An impact test method for a new 10kV pole-mounted vacuum circuit breaker visible base

Abstract

The present invention relates to the field of impact testing technology, and specifically to an impact testing method for a new type of 10kV pole-mounted vacuum circuit breaker visual base. The method obtains an impact difference index based on the similarity of the vibration extreme value sequence of each impact test and the difference in vibration characteristic index between the previous impact test, and obtains the critical impact energy of the normal test based on the similarity of the vibration extreme value sequence of the impact test and the control impact test in the normal test and the difference in vibration characteristic index; obtains the critical impact energy of the interference test based on the time interval between the impact test and the previous impact test in the interference test and the difference in vibration duration of the control impact test, as well as the impact difference index; and judges the impact resistance quality of the visual base by combining the critical impact energy of all tests with the impact energy of the impact test. The present invention simulates the impact test of the visual base under different impact environments to improve the accuracy of judging the impact resistance quality of the visual base.

Description

Technical Field

[0001] The invention relates to the technical field of impact testing, and in particular to an impact testing method for a novel 10kV pole-mounted vacuum circuit breaker visual base. Background Art

[0002] Vacuum circuit breakers are important control and protection devices in power systems. Their safety and reliability are directly related to the stable operation of power systems. Pole-mounted vacuum circuit breakers mainly play a vital role in substations and power distribution systems of industrial and mining enterprises. When the power is connected or disconnected, the instantaneous current or voltage generated by the instantaneous change in power supply voltage will produce a strong impact force. The visible base of the vacuum circuit breaker may not be able to withstand the strong impact force, resulting in failure, which in turn affects the normal operation of the power system. In order to improve the overall performance of the vacuum circuit breaker and extend its service life, it is necessary to perform an impact test on the visible base of the pole-mounted vacuum circuit breaker.

[0003] The existing method applies different impact energies to the object and analyzes the impact resistance of the object according to whether the object is damaged under each impact energy; the existing method of impact testing the object usually completes one impact test, that is, the vibration of the object stops before the next impact test is performed. However, in actual situations, the instantaneous current or voltage generated by the instantaneous change of the power supply voltage may cause high-frequency and continuous impact on the visible base, causing the impact energy to accumulate continuously, resulting in inaccurate impact resistance quality of the visible base of the pole-mounted vacuum circuit breaker measured in an impact environment where the next impact test is performed after one impact test is completed. Summary of the invention

[0004] In order to solve the technical problem that high-frequency impact test on the visual base causes continuous accumulation of impact energy, resulting in low accuracy of impact quality analysis of the visual base, the purpose of the present invention is to provide an impact test method for a new 10kV pole-mounted vacuum circuit breaker visual base, and the technical scheme adopted is as follows:

[0005] The present invention proposes an impact test method for a novel 10kV pole-mounted vacuum circuit breaker visible base, the method comprising:

[0006] Obtaining a vibration extreme value sequence of impact tests of a visible base of a pole-mounted vacuum circuit breaker with different impact energies in several tests; the types of the tests include normal type and interference type, and the test sequence of the normal type test is before the interference type test;

[0007] Obtaining a vibration characteristic index for each impact test; obtaining an impact difference index for each impact test based on the similarity between the vibration extreme value sequence of each impact test and the previous impact test and the difference in the vibration characteristic index;

[0008] Obtain a control shock test for each shock test; obtain the critical shock energy of each normal test according to the similarity of the vibration extreme value sequence and the difference of the vibration characteristic index between each shock test and the control shock test in each normal test, and the shock difference index of each shock test;

[0009] According to the time interval between each impact test and the previous impact test in each interference test and the difference in vibration duration of the control impact test of the previous impact test, as well as the impact difference index of each impact test, the critical impact energy of each interference test is obtained;

[0010] The impact resistance quality of the visual base is judged according to the time intervals between adjacent impact tests in all tests, the impact energy of each impact test, and the critical impact energy.

