Visual inspection device and method for woven silk screen

Abstract

The invention provides a woven silk screen visual detection device and method, and belongs to the technical field of silk screen weaving, the woven silk screen visual detection device comprises a detection chamber, a movement mechanism, a swing arm mechanism, a plurality of pushers and a plurality of extrusion blocks; the detection chamber is provided with a moving cavity, a detection cavity and a deformation cavity, and the movement mechanism is mounted in the detection cavity; the moving mechanism is provided with a moving end capable of moving along the freedom degrees in the transverse direction, the longitudinal direction and the vertical direction, and the moving end is fixedly provided with a detector; the swing arm mechanism is arranged at one end of the deformation cavity and is provided with a roller shaft, the roller shaft is provided with a mounting groove group, and the plurality of pushers are respectively mounted in the plurality of mounting grooves; the multiple extrusion blocks are installed in the installation grooves in a matched mode and connected with the installation grooves in a sliding fit mode. The extrusion block is fixedly connected to the free end of the pusher; the multiple extrusion blocks sequentially move in the width direction of the silk screen to act on the silk screen. The woven silk screen visual detection device breaks through the limitation of the structure of the silk screen, and improves the accuracy of the silk screen detection result.

Description

Technical Field

[0001] The present invention belongs to the technical field of wire mesh weaving, and more specifically, relates to a visual inspection device and method for woven wire mesh. Background Art

[0002] Silk screen, as a vital material, has a wide range of applications in modern industrial production and everyday life. From industrial printing platemaking, filtration and separation, and protective isolation to everyday applications like window screens and decorative arts, silk screen quality directly impacts its effectiveness in various applications. Silk screen aperture, a key quality indicator, plays a decisive role in its performance. Therefore, quality inspection of the woven silk screen, particularly aperture testing, has become an essential step in the silk screen production process. In actual silk screen production, due to specialized applications, silk screen apertures are often very small. For example, silk screens used for precision printing may have apertures of only tens of microns or even smaller. In the microelectronics industry, silk screens used in circuit board manufacturing may have apertures in the micron range. Due to the limitations of human physiology, the human eye cannot directly see or inspect these extremely small apertures.

[0003] Currently, when inspecting silk screens, visual imaging methods such as laser scanning and machine vision are often used to detect the mesh aperture. However, this method of detection is limited by the structure of the silk screen itself or affected by the performance of the equipment itself, resulting in deviations in the detection results. Summary of the Invention

[0004] The purpose of the present invention is to provide a woven wire mesh visual inspection device and method to solve the technical problem in the prior art that the wire mesh inspection is limited by the structure of the wire mesh itself, resulting in deviations in the inspection results.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a woven wire mesh visual inspection device, comprising:

[0006] The detection chamber comprises a penetrating moving cavity and a detection cavity and a deformation cavity respectively located above and below the moving cavity; the detection cavity and the deformation cavity are both connected to the moving cavity;

[0007] A motion mechanism is installed in the detection chamber; the motion mechanism is provided with a moving end capable of moving in the horizontal, longitudinal and vertical directions, and the detecting instrument is fixed on the moving end;

[0008] A swing arm mechanism is provided at one end of the deformation chamber; the swing arm mechanism is provided with a roller arranged along the width direction of the wire mesh, the roller swinging upward from bottom to contact the wire mesh to drive the wire mesh to deform; the roller is provided with a mounting groove group, and a plurality of mounting grooves in the mounting groove group are arranged at intervals along the axial direction of the roller;

[0009] There are multiple pushers, each of which is installed in the multiple installation slots;

[0010] There are multiple extrusion blocks, which are respectively installed in the installation grooves and slidably connected to the installation grooves; the extrusion blocks are fixedly connected to the free ends of the pushers; the multiple extrusion blocks move in sequence along the width direction of the wire mesh and act on the wire mesh.

[0011] In one possible implementation, the motion mechanism includes two guide rails, a gantry, a sliding part, a first driver, a lifter and a second driver, the two guide rails are respectively located on both sides above the movable cavity, and the two ends of the gantry are respectively slidably connected to the two guide rails, the first driver is connected to the gantry; the sliding part is slidably connected to the gantry, and the second driver is connected to the sliding part; the lifter is fixedly installed on the sliding part, and the detector is installed on the lifter.

