Detection platform

Abstract

The present disclosure provides a detection platform, comprising a frame, a moving platform, a lifting mechanism and a slide rail arranged on the frame, the moving platform is provided with a placement station for placing a workpiece to be detected and has a horizontal moving degree of freedom, and at least one of a top lighting module, a backlight lighting module and a side lighting module; the top lighting module is arranged on the lifting mechanism and located above the placement station; the backlight lighting module is arranged on the moving platform and located below the placement station; and the side lighting module is arranged on the slide rail assembly and located at the side of the placement station; wherein the lifting mechanism is used for adjusting the height of the top lighting module, the moving platform is used for adjusting the horizontal position of the backlight lighting module, and the slide rail assembly is used for adjusting the height of the side lighting module.

Description

Technical Field

[0001] This disclosure relates to the field of testing equipment, and more particularly to a testing platform. Background Technology

[0002] In the field of industrial visual inspection, the configuration of the light source has a decisive impact on image quality and is a key foundation for feature extraction and defect identification. An ideal lighting system should effectively highlight target features and suppress background interference, thereby improving the accuracy and reliability of inspection. However, workpieces in industrial production are made of diverse materials, including metals, glass, and plastics, and their surfaces often exhibit complex characteristics such as high reflectivity, transparency, or uneven textures, resulting in significant differences in lighting requirements for different workpieces. Traditional fixed light source structures (such as rigid bracket-fixed unidirectional lighting) cannot flexibly adapt to the diversity of workpieces. Operators need to repeatedly disassemble and replace the light source hardware or manually adjust its position, resulting in a time-consuming and inaccurate debugging process, and the inability to achieve the optimal lighting angle is easily limited by structural rigidity.

[0003] In existing technologies, some solutions attempt to improve adaptability by combining multiple light sources. For example, Chinese patent CN110514662B, entitled "A Visual Inspection System with Multi-Light Source Fusion," proposes an architecture that combines multi-directional and multi-spectral light sources. However, its core still focuses on adapting to different workpieces through complex image processing and algorithms, and its hardware structure design still has obvious limitations: the light source modules are usually integrated into the inspection platform in a fixed manner, lacking independent and continuous mechanical adjustment capabilities. Utility Model Content

[0004] This disclosure provides a detection platform.

[0005] According to one aspect of this disclosure, a testing platform is provided, comprising: a frame; a movable platform, a lifting mechanism, and a slide rail assembly disposed on the frame, the movable platform having a placement station for placing a workpiece to be tested and having a horizontal degree of freedom of movement; and at least one of a top lighting module, a backlighting module, and a side lighting module; the top lighting module being disposed on the lifting mechanism and located above the placement station; the backlighting module being disposed on the movable platform and located below the placement station; and the side lighting module being disposed on the slide rail assembly and located to the side of the placement station; wherein the lifting mechanism is used to adjust the height of the top lighting module, the movable platform is used to adjust the horizontal position of the backlighting module, and the slide rail assembly is used to adjust the height of the side lighting module.

[0006] According to one aspect of the technical solution disclosed herein, the inspection platform solves the problem that traditional fixed light source structures cannot flexibly adapt to workpieces of different materials by setting up independently adjustable top lighting modules, backlighting modules, and side lighting modules. In use, operators can selectively use the corresponding lighting modules according to the material characteristics of the workpiece under test, and adjust the position of each lighting module separately through the lifting mechanism, moving platform, and slide rail assembly. For example, for highly reflective metal workpieces, the side lighting module can be mainly used and its height adjusted to reduce glare; for transparent glass workpieces, the backlighting module can be mainly used and its angle adjusted to highlight internal defects; for plastic workpieces with complex surface textures, multiple lighting modules can be used simultaneously and their relative positions precisely adjusted to obtain the best imaging effect. This flexible hardware structure allows operators to quickly configure the lighting without repeatedly disassembling or replacing the light source hardware, improving debugging efficiency and ensuring the stability of image quality. It overcomes the shortcomings of existing technologies where the light source modules are fixedly integrated and lack independent, continuous mechanical adjustment capabilities.

[0007] According to at least one embodiment of the detection platform of this disclosure, the lifting mechanism includes a lead screw module, the lead screw module including a lead screw and two slides; the lead screw is vertically arranged; the two slides are threadedly connected to the lead screw; the slides are used to mount an industrial camera and / or a top lighting module.

