A cigarette bubble wrinkle defect detection device using linear laser scanning

Abstract

The application provides a line laser scanning cigarette bubble and wrinkle defect detection device. The line laser scanning cigarette bubble and wrinkle defect detection device comprises a detection assembly, a line laser device and a camera; a transmission assembly is used for transmitting cigarettes and comprises an input belt, a detection rotating wheel and an output belt, the input belt is connected with a cigarette warehouse to transmit cigarettes to the detection rotating wheel, the detection rotating wheel is provided with a containing groove for containing the cigarettes; the line laser device is arranged opposite to the containing groove, so that the line laser generated by the line laser device is parallel to the central axis of the containing groove, and the camera is arranged opposite to the containing groove to shoot an image formed by the line laser irradiated on the surface of the cigarette. The application uses the laser line formed on the surface of the cigarette by the line laser to determine whether the cigarette has a bubble and wrinkle problem.

Description

Technical Field

[0001] This invention relates to the field of cigarette manufacturing technology, specifically to a line laser scanning device for detecting cigarette foaming defects. Background Technology

[0002] Tipping paper is the packaging paper that wraps around the cigarette filter, usually using adhesive to cover it. During the production process, dust and tobacco residue in the working environment, vibrations generated by the packaging mechanism, and substandard adhesive application methods can all cause problems such as wrinkling, tearing, and deformation of the tipping paper during the packing process, affecting the quality of the cigarette product.

[0003] The common method for detecting defects on the outer surface of cigarettes in the existing technology is to acquire image information of the cigarette surface through a visual inspection device and analyze the image information to determine whether the cigarette has quality problems such as wrinkles, damage, or skewness. However, this image-based method is easily affected by light and shadow, which can lead to inaccurate detection results. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by proposing a line laser scanning cigarette wrinkling defect detection device, which uses laser lines formed on the surface of the cigarette by a line laser to determine whether the cigarette has wrinkling problems.

[0005] This invention proposes a line laser scanning device for detecting cigarette wrinkling defects, comprising a detection component including a line laser device and a camera; and a transfer component for transferring cigarettes, including an input belt, a detection wheel, and an output belt. The input belt connects to a cigarette storage compartment and transfers the cigarettes to the detection wheel, which has a receiving groove for accommodating the cigarettes. The line laser device is positioned directly opposite the receiving groove, such that the linear laser beam generated by the line laser device is parallel to the central axis of the receiving groove. This direct alignment with the receiving groove is used to capture an image formed by the linear laser beam illuminating the surface of the cigarette.

[0006] A preferred technical solution of the present invention further includes a rotating assembly, which includes a suction head and a rotating motor. The suction head is connected to a vacuum device for adsorbing cigarettes, and the output shaft of the rotating motor is connected to the suction head to drive the suction head to rotate.

[0007] A preferred technical solution of the present invention is as follows: the central axis of the receiving groove is parallel to the central axis of the detection wheel, the rotating component is disposed on the side of the receiving groove, the suction head adsorption surface is disposed facing the end face of the cigarette, and the central axis of the output shaft of the rotating motor is collinear with the central axis of the receiving groove, so as to drive the cigarette disposed in the receiving groove to rotate around its central axis.

[0008] A preferred technical solution of the present invention is as follows: the two rotating components are symmetrically arranged on both sides of the receiving groove, and the two rotating components rotate the cigarettes in turn by intermittent operation.

[0009] A preferred technical solution of the present invention is as follows: the line laser device and the camera are respectively disposed at both ends of the adjusting rod, the adjusting rod is mounted above the detection wheel by a bracket, and the middle part of the adjusting rod is connected to the bracket.

[0010] A preferred technical solution of the present invention is as follows: the adjusting rod has opening slots at both ends, the line laser device and the camera are rotatably disposed in the opening slots, the opening slots are provided with locking holes, and the locking holes cooperate with bolts to adjust the opening size of the opening slots so as to lock the opening slots so as to hold the line laser device and the camera tightly.

[0011] A preferred technical solution of the present invention is as follows: a plurality of the accommodating grooves are evenly spaced on the circumferential surface of the detection wheel, and the accommodating grooves extend from the circumferential surface of the detection wheel to the center of the detection wheel, and their extension direction is inclined radially relative to the detection wheel.

[0012] A preferred technical solution of the present invention is as follows: the detection wheel is connected to a drive motor, and the drive motor drives the detection wheel to rotate in the direction of inclination of the receiving groove.

[0013] A preferred technical solution of the present invention is as follows: the input belt and the output belt are disposed on the same side of the detection wheel, the input belt is inclined downwards and connects the smoke storage to the detection wheel, and the output belt is inclined downwards and connects the detection wheel to the flat conveyor belt.

[0014] A preferred technical solution of the present invention is that both the input band and the output band are provided with partitions at uniform intervals.