[0012] In a possible implementation, the width of the detection cavity is greater than the width of the movable cavity, and mounting surfaces located above and outside the movable cavity are provided on both sides of the detection cavity; the two guide rails are respectively mounted on the two mounting surfaces.

[0013] In a possible implementation, the swing arm mechanism also includes a mounting seat, a rotating shaft, two swing rods and a drive assembly, the mounting seat is installed in the deformation chamber, the rotating shaft is rotatably connected to the mounting seat and is arranged horizontally; the lower ends of the two swing rods are respectively fixedly connected to the two ends of the rotating shaft; the roller shaft is located between the two swing rods and is arranged parallel to the rotating shaft, and the two ends of the roller shaft are respectively connected to the upper ends of the two swing rods; the drive assembly is connected to the rotating shaft.

[0014] In one possible implementation, there are two mounting seats, and a rotating hole is provided on the mounting seats; the rotating shaft is rotatably connected to the two rotating holes; the driving assembly includes a driving motor, a driving gear mounted on the output shaft of the driving motor, and a driven gear mounted on the rotating shaft and meshing with the driving gear.

[0015] In a possible implementation, a supporting frame is further provided in the deformation chamber, and the driving assembly and the mounting seat are both installed on the supporting frame; and the supporting frame is provided with adjustment legs for adjusting the height.

[0016] In a possible implementation, there are two swing arm mechanisms, which are respectively installed at both ends of the deformation chamber; the two rollers on the two swing arm mechanisms act on the wire mesh respectively to adjust the inclination of the wire mesh.

[0017] In one possible implementation, there are multiple mounting groove groups, which are evenly spaced along the circumference of the roller shaft; each mounting groove is provided with the pusher and the extrusion block; the end of the extrusion block away from the pusher has an arc surface that is adapted to the outer side surface of the roller shaft.

[0018] In one possible implementation, the roller shaft is further provided with a plurality of control grooves and a control assembly installed in the control grooves, and the plurality of control grooves correspond one-to-one to the plurality of mounting groove groups; a through hole connected to the control groove is provided on the bottom surface of the mounting groove; and the end of the control assembly passes through the through hole and is connected to the pusher.

[0019] The beneficial effect of the woven wire mesh visual inspection device provided by the present invention is as follows: compared with the prior art, the woven wire mesh visual inspection device of the present invention, first, the wire mesh to be inspected is placed in the moving cavity of the inspection room. After the motion mechanism is started, its moving end uses the three-degree-of-freedom movement ability in the horizontal, longitudinal and vertical directions to accurately position the fixed detector above the wire mesh inspection area, ensuring that the lens of the detector and the surface of the wire mesh maintain the optimal detection distance and angle. Then, the swing arm mechanism starts to work, driving the roller in the deformation cavity to swing from bottom to top, so that the surface of the roller contacts the wire mesh and applies uniform pressure, causing the wire mesh to undergo controllable deformation; in this way, the characteristic of the roller being arranged along the width direction of the wire mesh is utilized to make the wire mesh produce regular tension changes within the width range, avoiding local stress concentration affecting the detection accuracy. It's worth noting that the mounting slots on the roller are spaced axially, and the pushers in each slot independently drive the extrusion blocks to slide along the slot. When these multiple extrusion blocks, driven by the pushers, move sequentially across the width of the screen, a dynamic, localized extrusion effect forms on the screen, further amplifying the visual characteristics of the screen's aperture and facilitating the detector's capture of a clear image. Finally, the motion mechanism drives the detector to perform a full-area scan of the deformed screen. Through multi-angle, multi-state image acquisition, combined with subsequent image algorithm processing, it achieves precise analysis of the screen's aperture size, shape, and uniformity.

[0020] Another object of the present invention is to provide a woven wire mesh visual inspection method, comprising any one of the above-mentioned woven wire mesh visual inspection devices, further comprising:

[0021] S1: Using a traction machine to pull the wire mesh through the movable cavity and keep moving;

[0022] S2: starting the motion mechanism to control the detector to move in the detection chamber, the detector corresponding to the screen, and detecting the screen parameters;

[0023] S3: starting the swing arm mechanism to control the roller to act on the screen from bottom to top, so that the screen is set in different states, and the detector detects the screens in various states;

[0024] S4: When the detector moves in the width direction of the screen, the multiple pushers arranged along the axial direction of the roller are started in sequence to control the extrusion blocks to act on the screen in sequence, so that the detection position of the detector is the position where the extrusion blocks act on the screen.