[0008] In this embodiment, the lead screw module provides continuous height adjustment capability for both the top lighting module and the industrial camera. The threaded transmission characteristics of the lead screw enable the slide table to achieve smooth, stepless height adjustment, avoiding the discontinuous adjustment problems caused by traditional fixed brackets or preset hole positions. Two slide tables can meet the installation height requirements of various industrial cameras, or the industrial camera and top lighting module can be installed separately, allowing the industrial camera and top lighting module to be used simultaneously and move in synergy, achieving better imaging results.

[0009] According to at least one embodiment of the detection platform of the present disclosure, at least one of the slides is detachably disposed on the lead screw.

[0010] In the technical solution of this embodiment, operators can quickly replace different types of slides or adjust their positions according to actual needs without replacing the entire lead screw module. For example, when it is necessary to adjust the distance between two slides, one slide can be removed first and reinstalled in a suitable position, thus meeting the installation height requirements of the industrial camera and the distance requirements between the industrial camera and the top lighting module. At the same time, removing part of the slides can increase the height movement range of the industrial camera mounted on other slides, thereby accommodating industrial cameras with longer lenses.

[0011] According to at least one embodiment of the detection platform of this disclosure, the mobile platform is a UVW platform with horizontal and rotational degrees of freedom.

[0012] In this embodiment, the three degrees of freedom of the UVW platform (translation in the U and V directions and rotation in the W direction) allow the operator to finely adjust the position and angle of the workpiece and the backlight module. For workpieces with different characteristics, such as transparent materials requiring specific angle lighting or workpieces with complex surface textures, the UVW platform can provide more flexible adjustment schemes, thereby obtaining clearer image features.

[0013] According to at least one embodiment of the detection platform of this disclosure, the UVW platform includes an optical flat plate, the optical flat plate being provided with the placement station and used to install the backlight illumination module.

[0014] In the technical solution of this embodiment, the optical flat plate serves as the upper surface of the UVW platform, providing a flat and stable foundation for placing workpieces and a backlighting mounting platform.

[0015] According to at least one embodiment of the detection platform of this disclosure, the slide rail assembly includes a slide rail, a slider, a fastener, and a locking member. The slider is connected to the slide rail, the fastener is used to fix the slider to the slide rail, and the locking member is used to fix the side lighting module to the slider.

[0016] In this embodiment, the operator first loosens the fasteners, allowing the slider to slide freely on the slide rail to the desired height. After determining the height, the slider is fixed to the slide rail using the fasteners. Finally, the side lighting module is fixed to the slider using locking devices. This step-by-step adjustment mechanism makes adjusting the side lighting height simple and intuitive, avoiding the problems of traditional fixed structures that require disassembling the bracket or relying on limited preset hole positions.

[0017] According to at least one embodiment of the detection platform of this disclosure, the slider is fixedly provided with an L-shaped bracket, the locking member is a bolt, one end of the side lighting module is provided on the L-shaped bracket, and is fixed to the inner side of the L-shaped bracket by the locking member.

[0018] In this embodiment, bolts serve as locking components, making the fixing and loosening of the side lighting module easier. The design of mounting the side lighting module inside the L-shaped bracket not only improves the overall rigidity of the structure but also protects one end of the side lighting module from external interference.

[0019] According to at least one embodiment of the present disclosure, the detection platform includes a camera mounted on the lifting mechanism, and the top lighting module includes a ring light source and / or a bowl-shaped light source, which are fixed to the outer periphery of the camera by threads or bayonet.

[0020] In the technical solution of this embodiment, the camera and the top lighting module are integrated on the same lifting mechanism to ensure that their relative positions remain unchanged during height adjustment and to maintain the imaging distance.

[0021] According to at least one embodiment of the detection platform of this disclosure, the backlighting module includes an upper plate, a lower plate, and a planar light source; the upper plate and the lower plate are made of transparent material and are fixedly connected; the planar light source is fixed between the upper plate and the lower plate.

[0022] In the technical solution of this embodiment, the transparent upper and lower plates reduce the influence of the external environment on the internal planar light source, and also provide a flat and uniform light-transmitting surface to ensure the uniformity and stability of the backlight illumination.

[0023] According to at least one embodiment of the detection platform of this disclosure, the lower plate is provided with a plurality of elongated mounting holes, the plurality of mounting holes are centrally symmetrically distributed, and include a central hole group located in the middle of the lower plate and a peripheral hole group located around the central hole group; by selecting different mounting holes and adjusting the locking position of the bolts, planar light sources of different shapes and sizes can be fixed.

