A nickel alloy wire mesh detection device

Abstract

The present invention discloses a nickel alloy mesh detection device, which relates to the technical field of detection and includes a detection table, a mechanical stretching module, an optical detection module and an intelligent control module installed on the top of the detection table: The mechanical stretching module includes four groups of independently controllable stretching mechanisms, and each group of stretching mechanisms includes a clamp, a translation driving component and a swing driving component; The clamp is used for clamping the edge of the mesh and transmitting a composite mechanical load, the translation driving component is used for driving the clamp to displace in the plane direction to apply an adjustable static stretching tension to the mesh, and the swing driving component is used for driving the clamp to swing periodically around the horizontal axis. With the cooperation of four groups of independent stretching mechanisms and dual-mode driving, namely translation and swing, the present invention can superimpose dynamic cyclic and stepped loads on the basis of static stretching, accurately simulate the real mechanical environment of the mesh under complex working conditions such as high-speed printing and alternating stress, and realize the full-dimensional evaluation of the fatigue resistance and creep resistance of the material.

Description

Technical Field

[0001] The present invention relates to the technical field of detection, and specifically to a detection device for nickel alloy wire mesh. Background Art

[0002] As a key filtering and supporting material in the field of precision printing, the mechanical stability and mesh hole geometric accuracy of nickel alloy wire mesh directly affect the operation reliability of equipment. Traditional detection methods mostly adopt single static tension combined with visual sampling inspection, which cannot reproduce the coupling effect of dynamic alternating load and stress relaxation in actual working conditions, resulting in large deviations in fatigue life prediction and high missed detection rates of micro defects. Especially in high-speed printing scenarios, the wire mesh needs to withstand high-frequency impacts and periodic bending vibrations of the squeegee. Traditional off-line sampling inspection methods are difficult to capture the sudden mesh hole distortion caused by dynamic damage accumulation. There is an urgent need for a full-life cycle detection device that can synchronously apply composite loads and track the defect expansion in real time. Summary of the Invention

[0003] The purpose of the present invention is to provide a detection device for nickel alloy wire mesh to solve the problems raised in the above background art.

[0004] To achieve the above invention purpose, the present invention adopts the following technical solutions:

[0005] A detection device for nickel alloy wire mesh provided by the present invention includes a detection table and a mechanical stretching module, an optical detection module, and an intelligent control module installed on the top of the detection table:

[0006] The mechanical stretching module includes four groups of independently controllable stretching mechanisms. Each stretching mechanism includes a clamp, a translation drive component, and a swing drive component. The clamp is used to hold the edge of the wire mesh and transmit the composite mechanical load. The translation drive component is used to drive the clamp to displace in the plane direction to apply adjustable static stretching tension to the wire mesh. The swing drive component is used to drive the clamp to swing periodically around the horizontal axis to superimpose dynamic cyclic stretching or stepped increasing tension on the wire mesh;

[0007] The optical detection module includes a planar light source arranged below the wire mesh, an industrial camera arranged above the wire mesh, and an image processing unit. The planar light source is used to provide uniform transmission illumination. The industrial camera is used to collect the light-transmitting image. The image processing unit calculates the gray uniformity index based on the light-transmitting distribution and identifies the mesh hole defect features;

[0008] The intelligent control module is used to regulate the displacement amount of the translation drive component and the frequency or amplitude of the swing drive component.

[0009] Further, the planar light source is installed at the central position of the inspection table. The industrial camera is movably installed on the top of the inspection table through a three-axis moving assembly. The four stretching mechanisms are distributed in a rectangular shape around the planar light source. The three-axis moving assembly includes a gantry slidably installed on the inspection table through an X-axis linear guide, a Y-axis moving seat slidably installed on the gantry through a Y-axis linear guide, and a Z-axis moving seat slidably installed on the Y-axis moving seat through a Z-axis lifting structure. The industrial camera is fixed to the bottom of the Z-axis moving seat.

