Method and system for testing sealing fatigue of rubber sealing ring

Abstract

The invention relates to the technical field of rubber sealing rings, in particular to a method and a system for testing the sealing fatigue of a rubber sealing ring. Firstly, a test sample of the rubber sealing ring is obtained; then, the test sample is firstly subjected to appearance test, and an appearance test value is obtained through an appearance detection model, so that the accuracy of the sealing fatigue test can be improved; then, performing a liquid sealing test on the sample, and inputting the sample into the liquid leakage detection model to obtain a sealing test value, so that the efficiency and the accuracy of the sealing test can be improved; and finally, performing an elastic stress test on the sealing ring sample, and obtaining a fatigue test value by obtaining appearance test values in different stress directions and at different environment temperatures, so that the accuracy of the fatigue test can be improved. According to the invention, the test result of the rubber sealing ring is obtained by comparing the test value with the threshold value, if the test value exceeds the threshold value, the sample is directly judged to be unqualified, otherwise, the next round of test is carried out until the final test result is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of rubber sealing rings, and in particular to a sealing fatigue testing method and system for a rubber sealing ring. Background Art

[0002] As an important sealing element, rubber sealing rings can be divided into O-rings, V-rings, Y-rings and YX-rings according to their shapes, and can be divided into silicone rubber sealing rings, fluorine rubber sealing rings, polytetrafluoroethylene sealing rings, metal sealing rings and other material sealing rings according to their materials.

[0003] Rubber seals are widely used in various mechanical equipment, instrumentation, pipelines, household appliances, vehicles and other transportation vehicles. They can prevent fluid media from leaking out of the sealing device, and prevent foreign matter such as dust, sand, and small particles from entering the rubber seal inside the sealing device, ensuring the normal operation and safety of the equipment.

[0004] However, rubber seals may be affected by factors such as aging and wear during long-term use, causing their sealing performance to deteriorate or even fail. Therefore, in order to ensure that their performance meets the requirements and improve the reliability and durability of the equipment, it is very important to perform sealing fatigue tests on rubber seals.

[0005] The existing sealing fatigue test for rubber sealing rings still has certain defects. For example, the Chinese patent with patent publication number CN115356204B proposes a vision-based sealing ring testing device and testing method. The patent can adjust the relative distance between the two pull rods by turning the nut to push the square rod to move inside the square groove, so that the entire detection structure can limit the sealing rings of different diameters; the distance between the two pressure plates is adjusted by using the slip ring, thereby adjusting the distance between the first pull plate and the second pull plate, so as to facilitate the tensile test of sealing rings of different diameters.

[0006] However, the prior art only considers the dimensional adaptability of the sealing ring test and the unidirectionality of the stress test when performing stress testing. Manual testing is inefficient and the factors considered are not comprehensive during the sealing ring testing process, which reduces the efficiency and accuracy of the rubber sealing ring sealing fatigue test.

[0007] Therefore, a rubber sealing ring sealing fatigue testing method and system are proposed. Summary of the invention

[0008] The purpose of the present invention is to provide a method and system for testing the sealing fatigue of a rubber sealing ring. First, a test sample of a rubber sealing ring is obtained; then, the test sample is subjected to an appearance test, and an appearance test value is obtained through an appearance detection model, so that the accuracy of the sealing fatigue test can be improved; then, a liquid sealing test is performed on the sample, and the test value is input into a leakage detection model to obtain a sealing test value, so that the efficiency and accuracy of the sealing test can be improved; finally, an elastic stress test is performed on the sealing ring sample, and a fatigue test value is obtained by obtaining appearance test values ​​under different stress directions and ambient temperatures, so that the accuracy of the fatigue test can be improved; the present invention obtains the test result of the rubber sealing ring by comparing the test value with a threshold value. If the threshold value is exceeded, the sample is directly judged to be unqualified, otherwise the next round of testing is performed until the final test result is obtained.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A method for testing the sealing fatigue of a rubber sealing ring, comprising:

[0011] Obtaining a first test sample of the rubber seal;

[0012] Inputting the first test sample image into the appearance detection model to obtain the appearance features of the sealing ring;

[0013] Perform comprehensive evaluation and calculation based on the appearance features to obtain an appearance test value; compare the appearance test value with an appearance test threshold, and if it exceeds the appearance test threshold, judge it as an unqualified sample, otherwise mark it as a second test sample;

[0014] performing a liquid sealing test on the second test sample to obtain a liquid sealing sample;

[0015] Gray-scale and denoising are performed on the liquid sealing sample image to obtain a gray-scale sample image;

[0016] The grayscale sample image is input into the leakage detection model to obtain the leakage characteristics of the sealing ring, and the sealing test value is calculated according to the leakage characteristics and the difference in the size information of the previous and next samples; the sealing test value is compared with the sealing test threshold, and if it exceeds the sealing test threshold, it is judged as an unqualified sample, otherwise it is marked as the third test sample;

[0017] Perform an elastic stress test on the third test sample to obtain a first stress appearance test value, a second stress appearance test value, and a third stress appearance test value; obtain a fatigue test value according to the first stress appearance test value, the second stress appearance test value, and the third stress appearance test value; compare the fatigue test value with a fatigue test threshold value, and if the value exceeds the fatigue test threshold value, judge it as an unqualified sample, otherwise it is a qualified sample.

[0018] Further, obtaining a first test sample of the rubber sealing ring;

[0019] Further, the first test sample image is input into the appearance detection model to obtain the appearance features of the sealing ring;

[0020] Further, a comprehensive evaluation calculation is performed according to the appearance features to obtain an appearance test value; the appearance test value is compared with an appearance test threshold, and if it exceeds the appearance test threshold, the first test sample is judged to be unqualified, otherwise it is marked as a second test sample; wherein the specific implementation process of the appearance test value includes:

[0021] Inputting the first test sample into the appearance detection model to obtain the appearance features of the sealing ring; the appearance features include: size features, color features, hole features and crack features;

[0022] The appearance detection model is a pre-trained model; the size feature includes the inner diameter, outer diameter and thickness of the rubber sealing ring; the color feature includes the color uniformity of the rubber sealing ring; the hole feature includes the hole area and the maximum hole depth; the crack feature includes the maximum length and maximum width of the crack;

[0023] Further, each feature in the output of the appearance detection model is evaluated to obtain a plurality of evaluation scores;

[0024] Furthermore, a comprehensive score is performed based on the multiple evaluation scores to obtain the appearance test value; wherein the calculation formula of the appearance test value is:

[0025]

[0026] Wherein, WGCS represents the appearance test value; M represents the number of the first test samples; α1 represents the size characteristic coefficient; cc i It is represented by the size test value of the i-th sample; α2 is represented by the color characteristic coefficient; ys i It is represented as the color uniformity of the i-th sample; α3 is represented as the pit feature coefficient; kd i It is represented as the number of holes in the i-th sample; It is expressed as the area of ​​the j1th hole of the i-th sample; is the maximum depth of the j1th hole of the i-th sample; α4 is the crack characteristic coefficient; lw i It is expressed as the number of cracks in the i-th sample; It is expressed as the maximum length of the j2nd crack of the i-th sample; It is expressed as the maximum width of the j2nd crack of the i-th sample;

[0027] The calculation formula of the size test value is:

[0028]

[0029] Among them, cc i It is represented as the size test value of the i-th sample; wj i Represented as the outer diameter of the i-th sample; wj th Represents the set outer diameter threshold; nj i It is represented as the inner diameter of the i-th sample; nj th Indicates the set inner diameter threshold; hd i Denoted as the thickness of the i-th sample; hd th It represents the set thickness threshold; β1 represents the outer diameter coefficient; β2 represents the inner diameter coefficient; β3 represents the thickness coefficient.

[0030] Further, performing a liquid sealing test on the second test sample to obtain a liquid sealing sample;

[0031] Further, grayscale and denoising processing is performed on the liquid sealing sample to obtain a grayscale sample image;

[0032] Furthermore, the grayscale sample image is input into the leakage detection model to obtain the leakage characteristics of the sealing ring, and the sealing test value is calculated according to the leakage characteristics and the difference in size information of the front and rear samples; the sealing test value is compared with the sealing test threshold, and if it exceeds the sealing test threshold, the second test sample is judged to be unqualified, otherwise it is marked as the third test sample; wherein the specific implementation process of the sealing test value includes:

[0033] Inputting the grayscale sample image into the leakage detection model to obtain the leakage characteristics of the sealing ring; wherein the leakage characteristics include the leakage rate and the leakage area;

[0034] Further, the dimension information of the second test sample and the liquid sealing sample is obtained through the appearance detection model to obtain a dimension difference test value; wherein the dimension information includes: inner diameter, outer diameter, thickness and weight of the sample;

[0035] Further, evaluating the leakage rate and the leakage area in the leakage characteristics to obtain a leakage difference test value;

[0036] Furthermore, the size difference test value and the leakage difference test value are weightedly summed to obtain the sealing test value; wherein the calculation formula of the sealing test value is:

[0037] MFCS = λ*ccs+(1-λ)*lcs;

[0038]

[0039]

[0040] Wherein, MFCS represents the sealing test value; λ represents the weight of the sealing test value; ccs represents the size difference test value; lcs represents the leakage difference test value; N represents the number of the second test samples; ω i Represented as the test coefficient of the i-th size information; tcc (i,j) Represents the i-th test size information of the j-th sample; icc (i,j) It is represented as the i-th initial size information of the j-th sample; μ1 is represented as the test coefficient of the leakage rate; ρ j Expressed as the leakage rate of the jth sample; ρ th It is represented by the set leakage rate threshold; μ2 is represented by the test coefficient of the leakage area; mj j It is expressed as the leakage area of ​​the jth sample; mj th It is expressed as the set leakage area threshold.

[0041] Further, an elastic stress test is performed on the third test sample to obtain a first stress appearance test value, a second stress appearance test value and a third stress appearance test value; wherein the specific implementation process of the elastic stress test includes:

[0042] Set K stretching directions, K extrusion directions, P stretching degrees and P extrusion degrees; and set L elastic test temperatures;

[0043] Further, the third test sample is divided into L elastic test sets; each elastic test set corresponds to an elastic test temperature; each elastic test set is subjected to a tensile test and an extrusion test;

[0044] Further, each of the elastic test sets is input into the appearance detection model to obtain the first stress appearance feature, and the first stress appearance test value of each of the elastic test sets is obtained by referring to the calculation formula of the appearance test value;

[0045] Further, a tensile test is performed on each sample in the elastic test set, and the samples are stretched at different stretching degrees along each stretching direction at the corresponding elastic test temperature; after stretching at time t1, the tensile force is removed, and the sample set after the tensile test is input into the appearance detection model to obtain the second stress appearance feature of the sample set, and obtain the second stress appearance test value;

[0046] Further, an extrusion test is performed on each sample in the elastic test set, and extrusion is performed along each extrusion direction at a corresponding elastic test temperature with different extrusion degrees; after the extrusion time t2, the pressure is canceled, and the sample set after the extrusion test is input into the appearance detection model to obtain the third stress appearance feature of the sample set, and obtain the third stress appearance test value;

[0047] Further, a fatigue test value is obtained according to the first stress appearance test value, the second stress appearance test value and the third stress appearance test value; the fatigue test value is compared with a fatigue test threshold, and if the fatigue test threshold is exceeded, the third test sample is judged to be unqualified, otherwise it is qualified.

[0048] The calculation formula of the fatigue test value is:

[0049]

[0050] Wherein, YLCS represents the fatigue test value; L represents the number of elastic test sets divided by the third test sample; acc (1,i) It is represented as the first appearance test value of the i-th elastic test set; acc (2,i) represents the second appearance test value obtained after the tensile test of the i-th elastic test set; acc (3,i) It represents the third appearance test value obtained after the extrusion test of the i-th elastic test set; σ1 represents the tensile test coefficient; σ2 represents the extrusion test coefficient.

[0051] A rubber sealing ring sealing fatigue test system comprises: a system control module, a test input module, a first test module, a second test module, a third test module and a test output module; wherein the system control module is used to control the start, pause and stop of the system; the test input module is used to obtain a test sample of the rubber sealing ring; the first test module is used to perform an appearance test on the obtained test sample to obtain an appearance test value and obtain a first output result; the second test module is used to perform a liquid sealing test on the first output result to obtain a sealing test value and obtain a second output result; the third test module is used to perform an elastic stress test on the second output result to obtain a fatigue test value and obtain a third output result; the test output module is used to obtain a final test result according to the test conditions of the first output result, the second output result and the third output result and display and output the final test result.