[0024] In this embodiment, the central hole group is suitable for installing and fixing small planar light sources, while the peripheral hole group provides sufficient installation range for large planar light sources. The elongated hole design allows bolts to be tightened at any position within the hole, achieving continuous adjustment of the installation position, rather than the discrete fixing of traditional circular holes. When it is necessary to replace planar light sources of different sizes, the operator only needs to select the appropriate central hole group or peripheral hole group according to the shape of the light source, and place the bolt in the appropriate position within the elongated hole to complete the installation. Attached Figure Description

[0025] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0026] Figure 1 This is a schematic diagram of the backlighting module of a testing platform according to one embodiment of the present disclosure.

[0027] Figure 2 This is a schematic diagram of the structure of a detection platform with a side lighting module according to one embodiment of the present disclosure.

[0028] Figure 3 This is a front structural schematic diagram of a testing platform according to one embodiment of the present disclosure.

[0029] Figure 4 This is a side view of a testing platform according to one embodiment of the present disclosure.

[0030] Figure 5 This is a top view of a testing platform according to one embodiment of the present disclosure.

[0031] Figure 6 This is a schematic diagram of the degrees of freedom of a UVW platform according to one embodiment of the present disclosure.

[0032] Figure 7 This is a schematic diagram of the structure of a lead screw module according to one embodiment of the present disclosure.

[0033] Figure 8 This is a structural schematic diagram of a slide rail assembly and a side lighting module according to one embodiment of the present disclosure.

[0034] Figure 9 This is a schematic diagram of the connection structure of a side lighting module according to one embodiment of the present disclosure.

[0035] Figure 10 This is a schematic diagram of the structure of a ring light source according to one embodiment of the present disclosure.

[0036] Figure 11 This is a schematic diagram of the structure of a bowl-shaped light source according to one embodiment of the present disclosure.

[0037] Figure 12 This is a structural schematic diagram of a mobile platform and a backlight module according to one embodiment of the present disclosure.

[0038] Figure 13 This is a schematic diagram of the structure of a backlighting module according to one embodiment of the present disclosure.

[0039] Figure 14 This is a schematic diagram of the structure of the lower plate according to one embodiment of the present disclosure.

[0040] Explanation of reference numerals in the attached figures: 100 Frames 200 mobile platforms 210 Optical Flat Panel 300 Lifting Mechanism 310 Screw Module 311 lead screw 312 Slide 400 slide rail assembly 410 Slider 420 Fasteners 430 Locking component 440 L-shaped bracket 450 slide rail 500 Top Lighting Module 510 Ring Light Source 520 Bowl-shaped light source 600 Backlight Module 610 board 620 lower plate 621 mounting holes 630 Plane Light Source 700 Side Lighting Module 710 bar light source 800 Industrial Camera 900 PLC controller. Detailed Implementation

[0041] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0042] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. The technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] Unless otherwise stated, the exemplary implementations / embodiments shown are to be understood as providing exemplary features of various details that provide ways in which the technical concepts of this disclosure can be implemented in practice. Therefore, unless otherwise stated, the features of various implementations / embodiments may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concepts of this disclosure.

[0044] In existing technologies, some inspection platforms attempt to improve adaptability through multi-light source combinations, but their core focus remains on adapting to different workpieces through complex image processing and algorithms. Their hardware structure design still has significant limitations: the light source modules are typically integrated into the inspection platform in a fixed manner, lacking independent and continuous mechanical adjustment capabilities.

[0045] This embodiment provides a detection platform.

[0046] Figure 1 This is a schematic diagram of the backlighting module of a testing platform according to one embodiment of the present disclosure. Figure 2This is a schematic diagram of the structure of a detection platform with a side lighting module according to one embodiment of the present disclosure.

[0047] See Figure 1 and Figure 2 The detection platform in this embodiment includes: a frame 100, a moving platform 200, a lifting mechanism 300, a slide rail assembly 400, and a lighting module. The lighting module may be at least one of a top lighting module 500, a backlighting module 600, and a side lighting module 700.

[0048] The frame 100 serves as the mounting base for the mobile platform 200, lifting mechanism 300, and slide rail assembly 400, and is used to integrate other components of the testing platform. The mobile platform 200, lifting mechanism 300, and slide rail assembly 400 are mounted on the frame 100.

[0049] The mobile platform 200 is equipped with a placement station for placing the workpiece to be tested and has a horizontal degree of freedom of movement.

