System and method for testing impact resistance of alumina ball

Abstract

The embodiment of the invention discloses an aluminum oxide ball impact resistance testing system and method, and relates to the technical field of material performance testing. The method comprises the following steps: acquiring a response image sequence of an alumina ball sample in an impact process and pressure data generated by contact between the alumina ball sample and an impact target surface in the impact process; performing feature extraction and deformation analysis on a target image frame in the response image sequence to obtain first test response data; under the condition that the first test response data indicates that the alumina ball sample is elastically deformed, estimating the energy absorption amount of the alumina ball sample in the impact process according to the pressure data to obtain second test response data; and adjusting the impact force based on the second test response data, carrying out testing again by using the adjusted impact force, and ending the testing until the first test response data corresponding to the adjusted impact force indicates that the alumina ball sample has plastic deformation, so as to obtain an impact force resistance test result corresponding to the alumina ball sample.

Description

Technical Field

[0001] The present application relates to the technical field of material performance testing, and in particular to a system and method for testing the impact resistance of an aluminum oxide ball. Background Art

[0002] Alumina ceramic balls (abbreviated as alumina balls) are a high-performance inorganic non-metallic material. Their exceptional properties, including high hardness, wear resistance, corrosion resistance, and thermal stability, have led to their widespread application across a wide range of industrial sectors. For example, in the abrasives and grinding tool industry, alumina balls serve as abrasive media, effectively improving grinding efficiency and quality. In the chemical industry, alumina balls are also commonly used as catalyst carriers or fillers, demonstrating their unique chemical stability and catalytic activity. With technological advancements and industrial development, the application range of alumina balls continues to expand. Currently, alumina balls are also widely used in high-tech fields such as electronics and aerospace.

[0003] Because different applications require different impact resistance performance from alumina balls, impact resistance testing is required during the R&D and production process to ensure quality and performance. However, traditional testing methods often rely on manual operation, which is not only inefficient but also susceptible to subjective factors, leading to inaccurate test results.

[0004] Based on this, it is necessary to study a more scientific alumina ball impact resistance testing system and method to improve the test efficiency and the accuracy of the test results. Summary of the Invention

[0005] To solve the above problems, one aspect of the embodiments of this specification provides a method for testing the impact resistance of an alumina ball, the method comprising: Acquiring a response image sequence of the aluminum oxide ball sample during an impact process in which a test impact force is applied, and pressure data generated by the aluminum oxide ball sample in contact with an impact target surface during the impact process, wherein the response image sequence is obtained by arranging, in a time sequence, multiple frames of dynamic response images captured by a high-speed camera of the aluminum oxide ball sample during the impact process, and the pressure data is collected by a pressure sensor array arranged on the impact target surface; Performing feature extraction and deformation analysis on a target image frame in the response image sequence to obtain first test response data, wherein the first test response data is used to indicate whether the aluminum oxide ball specimen undergoes elastic deformation or plastic deformation, and the target image frame is an image between a first moment when the impact force is applied and a second moment when the aluminum oxide ball specimen first contacts the impact target surface; When the first test response data indicates that the aluminum oxide ball sample is elastically deformed, the energy absorbed by the aluminum oxide ball sample during the impact process is estimated according to the pressure data and the test impact force to obtain second test response data; Based on the second test response data, the impact force applied to the alumina ball sample is adjusted, and the adjusted impact force is used for retesting until the first test response data corresponding to the adjusted impact force indicates that the alumina ball sample is plastically deformed, and the test is ended to obtain the impact resistance test result corresponding to the alumina ball sample.

[0006] In some embodiments, performing feature extraction and deformation analysis on the target image frame in the response image sequence to obtain first test response data includes: Performing edge detection on the aluminum oxide ball sample in the target image frame to identify contour information of the aluminum oxide ball sample; The deformation data of the aluminum oxide ball sample in the target image frame is analyzed according to the contour information of the aluminum oxide ball sample, and the first test response data is obtained based on the deformation data.

[0007] In some embodiments, analyzing the deformation data of the aluminum oxide ball sample in the target image frame according to the contour information of the aluminum oxide ball sample, and obtaining the first test response data based on the deformation data, includes: Determine the area and perimeter of the aluminum oxide ball sample in each target image frame according to the contour information; Calculating the deformation rate of the alumina ball sample during the impact process according to the area and the perimeter; The deformation rate is used as deformation data corresponding to each target image frame, and the first test response data is obtained based on a deformation data sequence composed of deformation data corresponding to all target image frames.

[0008] In some embodiments, the deformation rate is calculated based on the following formula: Wherein, R represents the deformation rate of the aluminum oxide ball sample, A represents the area of ​​the aluminum oxide ball sample in the target image frame, and C represents the circumference of the aluminum oxide ball sample in the target image frame. Indicates circularity.

[0009] In some embodiments, obtaining the first test response data based on a deformation data sequence formed by deformation data corresponding to all the target image frames includes: When the deformation data in the deformation data sequence meets a preset rule, the aluminum oxide ball specimen is determined to be elastically deformed; otherwise, the aluminum oxide ball specimen is determined to be plastically deformed; wherein, the preset rule at least includes that the deformation data in the deformation data sequence shows a monotonically decreasing trend in the stage when the aluminum oxide ball specimen is not subjected to external force, and the minimum value of the deformation data tends to zero.

