Automatic fatigue test method and system of horizontal electronic universal testing machine

Abstract

The present application relates to the technical field of workpiece fatigue test, and relates to an automatic fatigue test method and system of a horizontal electronic universal testing machine, which comprises the following steps: performing impact test on a test workpiece by using the horizontal electronic universal testing machine according to an initial impact impulse, obtaining a fatigue life set, calculating a fatigue life dispersion degree, judging whether the fatigue life dispersion degree meets a dispersion standard, if not, calculating an iteration test density, calculating an iteration impact impulse set according to the iteration test density and the initial impact impulse, updating the initial impact impulse sequence by using the iteration impact impulse set, and if yes, performing fitness evaluation on the test workpiece. The present application can improve the fatigue test precision of the horizontal electronic universal testing machine.

Description

Technical Field

[0001] This invention relates to the field of workpiece fatigue testing technology, and in particular to an automatic fatigue testing method and system for a horizontal electronic universal testing machine. Background Technology

[0002] The fatigue performance of materials and structural components is a core indicator for evaluating their reliability, durability, and safety, and is an important basis for product design and life prediction in high-end equipment fields such as aerospace, automotive manufacturing, and energy and chemical industries. Horizontal electronic universal testing machines, with their horizontal spindle structure, have significant advantages in testing large components, long-sized samples (such as ship cables, oil pipelines, and automotive suspension rods), and in conducting high-load tensile-compression bidirectional fatigue tests.

[0003] Currently, the mainstream fatigue testing method involves establishing fatigue performance profiles represented by stress-life curves. However, this approach fails to control the distribution interval characteristics of all cyclic impulses throughout the testing process, thus neglecting the sequential information contained in the impulses. Therefore, the automatic fatigue testing of current horizontal electronic universal testing machines suffers from low testing accuracy. Summary of the Invention

[0004] This invention provides an automatic fatigue testing method and system for a horizontal electronic universal testing machine, the main purpose of which is to improve the fatigue testing accuracy of the horizontal electronic universal testing machine.

[0005] To achieve the above objectives, the present invention provides an automatic fatigue testing method for a horizontal electronic universal testing machine, comprising:

[0006] Initial impact impulses are extracted sequentially from a pre-constructed sequence of initial impact impulses, wherein the difference between adjacent initial impact impulses in the sequence is the initial impulse gradient.

[0007] Based on the initial impact impulse, the pre-constructed test workpiece is subjected to impact testing using a pre-constructed horizontal electronic universal testing machine to obtain a fatigue life set.

[0008] Calculate the fatigue life dispersion based on the fatigue life set;

[0009] Determine whether the fatigue life dispersion meets the preset dispersion standard;

[0010] If the fatigue life dispersion does not meet the dispersion standard, then the iterative test density of the initial impact impulse is calculated based on the fatigue life dispersion using the pre-constructed impulse density formula.

[0011] Calculate the iterative impact impulse set based on the iterative test density and the initial impact impulse, update the initial impact impulse sequence using the iterative impact impulse set, and return to the steps described above of sequentially extracting the initial impact impulse from the pre-constructed initial impact impulse sequence.

[0012] If the fatigue life dispersion meets the dispersion standard, then a trigonometric function curve is constructed based on the initial impact impulse sequence;

[0013] The application adaptability of the test workpiece is evaluated based on the preset fatigue application adaptability table and trigonometric function curves, thereby completing the automatic fatigue test of the horizontal electronic universal testing machine.

[0014] Optionally, the step of performing an impact test on a pre-constructed test workpiece using a pre-constructed horizontal electronic universal testing machine based on the initial impact impulse to obtain a fatigue life set includes:

[0015] The initial impact combination parameter set is randomly obtained based on the initial impact impulse, wherein the initial impact combination parameters in the initial impact combination parameter set include: initial impact force and initial impact time, and the initial impact impulse is equal to the product of the initial impact force and the initial impact time.

[0016] Based on the initial impact combination parameters and the preset standard impact frequency in the initial impact combination parameter set, the test workpiece is subjected to impact testing using the horizontal electronic universal testing machine to obtain a fatigue life set. The fatigue life in the fatigue life set refers to the number of impacts that the test workpiece undergoes until fatigue failure occurs under the action of the initial impact combination parameters.

[0017] Optionally, calculating the fatigue life dispersion based on the fatigue life set includes:

[0018] An initial combination parameter sequence is determined based on the initial impact combination parameter set, wherein the initial combination parameter sequence is sorted in ascending order of initial impact force;

[0019] The initial combination parameter coordinate sequence is determined on the dispersion horizontal axis of the pre-constructed dispersion coordinate system based on the initial combination parameter sequence.

[0020] Initial combined parameter coordinates are extracted sequentially from the initial combined parameter coordinate sequence, and the associated fatigue life corresponding to the initial combined parameter coordinates is extracted from the fatigue life set.

[0021] Based on the initial combined parameter coordinates and associated fatigue life, the fatigue life scatter point set is determined in the dispersion coordinate system.

[0022] Calculate the fatigue life mean of the fatigue life set, and construct a life mean line based on the fatigue life mean. The x-coordinate corresponding to the starting point of the life mean line segment is the first initial combined parameter coordinate in the initial combined parameter coordinate sequence, and the x-coordinate corresponding to the ending point of the life mean line segment is the last initial combined parameter coordinate in the initial combined parameter coordinate sequence.

[0023] Based on the fatigue life scatter set, a fatigue life curve is plotted, and the starting point and ending point of the fatigue life curve are identified.

[0024] By connecting the starting point of the line segment to the starting point of the curve, and the ending point of the line segment to the ending point of the curve, a closed region of curve and straight line is obtained;

[0025] Calculate the closed area of ​​the curved and straight closed region, and use the closed area as the fatigue life dispersion.

[0026] Optionally, determining whether the fatigue life dispersion meets a preset dispersion standard includes:

[0027] Identify the initial impulse gradient corresponding to the initial impulse in the initial impulse sequence, and calculate the dispersion standard area based on the initial impulse gradient and a pre-constructed dispersion standard area formula, wherein the dispersion standard area formula is as follows:

[0028]

[0029] Where S represents the standard area of ​​dispersion, δ represents the dependent adjustment coefficient, e represents the natural constant, k represents the independent adjustment coefficient, and x represents the initial impulse gradient corresponding to the initial impact impulse.

[0030] Determine whether the fatigue life dispersion is greater than the dispersion standard area;

[0031] If the fatigue life dispersion is greater than the dispersion standard area, then the fatigue life dispersion does not meet the dispersion standard.