[0010] Further, the translation driving assembly includes a mounting base, a sliding seat, and a screw driving structure. The mounting base is fixedly installed on the top of the inspection table. A strip-shaped groove with high straightness is formed by precision milling at the middle position of the top of the mounting base. A sliding connection structure is formed between the sliding seat and the mounting base by means of a double keyway fit. The screw driving structure is installed in the strip-shaped groove, and it includes a ball screw rotatably arranged in the strip-shaped groove, a screw block slidably assembled in the strip-shaped groove and threadedly engaged with the ball screw, and a first servo motor for driving the ball screw to rotate. The screw block is fixedly connected to the sliding seat.

[0011] Further, the swing driving assembly includes a shaft seat fixedly installed on the top of the sliding seat, a horizontal shaft rotatably installed in the shaft seat, and a swing member arranged on the horizontal shaft. Return springs are installed between both ends of the swing member and the side plates of the shaft seat. The swing driving assembly further includes a second servo motor for driving the connection of the horizontal shaft. The swing member includes a first swing body slidably engaged with the horizontal shaft through a spline structure, and a second rotating body rotatably connected to the first swing body. The fixture is connected to the second rotating body through a tension transmission device.

[0012] Further, the fixture includes a U-shaped base. The opening of the U-shaped base faces the side of the planar light source. A clamping plate that can only slide along its height direction is slidably arranged inside the U-shaped base through a guide post. A first honeycomb-shaped silica gel gasket is embedded at the bottom of the clamping plate. A second honeycomb-shaped silica gel gasket is arranged at the bottom inside the U-shaped base below the clamping plate. The fixture further includes a screw driving structure for driving the clamping plate to move.

[0013] Further, the periodic swing of the swing driving assembly includes sine wave, triangular wave, or square wave waveforms. The swing frequency ranges from 0.1 - 50 Hz, and the superposition ratio of the dynamic stretching tension and the static tension is calculated in real time by the intelligent control module, so that the total load of the mesh does not exceed 80% of its yield strength.

[0014] Further, the planar light source is a multi-spectral adjustable light source, including three band switching modes of white light, infrared, and ultraviolet. The industrial camera is equipped with a 50-million-pixel CMOS sensor and a polarization filter.

[0015] Furthermore, the intelligent control includes a module test process execution module, which is configured to sequentially execute:

[0016] Static stretching test stage: Load at a rate of 20 N / min to a calibrated tension of 50 N and maintain for 12 ± 0.5 h. During this period, trigger the light transmittance uniformity detection every 5 min.

[0017] Dynamic cyclic test stage: Superimpose a ±10 N sinusoidal fluctuating load on a reference tension of 30 N, and increase the frequency step by step from 1 Hz to 50 Hz, with each level lasting for 300 cycles.

[0018] Compared with the prior art, the above one or more technical solutions have the following beneficial effects:

[0019] 1. The four independent stretching mechanisms of the present invention cooperate with dual-mode driving (translation and swing), and can superimpose dynamic cycles and stepped loads on the basis of static stretching, accurately simulating the real mechanical environment of the mesh yarn under complex working conditions such as high-speed printing and alternating stress, and realizing the full-dimensional evaluation of the fatigue resistance and creep resistance of the material.

[0020] 2. The multi-spectral tunable light source (white light / infrared / ultraviolet) of the present invention cooperates with the polarization filter, and combines a 50 million pixel CMOS sensor to realize the fluorescence recognition of surface microcracks, the infrared transmission imaging of deep pores, and the white light detection of geometric distortion.

[0021] 3. The energy control module of the present invention actively adjusts the loading parameters through the real-time correlation analysis of the gray uniformity index and the mesh hole distortion rate, inhibits the chain expansion of defects, and ensures the safety and controllability of the test process.

[0022] 4. The three-axis moving component of the present invention covers the full-range scanning of the mesh yarn, and cooperates with the Z-axis vertical focusing to realize cross-scale imaging from the macroscopic stress distribution to local micron-level defects. Combining the analysis of the residual deformation amount rebound curve, the plastic deformation threshold of the mesh yarn is accurately quantified.

[0023] 5. The three stages of initialization calibration, composite loading, and intelligent unloading of the present invention are seamlessly connected, and a single test can complete the synchronous output of multiple indicators such as creep relaxation rate, fatigue cycle threshold, and plastic rebound rate, improving the detection efficiency.

