Cigarette paper appearance detection system

Abstract

The invention discloses a cigarette paper appearance detection system, which comprises a motion assembly, a visual assembly and a support connection assembly, and is characterized in that the motion assembly comprises a rotary table servo motor, a hollow speed reducer, a rotary table disc, an X-axis servo motor, an X linear moving shaft, a Y-axis servo motor, a Y linear moving shaft, a Z-axis servo motor and a Z linear moving shaft; the visual assembly comprises a global camera, a global lens, an area light source, a telecentric camera, a telecentric lens and a coaxial light source. The supporting and connecting assembly comprises a structural bottom plate, an X-axis bottom plate, a global camera supporting column, a Z-axis connecting piece, a Y-axis supporting column and the like. According to the method, detection of overall information and local details of the appearance of the cigarette paper is effectively considered, and the automatic detection level of the appearance of the cigarette paper is improved.

Description

Technical Field

[0001] This invention relates to the field of paper appearance inspection, and in particular to a system for inspecting the appearance of cigarette paper. Background Technology

[0002] As a key material in cigarette production, the appearance quality of cigarette paper directly affects the sensory quality of the cigarette product. Cigarette paper comes in various types, and its appearance quality inspection involves both measuring overall dimensions and acquiring detailed information at different locations to be inspected. Based on the obtained overall information and detailed information, it is compared with a corresponding reference template of cigarette paper to identify defects.

[0003] Traditional inspection methods rely primarily on manual visual inspection, which suffers from low efficiency, high subjectivity, and a high rate of missed detections. With the development of machine vision, some studies have attempted to use automation technology to assist manual inspection, but current methods still face the challenge of simultaneously assessing both global information and local details in cigarette paper appearance inspection. Therefore, designing a cigarette paper appearance inspection system that can simultaneously detect both global information and local details requires further research. Summary of the Invention

[0004] In order to solve the above-mentioned problems in the prior art, namely the problem that the appearance inspection of cigarette paper cannot take into account both global information and local details, the present invention provides a cigarette paper appearance inspection system.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: A cigarette paper appearance inspection system includes a motion component, a vision component, and a support connection component; The motion assembly includes a turntable servo motor, a hollow reducer, a turntable disk, an X-axis linear motion axis, a Y-axis linear motion axis, and a Z-axis linear motion axis. The turntable servo motor and the turntable disk are both fixed to the hollow reducer. The turntable disk carries the cigarette paper to be tested. The turntable servo motor drives the hollow reducer to rotate, thereby rotating the turntable disk to adjust the posture of the cigarette paper on it. The hollow reducer is fixed to the X-axis linear motion axis and moves with it. The Y-axis and Z-axis linear motion axes are used for the position movement of the telecentric camera. The vision component includes a global camera, a global lens, a telecentric camera, a telecentric lens, and a coaxial light source; wherein the global camera is fixed on the support connection component, the global lens is fixed on the global camera, and is used to capture a complete image of the cigarette paper to be inspected; the telecentric camera and the coaxial light source are fixed on the Z linear motion axis, and the telecentric lens is fixed on the telecentric camera, and is used to acquire a high-definition detailed image of a local part of the cigarette paper to be inspected. The supporting connection assembly includes a structural base plate, an X-axis base plate, a first fixing member, a global camera support column, a first light source-camera connector, a Y-axis base plate, a Z-axis connector, a second light source-camera connector, and a Y-axis support column. The global camera support column is vertically fixed to the structural base plate via the first fixing member. The first light source-camera connector is fixed to the global camera support column. The global camera is fixed to the first light source-camera connector. The X-axis base plate is fixed to the structural base plate and is used to fix the X-axis linear motion axis. The Y-axis base plate is fixed to the structural base plate via the Y-axis support column and is used to fix the Y-axis linear motion axis. The Z-axis linear motion axis is fixed to the Y-axis linear motion axis via the Z-axis connector. The telecentric camera and the coaxial light source are fixed to the Z-axis linear motion axis via the second light source-camera connector.

[0006] As an improvement to the above technical solution, the motion component further includes an X-axis servo motor, a Y-axis servo motor, and a Z-axis servo motor; wherein the X-axis servo motor is mounted on the X linear motion axis and is used to drive it to reciprocate along the X direction; the Y-axis servo motor is mounted on the Y linear motion axis and is used to drive it to reciprocate along the Y direction; the Z linear motion axis is fixed on the Y linear motion axis and moves with it; and the Z-axis servo motor is mounted on the Z linear motion axis and is used to drive it to reciprocate along the Z direction.

