Carton appearance detection imaging device on packaging production line

Abstract

The utility model relates to the technical field of automatic packaging equipment, in particular to a carton appearance detecting and imaging device on a packaging production line, which comprises a conveying component, a limiting component and an imaging component, the conveying component comprises a feeding belt and a detecting belt, and a speed reducing component is arranged between the feeding belt and the detecting belt to separate cartons. An imaging area is arranged in the middle of the detection belt; the limiting assembly is arranged on the feeding belt so as to guide the two opposite side faces of the carton to be parallel to the conveying direction of the carton. The imaging assembly comprises a top surface camera, front and rear cameras, left and right cameras and four light sources, the top surface camera, the front and rear cameras and the left and right cameras are used for shooting the top surface and four side surfaces of the carton when the carton is in an imaging area state of the detection belt, and the illumination field of view of each light source covers three adjacent surfaces of a corner angle corresponding to the light source, so that the image contrast is enhanced; defect characteristics are highlighted, rapid and accurate detection is carried out, and the problem that the detection efficiency and the detection effect are not ideal in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to automatic packaging equipment technical field especially relates to a carton appearance detection imaging device on packaging production line. BACKGROUND

[0002] In modern packaging production, as important packaging material, the appearance quality of carton is very important. The traditional carton appearance detection relies on manual work, not only inefficient, and is susceptible to subjective factors. In the prior art, the camera shoots carton image, and compares and detects with the template on the processor to improve the detection efficiency. But there are still the following problems: the illumination visual field of light source has blind area, which affects the image quality of camera shooting, and further leads to the detection effect is not ideal; the position of carton is offset when conveying on the belt, which leads to the difference between the image and the template, resulting in missed detection and false detection; the distance between adjacent cartons is too close, and the appearance of the shot carton is not complete.

[0003] Therefore, it is particularly important to develop a device that can automatically, quickly and accurately detect the appearance defects of carton. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at overcoming the insufficient of prior art, and provides a carton appearance detection imaging device on packaging production line.

[0005] In order to realize the above purpose, the technical scheme of the utility model is as follows:

[0006] A carton appearance detection imaging device on packaging production line, including conveying assembly, limiting component and imaging assembly,

[0007] The conveying assembly includes the feeding belt, the detection belt and the discharge belt, the feeding belt, the detection belt and the discharge belt are sequentially arranged from front to back along the conveying direction of carton, and the middle part of the detection belt is provided with an imaging area;

[0008] The limiting component is arranged on the feeding belt and is used for guiding the two opposite side surfaces of the carton to be parallel to the conveying direction of the carton;

[0009] The imaging assembly comprises a top surface camera, two front-rear cameras, two left-right cameras and four light sources, the top surface camera and the front-rear cameras are sequentially arranged along the conveying direction of the carton, and are located above the center line of the detection belt along the conveying direction of the carton, and the top surface camera is located between the two front-rear cameras; in the state that the carton is located in the imaging area of the detection belt, the mounting height of the top surface camera and the two front-rear cameras is higher than the height of the top surface of the carton, the top surface camera is located above the carton, and the two front-rear cameras are located at the front side and the rear side of the carton respectively; the left-right cameras are located on both sides of the detection belt along the conveying direction of the carton, and in the state that the carton is located in the imaging area of the detection belt, the two left-right cameras are located at the left side and the right side of the carton respectively; a light source is arranged between the front-rear camera and the adjacent left-right camera, and in the state that the carton is located in the imaging area of the detection belt, the four light sources are located outside the four corners of the top surface of the carton respectively, so that the illumination field of view of each light source covers three adjacent surfaces of the corner corresponding to the light source.

[0010] As preferred, a speed reduction assembly is further included, the speed reduction assembly is arranged between the feeding belt and the detection belt, and the top surface of the speed reduction assembly is wavy.

[0011] As preferred, in the state that the carton is located in the imaging area of the detection belt, the included angle between the plane where each light source is located and the three adjacent surfaces of the corner corresponding to the light source ranges from 30° to 60°.

