Noise inspection device for automobile visual inspection system

Abstract

The invention relates to an automobile visual inspection system noise inspection device which comprises a support, a movable module is connected to the support and comprises a base of a frame structure, a display panel is arranged on the base and comprises at least two vertically-distributed plate bodies, the top plate body is made of transparent materials, a movable groove is formed between the upper plate body and the lower plate body, and the movable groove is communicated with the movable module. A plurality of movable grooves are transversely distributed at intervals, each movable groove is of a front-back through hole groove structure, a pattern belt is arranged in each movable groove in a penetrating mode, each pattern belt is of an annular belt body structure, the pattern belts are in transmission connection with a rotary driving part arranged on the base, and the pattern belts are provided with signal source styles needed by inspection of an automobile visual inspection system. And the rotary driving piece can control the pattern belt to rotate, so that the pattern of the signal source in the display panel is changed. The problems that image information sources provided by some existing visual inspection system noise inspection devices are uncontrollable, the intensity is difficult to quantitatively adjust, and effective threshold comparison is difficult to perform are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of detection devices in the field of automobiles, in particular to a noise testing device for an automobile vision detection system. BACKGROUND

[0002] The automobile vision detection system is a core technology for inspecting automobile parts, vehicle body contour, vehicle paint, etc. in the vehicle production and manufacturing process. When the automobile vision detection system collects images for measurement and reconstruction, due to the influence of image noise, there is a deviation between the actual imaging feature points of the vehicle body to be inspected and the feature points obtained from the image, which affects the accuracy of the automobile vision detection.

[0003] Among them, image noise mainly refers to the phenomenon of image quality degradation caused by various interference factors during image acquisition, transmission or processing, which is manifested as random or non-random pixel value abnormal change in the image. These noises can mask or distort the real information in the image, thereby affecting the detection accuracy and reliability of the system. The sources of image noise include sensor noise, environmental interference, etc.

[0004] In order to ensure the detection accuracy of the automobile vision detection system, noise testing needs to be carried out regularly. During the testing process, some devices need to be used, such as the patent CN113740074A discloses a noise testing device for an automobile vision detection system, which aims to solve the problem of distortion coefficient measurement of the automobile appearance measurement system based on the centripetal adjustment mechanism. The noise testing device for the automobile vision detection system mainly comprises piezoelectric vibrators, columns, transparent plates, noise simulation particles and a base. One end of each of the four piezoelectric vibrators is placed on the top surface of the four columns and is threadedly connected with the columns, and the other end of each of the four piezoelectric vibrators is clamped by the recesses on both sides of the two transparent plates in which the noise simulation particles are placed.

[0005] In the above technical solution, the noise simulation particles are mainly provided as the image information source of the vision detection system. However, in the technical solution, the particles are vibrated by the piezoelectric vibrators, and the distribution of the particles is random but uncontrollable, so it is difficult to quantitatively adjust the noise intensity formed by the particles and to compare and judge with the standard threshold. Therefore, a new noise testing device is needed to solve the above-mentioned defects. SUMMARY

[0006] The present application provides a noise testing device for an automobile vision detection system, which is advantageous to solve the problem that the image information source provided by some existing noise testing devices for vision detection systems is uncontrollable, difficult to quantitatively adjust the intensity and effectively compare the threshold.

[0007] The present application is implemented as follows: A noise testing device for an automotive vision inspection system includes a bracket with a movable module connected to it. The movable module includes a base with a frame structure and a display panel on the base. The display panel includes at least two vertically distributed plates. The top plate is made of a transparent material, and a movable groove is provided between the upper and lower plates. Several movable grooves are horizontally spaced. The movable grooves are through-hole grooves with a front and rear hole structure, and a pattern strip is threaded through the movable groove. The pattern strip is an annular strip structure and is connected to a rotary drive component mounted on the base. The pattern strip has the signal source pattern required for the automotive vision inspection system. The rotary drive component can control the rotation of the pattern strip, causing the signal source pattern in the display panel to change.

[0008] Based on the above technical solution, a hinge structure is provided at the connection between the movable module and the support. The support is also provided with several spaced perforations that pass through the support laterally. A support rod is inserted through the perforation, and the support rod and the bottom of the base can form an angle limiting structure for the movable module.

[0009] Based on the above technical solution, the display panel includes an upper panel and a lower panel that are attached and abutted together, the upper panel being a transparent panel and the lower panel being a light-emitting panel.