[0011] Furthermore, obtaining the vibration characteristic index of each impact test includes:

[0012] The vibration data in the vibration extreme value sequence have corresponding moments;

[0013] According to the time interval between each vibration data and the corresponding moment of the next adjacent vibration data in each vibration extreme value sequence and each vibration data, a local vibration value of each vibration data in each vibration extreme value sequence is obtained;

[0014] The cumulative sum of the local vibration values ​​of the remaining vibration data except the last vibration data in the vibration extreme value sequence of each impact test is used as the comprehensive vibration value of each impact test;

[0015] According to the vibration duration of each impact test and the comprehensive vibration value, a vibration characteristic index corresponding to the impact test is obtained.

[0016] Further, obtaining the impact difference index of each impact test includes:

[0017] A two-dimensional coordinate system is established with the impact energy as the horizontal axis and the vibration characteristic index as the vertical axis; all impact tests in each test are marked in the two-dimensional coordinate system to obtain coordinate points, curve fitting is performed on the coordinate points in the two-dimensional coordinate system, and the obtained fitting curve is recorded as the vibration characteristic curve of each test;

[0018] The difference between the slope of the corresponding point on the vibration characteristic curve of each impact test and the previous impact test in the test of each impact test is taken as the vibration characteristic change rate of each impact test;

[0019] Obtaining the DTW distance between the vibration extreme value sequence of each shock test and the previous shock test, and recording it as a local difference index corresponding to the two shock tests;

[0020] The impact difference index of each impact test is obtained according to the vibration characteristic change rate and the local difference index.

[0021] Furthermore, obtaining the critical impact energy of each normal test includes:

[0022] The impact difference index of each impact test in the first normal test is used as the first critical possibility of the corresponding impact test;

[0023] For the shock tests in the normal tests except the first normal test, the fluctuation specific index of each shock test is obtained according to the difference between the local difference index and the vibration characteristic index between each shock test and the control shock test; the first critical possibility degree of each shock test is obtained according to the shock difference index and the fluctuation specific index;

[0024] According to the first critical probability of all impact tests in each normal test, the critical impact energy of each test is obtained.

[0025] Furthermore, obtaining the critical impact energy of each interference test includes:

[0026] For the impact tests in all interference tests, the overall control vibration duration of each impact test is obtained according to the vibration duration of the control impact test of each impact test;

[0027] The absolute value of the difference between the time interval between each impact test and the previous impact test and the overall control vibration duration of the previous impact test is taken as the energy accumulation value of each impact test;

[0028] According to the energy accumulation value and the impact difference index of each impact test, a second critical possibility degree of each impact test is obtained; the energy accumulation value and the second critical possibility degree are negatively correlated, and the impact difference index and the second critical possibility degree are positively correlated;

[0029] According to the second critical probability of all impact tests in each interference test, the critical impact energy of each test is obtained.

[0030] Furthermore, obtaining the critical impact energy of each test includes:

[0031] Recording the first critical possibility and the second critical possibility as analysis critical possibility;

[0032] According to the order of impact energy from small to large, the analysis critical possibility of the impact test in each test is judged against the preset critical threshold in turn until the analysis critical possibility is greater than the preset critical threshold, and the judgment is stopped. The analysis critical possibility when the judgment is stopped corresponds to the impact energy of the impact test, which is used as the critical impact energy of each test.

[0033] Furthermore, judging the impact resistance quality of the visual base according to the time intervals between adjacent impact tests in all tests, the impact energy of each impact test, and the critical impact energy includes:

[0034] For the impact test of each test, the critical impact energy of each test corresponding to the impact test before the impact test is recorded as the analytical test of each test;

[0035] According to the time interval between each analytical test and the next impact test in each test, and the impact energy of each analytical test, the local cumulative impact degree of each analytical test is obtained; the cumulative sum of the local cumulative impact degrees of all analytical tests in each test is taken as the overall cumulative impact degree of each test;

[0036] According to the overall cumulative impact strength and critical impact energy of each test, the local impact resistance of each test is obtained; the mean values ​​of the local impact resistances of all tests are normalized to obtain an impact resistance index;

[0037] The impact resistance quality of the visual base is judged according to the impact resistance index.

