Device and method for detecting surface defects of optical prism film based on brightness enhancement

Abstract

The invention relates to the technical field of optical prism film surface defect detection, in particular to an optical prism film surface defect detection device and detection method.The device comprises a case, a detection camera and a light source, the detection camera is fixedly connected to the middle of the upper end of the case through a camera support, and an optical prism film is arranged at the lower end of the detection camera; a light source is mounted at the lower end of the optical prism film, an anti-wrinkle mechanism is mounted at the upper end of one side of the optical prism film, a driving roller is mounted at the lower side of one end of the optical prism film, and a supporting mechanism is mounted at the lower end of the driving roller; according to the optical prism film defect detection device, in the process of detecting the defects on the surface of the optical prism film, the problem that wrinkles appear at the edge position of the optical prism film can be avoided, and then the phenomenon that the wrinkles appear at the edge position of the optical prism film in the process of detecting the defects on the edge position of the optical prism film by a detection camera can be prevented. Therefore, the accuracy of the detection result is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical prism film surface defect detection, in particular to a device and method for detecting surface defects of an optical prism film based on light enhancement and brightening. Background Art

[0002] The device for detecting defects on the surface of optical prism film based on light enhancement and brightening is a device for detecting defects and flaws on the surface of optical prism film, and the device usually includes components such as high-resolution optical imaging system, light source, image processing software, etc. Its working principle is to scan or image the surface of the optical prism film through an optical imaging system, and transmit the acquired image to the image processing software for analysis and processing. In the image processing software, image processing algorithms and pattern recognition technology can be used to detect and identify surface defects, flaws or stains. This kind of detection device usually has high sensitivity and high resolution, and can accurately identify tiny defects and surface defects, thereby ensuring the quality and performance of the optical prism film. At the same time, it can also realize the automated detection process, improve the detection efficiency and accuracy, and reduce labor costs and misjudgment rate; During the process of detecting defects on the surface of a brightness enhancing and brightening optical prism film, if wrinkles appear at the edge of the brightness enhancing and brightening optical prism film, there is a problem that the detection camera will misjudge the defects at the edge of the brightness enhancing and brightening optical prism film. Therefore, in order to solve the above problem, a detection device and a detection method for defects on the surface of a brightness enhancing and brightening optical prism film are proposed. Summary of the invention

[0003] The purpose of the present invention is to provide a detection device and a detection method based on the surface defects of the brightness enhancing and brightening optical prism film, so as to solve the problem that during the process of detecting the surface defects of the brightness enhancing and brightening optical prism film, if wrinkles appear at the edge of the brightness enhancing and brightening optical prism film, there is a problem that the detection camera will misjudge the defects at the edge of the brightness enhancing and brightening optical prism film.

[0004] To achieve the above object, the present invention provides the following technical solutions: The invention discloses a detection device and method for surface defects of an optical prism film for enhancing brightness and lightness, comprising a chassis, a detection camera and a light source, wherein the detection camera is fixedly connected to the middle of the upper end of the chassis through a camera bracket, an optical prism film is arranged at the lower end of the detection camera, a light source is installed at the lower end of the optical prism film, an anti-wrinkle mechanism is installed at the upper end of one side of the optical prism film, a driving roller is installed at the lower side of one end of the optical prism film, and a supporting mechanism is installed at the lower end of the driving roller; the anti-wrinkle mechanism comprises a cylinder, a threaded convex pattern is installed on the outer side of the cylinder, a central axis is connected to the inner side of the cylinder through a second hexagonal hole, a buffer mechanism is installed in the middle of the central axis, the buffer mechanism comprises a movable plate, a first hexagonal hole is opened on the inner side of the movable plate, the movable plates are connected by telescopic springs, a ball is rotatably connected to the inner side of one end of the movable plate away from the telescopic spring, the central axis comprises a column block, the column blocks are fixedly connected by a hexagonal column, and a positioning plate is welded and fixed at the connection between the column block and the hexagonal column.