[0015] The line laser scanning cigarette blister defect detection device of the present invention has the following beneficial effects: 1. A detection component is set up based on the principle of line laser detection of cigarette wrinkling problems to capture images formed by the line laser on the surface of the cigarette; 2. Rotating components are installed on both sides of the detection wheel to drive the cigarette to rotate, so that the detection components can capture a complete circumferential surface image of the cigarette; 3. A transmission assembly is set up to transfer cigarettes from top to bottom, and cigarette wrinkling issues are detected in the transmission diagram, which greatly improves space utilization. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram illustrating the cooperation between the detection wheel and the rotating assembly in an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the rotary wheel in an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the detection component in an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the detection component from another perspective in an embodiment of the present invention.

[0022] Figure 6 This is a front view of an embodiment of the present invention.

[0023] In the diagram: 10. Detection component; 11. Line laser device; 111. Line laser; 12. Camera; 13. Adjusting rod; 131. Opening slot; 132. Locking port; 133. Locking hole; 14. Bracket 14; 20. Transfer component; 21. Input belt; 211. Partition; 22. Detection wheel; 221. Drive motor; 222. Receiving slot; 2221. Mouth end; 2222. Bottom end; 23. Output belt; 24. First wheel; 25. Second wheel; 30. Rotating component; 31. Suction head; 32. Rotating motor; 40. Flat conveyor belt; 50. Cigarette storage; 51. Cigarette. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0025] Wrinkling is a quality problem caused by the tipping paper not being fully bonded to the cigarette stick 51, resulting in unevenness and wrinkles on the outer surface of the cigarette stick 51. The principle of line laser detection for wrinkling defects in cigarette stick 51 is as follows: When the line laser 111 irradiates the surface of a normal cigarette stick 51, forming laser lines, the projection contour data of the line laser on the surface of the cigarette stick 51 acquired by the camera 12 is approximately a straight line or a curve with very little waviness; however, when the line laser irradiates the surface of a normal cigarette stick 51, the projection contour data acquired by the camera 12 is a straight line or curve with large radial fluctuations. By fitting the surface contour curve through random sampling consistency, a fitted straight line is obtained; by comparing the line laser contour data acquired during the detection process with the fitted straight line, it can be determined whether there is a wrinkling problem on the surface of the cigarette stick 51.

[0026] Please see Figures 1 to 6 A line laser scanning device for detecting wrinkles in cigarettes 51 includes a detection component 10 and a transfer component 20. The detection component 10 includes a line laser device 11 and a camera 12. The transfer component 20 includes an input belt 21, a detection wheel 22, and an output belt 23. The input belt 21 transports cigarettes 51 from a cigarette storage 50 to the detection wheel 22 for wrinkle detection. The output belt 23 outputs the detected cigarettes 51 and transports them to a conveyor belt 40. The detection wheel 22 is provided with a receiving groove 222. The cigarettes 51 are moved into the receiving groove 222 via the input belt 21. The line laser device 11 is positioned directly opposite the receiving groove 222, so that the linear laser generated by the line laser device 11 is projected onto the outer surface of the cigarettes 51 and parallel to the central axis of the cigarettes 51. The camera 12 is positioned directly opposite the receiving groove 222 to capture an image of the linear laser projected onto the surface of the cigarettes 51.

[0027] Please see Figure 2 and Figure 3 In order to support the cigarette 51 for testing and to minimize the impact of the support on the outer surface of the cigarette 51 when supporting the cigarette 51, this application provides a receiving groove 222 on the testing wheel 22 to support the cigarette 51. The receiving groove 222 includes an opening 2221 formed on the outer circumference of the detection wheel 22 and a bottom end 2222 for supporting the cigarette 51. The line connecting the central axis of the opening end 2221 and the central axis of the bottom end 2222 is inclined relative to the corresponding radius of the opening end 2221, so that the cigarette 51 is not easy to fall out after entering the receiving groove 222 from the opening end 2221. The width of the opening end 2221 is larger than the width of the bottom end 2222 to facilitate the entry of the cigarette 51. At the same time, when the line laser device 11 irradiates the cigarette 51, the size of the opening end 2221 is larger, so that the area of ​​the cigarette 51 that can be exposed is larger while ensuring that the cigarette 51 does not fall out of the receiving groove 222. The line laser device 11 is more likely to irradiate the outer surface of the cigarette 51. The range of motion of the irradiation angle of the line laser device 11 and the camera 12 is larger, which makes it easier to obtain a clearer image.

[0028] Multiple receiving slots 222 are evenly spaced around the detection wheel 22. The detection wheel 22 is externally connected to a drive motor 221, which drives the detection wheel 22 to rotate, so as to realize the continuous detection of continuous cigarettes 51.