[0038] Further, judging the impact resistance quality of the visual base according to the impact resistance index includes:

[0039] When the impact resistance index is greater than the preset qualified threshold, the impact resistance quality of the visible base of the pole-mounted vacuum circuit breaker is qualified; when the impact resistance index is less than or equal to the preset qualified threshold, the impact resistance quality of the visible base of the pole-mounted vacuum circuit breaker is unqualified.

[0040] Furthermore, the impact energy of each impact test is equal to that of its control impact test, the test sequence of the control impact test is located before the test of each impact test, and the control impact test is in a normal test.

[0041] Further, the obtaining of the fluctuation-specific index of each impact test according to the difference between the local difference index and the vibration characteristic index of each impact test and the control impact test includes:

[0042] Select one impact test from the normal tests except the first normal test as the target test, and obtain the initial specific index of the target test and each of the control impact tests according to the difference between the local difference index and the vibration characteristic index of the target test and each of the control impact tests;

[0043] Record the mean of the initial specific index of the target test and all its control impact tests as the comprehensive specific index of the target test; obtain the discrete index of the initial specific index of the target test and all its control impact tests;

[0044] According to the comprehensive specific index and the discrete index, the fluctuation specific index of the target test is obtained.

[0045] The present invention has the following beneficial effects:

[0046] In an embodiment of the present invention, the impact information of the visual base of the pole-mounted vacuum circuit breaker under different impact environments is simulated; the fluctuation of the vibration data in the vibration extreme value sequence and the vibration characteristic index both reflect the vibration attenuation of the impact test, the similarity between each impact test and the vibration extreme value sequence of the previous impact test and the difference in vibration characteristic index present the difference in vibration attenuation of the two impact tests, and the impact difference index is analyzed to obtain the possibility that the impact energy of the impact test reaches the bearing critical value of the visual base; the similarity between the vibration extreme value sequence and the difference in vibration characteristic index between each impact test and the control impact test in the normal test both reflect the similarity of the vibration attenuation degree under the same impact energy, thereby presenting the vibration specificity under the impact energy of the impact test, and combined with the analysis of the impact difference index, the normal test is improved. The accuracy of critical impact energy analysis of interference type tests; interference type tests will produce cumulative fatigue. The vibration duration of the impact test is the attenuation time required for the impact energy. The time interval between each impact test and the previous impact test and the difference in the vibration duration of the control impact test of the previous impact test present the energy accumulation of each impact test due to the previous impact test, and combined with the impact difference index analysis, the accuracy of critical impact energy analysis of interference type tests is improved; the time interval between adjacent impact tests presents the cumulative fatigue severity of the visible base, and the impact energy reflects the energy accumulation that each impact test may cause to the next impact test, and combined with the critical impact energy analysis, the relevant information under different impact environments is combined to judge the impact resistance quality of the visible base, and the accuracy of the impact resistance quality of the visible base in complex impact environments is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 A flowchart of the steps of an impact test method for a novel 10kV pole-mounted vacuum circuit breaker visual base provided by one embodiment of the present invention;

[0049] Figure 2 A structural diagram of an impact test system for a new 10kV pole-mounted vacuum circuit breaker visual base provided by one embodiment of the present invention;

[0050] Figure 3 A computer device schematic diagram of an impact test device for a new 10kV pole-mounted vacuum circuit breaker visual base provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the impact test method for a new type of 10kV pole-mounted vacuum circuit breaker visual base proposed by the present invention, its specific implementation method, structure, features and effects are described in detail as follows in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0052] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0053] The following is a detailed description of a specific scheme of an impact test method for a novel 10kV pole-mounted vacuum circuit breaker visible base provided by the present invention in conjunction with the accompanying drawings.