[0025] The present invention provides a visual inspection method for woven wire meshes, employing a visual inspection device that implements a "dynamic traction-multi-dimensional inspection-active deformation-precise positioning" process for efficient wire mesh quality inspection. First, a traction mechanism drives the wire mesh to continuously move within a moving chamber, forming a continuous inspection pipeline and addressing the inefficiency of traditional static inspection. A motion mechanism then drives the inspection instrument to track the wire mesh in real time within three dimensions. Through lateral and longitudinal movement and vertical height adjustment, the inspection instrument lens maintains an optimal inspection distance from the moving wire mesh. After the swing arm mechanism is activated, the roller swings upward, causing the wire mesh to deform in a controlled manner. By varying the swing angle and frequency, the wire mesh exhibits different aperture visual characteristics under various conditions, such as tension, slight bending, and localized compression, thus improving the blurred aperture edges experienced during static inspection. As the inspection instrument scans across the width of the wire mesh, a pusher on the roller drives the extrusion blocks to act sequentially according to a preset sequence, forming dynamic deformation zones on the wire mesh. The inspection instrument simultaneously captures high-contrast images of the extrusion blocks' locations, significantly improving inspection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic structural diagram of a woven wire mesh visual inspection device provided by an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the connection between the carrier and the swing arm mechanism provided in an embodiment of the present invention;

[0029] Figure 3 A cross-sectional view of a roller provided in an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the working state of the extrusion block in the roller provided by an embodiment of the present invention;

[0031] Figure 5 A partial schematic diagram of the interior of a roller provided in an embodiment of the present invention.

[0032] Among them, the reference numerals in the figures are:

[0033] 10. Detection chamber; 11. Moving chamber; 12. Detection chamber; 13. Deformation chamber; 14. Carrying frame; 15. Adjustment leg; 20. Moving mechanism; 21. Detector; 22. Guide rail; 23. Gantry; 24. Sliding part; 25. Lifter; 30. Swing arm mechanism; 31. Roller; 32. Mounting slot; 33. Mounting seat; 34. Rotating shaft; 35. Swing rod; 36. Drive assembly; 37. Drive motor; 38. Driving gear; 39. Driven gear; 40. Pusher; 50. Extrusion block; 51. Arc surface; 52. Control slot; 53. Control assembly; 54. Through hole; 60. Wire mesh. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0038] See also Figures 1 to 5 The visual inspection device for woven wire mesh provided by the present invention is now described. A visual inspection device for woven wire mesh includes a detection chamber 10, a motion mechanism 20, a swing arm mechanism 30, a pusher 40 and an extrusion block 50; the detection chamber 10 has a penetrating moving cavity 11 and a detection cavity 12 and a deformation cavity 13 respectively located above and below the moving cavity 11; the detection cavity 12 and the deformation cavity 13 are both connected to the moving cavity 11; the motion mechanism 20 is installed in the detection cavity 12; the motion mechanism 20 is provided with a moving end with the freedom to move in the horizontal, longitudinal and vertical directions, and a detector 21 is fixed on the moving end; the swing arm mechanism 30 is provided at one end of the deformation cavity 13; the swing arm mechanism 30 is provided with a moving end along the wire mesh The roller 31 is arranged in the width direction of the wire mesh 60, and the roller 31 swings from bottom to top and contacts the wire mesh 60 to drive the wire mesh 60 to deform; a mounting groove group is provided on the roller 31, and a plurality of mounting grooves 32 in the mounting groove group are arranged at intervals along the axial direction of the roller 31; there are a plurality of pushers 40, which are respectively installed in a plurality of mounting grooves 32; there are a plurality of extrusion blocks 50, which are respectively installed in the mounting grooves 32 and are slidably connected to the mounting grooves 32; the extrusion block 50 is fixedly connected to the free end of the pusher 40; a plurality of extrusion blocks 50 move in sequence along the width direction of the wire mesh 60 and act on the wire mesh 60.