[0012] As preferred, in the state that the carton is located in the imaging area of the detection belt, the included angle between the imaging plane of the front-rear camera located at the front side of the carton and the front surface and the top surface of the carton ranges from 40° to 50°, the included angle between the imaging plane of the front-rear camera located at the rear side of the carton and the rear surface and the top surface of the carton ranges from 40° to 50°, the imaging plane of the left-right camera is parallel to the left and right surfaces of the carton, and the imaging plane of the top surface camera is parallel to the top surface of the carton.

[0013] As preferred, a photoelectric induction switch is further included, the photoelectric induction switch is located on one side of the imaging area along the conveying direction of the carton, and the sensing point of the photoelectric induction switch is located at the rear end of the imaging area along the conveying direction of the carton, and the photoelectric induction switch is used to sense whether the carton reaches the rear end of the imaging area along the conveying direction of the carton.

[0014] As preferred, the limiting assembly comprises two limiting plates, an adjusting rod and a mounting bracket, the mounting bracket is mounted on both sides of the feeding belt, the adjusting rod is arranged in the mounting bracket and is fixedly connected with the limiting plates, and the two limiting plates are located above the feeding belt, and the two limiting plates are driven to move close to or away from each other by adjusting the distance between the end of the adjusting rod and the mounting bracket.

[0015] As preferred, the limiting plate comprises a transition section and a guide section, the transition section and the guide section are connected in sequence from front to back along the conveying direction of the carton, the guide section is parallel to the conveying direction of the carton, and the spacing between the two transition sections gradually decreases from front to back along the conveying direction of the carton.

[0016] As preferred, the limiting assembly further comprises an adjusting handle, and the adjusting handle is used for locking the adjusting rod on the mounting bracket.

[0017] As preferred, the positions of the top camera, the front-back camera and the left-right camera and the positions of all the light sources are axisymmetric about the center line of the detection belt.

[0018] As preferred, the imaging assembly further comprises a vertical rod and a fixing plate, the fixing plate is rotationally mounted with the vertical rod, and the top camera, the front-back camera, the left-right camera and the light sources are respectively mounted on the fixing plate.

[0019] Compared with the prior art, the packaging production line carton appearance detection imaging device has the following beneficial effects:

[0020] (1) The packaging production line carton appearance detection imaging device disclosed by the utility model is designed through camera architecture design and light source lighting architecture design on the top surface and four side surfaces of the carton, the illumination field of view of each light source covers three adjacent surfaces of the corners of the carton corresponding to the light source, so that when the images of the top surface and four side surfaces of the carton are shot, the image contrast is improved, the defect features are highlighted, the imaging quality is improved, the software detection difficulty is reduced, and the problems of missed detection and false detection are avoided.

[0021] (2) The packaging production line carton appearance detection imaging device disclosed by the utility model further designs a limiting assembly on the feeding belt, the limiting assembly is used for limiting the carton and adjusting the angle of the carton, so that when the carton is conveyed from the feeding belt to the detection belt, the four side surfaces of the carton can be completely exposed in the shooting field of view range of the front-back camera and the left-right camera, the problem that the difference between the shot image and the template is large due to the deviation of the carton is solved, and the problems of missed detection and false detection are avoided.

[0022] (3) The packaging production line carton appearance detection imaging device disclosed by the utility model further sets a speed reduction assembly between the feeding belt and the detection belt, the carton enters the detection belt after being slowed down by the speed reduction assembly, the conveying speed of the detection belt is greater than that of the feeding belt, so that adjacent cartons are separated, the four side surfaces of the carton located in the imaging area are completely exposed in the shooting field of view range of the front-back camera and the top camera, and the problems of mutual shielding of adjacent cartons and influence on the imaging quality are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a whole structure schematic view of the utility model;

[0024] Figure 2The utility model discloses a top surface camera, front and back camera and left and right camera's framework diagram Figure 1 ;

[0025] Figure 3 The utility model discloses a top surface camera, front and back camera and left and right camera's framework diagram Figure 2 ;

[0026] Figure 4 The utility model discloses a light source framework diagram Figure 1 ;

[0027] Figure 2 The utility model discloses a light source framework diagram Figure 6 ;

[0028] Figures 1 to 6 For the light path schematic drawing of the utility model when shooting the paper box top surface image.

