Test method for detecting the riveting stability of connectors in servers

Abstract

The present application discloses a test method for detecting the riveting stability of connectors in a server, comprising uniformly coloring the plug-in and unplug-out ends of the connector and drying them; fixing the connector on a test bench, photographing the connector once and recording an initial image; performing a plug-in test on the connector and fixing the connector on the test bench again to photograph it a second time and record an actual image; an image processing system compares the two images and outputs a friction distance, a friction area, and a maximum color difference value; comparing the friction distance, friction area, and maximum color difference value of each test area with a preset standard threshold value for connector riveting stability, and determining whether the riveting stability of the connector in each test area meets the standard. The present application solves many challenges faced in the related art when testing the riveting stability of connectors, including the limitations of the test range, the lack of measurement accuracy, the singleness of the test indicators, and the low test efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of connector riveting stability testing, and in particular to a testing method for detecting the riveting stability of connectors in a server. Background Art

[0002] In the server manufacturing field, connector riveting stability is one of the key factors to ensure data transmission efficiency and system reliability. Existing test methods, such as the test of connector friction distance for gold finger structures, can only evaluate straight-type gold finger connectors. Their limitations are:

[0003] 1. Limited test scope: Existing technology is only applicable to connectors with straight-type gold finger structures. It cannot effectively test connectors with other special-shaped gold finger structures or non-gold finger structures, such as high-density, high-speed transmission interfaces. This limits the widespread application of the test method, especially in the fields of high-performance computing and data centers, where connector structures are more complex and require higher riveting stability.

[0004] 2. Insufficient measurement accuracy: Existing friction distance testing relies on manual reading of vernier calipers. This manual process is subject to significant subjective bias, limiting the accuracy of measurement data. Especially in micron-level precision measurements, even tiny deviations can affect the reliability of test results, making it impossible to meet the high-precision testing requirements of modern servers.

[0005] 3. Single test metric: Existing connector riveting stability is measured solely based on friction distance. This single test standard fails to fully reflect the connector's actual operating conditions, potentially leading to erroneous evaluation results and impacting the server's overall performance and stability.

[0006] 4. Low test efficiency: The existing testing process is cumbersome and requires manual operation of multiple steps, including coloring, plugging and unplugging, and measurement. This is not only time-consuming but also prone to human errors, reducing test efficiency and accuracy. Summary of the Invention

[0007] The present application provides a testing method for detecting the riveting stability of connectors in servers, so as to at least solve the many challenges faced in the related art when testing the riveting stability of connectors in servers, including the limitations of the test range, insufficient measurement accuracy, single test indicators and low test efficiency.

[0008] The present application provides a testing method for detecting the riveting stability of connectors in a server, comprising: uniformly coloring the plug-in end of the connector with a colorant and drying the colorant so that the color layer is completely cured; fixing the colored and dried connector on a test bench using a fixing fixture, adjusting a first parameter of a camera to a first preset parameter, and adjusting a second parameter of a light source to a second preset parameter, photographing the connector once, and recording an initial image of the connector; performing a plug-in test on the connector after the initial image is photographed, by inserting the plug-in end into a mating end on a server and then removing it, and visually observing whether obvious friction marks are generated on the surface of the plug-in end; fixing the connector after the plug-in and unplugging operation again on the test bench using a fixing fixture, photographing the connector a second time, and recording an actual image of the connector; importing the initial image and the actual image into an image processing system for difference comparison, manually selecting at least three test areas, and the image processing system calculating and outputting the friction distance, friction area, and maximum color difference value corresponding to each test area based on the difference between the initial image and the actual image; and comparing the friction distance, friction area, and maximum color difference value of each test area with a preset standard threshold value for connector riveting stability to determine whether the connector riveting stability of each test area meets the standard.

[0009] In an exemplary embodiment, the thickness of the colored layer does not exceed 0.1 mm.

[0010] In an exemplary embodiment, during the second photographing of the connector that has completed the plugging and unplugging operation, the placement of the connector, the first parameters of the camera, and the second parameters of the light source are all consistent with those in the first photographing process.

[0011] In an exemplary embodiment, the first parameter includes at least a shooting angle of the camera and a position of the camera.

[0012] In an exemplary embodiment, the second parameter includes at least the brightness of the light source and the position of the light source.

[0013] In an exemplary embodiment, the manually selected test area includes at least two end positions of the plug-in end in the length direction of the connector and a middle position of the plug-in end in the length direction of the connector.

