A two-dimensional surface area-based raw cotton impurity detection device

Abstract

The utility model belongs to raw cotton impurity detection technical field discloses a raw cotton impurity detection device based on two -dimensional surface domain, contains raw cotton pretreatment mechanism, and it contains cotton feeding mechanism and opening mechanism, and cotton feeding mechanism is located in the front end of opening mechanism to deliver the cotton layer after even paving to opening mechanism, and opening mechanism is used to carry out the opening processing to the cotton layer, still contains two -dimensional surface domain image acquisition unit, and it contains cotton layer clamping mechanism and image acquisition mechanism, and cotton layer clamping mechanism is used to construct two -dimensional surface domain for the cotton layer after opening, while, the visible light source is equipped on this cotton layer clamping mechanism to provide perspective light to the two -dimensional surface domain of cotton layer and then project the cotton layer internal impurity image in two -dimensional surface domain, and image acquisition mechanism sets up in one side of cotton layer clamping mechanism to acquire the perspective image of cotton layer in two -dimensional surface domain, the deficiency that the existing visible light detection cannot identify raw cotton internal impurity is solved, and also provides new method for cotton internal impurity on -line collection and detection.

Description

Technical Field

[0001] This utility model belongs to the field of raw cotton impurity detection technology, and in particular relates to a raw cotton impurity detection device based on a two-dimensional surface domain. Background Technology

[0002] During planting, harvesting, transportation, and initial processing, cotton inevitably becomes contaminated with various impurities and foreign objects, such as short fibers, seed fragments, leaves, sand, metal shavings, and plastic film. If a significant amount of impurities remain inside the cotton, it will not only affect the smooth operation of subsequent textile processes but also reduce the quality of yarn, fabric, and final products, and may even lead to wear and damage to production equipment. Therefore, the detection of internal impurities in cotton has become a key technical aspect for improving overall cotton quality control.

[0003] Traditional impurity detection mostly relies on manual sorting and manual sampling methods; however, with the continuous advancement of modern large-scale production, this method can no longer meet the textile industry's growing demand for high-quality cotton in terms of accuracy and efficiency; especially some deeply hidden internal impurities that are difficult to identify with the naked eye or have irregular shapes are even more difficult to accurately identify and remove through conventional means.

[0004] Against this backdrop, people have begun to try to use more advanced detection methods, including optical detection (infrared light, laser, etc.), X-ray detection, multispectral or hyperspectral imaging technology, and intelligent detection systems based on machine vision and artificial intelligence algorithms. These technologies can realize online monitoring and identification of impurities inside cotton on high-speed production lines, greatly improving detection accuracy and efficiency. However, the above technologies are costly, which deters small and medium-sized enterprises.

[0005] In response, the applicant has made improvements to existing visible light detection technology, which can effectively solve the shortcoming that existing visible light detection cannot identify impurities inside raw cotton and can only be detected by workers. Utility Model Content

[0006] The purpose of this invention is to provide a raw cotton impurity detection device based on a two-dimensional surface region. This device is able to acquire image information within the two-dimensional surface region of raw cotton based on visible light and visual recognition technology, and then identify internal impurities in the raw cotton based on the image information, thus solving the problem that existing visible light detection cannot identify internal impurities in raw cotton.

[0007] To address the aforementioned issues, this solution provides a raw cotton impurity detection device based on a two-dimensional surface region, comprising: The raw cotton pretreatment mechanism includes a cotton feeding mechanism and an opening mechanism. The cotton feeding mechanism is located at the front end of the opening mechanism to transport the evenly spread cotton layer to the opening mechanism, which is used to open the cotton layer.

[0008] A two-dimensional area image acquisition unit includes a cotton layer clamping mechanism and an image acquisition mechanism. The cotton layer clamping mechanism is used to construct a two-dimensional area for the loosened cotton layer. At the same time, a visible light source is provided on the cotton layer clamping mechanism to provide perspective light to the two-dimensional area of ​​the cotton layer, thereby projecting the image of impurities inside the cotton layer onto the two-dimensional area. The image acquisition mechanism is located on one side of the cotton layer clamping mechanism to acquire a perspective image of the cotton layer within the two-dimensional area.