[0005] As a further optimization of the present invention, a human-machine interaction device is installed on one side of the chassis, the human-machine interaction device, the detection camera and the light source are electrically connected, and the center points of the detection camera and the light source are arranged on the same vertical line.

[0006] As a further optimization of the present invention, there are two anti-wrinkle mechanisms, which are parallel to each other and are both installed inside the chassis, and the two anti-wrinkle mechanisms are arranged on both sides of the detection camera.

[0007] As a further optimization of the present invention, there are two cylinders, the cylinders have the same axis as the central axis, the interior of the cylinders is slidably connected to the hexagonal prism via a second hexagonal hole, and the cylinders are installed on both sides of the buffer mechanism.

[0008] As a further optimization of the present invention, there are two movable plates, which are slidably connected to the hexagonal prism through the first hexagonal hole, and are parallel to each other. One side of the movable plate equipped with a ball bearing is tightly attached to the cylinder through the ball bearing, and the telescopic spring is installed on the outside of the hexagonal prism.

[0009] As further optimized content of the present invention, the supporting mechanism includes a supporting roller, both ends of the supporting roller are fixedly connected to the moving end of the pressure sensor, the fixed end of the pressure sensor is fixedly connected to the moving rod, both ends of the moving rod are fixedly connected to guide rods, the middle of the moving rod is fixedly connected to a threaded rod, the guide rod is slidably connected to the inside of a fixed plate, the middle of the fixed plate is fixedly connected to a driving motor, the top end of the main shaft of the driving motor is connected to the threaded rod through a connecting flange, a threaded hole is opened inside the threaded rod, the threaded rod is spirally connected to the threaded rod through the threaded hole, and a controller is fixedly connected to the upper end of one side of the fixed plate.

[0010] As a further optimization of the present invention, the movable rod and the fixed plate are parallel, the fixed plate is welded and fixed inside the chassis, the movable rod is slidably connected inside the chassis, two guide rods are provided and the guide rods are parallel, and the angle between the guide rod and the fixed plate is 90°.

[0011] As a further optimized content of the present invention, wherein: the fixing plate includes a fixing plate body, sliding holes are opened on the inner sides of both ends of the fixing plate body, and the guide rod is slidably connected to the fixing plate body through the sliding holes.

[0012] As further optimized content of the present invention, the pressure sensor, controller and driving motor are electrically connected, the driving motor, connecting column and threaded rod have the same axis, the angle between the threaded rod and the moving rod is 90°, and two pressure sensors are provided, and the pressure sensors are parallel to each other.

[0013] As further optimized content of the present invention, wherein: S1: controlling the optical prism film to move to a position between the detection camera and the light source to detect defects on the surface of the optical prism film: the optical prism film is controlled to move inside the chassis through the anti-wrinkle mechanism, the support mechanism and the driving roller, and during the movement, the defects on the surface of the optical prism film are detected by the detection camera and the light source; S2: The anti-wrinkle mechanism is set to prevent the problem of wrinkles on the edge of the optical prism film during the movement inside the chassis: when the optical prism film moves at the lower end of the anti-wrinkle mechanism, the threaded protrusions set on the outer side of the cylinder will cause the optical prism film to generate a certain pulling force toward the positions on both sides of the chassis, thereby preventing the problem of wrinkles on the edge of the optical prism film during the movement inside the chassis. In this process, the cylinder is limited in the buffer mechanism, and a movable buffer is formed, which can prevent the problem of large pulling force on the optical prism film, causing the optical prism film to be pulled; S3: During the movement of the optical prism film, the supporting mechanism continuously presses the optical prism film to ensure that the optical prism film will not have the problem of anti-wrinkle mechanism and loose adhesion of the driving roller: During this process, the pressure sensor always maintains a set value. When the value changes, the controller will control the driving motor to rotate, and then adjust the distance of the threaded rod exposed on the outside of the connecting column to adjust the value of the pressure sensor, thereby ensuring that the supporting roller is always in contact with the optical prism film with a constant force.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by setting up the anti-wrinkle mechanism, in the process of detecting defects on the surface of the optical prism film, the problem of wrinkles at the edge of the optical prism film can be avoided, and thus the problem of misjudgment of the edge during the process of detecting defects at the edge of the optical prism film by the detection camera can be prevented, thereby effectively improving the accuracy of the detection result; 2. In the present invention, the supporting mechanism is set up to effectively avoid the situation that when the reel speed suddenly increases, the traction force increases, the friction force increases, the tension force increases instantly, and the film is deformed under the action of tensile stress, resulting in a decrease in apparent density and a type of defect such as a dent; and it can effectively avoid the situation that when the reel speed suddenly slows down, the traction force decreases, the tension force decreases instantly, the film roll relaxes, and there will be obvious wave-shaped indentations on the edge of the roller to form wrinkle defects, which further improves the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the installation position structure of the light source of the present invention; Figure 3 This is a schematic diagram of the structure of the anti-wrinkle mechanism of the present invention; Figure 4 This is a schematic diagram of the installation position structure of the second hexagonal hole of the present invention; Figure 5 This is a schematic diagram of the central column structure of the present invention; Figure 6 It is a schematic diagram of the structure of the buffer mechanism of the present invention; Figure 7 It is a schematic diagram of the supporting mechanism structure of the present invention; Figure 8 It is a schematic diagram of the fixing plate structure of the present invention.