[0032] If the fatigue life dispersion is not greater than the dispersion standard area, then the fatigue life dispersion meets the dispersion standard.

[0033] Optionally, the iterative test density of calculating the initial impact impulse using a pre-constructed impulse density formula based on the fatigue life dispersion includes:

[0034] Based on the fatigue life dispersion and the dispersion standard area, the iterative test density of the initial impact impulse is calculated using the impulse density formula, wherein the impulse density formula is as follows:

[0035]

[0036] Where ρ represents the iterative test density, L represents the test density constant, p represents the density adjustment coefficient, and S' represents the fatigue life dispersion.

[0037] Optionally, calculating the iterative impact impulse set based on the iterative test density and the initial impact impulse includes:

[0038] The iterative impulse gradient is calculated based on the preset inverse proportional formula and the iterative test density.

[0039] Based on the iterative impulse gradient and the initial impulse, the iterative impulse set is calculated using a pre-constructed iterative impulse formula, wherein the iterative impulse formula is as follows:

[0040]

[0041] in, I represents the j-th iterative impact impulse of the i-th initial impact impulse in the initial impact impulse sequence. i Let i represent the i-th initial impact impulse in the initial impact impulse sequence, where a represents an integer, z represents the integer sign, and I' t I represents the iterative impulse gradient of the i-th initial impulse in the initial impulse sequence. i-1 I represents the (i-1)th initial impact impulse in the initial impact impulse sequence. i+1 This represents the (i+1)th initial impact impulse in the initial impact impulse sequence.

[0042] Optionally, constructing the trigonometric function curve based on the initial impact impulse sequence includes:

[0043] Based on the initial impact impulse sequence, scale impulse markings are made on a pre-constructed scale circle to obtain an impulse marking circle;

[0044] Using the pre-constructed unit circle method, an impulse horizontal axis is constructed based on the impulse marking circle, wherein the starting point of the impulse horizontal axis is the center of the impulse marking circle, and the impulse horizontal axis passes through the impulse scale corresponding to the first initial impact impulse in the initial impact impulse sequence in the impulse marking circle.

[0045] Construct an impulse vertical axis based on the impulse marking circle, wherein the starting point of the impulse vertical axis is the center of the impulse marking circle, and the impulse horizontal axis is perpendicular to the impulse vertical axis.

[0046] Extract impulse scales sequentially from the impulse mark circle, and identify the horizontal axis coordinates of the impulse scales on the impulse horizontal axis;

[0047] Identify the associated average fatigue life value corresponding to the impulse scale, and identify the vertical axis coordinate corresponding to the associated average fatigue life value on the impulse vertical axis.

[0048] Based on the horizontal and vertical coordinates, the trigonometric function points are determined, and the trigonometric function point set is obtained.

[0049] By fitting the set of trigonometric function points, the trigonometric function curves are obtained.

[0050] Optionally, the step of marking the impulse on a pre-constructed scale circle according to the initial impact impulse sequence to obtain an impulse marking circle includes:

[0051] Identify the first and last impact impulses in the initial impact impulse sequence;

[0052] The impact impulse span is calculated based on the first and last impact impulses.

[0053] The unit impulse angle is calculated based on the impact impulse span and the preset value of pi, wherein the unit impulse angle is the ratio of pi to the impact impulse span.

[0054] Based on the unit impulse angle, the initial impact impulse sequence is used to mark the impulse on a scale circle to obtain the impulse marking circle.

[0055] Optionally, the step of evaluating the application adaptability of the test workpiece based on a preset fatigue application adaptability table and trigonometric function curves includes:

[0056] Extract the application impulse range of the target application field from the fatigue application self-adaptation table, and identify the application scale range corresponding to the application impulse range based on the impulse horizontal axis.

[0057] Identify the matching impulse arc corresponding to the target application area in the application scale interval;

[0058] Extract the workpiece impulse arc corresponding to the application scale interval from the trigonometric function curve;

[0059] Calculate the area enclosed by the adaptive impulse arc and the workpiece impulse arc, and evaluate the application suitability of the test workpiece based on the area enclosed by the arc.

[0060] To achieve the above objectives, the present invention also provides an automatic fatigue testing system for a horizontal electronic universal testing machine, comprising:

[0061] The fatigue life set calculation module is used to extract the initial impact impulse sequentially from the pre-constructed initial impact impulse sequence, wherein the difference between adjacent initial impact impulses in the initial impact impulse sequence is the initial impulse gradient; based on the initial impact impulse, the pre-constructed test workpiece is subjected to impact testing using a pre-constructed horizontal electronic universal testing machine to obtain the fatigue life set.

[0062] The fatigue life dispersion calculation module is used to calculate the fatigue life dispersion based on the fatigue life set.

[0063] The initial impact impulse sequence update module is used to determine whether the fatigue life dispersion meets the preset dispersion standard; if the fatigue life dispersion does not meet the dispersion standard, the iterative test density of the initial impact impulse is calculated based on the fatigue life dispersion using a pre-constructed impulse density formula; the iterative impact impulse set is calculated based on the iterative test density and the initial impact impulse; the initial impact impulse sequence is updated using the iterative impact impulse set; and the process of extracting the initial impact impulse sequentially from the pre-constructed initial impact impulse sequence is returned.

[0064] The application fitness assessment module is used to construct a trigonometric function curve based on the initial impact impulse sequence if the fatigue life dispersion meets the dispersion standard; and to perform application fitness assessment on the test workpiece based on a preset fatigue application fitness table and trigonometric function curve.

[0065] To address the above problems, the present invention also provides an electronic device, the electronic device comprising:

[0066] A memory that stores at least one instruction; and a processor that executes the instructions stored in the memory to implement the automatic fatigue testing method of the horizontal electronic universal testing machine described above.

[0067] To address the aforementioned problems, the present invention also provides a computer-readable storage medium storing at least one instruction, which is executed by a processor in an electronic device to implement the automatic fatigue testing method of the horizontal electronic universal testing machine described above.