[0010] In some embodiments, estimating the energy absorbed by the alumina ball sample during the impact process based on the pressure data and the test impact force to obtain second test response data includes: Determine the maximum pressure value of the alumina ball sample when it contacts the impact target surface during the impact process according to the pressure data; The energy absorption amount of the aluminum oxide ball sample during the impact process is estimated according to the maximum pressure value and the test impact force, and the energy absorption amount is used as the second test response data.

[0011] In some embodiments, adjusting the impact force applied to the aluminum oxide ball specimen based on the second test response data includes: The impact force adjustment amplitude is determined based on the comparison result between the energy absorption amount and the preset energy absorption index; wherein, when the energy absorption amount is greater than the preset energy absorption index, the impact force is increased according to a first proportional coefficient; when the energy absorption amount is less than or equal to the preset energy absorption index, the impact force is increased according to a second proportional coefficient, and the first proportional coefficient is greater than the second proportional coefficient.

[0012] In some embodiments, the test is performed again using the adjusted impact force until the first test response data corresponding to the adjusted impact force indicates that the aluminum oxide ball specimen is plastically deformed, and the test is terminated to obtain the impact resistance test result corresponding to the aluminum oxide ball specimen, including: Obtain the test round number corresponding to the last test and the target impact force corresponding to the second-to-last test; The target impact force is fatigue corrected according to the number of test rounds to obtain a corrected impact force value, and an impact resistance test result corresponding to the alumina ball sample is obtained based on the corrected impact force value.

[0013] In some embodiments, performing fatigue correction on the target impact force according to the number of test rounds includes: Calculating according to the number of test rounds and a preset fatigue correction function to obtain a correction value for the target impact force; compensating the target impact force based on the correction value to obtain a corrected impact force value; The correction value is obtained by multiplying the target impact force by a correction coefficient calculated based on the fatigue correction function. The fatigue correction function is expressed as follows: represents the initial fatigue attenuation coefficient, represents the exponential decay coefficient, Indicates the number of test rounds, represents the linear fatigue accumulation factor, Indicates the fatigue accumulation starting round threshold, represents the normalization operation, Indicates the correction coefficient corresponding to the number of test rounds N.

[0014] Another aspect of the embodiments of this specification further provides an alumina ball impact resistance testing system, the system comprising: An impact device, used to apply a controllable test impact force to the alumina ball sample, the impact device comprising a height-adjustable bearing mechanism and an impact force generating mechanism, and an impact target surface of the impact device is provided with a pressure sensor array; An image acquisition unit, comprising at least one high-speed camera, wherein the high-speed camera is configured to acquire dynamic response images of the alumina ball sample during the impact process at a preset frame rate to obtain a response image sequence; a first data processing unit, configured to perform feature extraction and deformation analysis on a target image frame in the response image sequence to obtain first test response data, wherein the first test response data is used to indicate whether the aluminum oxide ball specimen undergoes elastic deformation or plastic deformation, and the target image frame is an image between a first moment when the impact force is applied and a second moment when the aluminum oxide ball specimen first contacts the impact target surface; a second data processing unit configured to estimate, when the first test response data indicates that the aluminum oxide ball specimen is elastically deformed, an energy absorption amount of the aluminum oxide ball specimen during the impact process based on the pressure data and the test impact force, to obtain second test response data; An impact control unit is used to adjust the impact force applied to the alumina ball specimen based on the second test response data, and to perform retesting using the adjusted impact force until the first test response data corresponding to the adjusted impact force indicates that the alumina ball specimen is plastically deformed, thereby terminating the test and obtaining the impact resistance test result corresponding to the alumina ball specimen.

[0015] The beneficial effects of the alumina ball impact resistance testing system and method provided in the embodiments of this specification may include at least: (1) The deformation of the alumina ball specimen is determined by image analysis, and then the impact force applied to the alumina ball specimen is adjusted according to the deformation of the alumina ball specimen. This can realize the automated test of the impact resistance of the alumina ball, thereby improving the test efficiency and reducing the labor cost required for the test process; (2) The impact resistance of the alumina ball specimen is reflected by calculating the energy absorbed by the alumina ball specimen during the impact process, and the impact force applied to the alumina ball specimen is adjusted based on the energy absorbed during the test. The test impact force can be adaptively adjusted according to the impact resistance of the alumina ball specimen, thereby ensuring the accuracy of the test results to a certain extent while taking into account the test efficiency; (3) By performing fatigue correction on the target impact force corresponding to the penultimate test according to the number of test rounds, and obtaining the impact resistance test result corresponding to the alumina ball specimen based on the corrected impact force value, the fatigue cumulative effect generated by the alumina ball specimen during multiple tests can be taken into account, thereby more accurately evaluating the impact resistance of the alumina ball and further improving the accuracy and reliability of the test results.

[0016] Additional features are described in part in the following description. They will become apparent to those skilled in the art by reviewing the following and accompanying drawings, or by following the production or operation of the examples. The features of this specification may be realized and obtained by practicing or using the various aspects of the methods, tools, and combinations described in the following detailed examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] This specification will be further described in the form of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting, and in these embodiments, the same numbers represent the same structures, wherein: Figure 1 is an exemplary module diagram of an aluminum oxide ball impact resistance testing system according to some embodiments of this specification; Figure 2 is an exemplary flow chart of a method for testing the impact resistance of an aluminum oxide ball according to some embodiments of this specification. DETAILED DESCRIPTION

[0018] To more clearly illustrate the technical solutions of the embodiments of this specification, the following briefly describes the drawings required for describing the embodiments. Obviously, the drawings described below are merely examples or embodiments of this specification. Those skilled in the art can apply this specification to other similar scenarios based on these drawings without inventive effort. Unless otherwise apparent from the context or otherwise noted, the same reference numerals in the figures represent the same structure or operation.