[0054] Embodiment 1:

[0055] The present invention proposes an impact test method for a new type of 10kV pole mounted vacuum circuit breaker visual base, please refer to Figure 1 , which shows a flow chart of steps of an impact test method for a new 10kV pole-mounted vacuum circuit breaker visual base provided by an embodiment of the present invention, the method comprising:

[0056] Step S1: obtaining a vibration extreme value sequence of impact tests of a visible base of a pole-mounted vacuum circuit breaker with different impact energies in several tests; the test types include normal type and interference type, and the test sequence of the normal type test is before the interference type test.

[0057] Specifically, the visible base of the pole-mounted vacuum circuit breaker is fixed on the bracket or support of the impact tester, and a vibration sensor is installed on the visible base to collect vibration data generated after the visible base is impacted. The pendulum of the impact tester is lifted to a certain height and released to impact the visible base. One impact on the visible base is one impact test, and the height of the pendulum's descent during each impact test is used as the impact energy of the corresponding impact test.

[0058] The time period between each impact test of the visual base and the moment when the next impact test begins is recorded as the analysis time period of each impact test; the vibration data of the vibration sensor on the visual base at all times in the analysis time period are obtained. In this embodiment, a rectangular coordinate system is established with time as the horizontal axis and vibration data as the vertical axis, the vibration data at all times in the analysis time period are marked in the rectangular coordinate system to obtain coordinate points, the fitting curve obtained by curve fitting all coordinate points in the rectangular coordinate system is recorded as the vibration curve, and the vibration data corresponding to all maximum value points on the vibration curve are arranged in time sequence to obtain the vibration extreme value sequence of each impact test.

[0059] It should be noted that the frequency of the vibration sensor collecting vibration data is 10 Hz, and the implementer can set it according to the specific situation. This embodiment uses the least squares method for curve fitting, where the least squares method is a well-known technology for those skilled in the art and will not be described in detail here. In other embodiments, the swing angle of the pendulum during each impact test can also be used as the impact energy of the corresponding impact test; the absolute values ​​of the vibration data corresponding to the minimum point on the vibration curve are arranged in time sequence to obtain a vibration extreme value sequence.

[0060] This scheme analyzes the impact resistance of the visible base of the pole-mounted vacuum circuit breaker. It is necessary to obtain the critical information of the visible base under impact. Therefore, each test includes multiple impact tests, and the impact energy of the impact test is set from small to large. The visible base is tested multiple times, and the multiple tests are in a time sequence.

[0061] In order to simulate the changes in critical information of the visual base under different impact environments, the test of the visual base is divided into two types, including normal type and interference type. In the normal type test, the visual base will conduct the next impact test only after the vibration generated by each impact test stops, and in the interference type test, the visual base will conduct the next impact test before the vibration generated by each impact test stops.

[0062] It should be noted that the impact energy of different impact tests in each test is randomly set, but the impact energy of impact tests in different tests of the same type cannot be exactly the same; after an impact test is completed, the position of the visual base needs to be adjusted so that the pendulum impacts different positions of the visual base in different impact tests to avoid damage to the visual base structure, which will cause errors in the analysis of subsequent impact tests.

[0063] For each impact test of the normal test, the time between the moment when the visible base begins to be impacted and the moment when the vibration stops is recorded as the vibration duration of the impact test; the time interval between two adjacent impact tests in each test, that is, the time interval between each impact test and the beginning of the impact of the next impact test, can be set randomly.

[0064] Step S2: Obtain the vibration characteristic index of each impact test; obtain the impact difference index of each impact test according to the similarity of the vibration extreme value sequence of each impact test and the difference of the vibration characteristic index between each impact test and the previous impact test.

