Automobile rearview mirror lens vision detection equipment

Abstract

The application discloses a kind of automobile rearview mirror lens visual inspection equipment, including machine base, conveying mechanism, first detection mechanism and second detection mechanism, wherein, conveying mechanism is located in machine base, to carry and transport automobile rearview mirror lens;First detection mechanism and second detection mechanism are spaced apart along the direction of lens conveying, first detection mechanism is used to detect the defect information of automobile rearview mirror lens, and second detection mechanism is used to detect the profile information of automobile rearview mirror lens.The application is by being provided with conveying mechanism, first detection mechanism and second detection mechanism, conveying mechanism carries and transmission lens, first detection mechanism and second detection mechanism are spaced apart along the conveying direction, respectively detect defect and profile information, form assembly line operation, compared with artificial detection significantly shorten detection period, to realize unmanned detection, and improve detection efficiency and detection accuracy.

Description

Technical Field

[0001] This application relates to the field of glass visual inspection equipment, and in particular to a visual inspection device for automotive rearview mirror lenses. Background Technology

[0002] As a key component for safe driving, automotive rearview mirror lenses are mainly used to provide drivers with a clear rear view. They are usually made of glass substrate through deep processing processes such as cutting, coating, hot bending and polishing. They need to have high surface flatness, excellent optical reflection performance and precise edge processing to ensure that there is no vision distortion or safety hazards during driving. They are widely used in automotive assembly lines.

[0003] In the lens manufacturing process, various defects can easily occur, such as surface point defects like pitting, crystal points, and black spots; linear defects like scratches and dirt; optical performance defects like mirror distortion and bubbles; edge defects like chipping, incomplete grinding, and over-grinding; and contour defects like dimensional deviations and step differences. If these defects are not detected in time, they may lead to blurred vision for drivers after lens assembly, causing traffic accidents, while also increasing the production defect rate and rework costs.

[0004] The current method of inspecting automotive rearview mirror lenses is manual, which has high production efficiency and a high rate of missed inspections. Therefore, there is an urgent need for a visual inspection device for automotive rearview mirror lenses to achieve unmanned inspection and improve inspection efficiency and accuracy. Utility Model Content

[0005] The main purpose of this application is to propose a visual inspection device for automotive rearview mirror lenses, which aims to achieve unmanned inspection of automotive rearview mirror lenses and improve inspection efficiency and accuracy.

[0006] To achieve the above objectives, this application proposes a visual inspection device for automotive rearview mirror lenses, comprising:

[0007] Base:

[0008] A conveying mechanism, located on the base, is used to carry and convey automotive rearview mirror lenses;

[0009] A first inspection mechanism and a second inspection mechanism are arranged at intervals along the lens conveying direction. The first inspection mechanism is used to detect defect information of the automotive rearview mirror lens, and the second inspection mechanism is used to detect contour information of the automotive rearview mirror lens.

[0010] In some embodiments, the conveying mechanism includes a conveyor belt, and the first detection mechanism includes a surface defect detection component straddling the upper side of the conveyor belt, the surface defect detection component being used to detect surface defects in the automotive rearview mirror lens.

[0011] In some embodiments, the surface defect detection component includes:

[0012] A surface inspection camera, which is fixed above the conveyor belt by a first adjustable bracket;

[0013] A coaxial light source is mounted on the first adjustable bracket, and the coaxial light source is located between the lens and the lens element of the surface detection camera;

[0014] Two scattering light sources are mounted on the first adjustable bracket. The two scattering light sources are symmetrically distributed on both sides of the surface inspection camera and are both directed toward the conveyor belt.

[0015] In some embodiments, the conveyor belt includes a first conveyor belt and a second conveyor belt connected to each other, and the surface defect detection component is disposed on the upper side of the first conveyor belt; the first detection mechanism further includes an optical defect detection component disposed on the upper side of the second conveyor belt for detecting optical defects in the automotive rearview mirror lens.

[0016] In some embodiments, the optical defect detection component includes:

[0017] A projection point light source is fixed above the conveyor belt by a first adjustable bracket, and the light-emitting surface of the projection point light source is arranged facing the second conveyor belt.

[0018] A curtain is installed on the upper side of the second conveyor belt;

[0019] A field scan camera is spaced apart on the side of the second conveyor belt opposite to the first conveyor belt, and the field scan camera is positioned facing the screen.

[0020] In some embodiments, the conveying mechanism further includes a carrying robot, and the second detection mechanism includes an edge detection component, wherein:

[0021] The carrying manipulator is used to carry the rearview mirror lens of the car and can drive the carried rearview mirror lens to move toward or away from the edge detection component.