[0009] As a preferred embodiment of this application: the cotton feeding mechanism includes a conveyor belt and a pair of extrusion rollers. The conveyor belt is located at the front end of the pair of extrusion rollers and is used to convey uniformly spread raw cotton. The pair of extrusion rollers includes two rollers arranged opposite each other, and a raw cotton extrusion channel is formed between the two rollers to extrude the uniformly spread cotton layer to make it flat.

[0010] As a preferred embodiment of this application: the opening mechanism includes a licker-in roller and a stripping roller. The outer circumference of the licker-in roller is provided with opening teeth, which can contact the pre-treated cotton layer to perform the opening operation. The stripping roller is located at the rear end of the licker-in roller and is provided with teeth, which can be used to separate the cotton layer from the licker-in roller.

[0011] As a preferred embodiment of this application: a guide plate frame is provided between the raw cotton pretreatment mechanism and the two-dimensional area image acquisition unit. One end of the guide plate frame extends to the cotton feeding mechanism, and the other end extends above the image acquisition mechanism. The connecting axis of the licker-in roller and the stripping roller is parallel to the axis of the guide plate frame.

[0012] As a preferred embodiment of this application: the cotton layer clamping mechanism is fixed on the frame, the cotton layer clamping mechanism includes a clamping fixed frame plate and a clamping movable frame plate, the clamping movable frame plate is located on the opposite side of the clamping fixed frame plate, and the clamping movable frame plate can move relative to the clamping fixed frame plate under the drive of the driving mechanism, thereby forming a cotton layer clamping cavity between the two.

[0013] As a preferred embodiment of this application: the driving mechanism includes at least a plurality of telescopic push-pull rods, the plurality of telescopic push-pull rods being disposed on one side of the clamping fixed frame plate, and the plurality of telescopic push-pull rods passing through the clamping fixed frame plate and being connected to the clamping moving frame plate.

[0014] As a preferred embodiment of this application: the driving mechanism further includes a limiting rod, which is arranged in parallel with the telescopic push-pull rod, and the limiting rod passes through the clamping fixed frame plate and is connected to the clamping moving frame plate to limit the clamping moving frame plate.

[0015] As a preferred embodiment of this application: the driving mechanism further includes a pressure sensor disposed on the contact surface of at least one of the clamping fixed frame plate and the clamping moving frame plate, and the pressure sensor is linked with the driving mechanism.

[0016] As a preferred embodiment of this application: the image acquisition mechanism includes an image acquisition module, which is mounted on the side of the frame near the clamping moving frame plate via a support guide rail, and the optical axis of the image acquisition module is aligned with the center position of the clamping moving frame plate.

[0017] As a preferred embodiment of this application: the visible light source comprises at least two sets, one set located behind the cotton layer to provide transparent light to the two-dimensional surface region, and the other set located in front of the cotton layer to provide a light source that ensures brightness to the image acquisition mechanism.

[0018] Compared with existing technologies, the advantages of this application are: This solution first loosens and pre-processes the cotton layer using an opening mechanism, then constructs a two-dimensional surface region of the cotton layer using a cotton layer clamping mechanism, and finally acquires a perspective image of the cotton layer with the cooperation of a visible light source and an image acquisition mechanism. This perspective image can clearly identify impurities in the cotton layer. In other words, this solution, based on visible light and visual recognition technology, can acquire a perspective image of the two-dimensional surface region of the raw cotton, and then identify internal impurities in the raw cotton based on the perspective image. This solves the problem that existing visible light detection cannot identify internal impurities in raw cotton, and also provides a new method for online collection and detection of internal impurities in cotton. Attached Figure Description

[0019] Figure 1 This is a simplified structural diagram of the raw cotton impurity detection device based on a two-dimensional surface region provided by this utility model.

[0020] Figure 2 Provided by this utility model Figure 1 A schematic diagram of the structure along the AA direction.

[0021] Figure 3 Provided by this utility model Figure 1 A schematic diagram of the structure along the BB direction.

[0022] Figure 4 Provided by this utility model Figure 1 A schematic diagram of the structure along the CC direction.