[0019] It should be understood that the terms "system," "device," "unit," and / or "module" used in this specification are a method for distinguishing different components, elements, parts, portions, or assemblies at different levels. However, if other terms can achieve the same purpose, the terms may be replaced by other expressions.

[0020] As used in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not refer to the singular but also include the plural. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements.

[0021] Flowcharts are used throughout this specification to illustrate the operations performed by systems according to embodiments of this specification. It should be understood that preceding or following operations do not necessarily need to be performed in exact order. Instead, the steps may be processed in reverse order or simultaneously. Furthermore, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0022] The impact resistance testing system and method of an aluminum oxide ball provided in the embodiments of this specification are described in detail below with reference to the accompanying drawings.

[0023] Figure 1 Schematic diagram of an exemplary module of an aluminum oxide ball impact resistance testing system according to some embodiments of this specification.

[0024] Reference Figure 1 The aluminum oxide ball impact resistance testing system 100 provided in the embodiment of the present application may include an impact device 110, an image acquisition unit 120, a first data processing unit 130, a second data processing unit 140 and an impact control unit 150. Among them: The impact device 110 can be used to apply a controllable test impact force to the alumina ball sample. The impact device 110 can include a height-adjustable supporting mechanism (for placing the alumina ball sample) and an impact force generating mechanism (for generating the required impact force). The impact target surface of the impact device (i.e., the part that the alumina ball sample contacts after being moved by the impact force) is arranged with a pressure sensor array.

[0025] Image acquisition unit 120 may include at least one high-speed camera configured to capture dynamic response images of the aluminum oxide ball specimen during the impact process at a preset frame rate (e.g., 100 frames per second) to generate a response image sequence. In embodiments of the present application, when multiple high-speed cameras are present, a response image sequence may be generated based on the dynamic response images captured by each high-speed camera. Furthermore, in some embodiments of the present application, the multiple high-speed cameras may be arranged at different viewing angles to capture the dynamic response of the aluminum oxide ball specimen during the impact process from multiple angles.

[0026] The first data processing unit 130 can be configured to perform feature extraction and deformation analysis on the target image frame in the response image sequence to obtain first test response data. The first test response data indicates whether the aluminum oxide ball specimen undergoes elastic or plastic deformation, and the target image frame is an image between the first moment the impact force is applied and the second moment the aluminum oxide ball specimen first contacts the impact target surface (the first contact during a single test).

[0027] The second data processing unit 140 can be used to estimate the energy absorption of the aluminum oxide ball sample during the impact process according to the pressure data and the test impact force when the first test response data indicates that the aluminum oxide ball sample is elastically deformed, so as to obtain second test response data.

[0028] The impact control unit 150 can be used to adjust the impact force applied to the aluminum oxide ball specimen based on the second test response data, and use the adjusted impact force to perform retesting until the first test response data corresponding to the adjusted impact force indicates that the aluminum oxide ball specimen is plastically deformed (that is, the aluminum oxide ball specimen is damaged), and the test is terminated to obtain the impact resistance test result corresponding to the aluminum oxide ball specimen.

[0029] For more details about the above-mentioned units and / or devices, please refer to other places in this specification (for example Figure 2 part and its related descriptions), which will not be repeated here.

[0030] It should be understood that Figure 1The various units and / or devices in the illustrated alumina ball impact resistance testing system 100 can be implemented in various ways. For example, in some embodiments, the various units and / or devices in the system can be implemented using hardware, software, or a combination of hardware and software. The hardware component can include mechanical devices (such as an impact force generating mechanism), electronic devices (such as a high-speed camera), and / or circuit components (such as a pressure sensor, controller, etc.), which can operate according to preset programs or instructions. The software component can include program code, which can be stored in a computer-readable medium and, when executed by a processor, implements the functions of the various units and / or devices. Furthermore, the system can include one or more interfaces for communication and data transmission with other systems or devices. These interfaces can be wired interfaces, such as USB and Ethernet, or wireless interfaces, such as Wi-Fi and Bluetooth. By utilizing these interfaces, the system can exchange data and collaborate with other systems or devices, thereby achieving more complex testing tasks and functions.

[0031] It should be noted that the above description of the aluminum oxide ball impact resistance testing system 100 is provided for illustrative purposes only and is not intended to limit the scope of this specification. It will be appreciated that those skilled in the art can, based on the description of this specification, arbitrarily combine the various units in the system, or construct subsystems that connect to other modules or units without departing from the principles herein. Such variations are within the scope of this specification.

[0032] Figure 2 is an exemplary flow chart of a method for testing the impact resistance of an aluminum oxide ball according to some embodiments of this specification. In some embodiments, the method for testing the impact resistance of an aluminum oxide ball can be performed by processing logic, which can include hardware (e.g., circuits, dedicated logic, programmable logic, microcode, etc.), software (instructions running on a processing device to perform hardware simulation), etc., or any combination thereof. In some embodiments, Figure 2 One or more operations in the flowchart of the aluminum oxide ball impact resistance test method can be implemented by a processing device. For example, the aluminum oxide ball impact resistance test method can be stored in a storage device in the form of instructions and called and / or executed by a processing device.