[0016] In the figure: 1. Chassis; 2. Optical prism film; 3. Anti-wrinkle mechanism; 31. Cylinder; 32. Threaded raised pattern; 33. Buffer mechanism; 331. Moving plate; 332. First hexagonal hole; 333. Telescopic spring; 334. Ball; 34, central axis; 341, column block; 342, positioning plate; 343, hexagonal column; 35. Second hexagonal hole; 4. Camera bracket; 5. Detection camera; 6. Driving roller; 7. Support mechanism; 71. Support roller; 72. Pressure sensor; 73. Moving rod; 74. Guide rod; 75. Controller; 76. Driving motor; 77, fixed plate; 771, fixed plate body; 772, sliding hole; 78, connecting column; 79, connecting flange; 710, threaded rod; 711, threaded hole; 8. Human-computer interaction device; 9. Light source. DETAILED DESCRIPTION

[0017] See also Figure 1-8 , the present invention provides a technical solution: The device and method for detecting defects on the surface of an optical prism film based on light enhancement and brightening include a chassis 1, a detection camera 5 and a light source 9. The detection camera 5 is fixedly connected to the middle of the upper end of the chassis 1 through a camera bracket 4. The lower end of the detection camera 5 is provided with an optical prism film 2. The lower end of the optical prism film 2 is equipped with a light source 9. An anti-wrinkle mechanism 3 is installed on the upper end of one side of the optical prism film 2. A driving roller 6 is installed on the lower side of one end of the optical prism film 2. A supporting mechanism 7 is installed on the lower end of the driving roller 6. The anti-wrinkle mechanism 3 includes a cylinder 31. A threaded raised pattern 32 is installed on the outer side of the cylinder 31. The cylinder 3 The central shaft 34 is connected to the inner part through the second hexagonal hole 35, and the buffer mechanism 33 is installed in the middle of the central shaft 34. The buffer mechanism 33 includes a moving plate 331, and the first hexagonal hole 332 is opened inside the moving plate 331. The moving plates 331 are connected by telescopic springs 333. The inner side of one end of the moving plate 331 away from the telescopic spring 333 is rotatably connected with a ball 334. The central shaft 34 includes a column block 341, and the column blocks 341 are fixedly connected by a hexagonal column 343. A positioning plate 342 is welded and fixed at the connection between the column block 341 and the hexagonal column 343.