[0014] In an exemplary embodiment, the method for calculating the friction distance includes dividing the test area into a grid and setting the friction process direction of the connector as the X-axis; comparing the difference point A and the difference point B in the test area by pixel difference, marking the pixel coordinates of the difference point A and the difference point B as A(x1, y1) and B(x2, y2) respectively, and defining the absolute distance between the difference point A and the difference point B in the X-axis as the friction distance D. x =|X2-X1|.

[0015] In an exemplary embodiment, the method for calculating the maximum color difference value includes obtaining the RGB value of each pixel in the test area; then, the color difference value of the same pixel before and after the plug end is: , where (R1, G1, B1) is the RGB value of the pixel extracted by the first shot before the plug-in test, and (R2, G2, B2) is the RGB value of the same pixel extracted by the second shot after the plug-in test; then, the maximum color difference value output by the test area is ΔE=MAX(ΔE1, ΔE2, ΔE3 ……, ΔE i ).

[0016] In an exemplary embodiment, during the coloring pre-treatment of the plug-in end of the connector, the plug-in end is completely immersed in an erasable colorant, and the plug-in end is naturally dried in a dust-free environment.

[0017] In an exemplary embodiment, determining whether the riveting stability of the connector in each test area meets the standard includes determining that the riveting stability of the test area meets the standard if the friction distance, friction area, and maximum color difference value in the same test area are all greater than the corresponding standard thresholds; if the riveting stability of all test areas selected for the same connector meets the standard, then determining that the riveting stability of the connector meets the standard.

[0018] The present application provides a test method for detecting the riveting stability of connectors in a server, comprising uniformly coloring the plug-in end of the connector with a colorant and drying the coloring layer so that the coloring layer is completely solidified; fixing the colored and dried connector on a test operating table by a fixing fixture, adjusting a first parameter of a camera to a first preset parameter, and adjusting a second parameter of a light source to a second preset parameter, photographing the connector once and recording an initial image of the connector; performing a plug-in test on the connector that has been photographed once, inserting the plug-in end into the mating end on the server and then pulling it out, and visually observing whether there is obvious friction on the surface of the plug-in end. The connector that has completed the plugging and unplugging operation is fixed on the test bench again by a fixing fixture, and the connector is photographed for the second time and the actual image of the connector is recorded; the initial image and the actual image are imported into the image processing system for difference comparison, and at least three test areas are manually selected. The image processing system calculates and outputs the friction distance, friction area, and maximum color difference value corresponding to each test area based on the difference between the initial image and the actual image; the friction distance, friction area, and maximum color difference value of each test area are compared one by one with the preset standard threshold value of the connector riveting stability to determine whether the riveting stability of the connector in each test area meets the standard.

[0019] Based on the first and second shots taken before and after plugging and unplugging, the image processing system calculates the difference between the initial image and the actual image, thereby outputting the friction distance, friction area and maximum color difference value corresponding to each test area. The change in color difference can form a judgment basis for detecting the clamping force of the connector, thereby effectively testing the riveting stability of the plugging and unplugging ends of the connector before and after plugging and unplugging in combination with the friction distance, friction area and clamping force. The test method of the present application is applicable to most connectors and has strong versatility, which greatly improves the accuracy and reliability of the test method, so that the key quantifiable indicators of the riveting stability of the connector are friction distance, friction area, and maximum color difference value (that is, intuitive detection of clamping force), which solves the many challenges faced in the prior art when testing the riveting stability of connectors in servers, including the limitations of the test range, insufficient measurement accuracy, single test indicators and low test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A flow chart of a testing method provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram showing the grid division of the selected test area for this application to calculate the absolute distance between difference point A and difference point B along the X-axis;

[0023] Figure 3 This is a schematic diagram of the preferred location of the test area of ​​the plug-in and plug-out ends of the connector of the present application.

[0024] The above drawings include the following reference numerals:

[0025] 10. Connector; 11. Test area; DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] It should be noted that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely for ease of description and simplification of the present application. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present application. The terms "mounted," "connected," and "connected" should be interpreted broadly, and may include, for example, fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. The terms "parallel," "perpendicular," and "equal" encompass the described conditions and conditions similar to the described conditions, provided that the range of the similar conditions is within an acceptable range of deviation, as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes both absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism may be, for example, within 5°; "perpendicular" includes both absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity may also be, for example, within 5°. "Equal" includes both absolute equality and approximate equality, where the acceptable deviation range for approximate equality may be, for example, that the difference between the two is less than or equal to 5% of either. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0028] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] An embodiment of the present application provides a test method for detecting the riveting stability of connectors in a server. Combined with the working principle of the test method for detecting the riveting stability of connectors in a server, a device is described in detail (the technical terms involved must be explained).