[0033] Reference Figure 2 The impact resistance testing method of an aluminum oxide ball provided in the embodiment of the present application may include the following steps S210 to S240: Step S210 , obtaining a response image sequence of the aluminum oxide ball sample during the impact process of applying a test impact force, and pressure data generated by the aluminum oxide ball sample contacting the impact target surface during the impact process.

[0034] In an embodiment of the present application, the response image sequence can be obtained by arranging multiple frames of dynamic response images collected by a high-speed camera for the alumina ball sample during the impact process in a chronological order, and the pressure data can be obtained by collecting a pressure sensor array arranged on the impact target surface.

[0035] It should be noted that in the embodiments of the present application, the high-speed camera can capture the dynamic changes of the alumina ball specimen under the test impact force at a high frame rate (e.g., 100 frames per second), ensuring that the dynamic response images in the response image sequence can record in detail key information such as the specimen's deformation, crack propagation, and damage during the impact process. At the same time, the pressure sensor array can be tightly attached to the impact target surface to accurately measure the pressure distribution and magnitude generated when the specimen contacts the impact target surface, thereby measuring the energy absorption of the alumina ball specimen during the impact process based on the detected pressure data.

[0036] Step S220 , performing feature extraction and deformation analysis on the target image frame in the response image sequence to obtain first test response data.

[0037] In embodiments of the present application, feature extraction and deformation analysis can be performed on a target image frame in the response image sequence using image recognition technology to obtain first test response data indicating whether the aluminum oxide ball specimen is elastically or plastically deformed. In some embodiments of the present application, the target image frame may refer to an image between the first moment the impact force is applied and the second moment the aluminum oxide ball specimen first contacts the impact target surface (the first contact in a single test).

[0038] Specifically, in embodiments of the present application, edge detection can be performed on the aluminum oxide ball sample in the target image frame to identify the contour information of the aluminum oxide ball sample. Then, deformation data of the aluminum oxide ball sample in the target image frame is analyzed based on the contour information of the aluminum oxide ball sample, and the first test response data is obtained based on the deformation data. In some embodiments of the present application, to facilitate identification of the aluminum oxide ball sample from the target image frame, the aluminum oxide ball sample can be given a different color than the background.

[0039] For example, in some embodiments of the present application, a Canny edge detection algorithm can be used to perform edge detection on the aluminum oxide ball sample in the target image frame to obtain its edge contour. Furthermore, a contour tracking algorithm can be used to identify the complete contour information of the aluminum oxide ball sample.

[0040] In some embodiments of the present application, considering that when the alumina ball sample is damaged, its edge contour may appear discontinuous or irregular, in this case, these edge contours can be smoothed or interpolated to restore or reconstruct the contour information of the damaged edge, thereby improving the accuracy of edge detection.

[0041] Furthermore, in some embodiments of the present application, the area and perimeter of the aluminum oxide ball sample in each of the target image frames can be determined based on the contour information (such as the coordinate information of each edge pixel point) (the area and perimeter can be measured in pixels); then, the deformation rate of the aluminum oxide ball sample during the impact process is calculated based on the area and the perimeter; finally, the deformation rate is used as the deformation data corresponding to each of the target image frames, and the first test response data is obtained based on the deformation data sequence composed of the deformation data corresponding to all the target image frames.

[0042] In some embodiments of the present application, the deformation rate of the alumina ball sample during the impact process can be calculated based on the following formula: Wherein, R represents the deformation rate of the aluminum oxide ball sample, A represents the area of ​​the aluminum oxide ball sample in the target image frame, and C represents the circumference of the aluminum oxide ball sample in the target image frame. Represents circularity. This circularity is calculated based on the area A and perimeter C of the aluminum oxide ball sample identified in the target image frame. It can be used to measure the degree to which the aluminum oxide ball sample is circular. When the aluminum oxide ball sample is deformed by impact, its area A and perimeter C change, and the corresponding circularity also changes accordingly.

[0043] In an embodiment of the present application, the deformation rate calculated based on the above formula can be used as the deformation data corresponding to each of the target image frames, and a deformation data sequence can be constructed based on the deformation data corresponding to all the target image frames. Then, based on the change characteristics of the deformation data in the deformation data sequence, it can be judged whether the alumina ball sample is elastically deformed or plastically deformed (for example, broken).

[0044] Specifically, in some embodiments of the present application, the aluminum oxide ball specimen may be determined to be elastically deformed when the deformation data in the deformation data sequence satisfies a preset rule, and otherwise determined to be plastically deformed. The preset rule may include at least the following: the deformation data in the deformation data sequence exhibits a monotonically decreasing trend when the aluminum oxide ball specimen is not subjected to an external force, and the minimum value of the deformation data approaches zero (e.g., less than 2%).

