Method for detecting blemishes in cotton

Abstract

The application relates to the technical field of detection methods, and provides a cotton defect detection method, wherein the cotton defect detection method comprises a layering treatment, cotton samples are divided into at least two sub-sample layers, and the surfaces of any two adjacent sub-sample layers close to each other are detection surfaces; a detection treatment, image information of the detection surface of each sub-sample layer is collected, and the image information is analyzed and processed to count the types and quantities of defects on the detection surface of each sub-sample layer. Through the layering treatment of the cotton samples, the internal levels of the cotton samples can be exposed, so that the internal levels of the cotton samples can be taken as the detection surfaces for detection, the detection of the internal levels of the cotton samples is realized, the detection of the cotton samples is more sufficient in combination with the surface detection of the cotton samples, and the accuracy of the detection result is improved.

Description

Technical Field

[0001] This invention relates to the field of detection methods, and in particular to a method for detecting defects in cotton. Background Technology

[0002] Cotton, as a fundamental commodity in the cotton textile industry, relies heavily on precise testing and strict control of ginning quality in the production, processing, and inspection stages to maximize its value in the trade sector. Ginning quality is one of the most critical indicators in cotton quality inspection, significantly impacting the quality of yarn produced later. Ginning quality includes the smoothness of the lint's appearance after seed cotton processing and the types and quantities of defects (such as neps, fibrous strands, impurities, and abnormal short fiber content). Among these, the detection of the types and quantities of defects constitutes the core of the inspection work.

[0003] Currently, defect detection technologies in cotton ginning quality control are mainly divided into two categories: human sensory observation and machine vision and optical inspection technologies. Human sensory observation suffers from high labor intensity, strong subjectivity, and low efficiency. Machine vision and optical inspection technologies offer significant improvements in consistency and accuracy compared to traditional human sensory methods. However, both of these methods primarily focus on identifying defects on the surface of the cotton sample, without delving into its internal layers. Given the diversity of cotton samples, relying solely on surface defect detection has limitations, lacks necessary rigor, and leads to inaccurate defect detection results for cotton samples.

[0004] Therefore, how to solve the problem of inaccurate defect detection results for cotton samples in related technologies has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides a method for detecting defects in cotton, which solves the problem of inaccurate defect detection results for cotton samples in related technologies.

[0006] This invention provides a method for detecting defects in cotton, comprising:

[0007] Layered processing is used to divide the cotton sample into at least two sub-sample layers, and the surfaces of any two adjacent sub-sample layers that are close to each other are the surfaces to be tested.

[0008] The detection process involves acquiring image information of the surface to be inspected in each of the sub-sample layers, and analyzing the image information to statistically determine the types and quantities of defects on the surface to be inspected in each of the sub-sample layers.

[0009] According to a cotton defect detection method provided by the present invention, the layering process is performed on a support platform using a rolling element. The cotton sample is conveyed to the support platform by a conveyor belt mechanism. The rolling axis of the rolling element is parallel to the support platform and perpendicular to the conveying direction of the conveyor belt mechanism. Before the layering process, the method further includes:

[0010] The cotton sample is dispersed manually into a loose state and then placed on the conveyor belt mechanism.

[0011] According to a cotton defect detection method provided by the present invention, the rolling element is adapted to move up and down relative to the support platform, and is adapted to reciprocate above the conveyor belt mechanism and the support platform along the conveying direction of the conveyor belt mechanism. The layering process includes:

[0012] A first adhesive layer is provided on the rolling element, and a second adhesive layer is provided on the support platform.

[0013] The rolling element is moved above the conveyor belt mechanism, and the rolling element is pressed against the cotton sample on the conveyor belt mechanism;

[0014] The rolling element is rotated so that the cotton sample on the conveyor belt mechanism adheres to the first adhesive layer on the rolling element;

[0015] The rolling element is moved above the support platform and pressed against the second adhesive layer on the support platform.

[0016] The rolling element is rolled while simultaneously moving relative to the support platform to separate the cotton sample into a first sub-sample layer adhered to the first adhesive layer and a second sub-sample layer adhered to the second adhesive layer.