[0010] Based on the above technical solution, the upper and lower ends of the movable groove are flat end faces, the pattern strip is clearance-fitted with the upper and lower ends of the movable groove, and the left and right sides of the movable groove form a limiting structure for the pattern strip.

[0011] Based on the above technical solution, the pattern strip is composed of an anti-slip layer, a skeleton layer, a printing layer, and a wrapping layer.

[0012] Based on the above technical solution, a magnetic attraction structure is provided between the support rod and the bottom of the base.

[0013] Based on the above technical solution, the signal source pattern is set on the printed layer.

[0014] Compared with the prior art, the present invention has at least the following advantages: 1. This invention, through the design of the pattern strip and the rotating drive component, enables precise control of the signal source pattern displayed on the screen. Operators can flexibly adjust the rotation speed and direction of the pattern strip, as well as the characteristics of the signal source pattern, according to actual inspection needs, thereby achieving precise control of the image information source. This controllability allows the device to simulate various complex noise scenarios, meeting the noise inspection requirements of different automotive vision inspection systems under different inspection tasks, greatly improving the applicability and flexibility of the device.

[0015] 2. The device of this invention enables quantitative adjustment of noise intensity. By changing parameters such as the distribution density, size, and contrast of the signal source pattern on the pattern strip, and controlling the rotation speed of the pattern strip, noise interference of different intensities can be accurately simulated. During actual inspection, operators can gradually adjust the noise intensity according to a pre-set standard threshold, observe the changes in the detection performance of the automotive vision inspection system under different noise intensities, and thus accurately assess its noise tolerance and detection accuracy. This quantitative adjustment function provides precise data support for the performance evaluation and optimization of the automotive vision inspection system, contributing to improving the overall quality of the automotive vision inspection system.

[0016] 3. Because the device of this invention can quantitatively adjust the noise intensity and precisely control the image information source, it can easily compare and judge the inspection results with standard thresholds. During the inspection process, the device can gradually increase the noise intensity according to a preset inspection procedure, recording the inspection data of the automotive vision inspection system under different noise intensities. By comparing and analyzing these data with standard thresholds, it is possible to clearly determine whether the automotive vision inspection system meets the quality requirements and its performance under different noise conditions. This comparison and judgment method is intuitive and accurate, and can promptly identify problems in the automotive vision inspection system, providing a clear direction for system improvement and optimization. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a vehicle vision inspection device for noise testing in one embodiment. Figure 2 for Figure 1 A cross-sectional view of the active module; Figure 3 for Figure 2 A magnified view of part A in the image; Figure 4 for Figure 1 A 3D view of the internal structure of the activity module; Figure 5 A schematic diagram of the transmission structure for a single patterned belt; Figure 6 This is a schematic diagram of the hierarchical structure of the pattern strip; Figure 7 This is a schematic diagram of the distribution structure of a point signal source in one embodiment.

[0019] The diagram is labeled as follows: 100, bracket; 110, perforation; 120, strut; 200, base; 300, display panel; 310, upper plate; 320, lower plate; 330, movable groove; 400, pattern strip; 410, anti-slip layer; 420, skeleton layer; 430, printing layer; 440, wrapping layer; 500, motor; p, dot signal source. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0021] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Combination Figures 1-7 As shown, this embodiment discloses a noise testing device for an automotive vision inspection system, which effectively solves the problems of uncontrollable image information sources, difficulty in quantitatively adjusting intensity, and inability to effectively perform threshold comparison in some existing noise testing devices for vision inspection systems. This improves the accuracy, reliability, and flexibility of noise testing for automotive vision inspection systems, and provides strong support for the performance evaluation and optimization of automotive vision inspection systems.

[0025] CombinationFigure 1 and Figure 2 As shown, the noise testing device for the automotive vision inspection system in this embodiment mainly includes a bracket 100, a movable module, a display panel 300, a pattern strip 400, and a rotation drive component. All components work together to achieve accurate testing of the noise of the automotive vision inspection system.

[0026] The bracket 100 serves as the supporting structure for the entire device, providing a stable installation base for the movable module. The bracket 100 is made of aluminum alloy square tubing, with an overall "U" shape on the front and a side profile that is narrower at the top and wider at the bottom.

[0027] The movable module includes a frame-structured base 200, on which a display panel 300 is mounted. This frame-structured base 200 is rationally designed, providing a stable mounting space for the display panel 300 and other related components, ensuring the stability of the entire device during operation. The left and right sides of the base 200 are hinged to the top of the support 100 via connecting shafts, allowing the base 200 to drive the entire movable module to rotate and swing relative to the support 100 within a certain angle range.