[0045] For example, assuming that in some embodiments, the deformation data sequence is [10%, 15%, ..., 30%, 28%, 25%, ..., 0.2%], it can be seen that in the deformation data sequence, starting from a certain target image frame, the subsequent deformation data are all smaller than the previous deformation data, that is, they show a monotonically decreasing trend, and the final deformation data is close to 0. In this case, it can be determined that during the impact test, the aluminum oxide ball specimen has undergone elastic deformation and can be restored to its original shape. On the contrary, if the deformation data sequence does not meet the above-mentioned monotonically decreasing trend (for example, it stabilizes near a non-zero value), or the final deformation data is much greater than 0 (for example, Rn ≥ 2%, Rn represents the last deformation data in the deformation data sequence), it can be determined that the aluminum oxide ball specimen has undergone plastic deformation, such as breakage, and cannot be completely restored to its original shape, which means that the aluminum oxide ball cannot withstand the aforementioned test impact force.

[0046] Step S230: When the first test response data indicates that the aluminum oxide ball sample is elastically deformed, the energy absorbed by the aluminum oxide ball sample during the impact process is estimated according to the pressure data and the test impact force to obtain second test response data.

[0047] During the test, the impact resistance of the aluminum oxide ball specimen is usually tested with impact forces increasing from small to large. Therefore, the impact force is relatively small in the early stage, and the aluminum oxide ball specimen mainly undergoes elastic deformation. As the impact force gradually increases and reaches the impact resistance limit of the aluminum oxide ball specimen, plastic deformation may begin to occur.

[0048] In the embodiments of the present application, it is considered that the amount of energy absorbed by the alumina ball sample during the impact process can reflect its impact resistance to a certain extent. Specifically, if the amount of energy absorbed by the alumina ball sample during the impact process is greater, it indicates that the alumina ball sample can absorb more energy without being damaged when impacted, thereby having better impact resistance. At this time, the test impact force can be adjusted with a relatively large step length, thereby shortening the entire test process and improving test efficiency. On the contrary, if the amount of energy absorbed by the alumina ball sample during the impact process is small, it indicates that the alumina ball sample may be damaged when subjected to a smaller impact force, and its impact resistance is poor. At this time, the test impact force should be adjusted with a relatively small step length, so as to more accurately determine the impact resistance limit of the alumina ball sample, and provide a more accurate reference basis for subsequent alumina ball quality assessment or material improvement.

[0049] Based on this, in some embodiments of the present application, in order to achieve adaptive intelligent adjustment of the impact force during the test process, when the first test response data indicates that the aluminum oxide ball specimen is elastically deformed, the energy absorption of the aluminum oxide ball specimen during the impact process can be estimated based on the pressure data collected by the pressure sensor array arranged on the impact target surface and the test impact force applied in the current stage to obtain the second test response data, and then the second test response data can be used as the basis for subsequent control.

[0050] Specifically, in some embodiments of the present application, the maximum pressure value of the aluminum oxide ball sample when it contacts the impact target surface during the impact process can be determined based on the pressure data, and then the energy absorption amount of the aluminum oxide ball sample during the impact process can be estimated based on the difference between the maximum pressure value and the test impact force, and the energy absorption amount can be used as the second test response data.

[0051] Step S240: Adjust the impact force applied to the alumina ball specimen based on the second test response data, and perform retesting using the adjusted impact force until the first test response data corresponding to the adjusted impact force indicates that the alumina ball specimen is plastically deformed, thereby ending the test and obtaining the impact resistance test result corresponding to the alumina ball specimen.

[0052] In an embodiment of the present application, after obtaining the second test response data through the above steps, the impact force applied to the alumina ball sample can be adjusted based on the second test response data, and the adjusted impact force can be used for retesting.

[0053] Specifically, in some embodiments of the present application, the impact force adjustment range can be determined based on a comparison result between the energy absorption amount reflected in the second test response data and a preset energy absorption index. When the energy absorption amount is greater than the preset energy absorption index, the impact force is increased according to a first proportional coefficient; when the energy absorption amount is less than or equal to the preset energy absorption index, the impact force is increased according to a second proportional coefficient. The first proportional coefficient is greater than the second proportional coefficient. By way of example only, in some embodiments of the present application, the first proportional coefficient may be 5%, and the second proportional coefficient may be 2%.

[0054] In the embodiments of the present application, the preset energy absorption index can be set according to actual needs and is not specifically limited in this specification. By way of example only, in some embodiments, the preset energy absorption index can be set to the energy value that the alumina ball sample should absorb under a specific degree of deformation.

[0055] It should be noted that the above-mentioned numerical values ​​for the first and second proportional coefficients are for illustrative purposes only. In other embodiments, the first and second proportional coefficients may be set to other values. For example, in some embodiments, the first proportional coefficient may be 10% and the second proportional coefficient may be 5%. In some embodiments, the first and second proportional coefficients may also be adjusted based on the number of test rounds. For example, when the number of test rounds is small (e.g., the first three test cycles), the first and second proportional coefficients may be set to larger values. When the number of test rounds is large (e.g., the first three test cycles), the first and second proportional coefficients may be set to relatively smaller values.

[0056] It should also be noted that, in the embodiment of the present application, the impact resistance of the alumina ball sample is reflected by calculating the energy absorption of the alumina ball sample during the impact process, and the impact force applied to the alumina ball sample is adjusted based on the energy absorption during the test. The test impact force can be adaptively adjusted according to the impact resistance of the alumina ball sample, thereby taking into account the test efficiency while ensuring the accuracy of the test results to a certain extent.

