Coated glass defect detection system

Abstract

The invention discloses a coated glass defect detection system which comprises a glass conveying mechanism used for bearing and driving coated glass to move; the glass conveying mechanism is provided with a first detection station; the camera shooting mechanisms are arranged above the glass conveying mechanism at intervals and correspond to the first detection station; the camera mechanism is used for collecting surface imaging information of the coated glass in the first detection station; the light source mechanism comprises a first light source arranged above the glass conveying mechanism and a second light source arranged below the glass conveying mechanism; the first light source and the second light source are respectively arranged on the upper side and the lower side of the first detection station; through the arrangement of the double-light-source distributed illumination, the system can meet the imaging requirements of micro-surface defects and through-type structure defects at the same time on the premise that an optical assembly is not replaced, and the overall detection breadth and accuracy are improved.

Description

Technical Field

[0001] This application relates to the field of optical inspection technology, and in particular to a defect detection system for coated glass. Background Technology

[0002] On glass coating production lines, coated glass is continuously conveyed under high temperature and high linear speed (usually 0.2m / s to 1.5m / s) conditions. Various types of defects such as scratches, bubbles, film damage, and pinholes may occur on its surface and inside. In order to ensure product quality and meet the downstream automatic cutting requirements, industrial production generally requires online real-time acquisition of optical images of the glass surface to achieve defect identification and location.

[0003] Existing online inspection equipment for coated glass mostly uses single-source illumination or relatively simple light source configurations to inspect the glass surface or local areas through reflected light images. In actual working conditions, the reflection characteristics of the glass surface are complex, and single-source imaging often suffers from problems such as insufficient local brightness, limited reflection angle, and overlapping information between the upper and lower surfaces, making it difficult to present some defects stably and clearly. Summary of the Invention

[0004] This application provides a defect detection system for coated glass, which aims to solve the problem of insufficient defect presentation effect under single-light source imaging in existing glass inspection equipment.

[0005] To achieve the above objectives, this application proposes a defect detection system for coated glass, comprising: A glass conveying mechanism is used to carry and drive the movement of coated glass; the glass conveying mechanism has a first inspection station; A camera mechanism is spaced above the glass conveying mechanism and is positioned corresponding to the first inspection station; the camera mechanism is used to collect surface imaging information of the coated glass in the first inspection station. The light source mechanism includes a first light source disposed above the glass conveying mechanism and a second light source disposed below the glass conveying mechanism; the first light source and the second light source are respectively disposed on the upper and lower sides of the first detection station.

[0006] In some embodiments, the glass conveying mechanism is provided with a second inspection station, and the second inspection station and the first inspection station are arranged sequentially along the conveying direction of the glass conveying mechanism; A thickness detection mechanism is provided on the glass conveying mechanism corresponding to the second detection station. The thickness detection mechanism is used to collect the thickness information of the coated glass in the second detection station.

[0007] In some embodiments, a temperature control mechanism is further included, which includes a fan and a temperature sensor corresponding to the first detection station; the temperature control mechanism is used to cool the surface of the coated glass entering the first detection station.

[0008] In some embodiments, a gantry frame corresponding to the first detection station is further included, the camera mechanism is disposed on the gantry frame, and a first housing for covering the camera mechanism is also provided on the gantry frame; The lower end of the first housing is provided with a first window corresponding to the shooting optical path of the camera mechanism.

[0009] In some embodiments, the fan is disposed on the side of the first housing near the thickness detection mechanism, and the first light source and the second light source are sequentially disposed below the fan; The gantry frame is also provided with a second housing for covering the first light source; the lower end of the second housing is provided with a second window to avoid the illumination path of the first light source, and the upper end of the second housing is provided with a third window that communicates with the air outlet of the fan.

[0010] In some embodiments, a main controller is also included, which is electrically connected to the camera mechanism, the light source mechanism, the temperature control mechanism, and the thickness detection mechanism.

[0011] In some embodiments, the camera mechanism includes a first mounting frame and a lifting assembly for moving the first mounting frame up and down; The first mounting bracket is provided with a second mounting bracket. The camera mechanism also includes a camera mounted on the second mounting bracket, a transverse component that drives the second mounting bracket to move, and a first angle adjustment component that drives the second mounting bracket to rotate, thereby causing the camera to change its shooting angle.

[0012] In some embodiments, the traverse assembly includes a slide rail, a slider disposed on the slide rail, a first drive motor, and a first synchronous pulley set connecting the first drive motor and the slider; the first drive motor drives the slider to move along the slide rail via the first synchronous pulley set; there are two traverse assemblies, which are respectively disposed on both sides of the second mounting bracket; The second mounting bracket is fitted over the camera, and the two side walls of the second mounting bracket are respectively connected to the two sliders via two rotating shafts; the first angle adjustment assembly includes a second drive motor and a second synchronous wheel set for realizing the transmission connection between the second drive motor and the rotating shaft.