[0029] Fig. 1, conveying assembly;11, feed belt;12, detection belt;13, discharge belt;2, imaging assembly;21, top surface camera;22, front and back camera;23, left and right camera;24, light source;25, vertical rod;26, fixed plate;3, limiting assembly;31, limiting plate;311, transition section;312, guide section;32, adjusting rod;33, mounting bracket;34, adjusting handle;4, speed reducer assembly;5 photoelectric induction switch;6, paper box. DETAILED DESCRIPTION

[0030] The utility model will be explained further below combining with the drawings and specific embodiment. The drawings of the utility model are only schematic to make the utility model easier to understand, and its specific proportion can be adjusted according to design demand. The relative element up-down relationship and the definition of front / back in the figure described in the text should be understood as the relative position of component by the person skilled in the art, so it can be reversed to show the same component, and it should all belong to the range disclosed in the specification.

[0031] Reference Figures 2 to 3 , the paper box appearance detection imaging device on packaging production line is provided, including conveying assembly 1, imaging assembly 2, limiting assembly 3, speed reducer assembly 4 and photoelectric induction switch 5.

[0032] Conveying assembly 1 includes feed belt 11, detection belt 12 and discharge belt 13, and feed belt 11, detection belt 12 and discharge belt 13 are sequentially arranged from front to back along the conveying direction of paper box 6, and the middle part of detection belt 12 is provided with an imaging area.

[0033] The imaging assembly 2 comprises a top surface camera 21, two front-rear cameras 22, two left-right cameras 23, four light sources 24, a vertical rod 25 and a fixing plate 26, the fixing plate 26 is rotationally installed with the vertical rod 25, the top surface camera 21, the front-rear cameras 22, the left-right cameras 23 and the light sources 24 are respectively installed on the fixing plate 26, which is easy to integrate with the existing packaging production line, and by rotating the angle of the fixing plate 26 and the vertical rod 25, the imaging planes of the top surface camera 21, the front-rear cameras 22 and the left-right cameras 23 and the angles of the four light sources 24 and the surface of the carton 6 can be adjusted. Figure 1 The top surface camera 21 and the front-rear cameras 22 are sequentially arranged along the conveying direction of the carton 6 and are located above the center line of the detection belt 12 along the conveying direction of the carton 6, and the top surface camera 21 is located between the two front-rear cameras 22; in the imaging area state of the detection belt 12, the installation heights of the top surface camera 21 and the two front-rear cameras 22 are higher than the height of the top surface of the carton 6, so as to avoid the influence of the top surface camera 21 and the two front-rear cameras 22 on the conveying of the carton 6 on the packaging production line, the top surface camera 21 is located above the carton 6, and the two front-rear cameras 22 are respectively located on the front side and the rear side of the carton 6; the left-right cameras 23 are located on both sides of the detection belt 12 along the conveying direction of the carton 6, and in the imaging area state of the detection belt 12, the two left-right cameras 23 are respectively located on the left side and the right side of the carton 6. Figure 4 The front-rear cameras 22 and the adjacent left-right cameras 23 are provided with a light source 24, the device is compact and easy to integrate with the existing packaging production line. Figure 5 Figure 6 In the imaging area state of the detection belt 12, the four light sources 24 are respectively located outside the four corners of the top surface of the carton 6, so that the illumination field of view of each light source 24 covers three adjacent surfaces of the corner corresponding to the light source 24.