[0030] like Figure 1As shown, the test method for detecting the riveting stability of the connector 10 in the server includes uniformly coloring the plug-in end of the connector 10 with a colorant and drying it to completely solidify the color layer; fixing the connector 10 that has been colored and dried on a test operating table by a fixing fixture, adjusting the first parameter of the camera to the first preset parameter, and adjusting the second parameter of the light source to the second preset parameter, taking a picture of the connector 10 once and recording the initial image of the connector 10; performing a plug-in test on the connector 10 that has been photographed once, by inserting the plug-in end into the mating end on the server and then pulling it out, and visually observing whether there are obvious friction marks on the surface of the plug-in end; The connector 10 undergoing the plugging and unplugging operation is fixed again on the test bench by a fixing fixture, and the connector 10 is photographed a second time and the actual image of the connector 10 is recorded; the initial image and the actual image are imported into the image processing system for difference comparison, and at least three test areas 11 are manually selected. The image processing system calculates and outputs the friction distance, friction area, and maximum color difference value corresponding to each test area 11 based on the difference between the initial image and the actual image; the friction distance, friction area, and maximum color difference value of each test area 11 are compared one by one with the preset standard threshold value of the riveting stability of the connector 10 to determine whether the riveting stability of the connector 10 in each test area 11 meets the standard.

[0031] Based on the first and second shots taken before and after plugging and unplugging, the image processing system calculates the difference between the initial image and the actual image, thereby outputting the friction distance, friction area and maximum color difference value corresponding to each test area 11. The change in color difference can form a judgment basis for detecting the clamping force of the connector 10, thereby effectively testing the riveting stability of the plugging and unplugging ends of the connector 10 before and after plugging and unplugging in combination with the friction distance, friction area and clamping force. The test method of the present application is applicable to most connectors 10, has strong versatility, and greatly improves the accuracy and reliability of the test method, so that the key quantifiable indicators of the riveting stability of the connector 10 are friction distance, friction area, and maximum color difference value (that is, intuitive detection of clamping force), which solves the many challenges faced in the prior art when testing the riveting stability of the connector 10 in the server, including the limitations of the test range, insufficient measurement accuracy, single test indicators and low test efficiency.

[0032] It should be noted that the plug-in end of the above-mentioned connector is a male contact, and the one located on the server is a female end; the fixing fixture is a fixing fixture for the sample to be tested, which is used to stabilize the position of the male contact of the connector; the colorant is stored in a container that can store liquid, which is easy to use to contain the coloring liquid and pre-process and color the male contact of the connector; the camera is a high-resolution industrial camera, which is used to capture images of the connector terminals, and the industrial camera has a built-in or external angle adjustment mechanism; the light source provides sufficient lighting environment for the industrial camera to shoot; the image processing system is used to receive image data output by the industrial camera and output processing results.

[0033] Furthermore, the female end of the connector remains mounted on the original server structure. This design simulates the connection state in a real working environment. By performing plug-in and pull-out tests within the server structure, the connector's riveting stability in actual use can be more accurately assessed, providing a practical reference for server maintenance and upgrades.

[0034] It should be noted that the structural components involved in the above-mentioned test methods are all structural components of the test system. The modular design of the test system enables it to adapt to connectors in different types of servers, improving the flexibility and applicability of testing. A fixed fixture and an adjustable industrial camera ensure connector stability and image acquisition accuracy during testing. The introduction of a light source further optimizes image quality and facilitates subsequent image processing and analysis. The intelligent analysis of the image processing system can quickly and accurately identify connector friction marks and color variations, thereby enabling automatic detection of riveting stability and significantly improving testing efficiency and accuracy.

[0035] It should be noted that in this application, the thickness of the coloring layer does not exceed 0.1mm. This pretreatment of the connector's plug-in and plug-out ends takes into account the colorant's effect on the connector's male contacts. By controlling the thickness of the coloring layer, the contrast effect of subsequent image processing is guaranteed while avoiding the potential impact of an overly thick coloring layer on the connector itself, ensuring test reliability and connector integrity.