[0017] According to a cotton defect detection method provided by the present invention, the step of pressing the cotton sample, in which the rolling element is pressed against the conveyor belt mechanism, includes:

[0018] Detect the pressure of the rolling element on the conveyor belt mechanism;

[0019] Based on the pressure exerted by the rolling element on the conveyor belt mechanism, the rolling element is controlled to rise and fall until the pressure exerted by the rolling element on the conveyor belt mechanism is within a first preset pressure range;

[0020] The step of pressing the rolling element against the support platform with the second adhesive layer includes:

[0021] Detect the pressure of the rolling element on the support platform;

[0022] The rolling element is controlled to rise and fall according to the pressure of the rolling element on the support platform until the pressure of the rolling element on the support platform is within the second preset pressure range.

[0023] According to a cotton defect detection method provided by the present invention, at least one of the rolling element and the supporting platform is provided with a heating mechanism, and before the rolling element is rolled and simultaneously moved relative to the supporting platform, the method further includes:

[0024] The humidity of the cotton sample was measured;

[0025] The heating mechanism is controlled to start and stop based on the humidity of the cotton sample until the humidity of the cotton sample is less than the preset humidity.

[0026] According to a cotton defect detection method provided by the present invention, the layering process further includes:

[0027] Control the vibration of the support platform;

[0028] And / or, control the tilt angle of the support platform to a preset angle.

[0029] According to a cotton defect detection method provided by the present invention, prior to the detection process, the method further includes:

[0030] The removal process involves removing the first adhesive layer with the first sub-sample layer adhering to it from the rolling element, and removing the second adhesive layer with the second sub-sample layer adhering to it from the support platform.

[0031] The first and second subsample layers are laid flat on the testing platform, with the opposite side of the surface to be tested of each subsample layer in contact with the testing platform.

[0032] According to a cotton defect detection method provided by the present invention, at least one of the surface of the rolling element and the support platform is provided with a textured structure.

[0033] According to a cotton defect detection method provided by the present invention, in the detection process, at least two camera frames are used to collect the image information, and the shooting angles of each camera frame are different.

[0034] According to the cotton defect detection method provided by the present invention, the detection table is black in color and the reflectivity of the detection table is less than a preset value.

[0035] The cotton defect detection method provided by this invention includes layer processing and detection processing. Layer processing involves dividing the cotton sample into at least two sub-sample layers, with the surfaces of any two adjacent sub-sample layers serving as the surfaces to be inspected. Detection processing involves acquiring image information of the surfaces to be inspected in each sub-sample layer and analyzing the image information to statistically analyze the types and quantities of defects on the surfaces to be inspected in each sub-sample layer. This layering process exposes the internal layers of the cotton sample, making internal defects visible and allowing the internal layers to be used as the surfaces to be inspected, thus enabling the detection of the internal layers of the cotton sample. Combined with surface inspection of the cotton sample, the detection of the cotton sample is more thorough, the accuracy of the detection results is improved, and the problem of inaccurate defect detection results in related technologies is solved. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a flowchart of the cotton defect detection method provided by the present invention.

[0038] Figure 2 This is a schematic diagram showing the relative positions of the support platform and the rolling element during the cotton defect detection process provided by the present invention.

[0039] Figure 3 This is a schematic diagram of the structure of the rolling element provided by the present invention when it is set in a dual-axis slide mechanism.

[0040] Figure 4 This is a schematic diagram illustrating the adhesion effect of the first and second sample layers on the first and second adhesive layers provided by the present invention.

[0041] Figure label:

[0042] 1. Rolling element; 2. Supporting platform; 3. Conveyor belt mechanism; 4. First adhesive layer; 5. Second adhesive layer; 6. Camera mechanism; 7. Dual-axis slide mechanism. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0044] The following is combined with Figures 1 to 4 The present invention describes a cotton defect detection method.

[0045] like Figure 1 and Figure 4 As shown, the cotton defect detection method provided in this embodiment of the invention mainly includes the following steps 110 to 120.

[0046] Step 110: Layering process. Divide the cotton sample into at least two sub-sample layers. The surfaces of any two adjacent sub-sample layers that are close to each other are the surfaces to be tested.

[0047] Step 120: Detection and processing. Collect image information of the surface to be inspected in each sub-sample layer, and analyze and process the image information to count the types and quantities of defects on the surface to be inspected in each sub-sample layer.