[0050] Figure 3 This is a front structural schematic diagram of a testing platform according to one embodiment of the present disclosure.

[0051] like Figure 3 As shown, the top lighting module 500 is mounted on the lifting mechanism 300 and located above the placement station, for illuminating the workpiece from above.

[0052] like Figure 1 As shown, the backlight module 600 is mounted on the mobile platform 200 and located below the placement station to provide backlight for the workpiece to be tested.

[0053] like Figure 2 As shown, the side lighting module 700 is mounted on the slide rail assembly and located on the side of the placement station to provide side lighting for the workpiece to be tested.

[0054] The lifting mechanism 300 is used to adjust the height of the top lighting module 500. The moving platform 200 is used to adjust the horizontal position of the backlighting module 600. The slide rail assembly 400 is used to adjust the height of the side lighting module 700.

[0055] The above technical solution's testing platform, by incorporating independently adjustable top lighting module 500, backlighting module 600, and side lighting module 700, solves the problem of traditional fixed light source structures being unable to flexibly adapt to workpieces of different materials. During use, operators can selectively use the appropriate lighting modules based on the material characteristics of the workpiece being tested, and adjust the position of each lighting module using the lifting mechanism 300, moving platform 200, and slide rail assembly 400. For example, for highly reflective metal workpieces, the side lighting module 700 can be primarily used and its height adjusted to reduce glare; for transparent glass workpieces, the backlighting module 600 can be primarily used and its angle adjusted to highlight internal defects; for plastic workpieces with complex surface textures, multiple lighting modules can be used simultaneously and their relative positions precisely adjusted to obtain the best imaging effect.

[0056] Figure 6 This is a schematic diagram of the degrees of freedom of a UVW platform according to one embodiment of the present disclosure.

[0057] See Figure 6 In some embodiments, the mobile platform 200 is a UVW platform with horizontal translation and rotational degrees of freedom. For example, an existing high-precision platform is selected for UVW platform, which can be used for algorithm accuracy verification. The name UVW platform comes from its three degrees of freedom: U and V directions: representing two mutually perpendicular translational movements (X-axis and Y-axis) in the horizontal plane. W direction: representing rotational movement about a vertical axis (θz-axis). The core function of the UVW platform is to adjust the position and angle of the workpiece to be tested placed on the platform and the backlight module 600 mounted on it. For example, the UVW platform has a maximum displacement stroke of 5mm, an accuracy of ±2.5μm, a maximum rotation amplitude of 2.5°, and an accuracy of ±7s, and can be used for algorithm accuracy verification and teaching demonstrations. The UVW platform is controlled by a PLC, and translation or rotation commands can be issued from a PC.

[0058] Figure 4 This is a side view of a testing platform according to one embodiment of the present disclosure. Figure 5 This is a top view of a testing platform according to one embodiment of the present disclosure.

[0059] like Figure 4 and Figure 5 As shown, the UVW platform further includes an optical flat plate 210, which has a placement station for mounting a backlighting module 600. For example, a 300mm x 300mm optical flat plate 210 is mounted above the UVW platform, which can be used to directly place workpieces or mount the backlighting module 600.

[0060] Figure 7 This is a schematic diagram of the structure of a lead screw module according to one embodiment of the present disclosure.

[0061] See Figure 3 and Figure 7 In one embodiment of the lifting mechanism 300 described above, the lifting mechanism 300 includes a lead screw module 310. The lead screw module 310 includes a lead screw 311 and two slides 312. The lead screw 311 is vertically arranged, and the two slides 312 are threadedly connected to the lead screw 311. The slides 312 are used to mount an industrial camera 800 and / or a top lighting module 500. The lead screw module 310 provides continuous height adjustment capability for the top lighting module 500 and the industrial camera 800. The threaded transmission characteristics of the lead screw 311 enable the slides 312 to achieve smooth, stepless height adjustment, avoiding the discontinuous adjustment problems caused by traditional fixed brackets or preset hole positions. The two slides 312 can meet the installation height requirements of various industrial cameras 800, or can separately mount the industrial camera 800 and the top lighting module 500, allowing the industrial camera 800 and the top lighting module 500 to be used simultaneously and move in coordination, achieving better imaging results.

[0062] The inspection platform includes an industrial camera 800, which is fixed on a slide table 312. The industrial camera 800 serves as an image acquisition module for capturing images of the workpiece. The slide table 312 can be adapted to different types and models of industrial cameras 800 by installing various adapter accessories.