[0065] After an object is impacted, it will vibrate to release energy. Vibration can convert impact energy into kinetic energy, propagate and disperse the impact energy inside the object, thereby reducing damage to the object's structure. The vibration characteristic index reflects the vibration attenuation characteristics of the vibration wave generated by the impact test of the visual base. Among them, the vibration wave is composed of vibration data at all times during the analysis period of the impact test.

[0066] Preferably, in some possible implementations of the present embodiment, the method for obtaining vibration characteristic indicators includes: obtaining the local vibration value of each vibration data in each vibration extreme value sequence based on the time interval between each vibration data and the corresponding moment of the next adjacent vibration data in each vibration extreme value sequence and each vibration data; taking the cumulative sum of the local vibration values ​​of the remaining vibration data except the last vibration data in the vibration extreme value sequence of each impact test as the comprehensive vibration value of each impact test; and obtaining the vibration characteristic indicator of the corresponding impact test based on the vibration duration and the comprehensive vibration value of each impact test.

[0067] As the wave loses energy during propagation, its shape and period will change, that is, the wave will attenuate during propagation. Specifically, the amplitude of the vibration wave of the impact test decreases with time and the period of the vibration wave decreases, that is, the time interval between adjacent maximum points gradually decreases to adapt to the situation of energy reduction. The time interval between each vibration data and the corresponding moment of the next adjacent vibration data in the vibration extreme value sequence reflects the periodic characteristics of the vibration wave. The vibration data reflects the amplitude of the vibration wave. The larger the local vibration value of the vibration data, the smaller the vibration attenuation characteristics of the vibration wave at the position of the vibration data; therefore, the time interval between each vibration data and the corresponding moment of the next adjacent vibration data and each vibration data are positively correlated with the local vibration value.

[0068] The comprehensive vibration value reflects the overall vibration attenuation of the vibration wave of the impact test. The larger the comprehensive vibration value, the smaller the attenuation of the vibration wave. The vibration duration of the impact test is the attenuation time required for the impact energy. The longer the attenuation time, the smaller the attenuation of the vibration wave. The vibration characteristic index is used to measure the vibration attenuation characteristics of the impact test. The larger the vibration characteristic index, the smaller the attenuation of the vibration wave of the impact test. Therefore, the vibration duration of each impact test is positively correlated with the comprehensive vibration value and the vibration characteristic index.

[0069] In this embodiment, the product of the vibration duration of each impact test and the comprehensive vibration value is normalized to obtain the vibration characteristic index of the corresponding impact test. In this embodiment, the correlation between the vibration duration, the comprehensive vibration value and the vibration characteristic index can also be constructed through other basic mathematical operations, which will not be limited or elaborated here.

[0070] In a specific implementation of this embodiment, the vibration characteristic index is expressed by the formula:

[0071]

[0072] Where D is the vibration characteristic index of each impact test; T is the vibration duration of each impact test; N is the total number of vibration data in the vibration extreme value sequence of each impact test; It is the nth vibration data except the last vibration data in the vibration extreme value sequence of each impact test; It is the time interval between the nth vibration data except the last vibration data in the vibration extreme value sequence of each impact test and the corresponding moment of the next vibration data; It is the local vibration value of the nth vibration data except the last vibration data in the vibration extreme value sequence of each impact test; is the comprehensive vibration value of each impact test; Norm is the normalization function.

[0073] If the impact energy of the impact test does not exceed the bearing limit of the visible base and the impact energies of two adjacent impact tests are relatively close, the vibration attenuation of the vibration wave of each impact test should be relatively similar to that of the previous impact test; if the impact energy of the impact test is just at the bearing limit of the visible base, the visible base structure is damaged and the bearing capacity is weakened, then the vibration attenuation of the vibration wave of each impact test is quite different from that of the previous impact test. The fluctuation of the vibration data in the vibration extreme value sequence and the vibration characteristic index both reflect the vibration attenuation of the vibration wave of the impact test; the similarity of the vibration extreme value sequence of each impact test and the difference of the vibration characteristic index between each impact test and the previous impact test are comprehensively analyzed to obtain the impact difference index and measure the critical situation of each impact test.