[0057] It is understood that after each adjustment of the impact force, it is necessary to recollect the first test response data and determine whether the aluminum oxide ball specimen has undergone plastic deformation. If no plastic deformation has occurred, the impact force needs to be adjusted again. Once the first test response data indicates that the aluminum oxide ball specimen has undergone plastic deformation, the impact force applied during the previous test cycle (i.e., the penultimate test) can be used as the impact resistance test result for the aluminum oxide ball specimen. This impact resistance test result can be understood as the maximum impact force that the aluminum oxide ball specimen can withstand without breaking.

[0058] In some embodiments of the present application, it is taken into account that the aluminum oxide ball sample may accumulate fatigue as the number of test rounds increases during the test process, thereby affecting the accuracy of the test results. If the target impact force corresponding to the second-to-last test is directly used as the maximum impact force that the aluminum oxide ball sample can withstand, the test value may be too small. Based on this, in some embodiments of the present application, the number of test rounds corresponding to the last test and the target impact force corresponding to the second-to-last test can be obtained; then, the target impact force is fatigue-corrected according to the number of test rounds to obtain the corrected impact force value, and the impact resistance test result corresponding to the aluminum oxide ball sample is obtained based on the corrected impact force value.

[0059] Specifically, in some embodiments of the present application, a calculation can be performed based on the number of test rounds and a pre-set fatigue correction function to obtain a correction value for the target impact force; then, the target impact force is compensated based on the correction value to obtain a corrected impact force value; wherein, the correction value can be obtained by multiplying the target impact force by a correction coefficient calculated based on the fatigue correction function, and the fatigue correction function can be expressed as follows: in, Indicates the initial fatigue attenuation coefficient (which can be obtained based on the fatigue characteristics of the alumina ball material). represents the exponential decay coefficient (which can be determined by fitting pre-experimental data), Indicates the number of test rounds, represents the linear fatigue accumulation factor (used to characterize the permanent fatigue effect after multiple impacts, which can be obtained through statistical analysis of experimental data), Indicates the fatigue accumulation starting round threshold (can be set according to the maximum impact resistance round of the alumina ball without plastic deformation). represents the normalization operation, Indicates the correction coefficient corresponding to the number of test rounds N.

[0060] It is understood that in the present embodiment, when the number of test cycles N ≤ N0, exponential decay compensation is primarily used to avoid overcorrection when the number of test cycles is low. When the number of test cycles N > N0, a linear fatigue accumulation term can be superimposed to adaptively compensate for the degree of weakening of the alumina ball's fatigue resistance based on the number of test cycles, thereby ensuring that the corrected impact force value is more consistent with the critical damage threshold under actual fatigue conditions.

[0061] In some embodiments, the correction value for the target impact force may be expressed as follows: in, represents the correction value of the impact force on the target, Indicates the target impact force corresponding to the second-to-last test. represents the correction coefficient calculated based on the above fatigue correction function.

[0062] Furthermore, the corrected impact force value can be expressed as: ,in, Indicates the impact force value after correction.

[0063] It can be understood that in the embodiment of the present application, by performing fatigue correction on the target impact force corresponding to the penultimate test according to the number of test rounds, and obtaining the impact resistance test result corresponding to the alumina ball sample based on the corrected impact force value, the fatigue cumulative effect generated by the alumina ball sample during multiple tests can be taken into consideration, thereby more accurately evaluating the impact resistance performance of the alumina ball and further improving the accuracy and reliability of the test results.

[0064] In summary, the beneficial effects that may be brought about by the embodiments of this specification include but are not limited to: (1) In the aluminum oxide ball impact resistance testing system and method provided in some embodiments of this specification, the deformation of the aluminum oxide ball sample is determined by image analysis, and then the impact force applied to the aluminum oxide ball sample is adjusted according to the deformation of the aluminum oxide ball sample, which can realize the automated testing of the aluminum oxide ball impact resistance, thereby improving the test efficiency and reducing the manpower cost required for the test process; (2) In the aluminum oxide ball impact resistance testing system and method provided in some embodiments of this specification, the impact resistance of the aluminum oxide ball sample is reflected by calculating the energy absorption of the aluminum oxide ball sample during the impact process, and the impact force applied to the aluminum oxide ball sample is adjusted based on the energy absorption during the test. The impact force applied to the alumina ball sample can be adaptively adjusted according to the impact resistance of the alumina ball sample, thereby ensuring the accuracy of the test results to a certain extent while taking into account the test efficiency; (3) In the alumina ball impact resistance test system and method provided in some embodiments of this specification, by fatigue correction of the target impact force corresponding to the penultimate test according to the number of test rounds, and obtaining the impact resistance test result corresponding to the alumina ball sample based on the corrected impact force value, the fatigue cumulative effect generated by the alumina ball sample during multiple tests can be taken into account, thereby more accurately evaluating the impact resistance of the alumina ball and further improving the accuracy and reliability of the test results.

[0065] It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects that may be produced may be any one or a combination of the above, or any other possible beneficial effects.

[0066] While the basic concepts have been described above, it will be apparent to those skilled in the art that the detailed disclosure is merely illustrative and does not limit this specification. Although not explicitly stated herein, various modifications, improvements, and revisions to this specification may be made by those skilled in the art. Such modifications, improvements, and revisions are suggested in this specification and remain within the spirit and scope of the exemplary embodiments of this specification.

[0067] This specification also uses specific terms to describe the embodiments of this specification. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "one embodiment," "an embodiment," or "an alternative embodiment" two or more times in different locations in this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of this specification may be appropriately combined.