[0024] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The attached drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0026] Figure 1It is a schematic structural diagram of the first perspective of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the second perspective of the present invention;

[0028] Figure 3 It is a schematic side view structural diagram of the present invention;

[0029] Figure 4 It is a schematic structural diagram of the first perspective of the stretching mechanism of the present invention;

[0030] Figure 5 It is a schematic structural diagram of the second perspective of the stretching mechanism of the present invention;

[0031] Figure 6 It is a schematic structural diagram of the third perspective of the stretching mechanism of the present invention.

[0032] In the figure:

[0033] 1 - Detection table; 2 - Mechanical stretching module; 21 - Stretching mechanism; 211 - Clamp; 2111 - Tensile driver; 2112 - U-shaped base; 2113 - Clamping plate; 2114 - First honeycomb-shaped silica gel gasket; 2115 - Second honeycomb-shaped silica gel gasket; 2116 - Lead screw drive structure; 212 - Translation drive assembly; 2121 - Installation base; 21211 - Strip-shaped groove; 2122 - Sliding seat; 2123 - Lead screw drive structure; 21231 - Ball screw; 21232 - Lead screw block; 21233 - First servo motor; 213 - Swing drive assembly; 2131 - Horizontal axis; 2132 - Axis seat; 2133 - Swing member; 21331 - First swing body; 21332 - Second rotating body; 2134 - Return spring; 2135 - Second servo motor; 3 - Optical detection module; 31 - Plane light source; 32 - Industrial camera; 33 - Three-axis movement assembly; 331 - Gantry; 332 - Z-axis movement seat. Detailed implementation manners

[0034] In order to enable those skilled in the art of the present technology to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0035] Please refer to Figures 1 - 6 , the present invention provides a nickel alloy wire mesh detection device, including a detection table 1 and a mechanical stretching module 2, an optical detection module 3 and an intelligent control module installed on the top of the detection table 1:

[0036] The mechanical stretching module 2 includes four groups of independently controllable stretching mechanisms 21. Each group of stretching mechanisms 21 includes a fixture 211, a translation driving component 212 and a swing driving component 213. The fixture 211 is used to clamp the edge of the mesh and transfer the composite mechanical load. The translation driving component 212 is used to drive the fixture 211 to displace in the plane direction to apply adjustable static stretching tension to the mesh. The swing driving component 213 is used to drive the fixture 211 to swing periodically around the horizontal axis 2131 to superimpose dynamic cyclic stretching or stepped increasing tension on the mesh.

[0037] The optical detection module 3 includes a planar light source 31 arranged below the mesh, an industrial camera 32 arranged above the mesh and an image processing unit. The planar light source 31 is used to provide uniform transmission illumination. The industrial camera 32 is used to collect the light-transmitting images. The image processing unit calculates the gray uniformity index based on the light-transmitting distribution and identifies the mesh hole defect features.

[0038] The intelligent control module is used to regulate the displacement of the translation driving component 212 and the frequency or amplitude of the swing driving component 213.

[0039] Based on the above settings, the device can clamp the four sides of the mesh by four groups of independent stretching mechanisms 21, and the translation driving component 212 applies adjustable static tension to the mesh to simulate the constant stretching stress in actual installation or use. At the same time, the swing driving component 213 superimposes dynamic cyclic loads or stepped increasing tension to test the anti-fatigue and anti-creep properties of the mesh. During the stretching loading process, the planar light source 31 of the optical detection module 3 cooperates with the industrial camera 32 to capture the light-transmitting images of the mesh in real time. The image processing unit calculates the gray uniformity index based on the light-transmitting distribution and identifies the mesh hole defect features, so as to comprehensively evaluate the mechanical response of the mesh under complex working conditions.

[0040] Specifically, the detection process is divided into three stages, namely the initialization and calibration stage, the composite stress loading system sub-stage and the unloading and self-checking stage.