[0013] In some embodiments, the light source mechanism further includes two second angle adjustment components for driving the first light source and the second light source to rotate to change the emission angle of the light source.

[0014] In some embodiments, the second angle adjustment component is disposed at one end of the first light source or the second light source; the light source mechanism further includes an XZ axis moving module for driving the movement of the second angle adjustment component.

[0015] The beneficial effects of this application are as follows: The coated glass defect detection system of this application achieves differentiated illumination and imaging acquisition of the upper and lower surfaces of the coated glass by setting a first light source and a second light source on the upper and lower sides of the detection station, respectively. On the one hand, the first light source set above the glass reflects a high-energy beam directly to the camera mechanism through a specular reflection path, making minor defects such as tiny scratches, particles, and uneven film layers on the glass surface brightly visible in the image, improving the ability to identify surface details. On the other hand, the second light source set below the glass reflects light from the lower surface after penetrating the glass, and then returns to the camera mechanism via the upper surface. Because the light undergoes multiple transmissions and refractions through the material in this path, its energy is weaker, but it has a higher response sensitivity to penetrating defects such as bubbles, impurities, and deep cracks. Through the above-mentioned dual-light source distributed illumination setup, the system can simultaneously meet the imaging needs of micro-surface defects and penetrating structural defects without changing the structure or optical components, improving the overall detection breadth and accuracy, and exhibiting good detection consistency and engineering adaptability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the coated glass defect detection system of this application; Figure 2 This is a schematic diagram of the camera mechanism structure of an embodiment of the coated glass defect detection system of this application; Figure 3 This is a schematic diagram of the overall structure of the gantry frame in one embodiment of the coated glass defect detection system of this application; Figure 4 This is a schematic diagram of the gantry crane from an elevation angle, representing an embodiment of the coated glass defect detection system of this application. Figure 5 for Figure 3 A magnified view of a portion of point A in the middle; In the diagram: 1. Glass conveying mechanism; 2. Camera mechanism; 21. First mounting frame; 22. Lifting assembly; 23. Second mounting frame; 24. Camera; 25. Horizontal movement assembly; 251. Slide rail; 252. Slider; 253. First drive motor; 254. First synchronous pulley group; 2541. First synchronous pulley; 2542. Second synchronous pulley; 2543. Third synchronous pulley; 2544. Fourth synchronous pulley; 2545. First synchronous belt; 2546. Second synchronous belt; 26. First angle adjustment assembly; 261. Second drive motor; 262. Second synchronous pulley Group; 2621, Fifth Synchronous Pulley; 2622, Sixth Synchronous Pulley; 2623, Third Synchronous Belt; 27, Synchronous Shaft; 28, Rotating Shaft; 3, Light Source Mechanism; 31, First Light Source; 32, Second Light Source; 33, Second Angle Adjustment Component; 34, XZ Axis Moving Module; 4, Thickness Detection Mechanism; 41, Thickness Sensor; 42, Stand; 5, Temperature Control Mechanism; 51, Fan; 6, Gantry; 61, First Housing; 611, First Window; 62, Second Housing; 621, Second Window; 622, Third Window; 7, Coated Glass; 8, Main Controller. Detailed Implementation

[0017] The solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments in this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0020] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0021] This application proposes a defect detection system for coated glass, referring to... Figure 1 In one embodiment, the coated glass defect detection system includes: Glass conveying mechanism 1 is used to carry and drive the coated glass 7 to move; glass conveying mechanism 1 has a first inspection station; Camera 2 is spaced above the glass conveying mechanism 1 and is set corresponding to the first inspection station; camera 2 is used to collect surface imaging information of the coated glass 7 in the first inspection station; The light source mechanism 3 includes a first light source 31 disposed above the glass conveying mechanism 1 and a second light source 32 disposed below the glass conveying mechanism 1; the first light source 31 and the second light source 32 are respectively disposed on the upper and lower sides of the first detection station.

[0022] In this embodiment, the glass conveying mechanism 1 is used to carry and drive the coated glass 7 to move along a preset path so that the coated glass 7 passes through the detection area in sequence. The glass conveying mechanism 1 adopts a roller structure, which consists of several parallel conveying rollers. Imaging channels are left between the rollers to realize optical acquisition of the upper and lower surfaces.

[0023] In addition, in some other embodiments, the glass conveying mechanism 1 can also adopt other structures such as chains or vacuum adsorption platforms, as long as it can expose the upper and lower surfaces of the glass for light source detection and imaging during the smooth movement of the glass.