[0048] Before the aforementioned layering process, the surface of the cotton sample can be inspected. Specifically, image information of the surface of the cotton sample can be collected, and by analyzing and processing this image information, the types and quantities of defects on the surface of the cotton sample can be counted.

[0049] After completing the surface inspection of the cotton sample, the cotton sample is then subjected to a layering process to expose the internal layers of the cotton sample and reveal the internal defects. Thus, the internal layers of the cotton sample can be used as the surface to be inspected, thereby achieving the detection of the internal layers of the cotton sample.

[0050] This setup, combining surface and internal layer detection of cotton samples, provides a more comprehensive assessment, improves the accuracy of the results, overcomes the limitations of surface detection, and solves the problem of inaccurate defect detection results for cotton samples in related technologies.

[0051] In this embodiment of the invention, the layering process is performed using a rolling element 1 on a support platform 2. The cotton sample can be conveyed to the support platform 2 by a conveyor belt mechanism 3. The rolling axis of the rolling element 1 is parallel to the support platform 2, and the rolling axis of the rolling element 1 is perpendicular to the conveying direction of the conveyor belt mechanism 3.

[0052] Before stratification, a dispersion process is required. This dispersion process involves manually breaking down the tightly packed cotton sample into a loose state, and then placing the loose cotton sample onto the conveyor belt mechanism 3.

[0053] Dispersion processing can spread out the cotton samples, preventing them from clumping together too tightly and thus avoiding any impact on subsequent stratification and detection processes.

[0054] The conveying speed of the conveyor belt mechanism 3 can be adjusted according to the size and shape of the cotton sample to ensure that the cotton sample can approach the rolling element 1 at a suitable speed.

[0055] In this embodiment, the rolling element 1 can be raised and lowered relative to the support platform 2, and the rolling element 1 can reciprocate above the conveyor belt mechanism 3 and the support platform 2 along the conveying direction of the conveyor belt mechanism 3.

[0056] During the layering process, a first adhesive layer 4 is applied to the rolling element 1, and a second adhesive layer 5 is applied to the support platform 2. The rolling element 1 is then raised to a certain height and moved above the conveyor belt mechanism 3. When the conveyor belt mechanism 3 has transported the cotton sample to a point where the end of the cotton sample is just below the rolling element 1, the rolling element 1 is lowered until it presses against the cotton sample on the conveyor belt mechanism 3.

[0057] It should be noted that when the conveyor belt mechanism 3 transports the cotton sample to the point where the end of the cotton sample is exactly below the rolling element 1, the conveyor belt mechanism 3 can be stopped first, and the rolling element 1 can be lowered until it presses against the cotton sample on the conveyor belt mechanism 3, and then the conveyor belt mechanism 3 can be started again.

[0058] After the rolling element 1 presses against the cotton sample on the conveyor belt mechanism 3, the rolling element 1 is rolled, so that the cotton sample on the conveyor belt mechanism 3 can adhere to the first adhesive layer 4 on the rolling element 1.

[0059] After the cotton sample adheres to the first adhesive layer 4 on the rolling element 1, the rolling element 1 is raised to a certain height and moved along the conveying direction of the conveyor belt mechanism 3 until the rolling element 1 is above the support platform 2.

[0060] After the rolling element 1 is positioned above the support platform 2, it is lowered until it presses against the second adhesive layer 5 on the support platform 2. Then, the rolling element 1 is rolled and moved relative to the support platform 2. When the cotton sample adhered to the rolling element 1 comes into contact with the second adhesive layer 5, it also adheres to the second adhesive layer 5 on the support platform 2. As the rolling element 1 rolls and moves, a tearing force is generated on the cotton sample, thereby tearing apart the portion adhered to the first adhesive layer 4 and the portion adhered to the second adhesive layer 5, thus completing the layering of the cotton sample. Both the portion adhered to the first adhesive layer 4 and the portion adhered to the second adhesive layer 5 are sub-sample layers, with the portion adhered to the first adhesive layer 4 being the first sub-sample layer and the portion adhered to the second adhesive layer 5 being the second sub-sample layer.