[0034] In the embodiments of the present application, the top surface camera 21, the front-rear cameras 22 and the left-right cameras 23 are all high-resolution industrial cameras, and LED strip lights are selected as the light sources 24, which have the advantages of high efficiency, long service life and low heat, and are suitable for long-time and high-intensity lighting requirements. ​ ​For example, taking the top surface camera 21 shooting the top surface image of the carton 6 as an example, the reflected light of the flat part of the top surface of the carton 6 cannot enter the lens of the top surface camera 21, and the image effect shows a lower gray value; the reflected light of the uneven part enters the lens of the top surface camera 21, and the image effect shows a higher gray value, thereby highlighting the defect features of the top surface of the carton 6. The light source 24 used in the present application has a wide illumination field of view. Through the design of the light source architecture, the illumination field of view of one light source 24 can cover three adjacent surfaces of the carton 6 at the same time. By using four light sources 24 to perform low-angle lighting on the top surface and the four side surfaces of the carton 6, each top surface camera 21, front and rear camera 22 or left and right camera 23 will have two light sources 24 providing illumination, achieving efficient low-angle lighting, effectively reducing the direct reflection of the surface of the carton 6, and improving the image contrast, so that when the high-resolution industrial camera captures the images of the top surface and the four side surfaces of the carton 6 under good lighting conditions, the small defects on the surface of the carton 6 such as scratches, broken holes, stains and damage are more clearly identifiable, ensuring clear and detailed images, thereby improving the imaging quality, reducing the detection difficulty in subsequent defect recognition and analysis in the image processing module, and avoiding missed detection and false detection.

[0035] ‌In specific embodiments, the positions of the top surface camera 21, the front and rear camera 22 and the left and right camera 23 and the positions of all light sources 24 are axisymmetric about the center line of the detection belt 12. When the carton 6 is in the imaging area of the detection belt 12, the angle between the plane where each light source 24 is located and the three adjacent surfaces of the corresponding corner is in the range of 30°-60°; the imaging plane of the front and rear camera 22 located on the front side of the carton 6 is in the range of 40°-50° with the front surface and the top surface of the carton 6; the imaging plane of the front and rear camera 22 located on the rear side of the carton 6 is in the range of 40°-50° with the rear surface and the top surface of the carton 6; the imaging plane of the left and right camera 23 is parallel to the left and right side surfaces of the carton 6; and the imaging plane of the top surface camera 21 is parallel to the top surface of the carton 6. Through the camera architecture design on the top surface and the four side surfaces of the carton 6, the captured images are complete and comprehensive, and through the light source 24 architecture design, the overall device design is compact, the angle between the light source 24 and the surface of the carton 6 is adjusted to avoid reflection during imaging, and the illumination field of view of each light source 24 covers the three adjacent surfaces of the corresponding corner of the carton 6, so that when the images of the top surface and the four side surfaces of the carton 6 are captured, the image contrast is improved, the defect features are highlighted, the imaging quality is improved, the software detection difficulty is reduced, and missed detection and false detection are avoided.

[0036] The deceleration assembly 4 is arranged between the feeding belt 11 and the detection belt 12, and the top surface of the deceleration assembly 4 is wavy. In specific embodiments, the deceleration assembly 4 is made of plastic material, the conveying speed of the detection belt 12 is greater than that of the feeding belt 11, and the carton 6 is decelerated by the deceleration assembly 4 and then enters the detection belt 12, so as to separate adjacent cartons 6, thereby ensuring that the four side surfaces of the carton 6 located in the imaging area are completely exposed to the shooting field of view of the front and rear cameras 22 and the left and right cameras 23, and avoiding the problem that adjacent cartons 6 shield each other and affect the imaging quality.

[0037] The limiting assembly 3 is arranged on the feeding belt 11 and is used for guiding the opposite two side surfaces of the carton 6 to be parallel to the conveying direction of the carton 6. Specifically, the limiting assembly 3 includes two limiting plates 31, an adjusting rod 32, a mounting bracket 33 and an adjusting handle 34. The mounting bracket 33 is mounted on both sides of the feeding belt 11, the adjusting rod 32 is arranged in the mounting bracket 33 and is fixedly connected with the limiting plates 31. The two limiting plates 31 are located above the feeding belt 11. In the embodiments of the present application, the limiting plates 31 extend above the deceleration assembly 4. The distance between the end of the adjusting rod 32 and the mounting bracket 33 is adjusted, so as to drive the two limiting plates 31 to move close to or away from each other. The adjusting handle 34 is used for locking the adjusting rod 32 on the mounting bracket 33. When the adjusting rod 32 needs to be adjusted, the adjusting handle 34 is rotated to loosen the mounting bracket 33 and the adjusting rod 32. The adjusting rod 32 moves in the mounting bracket 33 until the distance between the two limiting plates 31 approaches the width of the carton 6, and the carton 6 can pass between the two limiting plates 31. Then, the adjusting handle 34 is rotated to lock the adjusting rod 32 on the mounting bracket 33. In specific embodiments, a plurality of mounting rods are connected to one limiting plate 31, and a plurality of adjusting handles 34 are arranged. The position of one adjusting rod 32 can be fixed first, and then the positions of other adjusting rods 32 are adjusted. The adjusting handle 34 is convenient to use, and avoids repeatedly taking adjusting tools and adjusting due to one-time locking of the adjusting rod 32 when the position of the limiting plate 31 is fixed.