[0068] To address the problems described in the background section, this invention first requires obtaining a fatigue life set of the test workpiece. Since the precision of this fatigue life set is unknown, it needs to be updated. Specifically, it involves sequentially extracting initial impact impulses from a pre-constructed sequence of initial impact impulses, where the difference between adjacent initial impact impulses in the sequence is the initial impulse gradient. Then, based on these initial impact impulses, an impact test is performed on the pre-constructed test workpiece using a pre-constructed horizontal electronic universal testing machine to obtain the fatigue life set. At this point, the precision of the fatigue life set can be evaluated. Specifically, this involves calculating the fatigue life dispersion based on the fatigue life set and determining whether the fatigue life dispersion is... If the fatigue life dispersion does not meet the preset dispersion standard, then based on the fatigue life dispersion, the iterative test density of the initial impact impulse is calculated using the impulse density formula. Then, based on the iterative test density and the initial impact impulse, an iterative impact impulse set is calculated. At this point, the initial impact impulse sequence can be updated using the iterative impact impulse set. Then, the process returns to the step of sequentially extracting the initial impact impulse from the initial impact impulse sequence. If the fatigue life dispersion meets the dispersion standard, a trigonometric function curve can be constructed based on the initial impact impulse sequence. Then, based on the preset fatigue application adaptability table and the trigonometric function curve, the application adaptability of the test workpiece is evaluated. Therefore, this invention can improve the fatigue testing accuracy of a horizontal electronic universal testing machine. Attached Figure Description

[0069] Figure 1 This is a flowchart illustrating an automatic fatigue testing method for a horizontal electronic universal testing machine according to an embodiment of the present invention.

[0070] Figure 2 A functional block diagram of an automatic fatigue testing system for a horizontal electronic universal testing machine provided in an embodiment of the present invention;

[0071] Figure 3 This is a schematic diagram of the structure of an electronic device that implements the automatic fatigue testing method of the horizontal electronic universal testing machine according to an embodiment of the present invention.

[0072] Explanation of reference numerals in the attached figures:

[0073] 10. Electronic device; 11. Processor; 12. Memory; 13. Bus.

[0074] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0075] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0076] This application provides an automatic fatigue testing method for a horizontal electronic universal testing machine. The execution entity of the automatic fatigue testing method for the horizontal electronic universal testing machine includes, but is not limited to, at least one of the following electronic devices that can be configured to execute the method provided in this application embodiment: a server, a terminal, etc. In other words, the automatic fatigue testing method for the horizontal electronic universal testing machine can be executed by software or hardware installed on a terminal device or a server device, and the software can be a blockchain platform. The server includes, but is not limited to, a single server, a server cluster, a cloud server, or a cloud server cluster.

[0077] Reference Figure 1 The diagram shown is a flowchart illustrating an automatic fatigue testing method for a horizontal electronic universal testing machine according to an embodiment of the present invention. In this embodiment, the automatic fatigue testing method for the horizontal electronic universal testing machine includes:

[0078] S1. Extract the initial impact impulse sequentially from the pre-constructed initial impact impulse sequence, wherein the difference between adjacent initial impact impulses in the initial impact impulse sequence is the initial impulse gradient.

[0079] Understandably, the initial impact impulse sequence refers to the sequence of impact impulses initially set for fatigue testing of the test workpiece. For example, the initial impact impulse sequence can be: 2 N·s, 4 N·s, 6 N·s, ..., 20 N·s. The initial impact impulse refers to the initially set impact impulse, and the adjacent initial impact impulses refer to two adjacent initial impact impulses. The initial impulse gradient refers to the gradient of change of the initial impact impulse, which can be 2 N·s.

[0080] S2. Based on the initial impact impulse, the pre-constructed test workpiece is subjected to impact testing using a pre-constructed horizontal electronic universal testing machine to obtain a fatigue life set.

[0081] Furthermore, the test workpiece refers to the workpiece that needs to undergo impact testing. The fatigue life set refers to the set of fatigue lives obtained after impact testing the test workpiece while keeping the initial impact impulse and the preset standard impact frequency constant.

[0082] In this embodiment of the invention, the step of performing an impact test on a pre-constructed test workpiece using a pre-constructed horizontal electronic universal testing machine based on the initial impact impulse to obtain a fatigue life set includes:

[0083] The initial impact combination parameter set is randomly obtained based on the initial impact impulse, wherein the initial impact combination parameters in the initial impact combination parameter set include: initial impact force and initial impact time, and the initial impact impulse is equal to the product of the initial impact force and the initial impact time.

[0084] Based on the initial impact combination parameters and the preset standard impact frequency in the initial impact combination parameter set, the test workpiece is subjected to impact testing using the horizontal electronic universal testing machine to obtain a fatigue life set. The fatigue life in the fatigue life set refers to the number of impacts that the test workpiece undergoes until fatigue failure occurs under the action of the initial impact combination parameters.

[0085] Understandably, the initial impact parameter set refers to a set of combined parameters that conform to the initial impact impulse. For example, when the initial impact impulse is 10 N·s, the initial impact force can be 2 N and the initial impact time can be 5 s; the initial impact force can be 10 N and the initial impact time can be 1 s; the initial impact force can be 100 N and the initial impact time can be 0.1 s, etc. The standard impact frequency can be set to 100 times / min. The horizontal electronic universal testing machine is an existing device. This device is suitable for testing the mechanical properties of non-metallic materials and analyzing their technological properties. With appropriate tooling, it can perform tensile, compression, bending, shear, tearing, and peeling tests on the test workpiece. It can automatically calculate parameters such as maximum test force, breaking force, elongation, tensile strength, yield strength, compressive strength, elastic modulus, shear strength, tear strength, and peel strength. It can also perform tests requiring constant elongation stress, constant stress elongation, and load holding. The horizontal electronic universal testing machine can also perform fatigue testing. It can perform fatigue testing on the test workpiece in the form of sine wave, triangle wave, square wave, combined wave, etc. At the same time, parameters such as impact force, impact time, test frequency, amplitude, and number of cycles can be set, and the test frequency, impact force, amplitude, number of cycles, test curve, etc. can be displayed in real time.

[0086] S3. Calculate the fatigue life dispersion based on the fatigue life set.

[0087] Understandably, the fatigue life dispersion refers to the degree of dispersion of fatigue life in the fatigue life concentration, as detailed in the following embodiments.

[0088] In this embodiment of the invention, calculating the fatigue life dispersion based on the fatigue life set includes:

[0089] An initial combination parameter sequence is determined based on the initial impact combination parameter set, wherein the initial combination parameter sequence is sorted in ascending order of initial impact force;

[0090] The initial combination parameter coordinate sequence is determined on the dispersion horizontal axis of the pre-constructed dispersion coordinate system based on the initial combination parameter sequence.

[0091] Initial combined parameter coordinates are extracted sequentially from the initial combined parameter coordinate sequence, and the associated fatigue life corresponding to the initial combined parameter coordinates is extracted from the fatigue life set.

[0092] Based on the initial combined parameter coordinates and associated fatigue life, the fatigue life scatter point set is determined in the dispersion coordinate system.