[0023] Figure 5 A diagram showing the usage state of the cotton layer clamping mechanism provided by this utility model.

[0024] Figure Labels 1. Housing; 2. Conveyor belt; 3. Extrusion rollers; 31. Roller shaft; 32. Gear set; 33. Coupling; 4. Spike roller; 41. Opening tooth; 5. Peeling roller; 51. Picking tooth; 6. Transmission belt; 7. Motor; 8. Guide plate frame; 9. Machine frame; 10. Clamping fixed frame plate; 11. Clamping moving frame plate; 12. Telescopic push-pull rod; 13. Pneumatic actuator module; 14. Limiting upright; 15. Pressure sensor; 16. Visible light source; 161. Light source bracket; 162. LED light source; 17. Image acquisition module; 18. Support rail; 19. Baffle; 20. Limiting block; 21. Pulley. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of the present invention.

[0026] This embodiment provides a raw cotton impurity detection device based on a two-dimensional surface region. See [link to relevant documentation]. Figure 1 As shown, the system includes a raw cotton pretreatment mechanism and a two-dimensional area image acquisition unit. In this embodiment, the raw cotton pretreatment mechanism includes a frame and a housing 1, and the arrangement height of the raw cotton pretreatment mechanism is higher than that of the two-dimensional area image acquisition unit. The raw cotton pretreatment mechanism includes a cotton feeding mechanism and an opening mechanism. The cotton feeding mechanism is located at the front end of the opening mechanism. The raw cotton is evenly spread on the cotton feeding mechanism, and the cotton feeding mechanism is activated to transport the cotton layer, i.e., the raw cotton, to the opening mechanism. The opening mechanism is used to open the cotton layer. The main purpose of the opening process is to tear apart the compact parts or fiber clumps of the cotton layer, on the one hand reducing the density of the cotton layer to facilitate light transmission, and on the other hand fully exposing the impurities that were originally wrapped. The two-dimensional area image acquisition unit includes a cotton layer clamping mechanism. The cotton layer clamping mechanism is used to fix the opened cotton layer and construct a two-dimensional surface region. At the same time, a visible light source 16 is provided on the cotton layer clamping mechanism to provide transparent light to the two-dimensional surface region of the cotton layer, thereby projecting the image of impurities inside the cotton layer onto the two-dimensional surface region. In this embodiment, since the cotton layer has been opened in the pre-processing stage, the overall density of the cotton layer is small, and the impurities are not blocked by fiber clusters. Therefore, the visible light can directly or with minimal attenuation irradiate the impurities, thereby projecting the impurities onto the two-dimensional surface region as comprehensively as possible. The image acquisition mechanism is set on one side of the cotton layer clamping mechanism to acquire a transparent image of the cotton layer within the two-dimensional surface region. The transparent image can display the projection of each impurity, providing a data basis for subsequent impurity analysis.

[0027] Specifically, in this embodiment, the cotton layer is first pre-treated by an opening mechanism to reduce its density and fiber clumps, preventing impurities from being obscured. Then, a two-dimensional surface region of the cotton layer is constructed using a cotton layer clamping mechanism. Finally, a perspective image of the cotton layer is acquired with the cooperation of a visible light source 16 and an image acquisition mechanism. Impurities in the cotton layer can be clearly identified through this perspective image. In other words, this embodiment can acquire a perspective image of the two-dimensional surface region of the raw cotton based on visible light and visual recognition technology, and then identify internal impurities of the raw cotton based on the perspective image. This solves the problem that existing visible light detection cannot identify internal impurities of raw cotton, and provides a new method for online collection and detection of internal impurities in cotton.