[0024] In this embodiment, the first inspection station is located in the middle of the glass transport path. To optimize defect imaging quality and avoid light path obstruction, the light source mechanism 3 and the camera mechanism 2 are arranged sequentially along the glass transport direction. The first light source 31 and the second light source 32 are positioned in front of the camera mechanism 2 to illuminate the upper and lower surfaces of the glass before it enters the imaging area. The camera mechanism 2 is positioned after the light source illumination, allowing reflected or transmitted light to fully enter the camera's field of view, thereby acquiring clear image data. By arranging the light source mechanism 3 and the camera mechanism 2 in a front-to-back manner according to the glass transport direction, the problem of light source obstruction of the camera mechanism 2's light path can be effectively avoided, ensuring imaging consistency and defect identification accuracy during the inspection process. The vertical arrangement of the first light source 31 and the second light source 32 allows for enhanced identification of penetrating defects using the transmitted light generated by the first light source 31, while the reflected light generated by the second light source 32 improves the imaging contrast of surface micro-defects, thus enabling joint detection of different types of defects.

[0025] In a preferred embodiment, the first light source 31 and the second light source 32 are arranged along the height direction of the glass conveying mechanism 1, facing each other vertically. This creates a symmetrical illumination path within the imaging area, facilitating control of the incident angle and improving imaging contrast and uniformity. It should be noted that the first light source 31 and the second light source 32 can also be arranged in a non-facing manner depending on the specific installation space or imaging requirements. For example, the upper and lower light sources may be misaligned in the conveying direction or slightly offset in the height direction. This non-facing structure can be used to adjust the incident light path, optimize the local illumination angle, or avoid adjacent components when the structural layout is limited, thus meeting the detection arrangement requirements in more complex scenarios.

[0026] The first light source 31 and the second light source 32 can be line light sources, area array light sources or other lighting devices suitable for industrial imaging. Their specific structures can be flexibly selected according to factors such as glass width, defect type, and imaging requirements, and are not limited to a certain type of light source.

[0027] In a preferred embodiment, a second inspection station is provided on the glass conveying mechanism 1, and the second inspection station and the first inspection station are arranged sequentially along the conveying direction of the glass conveying mechanism 1. A thickness detection mechanism 4 is provided on the glass conveying mechanism 1 corresponding to the second detection station. The thickness detection mechanism 4 is used to collect the thickness information of the coated glass 7 in the second detection station.

[0028] Reference Figure 1In this embodiment, the thickness detection mechanism 4 includes multiple thickness sensors 41 mounted above the second detection station, which are used to collect thickness information at different positions on the glass. The multiple thickness sensors 41 are fixedly mounted above the glass conveying mechanism 1 by a stand 42. The multiple thickness sensors 41 are distributed along the width direction of the glass and are located on the same horizontal line to form a horizontal measurement path, which is used to improve measurement accuracy and anti-interference ability.

[0029] Specifically, the thickness sensor 41 can be a laser displacement sensor, an inductive sensor, or other non-contact thickness measurement device.

[0030] In a preferred embodiment, the coated glass defect detection system further includes a temperature control mechanism 5, which includes a fan 51 and a temperature sensor (not shown in the figure) corresponding to the first detection station; the temperature control mechanism 5 is used to cool the surface of the coated glass 7 entering the first detection station.

[0031] In this embodiment, the temperature sensor is positioned in front of the fan 51, that is, upstream of the fan 51 in the direction of the glass conveying mechanism 1. This sensor is used to measure the temperature of the coated glass 7 before it enters the first detection station in real time before the fan 51 delivers air. This arrangement ensures that the fan 51 acquires the initial temperature data of the glass surface before ventilation and cooling, thereby determining the airflow intensity based on the measured temperature value. This avoids energy waste or inaccurate temperature control due to misjudgment or delayed response. The fan 51, mounted above the glass conveying mechanism 1, can form a longitudinal or oblique airflow before the glass enters the imaging area. This weakens the thermal airflow disturbance generated by the high-temperature glass surface, thereby reducing the interference of heat fluctuations on the imaging path of the camera mechanism 2 and ensuring stability and clarity during image acquisition.

[0032] With the temperature control mechanism 5 in place, the system can provide timely temperature feedback and airflow response when the glass surface temperature is too high, effectively suppressing the impact of thermal disturbance on imaging quality and improving the stability and anti-interference capability of defect identification.

[0033] Specifically, the preferred temperature sensor is a non-contact infrared temperature sensor, which features fast response, high measurement accuracy, and strong adaptability to high-temperature transparent materials, making it particularly suitable for dynamic temperature detection in high-speed glass conveying scenarios. Of course, depending on the actual application environment, other sensor types suitable for surface temperature monitoring, such as thermocouples, thermistors, and fiber optic temperature sensors, can also be used.