[0038] In specific embodiments, the limiting plate 31 comprises transition sections 311 and guide sections 312, which are connected in sequence from front to back along the conveying direction of the carton 6, the guide sections 312 are parallel to the conveying direction of the carton 6, the spacing between the two transition sections 311 gradually decreases from front to back along the conveying direction of the carton 6, and the combination of the transition sections 311 and the guide sections 312 gradually adjusts the angle of the carton 6 on the feeding belt 11, avoiding an excessively large adjustment angle that affects the normal operation of the packaging production line. The angle of the carton 6 in the conveying process is adjusted by the limiting plate 31 to ensure that the four sides of the carton 6 are completely exposed in the shooting field of view of the front-back camera 22 and the left-right camera 23 when the carton 6 is conveyed from the feeding belt 11 to the detection belt 12, solving the problem of large differences between the photographed images and the template due to the deviation of the carton 6, and avoiding missed detection and false detection.

[0039] The photoelectric sensing switch 5 is located on one side of the imaging area along the conveying direction of the carton 6, and the sensing point of the photoelectric sensing switch 5 is located at the rear end of the imaging area along the conveying direction of the carton 6. The photoelectric sensing switch 5 is used to sense whether the carton 6 reaches the rear end of the imaging area along the conveying direction of the carton 6 to trigger the top camera 21, the front-back camera 22, and the left-right camera 23 to take pictures.

[0040] During detection, the carton 6 on the feeding belt 11 passes through the transition sections 311 and the guide sections 312 of the limiting plate 31 in sequence to adjust the angle of the carton 6, so that the angles of the cartons 6 entering the detection belt 12 are consistent, thereby ensuring that each surface of the carton 6 can be completely photographed during imaging, facilitating subsequent defect identification and analysis; then the carton 6 enters the detection belt 12 after being slowed down by the deceleration assembly 4, is accelerated by the detection belt 12, and is separated from the adjacent carton 6 through the combination design of the deceleration assembly 4 and the detection belt 12, while also making the speed of the carton 6 entering the imaging area the same, ensuring the stability of imaging; on the detection belt 12, the illumination field of view of the four light sources 24 can cover the top surface and the four side surfaces of the carton 6 to provide good illumination conditions and improve the quality of imaging; when the carton 6 reaches the sensing point, i.e., reaches the rear end of the imaging area along the conveying direction of the carton 6, a shooting instruction is triggered, and the top camera 21, the front-back camera 22, and the left-right camera 23 take pictures of the top surface and the four side surfaces of the carton 6, respectively, to obtain high-quality surface images of the carton 6, which are transmitted to the image processing module for subsequent defect identification and analysis, achieving automatic, rapid, and accurate detection of the appearance defects of the carton 6 and improving the detection efficiency and effect; finally, the carton 6 is conveyed to the next process by the discharge belt 13.

[0041] The above examples are only used to further illustrate the technical solutions of the present application, but the present application is not limited to the examples, and any simple modification, equivalent change and modification made according to the technical essence of the present application to the above examples all fall within the protection scope of the technical solutions of the present application.

