A detection device for printed and dyed products based on visual detection and a detection method thereof

Abstract

The present application relates to the technical field of visual detection, in particular to a detection device and method for printing and dyeing products based on visual detection. The device is arranged between the cloth unwinding and winding mechanism, comprising a base, a detection box, a camera, a display screen and a tensioning mechanism. The detection box is fixed on the top of the base, and the two sides are provided with inlet holes for cloth passing. The camera is placed in the detection box for detection. The tensioning mechanism includes a fixed frame and a plurality of first support rods arranged obliquely, and is fixed in the detection box. The cloth forms a wavy path through the first support rods, and the corresponding number of cameras image the cloth from different angles. The tensioning mechanism further comprises a first connecting frame, a second connecting frame and a driving assembly. The second connecting frame is fixed to the base, the two connecting frames are slidably provided with pressure plates on opposite sides, the driving assembly drives the upper pressure plate to move downward and cooperate with the lower pressure plate to clamp the cloth, and the cameras are separately arranged on the two sides. The device can improve the accuracy and comprehensiveness of identifying defects such as flaws and color difference of printing and dyeing products.

Description

Technical Field

[0001] This invention belongs to the field of visual inspection technology, and relates to a detection device and method for printed and dyed products based on visual inspection. Background Technology

[0002] In the printing and dyeing industry, quality inspection of printed and dyed products is a crucial link, as it directly affects the final quality of the products and their market competitiveness. With the continuous development of printing and dyeing technology and the increasing demands of the market for the quality of printed and dyed products, traditional manual inspection methods are no longer able to meet the needs of large-scale, high-efficiency, and high-precision production. Therefore, visual inspection-based printing and dyeing product inspection devices have emerged and are gradually becoming the mainstream means of quality inspection in the printing and dyeing industry.

[0003] Currently, while existing vision-based inspection devices for printed and dyed products on the market have improved inspection efficiency and accuracy to some extent, they still have the following drawbacks:

[0004] 1. It is difficult to ensure that the fabric maintains a stable and appropriate tension throughout the inspection process. The fabric is prone to wrinkles and loosening during the transmission process. This not only affects the shooting effect of the inspection camera, resulting in blurry and unclear inspection images, but also causes large errors in the inspection results. It is impossible to accurately identify defects such as flaws and color differences on the fabric, thus affecting the overall quality assessment of the printed and dyed products.

[0005] 2. Existing testing devices have a limited range of inspection angles, typically only able to inspect fabrics from a fixed angle. However, defects in printed and dyed products can have different forms and characteristics, making it difficult to comprehensively and accurately detect all problems from a single angle. This leads to the possibility of overlooking some subtle defects, reducing the comprehensiveness and reliability of the inspection and failing to meet the high-quality testing requirements of the printing and dyeing industry.

[0006] Therefore, we propose a visual inspection device and method for detecting printed and dyed products to solve the problems mentioned above. Summary of the Invention

[0007] In view of this, in order to solve the problem that it is difficult to ensure that the fabric maintains a stable and appropriate tension throughout the inspection process, and that the fabric can only be inspected from a fixed angle, the present invention provides a visual inspection device and method for printing and dyeing products.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a visual inspection-based detection device for printed and dyed products, disposed between the unwinding mechanism and the winding mechanism of the fabric, comprising:

[0009] The base is positioned between the unwinding mechanism and the rewinding mechanism;

[0010] The testing box is fixedly installed on the top of the base, and has inlet holes on both sides for the fabric to pass through;

[0011] A camera, installed inside the detection box, is used to detect the fabric.

[0012] A display screen is located on one side of the detection box and connected to the camera;

[0013] The tensioning mechanism causes the fabric to be compressed and deformed as it passes through it, and the camera detects the fabric from different angles.

[0014] As a further improvement to the above technical solution:

[0015] The tensioning mechanism includes a fixed frame and multiple first support rods. The fixed frame is fixed inside the detection box. The multiple first support rods are arranged obliquely on the top of the fixed frame in sequence. The number of cameras corresponds to the number of first support rods. The fixed frame is provided with a first guide rod corresponding to the first support rod. A moving block is slidably sleeved on the first guide rod. The top of the moving block is provided with a threaded hole. A stud is threaded into the threaded hole. The first support rod is fixedly connected to the stud. The top of the first guide rod is provided with a flat part. The bottom end of the stud abuts against the flat part.

