Cigarette strip appearance detection device

Abstract

The utility model discloses a cigarette carton appearance detection device, and relates to the technical field of appearance detection. The detection device provided by the utility model comprises a support frame, and a camera assembly, a light source assembly and a trigger assembly which are arranged on the support frame, the light source assembly is arranged on the inner wall of the supporting frame and provides uniform light and characteristic light. The trigger assembly is arranged on the side wall of the supporting frame in the first direction. The first direction intersects with the second direction, and the second direction is the conveying direction of the cigarette strips. According to the cigarette carton appearance detection device provided by the utility model, the light source assembly and the camera assembly are triggered in a time-sharing manner through the triggering assembly, so that each part of the cigarette carton is exposed and shot, image data are analyzed, and whether the appearance of the cigarette carton meets the requirement or not is judged. According to the utility model, uniform light and characteristic light are combined in the design of the light source to adapt to different shooting parts so as to meet the light source requirements of different shooting surfaces. The quality of the shot appearance image is improved, and the detection precision is further improved.

Description

Technical Field

[0001] This utility model relates to the field of appearance inspection technology, and more specifically, to a device for inspecting the appearance of cigarette packs. Background Technology

[0002] During the production and processing of cigarette cartons, some defects often occur when packaging carton paper and transparent paper, such as: missing carton paper, long side folded back, horizontal head folded back inward, horizontal head wing torn, reversed carton (white carton), misprinted, large area of ​​missing pattern color, partial damage or missing transparent paper, no transparent paper, no pull string, crooked pull string, wrinkled transparent paper, etc.

[0003] In existing technologies, the arrangement of light sources and / or cameras often fails to meet the requirements for detection accuracy. This results in some surfaces experiencing false detections or missed detections due to insufficient lighting or incorrect shooting angles. Utility Model Content

[0004] In view of this, the present invention provides a cigarette stick appearance inspection device, which can perform specific local inspections on different surfaces or parts of the cigarette stick appearance, and then determine whether the appearance of the cigarette stick meets the requirements through data analysis.

[0005] This utility model provides a cigarette stick appearance inspection device, comprising: a support frame and a camera assembly, a light source assembly, and a trigger assembly disposed on the support frame;

[0006] The camera assembly includes a first camera, a second camera, a third camera, a fourth camera, a fifth camera, and a sixth camera;

[0007] The first camera and the second camera are mounted on the top of the support frame;

[0008] The third camera and the fourth camera are disposed on both sides of the support frame in a first direction;

[0009] The fifth camera and the sixth camera are disposed on both sides of the support frame in a second direction;

[0010] The light source assembly is disposed on the inner wall of the support frame, and the light source assembly provides uniform light and characteristic light;

[0011] The triggering component is disposed on the side wall of the support frame in a first direction;

[0012] The first direction and the second direction intersect, and the second direction is the direction in which the cigarette stick is conveyed.

[0013] In one possible implementation, the first camera is positioned on the axis of symmetry in a second direction of the support frame and is arranged close to the sixth camera;

[0014] The first camera is tilted relative to the vertical direction.

[0015] In one possible implementation, the second camera is positioned close to the fourth and fifth cameras.

[0016] In one possible implementation, the third camera and the fourth camera are positioned on the axis of symmetry of the support frame in the first direction and are perpendicular to the vertical direction.

[0017] In one possible implementation, the fifth camera and the sixth camera are positioned on the axis of symmetry of the support frame in the second direction, and the fifth camera and the sixth camera are tilted relative to the horizontal direction.

[0018] In one possible implementation, the light source assembly includes: a uniform light source, a long light source, a medium light source, and a short light source;

[0019] The uniform light source is arranged around the perimeter of the support frame, the long light sources are spaced apart along the second direction, the medium light sources are arranged at both ends of the support frame in the first direction, and the short light sources are arranged at the corners of the support frame.

[0020] In one possible implementation, the triggering component includes a first sensor;

[0021] The first sensor is located on the side of the third camera closer to the sixth camera.

[0022] In one possible implementation, the triggering component further includes a second sensor;

[0023] The second sensor is located on the side of the third camera closer to the fifth camera.

[0024] Compared with the prior art, the cigarette pack appearance inspection device provided by this utility model achieves at least the following beneficial effects:

[0025] In the embodiments provided by this invention, when the cigarette stick reaches the detection position, the triggering component triggers the light source component and camera component in a time-division manner to expose and photograph various parts of the cigarette stick. The image data is then analyzed to determine whether the appearance of the cigarette stick meets the requirements. This invention combines uniform light and characteristic light in its light source design to adapt to different shooting locations and meet the light source requirements of different shooting surfaces. This improves the quality of the captured appearance image, thereby increasing the accuracy of detection.