[0007] As an improvement to the above technical solution, the vision component further includes a surface light source; wherein the surface light source is fixed on the support connection component and is used for lighting when the global camera takes pictures, and its light-emitting surface is set vertically downward.

[0008] As an improvement to the above technical solution, the support connection assembly further includes an X-axis base plate support column and a second fixing member; wherein the X-axis base plate is fixed to the structural base plate by the X-axis base plate support column, and the Y-axis support column is fixed to the structural base plate by the second fixing member.

[0009] As an improvement to the above technical solution, the supporting connection assembly further includes a base, a transition flange, a turntable fixing component, a first cable tray, a second cable tray, and a third cable tray; wherein the base is fixed to the bottom of the structural base plate to support the structural base plate, the first light source-camera connector is fixed to the global camera support column through the transition flange, the hollow reducer is fixed to the X-axis linear motion via the turntable fixing component, and the connection between the first cable tray and the second light source-camera connector, the connection between the second cable tray and the Z-axis connector, and the connection between the third cable tray and the turntable fixing component are all used for wiring.

[0010] As an improvement to the above technical solution, the cigarette paper to be tested is placed on a turntable disk. A complete image of the cigarette paper to be tested is captured by a global camera and a global lens, and global information detection is performed to obtain the deflection angle of the cigarette paper to be tested relative to the X direction. The turntable servo motor is controlled to rotate a corresponding number of revolutions, driving the hollow reducer to rotate, so that the turntable disk rotates until the deflection angle of the cigarette paper to be tested relative to the X direction is 0.

[0011] As an improvement to the above technical solution, a local high-resolution image of a specified location on the cigarette paper to be inspected is obtained: The deviation of the specified inspection position from the center of the turntable disk in the X direction and the deviation of the center of the turntable disk from the optical axis of the telecentric camera in the X direction are obtained to obtain the X-axis movement of the specified inspection position in the X direction. Based on this, the X-axis servo motor is controlled to rotate a corresponding number of revolutions, driving the X linear movement axis to move until the deviation of the specified inspection position from the optical axis of the telecentric camera in the X direction is 0. The deviation in the Y direction between the specified inspection position and the center of the turntable disk, and the deviation in the Y direction between the center of the turntable disk and the optical axis of the telecentric camera are obtained. The Y-axis movement of the specified inspection position in the Y direction is obtained. Based on this, the Y-axis servo motor is controlled to rotate a corresponding number of revolutions, driving the Y linear movement axis to move until the deviation in the Y direction between the specified inspection position and the optical axis of the telecentric camera is 0. The image sharpness of the image captured by the telecentric camera is evaluated. Based on the image sharpness evaluation result, the Z-axis servo motor is controlled to drive the Z-axis linear movement, and the position of the telecentric camera on the Z-axis is adjusted until the image sharpness captured by the telecentric camera meets the requirements, thereby obtaining a local high-definition image of the specified inspection location on the cigarette paper to be inspected.

[0012] As an improvement to the above technical solution, to achieve defect detection in the local high-definition image: The local high-resolution image of the specified inspection location and the local reference image of the cigarette paper reference template at the corresponding location are obtained by the absdiff algorithm to obtain a difference map. Then, the difference map is binarized and segmented by the threshold algorithm. The number of 1s in the binarization segmentation result is combined with a threshold to determine whether there is a defect at the specified inspection location. The 1s in the binarization segmentation result indicate that there is a difference. The process involves sequentially traversing all designated locations on the cigarette paper to be inspected until all designated locations on the cigarette paper have been inspected for defects.

[0013] The beneficial effects of this invention are as follows: The cigarette paper appearance inspection system provided by this invention effectively solves the problems of low efficiency, strong subjectivity, and high false negative rate caused by the reliance on manual inspection of cigarette paper appearance, as well as the problem that existing automated auxiliary inspection schemes cannot take into account both global information and local detail inspection. It has significant technical advantages and practical value. Firstly, this system, through the coordinated operation of motion components, vision components, and support connection components, takes into account both the detection of global information and local details of the appearance of cigarette paper. The vision component is equipped with a global camera and a telecentric camera, and with targeted supplementary lighting from surface light sources and coaxial light sources, it can acquire the overall size of the cigarette paper through the global camera, and also acquire high-definition detailed images of designated inspection locations through the telecentric camera, thereby improving the level of automatic detection of the appearance of cigarette paper.