[0052] The calculation formula for obtaining the appearance test value by the first test module is:

[0053]

[0054] Wherein, WGCS represents the appearance test value; M represents the number of the first test samples; α1 represents the size characteristic coefficient; cc i It is represented by the size test value of the i-th sample; α2 is represented by the color characteristic coefficient; ys i It is represented by the color uniformity of the i-th sample; α3 is represented by the pothole characteristic coefficient; kd i It is represented as the number of holes in the i-th sample; It is expressed as the area of ​​the j1th hole of the i-th sample; is the maximum depth of the j1th hole of the i-th sample; α4 is the crack characteristic coefficient; lw i It is expressed as the number of cracks in the i-th sample; It is expressed as the maximum length of the j2nd crack of the i-th sample; It is expressed as the maximum width of the j2nd crack of the i-th sample;

[0055] The calculation formula of the size test value is:

[0056]

[0057] Among them, cc i It is represented as the size test value of the i-th sample; wj i Represented as the outer diameter of the i-th sample; wj th Represents the set outer diameter threshold; nj i Represented as the inner diameter of the i-th sample; nj th Indicates the set inner diameter threshold; hd i Expressed as the thickness of the i-th sample; hd th It represents the set thickness threshold; β1 represents the outer diameter coefficient; β2 represents the inner diameter coefficient; β3 represents the thickness coefficient.

[0058] The calculation formula for the second test module to obtain the sealing test value is:

[0059] MFCS = λ*ccs+(1-λ)*lcs;

[0060]

[0061] Wherein, MFCS represents the sealing test value; λ represents the weight of the sealing test value; ccs represents the size difference test value; lcs represents the leakage difference test value; N represents the number of the second test samples; ω i Represented as the test coefficient of the i-th size information; tcc (i,j) Represents the i-th test size information of the j-th sample; icc (i,j)It is represented as the i-th initial size information of the j-th sample; μ1 is represented as the test coefficient of the leakage rate; ρ j Expressed as the leakage rate of the jth sample; ρ th It is expressed as the set leakage rate threshold; μ2 is expressed as the test coefficient of the leakage area; mj j Expressed as the leakage area of ​​the jth sample; mj th It is expressed as the set leakage area threshold.

[0062] The specific implementation process of the elastic stress test includes:

[0063] Set K stretching directions, K extrusion directions, P stretching degrees and P extrusion degrees; and set L elastic test temperatures;

[0064] Further, the third test sample is divided into L elastic test sets; each elastic test set corresponds to an elastic test temperature; each elastic test set is subjected to a tensile test and an extrusion test;

[0065] Further, each of the elastic test sets is input into the appearance detection model to obtain the first stress appearance feature, and the first stress appearance test value of each of the elastic test sets is obtained by referring to the calculation formula of the appearance test value;

[0066] Further, a tensile test is performed on each sample in the elastic test set, and the samples are stretched at different stretching degrees along each stretching direction at the corresponding elastic test temperature; after stretching at time t1, the tensile force is removed, and the sample set after the tensile test is input into the appearance detection model to obtain the second stress appearance feature of the sample set, and obtain the second stress appearance test value;

[0067] Further, an extrusion test is performed on each sample in the elastic test set, and extrusion is performed along each extrusion direction at a corresponding elastic test temperature with different extrusion degrees; after the extrusion time t2, the pressure is canceled, and the sample set after the extrusion test is input into the appearance detection model to obtain the third stress appearance feature of the sample set, and obtain the third stress appearance test value;

[0068] Further, a fatigue test value is obtained according to the first stress appearance test value, the second stress appearance test value and the third stress appearance test value; the fatigue test value is compared with a fatigue test threshold, and if the fatigue test threshold is exceeded, the third test sample is judged to be unqualified, otherwise it is qualified.

[0069] The calculation formula for the third test module to obtain the fatigue test value is:

[0070]

[0071] Wherein, YLCS represents the fatigue test value; L represents the number of elastic test sets divided by the third test sample; acc (1,i) It is represented as the first stress appearance test value of the i-th elastic test set; acc (2,i) represents the second stress appearance test value obtained after the tensile test of the i-th elastic test set; acc (3,i) It represents the third stress appearance test value obtained after the extrusion test of the i-th elastic test set; σ1 represents the tensile test coefficient; σ2 represents the extrusion test coefficient.

[0072] Compared with the prior art, the present invention has the following beneficial effects:

[0073] 1. The present invention proposes an appearance test function for testing the appearance quality of a rubber sealing ring; this function obtains appearance features by inputting a test sample of the sealing ring into an appearance detection model; a comprehensive evaluation is performed based on the size features, color features, hole features and crack features in the appearance features to obtain an appearance test value; this function can perform an initial screening of the samples to exclude products with unqualified appearance quality, thereby improving the efficiency and accuracy of the seal fatigue test.

[0074] 2. The present invention proposes a sealing test function for testing the sealing performance of a rubber sealing ring; this function obtains a leakage feature by inputting a grayscale image of a sample that has passed the appearance test into a leakage detection model; an evaluation is performed based on the leakage rate and in the leakage feature to obtain a leakage difference test value; at the same time, the appearance detection model is used to obtain the size information of the sample before and after the sealing test to obtain a size difference test value; a sealing test value is obtained based on the leakage difference test value and the size difference test value; this function uses the difference between the sealing ring features to test the sealing performance, thereby improving the efficiency and accuracy of the sealing fatigue test.

[0075] 3. The present invention proposes an elastic stress testing method for testing the fatigue performance of a sealing ring; this method divides the samples that have passed the sealing test into sample sets according to the number of test temperatures, performs stress tests on each sample set according to different set stress directions and different stress degrees, and then inputs them into the appearance detection model to obtain fatigue test values ​​through comprehensive calculation; this testing method performs fatigue tests on the sealing ring with reference to temperature, stress direction and stress degree, and comprehensively judges the fatigue performance of the sealing ring in combination with appearance feature detection, which can improve the efficiency and accuracy of sealing fatigue testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 It is a schematic flow chart of a method for testing the sealing fatigue of a rubber sealing ring of the present invention;

[0077] Figure 2 is a schematic diagram of a rubber sealing ring sample of the present invention;

[0078] Figure 3 It is a schematic diagram of the process of elastic stress testing of the present invention;

[0079] Figure 4 It is a structural schematic diagram of a rubber sealing ring sealing fatigue testing system of the present invention. DETAILED DESCRIPTION

[0080] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0081] Rubber seals are widely used in various mechanical equipment, instrumentation, pipelines, household appliances, vehicles and other transportation vehicles. They can prevent fluid media from leaking out of the sealing device, and prevent foreign matter such as dust, sand, and small particles from entering the rubber seal inside the sealing device, ensuring the normal operation and safety of the equipment.