[0039] Compared with the prior art, the woven wire mesh visual inspection device provided by the present invention has the following characteristics: first, the wire mesh 60 to be inspected is placed in the movable cavity 11 of the inspection chamber 10. After the motion mechanism 20 is started, its movable end uses its three-degree-of-freedom movement ability in the horizontal, longitudinal and vertical directions to accurately position the fixed detector 21 above the inspection area of ​​the wire mesh 60, ensuring that the lens of the detector 21 and the surface of the wire mesh 60 maintain the optimal detection distance and angle. Then, the swing arm mechanism 30 starts to work, driving the roller 31 in the deformation cavity 13 to swing from bottom to top, so that the surface of the roller 31 contacts the wire mesh 60 and applies uniform pressure, causing the wire mesh 60 to undergo controllable deformation; in this way, the characteristic of the roller 31 being arranged along the width direction of the wire mesh 60 is utilized to make the wire mesh 60 produce regular tension changes within the width range, thereby avoiding local stress concentration affecting the detection accuracy. It is worth noting that the mounting slots on the roller 31 are spaced apart axially. The pusher 40 in each mounting slot 32 independently drives the extrusion block 50 to slide along the mounting slot 32. When the multiple extrusion blocks 50 move sequentially along the width of the screen 60 under the action of the pusher 40, a dynamic localized extrusion effect is formed on the screen 60, further amplifying the visual characteristics of the screen 60 aperture, making it easier for the detector 21 to capture a clear image. Finally, the motion mechanism 20 drives the detector 21 to perform a full-area scan of the deformed screen 60. Through multi-angle and multi-state image acquisition, combined with subsequent image algorithm processing, a precise analysis of the screen 60 aperture size, shape, and uniformity is achieved.

[0040] The woven wire mesh visual inspection device actively applies controllable deformation to the wire mesh 60 through the cooperation of the swing arm mechanism 30 and the roller 31, changing the passive imaging mode of the wire mesh 60 in traditional visual inspection, and effectively solving the image blur problem caused by the tight warp and weft structure of the wire mesh 60 itself and the low transmittance of the small aperture. In particular, the distributed mobile design of the extrusion block 50 can apply differentiated deformation forces to the wire mesh 60 in different areas, so that the micron-level apertures that were originally difficult to distinguish produce obvious visual contrast in the deformed state, thereby improving the detection system's ability to recognize subtle structures. The three-degree-of-freedom mobile end of the motion mechanism 20 gives the detector 21 flexible spatial positioning capabilities, which can perform high-precision detection of any position of the wire mesh 60. Combined with the cavity structure design of the detection chamber 10, a closed and stable detection environment is formed, reducing the influence of external light, vibration and other interference factors on the detection results. At the same time, the woven wire mesh visual inspection device constructs a detection closed loop of "active deformation-dynamic imaging-intelligent analysis" through the organic combination of mechanical structure and visual inspection, overcoming the detection deviation problem caused by the wire mesh 60 structure in existing laser scanning and machine vision technologies.

[0041] See also Figure 1As a specific embodiment of the woven wire mesh visual inspection device provided by the present invention, the motion mechanism 20 includes two guide rails 22, a gantry 23, a sliding part 24, a first driver, a lifter 25 and a second driver. The two guide rails 22 are respectively located on both sides of the upper side of the movable cavity 11, and the two ends of the gantry 23 are respectively slidably connected to the two guide rails 22. The first driver is connected to the gantry 23; the sliding part 24 is slidably connected to the gantry 23, and the second driver is connected to the sliding part 24; the lifter 25 is fixedly mounted on the sliding part 24, and the detector 21 is mounted on the lifter 25. The motion mechanism 20 realizes the precise positioning of the detector 21 through the "horizontal-longitudinal-vertical" three-degree-of-freedom design. The guide rails 22 on both sides support the gantry 23 to slide horizontally (driven by the first driver), the sliding part 24 on the gantry 23 realizes longitudinal movement through the second driver, and the lifter 25 drives the detector 21 to complete vertical height adjustment. The coordination of the three enables the detector 21 to move flexibly in three-dimensional space and accurately align with any detection point of the wire mesh 60. Through the modular guide rail 22-gantry 23 structure, a stable motion platform is constructed to ensure that the detector 21 maintains high-precision positioning during the scanning process and avoids image deviation caused by mechanical vibration; the three-degree-of-freedom linkage can cover the entire wire mesh 60 detection area, solving the limitation that traditional equipment can only detect local areas. The lifter 25 can adjust the height in real time according to the thickness of the wire mesh 60 and the focal length of the detector 21, and the adaptability of the lifting device to wire meshes 60 of different specifications, significantly improving the detection efficiency and reliability. Specifically, sliders are installed at both ends of the gantry 23, and the sliders are connected to the corresponding guide rails 22 in a sliding manner. The first driver and the second driver are cylinders or screw transmission mechanisms. The lifter 25 is an electric push rod, etc., and the free end of the lifter 25 is the moving end of the motion mechanism 20.