[0034] Specifically, the fan 51 is preferably a variable frequency control fan 51, which, through linkage with the temperature measurement results of the temperature sensor, can achieve dynamic adjustment of wind speed and air volume, thereby providing matching cooling airflow under different thicknesses and temperature conditions, improving temperature control efficiency and energy consumption control capabilities. In other embodiments, the fan 51 can also be a modular air supply unit with adjustable dampers or multiple wind speeds to meet the temperature control requirements under different production cycles and thermal disturbance intensities.

[0035] In a preferred embodiment, the coated glass defect detection system further includes a gantry 6 corresponding to the first detection station, a camera mechanism 2 is mounted on the gantry 6, and a first housing 61 for covering the camera mechanism 2 is also provided on the gantry 6. The lower end of the first housing 61 is provided with a first window 611 corresponding to the shooting optical path of the camera mechanism 2.

[0036] Reference Figure 3 In this embodiment, the gantry 6 is a fixed structure spanning above the glass conveying mechanism 1, used to support the camera mechanism 2 and ensure a stable and unobstructed imaging field of view for the first inspection station. The gantry 6 has a simple structure, low cost, and is easy to manufacture. As a relatively basic and mature equipment support method, it is suitable for most production line inspection scenarios. It should be noted that, to meet the installation requirements under different working conditions, the camera mechanism 2 can also be arranged using other support components such as column brackets, cantilever structures, and suspension rails.

[0037] To improve the stability and anti-interference capability of the imaging environment, a first housing 61 is provided on the outside of the camera mechanism 2. The first housing 61 covers the outer periphery of the camera mechanism 2, and a first window 611 corresponding to the shooting optical path is provided at its lower end. The first housing 61 can effectively prevent dust or stray light in the external environment from interfering with the imaging results, and at the same time, it plays a protective role for the camera device itself, improving the reliability and service life of the system. The first window 611 is a reserved optical channel to ensure that the imaging optical path is unobstructed and undeflected, avoiding problems such as vignetting, distortion, or abnormal focusing caused by structural obstruction.

[0038] In a preferred embodiment, the fan 51 is disposed on the side of the first housing 61 near the thickness detection mechanism 4, and the first light source 31 and the second light source 32 are disposed below the fan 51 in sequence. The gantry frame 6 is also provided with a second housing 62 for covering the first light source 31; the lower end of the second housing 62 is provided with a second window 621 to avoid the illumination path of the first light source 31, and the upper end of the second housing 62 is provided with a third window 622 that communicates with the air outlet of the fan 51.

[0039] Reference Figure 1 and Figure 4In this embodiment, the fan 51 is disposed on the outer wall of the first housing 61, near the thickness detection mechanism 4, that is, the fan 51 is located between the first detection station and the second detection station. The air supply direction of the fan 51 is towards the first detection station, and it is used to guide and cool the passing coated glass 7. The first light source 31 and the second light source 32 are both located below the fan 51, and are respectively located on the upper and lower sides of the first detection station. They form a penetrating lighting structure by vertical arrangement. The installation of the fan 51 will not affect the operation of the light source mechanism 3.

[0040] To improve the stability of the light source and prevent airflow disturbances and interference from external light on the imaging results, a second housing 62 is also provided on the gantry 6 to cover the first light source 31. A second window 621 is provided at the lower end of the second housing 62 to avoid obstructing the illumination path of the first light source 31, ensuring that the beam can completely illuminate the surface of the coated glass 7 without obstruction or light spot interference. A third window 622 is provided at the upper end of the second housing 62 to connect with the air outlet of the fan 51, thereby enabling airflow to pass through the interior of the second housing 62 and be guided to the first detection station along the arrangement direction of the first light source 31. Through the above structural arrangement, the airflow delivered by the fan 51 can directly enter the first detection station along the air guide channel of the second housing 62, effectively reducing the heat disturbance caused by the high-temperature glass. At the same time, the second housing 62 provides physical protection, light guiding and shielding, and temperature control for the first light source 31, improving the overall system reliability and the anti-interference capability of image acquisition.

[0041] It should be noted that, in this embodiment, the first window 611 at the lower end of the first housing 61 and the second window 621 at the lower end of the second housing 62 are used to avoid the optical paths of the camera mechanism 2 and the first light source 31, respectively. The space below the first window 611 and the space below the second window 621 are interconnected, allowing the camera mechanism 2 and the first light source 31 to directly align with the coated glass 7 conveyed on the glass conveying mechanism 1 through the openings at the bottom of the integral housing formed by the first housing 61 and the second housing 62, forming independent optical paths. Since the camera mechanism 2 and the light source mechanism 3 are not in the same vertical direction in their structural arrangement, that is, they do not overlap in the vertical projection direction, they will not obstruct or interfere with each other during operation, and can stably complete the imaging acquisition and illumination projection tasks, thereby ensuring the detection accuracy and the coordination of system operation.