[0036] It should be noted that in this application, during the second shooting of the connector 10 that has completed the plugging and unplugging operation, the placement of the connector 10, the first parameters of the camera, and the second parameters of the light source are all consistent with those in the first shooting process. In this way, when processing image data, the image processing system maintains the consistency of the placement of the connector, the brightness of the light source, the fixed position of the camera, and the setting parameters. The implementation of the consistency principle is to eliminate the influence of external factors on the test results. Through standardized test conditions, the comparability and repeatability of the image processing results are ensured, which is crucial for establishing a unified test standard and evaluation system.

[0037] In some embodiments, the first parameter includes at least a shooting angle of the camera and a position of the camera.

[0038] Furthermore, the test bench includes a retractable joystick connected to the camera for adjusting the position of the industrial camera. The retractable joystick's design takes into account the sizes and shapes of different connectors. By flexibly adjusting the camera's position, it ensures the optimal angle and field of view for image acquisition, improving image quality and measurement accuracy.

[0039] In some embodiments, the second parameter includes at least the brightness of the light source and the position of the light source.

[0040] like Figure 3 As shown, the manually selected test area 11 includes at least the two ends of the connector 10, where the plug-in / unplug end is located, and the middle of the connector 10. Thus, the image processing system manually selects the test area, selecting at least three locations: the two ends and the middle of the connector. The principle of manually selecting the test area is to ensure representative measurement. By targetedly measuring key parts of the connector, the connector's riveting stability can be comprehensively assessed. This method is applicable to connectors of various shapes and sizes and has wide applicability.

[0041] It should be noted that in this application, the image processing system has a friction distance measurement function, which is completed by comparing pixel differences and outputting the friction distance before and after the plugging and unplugging test. The principle of friction distance measurement function is based on image processing technology. By comparing the pixel differences between the images before and after plugging and unplugging, the friction distance can be accurately measured. This method not only avoids human measurement errors, but also provides micron-level measurement accuracy, which is of great significance for evaluating the structural stability and contact reliability of connectors.

[0042] like Figure 2 As shown, the calculation method of the friction distance includes dividing the test area 11 into a grid and setting the friction process direction of the connector 10 as the X-axis; comparing the difference point A and the difference point B in the test area 11 by pixel difference, marking the pixel coordinates of the difference point A and the difference point B as A(x1, y1) and B(x2, y2) respectively, and defining the absolute distance between the difference point A and the difference point B in the X-axis as the friction distance D x=|X2-X1|. The friction distance and contact point clamping force measurement module utilizes image difference analysis principles. Using a high-resolution industrial camera, the module captures images, analyzes them in an image processing system, and outputs the friction distance, friction area, and maximum color difference. Image difference analysis compares initial images taken before and after the connector is plugged in and out, with actual images. Through precise image capture and processing, it can quantitatively assess connector friction and contact point clamping force, providing intuitive quantitative indicators of connector structural stability and contact reliability, aiding connector quality control and fault diagnosis.

[0043] Furthermore, the image processing system uses pixel difference comparison to perform image difference analysis to confirm the absolute friction distance. This pixel difference comparison, based on image processing technology, compares the pixel values ​​in the images before and after insertion and removal to calculate the precise location and length of the friction mark. This micron-level measurement accuracy ensures accurate measurement of the friction distance, providing critical data for connector structural analysis.

[0044] It should be noted that, in this application, the calculation method of the friction area is similar to the calculation method of the friction distance, and will not be repeated here.

[0045] Furthermore, the contact point clamping force measurement function determines the location of maximum clamping force by analyzing the maximum color difference between all pixels within a fixed area of ​​the image. This contact point clamping force measurement principle is based on color difference analysis. By calculating the change in pixel values ​​at the same location before and after insertion and removal, the contact point clamping force can be inferred. This non-contact measurement method not only improves measurement accuracy but also avoids potential damage to connectors caused by traditional measurement methods, providing a new perspective for connector performance evaluation.

[0046] It should be noted that in this application, the image processing system includes a color difference analysis function that calculates the maximum color difference between all pixels within a fixed area of ​​the image. This color difference analysis function is based on color theory. By calculating the color changes in a specific area of ​​the image, the clamping force of the connector contact point can be reflected. This method is not only simple and easy to implement, but also provides quantitative analysis results, which is of great value for connector quality control and troubleshooting.