[0028] As a preferred embodiment, the cotton feeding mechanism is installed inside the housing 1 of the raw cotton pretreatment mechanism, such as... Figure 1 As shown, an open design is also possible if necessary. This housing 1 improves the safety of the cotton feeding mechanism and prevents cotton lint from spreading into the air during the opening process. The cotton feeding mechanism includes a conveyor belt 2 and compression rollers 3. The conveyor belt 2 is a traditional belt-type conveyor belt, located at the front end of the compression rollers 3. The operator lays the sample raw cotton flat on the conveyor belt 2 and then conveys it to the compression rollers 3. The compression rollers 3 include two opposing roller shafts 31. It is understood that the length of these two rollers should be greater than or equal to the width of the raw cotton (cotton layer) on the conveyor belt 6. A raw cotton compression channel is formed between the two roller shafts 31 to compress the evenly laid raw cotton and make it flat. Figure 2 The diagram shows the structure of the extrusion roller 3 provided in this embodiment. Two roller shafts 31 are fixed to the frame through bearing seats. One roller shaft 31 serves as the active roller and is connected to the drive unit, while the other roller shaft 31 serves as the driven roller. The active roller and the driven roller are connected through a gear set 32. When the drive unit drives the active roller to rotate, the gear set 32 ​​drives the driven roller to rotate synchronously, thereby extruding the cotton layer conveyed by the conveyor belt 2 to shape it and improve the uniformity of the cotton layer structure. In this embodiment, the drive unit is preferably a motor 7. The motor 7 is connected to the drive shaft of the active roller through a coupling 33. It can be understood that the model of the motor 7 can be selected according to actual needs, and this embodiment does not make a specific limitation.

[0029] As a preferred embodiment, the opening mechanism includes a licking roller 4 and a stripping roller 5, such as Figure 1As shown, the outer circumference of the licker-in roller 4 is provided with opening teeth 41. The opening teeth 41 are at least one of conical spikes and hook structures. The opening teeth 41 can contact the pre-treated cotton layer to tear the cotton layer. In this embodiment, the height of the opening teeth 41 should be sufficient to pierce the cotton layer. At the same time, the density of the opening teeth 41 should be sufficient to achieve uniform opening. In use, the opening teeth 41 are inserted into the cotton layer and tear the cotton layer with the assistance of the cotton layer's own gravity to achieve opening. The opening operation can reduce the density of the cotton layer after compression. At the same time, it can also eliminate most of the fiber clumps and expose impurities. The peeling roller 5 is located at the rear end of the licker-in roller 4. The peeling roller 5 is provided with teeth 51. The teeth 51 can be used to separate the cotton layer from the licker-in roller 4. In this embodiment, the purpose of the peeling roller 5 is to peel the cotton layer off the opening teeth 41 to avoid the cotton layer from getting tangled on the licker-in roller 4. At the same time, it also avoids cotton residue on the opening teeth 41, which would affect the normal operation of the opening teeth 41.

[0030] In this embodiment, the piercing roller 4 and the stripping roller 5 are driven by corresponding drive components. The drive components include a motor 7, a transmission belt 6, and pulleys 21 disposed at the ends of the piercing roller 4 and the stripping roller 5. In use, the transmission belt 6 is connected between the pulleys 21 and the motor 7, and the drive motor 7 can drive the piercing roller 4 or the stripping roller 5 to rotate through the pulleys 21. In this embodiment, it is preferable that the piercing roller 4 and the stripping roller 5 rotate in the same direction.

[0031] like Figure 3 The diagram shown is a cross-sectional view of the peeling roller 5 provided in this embodiment. (See attached diagram.) Figure 1 It can be seen that the tooth 51 includes a conical tooth and a cleaning brush. The height of the cleaning brush is greater than that of the conical tooth, and the number of cleaning brushes is less than that of the conical tooth. The conical tooth is used to peel the cotton layer from the opening tooth 41 to ensure the normal operation of the cotton layer. The purpose of the cleaning brush is to clean the cotton remaining on the opening tooth 41. The coordinated use of the conical tooth and the cleaning brush not only ensures the normal operation of the cotton layer, but also avoids the interference of the remaining cotton on the opening tooth 41.

[0032] In this embodiment, a guide plate frame 8 is provided between the raw cotton pretreatment mechanism and the two-dimensional area image acquisition unit. One end of the guide plate frame 8 extends to the cotton feeding mechanism, and the other end extends above the image acquisition mechanism. The connecting axis of the licker-in roller 4 and the stripping roller 5 is parallel to the axis of the guide plate frame 8. The guide plate frame 8 can support and guide the cotton layer to ensure that the cotton layer pretreated by the cotton feeding mechanism and the opening mechanism can accurately enter the designated position of the image acquisition mechanism.