[0018] As a technical solution for further implementation of this solution, a human-machine interaction device 8 is installed on one side of the chassis 1. The human-machine interaction device 8, the detection camera 5 and the light source 9 are electrically connected. The center points of the detection camera 5 and the light source 9 are set on the same vertical line. Through the human-machine interaction device 8 set as above, the detection camera 5 and the light source 9 can be controlled during the detection process. At the same time, the light source 9 set at the bottom can improve the accuracy of the detection of the detection camera 5. As a technical solution for further implementation of this scheme, two anti-wrinkle mechanisms 3 are provided, which are parallel to each other and are both installed inside the chassis 1. The two anti-wrinkle mechanisms 3 are arranged on both sides of the detection camera 5. Two cylinders 31 are provided, and the cylinder 31 has the same axis as the central axis 34. The inside of the cylinder 31 is slidably connected with the hexagonal prism 343 through the second hexagonal hole 35 opened. The cylinder 31 is installed on both sides of the buffer mechanism 33. Two movable plates 331 are provided, and the movable plate 331 is slidably connected with the hexagonal prism 343 through the first hexagonal hole 332. The movable plates 331 are parallel to each other. One side of the movable plate 331 is installed with a ball 334 and is tightly attached to the cylinder 31 through the ball 334. The telescopic spring 333 is installed on the outside of the hexagonal prism 343. The two anti-wrinkle mechanisms 3 arranged as above can prevent the optical prism film 2 from having wrinkles on the edge during the detection process. As a technical solution for further implementation of the present scheme, the support mechanism 7 includes a support roller 71, both ends of the support roller 71 are fixedly connected to the moving end of the pressure sensor 72, the fixed end of the pressure sensor 72 is fixedly connected to the moving rod 73, both ends of the moving rod 73 are fixedly connected to guide rods 74, the middle of the moving rod 73 is fixedly connected to a threaded rod 710, the guide rod 74 is slidably connected to the inside of the fixed plate 77, the middle of the fixed plate 77 is fixedly connected to a drive motor 76, the top end of the main shaft of the drive motor 76 is connected to the threaded rod 710 through a connecting flange 79, a threaded hole 711 is provided inside the threaded rod 710, the threaded rod 710 is spirally connected to the threaded rod 710 through the threaded hole 711, a controller 75 is fixedly connected to the upper end of one side of the fixed plate 77, the moving rod 73 and the fixed plate 77 are parallel, the fixed plate 77 is welded and fixed inside the chassis 1, and the moving rod 73 is slidably connected to the chassis Inside the box 1, there are two guide rods 74, and the guide rods 74 are parallel to each other. The angle between the guide rods 74 and the fixed plate 77 is 90 degrees. The fixed plate 77 includes a fixed plate body 771. The inner sides of both ends of the fixed plate body 771 are provided with sliding holes 772. The guide rod 74 is slidably connected to the fixed plate body 771 through the sliding holes 772. The pressure sensor 72, the controller 75 and the drive motor 76 are electrically connected. The drive motor 76, the connecting column 78 and the threaded rod 710 have the same axis. The angle between the threaded rod 710 and the moving rod 73 is 90 degrees. There are two pressure sensors 72, and the pressure sensors 72 are parallel to each other. Through the above arrangement, it can be ensured that the supporting roller 71 is always in contact with the optical prism film 2 with a constant force, thereby preventing the optical prism film 2 from not being tightly attached to the anti-wrinkle mechanism 3 and the driving roller 6; S1: Control the optical prism film 2 to move to a position between the detection camera 5 and the light source 9 to detect defects on the surface of the optical prism film 2: The optical prism film 2 is controlled to move inside the chassis 1 through the anti-wrinkle mechanism 3, the support mechanism 7 and the driving roller 6. During the movement, the defects on the surface of the optical prism film 2 are detected by the detection camera 5 and the light source 9; S2: The anti-wrinkle mechanism 3 is provided to prevent the problem of wrinkles on the edge of the optical prism film 2 during the movement inside the chassis 1: during the movement of the optical prism film 2 at the lower end of the anti-wrinkle mechanism 3, the threaded protrusions 32 provided on the outer side of the cylinder 31 will cause a certain pulling force on the optical prism film 2 to the positions on both sides of the chassis 1, thereby preventing the problem of wrinkles on the edge of the optical prism film 2 during the movement inside the chassis 1. In this process, the cylinder 31 is limited in the buffer mechanism 33, and a movable buffer is formed, which can prevent the problem of large pulling force on the optical prism film 2, causing the optical prism film 2 to be damaged; S3: During the movement of the optical prism film 2, the support mechanism 7 continuously presses the optical prism film 2 to ensure that the optical prism film 2 will not have the problem of the anti-wrinkle mechanism 3 and the driving roller 6 not being able to stick tightly: During this process, the pressure sensor 72 always maintains a set value. When the value changes, the controller 75 controls the driving motor 76 to rotate, and then adjusts the distance of the threaded rod 710 exposed on the outside of the connecting column 78 to adjust the value of the pressure sensor 72, thereby ensuring that the support roller 71 is always in contact with the optical prism film 2 with a constant force.