[0047] Furthermore, the method for calculating the maximum color difference value includes obtaining the RGB value of each pixel in the test area 11; then, the color difference value of the same pixel before and after the plug-in end is: , where (R1, G1, B1) is the RGB value of the pixel extracted by the first shot before the plug-in test, and (R2, G2, B2) is the RGB value of the same pixel extracted by the second shot after the plug-in test; then, the maximum color difference value output by the test area 11 is ΔE=MAX(ΔE1, ΔE2, ΔE3 ……, ΔEi ), where i represents pixel 1, pixel 2, pixel 3, and so on.

[0048] It should be noted that in this application, during the coloring pretreatment process of the plug-in end of the connector 10, the plug-in end is completely immersed in an erasable colorant and then naturally dried in a dust-free environment. This ensures the reliability of the coloring of the plug-in end, thereby ensuring the accuracy and reliability of subsequent testing.

[0049] It should be noted that, in the present application, determining whether the riveting stability of the connector 10 in each test area 11 meets the standard includes if the friction distance, friction area, and maximum color difference value in the same test area 11 are all greater than the corresponding standard thresholds, then the riveting stability of the test area 11 is determined to meet the standard; if the riveting stability of all test areas 11 selected for the same connector 10 meets the standard, then the riveting stability of the connector 10 is determined to meet the standard.

[0050] like Figure 1 As shown, the output friction distances are L1, L2, L3, ..., the corresponding output friction areas are S1, S2, S3, ..., the output maximum light differences are ΔE1, ΔE2, ΔE, ..., the standard thresholds are L, S, ΔE respectively, and the three selected areas are respectively as the two ends and the middle as mentioned above, and are distinguished by zone 1, zone 2, and zone 3 respectively.

[0051] It should be noted that, in this application, the above-mentioned plug-in end is a metal end.

[0052] The present application provides a test method for detecting the riveting stability of connectors in servers. Of course, the structural parts involved in the above test method are all structural parts included in the measurement system, mainly including a connector preprocessing module, a connector plug-in module, a friction distance and contact point clamping force measurement module, and a matching software system.

[0053] Furthermore, after the connector components are plugged in and out, friction marks will be left on the connector's metal springs. If the springs have a strong pressing force, the corresponding marks will be more obvious, and the color difference between the contact position and the other non-contact positions will be relatively large. Correspondingly, if the springs have a weak pressing force or even no contact, the scratch marks will be very small, and the color difference will be very small or even zero. Therefore, the present invention uses color difference analysis to determine whether the springs' previous pressing force has reached a threshold. As shown in Table 1 below, a specific comparison between color difference and pressing force is provided. The color difference can be used to determine whether the pressing force is sufficient.

[0054] Table 1: Table for judging the pressing force based on color difference

[0055]

[0056] Furthermore, the connector pretreatment module pre-colors and dries the male connector contacts. This module includes a fixture for fixing the sample to be tested and a container for storing liquid. When in use, the container is filled with enough erasable black paint to immerse the connector terminals. The sample (only the male connector contacts) is immersed in the liquid until the metal parts of the contacts are completely and evenly colored, with a thickness of no more than 0.1mm.

[0057] Furthermore, the friction distance and contact point clamping force measurement module can measure the plugging and unplugging marks, i.e. the friction distance, produced after the connector is plugged in and out based on the image differences. Its accuracy can reach the micron level and eliminates unnecessary errors caused by human operation. This module includes a connector fixing operating table, a light source, a high-resolution industrial camera, and the necessary image processing system.

[0058] Furthermore, the above connector fixing operating table includes a connector fixing fixture and a retractable operating rod for fixing the camera, and the retractable operating rod for fixing the camera can be rotated 360 degrees to adjust the position of the camera.

[0059] Next, the pre-treated male connector is fixed (paying attention to the exposed gold finger area), then photographed and transmitted to the image processing system. After performing a plug-in and unplug test with the server's original structure and female connector, the connector terminals are restored to their original fixed position and photographed. The image processing system analyzes the image differences and calculates the actual friction distance, area, and maximum color difference value for the selected area.

[0060] Furthermore, when taking the photos twice, the placement of the test sample, the brightness of the light source, the fixed position of the camera and the setting parameters must remain consistent.

[0061] Furthermore, image difference analysis is completed through pixel difference comparison, and the friction distance before and after the plug-in test is output.