[0063] See Figure 3 As shown, the detection platform includes a PLC controller 900, which is electrically connected to the UVW platform. The PLC controller 900, or Programmable Logic Controller, coordinates the translational and rotational movements of the UVW platform and can also control the operation of various light source modules. The PLC controller 900 collaboratively verifies the accuracy of the vision algorithm. The PC sends a z-axis movement command to the PLC controller 900, which then controls the lifting mechanism 300 to move in the z-axis direction, coordinating the movement of the industrial camera 800 and any potentially used top lighting module 500, and adjusting the height of the industrial camera 800 and top lighting module 500.

[0064] Furthermore, at least one slide 312 is detachably mounted on the lead screw 311, meaning it can be removed from the lead screw 311 and reinstalled. Operators can quickly replace different types of slides 312 or adjust their positions as needed without replacing the entire lead screw module 310. For example, when adjusting the distance between two slides 312, one slide 312 can be removed and reinstalled in the appropriate position, thus meeting the installation height requirements of the industrial camera 800 and the distance requirements between the industrial camera 800 and the top lighting module 500. Simultaneously, removing some slides 312 increases the height movement range of the industrial camera 800 mounted on other slides 312, thereby accommodating industrial cameras 800 with longer lenses.

[0065] Figure 8 This is a structural schematic diagram of a slide rail assembly and a side lighting module according to one embodiment of the present disclosure. Figure 9 This is a schematic diagram of the connection structure of a side lighting module according to one embodiment of the present disclosure.

[0066] See Figure 8 and Figure 9 In one embodiment where the side lighting module 700 is mounted on the slide rail assembly, the side lighting module 700 includes a strip light source 710. The slide rail assembly 400 includes a slider 410, a fastener 420, a locking member 430, and a slide rail 450. The slider 410 is connected to the slide rail 450 and its position on the slide rail 450 can be adjusted before being fixed. The fastener 420 is used to fix the slider 410 to the slide rail 450, thus fixing the position of the slider 410. The locking member 430 is used to fix the side lighting module 700 to the slider 410. During installation, the operator first loosens the fastener 420, allowing the slider 410 to slide freely on the slide rail 450 to the desired height. After determining the height, the slider 410 is fixed to the slide rail 450 using the fastener 420. Finally, the locking member 430 is used to fix the side lighting module 700 to the slider 410.

[0067] like Figure 9 As shown, exemplarily, the slider 410 is fixedly mounted with an L-shaped bracket 440, such as by bolts. The locking member 430 is a bolt and is equipped with a quick-release handle. One end of the side lighting module 700 is disposed in the L-shaped bracket 440 and has a threaded hole. The locking member 430 connects to the threaded hole, fixing one end of the side lighting module 700 to the inside of the L-shaped bracket 440. The quick-release handle, combined with the bolt, makes fixing and loosening the side lighting module 700 easier and can be done without additional tools. The design of the side lighting module 700 being installed inside the L-shaped bracket 440 not only improves the overall rigidity of the structure but also protects one end of the side lighting module 700 from external interference.

[0068] For example, fastener 420 is one of bolts, clamps, or tightening parts, and may be fitted with a handle to make fastener 420 easier to operate.

[0069] Figure 10 This is a schematic diagram of the structure of a ring light source according to one embodiment of the present disclosure. Figure 11 This is a schematic diagram of the structure of a bowl-shaped light source according to one embodiment of the present disclosure.

[0070] like Figure 10 and Figure 11 As shown, in some embodiments, the top illumination module 500 includes a ring light source 510 and / or a bowl-shaped light source 520. The ring light source 510 and the bowl-shaped light source 520 are fixed to the outer periphery of the camera via threads or bayonet mounting, such as to the outer periphery of the camera lens. The ring light source 510 provides uniform coaxial illumination, suitable for surface defect detection of planar workpieces. The bowl-shaped light source 520 provides diffuse illumination, particularly suitable for detecting workpieces made of highly reflective materials, effectively reducing specular reflection interference. Operators can quickly change different types of top light sources using the threaded or bayonet connection method without the use of tools.

[0071] Figure 12 This is a structural schematic diagram of a mobile platform and a backlight module according to one embodiment of the present disclosure. Figure 13 This is a schematic diagram of the structure of a backlighting module according to one embodiment of the present disclosure.