[0016] The first support rod has a mushroom head at its top, and a first fixing rod is fixedly installed inside the detection box. Multiple cameras are fixedly installed on the first fixing rod.

[0017] The tensioning mechanism includes a first connecting frame, a second connecting frame, and a driving component. The second connecting frame is fixed to the top of the base. Two pressure plates are slidably arranged on opposite sides of the first and second connecting frames. The driving component drives the upper pressure plate to move downward and cooperate with the lower pressure plate to clamp the fabric.

[0018] The top of the second connecting frame is provided with two second electric push rods. The output end of the second electric push rod is connected to the pressure plate, driving the two sets of pressure plates to move away from each other to tighten the fabric. The output end of the second electric push rod is also provided with two second support rods, and the two cameras are respectively located on both sides of the second support rods.

[0019] The drive assembly includes a first electric push rod, which is fixed to the top of the detection box. Its output end extends into the detection box and is connected to a second fixed rod. The bottom end of the second fixed rod is connected to the first connecting frame through two third fixed seats.

[0020] The top of the detection box and the second fixing rod are provided with two second guide rods, the bottom of the second guide rods are connected to a first fixing seat, the bottom of the first fixing seat is fixed with a second fixing rod, a third guide rod is provided between the two second fixing seats, the mounting seat is slidably sleeved on the third guide rod, and the camera is fixed to one side of the mounting seat.

[0021] The mounting base and the second fixed rod are each provided with a first rotating seat on opposite sides. A first connecting rod is rotatably connected between the two first rotating seats. A first spring is sleeved on the outer wall of the first rotating seat. The two ends of the first spring abut against the second fixed rod and the first fixed seat, respectively.

[0022] The output end of the second electric push rod is provided with a second rotating seat, and the inner side of the lower pressure plate is provided with a third rotating seat. A second connecting rod is rotatably connected between the second rotating seat and the third rotating seat. The second support rod is L-shaped and its bottom end is fixed to the second rotating seat.

[0023] A visual inspection-based method for detecting printed and dyed products, using the aforementioned detection device, includes the following steps:

[0024] S1. Pass the fabric through the feed hole and fix it on the winding mechanism;

[0025] S2. Start the winding mechanism to tighten the fabric, and simultaneously start the camera for detection;

[0026] S3. The pressure plate is driven by the first electric push rod to clamp the fabric.

[0027] S4. The second electric push rod drives the pressure plates to move away from each other, thus tightening the fabric.

[0028] S5. The camera is moved horizontally by the extension and retraction of the first electric push rod to detect the fabric from different angles;

[0029] S6. Display the test results on the screen.

[0030] The beneficial effects of this invention are as follows:

[0031] 1. The present invention discloses a vision-based inspection device for printed and dyed products. This device uses a tensioning mechanism within the inspection chamber, including a fixing frame and first support rods, to tension the fabric. Multiple first support rods are arranged in a sequential, inclined configuration, with the number of cameras corresponding to the number of first support rods. This ensures the fabric remains relatively smooth during inspection, reducing inspection errors caused by fabric wrinkles, looseness, etc., thereby significantly improving the accuracy of printed and dyed product inspection and ensuring accurate identification of defects, color differences, and other issues on the fabric.

[0032] 2. The visual inspection device for printed and dyed products disclosed in this invention has a tensioning mechanism in which the first support rod and the stud are integrally formed, and the stud is connected to the moving block through a threaded hole. The moving block can slide on the first guide rod, and the bottom end of the stud abuts against the flat part, so that the position of the first support rod can be flexibly adjusted according to actual needs. The operator can complete the adjustment without complicated tools or operating procedures, which greatly improves the ease of operation and flexibility of the device.

[0033] 3. The visual inspection device for printed and dyed products disclosed in this invention includes a tensioning mechanism comprising a first connecting frame, a second connecting frame, and a driving component. The driving component drives two upper pressure plates to move downwards to cooperate with two lower pressure plates in clamping the fabric. Then, a second electric push rod drives the two sets of pressure plates to move away from each other, thereby achieving tensioning of the fabric. This enables the fabric to maintain stable tension during the inspection process, avoiding the problem of uneven fabric tension affecting the inspection results, further optimizing the fabric tensioning effect, and providing a guarantee for high-precision inspection.