[0022] The edge detection component is disposed on the periphery of the carrying manipulator and is used to detect the edge information of the car rearview mirror lens carried by the carrying manipulator.

[0023] In some embodiments, the edge detection assembly includes an edge light source group disposed around the periphery of the carrying robot, and a first detection lens group and a second detection lens group respectively disposed on both sides along the conveying direction of the automotive rearview mirror lens, wherein:

[0024] The first detection lens group includes a first mounting post disposed on the base, and a first line scan camera and a second line scan camera disposed on the first mounting post, wherein the second line scan camera is disposed at intervals below the first line scan camera;

[0025] The second detection lens group includes a second mounting post disposed on the base, and a third line array camera and a fourth line array camera disposed on the second mounting post, wherein the fourth line array camera is disposed at intervals below the third line array camera;

[0026] The first and third line array cameras are used to detect the edges of the upper surface of the rearview mirror lens; the second and fourth line array cameras are used to detect the edges of the lower surface of the rearview mirror lens.

[0027] In some embodiments, the edge light source group includes at least four edge light sources spaced apart around the periphery of the carrying robot.

[0028] In some embodiments, the second testing institution includes:

[0029] A backlight source is provided on the base, which can hold a car rearview mirror lens;

[0030] The contour detection assembly, mounted on the base via a third adjustment bracket, includes a contour light source group and a contour detection camera. The contour light source group is spaced apart above the backlight source, and the car rearview mirror lens can pass between the backlight source and the contour light source group. The contour detection camera is spaced apart above the contour light source group and is used to detect the entire circumference contour of the car rearview mirror lens.

[0031] In some embodiments, the automotive rearview mirror lens visual inspection device further includes a transfer mechanism for transferring the automotive rearview mirror lens between the first inspection mechanism and the second inspection mechanism, the transfer mechanism including;

[0032] A transverse drive component is disposed on the base;

[0033] A suction cup is located at the output end of the transverse drive component to attract and release the rearview mirror lens.

[0034] The lateral drive is used to drive the suction cup hand to transfer the car rearview mirror lens between the first detection mechanism and the second detection mechanism.

[0035] This application establishes a conveying mechanism, a first inspection mechanism, and a second inspection mechanism. The conveying mechanism carries and transports the lens, while the first and second inspection mechanisms are spaced apart along the conveying direction. They respectively inspect defects and contour information, forming an assembly line operation that significantly shortens the inspection cycle compared to manual inspection. The first inspection mechanism uses machine vision technology to inspect surface and optical defects, while the second inspection mechanism accurately measures contour information. Automated inspection ensures high-resolution identification of minute defects, reducing the false negative rate, thereby achieving unmanned inspection and improving inspection efficiency and accuracy. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the automotive rearview mirror lens visual inspection device of this utility model in one embodiment;

[0037] Figure 2 This is a schematic diagram of the first detection mechanism and the first conveyor belt in one embodiment of the automotive rearview mirror lens visual inspection equipment of this utility model;

[0038] Figure 3 This is a schematic diagram of the first detection mechanism and the second conveyor belt in another embodiment of the visual inspection device for automotive rearview mirror lenses of this utility model.

[0039] Figure 4 This is a schematic diagram of the structure of the second detection mechanism in one embodiment of the automotive rearview mirror lens visual inspection device of this utility model;

[0040] Figure 5 This is a schematic diagram of the structure of the second detection mechanism in another embodiment of the automotive rearview mirror lens visual inspection device of this utility model;

[0041] Figure 6 This is a schematic diagram of the transfer mechanism in one embodiment of the automotive rearview mirror lens visual inspection device of this utility model. Detailed Implementation

[0042] 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 the first cosmetic packaging bag embodiment in this application, and not all 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] The visual inspection equipment for automotive rearview mirror lenses proposed in this application is applied to the quality control field in automotive parts production, specifically for the fully automated inspection of surface, optical performance, edge, and contour defects of rearview mirror lenses after deep processing (such as cutting, coating, hot bending, and grinding). (Refer to...) Figure 1 In a preferred embodiment, the automotive rearview mirror lens visual inspection device proposed in this application includes:

[0047] Base 1:

[0048] The conveying mechanism 2, located on the base 1, is used to carry and convey the rearview mirror lens of the car.

[0049] The first inspection mechanism 3 and the second inspection mechanism 4 are arranged at intervals along the lens conveying direction. The first inspection mechanism 3 is used to detect the defect information of the car rearview mirror lens, and the second inspection mechanism 4 is used to detect the contour information of the car rearview mirror lens.