[0028] The bracket 100 is also provided with several spaced-apart perforations 110, which transversely penetrate the bracket 100. A support rod 120 passes through each perforation 110, and the support rod 120 and the bottom of the base 200 form an angle-limiting structure for the movable module. Specifically, the bottom of the base 200 is made of iron sheet, and a permanent magnet is installed on the support rod 120, forming a magnetic attraction structure between them. By adjusting the position of the support rod 120 in different perforations 110, the bottom of the base 200 can abut against the magnetically attracted support rod 120 at different positions. The support rod 120 not only supports the base 200 but also precisely controls the rotation angle of the movable module and fixes the angle. This angle adjustment function is of great significance in practical applications because different automotive vision inspection systems may have different viewing angle requirements during inspection. By adjusting the angle of the movable module, the signal source pattern presented by the display panel 300 can better simulate the image information in the actual inspection scenario, thereby improving the accuracy and relevance of noise inspection.

[0029] Combination Figure 2 and Figure 3 As shown, the display panel 300 includes an upper panel 310 and a lower panel 320 that are attached and abutted together. The upper panel 310 is a transparent panel, and the lower panel 320 is a light-emitting panel. The transparent panel is made of high-transparency acrylic sheet, which ensures that the signal source pattern presented on the pattern strip 400 is clearly visible and will not cause image blurring or distortion due to material issues. The light-emitting panel is a non-transparent acrylic sheet equipped with LED light strips, which can provide uniform background illumination for the display panel 300, so that the signal source pattern can be clearly displayed under different ambient light conditions, enhancing the adaptability and reliability of the device.

[0030] A movable groove 330 is provided between the upper and lower plates 320. In this embodiment, five movable grooves 330 are distributed laterally at intervals, and each movable groove 330 has a front and rear through-hole groove structure. This design of the movable groove 330 provides reasonable space for the installation and movement of the pattern strip 400, allowing the pattern strip 400 to move and rotate smoothly within the movable groove 330. The upper and lower ends of the movable groove 330 are flat end faces, and the pattern strip 400 is clearance-fitted with the upper and lower ends of the movable groove 330. This clearance fit ensures that the pattern strip 400 can move freely within the movable groove 330, and the flat end faces of the upper and lower ends of the movable groove 330 also provide a certain limiting effect on the pattern strip 400, preventing the pattern strip 400 from swaying or deviating during movement, thus ensuring the stability of the signal source pattern presentation. The left and right sides of the movable groove 330 also constitute a limiting structure for the pattern strip 400, further limiting the movement range of the pattern strip 400 and ensuring that it runs within the specified track, thereby accurately presenting the required signal source pattern.

[0031] Furthermore, in combination Figure 4 and Figure 5 As shown, the pattern strip 400 is an annular belt structure, passing through the movable groove 330 and connected to a rotary drive component mounted on the base 200. The rotary drive component is specifically a motor 500, which controls the rotation of the pattern strip 400, causing changes in the signal source pattern within the display panel 300. This design allows the device to simulate the effects of different types and intensities of noise on automotive vision inspection systems. By changing the rotational speed and direction of the pattern strip 400, as well as the distribution and characteristics of the signal source patterns on the pattern strip 400, various complex noise scenarios can be simulated, thereby meeting the inspection requirements of different automotive vision inspection systems. Figure 7 The point signal sources p on each pattern band together form a rectangular pattern.

[0032] like Figure 6As shown, the pattern strip 400 consists of an anti-slip layer 410, a skeleton layer 420, a printing layer 430, and a wrapping layer 440. The anti-slip layer 410, located at the bottom of the pattern strip 400, is made of rubber and has a textured surface for anti-slip. Its main function is to increase the friction between the pattern strip 400 and the output end of the motor 500, preventing slippage during rotation and ensuring accurate control of the pattern strip 400's movement by the rotary drive. The skeleton layer 420 provides structural support for the pattern strip 400. Made of rubber, its elasticity is lower than that of the anti-slip layer 410. The skeleton layer 420 ensures that the pattern strip 400 is not easily deformed during long-term use, maintaining the stability of its annular belt structure. The printing layer 430 is the core part of the pattern strip 400; the signal source patterns required for inspection by the automotive vision inspection system are set on the printing layer 430. Through precise printing processes, various complex and accurate signal source patterns, such as patterns or marks of different shapes, sizes, and colors, can be presented on the printed layer 430. These signal source patterns can simulate the characteristics of automotive parts, outer contours, etc., in actual images, providing a real and reliable information source for noise inspection. The wrapping layer 440, located outside the printed layer 430, is made of PE film and serves a protective function to prevent the signal source patterns from wearing off.