[0061] When controlling the rolling and moving of the rolling element 1, the rolling speed of the rolling element 1 needs to be matched with the moving speed to avoid stretching the cotton sample.

[0062] In some embodiments, the rolling element 1 can be configured as a roller with a circumferential length greater than the length of the cotton sample, and the first adhesive layer 4 can be fixed to the circumferential cylindrical surface of the roller.

[0063] In other embodiments, the rolling element 1 can be configured as a transmission belt, with two pulleys spaced apart. The transmission belt wraps around the outside of the two pulleys, and rolls around them when they rotate. The first adhesive layer 4 can be fixed to the outer surface of the transmission belt away from the pulleys. The transmission belt has a large circumferential length, which can accommodate cotton samples with large length dimensions.

[0064] The aforementioned transmission belt can be a toothed belt. Toothed belts can effectively avoid slippage, have high transmission efficiency, require no lubrication, have smoother tooth meshing, lower operating noise, and reduce maintenance requirements.

[0065] The dimensions of the rolling element 1 along its own rolling axis need to be consistent with the dimensions of the cotton sample along the rolling axis of the rolling element 1, so that the entire layer of the cotton sample can be displayed in one roll of the rolling element 1, which is beneficial to improving the layering efficiency.

[0066] When using the first adhesive layer 4 and the second adhesive layer 5 to separate the layers, the cotton sample is subjected to tearing force, which causes the cotton sample to be arranged perpendicular to the adhesive layer. In order to avoid the observation of defects, it is necessary to comb each sub-sample layer with a non-adhesive device before the detection and processing.

[0067] The first adhesive layer 4 and the second adhesive layer 5 mentioned above can be adhesive tape; or they can be layers of adhesive materials such as silicone or polyurethane with moderate and soft adhesion, which can adapt to cotton samples of different densities and shapes. Alternatively, the first adhesive layer 4 and the second adhesive layer 5 with appropriate adhesion can be selected as needed according to the density and shape of the cotton sample.

[0068] The cotton sample adhered to the rolling element 1 rolls once on the support platform 2, forming a subsample layer on a second adhesive layer 5. After removing the second adhesive layer 5 from the support platform 2, another second adhesive layer 5 can be applied to the support platform 2. Then, the rolling element 1 rolls once on this second adhesive layer 5 to form another subsample layer. This cycle can be repeated to form multiple subsample layers, thereby enabling the detection of multiple locations within the cotton sample.

[0069] A series of delamination experiments were conducted using adhesive tape as the first adhesive layer 4 and the second adhesive layer 5. The adhesion effects on the first adhesive layer 4 and the second adhesive layer 5 were as follows: Figure 4 As shown, defects such as fibrous strands and stiff flakes in the cotton sample can be observed, demonstrating that the viscous layering method provided in this embodiment of the invention is feasible and effective.

[0070] In this embodiment, when pressing the rolling element 1 onto the cotton sample on the conveyor belt mechanism 3, it is necessary to detect the pressure of the rolling element 1 on the conveyor belt mechanism 3. Based on the pressure of the rolling element 1 on the conveyor belt mechanism 3, the rolling element 1 is controlled to rise and fall until the pressure of the rolling element 1 on the conveyor belt mechanism 3 is within the first preset pressure range.

[0071] Similarly, when pressing the rolling element 1 onto the second adhesive layer 5 on the support platform 2, it is necessary to detect the pressure of the rolling element 1 on the support platform 2. Based on the pressure of the rolling element 1 on the support platform 2, the rolling element 1 is controlled to rise and fall until the pressure of the rolling element 1 on the support platform 2 is within the second preset pressure range.

[0072] This setting avoids excessive compression of the cotton sample and ensures that the cotton sample is not stretched or broken.

[0073] In a specific embodiment, a pressure sensor can be installed on the rolling element 1, or on the conveyor belt mechanism 3 and the support platform 2.

[0074] The rolling element 1 can move along the conveying direction of the conveyor belt mechanism 3 and can also be raised and lowered. In a specific embodiment, the rolling element 1 can be set on the dual-axis slide mechanism 7.

[0075] In this embodiment of the invention, at least one of the rolling element 1 and the support platform 2 is provided with a heating mechanism, which is capable of heating the cotton sample.