[0050] In this embodiment, the automotive rearview mirror lens visual inspection equipment of this application, through an automated and modular visual inspection system, combined with a conveying mechanism 2 and a multi-station inspection mechanism, achieves comprehensive quality inspection of rearview mirror lenses after deep processing (cutting, coating, hot bending, grinding). Its core principle is based on machine vision technology, utilizing high-precision cameras, light source systems, and image processing algorithms to accurately identify and analyze surface defects (points, lines), optical performance defects (mirror distortion, bubbles), edge defects (chipping, incomplete grinding, over-grinding), and contour defects (dimensional deviations, step differences) of the lens. Through multi-station collaborative work with clear division of labor, the first inspection mechanism 3 is used for defect information detection, and the second inspection mechanism 4 is used for contour information detection, thereby achieving efficient and comprehensive unmanned inspection.

[0051] The process of this application can be summarized in the following steps:

[0052] Lens transport: The rearview mirror lens is placed on the transport mechanism 2 on the base 1. The transport mechanism 2 (such as a conveyor belt or robotic arm) stably delivers the lens to the inspection station in sequence according to the set speed and path, ensuring that the inspection process is continuous and efficient.

[0053] First inspection agency 3: The lens first enters the first inspection agency 3, which, for example, is equipped with a high-resolution camera, a specific wavelength light source (such as visible light or ultraviolet light), and an image processing system. The camera captures image data of the lens surface, and the linear surface defects (pockmarks, crystal points, black spots, scratches, dirt) are analyzed by image processing algorithms (such as edge detection, feature extraction, deep learning models).

[0054] The second inspection unit 4 then inspects the lens, which is used to examine its contour information. For example, high-precision contour scanning technology (such as laser profilometers or structured light scanning) is used to capture the edge shape and size data of the lens, analyzing edge defects (chipping, incomplete grinding, over-grinding) and contour defects (dimensional deviations, step differences). The contour data is precisely measured to ensure the lens meets design specifications.

[0055] Data integration and feedback: For example, data from the first testing institution 3 and the second testing institution 4 can be integrated through a central control system.

[0056] If a defect is detected, the system can automatically mark the defective lens and divert it to the rework or waste channel via the conveyor mechanism 2; the qualified lens continues to flow to the next production stage.

[0057] The test data can be uploaded to the production management system in real time for quality traceability and process optimization.

[0058] This application achieves the following beneficial effects by setting the above structure:

[0059] Firstly, it improves inspection efficiency: Compared to traditional manual inspection, automated multi-station collaborative visual inspection equipment significantly increases inspection speed and shortens the production cycle. The conveyor mechanism 2 and the multi-station inspection assembly line design support continuous production and are suitable for mass production of lenses.

[0060] Secondly, it improves detection accuracy: machine vision technology combined with high-precision image processing algorithms can identify minute defects, reduce the false negative rate, and ensure the stability and consistency of detection results.

[0061] Third, it reduces production costs: Unmanned inspection reduces reliance on manual operation, lowering labor costs and the defect rate caused by human error. At the same time, timely defect detection reduces rework and scrap losses, optimizing production efficiency.

[0062] Reference Figure 1 and Figure 2 In some embodiments, the conveying mechanism 2 proposed in this application includes a conveyor belt 21, and the first detection mechanism 3 includes a surface defect detection component 31 straddling the upper side of the conveyor belt 21. The surface defect detection component 31 is used to detect surface defects of the automotive rearview mirror lens.

[0063] In this embodiment, the conveying mechanism 2 of the automotive rearview mirror lens visual inspection equipment uses a conveyor belt 21, which, in conjunction with the surface defect detection component 31 in the first inspection mechanism 3, enables automated detection of surface defects in the lens. Its working principle is as follows:

[0064] The conveyor belt 21 is mounted on the base 1, serving as a platform for carrying and moving the lenses. Through stable mechanical transmission (such as motor drive), the lenses can be moved continuously and smoothly to the inspection station at a predetermined speed and path. This design ensures the continuity and efficiency of the inspection process, adapting to the needs of assembly line production.

[0065] The surface defect detection component 31 is mounted across the upper side of the conveyor belt 21. Exemplarily, it may typically include a high-resolution camera, a specific light source (such as uniform diffuse light or structured light), and an image processing system.

[0066] When the lens enters the detection area of ​​the surface defect detection component 31 along with the conveyor belt 21, the light source illuminates the lens surface, and the camera captures a high-definition image of the lens surface.