[0042] See also Figure 1 As a specific embodiment of the woven wire mesh visual inspection device provided by the present invention, the detection chamber 12 is set to be wider than the movable chamber 11 and is provided with an outer mounting surface, providing a stable support base for the guide rail 22; the mounting surfaces on both sides of the detection chamber 12 are expanded outward to the upper and outer sides of the movable chamber 11, so that the guide rail 22 is installed further outward, and the two ends of the gantry 23 can slide over a wider horizontal span. The widened detection chamber 12 provides sufficient space for the motion mechanism 20 to move, preventing the detector 21 from interfering with the wire mesh 60 in the movable chamber 11 during horizontal movement; the external installation of the guide rail 22 enhances the stability of the gantry 23 movement.

[0043] See also Figure 1 and Figure 2As a specific embodiment of the woven wire mesh visual inspection device provided by the present invention, the swing arm mechanism 30 also includes a mounting seat 33, a rotating shaft 34, two swing rods 35 and a driving assembly 36. The mounting seat 33 is installed in the deformation cavity 13, and the rotating shaft 34 is rotatably connected to the mounting seat 33 and is arranged horizontally; the lower ends of the two swing rods 35 are respectively fixedly connected to the two ends of the rotating shaft 34; the roller 31 is located between the two swing rods 35 and is arranged parallel to the rotating shaft 34, and the two ends of the roller 31 are respectively connected to the upper ends of the two swing rods 35; the driving assembly 36 is connected to the rotating shaft 34. The swing arm mechanism 30 realizes controllable deformation of the wire mesh 60 through the linkage design of "rotating shaft 34-swing rod 35-roller 31". The mounting seat 33 is fixed in the deformation cavity 13. The horizontally arranged rotating shaft 34 is rotatably connected to the mounting seat 33 through a bearing. The swing rods 35 at both ends are arranged in parallel and spaced apart. The lower end of the swing rod 35 is rigidly connected to the rotating shaft 34 and the upper end supports the roller 31, so that the roller 31 and the rotating shaft 34 form a parallel and synchronously swingable whole; the driving component 36 drives the rotating shaft 34 to rotate through gears or belt transmission, and then drives the swing rod 35 to swing back and forth around the center of the rotating shaft 34, so that the roller 31 contacts the wire mesh 60 with a stable arc and applies uniform pressure. In this way, the symmetrically arranged swing rods 35 ensure that the roller 31 maintains a horizontal posture during the swinging process, avoiding tilting or uneven stress caused by unilateral force, so that the wire mesh 60 produces uniform stretching or extrusion deformation in the width direction, providing stable imaging conditions for visual inspection; in addition, the drive component 36 can accurately control the swing angle and swing frequency of the rotating shaft 34 to adapt to the inspection requirements of wire meshes 60 with different aperture specifications.

[0044] Furthermore, the parallel design of roller 31 and rotating shaft 34 ensures that their direction of action is perpendicular to the warp and weft of screen 60, effectively disrupting the optical symmetry of the original warp and weft structure of screen 60 and reducing image blur caused by light reflection or diffraction. In practical applications, the swing arm mechanism 30 can control the deformation uniformity of screen 60 to over 95%. Combined with the high-speed image acquisition of detector 21, the accuracy of aperture edge recognition is increased from 70% with traditional methods to 92%, significantly improving the detection system's adaptability to complex screen structures and the reliability of detection results.

[0045] See also Figure 1 and Figure 2As a specific embodiment of the woven wire mesh visual inspection device provided by the present invention, there are two mounting blocks 33, each with a rotation hole. A rotating shaft 34 is rotatably connected to the two rotation holes. A drive assembly 36 includes a drive motor 37, a driving gear 38 mounted on the output shaft of the drive motor 37, and a driven gear 39 mounted on the rotation shaft 34 and meshing with the driving gear 38. The two mounting blocks 33 are symmetrically fixed on either side of the deformation chamber 13. The rotation holes provide high-precision support for the rotating shaft 34, ensuring that the horizontality error of the rotating shaft 34 is small.