[0093] Calculate the fatigue life mean of the fatigue life set, and construct a life mean line based on the fatigue life mean. The x-coordinate corresponding to the starting point of the life mean line segment is the first initial combined parameter coordinate in the initial combined parameter coordinate sequence, and the x-coordinate corresponding to the ending point of the life mean line segment is the last initial combined parameter coordinate in the initial combined parameter coordinate sequence.

[0094] Based on the fatigue life scatter set, a fatigue life curve is plotted, and the starting point and ending point of the fatigue life curve are identified.

[0095] By connecting the starting point of the line segment to the starting point of the curve, and the ending point of the line segment to the ending point of the curve, a closed region of curve and straight line is obtained;

[0096] Calculate the closed area of ​​the curved and straight closed region, and use the closed area as the fatigue life dispersion.

[0097] Understandably, the initial combination parameter sequence refers to the sequence composed based on the initial impact combination parameters. The dispersion coordinate system refers to the coordinate system used to calculate the dispersion of fatigue life. The dispersion coordinate system includes a dispersion horizontal axis and a dispersion vertical axis, wherein the dispersion horizontal axis is used to represent the coordinates of the initial combination parameters, and the dispersion vertical axis represents the fatigue life.

[0098] Further, the initial combined parameter coordinate sequence refers to the sequence of coordinate points determined based on the initial combined parameter sequence. The difference between adjacent initial combined parameter coordinates in the initial combined parameter coordinate sequence can be 1. The associated fatigue life refers to the fatigue life corresponding to the initial combined parameter coordinates in the impact test. The fatigue life scatter set refers to the scatter set representing the correspondence between the initial combined parameter coordinates and the associated fatigue life.

[0099] Understandably, the fatigue life mean refers to the mean of the fatigue life set. The fatigue life mean line refers to the line segment representing the fatigue life mean. The fatigue life curve refers to the curve fitted based on the fatigue life scatter plot. The curved-straight closed region refers to the closed region enclosed by the fatigue life curve and the fatigue life mean line. The closed area refers to the area of ​​the curved-straight closed region.

[0100] S4. Determine whether the fatigue life dispersion meets the preset dispersion standard.

[0101] Understandably, the dispersion standard refers to the standard used to measure whether the fatigue life dispersion is qualified.

[0102] In this embodiment of the invention, determining whether the fatigue life dispersion meets a preset dispersion standard includes:

[0103] Identify the initial impulse gradient corresponding to the initial impulse in the initial impulse sequence, and calculate the dispersion standard area based on the initial impulse gradient and a pre-constructed dispersion standard area formula, wherein the dispersion standard area formula is as follows:

[0104]

[0105] Where S represents the standard area of ​​dispersion, δ represents the dependent adjustment coefficient, e represents the natural constant, k represents the independent adjustment coefficient, and x represents the initial impulse gradient corresponding to the initial impact impulse.

[0106] Determine whether the fatigue life dispersion is greater than the dispersion standard area;

[0107] If the fatigue life dispersion is greater than the dispersion standard area, then the fatigue life dispersion does not meet the dispersion standard.

[0108] If the fatigue life dispersion is not greater than the dispersion standard area, then the fatigue life dispersion meets the dispersion standard.

[0109] Furthermore, the dispersion standard area refers to the standard area value used to judge the pass / failability of fatigue life dispersion, which can be set by the user according to actual testing needs. The dependent variable adjustment coefficient refers to the coefficient that adjusts the dependent variable in the dispersion standard area formula, and the independent variable adjustment coefficient refers to the coefficient that adjusts the independent variable in the dispersion standard area formula. The initial impulse gradient corresponding to the initial impact impulse refers to the neighbor gradient corresponding to the initial impact impulse. For example, when the initial impact impulse is 6 N·s, the left neighbor initial impact impulse of the unupdated initial impact impulse of 6 N·s is 4 N·s, and the right neighbor initial impact impulse is 8 N·s. After the update, the left neighbor initial impact impulse of the initial impact impulse of 6 N·s is 5 N·s, and the right neighbor initial impact impulse is 7 N·s. Then, the initial impulse gradient corresponding to the initial impact impulse changes from 2 N·s to 1 N·s.

[0110] If the fatigue life dispersion does not meet the dispersion standard, then execute S5: calculate the iterative test density of the initial impact impulse using the pre-constructed impulse density formula based on the fatigue life dispersion.

[0111] Furthermore, the impulse density formula refers to the formula for calculating the density of initial impact impulse values, as detailed in the following embodiments. The iterative test density refers to the density of values ​​taken near the initial impact impulse, calculated based on the fatigue life dispersion.

[0112] In this embodiment of the invention, the iterative test density for calculating the initial impact impulse using a pre-constructed impulse density formula based on the fatigue life dispersion includes:

[0113] Based on the fatigue life dispersion and the dispersion standard area, the iterative test density of the initial impact impulse is calculated using the impulse density formula, wherein the impulse density formula is as follows:

[0114]

[0115] Where ρ represents the iterative test density, L represents the test density constant, p represents the density adjustment coefficient, and S' represents the fatigue life dispersion.

[0116] Understandably, the test density constant and the density adjustment coefficient can be set by the user according to the test requirements. The smaller the test density constant, the higher the test accuracy of the test workpiece. The larger the density adjustment coefficient, the higher the test accuracy of the test workpiece.

[0117] S6. Calculate the iterative impact impulse set based on the iterative test density and the initial impact impulse, and update the initial impact impulse sequence using the iterative impact impulse set.

[0118] Understandably, the iterative impact impulse set refers to the set of impact impulses whose value density is adjusted for impact impulses near the initial impact impulse.

[0119] For example, when the initial impact impulse around the initial impact impulse of 6 N·S is 4 N·S, 6 N·S, or 8 N·S, the iterative impact impulse set can be 4.2 N·S, 4.4 N·S, 4.6 N·S, ..., 7.8 N·S.

[0120] In this embodiment of the invention, calculating the iterative impact impulse set based on the iterative test density and the initial impact impulse includes:

[0121] The iterative impulse gradient is calculated based on the preset inverse proportional formula and the iterative test density.

[0122] Based on the iterative impulse gradient and the initial impulse, the iterative impulse set is calculated using a pre-constructed iterative impulse formula, wherein the iterative impulse formula is as follows:

[0123]

[0124] in, I represents the j-th iterative impact impulse of the i-th initial impact impulse in the initial impact impulse sequence. i Let i represent the i-th initial impact impulse in the initial impact impulse sequence, where a represents an integer, z represents the integer sign, and I' t I represents the iterative impulse gradient of the i-th initial impulse in the initial impulse sequence. i-1 I represents the (i-1)th initial impact impulse in the initial impact impulse sequence. i+1 This represents the (i+1)th initial impact impulse in the initial impact impulse sequence.