[0026] Of course, any product implementing this utility model does not necessarily need to achieve all the technical effects described above at the same time.

[0027] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0029] Figure 1 One of the structural schematic diagrams of a cigarette pack appearance inspection device provided by this utility model;

[0030] Figure 2 A second schematic diagram of a cigarette bar appearance inspection device provided by this utility model;

[0031] Figure 3 A schematic diagram of the light source component structure of a cigarette bar appearance inspection device provided by this utility model. Detailed Implementation

[0032] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0033] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0034] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0035] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0037] This utility model provides a cigarette pack appearance inspection device, referring to... Figure 1 and Figure 2 As shown, this utility model embodiment provides a cigarette stick appearance inspection device 100, including: a support frame 10 and a camera assembly 20, a light source assembly 30 and a trigger assembly 40 disposed on the support frame.

[0038] The detection device 100 is positioned at the exit of the cigarette pack conveyor to inspect its appearance. Specifically, when the cigarette pack reaches the detection position, the trigger component 40 senses it and sends a synchronization signal to the control board. The control board then controls the light source component 30 to expose the pack, while the camera component 20 captures an image of the cigarette pack's appearance. The image data is transmitted to the industrial computer via USB, where the detection software analyzes and processes the data. After comparing it with a template image, the detection result is output to the control board. Simultaneously, the current cigarette pack reaches the rejection position. The control board determines whether to output a rejection signal based on the good / bad cigarette signal output by the software. If the software outputs a bad cigarette signal, the actuator performs the rejection action; an alarm is triggered for any abnormalities.

[0039] It should be noted that both the camera assembly 20 and the light source assembly 30 include several mutually compatible cameras and light sources. Exposure and photography are performed in time intervals, with only one side or part of the cigarette bar being exposed and photographed in a given time interval.

[0040] Specifically, the camera assembly 20 includes a first camera 21, a second camera 22, a third camera 23, a fourth camera 24, a fifth camera 25, and a sixth camera 26;

[0041] The first camera 21 and the second camera 22 are mounted on top of the support frame 10. The first camera 21 is used to photograph the upper surface of the cigarette pack 00. The second camera 22 is used to photograph the pull cord of the cigarette pack 00 (the pull cord is a narrow strip of material attached to the outer surface of the cigarette box (carton), usually printed and laminated with the packaging paper, allowing consumers to easily open the cigarette box by pulling the pull cord).

[0042] The third camera 23 and the fourth camera 24 are positioned on both sides of the support frame 10 in the first direction x. The third camera 23 and the fourth camera 24 are used to photograph the two sides of the smoke bar 00, respectively.

[0043] The fifth camera 25 and the sixth camera 26 are positioned on both sides of the support frame 10 in the second direction y. The fifth camera 25 and the sixth camera 26 are used to photograph the two end faces of the cigarette strip 00, respectively.

[0044] It should be noted that the transmission direction of cigarette stick 00 is from the fifth camera 25 to the sixth camera 26. The first direction x and the second direction y intersect, and the second direction y is the transmission direction of cigarette stick 00.

[0045] Furthermore, the first camera 21 is positioned on the second direction y-axis of symmetry of the support frame 10 and is arranged close to the sixth camera 26. It can be understood that the cigarette stick 00 is conveyed along the second direction y from the side of the sixth camera 26 to the side of the fifth camera 25. The cigarette stick 00 is located in the center of the conveyor belt; therefore, the first camera 21 is also positioned on the second direction y-axis of symmetry to ensure more accurate and deformation-free images. It should be noted that the first camera 21 is tilted relative to the vertical direction, rather than perpendicular to the horizontal plane. This is to ensure that a complete image of the upper surface of the cigarette stick 00 can be captured.

[0046] The second camera 22 is positioned close to the fourth camera 24 and the fifth camera 25. It is understood that the cigarette bar 00 is a cuboid, and the pull cord is located at one end of the cigarette bar 00. When it moves to the detection position, the pull cord is positioned closer to the fifth camera 25. Therefore, by positioning the second camera 22 close to the fourth camera 24 and the fifth camera 25, an image of the pull cord can be captured from one side.