[0034] 4. The visual inspection device for printed and dyed products disclosed in this invention utilizes a first electric push rod to drive a second fixed rod downwards, and a first fixed seat to drive downwards via a first spring, causing the upper and lower pressure plates to clamp the fabric. Simultaneously, the second electric push rod extends to drive the two lower pressure plates away from each other, causing the upper pressure plate to move and tighten the fabric, forming an inverted V-shape. The camera is located on both sides of the second support rod. During the inspection process, the extension and retraction of the first electric push rod can drive the camera to move horizontally, enabling the inspection of the fabric at different angles. This allows for a more comprehensive discovery of various defects on the fabric, improving the comprehensiveness and reliability of the inspection.

[0035] 5. The visual inspection device for printed and dyed products disclosed in this invention has a second guide rod slidably mounted through the top of the inspection box and the second fixed rod, providing stable guidance for the movement of the second fixed rod, avoiding shaking or deviation during movement, ensuring the smoothness of camera movement, and thus improving the accuracy of the inspection results. At the same time, the pressure plate is slidably mounted in the first and second connecting frames through the fourth guide rod, and the outer wall of the fourth guide rod is fitted with a second spring, which not only provides guidance for the movement of the pressure plate, but also allows the pressure plate to maintain a certain elasticity when clamping the fabric through the action of the second spring, avoiding damage to the fabric due to excessive clamping force, and enhancing the structural stability and reliability of the device.

[0036] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0037] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0038] Figure 1 This is a three-dimensional structural schematic diagram of a vision-based detection device for printed and dyed products according to Embodiment 1 of the present invention.

[0039] Figure 2 This is a schematic diagram of the camera mounting structure of a vision-based detection device for printed and dyed products according to Embodiment 1 of the present invention.

[0040] Figure 3 This is a schematic diagram of the support rod and fixing frame installation structure of a vision-based detection device for printed and dyed products according to Embodiment 1 of the present invention.

[0041] Figure 4 This is a schematic diagram of the installation structure of the moving block and the first guide rod of a vision-based detection device for printed and dyed products according to Embodiment 2 of the present invention.

[0042] Figure 5 This is a three-dimensional structural schematic diagram of a vision-based detection device for printed and dyed products according to Embodiment 2 of the present invention.

[0043] Figure 6 This is a schematic diagram of the camera mounting structure of a vision-based detection device for printed and dyed products according to Embodiment 2 of the present invention.

[0044] Figure 7 This is a schematic diagram of the connecting rod and mounting base structure of a vision-based detection device for printed and dyed products according to Embodiment 2 of the present invention.

[0045] Figure 8 This is a schematic diagram of the connection frame and pressure plate structure of a vision-based detection device for printed and dyed products according to Embodiment 2 of the present invention.

[0046] Reference numerals: 1. Base; 2. Detection box; 3. Display screen; 4. Feed port; 5. Controller; 6. First fixed rod; 7. Camera; 8. Fixing frame; 9. First support rod; 10. First guide rod; 11. Moving block; 12. Threaded hole; 13. Stud; 14. Flat part; 15. Mushroom head; 16. First electric push rod; 17. Second guide rod; 18. First fixed seat; 20. First connecting frame; 21. Second connecting frame; 22. Second fixed rod; 23. First spring; 24. Second fixed seat; 25. Third fixed seat; 26. Mounting seat; 27. First rotating seat; 28. Third guide rod; 29. ​​First connecting rod; 30. Pressure plate; 31. Fourth guide rod; 32. Second spring; 33. Second electric push rod; 34. Second rotating seat; 35. Second connecting rod; 36. Third rotating seat; 37. Second support rod; 38. Insertion hole; 39. Insertion rod. Detailed Implementation

[0047] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0048] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0049] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0050] Example 1

[0051] likeFigures 1-3 As shown, a vision-based inspection device for printed and dyed products includes a base 1, which is positioned between a fabric unwinding mechanism and a fabric rewinding mechanism to support the entire inspection device. An inspection box 2 is bolted to the top of the base 1. The inspection box 2 has inlet holes 4 on both sides for the fabric to pass through, allowing the fabric to enter the inspection box 2 for inspection. A controller 5, connected to the unwinding and rewinding mechanisms, is located on one side of the base 1 to control the unwinding and rewinding processes.