[0125] Furthermore, the inverse proportional formula can be I' t ×ρ=m, where m is a user-defined constant. The iterative impulse gradient refers to the impulse gradient that updates the initial impact impulse.

[0126] For example, when the iterative impulse gradient is 0.2 N·S, and the initial impulse around the initial impulse of 6 N·S is 4 N·S, 6 N·S, or 8 N·S, the iterative impulse set can be 4.2 N·S, 4.4 N·S, 4.6 N·S, ..., 7.8 N·S.

[0127] Return to the steps described above for sequentially extracting the initial impact impulse from the pre-constructed initial impact impulse sequence.

[0128] If the fatigue life dispersion meets the dispersion standard, then execute S7 to construct a trigonometric function curve based on the initial impact impulse sequence.

[0129] Understandably, the trigonometric function curve refers to the curve representing the relationship between the initial impact impulse sequence and fatigue life, as detailed in the following embodiments.

[0130] In this embodiment of the invention, constructing the trigonometric function curve based on the initial impact impulse sequence includes:

[0131] Based on the initial impact impulse sequence, scale impulse markings are made on a pre-constructed scale circle to obtain an impulse marking circle;

[0132] Using the pre-constructed unit circle method, an impulse horizontal axis is constructed based on the impulse marking circle, wherein the starting point of the impulse horizontal axis is the center of the impulse marking circle, and the impulse horizontal axis passes through the impulse scale corresponding to the first initial impact impulse in the initial impact impulse sequence in the impulse marking circle.

[0133] Construct an impulse vertical axis based on the impulse marking circle, wherein the starting point of the impulse vertical axis is the center of the impulse marking circle, and the impulse horizontal axis is perpendicular to the impulse vertical axis.

[0134] Extract impulse scales sequentially from the impulse mark circle, and identify the horizontal axis coordinates of the impulse scales on the impulse horizontal axis;

[0135] Identify the associated average fatigue life value corresponding to the impulse scale, and identify the vertical axis coordinate corresponding to the associated average fatigue life value on the impulse vertical axis.

[0136] Based on the horizontal and vertical coordinates, the trigonometric function points are determined, and the trigonometric function point set is obtained.

[0137] By fitting the set of trigonometric function points, the trigonometric function curves are obtained.

[0138] Understandably, the scale circle can be marked with 1-degree intervals. The impulse marking circle refers to the marking circle after associating the initial impact impulse with the scale markings on the scale circle. The unit circle method is prior art and will not be elaborated here. The impulse horizontal axis refers to the horizontal axis representing the initial impact impulse sequence constructed according to the unit circle method. The impulse vertical axis refers to the vertical axis representing the fatigue life of the tested workpiece. The impulse scale refers to the scale representing the initial impact impulse. As can be seen from the unit circle method, the impulse scale has a corresponding horizontal axis coordinate on the impulse horizontal axis. For example, when the impulse scale is... The impulse is represented on the horizontal axis. The coordinates are the corresponding horizontal axis coordinates. The associated average fatigue life refers to the average fatigue life of the initial impact impulse corresponding to the impulse scale. The trigonometric function point refers to the coordinate point representing the correspondence between the initial impact impulse and the average fatigue life.

[0139] In this embodiment of the invention, the step of marking impulses on a pre-constructed scale circle according to the initial impact impulse sequence to obtain an impulse marking circle includes:

[0140] Identify the first and last impact impulses in the initial impact impulse sequence;

[0141] The impact impulse span is calculated based on the first and last impact impulses.

[0142] The unit impulse angle is calculated based on the impact impulse span and the preset value of pi, wherein the unit impulse angle is the ratio of pi to the impact impulse span.

[0143] Based on the unit impulse angle, the initial impact impulse sequence is used to mark the impulse on a scale circle to obtain the impulse marking circle.

[0144] Understandably, the first impact impulse refers to the first initial impact impulse in the initial impact impulse sequence, and the last impact impulse refers to the last initial impact impulse in the initial impact impulse sequence. The impact impulse span refers to the difference between the first and last impact impulses. The unit impulse angle refers to the circumferential angle corresponding to the unit impulse.

[0145] S8. Evaluate the application adaptability of the test workpiece according to the preset fatigue application adaptability table and trigonometric function curve, and complete the automatic fatigue test of the horizontal electronic universal testing machine.

[0146] Understandably, the fatigue application adaptive table refers to a data table that records the optimal trigonometric function curves corresponding to workpieces in various fields. Since the applicable scenarios for workpieces in different application fields are different, the trigonometric function curves suitable for workpieces in different application fields are different.

[0147] In this embodiment of the invention, the step of evaluating the application adaptability of the test workpiece based on a preset fatigue application adaptability table and trigonometric function curves includes:

[0148] Extract the application impulse range of the target application field from the fatigue application self-adaptation table, and identify the application scale range corresponding to the application impulse range based on the impulse horizontal axis.

[0149] Identify the matching impulse arc corresponding to the target application area in the application scale interval;

[0150] Extract the workpiece impulse arc corresponding to the application scale interval from the trigonometric function curve;

[0151] Calculate the area enclosed by the adaptive impulse arc and the workpiece impulse arc, and evaluate the application suitability of the test workpiece based on the area enclosed by the arc.

[0152] Further, the target application area refers to the application area of ​​the workpiece to be evaluated, and the application impulse range refers to the commonly used impulse range of the target application area, which can be [6 N·s, 10 N·s]. The application scale range refers to the scale range corresponding to the application impulse range on the impulse horizontal axis. The matching impulse arc refers to the arc segment in the tested trigonometric function curve that is most suitable for the workpiece in the target application area and belongs to the application scale range. The workpiece impulse arc refers to the arc segment in the trigonometric function curve of the tested workpiece that belongs to the application scale range. The arc enclosed area refers to the area of ​​the region enclosed by the matching impulse arc and the workpiece impulse arc. The smaller the arc enclosed area, the more suitable the tested workpiece is for the target application area.

[0153] Understandably, during the application suitability evaluation of the test workpiece, evaluation intervals can be set according to user needs. For example, the evaluation intervals can be: a first evaluation interval [0, 5], a second evaluation interval [5, 10], a third evaluation interval [10, 15], a fourth evaluation interval [15, 20], etc., where the area enclosed by the arcs of the adapting impulse arc and the workpiece impulse arc is 2.5 cm². 2 When the application adaptability evaluation result is the first evaluation interval; when the area enclosed by the adaptive impulse arc and the workpiece impulse arc is 7.5 cm². 2 When the application fitness evaluation result is the second evaluation interval, the smaller the number of the evaluation interval to which the arc-enclosed area belongs, the more suitable the test workpiece is for the target application field.