[0014] Secondly, by integrating image processing algorithms, this system effectively reduces subjective judgment errors and false negative rates, thereby improving the quality of appearance inspection of cigarette paper. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view of a cigarette paper appearance inspection system; Figure 2 This is an axonometric view of a cigarette paper appearance inspection system.

[0017] Legend: 1. Turntable servo motor; 2. X-axis servo motor; 3. Y-axis servo motor; 4. Z-axis servo motor; 5. Hollow reducer; 6. Turntable disk; 7. X-axis linear motion axis; 8. Y-axis linear motion axis; 9. Z-axis linear motion axis; 10. Telecentric camera; 11. Telecentric lens; 12. Coaxial light source; 13. Global camera; 14. Global lens; 15. Area light source; 16. Foot; 17. Structural base plate; 18. X-axis base plate support column; 19. X-axis base plate; 20. Turntable fixing component; 21. First fixing component; 22. Global camera support column; 23. Adapter flange; 24. First light source-camera connector; 25. Y-axis base plate; 26. Z-axis connector; 27. Second light source-camera connector; 28. Y-axis support column; 29. ​​Second fixing component; 30. First groove; 31. Second groove; 32. Third groove. Detailed Implementation

[0018] 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, and 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.

[0019] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0021] This invention relates to an appearance inspection system for cigarette paper, comprising a motion component, a vision component, and a support connection component. The following describes the system in conjunction with... Figure 1 and Figure 2 Please provide a detailed explanation.

[0022] The motion components include a turntable servo motor 1, a hollow reducer 5, a turntable disk 6, an X-axis servo motor 2, an X-axis linear motion axis 7, a Y-axis servo motor 3, a Y-axis linear motion axis 8, a Z-axis servo motor 4, and a Z-axis linear motion axis 9.

[0023] The motion components are used for carrying, adjusting the posture of, and conveying the cigarette paper to be inspected, and also for conveying the telecentric camera 10 to the designated inspection position. Specifically, the turntable servo motor 1 and the turntable disk 6 are both fixed to the hollow reducer 5. The turntable disk 6 carries the cigarette paper to be inspected, and the turntable servo motor 1 drives the hollow reducer 5 to rotate, thereby rotating the turntable disk 6 to adjust the posture of the cigarette paper to be inspected. The hollow reducer 5 is fixed to the X-axis linear motion axis 7 and moves with it. The X-axis servo motor 2 is mounted on the X-axis linear motion axis 7 and drives it to reciprocate along the X direction. The Y-axis servo motor 3, Y-axis linear motion axis 8, Z-axis servo motor 4, and Z-axis linear motion axis 9 are used for the position movement of the telecentric camera 10. The Y-axis servo motor 3 is mounted on the Y linear motion axis 8 to drive it to reciprocate along the Y direction. The Z linear motion axis 9 is also fixed on the Y linear motion axis 8 and moves with it. The Z-axis servo motor 4 is mounted on the Z linear motion axis 9 to drive it to reciprocate along the Z direction.

[0024] The vision components include a global camera 13, a global lens 14, a surface light source 15, a telecentric camera 10, a telecentric lens 11, and a coaxial light source 12.

[0025] The vision component is used to acquire image data of the cigarette paper to be inspected. The global camera 13 and the surface light source 15 are both fixed to the supporting connection assembly. The global lens 14 is fixed to the global camera 13 and is used to capture a complete image of the cigarette paper to be inspected, obtaining information on its overall size and placement posture (e.g., tilt angle). The surface light source 15 is used to illuminate the global camera 13 during shooting, with its emitting surface vertically downwards. The telecentric camera 10 and the coaxial light source 12 are fixed to the Z-axis linear motion 9. The telecentric lens 11 is fixed to the telecentric camera 10 and is used to acquire high-definition detailed images of local areas of the cigarette paper to be inspected.

[0026] The supporting connection assembly includes a base plate 16, a structural base plate 17, an X-axis base plate support column 18, an X-axis base plate 19, a turntable fixing component 20, a first fixing component 21, a global camera support column 22, an adapter flange 23, a first light source-camera connector 24, a Y-axis base plate 25, a Z-axis connector 26, a second light source-camera connector 27, a Y-axis support column 28, a second fixing component 29, a first cable groove 30, a second cable groove 31, and a third cable groove 32.