[0068] Furthermore, those skilled in the art will appreciate that various aspects of this specification may be illustrated and described in terms of any number of patentable categories or situations, including any new and useful process, machine, product, or combination of substances, or any new and useful improvement thereof. Accordingly, various aspects of this specification may be implemented entirely in hardware, entirely in software (including firmware, resident software, microcode, etc.), or a combination of hardware and software. Each of these hardware and software components may be referred to as a "data block," "module," "engine," "unit," "component," or "system." Furthermore, various aspects of this specification may be embodied as a computer product embodied in one or more computer-readable media, including computer-readable program code.

[0069] A computer storage medium may include a propagated data signal embodying the computer program code, for example, in baseband or as part of a carrier wave. The propagated signal may be in a variety of forms, including electromagnetic, optical, or any suitable combination thereof. A computer storage medium may be any computer-readable medium other than a computer-readable storage medium that can be connected to an instruction execution system, apparatus, or device to communicate, propagate, or transfer the program for use. The program code on the computer storage medium may be transmitted via any suitable medium, including radio, cable, fiber optic cable, RF, or similar media, or any combination of these.

[0070] The computer program code required for the operation of various portions of this specification may be written in any one or more programming languages, including object-oriented programming languages ​​such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C++, C#, VB.NET, Python, and the like; conventional procedural programming languages ​​such as C, Visual Basic, Fortran 2003, Perl, COBOL 2002, PHP, ABAP; dynamic programming languages ​​such as Python, Ruby, and Groovy; or other programming languages. The program code may be executed entirely on the user's computer, or as a standalone software package on the user's computer, or partially on the user's computer and partially on a remote computer, or entirely on a remote computer or processing device. In the latter case, the remote computer may be connected to the user's computer via any network, such as a local area network (LAN) or wide area network (WAN), or connected to an external computer (e.g., via the Internet), or in a cloud computing environment, or as a service such as software as a service (SaaS).

[0071] In addition, unless expressly stated in the claims, the order of the processing elements and sequences, the use of alphanumeric characters, or the use of other names described in this specification are not intended to limit the order of the processes and methods of this specification. Although the above disclosure discusses some embodiments of the invention that are currently considered useful through various examples, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that are consistent with the spirit and scope of the embodiments of this specification. For example, although the system components described above can be implemented by hardware devices, they can also be implemented only by software solutions, such as installing the described system on an existing processing device or mobile device.

[0072] Similarly, it should be noted that, in order to simplify the presentation of this specification and thus facilitate understanding of one or more embodiments of the invention, the foregoing descriptions of the embodiments of this specification sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not imply that the subject matter of this specification requires more features than those recited in the claims. In fact, an embodiment may have fewer features than all of the features of a single disclosed embodiment.

[0073] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise stated, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the description and claims are approximate values, which may vary according to the required features of the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of this specification are approximate values, in specific embodiments, the settings of such numerical values ​​are as accurate as possible within the feasible range.

[0074] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, and documents, cited in this specification is hereby incorporated by reference in its entirety. This excludes any application history documents that are inconsistent with or conflicting with the content of this specification, as well as any documents (currently or subsequently appended to this specification) that limit the broadest scope of the claims of this specification. It should be noted that if the descriptions, definitions, and / or terminology used in the accompanying materials are inconsistent or conflicting with the content of this specification, the descriptions, definitions, and / or terminology used in this specification shall prevail.

[0075] Finally, it should be understood that the embodiments described in this specification are intended only to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, by way of example and not limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly described and illustrated in this specification.

Claims

1. A method for testing the impact resistance of an alumina ball, characterized in that: include: Acquiring a response image sequence of the aluminum oxide ball sample during an impact process in which a test impact force is applied, and pressure data generated by the aluminum oxide ball sample in contact with an impact target surface during the impact process, wherein the response image sequence is obtained by arranging, in a time sequence, multiple frames of dynamic response images captured by a high-speed camera of the aluminum oxide ball sample during the impact process, and the pressure data is collected by a pressure sensor array arranged on the impact target surface; Performing feature extraction and deformation analysis on a target image frame in the response image sequence to obtain first test response data, wherein the first test response data is used to indicate whether the aluminum oxide ball specimen undergoes elastic deformation or plastic deformation, and the target image frame is an image between a first moment when the impact force is applied and a second moment when the aluminum oxide ball specimen first contacts the impact target surface; When the first test response data indicates that the aluminum oxide ball sample is elastically deformed, the energy absorbed by the aluminum oxide ball sample during the impact process is estimated according to the pressure data and the test impact force to obtain second test response data; Based on the second test response data, the impact force applied to the alumina ball sample is adjusted, and the adjusted impact force is used for retesting until the first test response data corresponding to the adjusted impact force indicates that the alumina ball sample is plastically deformed, and the test is ended to obtain the impact resistance test result corresponding to the alumina ball sample.

2. The method for testing the impact resistance of an alumina ball according to claim 1, wherein: The performing feature extraction and deformation analysis on the target image frame in the response image sequence to obtain first test response data includes: Performing edge detection on the aluminum oxide ball sample in the target image frame to identify contour information of the aluminum oxide ball sample; The deformation data of the aluminum oxide ball sample in the target image frame is analyzed according to the contour information of the aluminum oxide ball sample, and the first test response data is obtained based on the deformation data.