[0072] like Figure 12 and Figure 13 As shown, in one embodiment of the backlight module 600, the backlight module 600 includes an upper plate 610, a lower plate 620, and a planar light source 630. The upper plate 610 and the lower plate 620 are made of transparent material and are fixedly connected to each other. The planar light source 630 is fixed between the upper plate 610 and the lower plate 620. For example, the backlight module 600 is located above the UVW platform and uses an M6... Supported by 30mm + 8 hexagonal columns. Both upper and lower panels are made of transparent, wear-resistant acrylic material. The transparent upper panel 610 and lower panel 620 reduce the influence of the external environment on the internal planar light source 630, and also provide a flat and uniform light-transmitting surface, ensuring the uniformity and stability of backlighting.

[0073] Figure 12 This is a schematic diagram of the structure of the lower plate according to one embodiment of the present disclosure.

[0074] like Figure 12 and Figure 14As shown, the lower plate 620 is provided with multiple elongated mounting holes 621, which are centrally symmetrically distributed and include a central hole group located in the middle of the lower plate 620 and a peripheral hole group located around the central hole group. By selecting different mounting holes 621 and adjusting the locking position of the bolts, planar light sources 630 of different sizes can be fixed. The central hole group is suitable for installing and fixing small planar light sources 630, while the peripheral hole group provides sufficient installation range for large planar light sources 630. The design of the elongated holes allows the bolts to be locked at any position within the holes, achieving continuous adjustment of the installation position, rather than the discrete fixing of traditional circular holes. When it is necessary to replace a planar light source 630 of a different size, the operator only needs to select the appropriate central hole group or peripheral hole group according to the shape of the light source and place the bolt in the appropriate position within the elongated hole to complete the installation.

[0075] The collaborative control process of the inspection platform for the above technical solution is as follows: Initial setup: The user selects or inputs the material type of the workpiece to be inspected (e.g., metal, glass, plastic) through the HMI interface. Rule retrieval: Based on the material information, the PLC retrieves the corresponding optimal light source combination, initial brightness, and angle parameters from the preset light source rule library. Position feedback and dynamic adjustment: When the UVW platform moves the workpiece, its built-in high-precision encoder provides real-time feedback on the workpiece's current position coordinates. The PLC can fine-tune the angle of the strip light based on the position information to ensure that the illumination always covers the inspection area at the optimal angle throughout the entire movement process. Image verification and iteration: The camera acquires images, and the software evaluates the feature sharpness. If the expected results are not met, a fine-tuning command can be triggered to further optimize the light source parameters.

[0076] In some embodiments, the inspection platform can be applied to educational demonstration scenarios. Regarding its educational demonstration function, the platform transforms abstract optical principles and imaging theories into visualized experiments through its modular multi-light source system and control software. Students and researchers can independently select and combine the side illumination module 700, the top illumination module 500 of the ring light source 510, the top illumination module 500 of the bowl-shaped light source 520, and the backlight module 600 to observe in real time the differences in imaging effects of the same workpiece under different lighting conditions. The industrial camera 800 system provides real-time imaging, displaying the differences in image effects of the same workpiece under different combined lighting conditions, enabling learners to clearly observe the ability of different light source types to represent specific features, such as the highlighting of scratches, the emphasis of textures, the clarity of characters, and the sharpness of contours. Visualizing the crucial role of lighting design in machine vision systems helps students fundamentally understand the importance of light source selection.

[0077] Furthermore, the detection platform supports quantitative demonstrations of factors influencing algorithm performance. By changing only the illumination conditions of the light source under identical visual algorithm parameter settings, the system automatically records and analyzes the changes in performance indicators of the algorithm under different lighting conditions, such as detection accuracy, repeatability, and stability. This function helps students establish a holistic cognitive chain from lighting conditions to image quality and then to algorithm performance, forming a system-level engineering understanding. In addition, leveraging the high-precision displacement and rotation capabilities of the ultraviolet alignment platform, instructors can precisely control the workpiece to complete micrometer-level movement or second-level rotation, demonstrating in real time the impact of precision motion on image quality, enabling students to deeply understand the important role of the platform's mechanical stability in visual inspection results.