[0052] The inspection box 2 is equipped with multiple cameras 7 (with autofocus) for inspecting fabrics; the exact number can be determined based on actual inspection needs. A display screen 3 connected to the cameras 7 is located on one side of the inspection box 2 to display the inspection results, allowing operators to observe the results in real time.

[0053] The tensioning mechanism is installed inside the testing box 2 to tension the fabric and ensure that the fabric remains flat during the testing process. The tensioning mechanism mainly includes components such as a fixed frame 8, a first support rod 9, a first guide rod 10, a moving block 11, and a stud 13.

[0054] The fixing frame 8 is set inside the inspection box 2. The top of the fixing frame 8 is provided with multiple first support rods 9. The number of first support rods 9 corresponds to the number of cameras 7. The multiple first support rods 9 are arranged in a tilted manner. The tilted arrangement helps to keep the fabric flat during the inspection process and reduce wrinkles and deformation.

[0055] A first guide rod 10, corresponding to the first support rod 9, is bolted to the inside of the fixing frame 8. A movable block 11 is slidably fitted onto the outer wall of the first guide rod 10. A threaded hole 12 is formed at the top of the movable block 11, and a stud 13 is threaded into the threaded hole 12. A flat portion 14 is formed at the top of the first guide rod 10, and the bottom end of the stud 13 abuts against the flat portion 14. By rotating the stud 13, the movable block 11 can be fixed to the first guide rod 10, and the first support rod 9 can be fixed to the movable block 11. At the same time, the thread direction of the stud 13 is in the same direction as the movement direction of the fabric, preventing the stud 13 from rotating during the movement of the fabric. The height of the first support rod 9 can be changed as needed.

[0056] The top of the first support rod 9 is equipped with a mushroom head 15 (which can be made of smooth metal). The design of the mushroom head 15 helps to reduce friction between the fabric and the first support rod 9, protecting the fabric from damage. A first fixing rod 6 is fixedly installed inside the detection box 2. Multiple cameras 7 are bolted to the first fixing rod 6. The positions of the cameras 7 correspond to the first support rod 9 to accurately detect the fabric.

[0057] In use, one end of the fabric is passed through the feed hole 4 and fixed on the winding mechanism on one side of the base 1. Then the winding mechanism is started to wind up the fabric, making it taut. During the tautness process, it can be supported by multiple first support rods 9 to make it smooth. The camera 7 is started to detect the fabric, and the detected image can be displayed on the display screen 3. Since the multiple first support rods 9 are arranged at an angle, and the camera 7 can correspond to the first support rods 9.

[0058] Simultaneously, the unwinding mechanism is activated to unwind the winding, and the rewinding mechanism is activated to rewind the winding, with inspection performed while the winding is being performed.

[0059] Example 2

[0060] Reference Figures 3-8 This invention provides a novel technical solution: a visual inspection device for printed and dyed products. The tensioning mechanism further includes a first connecting frame 20, a second connecting frame 21, and a driving assembly. The second connecting frame 21 is bolted to the top of the base 1. Two pressure plates 30 are slidably provided on the adjacent sides of both the first and second connecting frames 20 and 21. The driving assembly drives the two upper pressure plates 30 to move downwards, cooperating with the two lower pressure plates 30 to clamp the fabric. Rubber pads are provided on the adjacent sides of both the upper and lower pressure plates 30 to increase friction with the fabric.

[0061] The top of the second connecting frame 21 is bolted with two second electric push rods 33, the output ends of which are connected to two pressure plates 30. By controlling the extension and retraction of the second electric push rods 33, the two sets of pressure plates 30 can be driven to move closer or further apart, thereby achieving the clamping and releasing of the fabric.

[0062] The output end of the second electric push rod 33 is also equipped with two second support rods 37. The second support rods 37 can support the clamped fabric, making the fabric form an inverted V shape. There are two cameras 7, located on both sides of the second support rods 37. This allows the cameras 7 to detect the fabric from different angles, improving the accuracy and comprehensiveness of the detection.

[0063] The drive assembly includes a first electric push rod 16 bolted to the top of the detection box 2. The output end of the first electric push rod 16 extends into the detection box 2 and is bolted to a connecting plate 40. The bottom end of the connecting plate 40 is connected to two third fixing seats 25, and a first connecting frame 20 is bolted between the two third fixing seats 25.

[0064] When the first electric push rod 16 extends, it can drive the connecting plate 40 to move downward, and then drive the first connecting frame 20 to move closer to the second connecting frame 21 through the third fixed seat 25, so that the upper and lower pressure plates 30 clamp the fabric.

