 is opposite to the light source II 5, the light source III 6 is fixed on the end surface of the workbench I1, the light source III 6 is positioned on the other side of the conveyer belt 2, the light source III 6 and the conveyer belt 2 form an included angle of 45 degrees, the camera I8 is fixed on the end surface of the workbench I1, the camera I8 is positioned on one side of the conveyer belt 2, and the lens of the camera I8 is opposite to the light source III 6, in the embodiment, the light, the 1/2 arc of the PET bottle 3 was photographed.

Light source two 5 is a high brightness parallel backlight source and light source three 6 is a stripe backlight source.

The second optical module system comprises a first light source 4, a fourth light source 7, a second camera 9 and a third camera 10, the first light source 4 is fixed on the end surface of the first workbench 1, the first light source 4 is positioned on one side of the conveyor belt 2, the first light source 4 forms an included angle of 135 degrees with the conveyor belt 2, the third camera 10 is fixed on the end surface of the first workbench 1, the third camera 10 is positioned on the other side of the conveyor belt 2, the lens of the third camera 10 is opposite to the first light source 4, the fourth light source 7 is fixed on the end surface of the first workbench 1, the fourth light source 7 is positioned on the other side of the conveyor belt 2, the fourth light source 7 forms an included angle of 135 degrees with the conveyor belt 2, the second camera 9 is fixed on the end surface of the first workbench 1, the second camera 9 is positioned on one side of the conveyor belt 2, and the lens of the second camera 9 is opposite to the fourth light source 7, in the embodiment, the, the 1/2 arc surface on the other side of the PET bottle 3 was photographed.

Light source one 4 is a high brightness parallel backlight source and light source four 7 is a stripe backlight source.

The third optical module system comprises a fifth camera 13 and a fifth light source 14, the fifth light source 14 is fixed below the end face of the second workbench 12, the fifth light source 14 is parallel to the conveyor belt 2, the fifth camera 13 is fixed above the end face of the second workbench 12, and a lens of the fifth camera 13 is opposite to the fifth light source 14, in the embodiment, the fifth light source 14 and the fifth camera 13 are matched for use, and the remaining 1/3 cambered surface of the PET bottle 3 is shot.

The detection method of the PET bottle body detection system based on different light sources is characterized by comprising the following specific steps:

the method comprises the following steps: placing the PET bottle 3 on the conveyer belt 2, starting the conveyer belt 2, and conveying the PET bottle 3 to a detection position by the conveyer belt 2 until the first detection position is reached;

step two: the second light source 5 is lightened, the fourth camera 11 is started, the PET bottle 3 is photographed, and the 1/3 arc surface of the PET bottle 3 is photographed;

step three: lightening a third light source 6, starting a first camera 8, photographing the PET bottle 3, and shooting 1/2 arc surfaces of the PET bottle 3;

step four: the PET bottle 3 moves along with the conveying belt 2, reaches a second detection position, lights the first light source 4, starts the third camera 10, photographs the PET bottle 3 and photographs the 1/3 cambered surface on the other surface of the PET bottle 3;

step five: lightening a fourth light source 7, starting a second camera 9, photographing the PET bottle 3, and shooting the 1/2 cambered surface on the other surface of the PET bottle 3;

step six: the PET bottle 3 moves along with the conveying belt 2, reaches a third detection position, lights the light source five 14, starts the camera five 13, photographs the PET bottle 3 and shoots the remaining 1/3 cambered surfaces of the PET bottle 3;

step seven: the inspector performs an appearance inspection of the PET bottle by observing the picture on the computer screen.

The working principle of the invention is as follows: placing a PET bottle 3 on a conveyer belt 2, starting the conveyer belt 2, conveying the PET bottle 3 to a detection position by the conveyer belt 2 until the PET bottle 3 reaches a first detection position, lighting a second light source 5, starting a fourth camera 11, photographing the PET bottle 3, photographing 1/3 arc surfaces of the PET bottle 3, lighting a third light source 6, starting a first camera 8, photographing the PET bottle 3, photographing 1/2 arc surfaces of the PET bottle 3, enabling the PET bottle 3 to move along with the conveyer belt 2 to reach a second detection position, lighting a first light source 4, starting a third camera 10, photographing the PET bottle 3, photographing 1/3 arc surfaces on the other surface of the PET bottle 3, lighting a fourth light source 7, starting a second camera 9, photographing the PET bottle 3, photographing 1/2 arc surfaces of the other surface of the PET bottle 3, enabling the PET bottle 3 to move along with the conveyer belt 2, reaching a third detection position, lighting a fifth light source 14, starting a fifth camera 13, the PET bottle 3 was photographed to photograph the remaining 1/3 arc surface of the PET bottle 3.

In summary, the invention adopts a layout mode of 5 light sources and two stations, wherein three light sources use parallel backlights for detecting the defect with relatively low transmittance, two light sources use stripe backlights for detecting the defect caused in the production process, one light source is arranged in parallel with the conveying line by forming an included angle of 90 degrees between the two light sources, the other station light source uses two stripe light sources and is arranged at an included angle of 90 degrees, the defect detection with 360 degrees and no dead angle is completed, and the light sources with different shapes and brightness finish the defect illumination according to 5 different lighting sequences.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.