[0082] However, rubber seals may be affected by factors such as aging and wear during long-term use, causing their sealing performance to deteriorate or even fail. Therefore, in order to ensure that their performance meets the requirements and improve the reliability and durability of the equipment, it is very important to perform sealing fatigue tests on rubber seals.

[0083] However, the prior art only considers the dimensional adaptability of the sealing ring test and the unidirectionality of the stress test when performing stress testing. The deep learning method is not combined in the sealing ring testing process and the factors considered are not comprehensive, which will reduce the efficiency and accuracy of the rubber sealing ring sealing fatigue test. To this end, the present invention proposes a rubber sealing ring sealing fatigue test method and system. The following will provide a specific description from two embodiments.

[0084] Embodiment 1

[0085] In the embodiment of the present application, the specific implementation process is implemented by a rubber sealing ring sealing fatigue test method, see Figure 1 The process of the method proposed in this embodiment is described in the following; the rubber sealing ring sealing fatigue testing method comprises:

[0086] S10. Obtain a first test sample of the rubber sealing ring;

[0087] S20. Inputting the first test sample image into the appearance detection model, and evaluating the appearance features to obtain an appearance test value;

[0088] S30. Compare the appearance test value with the appearance test threshold. If it exceeds the appearance test threshold, it is judged as an unqualified sample, otherwise it is marked as a second test sample;

[0089] S40. Performing a liquid sealing test and preprocessing on the second test sample to obtain a grayscale sample image;

[0090] S50. Inputting the grayscale sample image into the leakage detection model, and performing a comprehensive evaluation based on the leakage characteristics and size information to obtain a sealing test value;

[0091] S60. Compare the sealing test value with the sealing test threshold value. If the sealing test value exceeds the sealing test threshold value, the sample is judged as an unqualified sample. Otherwise, the sample is marked as a third test sample.

[0092] S70. Perform an elastic stress test on the third test sample, and perform a comprehensive evaluation based on the appearance test value to obtain a fatigue test value;

[0093] S80. Compare the fatigue test value with the fatigue test threshold. If the value exceeds the fatigue test threshold, it is judged as an unqualified sample; otherwise, it is a qualified sample.

[0094] Furthermore, a specific implementation process of a rubber sealing ring sealing fatigue test method is as follows:

[0095] Obtaining a first test sample of the rubber seal;

[0096] Inputting the first test sample image into the appearance detection model to obtain the appearance features of the sealing ring;

[0097] Perform comprehensive evaluation and calculation based on the appearance features to obtain an appearance test value; compare the appearance test value with an appearance test threshold, and if it exceeds the appearance test threshold, judge it as an unqualified sample, otherwise mark it as a second test sample;

[0098] performing a liquid sealing test on the second test sample to obtain a liquid sealing sample;

[0099] Gray-scale and denoising are performed on the liquid sealing sample image to obtain a gray-scale sample image;

[0100] The grayscale sample image is input into the leakage detection model to obtain the leakage characteristics of the sealing ring, and the sealing test value is calculated according to the leakage characteristics and the difference in the size information of the previous and next samples; the sealing test value is compared with the sealing test threshold, and if it exceeds the sealing test threshold, it is judged as an unqualified sample, otherwise it is marked as the third test sample;

[0101] Perform an elastic stress test on the third test sample to obtain a first stress appearance test value, a second stress appearance test value, and a third stress appearance test value; obtain a fatigue test value according to the first stress appearance test value, the second stress appearance test value, and the third stress appearance test value; compare the fatigue test value with a fatigue test threshold value, and if the value exceeds the fatigue test threshold value, judge it as an unqualified sample, otherwise it is a qualified sample.

[0102] In this example, a method for testing the sealing fatigue of a rubber sealing ring is proposed. First, a test sample of the rubber sealing ring is obtained. The image of the test sample can be referred to as Figure 2 ; Then, the test sample is first subjected to an appearance test, and the appearance test value is obtained through the appearance detection model, so as to improve the accuracy of the sealing fatigue test; then, a liquid sealing test is performed on the sample, and the test result is input into the leakage detection model to obtain the sealing test value, so as to improve the efficiency and accuracy of the sealing test; finally, an elastic stress test is performed on the sealing ring sample, and the fatigue test value is obtained by obtaining the appearance test values ​​under different stress directions and ambient temperatures, so as to improve the accuracy of the fatigue test.

[0103] For the purpose of specific explanation, the following embodiments are described as follows:

[0104] Obtaining a first test sample of the rubber seal;

[0105] Further, the first test sample image is input into the appearance detection model to obtain the appearance features of the sealing ring;

[0106] In this example, the first test sample image is taken by a high-resolution camera; if a low-resolution camera is used to capture the image, the acquired image needs to be denoised and enhanced; the appearance detection model adopts the yolov7 model, which is a parameterized model obtained after a large amount of appearance information annotation and a long training process.

[0107] Further, a comprehensive evaluation calculation is performed according to the appearance features to obtain an appearance test value; the appearance test value is compared with an appearance test threshold, and if it exceeds the appearance test threshold, it is judged as an unqualified sample, otherwise it is marked as a second test sample; wherein the appearance test threshold can be set according to actual conditions, and is set to 0.9 in this embodiment;

[0108] The specific implementation process of the appearance test value includes:

[0109] Inputting the first test sample into the appearance detection model to obtain the appearance features of the sealing ring; the appearance features include: size features, color features, hole features and crack features;

[0110] The size characteristics include the inner diameter, outer diameter and thickness of the rubber sealing ring; the color characteristics include the color uniformity of the rubber sealing ring; the hole characteristics include the hole area and the maximum hole depth; the crack characteristics include the maximum length and maximum width of the crack;

[0111] Further, each feature in the output of the appearance detection model is evaluated to obtain a plurality of evaluation scores;

[0112] Furthermore, a comprehensive score is performed based on the multiple evaluation scores to obtain the appearance test value; wherein the calculation formula of the appearance test value is:

[0113]

[0114] Wherein, WGCS represents the appearance test value; M represents the number of the first test samples; α1 represents the size characteristic coefficient; cc i It is represented by the size test value of the i-th sample; α2 is represented by the color characteristic coefficient; ys i It is represented as the color uniformity of the i-th sample; α3 is represented as the pit feature coefficient; kd i It is represented as the number of holes in the i-th sample; It is expressed as the area of ​​the j1th hole of the i-th sample; is the maximum depth of the j1th hole of the i-th sample; α4 is the crack characteristic coefficient; lw i It is expressed as the number of cracks in the i-th sample; It is expressed as the maximum length of the j2nd crack of the i-th sample; It is expressed as the maximum width of the j2nd crack of the i-th sample;

[0115] The calculation formula of the size test value is:

[0116]

[0117] Among them, cc i It is represented as the size test value of the i-th sample; wj i Represented as the outer diameter of the i-th sample; wj th Represents the set outer diameter threshold; nj i It is represented as the inner diameter of the i-th sample; nj th Indicates the set inner diameter threshold; hd i Denotes the thickness of the i-th sample; hd th It represents the set thickness threshold; β1 represents the outer diameter coefficient; β2 represents the inner diameter coefficient; β3 represents the thickness coefficient.