[0033] In a preferred embodiment, the cotton layer clamping mechanism is fixed to the frame 9, and the frame 9 has a columnar frame structure, such as... Figure 1 and 4As shown, the cotton layer clamping mechanism includes a clamping fixed frame plate 10 and a clamping movable frame plate 11. In this embodiment, both the clamping fixed frame plate 10 and the clamping movable frame plate 11 are plate-shaped structures with an opening in the middle. Preferably, transparent glass is provided at the opening to facilitate the passage of light. The clamping fixed frame plate 10 has an I-shaped structure and is fixed to one side of the frame 9. The clamping movable frame plate 11 is located on the opposite side of the clamping fixed frame plate 10. Under the drive of the driving mechanism, the clamping movable frame plate 11 can move relative to the clamping fixed frame plate 10 to form a cotton layer clamping cavity between the two. The loosened cotton layer can be clamped in the clamping cavity to form a two-dimensional surface region.

[0034] In this embodiment, the width of the clamping movable frame plate 11 is preferably smaller than the width of the clamping fixed frame plate 10. That is, the clamping movable frame plate 11 can move within the opening of the I-shaped clamping fixed frame plate 10. Figure 5 The diagram shows the state of the moving clamping frame 11 moving relative to the fixed clamping frame. The advantage of setting the moving clamping frame 11 as an I-shape is that it can make the cotton layer clamping cavity have a closed structure around it.

[0035] In this embodiment, in order to ensure that the cotton layer after opening can smoothly enter the cotton layer clamping cavity, it is preferable to provide a baffle 19 that connects with the guide plate at the upper opening position of the frame.

[0036] In this embodiment, the driving mechanism that moves the clamping moving frame plate 11 includes at least multiple sets of telescopic push-pull rods 12. These multiple sets of telescopic push-pull rods 12 are disposed on one side of the clamping fixed frame plate 10, and are connected to the clamping moving frame plate 11 after passing through the clamping fixed frame plate 10. In this embodiment, the telescopic push-pull rod 12 is preferably a cylinder or a screw. A pneumatic actuator module 13 is connected to the end of the pneumatic telescopic rod. The pneumatic actuator module 13 can drive the pneumatic telescopic rod to extend and retract, thereby moving the clamping moving frame plate 11 closer to or away from the clamping fixed frame plate. It is understood that in this embodiment, when the telescopic push-pull rod 12 is a cylinder, the size of the through hole on the clamping fixed frame plate 10 should be slightly larger than the piston rod diameter of the cylinder; when the telescopic push-pull rod 12 is a screw, the through hole on the clamping fixed frame plate 10 should be a threaded hole.

[0037] In this embodiment, the driving mechanism also includes a limiting rod 14, which is arranged in parallel with the telescopic push-pull rod 12. The limiting rod 14 passes through the clamping fixed frame plate 10 and connects to the clamping moving frame plate 11. Preferably, in this embodiment, the limiting rod 14 is located at the four corners of the clamping fixed frame plate 10 and the clamping moving frame plate 11, and the telescopic push-pull rod 12 is located at the middle of both sides of the clamping fixed frame plate 10 and the clamping moving frame plate 11. The telescopic push-pull rod 12 is used to ensure the overall stability and synchronous translation of the clamping moving frame plate 11, and the limiting rod 14 is used to limit the clamping moving frame plate 11 to prevent displacement.

[0038] In this embodiment, the drive mechanism also includes a pressure sensor 15, which is disposed on the contact surface of at least one of the clamping fixed frame plate 10 and the clamping moving frame plate 11. The pressure sensor 15 is linked with the drive mechanism. It is understood that the pressure sensor 15 is preferably a miniature sensor, specifically a miniature load sensor of model NTJH-10, which is small in size and easy to install, meeting the requirements of this embodiment. The pressure sensor 15 is embedded in the contact surface of the clamping fixed frame plate 10. When in use, when the clamping force between the clamping moving frame plate 11 and the clamping fixed frame plate 10 is measured to be greater than or equal to 40N, the controller controls the pneumatic actuator module 13 to lose power, thereby controlling the telescopic push-pull rod 12 to stop running.