[0078] In terms of algorithm accuracy verification, this testing platform provides vision algorithm engineers and researchers with a stable, reliable, and quantifiable testing environment, capable of accurately evaluating the true performance limits of various vision algorithms. Its core value lies in providing highly repeatable and consistent benchmark testing conditions. During algorithm comparison testing, the system uses a high-precision encoder on the ultraviolet alignment platform to provide real-time feedback on the workpiece's position and orientation information. Combined with a closed-loop control mechanism, it ensures that the workpiece's position, illumination parameters, and even environmental conditions are completely consistent in each test, effectively eliminating testing errors caused by hardware fluctuations. This ensures that differences in algorithm performance stem entirely from variations in the algorithm itself, making the evaluation results highly credible and comparable.

[0079] This embodiment focuses on the accuracy comparison and verification of visual algorithms and their teaching demonstration. The scenario is set in a university machine vision course, aiming to demonstrate the impact of different light sources on algorithm performance. Simultaneously, this embodiment quantitatively evaluates the accuracy limits of edge detection algorithms developed by students, primarily applied to experimental teaching and algorithm development verification in machine vision courses. In practice, the teacher first selects a standard calibration plate containing lines and rings of known precise dimensions as the workpiece to be measured through the HMI interface. Then, the system automatically calls different preset light source combinations sequentially, including using only the ring light top illumination module 500, switching to ring light combined with side strip light illumination modules, and using a bowl-shaped light source 520 top illumination module 500. Under each illumination condition, the UVW platform precisely moves the calibration plate, controlling its movement in the X / Y directions by ±2.5μm and ±5μm respectively, and controls the calibration plate to rotate precisely for ±10 seconds and ±20 seconds via a rotation platform. Subsequently, the industrial camera 800 acquires images at each position, and the edge detection algorithm developed by the student processes the images, measuring the line width and ring diameter. The system automatically compares the algorithm measurement results with the actual displacement values ​​fed back by the UVW platform encoder and the standard dimensions of the calibration plate, generating an accuracy comparison report. Finally, the image effects under the three illumination conditions, the edge contour maps extracted by the algorithm, and the accuracy report are displayed side-by-side on a large display screen. This embodiment demonstrates significant effectiveness, visualizing the impact of different illumination conditions on image quality and feature extraction results, and verifying the accuracy of different visual algorithms. Students were able to visually observe the significant impact of different lighting conditions on image quality and feature extraction performance. Quantitative analysis revealed that the algorithm achieved the highest repeatability accuracy (±0.5 pixels) under a combination of ring and strip light sources, deeply understanding the importance of lighting optimization. Simultaneously, the platform provided objective verification that the algorithm's accuracy reached ±2.5μm, providing a quantitative basis for its performance.

[0080] The testing platform based on the above technical solutions can be applied to the detection of surface scratches on semiconductor wafers. Specifically applied to the post-processing quality inspection in semiconductor manufacturing. The implementation process is as follows: First, the control system activates the top illumination module 500 of the ring light source 510 to provide uniform overall illumination, while simultaneously activating the side illumination modules 700 of the low-angle strip light sources 710 on both sides to highlight scratch shadows. Then, the UVW platform moves the wafer placed on the workstation for scanning, with the angle of the strip light dynamically adjusted according to the position to ensure that scratches are clearly highlighted by the low-angle light at any location. Finally, the industrial camera 800 acquires high-contrast images, and micron-level scratches can be easily identified by software. Compared to traditional single light sources, the application of this inspection platform significantly improves the scratch detection rate and reduces the false detection rate.

[0081] Crucially, this testing platform possesses the ability to quantify the limits of algorithm accuracy. By controlling the workpiece to perform micron-level single-step displacement via a moving platform 200 (such as an ultraviolet alignment platform), and simultaneously running the algorithm under test for real-time measurement, the system can automatically compare the algorithm's output with the actual displacement data fed back by the platform's encoder. This allows for the statistical analysis of key indicators such as repeatability accuracy, linearity error, and stability. This process accurately answers the core question of measurement accuracy in practical applications, providing a clear direction for algorithm optimization. Furthermore, the testing platform can be used to evaluate the robustness of algorithms. By actively introducing controllable disturbances, such as simulating minute workpiece offsets or tilts using an ultraviolet alignment platform, the platform can test the algorithm's tolerance to positional fluctuations. Adjusting the light source controller can simulate changes in light intensity, testing the algorithm's adaptability under different lighting conditions. Rapidly switching between different light source combinations can also verify the algorithm's performance in multiple lighting schemes. These functions comprehensively support the stability assessment of algorithms under non-ideal conditions, providing solid data support and decision-making basis for the algorithm's final industrial application.