[0067] The system uses image processing algorithms (such as edge detection, feature extraction, or deep learning models) to analyze image data in real time and identify surface defect information, including point defects (pockmarks, crystal points, black spots) and line defects (scratches, dirt).

[0068] After the detection results are processed by the system, data on the type, location, and severity of defects are generated for subsequent quality assessment or triage.

[0069] Reference Figures 1 to 3 In some embodiments, the surface defect detection component 31 proposed in this application includes:

[0070] The surface inspection camera 311 is fixed above the conveyor belt 21 by a first adjustable bracket.

[0071] A coaxial light source 312 is mounted on the first adjustable bracket, and the coaxial light source 312 is located between the camera lens and the lens element.

[0072] Two scattering light sources 313 are mounted on the first adjustable bracket. The two scattering light sources 313 are symmetrically distributed on both sides of the surface inspection camera 311 and are both facing the conveyor belt 21.

[0073] In this embodiment, the surface inspection camera 311 is fixed above the conveyor belt 21 by a first adjustable bracket. Its position can be flexibly adjusted according to the lens size and inspection requirements to ensure optimal imaging angle and focal length. The surface inspection camera 311 can capture image data of the lens surface in real time, covering features such as point defects (pockmarks, crystal points, black spots) and linear defects (scratches, dirt). The surface inspection camera 311 analyzes the acquired images using image processing algorithms (such as edge detection, feature extraction, or deep learning models) to accurately identify the type, location, and severity of defects.

[0074] A coaxial light source 312 is mounted on a first adjustable bracket, positioned between the camera lens and the mirror of the surface inspection camera 311, providing uniform, direct illumination. By aligning its illumination with the optical axis of the surface inspection camera 311, the coaxial light source 312 enhances the reflectivity of the mirror surface, highlighting surface smoothness and enabling the camera to capture clear image details. Its uniform light field design reduces light and shadow interference, ensuring stable image quality and making it suitable for high-precision surface inspection.

[0075] Two diffused light sources 313 are symmetrically distributed on both sides of the surface inspection camera 311, mounted on the first adjustable bracket, and tilted towards the lens on the conveyor belt 21 to provide lateral diffused illumination. The diffused light sources 313 enhance the contrast of surface defects on the lens through soft, diffused light, especially point defects (such as pits, crystal points, and black spots) and linear defects (such as scratches and dirt), making them easier to identify in the image. The symmetrically distributed light source design ensures uniform illumination on both sides of the lens, avoiding blind spots caused by uneven illumination and improving the comprehensiveness of defect detection.

[0076] Please continue to refer to Figures 1 to 3 In some embodiments, the conveyor belt 21 proposed in this application includes a first conveyor belt 211 and a second conveyor belt 212 connected to each other, and a surface defect detection component 31 is disposed on the upper side of the first conveyor belt 211; the first detection mechanism 3 also includes an optical defect detection component 32, which is disposed on the upper side of the second conveyor belt 212 and is used to detect optical defects in the rearview mirror lens of the car.

[0077] In this embodiment, the conveyor belt 21 of the automotive rearview mirror lens visual inspection equipment consists of a first conveyor belt 211 and a second conveyor belt 212 connected to each other. Together with the surface defect detection component 31 and the optical defect detection component 32 in the first inspection mechanism 3, it achieves automated detection of surface defects and optical defects in the lens, respectively. Its working principle is as follows:

[0078] The conveyor belt 21 includes a first conveyor belt 211 and a second conveyor belt 212 connected together, forming a continuous transmission path. Mounted on the base 1, it uses a mechanical transmission system, such as a motor drive, to ensure the smooth and continuous movement of the lens, guaranteeing the efficiency and fluidity of the inspection process. The first conveyor belt 211 carries the lens into the inspection area of ​​the surface defect inspection component 31, while the second conveyor belt 212 further transports the lens to the inspection area of ​​the optical defect inspection component 32. This two-stage design allows the lens to pass through different inspection stations in an orderly manner, enabling step-by-step and specialized inspection. The connected design ensures a smooth transition between the two stages, avoiding impacts on inspection accuracy due to positional shifts or vibrations, while also supporting the high throughput requirements of assembly line production.