[0076] During the layering process, before rolling the roller 1 and moving it relative to the support platform 2, the humidity of the cotton sample can be detected. Then, based on the humidity of the cotton sample, the heating mechanism is controlled to start and stop until the humidity of the cotton sample is less than the preset humidity.

[0077] For cotton samples with a humidity level higher than the preset humidity, a heating device can be used to heat the cotton sample to reduce the humidity, increase the looseness of the cotton sample, reduce the difficulty of layering the cotton sample, and better display the internal layers of the cotton sample.

[0078] In this embodiment, during the layering process, the vibration of the support platform 2 can be controlled, or the tilt of the support platform 2 can be controlled at a preset angle. This setting can further promote the loosening and layering of the cotton sample, and ensure the stability and uniform distribution of the cotton sample on the support platform 2.

[0079] In this embodiment of the invention, prior to the laying process, a removal process and a laying process are included. The removal process involves removing the first adhesive layer 4, to which the first subsample layer is adhered, from the rolling element 1, and removing the second adhesive layer 5, to which the second subsample layer is adhered, from the support platform 2. The laying process involves laying the first and second subsample layers flat on the testing platform, with the opposite sides of the subsample layers to be tested in contact with the testing platform.

[0080] After removing the first adhesive layer 4 and the second adhesive layer 5, lay them flat on the detection platform. Acquiring image information after laying the first adhesive layer 4 and the second adhesive layer 5 flat improves the clarity of the image information and the accuracy of the detection results.

[0081] Each time a layering process is performed, the first adhesive layer 4 and the second adhesive layer 5 need to be reapplied on the rolling element 1 and the support platform 2.

[0082] In this embodiment, at least one of the surfaces of the rolling element 1 and the support platform 2 is provided with a textured structure. The micro-textured structure can help the cotton sample to be loose and spread evenly during the process of the cotton sample adhering to the first adhesive layer 4, and avoid the cotton sample being over-compressed.

[0083] The texture structure described above can be a tiny raised or recessed texture, a tiny grid-like structure, or a dotted structure. The size and spacing of the texture can be adjusted according to the clumping characteristics of the cotton sample.

[0084] In this embodiment, during the detection process, at least two camera arrays 6 are used to acquire image information, with each camera array 6 shooting from a different angle. By having each camera array 6 capture images of the surface to be inspected from different angles, comprehensive inspection of the surface can be ensured.

[0085] The aforementioned camera device 6 can be, but is not limited to, an industrial camera. Electrically connecting the industrial camera to a computer allows the image information captured by the camera to be uploaded to the computer for analysis and processing. This enables the quality assessment of the rolling process in off-site environments or laboratory conditions, significantly improving operational flexibility and adaptability.

[0086] When acquiring image information, a light source close to natural light can be selected as the light source. To avoid interference with the detection results caused by reflections generated by the interaction between the light source and the first adhesive layer 4 and the second adhesive layer 5, the height of the light source can be adjusted appropriately or a polarizing filter can be added to the camera mechanism 6 to reduce reflections.

[0087] A combination of directional and uniform light sources can be used to ensure that the cotton sample is illuminated evenly and the details are clear during the shooting process.

[0088] In this embodiment, the color of the detection stage can be set to black to increase the contrast between the sample layer and the detection stage. The reflectivity of the detection stage is also set to be less than a preset value to ensure the clarity of the image information.

[0089] In some embodiments, the detection platform is configured with a height-adjustable structure. During the detection process, by adjusting the height of the detection platform, the distance between the camera module 6 and the detection platform can be adjusted to improve the clarity of the captured image information.

[0090] In some embodiments, the detection platform is configured with an adjustable tilt angle. During the detection process, the tilt angle of the detection platform is adjusted to adjust the display angle of the cotton sample and avoid the overlapping of sub-sample layers.

[0091] In summary, the cotton defect detection method provided by the embodiments of the present invention effectively ensures efficient processing and accurate detection of cotton samples through manual preliminary dispersion, the dispersion effect of the rolling element, the stable layering of the rolling element 1 and the support platform 2, and the image acquisition of the sub-sample layers by the camera mechanism 6, especially for the identification and classification of defects inside the lint.