[0118] In this example, an appearance test function is proposed to test the appearance quality of a rubber sealing ring; this function obtains appearance features by inputting a test sample of the sealing ring into an appearance detection model; a comprehensive evaluation is performed based on the size features, color features, hole features, and crack features in the appearance features to obtain an appearance test value; this function can perform an initial screening of the samples to exclude products with unqualified appearance quality, thereby improving the efficiency and accuracy of the seal fatigue test.

[0119] Further, performing a liquid sealing test on the second test sample to obtain a liquid sealing sample;

[0120] The liquid sealing test in this example immerses the second test sample in a set liquid, takes out the sealing ring sample after immersion for T time and cleans the residual liquid on the surface; continues to immerse for T time after cleaning; after repeating the immersion-cleaning process N times, the liquid sealing sample is obtained; wherein the liquid used in this example is water.

[0121] Further, the liquid sealing sample image is grayed and denoised to obtain a grayscale sample image;

[0122] The grayscale method in this example adopts the maximum value method, that is, the ratio between each pixel value and the maximum pixel value in the image; the denoising method uses a two-dimensional Gaussian function to perform Gaussian denoising on the image.

[0123] Furthermore, the grayscale sample image is input into the leakage detection model to obtain the leakage characteristics of the sealing ring, and the sealing test value is calculated according to the leakage characteristics and the difference in the size information of the front and rear samples; the sealing test value is compared with the sealing test threshold, and if it exceeds the sealing test threshold, it is judged as an unqualified sample, otherwise it is marked as the third test sample;

[0124] The leakage detection model in this example is a convolutional neural network similar to UNet; wherein, the bottleneck layer of the convolutional neural network adds channel attention and spatial attention to improve the model's ability to extract leakage features; the model is also a parameter model that can be directly used after the training step.

[0125] The specific implementation process of the sealing test value includes:

[0126] Inputting the grayscale sample image into the leakage detection model to obtain the leakage characteristics of the sealing ring; wherein the leakage characteristics include the leakage rate and the leakage area;

[0127] Further, the dimension information of the second test sample and the liquid sealing sample is obtained through the appearance detection model to obtain a dimension difference test value; wherein the dimension information includes: inner diameter, outer diameter, thickness and weight of the sample;

[0128] Further, evaluating the leakage rate and the leakage area in the leakage characteristics to obtain a leakage difference test value;

[0129] Furthermore, the size difference test value and the leakage difference test value are weightedly summed to obtain the sealing test value; wherein the calculation formula of the sealing test value is:

[0130] MFCS = λ*ccs+(1-λ)*lcs;

[0131]

[0132] Wherein, MFCS represents the sealing test value; λ represents the weight of the sealing test value; ccs represents the size difference test value; lcs represents the leakage difference test value; N represents the number of the second test samples; ω i Represented as the test coefficient of the i-th size information; tcc (i,j) Represents the i-th test size information of the j-th sample; icc (i,j) It is represented as the i-th initial size information of the j-th sample; μ1 is represented as the test coefficient of the leakage rate; ρ j Expressed as the leakage rate of the jth sample; ρ th It is represented by the set leakage rate threshold; μ2 is represented by the test coefficient of the leakage area; mj j It is expressed as the leakage area of ​​the jth sample; mj th It is expressed as the set leakage area threshold.

[0133] This example proposes a sealing test function for testing the sealing performance of a rubber sealing ring; this function obtains a leakage feature by inputting a grayscale image of a sample that has passed the appearance test into a leakage detection model; an evaluation is performed based on the leakage rate and in the leakage feature to obtain a leakage difference test value; at the same time, the appearance detection model is used to obtain the size information of the sample before and after the sealing test to obtain a size difference test value; a sealing test value is obtained based on the leakage difference test value and the size difference test value; this function uses the difference between the sealing ring features to test the sealing performance, which can improve the efficiency and accuracy of the sealing fatigue test.

[0134] Further, an elastic stress test is performed on the third test sample to obtain a first stress appearance test value, a second stress appearance test value and a third stress appearance test value;

[0135] The specific implementation process of the elastic stress test can be referred to Figure 3 ,include:

[0136] Set K stretching directions, K extrusion directions, P stretching degrees and P extrusion degrees; and set L elastic test temperatures;

[0137] In this embodiment, the number of stress directions K, stress levels P and temperatures L are set to 8, 6 and 6 respectively; in this embodiment, the circular sealing ring is used as a reference, and a coordinate system is constructed with the center of the rubber sealing ring as the origin. The 8 stress directions can be represented by the angles of the coordinate system as: 0°, 45°, 90°, 135°, 180°, 225°, 270° and 315°; the 6 stress levels can be represented by the distance from the origin in each angular direction of the coordinate system as: i-3p, i-2p, ip, i+p, i+2p and i+3p; wherein i represents the radius of the sealing ring, and p represents the stress level value, which can be set as required; in this embodiment, the 6 test temperatures are set to -40°C, -20°C, 0°C, 25°C, 50°C and 80°C.

[0138] Further, the third test sample is divided into L elastic test sets; each elastic test set corresponds to an elastic test temperature; each elastic test set is subjected to a tensile test and an extrusion test;

[0139] Further, each of the elastic test sets is input into the appearance detection model to obtain the first stress appearance feature, and the first stress appearance test value of each of the elastic test sets is obtained by referring to the calculation formula of the appearance test value;

[0140] Further, a tensile test is performed on each sample in the elastic test set, and the samples are stretched at different stretching degrees along each stretching direction at the corresponding elastic test temperature; after stretching at time t1, the tensile force is removed, and the sample set after the tensile test is input into the appearance detection model to obtain the second stress appearance feature of the sample set, and obtain the second stress appearance test value;

[0141] Further, an extrusion test is performed on each sample in the elastic test set, and extrusion is performed along each extrusion direction at a corresponding elastic test temperature with different extrusion degrees; after the extrusion time t2, the pressure is canceled, and the sample set after the extrusion test is input into the appearance detection model to obtain the third stress appearance feature of the sample set, and obtain the third stress appearance test value;

[0142] Furthermore, a fatigue test value is obtained according to the first stress appearance test value, the second stress appearance test value and the third stress appearance test value; the fatigue test value is compared with a fatigue test threshold, and if it exceeds the fatigue test threshold, it is judged as an unqualified sample, otherwise it is a qualified sample.