[0027] The supporting connection assembly is mainly used to support the motion component and the vision component. The foot 16 is fixed to the bottom of the structural base plate 17 to support the structural base plate 17. The global camera support column 22 is vertically fixed to the structural base plate 17 by the first fixing member 21. The first light source-camera connector 24 is fixed to the global camera support column 22 by the adapter flange 23. The global camera 13 and the surface light source 15 are fixed to the first light source-camera connector 24. The X-axis base plate 19 is fixed to the structural base plate 17 by the X-axis base plate support column 18. The X-axis linear motion axis 7 is fixed to the X-axis base plate 19. The hollow reducer 5 is fixed to the X-axis linear motion axis 7 by the turntable fixing member 20. The Y-axis support column 28 is fixed to the structural base plate 17 by the second fixing member 29. The Y-axis base plate 25 is fixed to the Y-axis support column 28. The Y-axis base plate 25 is used to fix the Y-axis linear motion axis 8. The Z-axis linear motion axis 9 is fixed to the Y-axis linear motion axis 8 by the Z-axis connector 26. The telecentric camera 10 and the coaxial light source 12 are fixed to the Z-axis linear movement 9 via the second light source-camera connector 27. The first cable groove 30 is connected to the second light source-camera connector 27, the second cable groove 31 is connected to the Z-axis connector 26, and the third cable groove 32 is connected to the turntable fixing member 20, all for cable routing.

[0028] Based on the cigarette paper appearance inspection system described in the above embodiments, when it is necessary to perform cigarette paper appearance inspection: On a reference template for cigarette paper, a location that may have defects is manually selected as a manually designated location. This manually designated location may be one or more.

[0029] The cigarette paper to be tested is placed on the turntable disk 6 and illuminated by the surface light source 15. A complete image of the cigarette paper is captured by the global camera 13 and the global lens 14, and global information detection is performed. This embodiment uses the following method to achieve global information detection: First, the acquired complete image is denoised using the GaussianBlur algorithm from the OpenCV library and then subjected to Otsu adaptive thresholding to extract the binary connected component contour of the cigarette paper to be tested. Then, the minAreaRect algorithm from the OpenCV library is called to fit the contour to a minimum bounding rectangle, calculating the pixel dimensions of the length and width of the minimum bounding rectangle and its deflection angle relative to the X direction. The pixel dimensions of the length and width of the minimum bounding rectangle are converted into physical dimensions using a pre-calibrated pixel equivalent. The difference between the physical dimensions of the length and width of the minimum bounding rectangle and the physical dimensions of the length and width of the cigarette paper reference template is calculated, and a threshold is used to determine whether there are defects in the overall dimensions. Next, based on the deflection angle of the minimum circumscribed rectangle relative to the X direction, the turntable servo motor 1 is controlled to rotate a corresponding number of revolutions, driving the hollow reducer 5 to rotate, so that the turntable disk 6 rotates until the deflection angle of the minimum circumscribed rectangle relative to the X direction is 0.

[0030] For each manually designated position on the cigarette paper reference template, the corresponding position on the cigarette paper to be inspected is taken as the designated inspection position. Taking a designated inspection position on the cigarette paper to be inspected as an example, the deviation of the designated inspection position from the center of the turntable disk 6 in the X direction and the deviation of the center of the turntable disk 6 from the optical axis of the telecentric camera 10 in the X direction are obtained. The X-axis movement of the designated inspection position in the X direction is calculated. Based on this, the X-axis servo motor 2 is controlled to rotate a corresponding number of revolutions, driving the X linear movement axis 7 to move until the deviation of the designated inspection position from the optical axis of the telecentric camera 10 in the X direction is 0. Further, the deviation of the designated inspection position from the center of the turntable disk 6 in the Y direction and the deviation of the center of the turntable disk 6 from the optical axis of the telecentric camera 10 in the Y direction are obtained. The designated inspection position is then calculated. The amount of Y-axis movement in the Y direction is used to control the Y-axis servo motor 3 to rotate a corresponding number of revolutions, driving the Y linear movement axis 8 to move until the deviation between the specified inspection position and the optical axis of the telecentric camera 10 in the Y direction is 0. Then, the image sharpness of the image captured by the telecentric camera 10 is evaluated using the QualityBRISQUE algorithm in the OpenCV library. Based on the image sharpness evaluation result, the Z-axis servo motor 4 is controlled to drive the Z linear movement axis 9 to move, adjusting the position of the telecentric camera 10 on the Z axis until the image sharpness captured by the telecentric camera 10 meets the requirements, thereby obtaining a local high-definition detail image of the specified inspection position on the cigarette paper to be inspected. This embodiment employs the following method to achieve defect detection in the local high-resolution image: The local high-resolution image of the specified inspection location and the local reference image of the cigarette paper reference template at the corresponding location are input into the absdiff algorithm in the OpenCV library to obtain a difference image. Then, the threshold algorithm in the OpenCV library is used to perform binarization segmentation on the difference image. The number of 1s in the binarization segmentation result, combined with a threshold, is used to determine whether a defect exists at the specified inspection location. Here, 1s in the binarization segmentation result indicate the presence of a difference. Based on the above control process and principle, all specified inspection locations on the cigarette paper to be inspected are sequentially traversed until defect detection is completed at all specified inspection locations on the cigarette paper.