[0092] 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 method for detecting defects in cotton, characterized in that, include: Layered processing is used to divide the cotton sample into at least two sub-sample layers, and the surfaces of any two adjacent sub-sample layers that are close to each other are the surfaces to be tested. The detection process involves acquiring image information of the surface to be inspected in each of the sub-sample layers, and analyzing the image information to statistically determine the types and quantities of defects on the surface to be inspected in each of the sub-sample layers. The layering process is performed on a support platform (2) using a rolling element (1). A first adhesive layer (4) is provided on the rolling element (1), and a second adhesive layer (5) is provided on the support platform (2). The cotton sample is conveyed to the support platform (2) by a conveyor belt mechanism (3). The rolling axis of the rolling element (1) is parallel to the support platform (2), and the rolling axis of the rolling element (1) is perpendicular to the conveying direction of the conveyor belt mechanism (3). Before the layering process, the following steps are also included: Dispersion processing: The cotton sample in a compact state is manually dispersed into a loose state, and the loose cotton sample is placed on the conveyor belt mechanism (3).

2. The cotton defect detection method according to claim 1, characterized in that, The rolling element (1) is adapted to move up and down relative to the support platform (2), and is adapted to reciprocate above the conveyor belt mechanism (3) and the support platform (2) along the conveying direction of the conveyor belt mechanism (3). The layering process includes: Move the rolling element (1) above the conveyor belt mechanism (3) and press the rolling element (1) against the cotton sample on the conveyor belt mechanism (3); The rolling element (1) is rolled so that the cotton sample on the conveyor belt mechanism (3) adheres to the first adhesive layer (4) on the rolling element (1). Move the rolling element (1) above the support platform (2) and press the rolling element (1) against the second adhesive layer (5) on the support platform (2); The rolling element (1) is rolled while the rolling element (1) is moved relative to the support platform (2) to separate the cotton sample into a first sub-sample layer adhered to the first adhesive layer (4) and a second sub-sample layer adhered to the second adhesive layer (5).

3. The cotton defect detection method according to claim 2, characterized in that, The cotton sample that presses the rolling element (1) onto the conveyor belt mechanism (3) includes: Detect the pressure of the rolling element (1) on the conveyor belt mechanism (3); Based on the pressure of the rolling element (1) on the conveyor belt mechanism (3), the rolling element (1) is controlled to rise and fall until the pressure of the rolling element (1) on the conveyor belt mechanism (3) is within the first preset pressure range; The second adhesive layer (5) that presses the rolling element (1) onto the support platform (2) includes: Detect the pressure of the rolling element (1) on the support platform (2); Based on the pressure of the rolling element (1) on the support platform (2), the rolling element (1) is controlled to rise and fall until the pressure of the rolling element (1) on the support platform (2) is within the second preset pressure range.

4. The cotton defect detection method according to claim 2, characterized in that, At least one of the rolling element (1) and the supporting platform (2) is provided with a heating mechanism. Before the rolling element (1) is rolled and the rolling element (1) is moved relative to the supporting platform (2), the heating mechanism is further provided as follows: The humidity of the cotton sample was measured; The heating mechanism is controlled to start and stop based on the humidity of the cotton sample until the humidity of the cotton sample is less than the preset humidity.

5. The cotton defect detection method according to claim 2, characterized in that, The layered processing further includes: Control the vibration of the support platform (2); And / or, control the tilt of the support platform (2) at a preset angle.

6. The cotton defect detection method according to claim 2, characterized in that, Prior to the detection process, the following is also included: The removal process involves removing the first adhesive layer (4) with the first sub-sample layer adhered to from the rolling element (1) and removing the second adhesive layer (5) with the second sub-sample layer adhered to from the support platform (2). The first and second subsample layers are laid flat on the testing platform, with the opposite side of the surface to be tested of each subsample layer in contact with the testing platform.

7. The cotton defect detection method according to claim 1, characterized in that, At least one of the surface of the rolling element (1) and the support platform (2) is provided with a textured structure.

8. The cotton defect detection method according to claim 1, characterized in that, In the detection process, at least two camera units (6) are used to collect the image information, and the shooting angles of each camera unit (6) are different.

9. The cotton defect detection method according to claim 6, characterized in that, The detection platform is black in color, and its reflectivity is less than a preset value.

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