[0041] In the initial calibration stage, the four sides of the mesh are clamped by four independent stretching mechanisms 21. The stretching mechanisms 21 slowly tighten the mesh in a micro-stepping mode, so that the mesh forms a uniformly tensioned reference plane. Subsequently, it enters the composite stress loading system in stages. In the composite stress loading system in stages, first, the translation drive component 212 gradually increases the displacement of the four-side stretching mechanism 21 according to the preset tension gradient table, so that the mesh bears a continuously increasing static tensile load. Before each stage of tension increase, the system will briefly maintain the current load and monitor the stress relaxation rate of the mesh to ensure that the material reaches a quasi-steady state before entering the next loading level. When the static tension reaches 70% of the target value, the swing drive component 213 starts to intervene. The swing drive component 213 drives the clamp 211 to swing periodically around the horizontal axis 2131 to perform cyclic stretching on the mesh and cause the mesh to vibrate, so as to simulate the coupling effect of the squeegee pressure and the screen tension in actual printing, and accurately reproduce the bending vibration and shear deformation of the mesh under high-speed printing conditions.

[0042] During the mechanical loading process, the optical detection module 3 operates in coordination throughout. The planar light source 31 projects a highly uniform transmissive light field. The industrial camera 32 automatically adjusts the magnification according to the mesh hole size and scans each frame of the preset key grid areas (such as the four corners, the center, and the stress concentration areas). The high-speed image acquisition card captures the real-time deformation characteristics of the mesh holes under the composite stress, that is, when the local structure of the mesh becomes unstable due to microscopic defects, the transmissive light field will produce characteristic gray-scale gradient changes. For example, the slip of the yarn will cause the light-transmitting area of adjacent mesh holes to increase asymmetrically, and micro-cracks will appear as linear dark spots extending along the yarn axis.

[0043] The intelligent control center is the core of the system. When the aspect ratio distortion rate of the mesh holes in a certain area suddenly accelerates, the system immediately marks this area as a high-risk area. If it detects that the uniformity exceeds the standard or the distortion chain spreads, the control module will first reduce the dynamic load frequency to slow down the damage accumulation rate, and at the same time increase the sampling rate of the industrial camera 32 to enhance the defect tracking accuracy.

[0044] After completing the composite stress loading system in stages, the device will automatically enter the unloading and self-inspection stage. The stretching mechanism 21 gradually retracts to the initial position at a controlled rate. During this process, the rebound curve and residual deformation of the mesh are continuously monitored to quantitatively evaluate the plastic deformation ability of the mesh.

[0045] Through the cooperative design of the mechanical stretching module 2, the optical detection module 3, and the intelligent control module, this device not only accurately reproduces the failure evolution path of the mesh under extreme working conditions, but also breaks through the bottleneck that traditional off-line sampling inspection cannot reflect dynamic damage accumulation with the design of active induction, precise capture, and rapid response, providing full-life-cycle technical support for the reliability verification of high-precision meshes.

[0046] In this embodiment, the planar light source 31 is installed at the central position of the detection table 1. The industrial camera 32 is movably installed on the top of the detection table 1 through a three-axis moving assembly 33. The four sets of stretching mechanisms 21 are distributed in a rectangular shape on the outer periphery of the planar light source 31. The three-axis moving assembly 33 includes a gantry 331 slidably installed on the detection table 1 through an X-axis linear guide, a Y-axis moving seat slidably installed on the gantry 331 through a Y-axis linear guide, and a Z-axis moving seat 332 slidably installed on the Y-axis moving seat through a Z-axis lifting structure. The industrial camera 32 is fixed to the bottom of the Z-axis moving seat 332.

[0047] Based on the above settings, when the four sets of stretching mechanisms 21 synchronously apply static tension, the multi-angle transmitted illumination of the central planar light source 31 can effectively eliminate the illumination difference between the edge and the central area of the mesh fabric, providing a shadow-free imaging environment for the industrial camera 32 to capture the deformation of the mesh holes. The three-axis moving assembly 33 carried by the industrial camera 32 realizes large-range horizontal scanning through the gantry 331 driven by the X-axis linear guide, and cooperates with the lateral fine-tuning of the Y-axis moving seat and the vertical focusing of the Z-axis lifting structure to form a dynamic observation ability of full-domain coverage and multi-scale focusing. It can not only quickly scan the overall tension distribution of the mesh fabric from a top-down perspective, but also capture details of local high-risk areas through vertical approximation, ensuring a complete record from the macroscopic deformation trend to the microscopic defect characteristics.