[0062] ① Divide the specified analysis area into a grid and set the connector friction process direction to the X-axis to confirm the absolute friction distance.

[0063] ②Extract the features of the image through the image processing library (Python, such as OpenCV), perform feature matching, select the difference points A and B in the area (compare the difference points A and B between the selected areas, and mark the pixel coordinates of the difference points A(x1, y1) and B(x2, y2).

[0064] ③ We can obtain the Euclidean distance, block distance and chessboard distance between two points; define the absolute distance on the X axis as the friction distance; that is, D x =|X2-X1|.

[0065] Furthermore, the contact point pressing force measurement function calculates the maximum color difference between all pixels in a fixed area of ​​the image, and the position of the maximum color difference is located at the position of the maximum pressing force.

[0066] ① Get the RGB value of each pixel in the specified analysis area;

[0067] ②The color difference value of the same pixel before and after plugging in and out;

[0068] ,(R1,G1,B1) is the RGB value of pixel 1 extracted by the first photo, and (R2,G2,B2) is the RGB value of the same pixel 1 extracted by the photo after the plug-in test.

[0069] ③The maximum color difference in the output area ΔE=MAX(ΔE1,ΔE2,ΔE3……,ΔE i );

[0070] Furthermore, the above selected areas are selected manually, and at least three locations are selected, which are located at both ends and the middle part of the connector respectively.

[0071] Furthermore, the calculated friction distance, friction area and maximum color difference value are input into the connector riveting judgment system, and by comparing them with the previously set connector standard threshold, it can be determined whether the connector riveting stability meets the standard.

[0072] It should be noted that in this application, the RGB values ​​of the pixels mentioned above refer to the three components of each pixel in an RGB image: red (R), green (G), and blue (B). The value of each component is usually between 0 and 255, indicating the intensity of the color. For example, the RGB value of white is (255, 255, 255), and black is (0, 0, 0). In the RGB565 format, R, G, and B are stored as: R = color & 0xF800, G = color & 0x07E0, and B = color & 0x001F. In addition, image processing libraries such as OpenCV can be used to obtain the RGB value of a specific pixel in an image.

[0073] Through the above-mentioned implementation, the present application provides a comprehensive, accurate, and efficient method for testing the riveting stability of connectors in servers. It can not only detect various types of connectors, but also quantitatively evaluate the friction distance, friction area, and contact point pressing force of the connectors, providing strong support for the design, production, and maintenance of connectors. In specific applications, the tester first places the male contact of the connector in a colorant for pretreatment, then uses a sample fixing fixture to fix it to the operating table, adjusts the light source and the angle of the camera, and takes the first photo. Subsequently, the male contact is inserted into the female end of the connector for plugging and unplugging test. After taking the second photo, the image processing system analyzes the difference between the two images, outputs the friction distance, friction area, and maximum color difference value, and finally compares these data with the preset threshold to determine whether the riveting stability of the connector meets the standard. This series of testing processes not only simplifies the traditional manual measurement process, but also significantly improves the accuracy and efficiency of the test, playing an important role in improving the manufacturing quality and performance stability of server connectors. In fields such as high-performance computing, data centers, and AI artificial intelligence, the testing method and system of the present invention can help engineers promptly identify problems with connectors and take measures to improve them, thereby ensuring the normal operation of the server and the efficient and stable transmission of data.

[0074] The following is a specific example of detecting the riveting stability of connectors in a server:

[0075] 1) Pre-color the male contacts of the connector and let them dry in advance, ensuring that the coloring is uniform and the thickness does not exceed 0.1mm;

[0076] 2) Fix the sample on the operating table with a fixture, adjust the fixture angle, light source and camera angle to take a photo of the sample so that the contact parts can be clearly recorded; at the same time, record the fixture angle, camera angle, parameters, etc. for easy use when taking photos again;

[0077] 3) Leave the female connector installed on the original server structure. Insert the pre-treated male connector into the female structure. After plugging and unplugging, visually inspect for any signs of friction.

[0078] 4) Fix the male contact of the connector after testing using the original parameters and take photos of the sample;

[0079] 5) The two photos are transferred to the image processing system, and at least three areas to be measured are manually selected. After image difference processing, the friction distance, friction area, and the maximum color difference value within the area are output;

[0080] 6) Compare the friction distance, area, and maximum color difference values ​​obtained from the analysis with the connector standard threshold. If all three values ​​within the same area are greater than the threshold, the riveting stability of that area is considered to have met the standard. If all selected areas of the same connector meet the standard, the riveting stability of the connector is considered to have met the standard.