[0047] The third camera 23 and the fourth camera 24 are positioned on the axis of symmetry of the support frame 10 in the first direction x, and perpendicular to the vertical direction. It can be understood that the detection position of the cigarette stick 00 is the geometric center of the projection of the support device 100 onto the horizontal plane. Therefore, by positioning the third camera 23 and the fourth camera 24 on opposite sides of the support frame 10 in the first direction x, and on the axis of symmetry, the complete side view of the cigarette stick 00 can be captured.

[0048] The fifth camera 25 and the sixth camera 26 are positioned on the second y-axis of symmetry of the support frame 10, and are tilted relative to the horizontal direction. As mentioned above, the fifth camera 25 and the sixth camera 26, positioned on the second y-axis of symmetry of the support frame 10, can capture the end face of the cigarette stick 00 more clearly and without deformation. However, it should be noted that since both the fifth camera 25 and the sixth camera 26 are mounted on the support frame 00, in order not to affect the conveying of the cigarette stick 00, the fifth camera 25 and the sixth camera 26 are positioned at the top edge of the support frame 10. Therefore, the orientation of the fifth camera 25 and the sixth camera 26 needs to be tilted.

[0049] Furthermore, referring to Figure 3 As shown, the light source assembly 30 is disposed on the inner wall of the support frame 10, and the light source assembly 30 provides uniform light and characteristic light.

[0050] The light source assembly 30 includes: a uniform light source 31, a long light source 32, a medium light source 33, and a short light source 34.

[0051] It should be noted that, due to the varying sizes of the different surfaces of the cigarette stick 00, and the presence of special areas such as the pull string requiring visual inspection, a combination of uniform light and characteristic light is employed in the light source design.

[0052] Specifically, on the one hand, uniform light is provided by uniform light source 31 and long light source 32. Uniform light source 31 and long light source 32 provide exposure for the first camera 21 to photograph the upper surface of the smoke bar 00, and for the third camera 23 and the fourth camera 24 to photograph the two sides of the smoke bar 00.

[0053] A uniform light source 31 is arranged around the support frame 10, and long light sources 32 are arranged at intervals along the second direction. Both the uniform light source 31 and the long light sources 32 have large luminous areas to provide sufficient brightness. For example, the uniform light source 31 and the long light sources 32 can be spherical integrating light sources. A spherical integrating light source is a device that can provide a highly uniform and stable light field. Its outer shell is a hollow, complete spherical shell, usually made of metal or high-reflectivity plastic. The inner wall of the shell is coated with a high-reflectivity diffuse reflective material, such as barium sulfate or polytetrafluoroethylene. The reflectivity of these materials is typically above 98%, ensuring that light forms a uniform light field after multiple reflections within the sphere. Therefore, it is widely used in photometric measurement, colorimetric measurement, spectral analysis, quality control, and scientific research. In practical applications, it facilitates the extraction of higher-quality images of the tested object, enabling detection and analysis and improving detection performance.

[0054] On the other hand, the characteristic light is provided by a medium light source 33 and a short light source 34. The medium light source 33 is used to provide exposure when the second camera 22 photographs the string of the smoke bar 00. The short light source 34 is used to provide exposure when the fifth camera 25 and the sixth camera 26 photograph the end face of the smoke bar 00.

[0055] Medium light source 33 is positioned at both ends of the support frame 10 in the first direction x, and short light source 34 is positioned at the corner of the support frame 10. Because the area of ​​the pull wire portion and end face of the smoke strip 00 is small, a relatively concentrated light source is required. Medium light source 33 and short light source 34 can be linear light sources. Linear light sources have several advantages: high brightness; the LED beads in a linear light source have a small emission angle, which can better concentrate the light and improve the focusing effect of the illumination; good uniformity, as the arrangement and combination of multiple LED beads in a linear light source can achieve uniform light distribution, avoiding the problem of uneven brightness; and good controllability: the output power of a linear light source is stable and continuously adjustable, suitable for automated control. At the same time, the stable and uniform illumination of the linear light source can make cracks and defects on the surface of objects exhibit obvious fluorescence effects at specific wavelengths, thereby improving the accuracy and efficiency of detection.

[0056] In summary, due to the shape and specific area of ​​the cigarette strip, different sides or parts of its appearance have different lighting requirements. For the larger upper surface and sides, uniform lighting should be used during photography to ensure consistent brightness across the surface, avoiding brightness deviations and facilitating better detection and analysis. For the smaller areas such as the pull wire and end face, characteristic lighting should be used during photography to concentrate the brightness and improve detection accuracy.