[0042] In a preferred embodiment, the coated glass defect detection system further includes a main controller 8, which is electrically connected to the camera mechanism 2, the light source mechanism 3, the temperature control mechanism 5, and the thickness detection mechanism 4.

[0043] In this embodiment, the main controller 8 is used for centralized management and coordinated control of the entire coated glass defect detection system; the main controller 8 is electrically connected to the camera mechanism 2, the light source mechanism 3, the temperature control mechanism 5 and the thickness detection mechanism 4 respectively, which can realize data interaction and logical linkage between the functional modules.

[0044] Specifically, after the coated glass 7 enters the second inspection station, the thickness inspection mechanism 4 prioritizes the real-time thickness measurement of the glass and transmits the obtained thickness information to the main controller 8; the main controller 8 can adjust the position of the light source mechanism 3 and the camera mechanism 2 according to the thickness information.

[0045] When the coated glass 7 approaches the first inspection station, the temperature sensor of the temperature control mechanism 5 will measure the temperature of the glass in real time and transmit the acquired temperature information to the main controller 8. The main controller 8 can adjust the fan 51 according to the temperature information to intervene in the airflow of the high-temperature glass in advance and reduce the impact of thermal disturbance.

[0046] After the glass enters the first inspection station, the camera mechanism 2 completes the image acquisition operation under the illumination of the light source mechanism 3, and transmits the acquired image data to the main controller 8. Throughout the process, the main controller 8 acts as the central scheduling unit to ensure the consistency of time and logic in each link such as thickness detection, temperature control, light source control and imaging acquisition, thereby achieving high efficiency, real-time performance and stability of the defect detection process.

[0047] In a preferred embodiment, the camera mechanism 2 includes a first mounting frame 21 and a lifting assembly 22 that drives the first mounting frame 21 to move up and down. The first mounting bracket 21 is provided with a second mounting bracket 23. The camera mechanism 2 also includes a camera 24 disposed on the second mounting bracket 23, a transverse component 25 for driving the second mounting bracket 23 to move, and a first angle adjustment component 26 for driving the second mounting bracket 23 to rotate, thereby causing the camera 24 to change the shooting angle.

[0048] Reference Figure 1 In this embodiment, for ease of description, it is agreed that the conveying direction of the glass conveying mechanism 1 to the coated glass 7 is the X-axis direction, the horizontal vertical extension direction of the X-axis direction (i.e. the width direction of the glass conveying mechanism 1) is the Y-axis direction, and the vertical direction of the X-axis direction is the Z-axis direction (i.e. the height direction of the gantry 6).

[0049] Reference Figure 2In this embodiment, to improve the system's adaptability to glass of different thicknesses or deformations, the camera assembly 2 is configured with a multi-degree-of-freedom adjustable structure. The first mounting bracket 21 is connected to the gantry 6 structure via the lifting assembly 22, allowing the camera assembly 2 to move up and down along the Z-axis, thereby adjusting the shooting height of the camera 24 and compensating for the focal plane shift caused by glass surface warping or thickness differences.

[0050] Preferably, the lifting assembly 22 adopts a linear module combined with a guide rail structure, which has high positioning accuracy and smooth movement. In other embodiments, the lifting assembly 22 can also be replaced with a screw lifting structure, a pneumatic lifting unit, etc., to adapt to the structural layout or cost control requirements of different scenarios.

[0051] Furthermore, a second mounting bracket 23 is provided on the first mounting bracket 21. The transverse component 25 can drive the second mounting bracket 23 to slide in the X-axis direction to adjust the alignment of the imaging field center of the camera 24 with the glass movement trajectory and adjust the relative object distance.

[0052] The second mounting bracket 23 is also connected to the first angle adjustment component 26, which enables the camera 24 body to rotate slightly at a downward tilt angle. This is used to fine-tune the field of view of the camera 24, and can adjust the incident and imaging angles to further improve the focusing stability and defect development clarity of image acquisition.

[0053] With the above settings, camera mechanism 2 can be adjusted in three dimensions to adapt to various detection scenarios, and has good flexibility and versatility.

[0054] In a preferred embodiment, the transverse component 25 includes a slide rail 251, a slider 252 disposed on the slide rail 251, a first drive motor 253, and a first synchronous pulley set 254 connecting the first drive motor 253 and the slider 252; the first drive motor 253 drives the slider 252 to move along the slide rail 251 through the first synchronous pulley set 254; there are two transverse components 25, which are respectively disposed on both sides of the second mounting bracket 23; The second mounting bracket 23 is fitted around the camera 24. The two side walls of the second mounting bracket 23 are connected to two sliders 252 by two rotating shafts 28 respectively. The first angle adjustment component 26 includes a second drive motor 261 and a second synchronous pulley set 262 for realizing the transmission connection between the second drive motor 261 and the rotating shaft 28.