3. The method for testing the impact resistance of an alumina ball according to claim 2, wherein: The step of analyzing the deformation data of the aluminum oxide ball sample in the target image frame according to the contour information of the aluminum oxide ball sample and obtaining the first test response data based on the deformation data includes: Determine the area and perimeter of the aluminum oxide ball sample in each target image frame according to the contour information; Calculating the deformation rate of the alumina ball sample during the impact process according to the area and the perimeter; The deformation rate is used as deformation data corresponding to each target image frame, and the first test response data is obtained based on a deformation data sequence composed of deformation data corresponding to all target image frames.

4. The method for testing the impact resistance of an alumina ball according to claim 3, wherein: The deformation rate is calculated based on the following formula: Wherein, R represents the deformation rate of the aluminum oxide ball sample, A represents the area of ​​the aluminum oxide ball sample in the target image frame, and C represents the circumference of the aluminum oxide ball sample in the target image frame. Indicates circularity.

5. The method for testing the impact resistance of an alumina ball according to claim 3, wherein: The obtaining of the first test response data based on a deformation data sequence constituted by deformation data corresponding to all the target image frames includes: When the deformation data in the deformation data sequence meets a preset rule, the aluminum oxide ball specimen is determined to be elastically deformed; otherwise, the aluminum oxide ball specimen is determined to be plastically deformed; wherein, the preset rule at least includes that the deformation data in the deformation data sequence shows a monotonically decreasing trend in the stage when the aluminum oxide ball specimen is not subjected to external force, and the minimum value of the deformation data tends to zero.

6. The method for testing the impact resistance of an alumina ball according to claim 1, wherein: The estimating the energy absorbed by the alumina ball sample during the impact process according to the pressure data and the test impact force to obtain second test response data includes: Determine the maximum pressure value of the alumina ball sample when it contacts the impact target surface during the impact process according to the pressure data; The energy absorption amount of the aluminum oxide ball sample during the impact process is estimated according to the maximum pressure value and the test impact force, and the energy absorption amount is used as the second test response data.

7. The method for testing the impact resistance of an alumina ball according to claim 6, wherein: The adjusting the impact force applied to the alumina ball sample based on the second test response data includes: The impact force adjustment amplitude is determined based on the comparison result between the energy absorption amount and the preset energy absorption index; wherein, when the energy absorption amount is greater than the preset energy absorption index, the impact force is increased according to a first proportional coefficient; when the energy absorption amount is less than or equal to the preset energy absorption index, the impact force is increased according to a second proportional coefficient, and the first proportional coefficient is greater than the second proportional coefficient.

8. The method for testing the impact resistance of an alumina ball according to claim 1, wherein: The test is performed again using the adjusted impact force until the first test response data corresponding to the adjusted impact force indicates that the aluminum oxide ball sample is plastically deformed, and the test result of the impact resistance test corresponding to the aluminum oxide ball sample is obtained, including: Obtain the test round number corresponding to the last test and the target impact force corresponding to the second-to-last test; The target impact force is fatigue corrected according to the number of test rounds to obtain a corrected impact force value, and an impact resistance test result corresponding to the alumina ball sample is obtained based on the corrected impact force value.

9. The method for testing the impact resistance of an alumina ball according to claim 8, wherein: The performing fatigue correction on the target impact force according to the number of test rounds includes: Calculating according to the number of test rounds and a preset fatigue correction function to obtain a correction value for the target impact force; compensating the target impact force based on the correction value to obtain a corrected impact force value; The correction value is obtained by multiplying the target impact force by a correction coefficient calculated based on the fatigue correction function. The fatigue correction function is expressed as follows: represents the initial fatigue attenuation coefficient, represents the exponential decay coefficient, Indicates the number of test rounds, represents the linear fatigue accumulation factor, Indicates the fatigue accumulation starting round threshold, represents the normalization operation, Indicates the correction coefficient corresponding to the number of test rounds N.

10. An alumina ball impact resistance testing system, characterized in that: include: An impact device, used to apply a controllable test impact force to the alumina ball sample, the impact device comprising a height-adjustable bearing mechanism and an impact force generating mechanism, and an impact target surface of the impact device is provided with a pressure sensor array; An image acquisition unit, comprising at least one high-speed camera, wherein the high-speed camera is configured to acquire dynamic response images of the alumina ball sample during the impact process at a preset frame rate to obtain a response image sequence; a first data processing unit, configured to perform feature extraction and deformation analysis on a target image frame in the response image sequence to obtain first test response data, wherein the first test response data is used to indicate whether the aluminum oxide ball specimen undergoes elastic deformation or plastic deformation, and the target image frame is an image between a first moment when the impact force is applied and a second moment when the aluminum oxide ball specimen first contacts the impact target surface; a second data processing unit configured to estimate, when the first test response data indicates that the aluminum oxide ball specimen is elastically deformed, an energy absorption amount of the aluminum oxide ball specimen during the impact process based on the pressure data and the test impact force, to obtain second test response data; An impact control unit is used to adjust the impact force applied to the aluminum oxide ball specimen based on the second test response data, and to perform retesting using the adjusted impact force until the first test response data corresponding to the adjusted impact force indicates that the aluminum oxide ball specimen is plastically deformed, thereby terminating the test and obtaining the impact resistance test result corresponding to the aluminum oxide ball specimen.

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