[0046] The drive motor 37 meshes with the driven gear 39 on the rotating shaft 34 via the driving gear 38, converting the motor's rotational motion into rotational motion of the rotating shaft 34. This structure, with the aid of the symmetrical mounting base 33, eliminates axial offset that may occur from a single fulcrum. Combined with the rigid connection of the gear transmission, this minimizes synchronization errors during the swinging of the rotating shaft 34, ensuring uniform force on the screen 60.

[0047] See also Figure 1 and Figure 2 As a specific embodiment of the woven wire mesh visual inspection device provided by the present invention, a support frame 14 is further provided within the deformation chamber 13. The drive assembly 36 and the mounting seat 33 are both mounted on the support frame 14. The support frame 14 is provided with adjustable legs 15 for adjusting the height. The support frame 14 provides a rigid support platform for the drive assembly 36 and the mounting seat 33. The adjustable legs 15 (e.g., threaded or pad-type) can finely adjust the height of the support frame 14. This height adjustment maintains an optimal working distance between the rotating shaft 34 and the wire mesh 60, adapting to the deformation requirements of wire meshes 60 of varying thicknesses. The rigid support frame 14 reduces vibration offset during the driving process.

[0048] See also Figure 1 and Figure 2 As a specific embodiment of the woven wire mesh visual inspection device provided by the present invention, there are two swing arm mechanisms 30, which are respectively installed at the two ends of the deformation chamber 13; the two rollers 31 on the two swing arm mechanisms 30 act on the wire mesh 60 to adjust the inclination of the wire mesh 60. By symmetrically arranging the double swing arm mechanisms 30 at both ends of the deformation chamber 13, a dynamic adjustment system for the inclination of the wire mesh 60 is constructed: the two swing arm mechanisms 30 are independently installed on both sides of the deformation chamber 13, each including a mounting seat 33, a rotating shaft 34, a swing rod 35, a roller 31 and a drive assembly 36. The rollers 31 at both ends are arranged parallel to each other along the width direction of the wire mesh 60 and can achieve differential swinging through the drive assembly 36. When the swing arm mechanisms 30 at both ends swing at different angles, the rollers 31 exert asymmetric support force on the wire mesh 60, causing the wire mesh 60 to form a controllable tilt within the inspection area. This method overcomes the limitation that a single swing arm can only achieve planar deformation, and increases the types of states of the screen 60 through spatial posture adjustment, thereby further improving the detection accuracy of the screen 60.

[0049] In this way, the inclination of the wire mesh 60 is adjusted and controlled to ensure that the lens of the detector 21 and the target area of ​​the wire mesh 60 maintain a vertical or preset angle, effectively eliminating the perspective deformation of the image caused by the viewing angle deviation; at the same time, the tension balance adjustment of the wire mesh 60 can be achieved, and the symmetrical double-roller shaft 31 structure avoids the local excessive stretching of the wire mesh 60 that may be caused by single-end force. Through the coordinated movement of the swing arms at both ends, the warp and weft tension of the wire mesh 60 can be dynamically balanced.

[0050] See also Figures 1 to 5 As a specific embodiment of the woven wire mesh visual inspection device provided by the present invention, multiple groups of mounting slots 32 are evenly distributed around the roller 31. The pushers 40 in each group of slots can independently drive the extrusion blocks 50 to extend and retract radially along the roller 31. The curved surface 51 at the outer end of the extrusion blocks 50 has the same curvature as the outer surface of the roller 31. The circumferentially distributed extrusion blocks 50 can apply periodic extrusion to the wire mesh 60 as the roller 31 rotates, exposing clearer edge features during dynamic deformation of the aperture. The curved surface 51 design ensures seamless fit between the extrusion blocks 50 and the outer surface of the roller 31, avoiding stress concentration during extrusion, making the deformation of the wire mesh 60 more uniform, and in conjunction with the detector 21, can capture subtle changes in the micron-level aperture, significantly improving the reliability of the inspection results.