[0055] Reference Figure 2In this embodiment, the first synchronous wheel set 254 is used to sequentially transmit the output rotation of the first drive motor 253 to the slider 252 to realize the movement adjustment of the camera 24 in the X-axis direction; the first synchronous wheel set 254 includes two transmission units: one transmission unit is used to realize the synchronous transmission between the first drive motor 253 and the synchronous shaft 27, and the other transmission unit is used to realize the synchronous transmission between the synchronous shaft 27 and the slider 252.

[0056] Specifically, a first drive motor 253 is mounted on a first mounting bracket 21, and a first synchronous pulley 2541 is mounted on the output shaft of the first drive motor 253. A rotatable synchronous shaft 27 is horizontally mounted on the first mounting bracket 21, and a second synchronous pulley 2542 is mounted on one end of the synchronous shaft 27 and rotates coaxially with it. A first synchronous belt 2545 is fitted between the first synchronous pulley 2541 and the second synchronous pulley 2542. Through the above cooperation, when the first drive motor 253 is working, it can drive the synchronous shaft 27 to rotate through the first synchronous pulley 2541, the second synchronous pulley 2542, and the first synchronous belt 2545.

[0057] Furthermore, a third synchronous pulley 2543 is fitted onto the synchronous shaft 27, and a fourth synchronous pulley 2544 is rotatably mounted on the first mounting bracket 21. A second synchronous belt 2546 is fitted onto the third synchronous pulley 2543 and the fourth synchronous pulley 2544. The second synchronous belt 2546 is arranged parallel to the slide rail 251, both along the X-axis, i.e., the conveying direction of the glass conveying mechanism 1. The slider 252 is mounted on the second synchronous belt 2546. At this time, through the transmission structure of the third synchronous pulley 2543, the fourth synchronous pulley 2544, and the second synchronous belt 2546, the rotation of the synchronous shaft 27 can be transmitted to the second synchronous belt 2546, thereby driving the slider 252 to move smoothly along the slide rail 251.

[0058] It should be noted that the two transverse components 25 share a common synchronous axis 27, and the camera 24 is located between the two transverse components 25. This symmetrical arrangement helps to balance the drive load and avoid the slider 252 from shifting or the mechanism from shaking due to unilateral traction, thereby achieving smooth and synchronous movement of the camera mechanism 2 in the X-axis direction.

[0059] In summary, by setting up a dual-drive and dual-synchronization transmission structure, the output rotation of the first drive motor 253 can be stably transmitted to the slider 252, thereby driving the second mounting bracket 23 to move in the X-axis direction, which is used to realize the left and right fine adjustment and alignment of the field of view of the camera 24.

[0060] Reference Figure 2In this embodiment, the second synchronous pulley set 262 includes a fifth synchronous pulley 2621 disposed on the output shaft of the first angle adjustment component 26, a sixth synchronous pulley 2622 coaxially rotatable with the rotating shaft 28, and a third synchronous belt 2623 sleeved between the fifth synchronous pulley 2621 and the sixth synchronous pulley 2622. The rotating shaft 28 is mounted on the slider 252 via a bearing assembly, enabling the second mounting bracket 23 to rotate relative to the slider 252 along the axial direction of the rotating shaft 28. Through the above transmission structure, the second drive motor 261 can drive the rotating shaft 28 to rotate via the second synchronous pulley set 262, thereby driving the second mounting bracket 23 to rotate around the axis of the rotating shaft 28, thus achieving the adjustment of the shooting angle of the camera 24.

[0061] With the above settings, the camera 24 can maintain translational stability while having a certain degree of freedom in adjusting the shooting angle, so as to adapt to the imaging needs under different reflection angles or light source configurations.

[0062] In this embodiment, two camera mechanisms 2 are provided, evenly arranged along the width direction (Y-axis) of the glass conveying mechanism 1. The two cameras 24 can simultaneously acquire images under the scheduling of the main controller 8, covering different imaging areas along the width of the glass, thereby improving image acquisition efficiency and imaging continuity. This arrangement is particularly suitable for full-frame coverage detection of coated glass 7 with a large width, avoiding the problem of blind spots or resolution degradation in edge areas with a single camera 24.

[0063] It should be noted that the number of cameras 24 is not limited to two. In other embodiments, multiple camera arrays 24 can be arranged according to glass specifications, defect density, or detection accuracy requirements. By increasing the number of cameras 24 and arranging them in combination along the Y-axis, the system can further expand the field of view, reduce image stitching errors, and improve the flexibility and adaptability of the overall detection system.

[0064] In a preferred embodiment, the light source mechanism 3 further includes two second angle adjustment components 33 for driving the first light source 31 and the second light source 32 to rotate to change the emission angle of the light source.