Claims

1. A carton appearance detection imaging device on a packaging line, characterized by: The device comprises a conveying assembly, a limiting assembly and an imaging assembly, The conveying assembly comprises a feeding belt, a detecting belt and an output belt, which are arranged in sequence from front to back along the conveying direction of the carton, and the middle part of the detecting belt is provided with an imaging area; The limiting assembly is arranged on the feeding belt and is used for guiding the two opposite sides of the carton to be parallel to the conveying direction of the carton; The imaging assembly comprises a top surface camera, two front and back cameras, two left and right cameras and four light sources, the top surface camera and the front and back cameras are arranged in sequence along the conveying direction of the carton and are located above the middle line of the detecting belt along the conveying direction of the carton, the top surface camera is located between the two front and back cameras, the installation height of the top surface camera and the two front and back cameras is higher than the height of the top surface of the carton when the carton is located in the imaging area of the detecting belt, the top surface camera is located above the carton, and the two front and back cameras are located at the front side and the rear side of the carton respectively, the left and right cameras are located on both sides of the detecting belt along the conveying direction of the carton, the two left and right cameras are located on the left and right sides of the carton respectively when the carton is located in the imaging area of the detecting belt, one light source is arranged between the front and back camera and the adjacent left and right camera, and the four light sources are located outside the four corners of the top surface of the carton when the carton is located in the imaging area of the detecting belt, so that the illumination field of view of each light source covers three adjacent surfaces of the corner corresponding to the light source.

2. A carton appearance detection imaging device on a packaging line according to claim 1, characterized in that: The device further comprises a speed reduction assembly, which is arranged between the feeding belt and the detecting belt, and the top surface of the speed reduction assembly is wavy.

3. A carton appearance detection imaging device on a packaging line according to claim 1, characterized in that: The angle between the plane where each light source is located and the three adjacent surfaces of the corner corresponding to the light source ranges from 30° to 60° when the carton is located in the imaging area of the detecting belt.

4. A carton appearance detection imaging device on a packaging line according to claim 1, characterized in that: The angle between the imaging plane of the front and back camera located at the front side of the carton and the front and top surfaces of the carton ranges from 40° to 50°, the angle between the imaging plane of the front and back camera located at the rear side of the carton and the rear and top surfaces of the carton ranges from 40° to 50°, the imaging plane of the left and right cameras is parallel to the left and right surfaces of the carton, and the imaging plane of the top surface camera is parallel to the top surface of the carton when the carton is located in the imaging area of the detecting belt.

5. A carton appearance detection imaging device on a packaging line according to claim 1, characterized in that: The device further comprises a photoelectric induction switch, which is located on one side of the imaging area along the conveying direction of the carton, and the sensing point of the photoelectric induction switch is located at the rear end of the imaging area along the conveying direction of the carton, and the photoelectric induction switch is used for sensing whether the carton reaches the rear end of the imaging area along the conveying direction of the carton.

6. A carton appearance detection imaging device on a packaging line according to claim 1, characterized in that: The limiting assembly comprises two limiting plates, an adjusting rod and a mounting bracket, the mounting bracket is mounted on both sides of the feeding belt, the adjusting rod is arranged in the mounting bracket and is fixedly connected with the limiting plates, the two limiting plates are located above the feeding belt, and the distance between the end of the adjusting rod and the mounting bracket is adjusted to drive the two limiting plates to move closer to or away from each other.

7. A carton appearance detection imaging device on a packaging line according to claim 6, characterized in that: The limiting plate comprises a transition section and a guide section, the transition section and the guide section are connected in sequence from front to back along the conveying direction of the carton, the guide section is parallel to the conveying direction of the carton, and the spacing between the two transition sections gradually decreases from front to back along the conveying direction of the carton.

8. A carton appearance detection imaging device on a packaging line according to claim 7, characterized in that: The limiting assembly further comprises an adjusting handle for locking the adjusting rod on the mounting bracket.

9. A carton appearance detection imaging device on a packaging line according to claim 1, characterized in that: The positions of the top surface camera, the front and rear cameras and the left and right cameras and the positions of all the light sources are axially symmetrical about the center line of the detection belt.

10. A carton appearance detection imaging device on a packaging line according to claim 1, characterized in that: The imaging assembly further comprises a vertical rod and a fixing plate, the fixing plate is rotationally installed with the vertical rod, and the top surface camera, the front and rear cameras, the left and right cameras and the light sources are respectively installed on the fixing plate.

Images