[0057] Furthermore, the trigger component 40 is disposed on the side wall of the support frame 10 in the first direction x.

[0058] Triggering component 40 includes a first sensor 41;

[0059] The first sensor 41 is located on the side of the third camera 23 near the sixth camera 26.

[0060] Understandably, the first sensor 41 consists of a through-beam fiber optic head, an amplifier, and other mechanical accessories. When the first sensor 41 detects that the cigarette stick 00 has reached the detection position, it triggers light source exposure and camera capture. In one embodiment, the detection position is the geometric center of the projection of the support frame 10 onto the horizontal plane. At this time, one end of the cigarette stick 00 should cross the axis of symmetry of the support frame 00 in the first direction x; therefore, the first sensor 41 is positioned closer to the sixth camera 26. The position of the first sensor 41 can be adjusted according to the detection position, taking the position of the end of the cigarette stick 00 when it reaches the detection position as the reference.

[0061] Furthermore, the triggering component 40 also includes a second sensor 42;

[0062] The second sensor 42 is located on the side of the third camera 23 that is close to the fifth camera 25.

[0063] Understandably, the second sensor 42 operates on the same principle as the first sensor 41. When the cigarette bar 00 is detected, both sensors are triggered. However, the second sensor 42 will time the triggering period. If the second sensor 42 is triggered and its time exceeds a preset value, it is determined that the cigarette bar 00 is blocked within the detection device 100. At this time, the control board will issue an alarm, prompting the operator to intervene manually due to the blocked cigarette bar.

[0064] In summary, the cigarette pack appearance inspection device provided by this utility model achieves at least the following beneficial effects:

[0065] In the embodiments provided by this invention, when the cigarette stick reaches the detection position, the triggering component triggers the light source component and camera component in a time-division manner to expose and photograph various parts of the cigarette stick. The image data is then analyzed to determine whether the appearance of the cigarette stick meets the requirements. This invention combines uniform light and characteristic light in its light source design to adapt to different shooting locations and meet the light source requirements of different shooting surfaces. This improves the quality of the captured appearance image, thereby increasing the accuracy of detection.

[0066] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A device for inspecting the appearance of cigarette packs, characterized in that, include: A support frame and a camera assembly, a light source assembly, and a trigger assembly mounted on the support frame; The camera assembly includes a first camera, a second camera, a third camera, a fourth camera, a fifth camera, and a sixth camera; The first camera and the second camera are mounted on the top of the support frame; The third camera and the fourth camera are disposed on both sides of the support frame in a first direction; The fifth camera and the sixth camera are disposed on both sides of the support frame in a second direction; The light source assembly is disposed on the inner wall of the support frame, and the light source assembly provides uniform light and characteristic light; The triggering component is disposed on the side wall of the support frame in a first direction; The first direction and the second direction intersect, and the second direction is the direction in which the cigarette stick is conveyed.

2. The cigarette pack appearance inspection device according to claim 1, characterized in that, The first camera is positioned on the second axis of symmetry of the support frame and is arranged close to the sixth camera; The first camera is tilted relative to the vertical direction.

3. The cigarette pack appearance inspection device according to claim 1, characterized in that, The second camera is positioned close to the fourth and fifth cameras.

4. The cigarette pack appearance inspection device according to claim 1, characterized in that, The third camera and the fourth camera are positioned on the axis of symmetry of the support frame in the first direction and are perpendicular to the vertical direction.

5. The cigarette pack appearance inspection device according to claim 1, characterized in that, The fifth camera and the sixth camera are disposed on the axis of symmetry in the second direction of the support frame, and the fifth camera and the sixth camera are disposed at an angle relative to the horizontal direction.

6. The cigarette pack appearance inspection device according to claim 1, characterized in that, The light source assembly includes: a uniform light source, a long light source, a medium light source, and a short light source; The uniform light source is arranged around the support frame, the long light source is arranged at intervals along the second direction, the medium light source is arranged at both ends of the support frame in the first direction, and the short light source is arranged at the corner of the support frame.

7. The cigarette pack appearance inspection device according to claim 1, characterized in that, The triggering component includes a first sensor; The first sensor is located on the side of the third camera closer to the sixth camera.

8. The cigarette pack appearance inspection device according to claim 7, characterized in that, The triggering component also includes a second sensor; The second sensor is located on the side of the third camera closer to the fifth camera.

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