[0031] Finally, the X-axis servo motor 2 drives the X-axis linear motion axis 7 to move, so that the turntable disk 6 returns to the starting position.

[0032] To more fully illustrate the technical solution of this invention and facilitate accurate implementation by those skilled in the art, the following will describe, in conjunction with specific component model parameters, the structural composition and connection relationship of the cigarette paper appearance inspection system described in the foregoing embodiments, as follows: Figure 1 , Figure 2The diagram shows an appearance inspection device for cigarette paper. Specifically, except for the first groove 30, the second groove 31, and the third groove 32, which are made of plastic, the remaining supporting and connecting components are all made of aluminum alloy. The global camera 13 is a Hikvision MV-CH120-20UC, the global lens 14 is a Hikvision MVL-KF1224M-25MP, and the surface light source is a SLIDE SL-400-7024. The telecentric camera 10 is a Hikvision MV-CS050-10UC, the telecentric lens 11 is a Hikvision MVL-MBT-0271-118, and the coaxial light source 12 is a Hikvision MV-LCDS-H-60-60-W. The turntable servo motor 1 is a Delta ECM-B3L-C20401SS1, the hollow reducer 5 is a YXRA100-40SV, and the turntable disk 6 is made of aluminum alloy. The X-axis servo motor 2 is a Delta ECM-E3M-C20604RSE, and the X-axis linear motion axis 7 is a TOYO GTH8-L10-850-BL-T40-C4; the Y-axis servo motor 3 is a Delta ECM-E3M-C20604RSE, and the Y-axis linear motion axis 8 is a TOYO GTH8-L10-400-BL-T40-C4; the Z-axis servo motor 4 is a Delta ECM-B3L-C20401SS1, and the Z-axis linear motion axis 9 is a TOYO GTH5-L5-100-BL-T10-C4. By assembling the various parts according to the structural composition and connection relationships described in the aforementioned embodiment, a physical prototype of a cigarette paper appearance inspection device is obtained.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. 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. Such 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, and should all be included within the protection scope of the present invention.

Claims

1. A system for inspecting the appearance of cigarette paper, characterized in that: Includes motion components, vision components, and support connection components; The motion assembly includes a turntable servo motor, a hollow reducer, a turntable disk, an X-axis linear motion axis, a Y-axis linear motion axis, and a Z-axis linear motion axis. The turntable servo motor and the turntable disk are both fixed to the hollow reducer. The turntable disk carries the cigarette paper to be tested. The turntable servo motor drives the hollow reducer to rotate, thereby rotating the turntable disk to adjust the posture of the cigarette paper on it. The hollow reducer is fixed to the X-axis linear motion axis and moves with it. The Y-axis and Z-axis linear motion axes are used for the position movement of the telecentric camera. The vision component includes a global camera, a global lens, a telecentric camera, a telecentric lens, and a coaxial light source; wherein the global camera is fixed on the support connection component, the global lens is fixed on the global camera, and is used to capture a complete image of the cigarette paper to be inspected; the telecentric camera and the coaxial light source are fixed on the Z linear motion axis, and the telecentric lens is fixed on the telecentric camera, and is used to acquire a high-definition detailed image of a local part of the cigarette paper to be inspected. The supporting connection assembly includes a structural base plate, an X-axis base plate, a first fixing member, a global camera support column, a first light source-camera connector, a Y-axis base plate, a Z-axis connector, a second light source-camera connector, and a Y-axis support column. The global camera support column is vertically fixed to the structural base plate via the first fixing member. The first light source-camera connector is fixed to the global camera support column. The global camera is fixed to the first light source-camera connector. The X-axis base plate is fixed to the structural base plate and is used to fix the X-axis linear motion axis. The Y-axis base plate is fixed to the structural base plate via the Y-axis support column and is used to fix the Y-axis linear motion axis. The Z-axis linear motion axis is fixed to the Y-axis linear motion axis via the Z-axis connector. The telecentric camera and the coaxial light source are fixed to the Z-axis linear motion axis via the second light source-camera connector.