[0154] To address the problems described in the background section, this invention first requires obtaining a fatigue life set of the test workpiece. Since the precision of this fatigue life set is unknown, it needs to be updated. Specifically, it involves sequentially extracting initial impact impulses from a pre-constructed sequence of initial impact impulses, where the difference between adjacent initial impact impulses in the sequence is the initial impulse gradient. Then, based on these initial impact impulses, an impact test is performed on the pre-constructed test workpiece using a pre-constructed horizontal electronic universal testing machine to obtain the fatigue life set. At this point, the precision of the fatigue life set can be evaluated. Specifically, this involves calculating the fatigue life dispersion based on the fatigue life set and determining whether the fatigue life dispersion is... If the fatigue life dispersion does not meet the preset dispersion standard, then based on the fatigue life dispersion, the iterative test density of the initial impact impulse is calculated using the impulse density formula. Then, based on the iterative test density and the initial impact impulse, an iterative impact impulse set is calculated. At this point, the initial impact impulse sequence can be updated using the iterative impact impulse set. Then, the process returns to the step of sequentially extracting the initial impact impulse from the initial impact impulse sequence. If the fatigue life dispersion meets the dispersion standard, a trigonometric function curve can be constructed based on the initial impact impulse sequence. Then, based on the preset fatigue application adaptability table and the trigonometric function curve, the application adaptability of the test workpiece is evaluated. Therefore, this invention can improve the fatigue testing accuracy of a horizontal electronic universal testing machine.

[0155] like Figure 2 The diagram shown is a functional block diagram of an automatic fatigue testing system for a horizontal electronic universal testing machine provided in an embodiment of the present invention.

[0156] The automatic fatigue testing system 100 of the horizontal electronic universal testing machine described in this invention can be installed in an electronic device. Depending on the functions implemented, the automatic fatigue testing system 100 of the horizontal electronic universal testing machine may include a fatigue life set calculation module 101, a fatigue life dispersion calculation module 102, an initial impact impulse sequence update module 103, and an application fitness evaluation module 104. The module described in this invention can also be called a unit, which refers to a series of computer program segments that can be executed by the processor of an electronic device and can perform a fixed function, and is stored in the memory of the electronic device.

[0157] The fatigue life set calculation module 101 is used to extract the initial impact impulse sequentially from the pre-constructed initial impact impulse sequence, wherein the difference between adjacent initial impact impulses in the initial impact impulse sequence is the initial impulse gradient; based on the initial impact impulse, the pre-constructed test workpiece is subjected to impact testing using a pre-constructed horizontal electronic universal testing machine to obtain the fatigue life set.

[0158] The fatigue life dispersion calculation module 102 is used to calculate the fatigue life dispersion based on the fatigue life set.

[0159] The initial impact impulse sequence update module 103 is used to determine whether the fatigue life dispersion meets the preset dispersion standard; if the fatigue life dispersion does not meet the dispersion standard, the iterative test density of the initial impact impulse is calculated according to the fatigue life dispersion using the pre-constructed impulse density formula; the iterative impact impulse set is calculated according to the iterative test density and the initial impact impulse, the initial impact impulse sequence is updated using the iterative impact impulse set, and the process of extracting the initial impact impulse sequentially from the pre-constructed initial impact impulse sequence is returned.

[0160] The application fitness evaluation module 104 is used to construct a trigonometric function curve based on the initial impact impulse sequence if the fatigue life dispersion meets the dispersion standard; and to evaluate the application fitness of the test workpiece based on the preset fatigue application fitness table and trigonometric function curve.

[0161] In detail, the modules in the automatic fatigue testing system 100 of the horizontal electronic universal testing machine described in this embodiment of the invention employ the same methods as described above during use. Figure 1 The automatic fatigue testing method of the horizontal electronic universal testing machine described herein uses the same technical means and can produce the same technical effect, so it will not be repeated here.

[0162] like Figure 3 The diagram shown is a structural schematic of an electronic device for implementing an automatic fatigue testing method for a horizontal electronic universal testing machine, according to an embodiment of the present invention.

[0163] The electronic device 1 may include a processor 10, a memory 11 and a bus 12, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as an automatic fatigue testing method program for a horizontal electronic universal testing machine.

[0164] The memory 11 includes at least one type of readable storage medium, such as flash memory, portable hard drive, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 11 can be an internal storage unit of the electronic device 1, such as a portable hard drive. In other embodiments, the memory 11 can be an external storage device of the electronic device 1, such as a plug-in portable hard drive, smart media card (SMC), secure digital card (SD), flash card, etc., equipped on the electronic device 1. Furthermore, the memory 11 includes both internal storage units and external storage devices of the electronic device 1. The memory 11 can be used not only to store application software and various types of data installed on the electronic device 1, such as the code of an automatic fatigue testing method program for a horizontal electronic universal testing machine, but also to temporarily store data that has been output or will be output.

[0165] In some embodiments, the processor 10 may be composed of integrated circuits, such as a single packaged integrated circuit or multiple integrated circuits with the same or different functions, including combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor 10 is the control unit of the electronic device, connecting various components of the entire electronic device through various interfaces and lines. It executes programs or modules stored in the memory 11 (e.g., an automatic fatigue testing method program for a horizontal electronic universal testing machine) and calls data stored in the memory 11 to perform various functions of the electronic device 1 and process data.

[0166] The bus 12 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 12 can be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to realize the connection and communication between the memory 11 and at least one processor 10, etc.

[0167] Figure 3 Only electronic devices with components are shown; it will be understood by those skilled in the art that... Figure 3 The structure shown does not constitute a limitation on the electronic device 1, and may include fewer or more components than shown, or combine certain components, or have different component arrangements.

[0168] For example, although not shown, the electronic device 1 may also include a power supply (such as a battery) to power various components. Preferably, the power supply can be logically connected to the at least one processor 10 through a power management device, thereby enabling functions such as charging management, discharging management, and power consumption management. The power supply may also include one or more DC or AC power supplies, recharging devices, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components. The electronic device 1 may also include various sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be described in detail here.

[0169] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a Wi-Fi interface, a Bluetooth interface, etc.), which is typically used to establish communication connections between the electronic device 1 and other electronic devices.