[0079] An optical defect detection component 32 is positioned above the second conveyor belt 212 and typically includes a high-resolution camera, a dedicated light source (such as a polarized light source or a specific wavelength light source), and an image processing system. It is specifically designed to detect optical defects in the lens (such as specular distortion and bubbles). When the lens enters the optical detection area along the second conveyor belt 212, the optical defect detection component 32 illuminates the lens with the dedicated light source, enhancing the imaging effect of the optical defects. For example, a polarized light source can highlight refraction or reflection anomalies in specular distortion, while a specific wavelength light source (such as ultraviolet light) can make internal defects such as bubbles more visible. The camera captures images of the lens's optical characteristics, and combined with image processing algorithms (such as light field analysis, texture detection, or deep learning models), it identifies the characteristics of optical defects such as specular distortion and bubbles, analyzing their location, degree, and type.

[0080] Reference Figure 3 In some embodiments, the optical defect detection component 32 proposed in this application includes:

[0081] The projection point light source 321 is fixed above the conveyor belt 21 by the first adjustable bracket, and the light-emitting surface of the projection point light source is set facing the second conveyor belt 212.

[0082] Curtain 322 is installed on the upper side of the second conveyor belt 212;

[0083] Area scan cameras 323 are spaced apart on the side of the second conveyor belt 212 facing away from the first conveyor belt 211, and the area scan cameras 323 are positioned facing the screen 322.

[0084] In this embodiment, the projection point light source 321 is fixed to the first adjustable bracket and located above the second conveyor belt 212, with its light-emitting surface facing the lens on the second conveyor belt 212, providing high-intensity point illumination. The point light source illuminates the lens surface with a focused beam, producing specific light reflection or refraction effects, which can highlight optical defects inside or on the surface of the lens, such as optical path distortion caused by mirror distortion or scattering abnormalities caused by bubbles. The adjustable bracket allows for flexible adjustment of the light source's position and angle to accommodate lenses of different sizes and curvatures, ensuring optimized imaging of defects through optimized light illumination angles.

[0085] The screen 322 is positioned above the second conveyor belt 212 as a background for optical inspection, used to receive light passing through the lenses or reflected light, creating a high-contrast imaging environment. The screen 322 is typically made of a uniform, diffusely reflective material (such as white or gray screen 322), which stabilizes light distribution, reduces ambient light interference, and makes optical defects in the lenses (such as distortion or bubbles) more apparent in the image projected onto the screen 322. The screen 322 works in conjunction with the projection point light source 321 to construct a standardized optical inspection light field, ensuring the consistency of the inspection results.

[0086] In some embodiments, the curtain 322 can be mounted via a cover on the base 1, which is only illustrative here.

[0087] Area scan cameras 323 are spaced apart on the side of the second conveyor belt 212 facing away from the first conveyor belt 211 and directed toward the screen 322. They are used to capture optical images projected onto the screen 322 through lenses. The area scan cameras 323 can employ high-resolution sensors, enabling them to quickly acquire large-area two-dimensional images and record the optical characteristics of the lenses (such as anomalies in light refraction, reflection, or scattering). Through image processing algorithms (such as light field analysis, distortion detection, or deep learning models), the cameras analyze the projected image on the screen 322, identify characteristics of optical defects, such as image distortion caused by mirror distortion or abnormal light spots caused by bubbles, and record the location, type, and severity of the defects.

[0088] Reference Figure 4 In some embodiments, the conveying mechanism 2 proposed in this application further includes a carrying robot 22, and the second detection mechanism 4 includes an edge detection component 41, wherein:

[0089] The carrying robot 22 is used to carry the car rearview mirror lens and can drive the carried car rearview mirror lens to move toward or away from the edge detection component 41.

[0090] The edge detection component 41 is disposed on the periphery of the carrying robot 22 to detect the edge information of the car rearview mirror lens carried by the carrying robot 22.

[0091] In this embodiment, the carrier robot 22, as part of the conveying mechanism 2, is used to adsorb, carry, and move the rearview mirror lens. The carrier robot 22, through a programmable drive system (such as a servo motor or pneumatic drive), enables the carried lens to move precisely toward or away from the edge detection component 41. This flexible motion control ensures that the lens enters the detection area in a suitable posture and position, accommodating lenses of different sizes and shapes. The gripping mechanism of the carrier robot 22 (such as a vacuum suction cup or gripper) stably fixes the lens, preventing displacement or shaking during transportation, thereby ensuring detection accuracy.

[0092] The edge detection component 41 is located around the support robot 22 and typically includes a high-precision camera, a dedicated light source (such as a ring light source or a line light source), and an image processing system. It is specifically used to detect edge information of the lens, including edge defects (such as chipping, missing grinding, and over-grinding) and contour defects (such as dimensional deviations and step differences).

[0093] As the robotic arm 22 moves the lens into the inspection area, a dedicated light source illuminates the lens edge, highlighting the contrast of edge features. For example, a line light source can enhance the contour lines of the edge, while a ring light source can uniformly illuminate the edge area, revealing chipped edges or grinding defects.