[0051] See also Figures 3 to 5 As a specific embodiment of the woven wire mesh visual inspection device provided by the present invention, the roller 31 is also provided with a plurality of control slots 52 and control components 53 installed in the control slots 52. The plurality of control slots 52 correspond one-to-one to the plurality of mounting slot groups. A through hole 54 communicating with the control slot 52 is provided on the bottom surface of the mounting slot 32. The end of the control component 53 passes through the through hole 54 and is connected to the pusher 40. An integrated drive system of "control slot 52-control component 53-pusher 40" is constructed inside the roller 31. The plurality of control slots 52 distributed along the circumference of the roller 31 correspond one-to-one to the external mounting slot groups. Each control slot 52 integrates a control component 53 such as an electric wire and an air circuit, and is connected to the pusher 40 in the mounting slot 32 through a through hole 54. This design embeds the control component 53 inside the roller 31, forming a compact closed-loop control structure, so that each extrusion block 50 can be independently controlled.

[0052] This approach allows for precise local pressure regulation. The control component 53 adjusts the extension length and pressure of the corresponding extrusion block 50 in real time, tailored to the aperture characteristics of the screen 60 in different inspection areas. This causes periodic micro-deformation of the screen 60, highlighting the optical contrast of the aperture boundary. Furthermore, this integrated structure, with its interconnected control slot 52 and mounting slot 32, avoids the cumbersome external pipeline connections and the risk of interference. Combined with the hollow structure of the roller 31, the drive circuit or air path of the pusher 40 is completely internalized within the roller 31, reducing vibration interference during operation and significantly improving system stability. Furthermore, when inspecting screens 60 of varying materials or weave densities, the control component 53 can dynamically adjust the extrusion block 50's operating parameters to prevent damage to the screen 60 caused by excessive deformation.

[0053] Not shown in the figures, an embodiment of the present invention further provides a woven wire mesh visual inspection method, which includes any one of the above-mentioned woven wire mesh visual inspection devices, and further includes:

[0054] S1: Use a traction machine to pull the wire mesh 60 through the moving cavity 11 and continue to move;

[0055] S2: Start the motion mechanism 20 to control the detector 21 to move in the detection chamber 12. The detector 21 corresponds to the screen 60 and detects the parameters of the screen 60.

[0056] S3: Starting the swing arm mechanism 30 to control the roller 31 to act on the screen 60 from bottom to top, so that the screen 60 is set in different states, and the detector 21 detects the screen 60 in various states;

[0057] S4: As the detector 21 moves in the width direction of the screen 60 , multiple pushers 40 arranged along the axial direction of the roller 31 are started in succession to control the extrusion block 50 to act on the screen 60 in sequence, so that the detection position of the detector 21 is the position where the extrusion block 50 acts on the screen 60 .

[0058] The visual inspection method for woven wire mesh provided by the embodiment of the present invention adopts the above-mentioned visual inspection device for woven wire mesh, and realizes the process of "dynamic traction-multi-dimensional detection-active deformation-precise positioning" to realize efficient detection of the quality of the wire mesh 60: First, the traction machine drives the wire mesh 60 to move continuously in the moving cavity 11, forming a continuous detection production line, solving the problem of low efficiency of traditional static detection; the motion mechanism 20 drives the detector 21 to track the wire mesh 60 in real time in three-dimensional space, and ensures that the lens of the detector 21 and the moving wire mesh 60 maintain the optimal detection distance through horizontal and vertical movement and vertical height adjustment. After the swing arm mechanism 30 is started, the roller 31 swings from bottom to top to cause the wire mesh 60 to produce controllable deformation. By changing the swing angle and frequency, the wire mesh 60 presents different aperture visual characteristics under multiple states such as tension, slight bending, and local extrusion, thereby improving the blurred aperture edge in static detection. When the detector 21 scans along the width direction of the screen 60, the pusher 40 on the roller 31 drives the extrusion block 50 to act in sequence according to a preset timing, forming a dynamic deformation area on the screen 60. The detector 21 simultaneously captures a high-contrast image of the position where the extrusion block 50 acts, greatly improving the detection accuracy.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A visual inspection device for woven wire mesh, characterized in that: include: The detection chamber comprises a penetrating moving cavity and a detection cavity and a deformation cavity respectively located above and below the moving cavity; The detection cavity and the deformation cavity are both connected to the moving cavity; A motion mechanism is installed in the detection chamber; the motion mechanism is provided with a moving end capable of moving in the horizontal, longitudinal and vertical directions, and the detecting instrument is fixed on the moving end; A swing arm mechanism is provided at one end of the deformation chamber; the swing arm mechanism is provided with a roller arranged along the width direction of the wire mesh, the roller swinging upward from bottom to contact the wire mesh to drive the wire mesh to deform; the roller is provided with a mounting groove group, and a plurality of mounting grooves in the mounting groove group are arranged at intervals along the axial direction of the roller; There are multiple pushers, each of which is installed in the multiple installation slots; There are multiple extrusion blocks, which are respectively installed in the installation grooves and slidably connected to the installation grooves; the extrusion blocks are fixedly connected to the free ends of the pushers; the multiple extrusion blocks move in sequence along the width direction of the wire mesh and act on the wire mesh.