[0065] Reference Figure 3 and Figure 5 In this embodiment, both the first light source 31 and the second light source 32 are arranged facing the glass conveying mechanism 1 to provide illumination when the glass passes through the detection area. Preferably, both the first light source 31 and the second light source 32 extend along the width direction of the glass conveying mechanism 1, i.e., the Y-axis direction, and are arranged in a long strip shape, with a length that can cover the full width area of ​​the glass. By arranging this type of linear or planar light source, uniform illumination of the entire lateral range of the glass can be achieved without moving the position of the light source, which is beneficial to improving the consistency of imaging and the comprehensiveness of defect identification.

[0066] Specifically, to improve the identification effect of different types of glass defects, the first light source 31 and the second light source 32 can rotate around the support structure set along their respective axes. The light source mechanism 3 also includes two second angle adjustment components 33, which are used to drive the first light source 31 and the second light source 32 to rotate around the Y-axis, respectively. This angle adjustment method can adjust the emission direction of the light source according to the actual detection needs, so that the illumination angle and the incident reflection angle of the glass surface are optimally matched, thereby improving the development contrast of specific types of defects. Especially when the glass thickness, film structure, or surface refractive index varies greatly, flexibly adjusting the illumination angle of the light source can effectively compensate for the imaging deviation problem under a fixed illumination scheme, and enhance the system's compatibility and detection accuracy for multiple types of defects.

[0067] In a preferred embodiment, the second angle adjustment component 33 is disposed at one end of the first light source 31 or the second light source 32; the light source mechanism 3 further includes an XZ axis moving module 34 for driving the second angle adjustment component 33 to move.

[0068] Reference Figure 5 In this embodiment, the second angle adjustment component 33 is a motor-driven structure, whose output shaft is connected to the first light source 31 or the second light source 32, and is used to drive the light source to rotate around the Y-axis to adjust the emission angle of the light source. The first light source 31 and the second light source 32 are arranged laterally on the support structure, and both ends are supported and installed by the support structure. One end is driven by the second angle adjustment component 33 to realize the angle change of the light source body on the fixed axis. The support structure can be directly installed on the gantry 6 or independently installed outside the glass conveying mechanism 1. It should be noted that the support and installation of the first light source 31 and the second light source 32 are independently set up and do not interfere with each other. The light source mechanism 3 can maintain the stable suspension of the light source and facilitate the rotation control of the light source. It is flexible in adjustment and suitable for the optical arrangement requirements in industrial scenarios.

[0069] Furthermore, to achieve multi-dimensional adjustment of the light source mechanism 3 in height and position, the light source mechanism 3 also includes an XZ-axis moving module 34 connected to the second angle adjustment component 33. The XZ-axis moving module 34 can drive the second angle adjustment component 33 and its connected light source to move along the glass conveying direction (X-axis) and the vertical direction (Z-axis), which is used to adapt to the detection position of glass of different specifications, adjust the illumination area of ​​the light source, or match the optimal imaging angle. In this embodiment, the XZ-axis moving module 34 can be a module composed of mature transmission components in the prior art such as linear modules, electric slides, or industrial guide rails, and is not specifically limited here.

[0070] Through the above structure, the light source mechanism 3 not only has the ability to rotate around the axis, but also can adjust its position and height to form a flexible arrangement scheme in three-dimensional space. This helps the system to achieve better lighting control effect through mechanical adjustments when facing different glass thicknesses, widths and reflective characteristics.

[0071] In actual operation, this coated glass defect detection system first uses a thickness detection mechanism 4 located at the second detection station to collect the real-time thickness of the coated glass 7 entering the system. When the coated glass 7 is transported to the second detection station by the glass conveying mechanism 1, the thickness detection mechanism 4 collects its real-time thickness. The collected glass thickness information is transmitted to a preset lookup table module in the main controller 8. Based on this lookup table and the glass thickness information, the main controller 8 outputs a set of coordinate parameters containing six key position information, including the target position (X_U, Z_U) of the upper first light source 31 in the conveying direction (X-axis) and height direction (Z-axis), the target position (X_L, Z_L) of the lower second light source 32 in the conveying direction (X-axis) and height direction (Z-axis), and the target position (X_C, Z_C) of the camera 24 in the conveying direction (X-axis) and height direction (Z-axis).

[0072] These target coordinates are used to guide the position adjustment of the light source mechanism 3 and the camera mechanism 2, achieving precise alignment with the coated glass 7. This dynamic adjustment method based on glass thickness information can adapt to changes in the optical path and focusing requirements caused by different glass thicknesses, ensuring the clarity and contrast of subsequent image acquisition.

[0073] After the position adjustment is completed, the main controller 8 controls the first light source 31 and the second light source 32 to light up in a time-sharing manner, and works with the camera 24 to achieve synchronous image acquisition when the light sources are lit. The defect images of the upper surface of the glass and the lower surface of the transmission are acquired and sent to the main controller 8. The main controller 8 then obtains the specific information of the defect through the built-in image processing module.