2. The appearance inspection system for cigarette paper according to claim 1, characterized in that: The motion assembly further includes an X-axis servo motor, a Y-axis servo motor, and a Z-axis servo motor; wherein the X-axis servo motor is mounted on the X linear motion axis and is used to drive it to reciprocate along the X direction; the Y-axis servo motor is mounted on the Y linear motion axis and is used to drive it to reciprocate along the Y direction; the Z linear motion axis is fixed on the Y linear motion axis and moves with it; and the Z-axis servo motor is mounted on the Z linear motion axis and is used to drive it to reciprocate along the Z direction.

3. The appearance inspection system for cigarette paper according to claim 1, characterized in that: The vision component also includes a surface light source; wherein the surface light source is fixed on the support connection component and is used for lighting when the global camera takes pictures, and its light-emitting surface is set vertically downward.

4. The appearance inspection system for cigarette paper according to claim 1, characterized in that: The support connection assembly further includes an X-axis base plate support column and a second fixing member; wherein the X-axis base plate is fixed to the structural base plate by the X-axis base plate support column, and the Y-axis support column is fixed to the structural base plate by the second fixing member.

5. The appearance inspection system for cigarette paper according to claim 1, characterized in that: The supporting connection assembly also includes a base, a transition flange, a turntable fixing component, a first cable tray, a second cable tray, and a third cable tray; wherein the base is fixed to the bottom of the structural base plate to support the structural base plate, the first light source-camera connector is fixed to the global camera support column through the transition flange, the hollow reducer is fixed to the X-axis linear motion axis through the turntable fixing component, and the connection between the first cable tray and the second light source-camera connector, the connection between the second cable tray and the Z-axis connector, and the connection between the third cable tray and the turntable fixing component are all used for wiring.

6. The appearance inspection system for cigarette paper according to claim 1, characterized in that: The cigarette paper to be tested is placed on a turntable disk. A complete image of the cigarette paper to be tested is captured by a global camera and a global lens, and global information detection is performed to obtain the deflection angle of the cigarette paper to be tested relative to the X direction. The turntable servo motor is controlled to rotate a corresponding number of revolutions, driving the hollow reducer to rotate, so that the turntable disk rotates until the deflection angle of the cigarette paper to be tested relative to the X direction is 0.

7. The appearance inspection system for cigarette paper according to claim 2, characterized in that: To obtain a high-resolution local image of a specific location on the cigarette paper to be inspected: The deviation of the specified inspection position from the center of the turntable disk in the X direction and the deviation of the center of the turntable disk from the optical axis of the telecentric camera in the X direction are obtained to obtain the X-axis movement of the specified inspection position in the X direction. Based on this, the X-axis servo motor is controlled to rotate a corresponding number of revolutions, driving the X linear movement axis to move until the deviation of the specified inspection position from the optical axis of the telecentric camera in the X direction is 0. The deviation in the Y direction between the specified inspection position and the center of the turntable disk, and the deviation in the Y direction between the center of the turntable disk and the optical axis of the telecentric camera are obtained. The Y-axis movement of the specified inspection position in the Y direction is obtained. Based on this, the Y-axis servo motor is controlled to rotate a corresponding number of revolutions, driving the Y linear movement axis to move until the deviation in the Y direction between the specified inspection position and the optical axis of the telecentric camera is 0. The image sharpness of the image captured by the telecentric camera is evaluated. Based on the image sharpness evaluation result, the Z-axis servo motor is controlled to drive the Z-axis linear movement, and the position of the telecentric camera on the Z-axis is adjusted until the image sharpness captured by the telecentric camera meets the requirements, thereby obtaining a local high-definition image of the specified inspection location on the cigarette paper to be inspected.

8. The appearance inspection system for cigarette paper according to claim 7, characterized in that: To achieve defect detection in the aforementioned local high-resolution image: The local high-resolution image of the specified inspection location and the local reference image of the cigarette paper reference template at the corresponding location are obtained by the absdiff algorithm to obtain a difference map. Then, the difference map is binarized and segmented by the threshold algorithm. The number of 1s in the binarization segmentation result is combined with a threshold to determine whether there is a defect at the specified inspection location. The 1s in the binarization segmentation result indicate that there is a difference. The process involves sequentially traversing all designated locations on the cigarette paper to be inspected until all designated locations on the cigarette paper have been inspected for defects.

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