[0094] Please continue to refer to Figure 4 In some embodiments, the edge detection component 41 proposed in this application includes an edge light source group 411 disposed around the support manipulator 22, and a first detection lens group 412 and a second detection lens group 413 respectively disposed on both sides along the conveying direction of the rearview mirror lens, wherein:

[0095] The first detection lens group 412 includes a first mounting post 4121 disposed on the base 1, and a first line scan camera 4122 and a second line scan camera 4123 disposed on the first mounting post 4121. The second line scan camera 4123 is disposed at intervals below the first line scan camera 4122.

[0096] The second detection lens group 413 includes a second mounting post 4131 disposed on the base 1, and a third line scan camera 4132 and a fourth line scan camera 4133 disposed on the second mounting post 4131. The fourth line scan camera 4133 is disposed at intervals below the third line scan camera 4132.

[0097] The first line array camera 4122 and the third line array camera 4132 are used to detect the edge of the upper surface of the rearview mirror lens, respectively; the second line array camera 4123 and the fourth line array camera 4133 are used to detect the edge of the lower surface of the rearview mirror lens, respectively.

[0098] In this embodiment, the edge light source group 411 is disposed around the periphery of the supporting robot arm 22. It typically employs a ring light source, line light source, or strip light source to provide high-intensity, uniform illumination, optimizing lighting for the edge areas of the upper and lower surfaces of the lens. The edge light source group 411 enhances the contrast of the lens edges through specific illumination angles and intensities, highlighting edge defects (such as chipped cracks, rough surfaces from unpolished areas, and abnormally smooth areas from over-polished areas) and contour features (such as dimensional deviations and step differences). The arrangement of the light source group ensures that the edge areas of the upper and lower surfaces of the lens are simultaneously adequately illuminated, avoiding shadows or reflections and providing a clear and stable light field environment for subsequent camera imaging.

[0099] The first detection lens group 412 includes a first mounting post 4121, a first line scan camera 4122 and a second line scan camera 4123, which are mounted on the base 1 and located on one side of the lens transport direction.

[0100] The first linear scan camera 4122 is mounted on the first mounting post 4121, facing the edge of the upper surface of the lens, and is specifically designed to capture images of the upper surface edge. The linear scan camera acquires high-resolution images through line-by-line scanning, making it suitable for detecting minute defects (such as chipping, missing wear) and contour deviations at the edge of the lens.

[0101] The second line scan camera 4123 is positioned at intervals below the first line scan camera 4122, facing the edge of the lower surface of the lens, to capture images of the lower surface edge, and similarly detects defects and contour features of the lower surface edge by line-by-line scanning.

[0102] Two line scan cameras work together, using high-precision imaging and image processing algorithms (such as edge detection, geometric measurement, or deep learning models) to analyze the type, location, and severity of defects on the edges of the upper and lower surfaces.

[0103] The second detection lens group 413 includes a second mounting post 4131, a third line array camera 4132 and a fourth line array camera 4133, which are mounted on the base 1 and located on the other side of the lens conveying direction, opposite to the first detection lens group 412.

[0104] The third linear array camera 4132 is mounted on the second mounting post 4131, facing the edge of the upper surface of the lens, forming a symmetrical detection with the first linear array camera 4122, capturing images of the edge of the upper surface from different angles, increasing the detection coverage and accuracy.

[0105] The fourth line array camera 4133 is spaced below the third line array camera 4132, facing the edge of the lower surface of the lens, and works in conjunction with the second line array camera 4123 to detect defects and contour features on the edge of the lower surface.

[0106] The second detection lens group 413, through collaborative imaging with the first detection lens group 412, acquires multi-view edge images from both sides of the lens, comprehensively detects edge defects, and reduces blind spots.

[0107] Please continue to refer to Figure 4 In some embodiments, the edge light source group 411 proposed in this application includes at least four edge light sources 4111 spaced apart around the periphery of the carrying robot arm 22.

[0108] In this embodiment, the edge light source group 411 includes at least four edge light sources 4111, which are evenly distributed around the periphery of the robot arm 22 to form an illumination layout surrounding the lens. These light sources may be ring light sources, line light sources, or strip light sources, and the specific type is optimized according to the detection requirements.

[0109] Each edge light source 4111 provides high-intensity directional or diffused lighting, illuminating the edge area of ​​the lens from different angles, enhancing the light reflection or scattering effect on the upper and lower surface edges, highlighting edge defects (such as chipped cracks, rough surfaces with unpolished areas, and abnormally smooth areas with over-polished areas) and contour features (such as dimensional deviations and step differences).