[0029] In this embodiment, since the receiving groove 222 is inclined, the wall of the receiving groove 222 forms a stop on the side of the opening end 2221, and the cigarette 51 is not easy to fall out within a certain rotation range. In order to simplify the components, the detection wheel 22 rotates in the inclined direction of the receiving groove 222. The input belt 21 and the output belt 23 are set on the same side of the detection wheel 22. There is no need to set a limiting component on the circumferential periphery of the detection wheel 22. The cigarette 51 can automatically fall onto the output belt 23 when it rotates to below the detection wheel 22.

[0030] Since the cigarette 51 is placed in the receiving groove 222, the area of ​​the line laser device 11 irradiating the outer surface of the cigarette 51 is limited, and the data information that the camera 12 can acquire is limited. It is not possible to completely determine whether a single cigarette 51 has a wrinkling defect. Therefore, a rotating component 30 is further provided on the side of the detection wheel 22 to drive the cigarette 51 in the receiving groove 222 to rotate around its central axis, so as to acquire complete image information on a single cigarette 51.

[0031] The central axis of the receiving groove 222 is parallel to the central axis of the detection wheel 22, and the receiving groove 222 extends through the length of the detection wheel 22 to form openings at both ends of the detection wheel 22. The rotating assembly 30 drives the cigarette 51 to rotate through the openings.

[0032] The rotating assembly 30 includes a suction head 31 and a rotating motor 32. To prevent the suction head 31 from contacting the outer surface of the cigarette 51 when rotating the cigarette 51, which would cause wrinkles on the outer surface of the cigarette 51, the suction head 31 is located at both ends of the receiving groove 222, facing the end face of the cigarette 51. The suction head 31 is a vacuum suction cup, which is connected to a vacuum device. The operation of the vacuum device causes the suction head 31 to generate suction to adsorb the end face of the cigarette 51. The suction head 31 is connected to the output shaft of the rotating motor 32. The central axis of the output shaft of the rotating motor 32 is collinear with the central axis of the receiving groove 222. After the suction head 31 adsorbs the cigarette 51, the rotating motor 32 drives the suction head 31 to drive the cigarette 51 to rotate around its axis, thereby changing the exposed surface of the cigarette 51 at the opening 2221 of the receiving groove 222. The line laser device 11 irradiates different surfaces of the cigarette 51, and the camera 12 can obtain the projection of the line laser device 11 on the complete circumference of the cigarette 51.

[0033] Preferably, the two rotating components 30 are symmetrically arranged at both ends of the receiving groove 222, and the two rotating motors 32 operate intermittently to drive the cigarette 51 to rotate.

[0034] Please see Figure 4 and Figure 5The line laser device 11 and camera 12 are mounted on the detection wheel 22 via a bracket 14. An adjusting rod 13 is provided on the bracket 14, with its middle section connected to the bracket 14. Opening slots 131 are provided at both ends of the adjusting rod 13. The line laser device 11 and camera 12 are respectively positioned within the opening slots 131 at both ends of the adjusting rod 13. A locking slot 132 is provided on the end face of the adjusting rod 13, extending through the thickness direction of the adjusting rod 13 and communicating with the opening slots 131. Locking holes 133 are provided on the two opposite sidewalls of the locking slot 132, and bolts are placed within the locking holes 133. Rotating the bolts causes the two opposite sidewalls of the locking slot 132 to move closer together, thereby contracting the opening slots 131 and securing the line laser device 11 and camera 12 located within the opening slots 131.

[0035] Preferably, the opening slot 131 is a circular slot to facilitate the relative rotation of the line laser device 11 and the camera 12 relative to the adjusting wheel, thereby adjusting the angle. The line laser device 11 is mounted in the opening slot 131 via a clamp, on which a circular rod is provided. The clamp holds the line laser device 11 and connects it to the adjusting rod 13 via the circular rod. The camera 12 is mounted in the opening slot 131 via a connecting seat, on which a circular rod is provided. The camera 12 is fixedly mounted on the connecting seat with bolts and connects to the adjusting rod 13 via the circular rod.

[0036] Preferably, the adjusting rod 13 and the bracket 14 are provided with connecting holes, and the height of the line laser device 11 and the camera 12 can be adjusted by swinging the adjusting rod 13, and then the adjusting rod 13 and the bracket 14 can be fixed by bolts.

[0037] The movement path of cigarette 51 is as follows Figure 6 As shown, the arrow indicates the direction of movement of the cigarette 51. A first rotating wheel 24 is provided below the cigarette storage 50. The structure of the first rotating wheel 24 is the same as that of the detection rotating wheel 22. The cigarette 51 falls from the cigarette storage 50 into the receiving groove 222 of the first rotating wheel 24. The rotation of the first rotating wheel 24 causes the cigarette 51 to fall onto the input belt 21.