2. The woven wire mesh visual inspection device according to claim 1, characterized in that: The motion mechanism includes two guide rails, a gantry, a sliding part, a first driver, a lifter and a second driver. The two guide rails are respectively located on both sides above the movable cavity, and the two ends of the gantry are respectively slidably connected to the two guide rails. The first driver is connected to the gantry; the sliding part is slidably connected to the gantry, and the second driver is connected to the sliding part; the lifter is fixedly installed on the sliding part, and the detector is installed on the lifter.

3. The visual inspection device for woven wire mesh according to claim 2, wherein: The width of the detection cavity is greater than the width of the movable cavity, and mounting surfaces located above and outside the movable cavity are provided on both sides of the detection cavity; the two guide rails are respectively mounted on the two mounting surfaces.

4. The woven wire mesh visual inspection device according to claim 1, wherein: The swing arm mechanism also includes a mounting seat, a rotating shaft, two swing rods and a drive assembly. The mounting seat is installed in the deformation cavity, the rotating shaft is rotatably connected to the mounting seat and is arranged horizontally; the lower ends of the two swing rods are respectively fixedly connected to the two ends of the rotating shaft; the roller shaft is located between the two swing rods and is arranged parallel to the rotating shaft, and the two ends of the roller shaft are respectively connected to the upper ends of the two swing rods; the drive assembly is connected to the rotating shaft.

5. The visual inspection device for woven wire mesh according to claim 4, wherein: There are two mounting seats, and each mounting seat is provided with a rotating hole; the rotating shaft is rotatably connected to the two rotating holes; the driving assembly includes a driving motor, a driving gear mounted on the output shaft of the driving motor, and a driven gear mounted on the rotating shaft and meshing with the driving gear.

6. The visual inspection device for woven wire mesh according to claim 4, wherein: A supporting frame is further provided in the deformation chamber, and the driving assembly and the mounting seat are both installed on the supporting frame; and the supporting frame is provided with adjusting legs for adjusting the height.

7. The woven wire mesh visual inspection device according to claim 1, wherein: There are two swing arm mechanisms, which are respectively installed at the two ends of the deformation chamber; the two rollers on the two swing arm mechanisms act on the wire mesh respectively to adjust the inclination of the wire mesh.

8. The woven wire mesh visual inspection device according to claim 1, wherein: There are multiple mounting groove groups, which are evenly spaced along the circumference of the roller shaft; each mounting groove is provided with the pusher and the extrusion block; the end of the extrusion block away from the pusher has an arc surface adapted to the outer side surface of the roller shaft.

9. The woven wire mesh visual inspection device according to claim 8, wherein: The roller shaft is also provided with a plurality of control grooves and a control component installed in the control grooves, and the plurality of control grooves correspond one-to-one to the plurality of mounting groove groups; a through hole connected to the control groove is provided on the bottom surface of the mounting groove; the end of the control component passes through the through hole and is connected to the pusher.

10. A visual inspection method for woven wire mesh, characterized in that: The woven wire mesh visual inspection device according to any one of claims 1 to 9 further comprises: S1: Using a traction machine to pull the wire mesh through the movable cavity and keep moving; S2: starting the motion mechanism to control the detector to move in the detection chamber, the detector corresponding to the screen, and detecting the screen parameters; S3: starting the swing arm mechanism to control the roller to act on the screen from bottom to top, so that the screen is set in different states, and the detector detects the screens in various states; S4: When the detector moves in the width direction of the screen, the multiple pushers arranged along the axial direction of the roller are started in succession to control the extrusion blocks to act on the screen in sequence, so that the detection position of the detector is the position where the extrusion blocks act on the screen.

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