[0082] The detection platform based on the above technical solution offers the following advantages: First, the targeted multi-source collaborative illumination scheme effectively suppresses reflections and enhances defect contrast, providing high-quality, consistent input images for visual algorithms. This is expected to improve image feature extraction stability by over 30%, increasing detection accuracy and reliability, and providing a reliable hardware foundation for algorithm accuracy verification, thereby enhancing detection accuracy and stability. Second, the modular light source system supports rapid replacement and combination, allowing students to intuitively compare the imaging effects of different lighting conditions, gain a deeper understanding of the impact of light sources on visual algorithm performance, reduce experimental preparation time by 70%, and support the rapid setup of various experimental scenarios, greatly improving the teaching efficiency of visual algorithms and enhancing both teaching efficiency and experimental flexibility. Third, the optimized multi-source lighting effect reduces reliance on high-resolution cameras, allowing for the use of more cost-effective camera solutions to achieve experiments of equivalent precision. This also reduces the use of complex image processing algorithms, allowing the teaching focus to return to understanding the characteristics of light sources and the fundamental principles of algorithms, reducing laboratory construction and operation costs, and lowering teaching and research costs. Equally important, the modular design allows for the easy addition of new light source modules (such as ultraviolet, polarized light, structured light, etc.) to meet teaching and research needs. The testing platform can be used for industrial vision inspection algorithm verification as well as as a professional vision lighting teaching platform, achieving multi-purpose functionality, effectively protecting investment and supporting future technology upgrades, and enhancing the platform's scalability. Finally, the testing platform transforms abstract light source design principles into intuitively operable experimental modules, helping students establish a complete cognitive chain of light source-imaging-algorithm performance. This fills the gap in hardware practice in traditional vision algorithm teaching, promotes the effective integration of theoretical knowledge and engineering practice, and achieves a deep fusion of theory and practice.

[0083] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0084] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A detection platform, characterized in that, include: frame; A mobile platform is provided on the frame, the mobile platform is provided with a placement station for placing the workpiece to be tested, and has a horizontal degree of freedom of movement; Lifting mechanism; Slide rail assembly; as well as The system includes a top lighting module, a backlighting module, and a side lighting module. The top lighting module is located above the placement station on the lifting mechanism; the backlighting module is located below the placement station on the moving platform; and the side lighting module is located to the side of the placement station on the slide rail assembly. The lifting mechanism is used to adjust the height of the top lighting module, the moving platform is used to adjust the horizontal position of the backlight lighting module, and the slide rail assembly is used to adjust the height of the side lighting module.

2. The detection platform according to claim 1, characterized in that, The lifting mechanism includes a lead screw module, which includes a lead screw and two slides. The lead screw is vertically arranged, and the two slides are threadedly connected to the lead screw. The slides are used to mount industrial cameras and / or top lighting modules.

3. The detection platform according to claim 2, characterized in that, At least one of the slides is detachably mounted on the lead screw.

4. The detection platform according to claim 1, characterized in that, The mobile platform is a UVW platform with horizontal and rotational degrees of freedom.

5. The detection platform according to claim 4, characterized in that, The UVW platform includes an optical flat plate, which is provided with the placement station and is used to install the backlight illumination module.

6. The detection platform according to claim 1, characterized in that, The slide rail assembly includes a slide rail, a slider, fasteners, and locking components. The slider is connected to the slide rail, the fasteners are used to fix the slider to the slide rail, and the locking components are used to fix the side lighting module to the slider.

7. The detection platform according to claim 6, characterized in that, The slider is fixedly mounted on an L-shaped bracket, the locking element is a bolt, one end of the side lighting module is mounted on the L-shaped bracket, and is fixed to the inside of the L-shaped bracket by the locking element.

8. The detection platform according to claim 1, characterized in that, The detection platform includes a camera installed on the lifting mechanism, and the top lighting module includes a ring light source and a bowl-shaped light source, which are fixed to the outer periphery of the camera by threads or bayonet.

9. The detection platform according to claim 1, characterized in that, The backlight module includes an upper plate, a lower plate, and a planar light source. The upper plate and the lower plate are made of transparent material and are fixedly connected. The planar light source is fixed between the upper plate and the lower plate.

10. The detection platform according to claim 9, characterized in that, The lower plate is provided with multiple elongated mounting holes, which are centrally symmetrically distributed and include a central hole group located in the middle of the lower plate and a peripheral hole group located around the central hole group. By selecting different mounting holes and adjusting the locking position of the bolts, planar light sources of different shapes and sizes can be fixed.

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