[0039] In this embodiment, the image acquisition mechanism includes an image acquisition module 17. This image acquisition module 17 is mounted on the side of the frame 9 near the clamping moving frame plate 11 via a support guide rail 18. The optical axis of the image acquisition module 17 is aligned with the center of the clamping moving frame plate 11, meaning that the image acquisition module 17 can acquire the largest possible area of ​​a two-dimensional surface region image. Figure 1 As shown, the support rail 18 is a triangular bracket, which is welded to the outside of the frame 9. In this embodiment, in order to facilitate the adjustment of the position of the image acquisition module 17 and achieve effective focusing, the support rail 18 is preferably provided with a slide rail. The image acquisition module 17 is mounted on the slide rail through the rail. The position of the image acquisition module 17 can be adjusted as needed with the cooperation of the slide rail and the rail.

[0040] In this embodiment, the image acquisition module 17 is an industrial camera and a zoom lens.

[0041] In this embodiment, the visible light source 16 includes at least two sets. One set is located behind the cotton layer to provide light to the two-dimensional surface area, and the other set is located in front of the cotton layer to provide a light source that ensures brightness to the image acquisition mechanism. In this embodiment, the visible light source 16 is an LED light source 162. The visible light source 16 includes a light source bracket 161 and an LED light source 162. The housings of the light source bracket 161 and the LED light source 162 are fixed by bolts. The light source bracket 161 has a slotted opening, so that the LED light source 162 can be adjusted up and down within a certain range according to the contrast.

[0042] In actual operation, the operator first takes a certain amount of raw cotton and spreads it evenly on the conveyor belt 2 of the raw cotton pretreatment mechanism, ensuring that the cotton layer thickness is no more than 5cm. The operator then turns on the overall power system, presses the start button, and the motor 7 drives the extrusion rollers 3 to start running. The extrusion rollers 3 first flatten and extrude the raw cotton on the conveyor belt 2 to form a cotton layer. Under the support and guidance of the guide plate frame 8, the cotton layer enters the opening mechanism. The licker roller 4 of the opening mechanism first opens the flattened cotton layer, and then the peeling roller 5 at the rear peels the cotton layer off the licker roller 4 while cleaning up any remaining cotton. The opened cotton layer falls into the cotton layer clamping mechanism below through the rear discharge port and the baffle 19. The telescopic push-pull rod 12 is activated to move the clamping moving frame plate towards the clamping fixed frame plate until the pressure sensor 15 detects that the extrusion pressure has reached the preset value. At this point, the telescopic push-pull rod 12 stops moving. At this point, the two-dimensional surface region of the cotton layer is constructed. Simultaneously, the pneumatic actuator module 13 starts working, and the cylinder drives the clamping moving frame plate 11 to move towards the clamping fixed frame plate 10 to squeeze the cotton layer. When the pressure sensor 15 detects that the squeezing force reaches the predetermined 40N, the cylinder stops working, completing the construction of the two-dimensional surface region. The visible light source 16 is activated, and the LED light source 162 starts working. Light is shone from the direction of the pneumatic actuator to project the image of internal impurities through the cotton sample. The LED light source 162 is adjusted in the direction of the industrial camera to ensure brightness. Finally, the industrial camera is activated to acquire a perspective image. After the image acquisition is completed, when the clamping moving frame plate 11 is pushed to the maximum limit by the cylinder, the cotton sample is taken out from the cotton layer clamping mechanism and enters the next image acquisition program for the content of internal impurities of the raw cotton, and the cycle repeats.

[0043] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various improvements without departing from this utility model, and these improvements should also be considered within the scope of protection of this utility model. These improvements will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of the claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A raw cotton impurity detection device based on a two-dimensional surface region, characterized in that, include: A raw cotton pretreatment mechanism includes a cotton feeding mechanism and an opening mechanism. The cotton feeding mechanism is located at the front end of the opening mechanism to transport the evenly spread cotton layer to the opening mechanism, which is used to open the cotton layer. A two-dimensional surface image acquisition unit includes a cotton layer clamping mechanism and an image acquisition mechanism. The cotton layer clamping mechanism is used to construct a two-dimensional surface for the loosened cotton layer. At the same time, a visible light source (16) is provided on the cotton layer clamping mechanism to provide perspective light to the two-dimensional surface of the cotton layer, thereby projecting the image of impurities inside the cotton layer onto the two-dimensional surface. The image acquisition mechanism is located on one side of the cotton layer clamping mechanism to acquire the perspective image of the cotton layer in the two-dimensional surface.