[0081] It should be noted that in this application, the test system for detecting the riveting stability of server connectors includes: a fixture for fixing the sample to be tested, which is used to stabilize the position of the connector male contact; a container for storing liquid, which is used to hold the coloring liquid and pre-process and color the connector male contact; a high-resolution industrial camera, which is used to capture images of the connector terminals, and the industrial camera has a built-in or external angle adjustment mechanism; a light source, which provides an adequate lighting environment for the industrial camera to shoot; and an image processing module, which is used to receive the image data output by the industrial camera and output the processing results. This modular design enables the test system to adapt to different types of server connectors, improving the flexibility and scope of application of the test. The fixture and adjustable industrial camera ensure the stability of the connector and the accuracy of image acquisition during the test. The introduction of the light source further optimizes the image quality and facilitates subsequent image processing and analysis. The intelligent analysis of the image processing module can quickly and accurately identify the friction marks and color changes of the connector, thereby realizing automatic detection of riveting stability, greatly improving test efficiency and accuracy.

[0082] In one exemplary embodiment, the system further includes a connector pre-processing module, which, in conjunction with a container capable of storing liquid, pre-colors the connector male contacts, with the coloring layer being no thicker than 0.1 mm. The pre-processing module's design takes into account the effects of the coloring liquid on the connector male contacts. By controlling the thickness of the coloring layer, it ensures contrast for subsequent image processing while also preventing the potential impact of an excessively thick coloring layer on the connector itself, thereby ensuring test reliability and connector integrity.

[0083] In one exemplary embodiment, the friction distance and contact point clamping force measurement module utilizes image difference analysis principles. Using a high-resolution industrial camera, images are captured and analyzed in an image processing module to output the friction distance, friction area, and maximum color difference. Image difference analysis is based on comparing images of the connector before and after insertion and removal. Through precise image capture and processing, it can quantitatively assess connector friction and contact point clamping force, providing intuitive quantitative indicators of connector structural stability and contact reliability, facilitating connector quality control and fault diagnosis.

[0084] In one exemplary embodiment, the image processing system uses pixel difference comparison to perform image difference analysis to determine the absolute friction distance. This pixel difference comparison, based on image processing technology, compares the pixel values ​​in the images before and after insertion and removal to calculate the precise location and length of the friction mark. This micron-level measurement accuracy ensures accurate measurement of the friction distance, providing critical data for connector structural analysis.

[0085] In one exemplary embodiment, the contact point clamping force measurement function determines the location of maximum clamping force by analyzing the maximum color difference between all pixels within a fixed area of ​​the image. This contact point clamping force measurement principle is based on color difference analysis. By calculating the change in pixel values ​​at the same location before and after insertion and removal, the contact point clamping force can be inferred. This non-contact measurement method not only improves measurement accuracy but also avoids potential damage to connectors caused by traditional measurement methods, providing a new perspective for connector performance evaluation.

[0086] In one exemplary embodiment, the image processing system manually selects test areas, selecting at least three locations: at each end and in the middle of the connector. This manual selection ensures representative measurements. By specifically measuring key connector locations, a comprehensive assessment of connector riveting stability can be performed. This method is applicable to connectors of various shapes and sizes, making it widely applicable.

[0087] In one exemplary embodiment, the image processing module maintains consistency in sample placement, light source brightness, camera positioning, and other parameters when processing image data. This consistency principle is implemented to eliminate the influence of external factors on test results. Standardized testing conditions ensure the comparability and repeatability of image processing results, which is crucial for establishing unified testing standards and evaluation systems.

[0088] In one exemplary embodiment, the female connector remains installed on the original server structure. This design simulates the connection state in a real working environment. By performing plug-in and pull-out tests within the server structure, the connector's riveting stability in actual use can be more accurately assessed, providing a practical reference for server maintenance and upgrades.

[0089] In one exemplary embodiment, the test sample operating table includes a retractable lever for adjusting the position of the industrial camera. The lever's design takes into account the sizes and shapes of various connectors. By flexibly adjusting the camera's position, it ensures optimal image capture angles and fields of view, improving image quality and measurement accuracy.