[0048] In this embodiment, the translation drive assembly 212 includes a mounting base 2121, a sliding seat 2122, and a lead screw drive structure 2123. The mounting base 2121 is fixedly installed on the top of the detection table 1. A strip-shaped groove 21211 with high straightness is formed at the middle position of the top of the mounting base 2121 through precision milling. A sliding connection structure is formed between the sliding seat 2122 and the mounting base 2121 by using a double keyway fit. The lead screw drive structure 2123 is installed in the strip-shaped groove 21211, and it includes a ball screw 21231 rotatably arranged in the strip-shaped groove 21211, a slider 21232 slidably assembled in the strip-shaped groove 21211 and threadedly engaged with the ball screw 21231, and a first servo motor 21233 for driving the rotation of the ball screw 21231. The slider 21232 is fixedly connected to the sliding seat 2122.

[0049] During detection, when a tension loading instruction is issued, the first servo motor 21233 receives the pulse signal from the intelligent control module, drives the rotation of the ball screw 21231 and converts it into the linear displacement of the slider 21232. The double keyway structure suppresses the lateral offset of the sliding seat 2122, ensuring that the sliding seat 2122 moves precisely along a single axis, driving the fixture 211 to apply a preset static tension to the mesh fabric.

[0050] In this embodiment, the swing drive assembly 213 includes a shaft seat 2132 fixedly installed on the top of the sliding seat 2122, a horizontal shaft 2131 rotatably installed in the shaft seat 2132, and a swing member 2133 arranged on the horizontal shaft 2131. A return spring 2134 is installed between both ends of the swing member 2133 and the side plates of the shaft seat 2132. The swing drive assembly 213 further includes a second servo motor 2135 for driving the connection of the horizontal shaft 2131. The swing member 2133 includes a first swing body 21331 slidably engaged with the horizontal shaft 2131 through a spline structure, and a second rotating body 21332 rotatably connected to the first swing body 21331. The clamp 211 is connected to the second rotating body 21332 through a tension transmission device 2111. After the swing drive assembly 213 is started, the second servo motor 2135 drives the horizontal shaft 2131 to rotate. The spline structure between the horizontal shaft 2131 and the first swing body 21331 not only transmits torque but also allows axial sliding, causing the first swing body 21331 to generate an angular displacement of swing around its axis when the horizontal shaft 2131 rotates, and at the same time, it can be adjusted axially adaptively to adapt to the assembly deviation between the clamp 211 and the workpiece. The second rotating body 21332 is hinged to the first swing body 21331 through a crossed roller bearing, forming an additional rotational degree of freedom, so that the clamp 211 pulled by the tension transmission device 2111 can follow a composite swing path.

[0051] In this embodiment, the clamp 211 includes a U-shaped base 2112. The opening of the U-shaped base 2112 faces the side of the planar light source 31. A clamping plate 2113 that can only slide along its height direction is slidably arranged inside the U-shaped base 2112 through a guide post. A first honeycomb-shaped silica gel gasket 2114 is inlaid at the bottom of the clamping plate 2113, and a pressure sensor is embedded in the first honeycomb-shaped silica gel gasket 2114. A second honeycomb-shaped silica gel gasket 2115 is arranged at the position corresponding to the first honeycomb-shaped silica gel gasket 2114 at the inner bottom of the U-shaped base 2112. The clamp 211 further includes a lead screw transmission structure 2116 for driving the clamping plate 2113 to move. When the clamp 211 is started, the lead screw transmission structure 2116 drives the clamping plate 2113 to press vertically along the guide post. The first honeycomb-shaped silica gel gasket 2114 and the second honeycomb-shaped silica gel gasket 2115 cooperate to clamp the mesh yarn and undergo elastic deformation, filling the mesh holes of the mesh yarn. The pressure sensor monitors the contact pressure and dynamically controls the lead screw transmission structure 2116 to adjust the feed amount of the clamping plate 2113 to achieve constant-force clamping.

[0052] In this embodiment, the periodic swing of the swing drive assembly 213 includes waveforms such as sine wave, triangular wave or square wave, the swing frequency range is 0.1 - 50 Hz, and the superposition ratio of the dynamic tensile tension and the static tension is calculated in real time by the intelligent control module, so that the total load of the mesh yarn does not exceed 80% of its yield strength.