[0110] The spaced distribution of multiple light sources ensures all-around illumination of the lens edges, covering multiple sides and angles of the lens, reducing problems such as shadows, reflections, or blind spots caused by insufficient or uneven lighting.

[0111] Reference Figure 5 In some embodiments, the second testing mechanism 4 proposed in this application includes:

[0112] A backlight source 42 is located on the base 1 and can hold a car rearview mirror lens.

[0113] The contour detection assembly 43 is mounted on the base 1 via a third adjustment bracket and includes a contour light source group 431 and a contour detection camera 432. The contour light source group 431 is spaced above the backlight light source 42, and the car rearview mirror lens can pass between the backlight light source 42 and the contour light source group 431. The contour detection camera 432 is spaced above the contour light source group 431 and is used to detect the entire circumference contour of the car rearview mirror lens.

[0114] In this embodiment, the backlight source 42 is disposed on the base 1, located below the lens, providing uniform, high-contrast backlight illumination. It typically employs a surface light source or a diffused light source, and a car rearview mirror lens can be placed on the backlight source 42. By illuminating the lens from below, the backlight source 42 creates a clear silhouette effect of the lens outline, making the entire circumference of the lens present a high-contrast distinction between light and dark areas in the image. This illumination method highlights the geometric contour of the lens, facilitating the detection of contour defects such as dimensional deviations and step differences. The uniformity and stability of the backlight source 42 ensure that the contour image is free from light and shadow interference, providing a reliable light field environment for subsequent camera imaging.

[0115] The contour detection assembly 43 is mounted on the base 1 via a third adjustment bracket and includes a contour light source group 431 and a contour detection camera 432. Its position can be flexibly adjusted to adapt to different lens specifications.

[0116] Contour light source group 431 is spaced above backlight light source 42, typically using ring light source or strip light source, to provide auxiliary illumination from above or above the side of the lens. The lens passes through the gap between backlight light source 42 and contour light source group 431. Contour light source group 431 enhances the local contrast of the lens edge, helps to highlight contour details (such as step differences or edge irregularities), and compensates for the limitations of backlight light source 42 under certain complex contours.

[0117] Contour detection cameras 432 are spaced above contour light source group 431, facing the lens and backlight source 42, and use high-resolution sensors (such as area scan camera 323 or line scan camera) to capture images of the entire circumference contour of the lens.

[0118] The camera acquires a high-resolution contour image through the contour silhouette formed by the backlight source 42 and the auxiliary illumination of the contour light source group 431. Image processing algorithms (such as contour extraction, geometric measurement, or deep learning models) analyze the image data, accurately measure the size, shape, and step difference of the lens, and identify contour defects (such as size deviation and edge unevenness).

[0119] Reference Figure 6 In some embodiments, the automotive rearview mirror lens visual inspection device proposed in this application further includes a transfer mechanism 5 for transferring the automotive rearview mirror lens between the first inspection mechanism 3 and the second inspection mechanism 4, the transfer mechanism 5 including;

[0120] The transverse drive component 51 is mounted on the base 1;

[0121] The suction cup 52 is located at the output end of the transverse drive 51 and is used to attract and release the rearview mirror lens of the car.

[0122] The lateral drive component 51 is used to drive the suction cup hand to transfer the car rearview mirror lens between the first detection mechanism 3 and the second detection mechanism 4.

[0123] In this embodiment, the lateral movement drive 51 is mounted on the base 1 and typically employs a linear drive device (such as a servo motor, linear guide, or pneumatic slide) to provide high-precision horizontal movement capability. The lateral movement drive 51, through programmable control, drives the suction cup 52 at its output end to move rapidly and smoothly laterally along a specific path between the first detection mechanism 3 (such as the surface and optical detection area) and the second detection mechanism 4 (such as the edge and contour detection area).

[0124] The suction cup 52 is located at the output end of the transverse drive 51 and typically employs a vacuum suction cup or multi-point adsorption device to firmly adsorb and release automotive rearview mirror lenses. During the transfer process, the suction cup 52 uses vacuum adsorption technology to grip the lens surface, ensuring stability and safety of the grip and preventing scratches or damage to the lens. The release function of the suction cup 52 precisely places the lens in the detection area of ​​the second detection mechanism 4 by controlling the vacuum pressure, cooperating with the positioning of the transverse drive 51 to complete the inter-station transfer.