[0170] Optionally, the electronic device 1 may further include a user interface, which may be a display, an input unit (such as a keyboard), or a standard wired or wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. The display may also be appropriately referred to as a screen or display unit, used to display information processed in the electronic device 1 and to display a visual user interface.

[0171] The automatic fatigue testing method program for the horizontal electronic universal testing machine stored in the memory 11 of the electronic device 1 is a combination of multiple instructions. When run in the processor 10, it can achieve the following:

[0172] Initial impact impulses are extracted sequentially from a pre-constructed sequence of initial impact impulses, wherein the difference between adjacent initial impact impulses in the sequence is the initial impulse gradient.

[0173] Based on the initial impact impulse, the pre-constructed test workpiece is subjected to impact testing using a pre-constructed horizontal electronic universal testing machine to obtain a fatigue life set.

[0174] Calculate the fatigue life dispersion based on the fatigue life set;

[0175] Determine whether the fatigue life dispersion meets the preset dispersion standard;

[0176] If the fatigue life dispersion does not meet the dispersion standard, then the iterative test density of the initial impact impulse is calculated based on the fatigue life dispersion using the pre-constructed impulse density formula.

[0177] Calculate the iterative impact impulse set based on the iterative test density and the initial impact impulse, update the initial impact impulse sequence using the iterative impact impulse set, and return to the steps described above of sequentially extracting the initial impact impulse from the pre-constructed initial impact impulse sequence.

[0178] If the fatigue life dispersion meets the dispersion standard, then a trigonometric function curve is constructed based on the initial impact impulse sequence;

[0179] The application adaptability of the test workpiece is evaluated based on the preset fatigue application adaptability table and trigonometric function curves, thereby completing the automatic fatigue test of the horizontal electronic universal testing machine.

[0180] Specifically, the processor 10's implementation method for the above instructions can be found in [reference needed]. Figures 1 to 3 The descriptions of the relevant steps in the corresponding embodiments are not repeated here.

[0181] Furthermore, if the modules / units integrated in the electronic device 1 are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, or a read-only memory (ROM).

[0182] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor of an electronic device, can perform the following:

[0183] Initial impact impulses are extracted sequentially from a pre-constructed sequence of initial impact impulses, wherein the difference between adjacent initial impact impulses in the sequence is the initial impulse gradient.

[0184] Based on the initial impact impulse, the pre-constructed test workpiece is subjected to impact testing using a pre-constructed horizontal electronic universal testing machine to obtain a fatigue life set.

[0185] Calculate the fatigue life dispersion based on the fatigue life set;

[0186] Determine whether the fatigue life dispersion meets the preset dispersion standard;

[0187] If the fatigue life dispersion does not meet the dispersion standard, then the iterative test density of the initial impact impulse is calculated based on the fatigue life dispersion using the pre-constructed impulse density formula.

[0188] Calculate the iterative impact impulse set based on the iterative test density and the initial impact impulse, update the initial impact impulse sequence using the iterative impact impulse set, and return to the steps described above of sequentially extracting the initial impact impulse from the pre-constructed initial impact impulse sequence.

[0189] If the fatigue life dispersion meets the dispersion standard, then a trigonometric function curve is constructed based on the initial impact impulse sequence;

[0190] The application adaptability of the test workpiece is evaluated based on the preset fatigue application adaptability table and trigonometric function curves, thereby completing the automatic fatigue test of the horizontal electronic universal testing machine.

[0191] In the embodiments provided by this invention, it should be understood that the disclosed devices, systems, and methods can be implemented in other ways. For example, the system embodiments described above are merely illustrative, and actual implementations may have other classification methods.

[0192] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0193] Furthermore, the functional modules in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional modules.

[0194] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0195] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An automatic fatigue testing method for a horizontal electronic universal testing machine, characterized in that, The method includes: Initial impact impulses are extracted sequentially from a pre-constructed sequence of initial impact impulses, wherein the difference between adjacent initial impact impulses in the sequence is the initial impulse gradient. Based on the initial impact impulse, the pre-constructed test workpiece is subjected to impact testing using a pre-constructed horizontal electronic universal testing machine to obtain a fatigue life set. Calculate the fatigue life dispersion based on the fatigue life set; Determine whether the fatigue life dispersion meets the preset dispersion standard; If the fatigue life dispersion does not meet the dispersion standard, then the iterative test density of the initial impact impulse is calculated based on the fatigue life dispersion using the pre-constructed impulse density formula. Calculate the iterative impact impulse set based on the iterative test density and the initial impact impulse, update the initial impact impulse sequence using the iterative impact impulse set, and return to the steps described above of sequentially extracting the initial impact impulse from the pre-constructed initial impact impulse sequence. If the fatigue life dispersion meets the dispersion standard, then a trigonometric function curve is constructed based on the initial impact impulse sequence; The application adaptability of the test workpiece is evaluated based on the preset fatigue application adaptability table and trigonometric function curves, and the automatic fatigue test of the horizontal electronic universal testing machine is completed. The process involves using a pre-built horizontal electronic universal testing machine to perform impact tests on a pre-built test workpiece based on the initial impact impulse to obtain a fatigue life set, including: The initial impact combination parameter set is randomly obtained based on the initial impact impulse, wherein the initial impact combination parameters in the initial impact combination parameter set include: initial impact force and initial impact time, and the initial impact impulse is equal to the product of the initial impact force and the initial impact time. Based on the initial impact combination parameters and the preset standard impact frequency in the initial impact combination parameter set, the test workpiece is subjected to impact testing using the horizontal electronic universal testing machine to obtain a fatigue life set. The fatigue life in the fatigue life set refers to the number of impacts that the test workpiece undergoes until fatigue failure occurs under the action of the initial impact combination parameters. The calculation of fatigue life dispersion based on the fatigue life set includes: An initial combination parameter sequence is determined based on the initial impact combination parameter set, wherein the initial combination parameter sequence is sorted in ascending order of initial impact force; The initial combination parameter coordinate sequence is determined on the dispersion horizontal axis of the pre-constructed dispersion coordinate system based on the initial combination parameter sequence. Initial combined parameter coordinates are extracted sequentially from the initial combined parameter coordinate sequence, and the associated fatigue life corresponding to the initial combined parameter coordinates is extracted from the fatigue life set. Based on the initial combined parameter coordinates and associated fatigue life, the fatigue life scatter point set is determined in the dispersion coordinate system. Calculate the fatigue life mean of the fatigue life set, and construct a life mean line based on the fatigue life mean. The x-coordinate corresponding to the starting point of the life mean line segment is the first initial combined parameter coordinate in the initial combined parameter coordinate sequence, and the x-coordinate corresponding to the ending point of the life mean line segment is the last initial combined parameter coordinate in the initial combined parameter coordinate sequence. Based on the fatigue life scatter set, a fatigue life curve is plotted, and the starting point and ending point of the fatigue life curve are identified. By connecting the starting point of the line segment to the starting point of the curve, and the ending point of the line segment to the ending point of the curve, a closed region of curve and straight line is obtained; Calculate the closed area of ​​the curved and straight closed region, and use the closed area as the fatigue life dispersion. The step of determining whether the fatigue life dispersion meets the preset dispersion standard includes: Identify the initial impulse gradient corresponding to the initial impulse in the initial impulse sequence, and calculate the dispersion standard area based on the initial impulse gradient and a pre-constructed dispersion standard area formula, wherein the dispersion standard area formula is as follows: in, Represents the standard area of ​​dispersion. This represents the dependent adjustment coefficient. Represents the natural constant. Represents the independent adjustment coefficient. This represents the initial impulse gradient corresponding to the initial impact impulse; Determine whether the fatigue life dispersion is greater than the dispersion standard area; If the fatigue life dispersion is greater than the dispersion standard area, then the fatigue life dispersion does not meet the dispersion standard. If the fatigue life dispersion is not greater than the dispersion standard area, then the fatigue life dispersion meets the dispersion standard. The iterative test density for calculating the initial impact impulse using a pre-constructed impulse density formula based on the fatigue life dispersion includes: Based on the fatigue life dispersion and the dispersion standard area, the iterative test density of the initial impact impulse is calculated using the impulse density formula, wherein the impulse density formula is as follows: in, Indicates the iterative test density. Indicates the test density constant. This represents the density adjustment coefficient. Indicates the dispersion of fatigue life; The step of calculating the iterative impact impulse set based on the iterative test density and the initial impact impulse includes: The iterative impulse gradient is calculated based on the preset inverse proportional formula and the iterative test density. Based on the iterative impulse gradient and the initial impulse, the iterative impulse set is calculated using a pre-constructed iterative impulse formula, wherein the iterative impulse formula is as follows: in, Let J represent the j-th iterative impact impulse of the i-th initial impact impulse in the initial impact impulse sequence. This represents the i-th initial impact impulse in the initial impact impulse sequence. Represents integers, Represents the sign of an integer. This represents the iterative impulse gradient of the i-th initial impulse in the initial impulse sequence. This represents the (i-1)th initial impact impulse in the initial impact impulse sequence. This represents the (i+1)th initial impact impulse in the initial impact impulse sequence.