[0038] Both the input belt 21 and the output belt 23 are equipped with evenly spaced partitions 211, with a cigarette 51 positioned between every two adjacent partitions 211. The input belt 21 is inclined downwards, with one end positioned below the first roller 24, through which the cigarette 51 is transported intermittently to the space between the two partitions 211. The other end is positioned above the detection roller 22, through which the input belt 21 transports the cigarette 51 to the receiving groove 222 of the detection roller 22. The output belt 23 is also inclined downwards, with one end positioned below the detection roller 22 to receive the detected cigarette 51. Below the other end is a second roller 25, which changes the direction of movement of the cigarette 51. Below the second roller 25 is a flat conveyor belt 40, which transfers the cigarette 51 onto the flat conveyor belt 40 for sorting or transfer to the next production stage.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A line laser scanning device for detecting cigarette bar wrinkling defects, characterized in that, include The detection component (10) includes a line laser device (11) and a camera (12). The transfer component (20) for transferring cigarettes (51) includes an input belt (21), a detection wheel (22) and an output belt (23). The input belt (21) is connected to the cigarette storage (50) to transfer the cigarettes (51) to the detection wheel (22). The detection wheel (22) is provided with a receiving groove (222) for accommodating the cigarettes (51). The line laser device (11) is positioned directly opposite the receiving groove (222), so that the line laser generated by the line laser device (11) is projected onto the outer surface of the cigarette (51) and parallel to the central axis of the cigarette (51). The camera (12) is positioned directly opposite the receiving groove (222) to capture an image of the line laser illuminating the surface of the cigarette (51). The camera (12) is used to acquire the projection contour data of the line laser on the surface of the cigarette (51). By random sampling consistency fitting, a fitted straight line of the surface contour curve is obtained. The line laser contour data acquired during the detection process is compared with the fitted straight line to determine whether there is a wrinkling problem on the surface of the cigarette (51).

2. The line laser scanning cigarette blister defect detection device according to claim 1, characterized in that, It also includes a rotating assembly (30), which includes a suction head (31) and a rotating motor (32). The suction head (31) is connected to a vacuum device for adsorbing cigarette sticks (51). The output shaft of the rotating motor (32) is connected to the suction head (31) to drive the suction head (31) to rotate.

3. The line laser scanning cigarette blister defect detection device according to claim 2, characterized in that, The central axis of the receiving groove (222) is parallel to the central axis of the detection wheel (22). The rotating component (30) is located on the side of the receiving groove (222). The suction head (31) has its adsorption surface facing the end face of the cigarette (51). The central axis of the output shaft of the rotating motor (32) is collinear with the central axis of the receiving groove (222) to drive the cigarette (51) located in the receiving groove (222) to rotate around its central axis.

4. The line laser scanning cigarette blister defect detection device according to claim 3, characterized in that, The two rotating components (30) are symmetrically arranged on both sides of the receiving groove (222), and the two rotating components (30) rotate the cigarette (51) in turn in an intermittent manner.

5. The line laser scanning cigarette blister defect detection device according to claim 1, characterized in that, The line laser device (11) and the camera (12) are respectively located at both ends of the adjusting rod (13). The adjusting rod (13) is mounted above the detection wheel (22) via a bracket (14). The middle part of the adjusting rod (13) is connected to the bracket (14).

6. The line laser scanning cigarette blister defect detection device according to claim 5, characterized in that, The adjusting rod (13) has opening slots (131) at both ends. The line laser device (11) and the camera (12) are rotatably disposed in the opening slots (131). The opening slots (131) are provided with locking holes (133). The locking holes (133) cooperate with bolts to adjust the opening size of the opening slots (131) so as to lock the opening slots (131) so as to hold the line laser device (11) and the camera (12).

7. The line laser scanning cigarette blister defect detection device according to claim 1, characterized in that, A plurality of the accommodating grooves (222) are evenly spaced on the circumferential surface of the detection wheel (22). The accommodating grooves (222) extend from the circumferential surface of the detection wheel (22) to the center of the detection wheel (22), and their extension direction is radially inclined relative to the detection wheel (22).

8. The line laser scanning cigarette blister defect detection device according to claim 7, characterized in that, The detection wheel (22) is connected to the drive motor (221), and the drive motor (221) drives the detection wheel (22) to rotate in the direction of the accommodating groove (222).

9. The line laser scanning cigarette blister defect detection device according to claim 8, characterized in that, The input belt (21) and the output belt (23) are located on the same side of the detection wheel (22). The input belt (21) is inclined downward to connect the smoke chamber (50) and the detection wheel (22). The output belt (23) is inclined downward to connect the detection wheel (22) and the flat conveyor belt (40).

10. The line laser scanning cigarette blister defect detection device according to claim 9, characterized in that, Both the input band (21) and the output band (23) are provided with evenly spaced partitions (211).

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