[0019] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A device for detecting defects on the surface of an optical prism film based on light enhancement and brightening, comprising a chassis (1), a detection camera (5) and a light source (9), characterized in that: A detection camera (5) is fixedly connected to the middle of the upper end of the chassis (1) via a camera bracket (4); an optical prism film (2) is provided at the lower end of the detection camera (5); a light source (9) is installed at the lower end of the optical prism film (2); an anti-wrinkle mechanism (3) is installed at the upper end of one side of the optical prism film (2); a driving roller (6) is installed at the lower side of one end of the optical prism film (2); and a supporting mechanism (7) is installed at the lower end of the driving roller (6); The anti-wrinkle mechanism (3) comprises a cylinder (31), the outer side of the cylinder (31) is provided with a threaded protrusion pattern (32), the interior of the cylinder (31) is connected to a central shaft (34) via a second hexagonal hole (35), a buffer mechanism (33) is installed in the middle of the central shaft (34), the buffer mechanism (33) comprises a movable plate (331), the inner side of the movable plate (331) is provided with a first hexagonal hole (332), the movable plates (331) are connected to each other via a telescopic spring (333), the inner side of one end of the movable plate (331) away from the telescopic spring (333) is rotatably connected to a ball (334), the central shaft (34) comprises a column block (341), the column blocks (341) are fixedly connected to each other via a hexagonal column (343), and a positioning plate (342) is welded and fixed at the connection between the column block (341) and the hexagonal column (343).

2. The device for detecting surface defects of the optical prism film based on brightness enhancement and brightening according to claim 1, characterized in that: A human-machine interaction device (8) is installed on one side of the chassis (1); the human-machine interaction device (8), the detection camera (5) and the light source (9) are electrically connected; and the center points of the detection camera (5) and the light source (9) are arranged on the same vertical line.

3. The device for detecting surface defects of the optical prism film based on brightness enhancement and brightening according to claim 1, characterized in that: Two anti-wrinkle mechanisms (3) are provided, the anti-wrinkle mechanisms (3) are parallel to each other, and both anti-wrinkle mechanisms (3) are installed inside the chassis (1), and the two anti-wrinkle mechanisms (3) are arranged on both sides of the detection camera (5).

4. The device for detecting surface defects of the optical prism film based on brightness enhancement and brightening according to claim 1, characterized in that: Two cylinders (31) are provided. The cylinders (31) and the central axis (34) are coaxial. The cylinders (31) are slidably connected to the hexagonal prism (343) via a second hexagonal hole (35) provided inside the cylinders (31). The cylinders (31) are installed on both sides of the buffer mechanism (33).

5. The device for detecting surface defects of the optical prism film based on brightness enhancement and brightening according to claim 1, characterized in that: Two movable plates (331) are provided. The movable plates (331) are slidably connected to the hexagonal prism (343) via the first hexagonal hole (332). The movable plates (331) are parallel to each other. One side of the movable plate (331) on which the ball bearing (334) is installed is in close contact with the cylinder (31) via the ball bearing (334). The telescopic spring (333) is installed on the outside of the hexagonal prism (343).