[0074] During this image acquisition process, a temperature control mechanism 5 is installed in the system to eliminate the interference of hot airflow disturbances that may be generated on the high-temperature glass surface to image imaging. Just before the glass enters the first inspection station, an infrared temperature sensor located at the front of this area detects the glass surface temperature in real time and transmits the temperature information to the main controller 8. The main controller 8 compares the temperature information with a preset temperature control curve to control the operating frequency of the fan 51, thereby cooling the glass surface with airflow. The temperature control curve is a piecewise linear or polynomial function between the glass surface temperature and the operating frequency of the fan 51, and can be designed according to actual needs. This temperature control mechanism can effectively suppress hot air refraction disturbances and improve image stability.

[0075] In summary, by combining modular design such as thickness detection, dynamic position adjustment of light source mechanism 3 and camera mechanism 2, dual-light source imaging and temperature control optimization, this system can achieve accurate defect detection of coated glass 7, and has good detection adaptability and engineering practicality.

[0076] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A defect detection system for coated glass, characterized in that, include: A glass conveying mechanism is used to carry and drive the movement of coated glass; the glass conveying mechanism has a first inspection station; A camera mechanism is spaced above the glass conveying mechanism and is positioned corresponding to the first inspection station; the camera mechanism is used to collect surface imaging information of the coated glass in the first inspection station. The light source mechanism includes a first light source disposed above the glass conveying mechanism and a second light source disposed below the glass conveying mechanism; the first light source and the second light source are respectively disposed on the upper and lower sides of the first detection station.

2. The coating glass defect detection system according to claim 1, characterized in that, The glass conveying mechanism is provided with a second inspection station, and the second inspection station and the first inspection station are arranged sequentially along the conveying direction of the glass conveying mechanism; A thickness detection mechanism is provided on the glass conveying mechanism corresponding to the second detection station. The thickness detection mechanism is used to collect the thickness information of the coated glass in the second detection station.

3. The defect detection system for coated glass according to claim 2, characterized in that, It also includes a temperature control mechanism, which includes a fan and a temperature sensor corresponding to the first detection station; the temperature control mechanism is used to cool the surface of the coated glass entering the first detection station.

4. The coating glass defect detection system according to claim 3, characterized in that, It also includes a gantry frame corresponding to the first detection station, the camera mechanism is mounted on the gantry frame, and the gantry frame is also provided with a first housing for covering the camera mechanism; The lower end of the first housing is provided with a first window corresponding to the shooting optical path of the camera mechanism.

5. The coating glass defect detection system according to claim 4, characterized in that, The fan is located on the side of the first housing near the thickness detection mechanism, and the first light source and the second light source are sequentially located below the fan. The gantry frame is also provided with a second housing for covering the first light source; the lower end of the second housing is provided with a second window to avoid the illumination path of the first light source, and the upper end of the second housing is provided with a third window that communicates with the air outlet of the fan.

6. The defect detection system for coated glass according to claim 3, characterized in that, It also includes a main controller, which is electrically connected to the camera mechanism, the light source mechanism, the temperature control mechanism, and the thickness detection mechanism.

7. The coating glass defect detection system according to claim 1, characterized in that, The camera mechanism includes a first mounting frame and a lifting assembly that drives the first mounting frame to move up and down. The first mounting bracket is provided with a second mounting bracket. The camera mechanism also includes a camera mounted on the second mounting bracket, a transverse component that drives the second mounting bracket to move, and a first angle adjustment component that drives the second mounting bracket to rotate, thereby causing the camera to change its shooting angle.

8. The coating glass defect detection system according to claim 7, characterized in that, The lateral movement assembly includes a slide rail, a slider cooperatingly disposed on the slide rail, a first drive motor, and a first synchronous pulley set connecting the first drive motor and the slider; the first drive motor drives the slider to move along the slide rail through the first synchronous pulley set; there are two lateral movement assemblies, which are respectively disposed on both sides of the second mounting bracket; The second mounting bracket is fitted over the camera, and the two side walls of the second mounting bracket are respectively connected to the two sliders via two rotating shafts; the first angle adjustment assembly includes a second drive motor and a second synchronous wheel set for realizing the transmission connection between the second drive motor and the rotating shaft.

9. The defect detection system for coated glass according to claim 1, characterized in that, The light source mechanism also includes two second angle adjustment components for driving the first light source and the second light source to rotate so as to change the emission angle of the light source.

10. The defect detection system for coated glass according to claim 9, characterized in that, The second angle adjustment component is disposed at one end of the first light source or the second light source; the light source mechanism further includes an XZ axis moving module for driving the movement of the second angle adjustment component.

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