[0065] Two second guide rods 17 are slidably mounted through the top of the detection box 2 and the second fixing rod 22. The bottom end of each second guide rod 17 is connected to a first fixing seat 18. The bottom of the first fixing seat 18 is fixedly fitted with the second fixing rod 22, and a second fixing seat 24 is fixedly fitted onto the outer wall of the second fixing rod 22. A third guide rod 28 is fixedly mounted between the two second fixing seats 24, and a mounting seat 26 is slidably fitted onto the outer wall of the third guide rod 28. The camera 7 is bolted to one side of the mounting seat 26.

[0066] First rotating seats 27 are fixedly mounted on the adjacent sides of the mounting base 26 and the connecting plate 40, and a first connecting rod 29 is rotatably connected between the two first rotating seats 27. A first spring 23 is sleeved on the outer wall of the first rotating seat 27, and the two ends of the first spring 23 abut against the adjacent sides of the second fixed rod 22 and the first fixed seat 18 through the connecting seat, respectively. When the first electric push rod 16 continues to extend, the first connecting rod 29 can drive the mounting base 26 to move on the third guide rod 28, thereby driving the camera 7 to move horizontally, realizing comprehensive detection of the fabric, so that the fabric is clamped first, and then the camera 7 is controlled to move horizontally.

[0067] Two insert rods 39 are fixedly installed on the top of each of the two lower pressure plates 30, and insertion holes 38 are opened on the top of each of the two upper pressure plates 30 for inserting the insert rods 39. This allows the lower pressure plate 30 to drive the upper pressure plate 30 to move through the insert rods 39 and insertion holes 38 during movement, and also allows the upper pressure plate 30 to be guided.

[0068] Two fourth guide rods 31 are fixedly installed inside the first connecting frame 20 and the second connecting frame 21, and the pressure plate 30 is slidably sleeved on the two fourth guide rods 31. A second spring 32 is sleeved on the outer wall of the fourth guide rod 31, and both ends of the second spring 32 abut against one side of the pressure plate 30, the first connecting frame 20, and the second connecting frame 21, respectively. The design of the second spring 32 helps to provide cushioning during the movement of the pressure plate 30, reducing damage to the fabric, and can guide the pressure plate 30 through the fourth guide rods 31. The first spring 23 and the second spring 32 are made of stainless steel or carbon steel.

[0069] The output end of the second electric push rod 33 is fixedly provided with a second rotating seat 34, and a third rotating seat 36 is welded to the side of the two lower pressure plates 30 that are close to each other. A second connecting rod 35 is rotatably provided between the second rotating seat 34 and the third rotating seat 36. The second support rod 37 is L-shaped and its bottom end is fixedly connected to the second rotating seat 34. When the second electric push rod 33 extends, the second connecting rod 35 can drive the two lower pressure plates 30 to move away from each other. At the same time, the lower pressure plate 30 drives the upper pressure plate 30 to move by using the insertion rod 39 and the insertion hole 38, thereby tightening and straightening the fabric, increasing the spacing between the warp and weft threads of the fabric to facilitate the detection of the printing and dyeing effect. The shape of the pressure plate 30 can be selected according to the actual clamping requirements, such as rectangular, trapezoidal, or irregularly shaped plates with specific curvature (such as arc or wavy contact surfaces). The key is that the part that contacts the fabric must ensure sufficient friction and uniform pressure distribution to avoid damaging the fabric.

[0070] In use, one end of the fabric is passed through the feed hole 4 and positioned between the second connecting frame 21 and the first connecting frame 20, and the other end of the fabric is connected to the winding mechanism.

[0071] When the first electric push rod 16 is extended, it can drive the second fixed rod 22 to move downward. When the second fixed rod 22 moves downward, it can drive the first fixed seat 18 to move downward through the two first springs 23, and use the third fixed seat 25 to drive the first connecting frame 20 to move closer to the second connecting frame 21, so that the upper and lower pressure plates 30 clamp the fabric.

[0072] When the second electric push rod 33 is extended, the second electric push rod 33 can drive the two lower pressure plates 30 to move away from each other using the second connecting rod 35. The lower pressure plate 30 can drive the upper pressure plate 30 to move using the insert rod 39 and the insert hole 38, which can tighten the fabric and make the warp and weft threads of the fabric have gaps. At the same time, the middle fabric overlaps on the two second support rods 37 to form an inverted V shape.