[0053] During use, a sine wave is used to simulate continuous alternating loads under actual working conditions, a triangular wave is suitable for testing the response characteristics of the mesh fabric to linearly varying stresses, and a square wave is used to evaluate the anti-deformation ability under sudden impact loads.

[0054] The swing frequency can be adjusted within a wide range of 0.1 - 50 Hz. Among them, the low-frequency band (0.1 - 5 Hz) corresponds to the detection of material creep characteristics, the middle-frequency band (5 - 20 Hz) matches the requirements of conventional fatigue tests, and the high-frequency band (20 - 50 Hz) is used to capture the dynamic resonance critical point.

[0055] Based on the stress and strain data of the mesh fabric collected in real time, the intelligent control module ensures that the total superimposed load is accurately controlled within the 80% safety threshold of the yield strength of the mesh fabric.

[0056] In this embodiment, the planar light source 31 is a multi-spectral adjustable light source, including three band switching modes of white light, infrared, and ultraviolet. The industrial camera 32 is equipped with a 50 million pixel CMOS sensor and a polarization filter.

[0057] In the white light mode, the light source outputs a uniformly diffused collimated beam. The specular reflection on the surface of the metal mesh fabric is eliminated through a 0° polarizer, enabling the industrial camera 32 to clearly capture the geometric distortion of the grid. In the infrared mode, the light source switches to the near-infrared band. Utilizing the partial transmission characteristics of nickel alloy materials to infrared radiation, the thermal radiation signal of the pore defects inside the yarn is excited to achieve deep structure imaging. In the ultraviolet mode, the light source emits short-wave ultraviolet light, triggering the fluorescence effect of the protective coating on the surface of the mesh fabric. When there are microcracks, the crack area forms dark spots due to the fluorescence quenching effect. The background stray light interference is suppressed through a 90° polarizer, significantly enhancing the contrast of surface defects. The 50 million pixel back-illuminated CMOS sensor mounted on the industrial camera 32 improves the photosensitive area of a single pixel through 4×4 pixel binning technology, and can still maintain a reliable signal-to-noise ratio in low light environments. Combined with the hardware-level synchronous design of the rotatable polarization filter array (0°, 45°, 90°) and the light source band, the accurate separation and capture of multi-modal optical features are achieved.

[0058] In this embodiment, the intelligent control module further includes a test process execution module, which is configured to execute in sequence:

[0059] Static tensile test: Load at a rate of 20 N / min to a calibrated tension of 50 N and maintain for 12 ± 0.5 h. During this period, trigger the light transmittance uniformity detection every 5 min;

[0060] Dynamic cyclic test: Superimpose a ±10 N sine wave fluctuating load on a 30 N reference tension, and the frequency increases step by step from 1 Hz to 50 Hz, with each level lasting for 300 cycles.

[0061] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A nickel alloy wire mesh detection device, characterized in that, It includes a detection table (1), a mechanical stretching module (2), an optical detection module (3) and an intelligent control module installed on the top of the detection table (1): The mechanical stretching module (2) includes four groups of independently controllable stretching mechanisms (21). Each group of stretching mechanisms (21) includes a clamp (211), a translation drive assembly (212) and a swing drive assembly (213). The clamp (211) is used to clamp the edge of the mesh and transmit the composite mechanical load. The translation drive assembly (212) is used to drive the clamp (211) to displace in the plane direction to apply adjustable static stretching tension to the mesh. The swing drive assembly (213) is used to drive the clamp (211) to swing periodically around the horizontal axis (2131) to superimpose dynamic cyclic stretching or stepped increasing tension on the mesh; The optical detection module (3) includes a planar light source (31) arranged below the mesh, an industrial camera (32) arranged above the mesh and an image processing unit. The planar light source (31) is used to provide uniform transmissive illumination. The industrial camera (32) is used to collect the light-transmitting image. The image processing unit calculates the gray-scale uniformity index based on the light-transmitting distribution and identifies the mesh hole defect features; The intelligent control module is used to regulate the displacement of the translation drive assembly (212) and the frequency or amplitude of the swing drive assembly (213).