6. The device for detecting surface defects of the optical prism film based on brightness enhancement according to claim 1, characterized in that: The support mechanism (7) comprises a support roller (71), both ends of the support roller (71) are fixedly connected to the movable end of the pressure sensor (72), the fixed end of the pressure sensor (72) is fixedly connected to the movable rod (73), both ends of the movable rod (73) are fixedly connected to guide rods (74), the middle of the movable rod (73) is fixedly connected to a threaded rod (710), the guide rod (74) is slidably connected to the inside of a fixed plate (77), the middle of the fixed plate (77) is fixedly connected to a drive motor (76), the top end of the main shaft of the drive motor (76) is connected to the threaded rod (710) via a connecting flange (79), a threaded hole (711) is provided inside the threaded rod (710), the threaded rod (710) is spirally connected to the threaded rod (710) via the threaded hole (711), and the upper end of one side of the fixed plate (77) is fixedly connected to a controller (75).

7. The device for detecting surface defects of the optical prism film based on brightness enhancement and brightening according to claim 6, characterized in that: The movable rod (73) and the fixed plate (77) are parallel to each other, the fixed plate (77) is welded and fixed inside the chassis (1), the movable rod (73) is slidably connected inside the chassis (1), two guide rods (74) are provided, and the guide rods (74) are parallel to each other, and the angle formed between the guide rods (74) and the fixed plate (77) is 90°.

8. The device for detecting surface defects of the optical prism film based on brightness enhancement and brightening according to claim 6, characterized in that: The fixing plate (77) comprises a fixing plate body (771), and sliding holes (772) are provided on the inner sides of both ends of the fixing plate body (771), and the guide rod (74) is slidably connected to the fixing plate body (771) through the sliding holes (772).

9. The device for detecting surface defects of the optical prism film based on brightness enhancement according to claim 6, characterized in that: The pressure sensor (72), the controller (75) and the drive motor (76) are electrically connected; the drive motor (76), the connecting column (78) and the threaded rod (710) are coaxial; the angle formed between the threaded rod (710) and the moving rod (73) is 90°; two pressure sensors (72) are provided, and the pressure sensors (72) are parallel to each other.

10. A detection method based on the device for detecting defects on the surface of a brightness enhancing optical prism film according to any one of claims 1 to 9, characterized in that: S1: Controlling the optical prism film (2) to move to a position between the detection camera (5) and the light source (9) to detect defects on the surface of the optical prism film (2): The optical prism film (2) is controlled to move inside the chassis (1) by means of the anti-wrinkle mechanism (3), the support mechanism (7) and the driving roller (6). During the movement, the defects on the surface of the optical prism film (2) are detected by means of the detection camera (5) and the light source (9); S2: The problem of wrinkles on the edge of the optical prism film (2) during the movement inside the chassis (1) is prevented by setting an anti-wrinkle mechanism (3): during the movement of the optical prism film (2) at the lower end of the anti-wrinkle mechanism (3), the threaded protrusions (32) set on the outer side of the cylinder (31) will cause the optical prism film (2) to generate a certain pulling force toward the positions on both sides of the chassis (1), thereby preventing the problem of wrinkles on the edge of the optical prism film (2) during the movement inside the chassis (1). During this process, the cylinder (31) is limited in the buffer mechanism (33), and a movable buffer is formed, which can prevent the problem of large pulling force on the optical prism film (2) causing the optical prism film (2) to be damaged; S3: During the movement of the optical prism film (2), the support mechanism (7) continuously presses the optical prism film (2) to ensure that the optical prism film (2) will not have the problem of the anti-wrinkle mechanism (3) and the driving roller (6) not being able to stick tightly. During this process, the pressure sensor (72) always maintains a set value. When the value changes, the controller (75) controls the driving motor (76) to rotate, thereby adjusting the distance of the threaded rod (710) exposed outside the connecting column (78) to adjust the value of the pressure sensor (72), thereby ensuring that the support roller (71) always contacts the optical prism film (2) with a constant force.

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