[0143] The calculation formula of the fatigue test value is:

[0144]

[0145] Wherein, YLCS represents the fatigue test value; L represents the number of elastic test sets divided by the third test sample; acc (1,i) It is represented as the first appearance test value of the i-th elastic test set; acc (2,i) represents the second appearance test value obtained after the tensile test of the i-th elastic test set; acc (3,i) It represents the third appearance test value obtained after the extrusion test of the i-th elastic test set; σ1 represents the tensile test coefficient; σ2 represents the extrusion test coefficient.

[0146] This example proposes an elastic stress test method for testing the fatigue performance of the sealing ring; this method divides the samples that have passed the sealing test into sample sets according to the number of test temperatures, performs stress tests on each sample set according to different set stress directions and different stress degrees, and then inputs them into the appearance detection model to obtain the fatigue test values ​​through comprehensive calculation; this test method performs fatigue tests on the sealing ring with reference to temperature, stress direction and stress degree, and comprehensively judges the fatigue performance of the sealing ring by combining appearance feature detection, which can improve the efficiency and accuracy of the sealing fatigue test.

[0147] The fatigue test value in this example is calculated based on the first stress appearance test value, the second stress appearance test value and the third stress appearance test value; the stress appearance test value is calculated by inputting sample images under different stress test conditions into the appearance detection model. This test value comprehensively considers the deformation degree and tolerance of the rubber sealing ring sample under different temperatures, directions and applied values, thereby further improving the accuracy of the sealing fatigue test.

[0148] Embodiment 2

[0149] As an embodiment of the present invention, refer to Figure 4 , a rubber sealing ring sealing fatigue test system, comprising: a system control module, a test input module, a first test module, a second test module, a third test module and a test output module;

[0150] Wherein, the system control module is used to control the start, pause and stop of the system;

[0151] The test input module is used to obtain a test sample of the rubber sealing ring;

[0152] The first testing module is used to perform an appearance test on the acquired test sample to obtain an appearance test value and obtain a first output result;

[0153] The second test module is used to perform a liquid sealing test on the first output result to obtain a sealing test value, thereby obtaining a second output result;

[0154] The third testing module is used to perform an elastic stress test on the second output result to obtain a fatigue test value, thereby obtaining a third output result;

[0155] The test output module is used to obtain a final test result according to the test conditions of the first output result, the second output result and the third output result, and to display and output the final test result.

[0156] The calculation formula for obtaining the appearance test value by the first test module is:

[0157]

[0158] Wherein, WGCS represents the appearance test value; M represents the number of the first test samples; α1 represents the size characteristic coefficient; cc i It is represented by the size test value of the i-th sample; α2 is represented by the color characteristic coefficient; ys i It is represented by the color uniformity of the i-th sample; α3 is represented by the pothole characteristic coefficient; kd i It is represented as the number of holes in the i-th sample; It is expressed as the area of ​​the j1th hole of the i-th sample; is the maximum depth of the j1th hole of the i-th sample; α4 is the crack characteristic coefficient; lw i It is expressed as the number of cracks in the i-th sample; It is expressed as the maximum length of the j2nd crack of the i-th sample; It is expressed as the maximum width of the j2nd crack of the i-th sample;

[0159] The calculation formula of the size test value is:

[0160]

[0161] Among them, cc i It is represented as the size test value of the i-th sample; wj i Represented as the outer diameter of the i-th sample; wj th Represents the set outer diameter threshold; nji Represented as the inner diameter of the i-th sample; nj th Indicates the set inner diameter threshold; hd i Expressed as the thickness of the i-th sample; hd th It represents the set thickness threshold; β1 represents the outer diameter coefficient; β2 represents the inner diameter coefficient; β3 represents the thickness coefficient.

[0162] The calculation formula for the second test module to obtain the sealing test value is:

[0163] MFCS = λ*ccs+(1-λ)*lcs;

[0164]

[0165] Wherein, MFCS represents the sealing test value; λ represents the weight of the sealing test value; ccs represents the size difference test value; lcs represents the leakage difference test value; N represents the number of the second test samples; ω i Represented as the test coefficient of the i-th size information; tcc (i,j) Represents the i-th test size information of the j-th sample; icc (i,j) It is represented as the i-th initial size information of the j-th sample; μ1 is represented as the test coefficient of the leakage rate; ρ j Expressed as the leakage rate of the jth sample; ρ th It is expressed as the set leakage rate threshold; μ2 is expressed as the test coefficient of the leakage area; mj j Expressed as the leakage area of ​​the jth sample; mj th It is expressed as the set leakage area threshold.

[0166] The specific implementation process of the elastic stress test includes:

[0167] Set K stretching directions, K extrusion directions, P stretching degrees and P extrusion degrees; and set L elastic test temperatures;

[0168] Further, the third test sample is divided into L elastic test sets; each elastic test set corresponds to an elastic test temperature; each elastic test set is subjected to a tensile test and an extrusion test;

[0169] Further, each of the elastic test sets is input into the appearance detection model to obtain the first stress appearance feature, and the first stress appearance test value of each of the elastic test sets is obtained by referring to the calculation formula of the appearance test value;

[0170] Further, a tensile test is performed on each sample in the elastic test set, and the samples are stretched at different stretching degrees along each stretching direction at the corresponding elastic test temperature; after stretching at time t1, the tensile force is removed, and the sample set after the tensile test is input into the appearance detection model to obtain the second stress appearance feature of the sample set, and obtain the second stress appearance test value;

[0171] Further, an extrusion test is performed on each sample in the elastic test set, and extrusion is performed along each extrusion direction at a corresponding elastic test temperature with different extrusion degrees; after the extrusion time t2, the pressure is canceled, and the sample set after the extrusion test is input into the appearance detection model to obtain the third stress appearance feature of the sample set, and obtain the third stress appearance test value;

[0172] Further, a fatigue test value is obtained according to the first stress appearance test value, the second stress appearance test value and the third stress appearance test value; the fatigue test value is compared with a fatigue test threshold, and if the fatigue test threshold is exceeded, the third test sample is judged to be unqualified, otherwise it is qualified.