2. The nickel alloy mesh detection device according to claim 1, characterized in that, The planar light source (31) is installed at the central position of the detection table (1). The industrial camera (32) is movably installed on the top of the detection table (1) through a three-axis moving assembly (33). The four groups of stretching mechanisms (21) are distributed in a rectangular shape on the outer periphery of the planar light source (31). The three-axis moving assembly (33) includes a gantry (331) slidably installed on the detection table (1) through an X-axis linear guide, a Y-axis moving seat slidably installed on the gantry (331) through a Y-axis linear guide, and a Z-axis moving seat (332) slidably installed on the Y-axis moving seat through a Z-axis lifting structure. The industrial camera (32) is fixed to the bottom of the Z-axis moving seat (332).

3. The nickel alloy mesh detection device according to claim 1, characterized in that, The translation drive assembly (212) includes a mounting base (2121), a sliding seat (2122) and a lead screw drive structure (2123). The mounting base (2121) is fixedly installed on the top of the detection table (1). A strip-shaped groove (21211) with high straightness is formed at the middle position of the top of the mounting base (2121) through precision milling. A sliding connection structure is formed between the sliding seat (2122) and the mounting base (2121) by using a double keyway fit. The lead screw drive structure (2123) is installed in the strip-shaped groove (21211). It includes a ball screw (21231) rotatably arranged in the strip-shaped groove (21211), a nut block (21232) slidably assembled in the strip-shaped groove (21211) and threadedly engaged with the ball screw (21231), and a first servo motor (21233) for driving the ball screw (21231) to rotate. The nut block (21232) is fixedly connected to the sliding seat (2122).

4. The nickel alloy mesh detection device according to claim 3, characterized in that The swing drive assembly (213) includes a shaft seat (2132) fixedly mounted on the top of the sliding seat (2122), a horizontal shaft (2131) rotatably mounted in the shaft seat (2132), and a swing member (2133) disposed on the horizontal shaft (2131). Return springs (2134) are installed between both ends of the swing member (2133) and the side plates of the shaft seat (2132). The swing drive assembly (213) further includes a second servo motor (2135) for driving the connection of the horizontal shaft (2131). The swing member (2133) includes a first swing body (21331) slidably engaged with the horizontal shaft (2131) through a spline structure, and a second rotating body (21332) rotatably connected to the first swing body (21331). The clamp (211) is connected to the second rotating body (21332) through a tensile transmission (2111).

5. The nickel alloy wire mesh detection device according to claim 3, characterized in that, The clamp (211) includes a U-shaped base (2112), the opening of the U-shaped base (2112) faces the side of the planar light source (31). A clamping plate (2113) that can only slide along its height direction is slidably disposed inside the U-shaped base (2112) through a guide post. A first honeycomb silicone gasket (2114) is embedded at the bottom of the clamping plate (2113). A second honeycomb silicone gasket (2115) is disposed at the inner bottom of the U-shaped base (2112) below the clamping plate (2113). The clamp (211) further includes a lead screw transmission structure (2116) for driving the movement of the clamping plate (2113).

6. The nickel alloy wire mesh detection device according to claim 1, characterized in that, The periodic swing of the swing drive assembly (213) includes sine wave, triangular wave or square wave waveforms, the swing frequency range is 0.1 - 50 Hz, and the superposition ratio of the dynamic tensile tension and the static tension is calculated in real time by the intelligent control module, so that the total load of the mesh does not exceed 80% of its yield strength.

7. The nickel alloy wire mesh detection device according to claim 1, wherein, The planar light source (31) is a multi-spectral adjustable light source, including three band switching modes of white light, infrared and ultraviolet. The industrial camera (32) is equipped with a 50 million pixel CMOS sensor and a polarization filter.

8. The nickel alloy mesh detection device according to claim 5, characterized in that, The intelligent control includes a module test process execution module, configured to execute in sequence: Static tensile test stage: Load to a calibrated tension of 50 N at a rate of 20 N / min, and maintain for 12 ± 0.5 h. During this period, trigger the light transmission uniformity detection every 5 min. Dynamic cyclic test stage: Superimpose a ±10 N sine wave dynamic load on a reference tension of 30 N, and the frequency increases step by step from 1 Hz to 50 Hz, with each level lasting for 300 cycles.

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