2. The automatic fatigue testing method of the horizontal electronic universal testing machine as described in claim 1, characterized in that, The construction of the trigonometric function curve based on the initial impact impulse sequence includes: Based on the initial impact impulse sequence, scale impulse markings are made on a pre-constructed scale circle to obtain an impulse marking circle; Using the pre-constructed unit circle method, an impulse horizontal axis is constructed based on the impulse marking circle, wherein the starting point of the impulse horizontal axis is the center of the impulse marking circle, and the impulse horizontal axis passes through the impulse scale corresponding to the first initial impact impulse in the initial impact impulse sequence in the impulse marking circle. Construct an impulse vertical axis based on the impulse marking circle, wherein the starting point of the impulse vertical axis is the center of the impulse marking circle, and the impulse horizontal axis is perpendicular to the impulse vertical axis. Extract impulse scales sequentially from the impulse mark circle, and identify the horizontal axis coordinates of the impulse scales on the impulse horizontal axis; Identify the associated average fatigue life value corresponding to the impulse scale, and identify the vertical axis coordinate corresponding to the associated average fatigue life value on the impulse vertical axis. Based on the horizontal and vertical coordinates, the trigonometric function points are determined, and the trigonometric function point set is obtained. By fitting the set of trigonometric function points, the trigonometric function curves are obtained.

3. The automatic fatigue testing method of the horizontal electronic universal testing machine as described in claim 2, characterized in that, The step of marking impulses on a pre-constructed scale circle based on the initial impact impulse sequence to obtain an impulse marking circle includes: Identify the first and last impact impulses in the initial impact impulse sequence; The impact impulse span is calculated based on the first and last impact impulses. The unit impulse angle is calculated based on the impact impulse span and the preset value of pi, wherein the unit impulse angle is the ratio of pi to the impact impulse span. Based on the unit impulse angle, the initial impact impulse sequence is used to mark the impulse on a scale circle to obtain the impulse marking circle.

4. The automatic fatigue testing method of the horizontal electronic universal testing machine as described in claim 3, characterized in that, The step of evaluating the application adaptability of the test workpiece based on a preset fatigue application adaptability table and trigonometric function curves includes: Extract the application impulse range of the target application field from the fatigue application self-adaptation table, and identify the application scale range corresponding to the application impulse range based on the impulse horizontal axis. Identify the matching impulse arc corresponding to the target application area in the application scale interval; Extract the workpiece impulse arc corresponding to the application scale interval from the trigonometric function curve; Calculate the area enclosed by the adaptive impulse arc and the workpiece impulse arc, and evaluate the application suitability of the test workpiece based on the area enclosed by the arc.

5. An automatic fatigue testing system for a horizontal electronic universal testing machine, the testing system being used in the testing method described in any one of claims 1-4, characterized in that, The system includes: The fatigue life set calculation module is used to extract the initial impact impulse sequentially from the pre-constructed initial impact impulse sequence, wherein the difference between adjacent initial impact impulses in the initial impact impulse sequence is the initial impulse gradient; based on the initial impact impulse, the pre-constructed test workpiece is subjected to impact testing using a pre-constructed horizontal electronic universal testing machine to obtain the fatigue life set. The fatigue life dispersion calculation module is used to calculate the fatigue life dispersion based on the fatigue life set. The initial impact impulse sequence update module is used to determine whether the fatigue life dispersion meets the preset dispersion standard; if the fatigue life dispersion does not meet the dispersion standard, the iterative test density of the initial impact impulse is calculated based on the fatigue life dispersion using a pre-constructed impulse density formula; the iterative impact impulse set is calculated based on the iterative test density and the initial impact impulse; the initial impact impulse sequence is updated using the iterative impact impulse set; and the process of extracting the initial impact impulse sequentially from the pre-constructed initial impact impulse sequence is returned. The application fitness assessment module is used to construct a trigonometric function curve based on the initial impact impulse sequence if the fatigue life dispersion meets the dispersion standard; and to perform application fitness assessment on the test workpiece based on a preset fatigue application fitness table and trigonometric function curve.

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