[0173] The calculation formula for the third test module to obtain the fatigue test value is:

[0174]

[0175] Wherein, YLCS represents the fatigue test value; L represents the number of elastic test sets divided by the third test sample; acc (1,i) It is represented as the first stress appearance test value of the i-th elastic test set; acc (2,i) represents the second stress appearance test value obtained after the tensile test of the i-th elastic test set; acc (3,i) It represents the third stress appearance test value obtained after the extrusion test of the i-th elastic test set; σ1 represents the tensile test coefficient; σ2 represents the extrusion test coefficient.

[0176] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for testing the sealing fatigue of a rubber sealing ring, characterized in that: include: Obtaining a first test sample of the rubber seal; Inputting the first test sample image into the appearance detection model to obtain the appearance features of the sealing ring; Perform comprehensive evaluation and calculation based on the appearance features to obtain an appearance test value; compare the appearance test value with an appearance test threshold, and if it exceeds the appearance test threshold, judge it as an unqualified sample, otherwise mark it as a second test sample; performing a liquid sealing test on the second test sample to obtain a liquid sealing sample; Gray-scale and denoising are performed on the liquid sealing sample image to obtain a gray-scale sample image; The grayscale sample image is input into the leakage detection model to obtain the leakage characteristics of the sealing ring, and the sealing test value is calculated according to the leakage characteristics and the difference in the size information of the previous and next samples; the sealing test value is compared with the sealing test threshold, and if it exceeds the sealing test threshold, it is judged as an unqualified sample, otherwise it is marked as the third test sample; Perform an elastic stress test on the third test sample to obtain a first stress appearance test value, a second stress appearance test value, and a third stress appearance test value; obtain a fatigue test value according to the first stress appearance test value, the second stress appearance test value, and the third stress appearance test value; compare the fatigue test value with a fatigue test threshold value, and if the value exceeds the fatigue test threshold value, judge it as an unqualified sample, otherwise it is a qualified sample.

2. A rubber sealing ring sealing fatigue testing method according to claim 1, characterized in that: The specific implementation process of performing comprehensive evaluation and calculation according to the appearance features to obtain the appearance test value includes: Inputting the first test sample image into the appearance detection model to obtain the appearance features of the sealing ring; wherein the appearance features include: size features, color features, hole features and crack features; The appearance detection model is a pre-trained model; the size feature includes the inner diameter, outer diameter and thickness of the rubber sealing ring; the color feature includes the color uniformity of the rubber sealing ring; the hole feature includes the hole area and the maximum hole depth; the crack feature includes the maximum length and maximum width of the crack; Evaluate each feature in the output of the appearance detection model to obtain multiple evaluation scores; The appearance test value is obtained by performing a comprehensive scoring according to the multiple evaluation scores; wherein the calculation formula of the appearance test value is: Wherein, WGCS represents the appearance test value; M represents the number of the first test samples; α1 represents the size characteristic coefficient; cc i It is represented by the size test value of the i-th sample; α2 is represented by the color characteristic coefficient; ys i It is represented as the color uniformity of the i-th sample; α3 is represented as the pit feature coefficient; kd i It is expressed as the number of holes in the i-th sample; It is expressed as the area of ​​the j1th hole of the i-th sample; is the maximum depth of the j1th hole of the i-th sample; α4 is the crack characteristic coefficient; lw i It is expressed as the number of cracks in the i-th sample; It is expressed as the maximum length of the j2nd crack of the i-th sample; It is expressed as the maximum width of the j2nd crack of the i-th sample; The calculation formula of the size test value is: Among them, cc i It is represented as the size test value of the i-th sample; wj i Represented as the outer diameter of the i-th sample; wj th Represents the set outer diameter threshold; nj i It is represented as the inner diameter of the i-th sample; nj th Indicates the set inner diameter threshold; hd i Denoted as the thickness of the i-th sample; hd th It represents the set thickness threshold; β1 represents the outer diameter coefficient; β2 represents the inner diameter coefficient; β3 represents the thickness coefficient.

3. A rubber sealing ring sealing fatigue testing method according to claim 1, characterized in that: The specific implementation process of calculating the sealing test value according to the leakage characteristics and the difference in the size information of the front and rear samples includes: Inputting the grayscale sample image into the leakage detection model to obtain the leakage characteristics of the sealing ring; wherein the leakage characteristics include the leakage rate and the leakage area; Acquire the dimension information of the second test sample and the liquid sealing sample through the appearance detection model to obtain a dimension difference test value; wherein the dimension information includes: inner diameter, outer diameter, thickness and weight of the sample; Evaluate the leakage rate and the leakage area in the leakage characteristics to obtain a leakage difference test value; The size difference test value and the leakage difference test value are weightedly summed to obtain the sealing test value; wherein the calculation formula of the sealing test value is: MFCS = λ*ccs+(1-λ)*lcs; Wherein, MFCS represents the sealing test value; λ represents the weight of the sealing test value; ccs represents the size difference test value; lcs represents the leakage difference test value; N represents the number of the second test samples; ω i Represented as the test coefficient of the i-th size information; tcc (i,j) Represents the i-th test size information of the j-th sample; icc (i,j) It is represented as the i-th initial size information of the j-th sample; μ1 is represented as the test coefficient of the leakage rate; ρ j Expressed as the leakage rate of the jth sample; ρ th It is represented by the set leakage rate threshold; μ2 is represented by the test coefficient of the leakage area; mj j It is expressed as the leakage area of ​​the jth sample; mj th It is expressed as the set leakage area threshold.