[0033] It should be noted that the signal source patterns on the pattern strip 400 are key elements of the device of this invention for inspecting noise in automotive vision inspection systems. These signal source patterns are carefully designed according to the actual inspection needs of automotive vision inspection systems, and can simulate the features of automotive parts, the overall vehicle outline, and paint in actual images. For example, signal source patterns can be designed to simulate features such as scratches, unevenness, and color differences on the surface of a car body. By changing parameters such as the distribution density, size, and contrast of these signal source patterns, different levels of noise interference effects can be simulated. When the rotation drive controls the rotation of the pattern strip 400, the signal source patterns dynamically change on the display panel 300, thereby simulating the dynamic characteristics of image noise during actual inspection. This allows the automotive vision inspection system to more realistically handle various noise scenarios during inspection, improving the accuracy and reliability of inspection results. Figure 7 The image shows a dotted signal source p. In other embodiments, the signal source pattern can also be composed of lines or block structures, or it can simulate a dust or atomized environment by setting uniformly sprayed fine particles.

[0034] In the specific implementation process, this testing device is placed within the image acquisition area of ​​the automotive vision inspection system to be tested, and the angle of the base 200 is adjusted as needed. According to the pre-set testing plan, the rotation parameters of the pattern strip 400 are gradually adjusted, such as gradually increasing the rotation speed from low to high speed, or changing the rotation direction. Simultaneously, parameters such as the distribution density, size, and contrast of the signal source patterns on the pattern strip 400 can be adjusted to simulate noise interference of different intensities and types. After each parameter adjustment, the detection data of the automotive vision inspection system is recorded, such as the accuracy of feature point extraction, measurement error, and image recognition rate. These data are compared and analyzed with pre-set standard thresholds to determine whether the performance of the automotive vision inspection system under the current noise conditions meets the requirements. Based on the test results, the automotive vision inspection system is evaluated. If the detection data exceeds the standard threshold range, it indicates that the system has performance problems under the corresponding noise conditions, requiring further inspection and optimization of system parameters or hardware equipment. If the detection data are all within the standard threshold range, it indicates that the system can work normally under the current noise conditions and has a certain noise tolerance capability.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A noise testing device for an automotive vision inspection system, characterized in that, The system includes a bracket (100), on which a movable module is connected. The movable module includes a base (200) with a frame structure. A display panel (300) is provided on the base (200). The display panel (300) includes at least two plates distributed vertically. The top plate is made of transparent material. A movable groove (330) is provided between the upper and lower plates (320). Several movable grooves (330) are distributed horizontally at intervals. The movable grooves (330) are through-hole groove structures. A pattern strip (400) is inserted inside the movable grooves (330). The pattern strip (400) is an annular strip structure. The pattern strip (400) is connected to a rotating drive component on the base (200). The pattern strip (400) has the signal source pattern required for inspection by the automotive vision inspection system. The rotating drive component can control the rotation of the pattern strip (400), so that the signal source pattern inside the display panel (300) changes.

2. The noise testing device for an automotive vision inspection system according to claim 1, characterized in that, The connection between the movable module and the support (100) is provided with a hinge structure. The support (100) is also provided with a number of spaced perforations (110). The perforations (110) pass through the support (100) laterally. A support rod (120) passes through the perforation (110). The support rod (120) and the bottom of the base (200) can form an angle limiting structure for the movable module.

3. The noise testing device for an automotive vision inspection system according to claim 1, characterized in that, The display panel (300) includes an upper panel (310) and a lower panel (320) that are attached to each other. The upper panel (310) is a transparent panel, and the lower panel (320) is a light-emitting panel.

4. The noise testing device for an automotive vision inspection system according to claim 1, characterized in that, The upper and lower ends of the movable groove (330) are flat end faces. The pattern strip (400) is in clearance fit with the upper and lower ends of the movable groove (330). The left and right sides of the movable groove (330) form a limiting structure for the pattern strip (400).

5. The noise testing device for an automotive vision inspection system according to claim 1, characterized in that, The pattern strip (400) is composed of an anti-slip layer (410), a skeleton layer (420), a printing layer (430), and a wrapping layer (440).

6. The noise testing device for an automotive vision inspection system according to claim 2, characterized in that, A magnetic attraction structure is provided between the support rod (120) and the bottom of the base (200).

7. The noise testing device for an automotive vision inspection system according to claim 5, characterized in that, The signal source pattern is set on the printed layer (430).

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