[0073] The first electric push rod 16 is activated to extend. During the extension process, the second fixed rod 22 can continue to move downward. The first connecting rod 29 can drive the mounting base 26 to move on the third guide rod 28, thereby driving the camera 7 to move horizontally. The camera 7 on one side detects the fabric on the left side, and the camera 7 on the other side detects the fabric on the right side. The detection screen is displayed on the display screen 3.

[0074] After the inspection of the left side is completed, the first electric push rod 16 is activated to retract, so that the upper and lower pressure plates 30 are moved away from each other. The unwinding mechanism is activated to unwind, and the winding mechanism is activated to wind up, which drives the fabric to move, so that the fabric on the left side moves to the right side for inspection at different angles.

[0075] However, as is well known to those skilled in the art, the working principles and wiring methods of the first electric actuator 16 and the second electric actuator 33 are commonplace and are conventional methods or common knowledge. They will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0076] Finally, it should be noted that 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A vision-based inspection device for printed and dyed products, disposed between a fabric unwinding mechanism and a fabric winding mechanism, characterized in that, include: The base (1) is located between the unwinding mechanism and the winding mechanism; The testing box (2) is fixedly installed on the top of the base (1), and has inlet holes (4) on both sides for the fabric to pass through. A camera (7) is installed inside the detection box (2) for detecting the fabric; The display screen (3) is located on one side of the detection box (2) and connected to the camera (7); The tensioning mechanism causes the fabric to deform under pressure when it passes through it. The camera (7) detects the fabric from different angles. The tensioning mechanism includes a first connecting frame (20), a second connecting frame (21), and a driving assembly. The second connecting frame (21) is fixed to the top of the base (1). Two pressure plates (30) are slidably arranged on opposite sides of the first connecting frame (20) and the second connecting frame (21). The driving assembly drives the upper pressure plate (30) to move downward and cooperate with the lower pressure plate (30) to clamp the fabric. The top of the second connecting frame (21) is provided with two second electric push rods (33). The output end of the second electric push rod (33) is connected to the pressure plate (30) and drives the two sets of pressure plates (30) to move away from each other to tighten the fabric. The driving assembly includes a first electric push rod (16). The first electric push rod (16) is fixed to the top of the detection box (2), and its output end extends into the detection box (2) and is connected to a second fixing rod (22). The bottom end of the second fixed rod (22) is connected to the first connecting frame (20) through two third fixed seats (25). The top of the detection box (2) and the second fixed rod (22) is provided with two second guide rods (17). The bottom end of the second guide rod (17) is connected to a first fixed seat (18). The bottom of the first fixed seat (18) is fixedly provided with the second fixed rod (22). A third guide rod (28) is provided between the two second fixed seats (24). The mounting seat (26) is slidably sleeved on the third guide rod (28). The camera (7) is fixed on one side of the mounting seat (26). A first rotating seat (27) is provided on each side opposite to the mounting seat (26) and the second fixed rod (22). A first connecting rod (29) is rotatably connected between the two first rotating seats (27). A first spring (23) is sleeved on the outer wall of the first rotating seat (27). The two ends of the first spring (23) abut against the second fixed rod (22) and the first fixed seat (18) respectively.

2. The detection device according to claim 1, characterized in that, The output end of the second electric push rod (33) is provided with a second rotating seat (34), and the inner side of the lower pressure plate (30) is provided with a third rotating seat (36). A second connecting rod (35) is rotatably connected between the second rotating seat (34) and the third rotating seat (36). The second support rod (37) is L-shaped and its bottom end is fixed to the second rotating seat (34).

3. A method for detecting printed and dyed products based on visual inspection, employing the detection device described in claim 2, characterized in that, Includes the following steps: S1. Pass the fabric through the feed hole (4) and fix it on the winding mechanism; S2. Start the winding mechanism to tighten the fabric, and at the same time start the camera (7) for detection; S3. The pressure plate (30) is driven by the first electric push rod (16) to clamp the fabric; S4. The pressure plates (30) are driven to move away from each other by the second electric push rod (33) to tighten the fabric; S5. The camera (7) is moved horizontally by the telescopic drive of the first electric push rod (16) to detect the fabric from different angles; S6. Display the test results on the display screen (3).

Images