4. A rubber sealing ring sealing fatigue testing method according to claim 1, characterized in that: The specific implementation process of performing elastic stress testing on the third test sample includes: Set K stretching directions, K extrusion directions, P stretching degrees and P extrusion degrees; and set L elastic test temperatures; Divide the third test sample into L elastic test sets; each elastic test set corresponds to an elastic test temperature; each elastic test set performs a tensile test and an extrusion test; Input each of the elastic test sets into the appearance detection model to obtain a first stress appearance feature, and obtain a first stress appearance test value of each of the elastic test sets by referring to a calculation formula of the appearance test value; Performing a tensile test on each sample in the elastic test set, and stretching the sample along each stretching direction at a corresponding elastic test temperature using different stretching degrees; after stretching at time t1, canceling the tension, inputting the sample set after the tensile test into the appearance detection model, and obtaining the second stress appearance feature of the sample set, thereby obtaining a second stress appearance test value; Performing an extrusion test on each sample in the elastic test set, and extruding with different extrusion degrees along each extrusion direction at the corresponding elastic test temperature; after extrusion at time t2, canceling the pressure, inputting the sample set after the extrusion test into the appearance detection model, and obtaining the third stress appearance feature of the sample set, and obtaining the third stress appearance test value; A fatigue test value is obtained according to the first stress appearance test value, the second stress appearance test value and the third stress appearance test value; the fatigue test value is compared with a fatigue test threshold value, and if the fatigue test threshold value is exceeded, the third test sample is judged to be unqualified, otherwise it is qualified.

5. A rubber sealing ring sealing fatigue testing method according to claim 4, characterized in that: The calculation formula for obtaining the fatigue test value according to the first stress appearance test value, the second stress appearance test value and the third stress appearance test value is: Wherein, YLCS represents the fatigue test value; L represents the number of elastic test sets divided by the third test sample; acc (1,i) It is represented as the first appearance test value of the i-th elastic test set; acc (2,i) represents the second appearance test value obtained after the tensile test of the i-th elastic test set; acc (3,i) It represents the third appearance test value obtained after the extrusion test of the i-th elastic test set; σ1 represents the tensile test coefficient; σ2 represents the extrusion test coefficient.

6. A rubber sealing ring sealing fatigue testing system, characterized in that: include: A system control module, a test input module, a first test module, a second test module, a third test module and a test output module; wherein the system control module is used to control the start, pause and stop of the system; the test input module is used to obtain a test sample of the rubber sealing ring; the first test module is used to perform an appearance test on the obtained test sample to obtain an appearance test value and obtain a first output result; the second test module is used to perform a liquid sealing test on the first output result to obtain a sealing test value and obtain a second output result; the third test module is used to perform an elastic stress test on the second output result to obtain a fatigue test value and obtain a third output result; the test output module is used to obtain a final test result according to the test conditions of the first output result, the second output result and the third output result and display and output the final test result.

7. A rubber sealing ring sealing fatigue testing system according to claim 6, characterized in that: The calculation formula for the first test module to obtain the appearance test value is: Wherein, WGCS represents the appearance test value; M represents the number of the first test samples; α1 represents the size characteristic coefficient; cc i It is represented by the size test value of the i-th sample; α2 is represented by the color characteristic coefficient; ys i It is represented by the color uniformity of the i-th sample; α3 is represented by the pothole characteristic coefficient; kd i It is expressed as the number of holes in the i-th sample; It is expressed as the area of ​​the j1th hole of the i-th sample; is the maximum depth of the j1th hole of the i-th sample; α4 is the crack characteristic coefficient; lw i It is expressed as the number of cracks in the i-th sample; It is expressed as the maximum length of the j2nd crack of the i-th sample; It is expressed as the maximum width of the j2nd crack of the i-th sample; The calculation formula of the size test value is: Among them, cc i It is represented as the size test value of the i-th sample; wj i Represented as the outer diameter of the i-th sample; wj th Represents the set outer diameter threshold; nj i Represented as the inner diameter of the i-th sample; nj th Indicates the set inner diameter threshold; hd i Expressed as the thickness of the i-th sample; hd th It represents the set thickness threshold; β1 represents the outer diameter coefficient; β2 represents the inner diameter coefficient; β3 represents the thickness coefficient.

8. A rubber sealing ring sealing fatigue testing system according to claim 6, characterized in that: The calculation formula for the second test module to obtain the sealing test value is: MFCS = λ*ccs+(1-λ)*lcs; Wherein, MFCS represents the sealing test value; λ represents the weight of the sealing test value; ccs represents the size difference test value; lcs represents the leakage difference test value; N represents the number of the second test samples; ω i Represented as the test coefficient of the i-th size information; tcc (i,j) Represents the i-th test size information of the j-th sample; icc (i,j) It is represented as the i-th initial size information of the j-th sample; μ1 is represented as the test coefficient of the leakage rate; ρ j Expressed as the leakage rate of the jth sample; ρ th It is expressed as the set leakage rate threshold; μ2 is expressed as the test coefficient of the leakage area; mj j Expressed as the leakage area of ​​the jth sample; mj th It is expressed as the set leakage area threshold.

9. A rubber sealing ring sealing fatigue testing system according to claim 6, characterized in that: The specific implementation process of the elastic stress test includes: Set K stretching directions, K extrusion directions, P stretching degrees and P extrusion degrees; and set L elastic test temperatures; Divide the third test sample into L elastic test sets; each elastic test set corresponds to an elastic test temperature; each elastic test set performs a tensile test and an extrusion test; Input each of the elastic test sets into the appearance detection model to obtain a first stress appearance feature, and obtain a first stress appearance test value of each of the elastic test sets by referring to a calculation formula of the appearance test value; Performing a tensile test on each sample in the elastic test set, and stretching the sample along each stretching direction at a corresponding elastic test temperature using different stretching degrees; after stretching at time t1, canceling the tension, inputting the sample set after the tensile test into the appearance detection model, and obtaining the second stress appearance feature of the sample set, thereby obtaining a second stress appearance test value; Performing an extrusion test on each sample in the elastic test set, and extruding with different extrusion degrees along each extrusion direction at the corresponding elastic test temperature; after extrusion at time t2, canceling the pressure, inputting the sample set after the extrusion test into the appearance detection model, and obtaining the third stress appearance feature of the sample set, and obtaining the third stress appearance test value; A fatigue test value is obtained according to the first stress appearance test value, the second stress appearance test value and the third stress appearance test value; the fatigue test value is compared with a fatigue test threshold value, and if the fatigue test threshold value is exceeded, the third test sample is judged to be unqualified, otherwise it is qualified.

10. A rubber sealing ring sealing fatigue testing system according to claim 9, characterized in that: The calculation formula of the fatigue test value is: Wherein, YLCS represents the fatigue test value; L represents the number of elastic test sets divided by the third test sample; acc (1 ,i) represents the first stress appearance test value of the i-th elastic test set; acc (2,i) represents the second stress appearance test value obtained after the tensile test of the i-th elastic test set; acc (3,i) It represents the third stress appearance test value obtained after the extrusion test of the i-th elastic test set; σ1 represents the tensile test coefficient; σ2 represents the extrusion test coefficient.

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