[0090] In one exemplary embodiment, the image processing module's color difference analysis function calculates the maximum color difference between all pixels within a fixed area of ​​the image. Based on color theory, color difference analysis can reveal the clamping force of connector contacts by calculating color variations in specific areas of the image. This method is not only simple and easy to implement, but also provides quantitative analysis results, making it valuable for connector quality control and troubleshooting.

[0091] In one exemplary embodiment, the image processing system's friction distance measurement function compares pixel differences, outputting the friction distance before and after the plugging and unplugging test. This friction distance measurement, based on image processing technology, accurately measures the friction distance by comparing pixel differences between pre- and post-plugging images. This method not only avoids human measurement errors but also provides micron-level measurement accuracy, which is crucial for assessing connector structural stability and contact reliability.

[0092] The above describes in detail a test method for detecting the riveting stability of connectors in servers, as provided by this application. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is intended only to facilitate understanding of the method and core concepts of this application. It should be noted that those skilled in the art may make various improvements and modifications to this application without departing from the principles of this application, and such improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A testing method for detecting the riveting stability of connectors in a server, characterized in that: include: Evenly color the plug-in and plug-out ends of the connector with a colorant and allow to dry so that the coloring layer is completely cured; Fixing the connector that has been colored and dried on a test operating table by a fixing fixture, adjusting a first parameter of the camera to a first preset parameter, and adjusting a second parameter of the light source to a second preset parameter, photographing the connector once and recording an initial image of the connector; Perform a plug-in / pull-out test on the connector that has been photographed once, by inserting the plug-in end into the mating end on the server and then pulling it out, and visually observing whether there are obvious friction marks on the surface of the plug-in end; Fixing the connector that has completed the plugging and unplugging operation on the test operating table again using the fixing fixture, photographing the connector a second time and recording an actual image of the connector; Importing the initial image and the actual image into an image processing system for difference comparison, manually selecting at least three test areas, and the image processing system calculating and outputting the friction distance, friction area, and maximum color difference value corresponding to each test area based on the difference between the initial image and the actual image; The friction distance, the friction area, and the maximum color difference value of each test area are compared one by one with a preset standard threshold value of connector riveting stability to determine whether the riveting stability of the connector in each test area meets the standard.

2. The testing method according to claim 1, wherein: The thickness of the colored layer does not exceed 0.1 mm.

3. The testing method according to claim 1, wherein: During the second photographing of the connector that has completed the plugging and unplugging operation, the placement position of the connector, the first parameter of the camera, and the second parameter of the light source are all consistent with those in the first photographing process.

4. The testing method according to claim 1, wherein: The first parameter includes at least a shooting angle of the camera and a position of the camera.

5. The testing method according to claim 1, wherein: The second parameter includes at least the brightness of the light source and the position of the light source.

6. The testing method according to claim 1, wherein: The manually selected test area at least includes two end positions where the plug-in end is located in the length direction of the connector and a middle position where the plug-in end is located in the length direction of the connector.

7. The testing method according to claim 1, wherein: The calculation method of the friction distance includes: Divide the test area into a grid and set the friction process direction of the connector to be the X-axis; Compare the difference points A and B in the test area by pixel difference, mark the pixel coordinates of the difference points A and B as A(x1, y1) and B(x2, y2) respectively, and define the absolute distance between the difference points A and B in the X-axis direction as the friction distance .

8. The testing method according to claim 1, wherein: The calculation method of the maximum color difference value includes: Obtain the RGB value of each pixel in the test area; Then, the color difference value of the same pixel point before and after the plugging and unplugging end is: , where (R1, G1, B1) is the RGB value of the pixel extracted by the first shot before the plug-in test, and (R2, G2, B2) is the RGB value of the same pixel extracted by the second shot after the plug-in test; Then, the maximum color difference value output by the test area is ΔE=MAX(ΔE1, ΔE2, ΔE3 ……, ΔE i ).

9. The testing method according to claim 1, wherein: During the coloring pretreatment of the plug-in end of the connector, the plug-in end is completely immersed in the erasable colorant, and the plug-in end is naturally dried in a dust-free environment.

10. The testing method according to claim 1, wherein: Determining whether the riveting stability of the connector in each test area meets the standard includes: If the friction distance, the friction area, and the maximum color difference value in the same test area are all greater than corresponding standard thresholds, it is determined that the riveting stability of the test area meets the standard; If the riveting stability of all the test areas selected for the same connector meets the standard, it is determined that the riveting stability of the connector meets the standard.

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