2. The raw cotton impurity detection device based on a two-dimensional surface region according to claim 1, characterized in that: The cotton feeding mechanism includes a conveyor belt (2) and a squeezing roller (3). The conveyor belt (2) is located at the front end of the squeezing roller (3) and is used to convey the uniformly spread raw cotton. The squeezing roller (3) includes two roller shafts (31) arranged opposite to each other. A raw cotton squeezing channel is formed between the two roller shafts (31) to squeeze the uniformly spread cotton layer to make it flat.

3. The raw cotton impurity detection device based on a two-dimensional surface region according to claim 1, characterized in that: The opening mechanism includes a licker-in roller (4) and a stripping roller (5). The outer circumference of the licker-in roller (4) is provided with opening teeth (41), which can contact the pre-treated cotton layer to perform the opening operation. The stripping roller (5) is located at the rear end of the licker-in roller (4), and the stripping roller (5) is provided with a tooth (51), which can be used to separate the cotton layer from the licker-in roller (4).

4. The raw cotton impurity detection device based on a two-dimensional surface region according to claim 3, characterized in that: A guide plate frame (8) is provided between the raw cotton pretreatment mechanism and the two-dimensional area image acquisition unit. One end of the guide plate frame (8) extends to the cotton feeding mechanism, and the other end extends above the image acquisition mechanism. The connecting axis of the licker-in roller (4) and the stripping roller (5) is parallel to the axis of the guide plate frame (8).

5. The raw cotton impurity detection device based on a two-dimensional surface region according to claim 1, characterized in that: The cotton layer clamping mechanism is fixed on the frame (9). The cotton layer clamping mechanism includes a clamping fixed frame plate (10) and a clamping movable frame plate (11). The clamping movable frame plate (11) is located on the opposite side of the clamping fixed frame plate (10). Under the drive of the driving mechanism, the clamping movable frame plate (11) can move relative to the clamping fixed frame plate (10) to form a cotton layer clamping cavity between the two.

6. The raw cotton impurity detection device based on a two-dimensional surface region according to claim 5, characterized in that: The driving mechanism includes at least a plurality of telescopic push-pull rods (12), which are arranged on one side of the clamping fixed frame plate (10) and are connected to the clamping moving frame plate (11) after passing through the clamping fixed frame plate (10).

7. The raw cotton impurity detection device based on a two-dimensional surface region according to claim 6, characterized in that: The driving mechanism also includes a limiting rod (14), which is arranged in parallel with the telescopic push-pull rod (12), and the limiting rod (14) passes through the clamping fixed frame plate (10) and is connected to the clamping moving frame plate (11) to limit the clamping moving frame plate (11).

8. The raw cotton impurity detection device based on a two-dimensional surface region according to claim 5, characterized in that: The drive mechanism also includes a pressure sensor (15) disposed on the contact surface of at least one of the clamping fixed frame plate (10) and the clamping moving frame plate (11), and the pressure sensor (15) is linked with the drive mechanism.

9. The raw cotton impurity detection device based on a two-dimensional surface region according to claim 5, characterized in that: The image acquisition mechanism includes an image acquisition module (17), which is set on the side of the frame (9) near the clamping moving frame plate (11) via a support guide rail (18), and the optical axis of the image acquisition module (17) is aligned with the center position of the clamping moving frame plate (11).

10. The raw cotton impurity detection device based on a two-dimensional surface region according to claim 1, characterized in that: The visible light source (16) comprises at least two sets, one set located behind the cotton layer to provide light to the two-dimensional surface region, and the other set located in front of the cotton layer to provide a light source that ensures brightness to the image acquisition mechanism.

Images