[0125] 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 visual inspection device for automotive rearview mirror lenses, characterized in that, include: Base: A conveying mechanism, located on the base, is used to carry and convey automotive rearview mirror lenses; A first inspection mechanism and a second inspection mechanism are arranged at intervals along the lens conveying direction. The first inspection mechanism is used to detect defect information of the automotive rearview mirror lens, and the second inspection mechanism is used to detect contour information of the automotive rearview mirror lens.

2. The automotive rearview mirror lens visual inspection device according to claim 1, characterized in that, The conveying mechanism includes a conveyor belt, and the first detection mechanism includes a surface defect detection component straddling the upper side of the conveyor belt, the surface defect detection component being used to detect surface defects of the automotive rearview mirror lens.

3. The automotive rearview mirror lens visual inspection device according to claim 2, characterized in that, The surface defect detection component includes: A surface inspection camera, which is fixed above the conveyor belt by a first adjustable bracket; A coaxial light source is mounted on the first adjustable bracket, and the coaxial light source is located between the lens and the lens element of the surface detection camera; Two scattering light sources are mounted on the first adjustable bracket. The two scattering light sources are symmetrically distributed on both sides of the surface inspection camera and are both directed toward the conveyor belt.

4. The automotive rearview mirror lens visual inspection device according to claim 2 or 3, characterized in that, The conveyor belt includes a first conveyor belt and a second conveyor belt that are connected to each other. The surface defect detection component is disposed on the upper side of the first conveyor belt. The first detection mechanism also includes an optical defect detection component, which is disposed on the upper side of the second conveyor belt, for detecting optical defects in the automotive rearview mirror lens.

5. The automotive rearview mirror lens visual inspection device according to claim 4, characterized in that, The optical defect detection component includes: A projection point light source is fixed above the conveyor belt by a first adjustable bracket, and the light-emitting surface of the projection point light source is arranged facing the second conveyor belt. A curtain is installed on the upper side of the second conveyor belt; A field scan camera is spaced apart on the side of the second conveyor belt opposite to the first conveyor belt, and the field scan camera is positioned facing the screen.

6. The visual inspection device for automotive rearview mirror lenses according to claim 2, characterized in that, The conveying mechanism further includes a carrying robot, and the second detection mechanism includes an edge detection component, wherein: The carrying manipulator is used to carry the rearview mirror lens of the car and can drive the carried rearview mirror lens to move toward or away from the edge detection component. The edge detection component is disposed on the periphery of the carrying manipulator and is used to detect the edge information of the car rearview mirror lens carried by the carrying manipulator.

7. The automotive rearview mirror lens visual inspection device according to claim 6, characterized in that, The edge detection component includes an edge light source group disposed around the periphery of the carrying robot, and a first detection lens group and a second detection lens group respectively disposed on both sides along the conveying direction of the automotive rearview mirror lens, wherein: The first detection lens group includes a first mounting post disposed on the base, and a first line scan camera and a second line scan camera disposed on the first mounting post, wherein the second line scan camera is disposed at intervals below the first line scan camera; The second detection lens group includes a second mounting post disposed on the base, and a third line array camera and a fourth line array camera disposed on the second mounting post, wherein the fourth line array camera is disposed at intervals below the third line array camera; The first and third line array cameras are used to detect the edges of the upper surface of the rearview mirror lens; the second and fourth line array cameras are used to detect the edges of the lower surface of the rearview mirror lens.

8. The automotive rearview mirror lens visual inspection device according to claim 7, characterized in that, The edge light source group includes at least four edge light sources spaced apart around the periphery of the carrying robot.

9. The automotive rearview mirror lens visual inspection device according to claim 1, characterized in that, The second testing institution includes: A backlight source is provided on the base, which can hold a car rearview mirror lens; The contour detection assembly, mounted on the base via a third adjustment bracket, includes a contour light source group and a contour detection camera. The contour light source group is spaced apart above the backlight source, and the car rearview mirror lens can pass between the backlight source and the contour light source group. The contour detection camera is spaced apart above the contour light source group and is used to detect the entire circumference contour of the car rearview mirror lens.

10. The automotive rearview mirror lens visual inspection device according to claim 1, characterized in that, The automotive rearview mirror lens visual inspection equipment further includes a transfer mechanism for transferring the automotive rearview mirror lens between the first inspection mechanism and the second inspection mechanism, the transfer mechanism including; A transverse drive component is disposed on the base; A suction cup is located at the output end of the transverse drive component to attract and release the rearview mirror lens. The lateral drive is used to drive the suction cup hand to transfer the car rearview mirror lens between the first detection mechanism and the second detection mechanism.

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