[0074] Preferably, in some possible implementations of this embodiment, the method for obtaining the impact difference index includes: establishing a two-dimensional coordinate system with the impact energy as the horizontal axis and the vibration characteristic index as the vertical axis; marking all the impact tests in each test in the two-dimensional coordinate system to obtain coordinate points, performing curve fitting on the coordinate points in the two-dimensional coordinate system, and recording the obtained fitting curve as the vibration characteristic curve of each test; taking the difference between the slopes of the corresponding points on the vibration characteristic curve of each impact test and the previous impact test in each impact test as the vibration characteristic change rate of each impact test; obtaining the DTW distance between the vibration extreme value sequence of each impact test and the previous impact test, and recording it as the local difference index corresponding to the two impact tests; obtaining the impact difference index of each impact test according to the vibration characteristic change rate and the local difference index. Among them, the calculation method of the DTW distance in the dynamic time warping algorithm is a well-known technology for those skilled in the art and will not be repeated here.

[0075] For the impact test in each test, if the impact energy does not reach the bearing limit of the visual base, the vibration attenuation of the vibration wave of the impact test will gradually decrease as the impact energy increases; if the impact energy exceeds the bearing limit of the visual base, the vibration attenuation of the vibration wave will be aggravated because the object cannot effectively absorb energy. Therefore, the vibration characteristic curve of each test shows a trend of first increasing and then sharply decreasing; if the difference between the slopes of the corresponding points on the corresponding vibration characteristic curve of each impact test and the previous impact test, that is, the greater the vibration characteristic change rate, the greater the difference in the vibration attenuation of the vibration waves of the two impact tests, then the greater the impact difference index. In this embodiment, the difference between the two slopes is the absolute value of the difference between the two slopes.

[0076] The local difference index measures the similarity of the vibration attenuation of the vibration waves of the two impact tests. The larger the local difference index, the smaller the similarity of the vibration attenuation of the vibration waves of the two impact tests, and the greater the difference in the vibration attenuation of the vibration waves of the two impact tests. The DTW distance, Euclidean distance and Pearson correlation coefficient between two sequences all reflect the similarity between the two sequences. In other embodiments, the above DTW distance can also be replaced by Euclidean distance or Pearson correlation coefficient to obtain the local difference index.

[0077] Therefore, the vibration characteristic change rate and the local difference index are both positively correlated with the impact difference index. In this embodiment, the product of the vibration characteristic change rate and the local difference index of each impact test is normalized to obtain the impact difference index of the corresponding impact test. This embodiment can also construct the correlation between the vibration characteristic change rate and the local difference index and the impact difference index through other basic mathematical operations, which will not be limited or elaborated here.

[0078] It should be noted that in this embodiment, an exponential function with a natural constant as the base is used for normalization processing, and other methods can also be selected to achieve normalization processing; the least square method is selected for curve fitting, which is not limited here. In this embodiment, the impact difference index of the first impact test in each test is set to zero, and the implementer can set it according to the specific situation.

[0079] If the impact difference index is larger, the difference in the vibration attenuation characteristics of the vibration wave of each impact test and the previous impact test is greater, which may be caused by the damage or imminent damage of the visible base, and the possibility that the impact energy of the impact test will reach the critical limit of the visible base is greater; conversely, the possibility that the impact energy of the impact test will reach the critical limit is smaller.

[0080] Step S3: Obtain a control impact test for each impact test; obtain the critical impact energy of each normal test based on the similarity of the vibration extreme value sequence and the difference in vibration characteristic index between each impact test and the control impact test in each normal test, as well as the impact difference index of each impact test.

[0081] Since there are various energy changes reaching the bearing critical value of the visual base, in order to improve the accuracy of the critical analysis of the visual base, a control impact test is obtained for each impact test. In this embodiment, the impact energy of each impact test is equal to that of its control impact test, the test sequence of the control impact test is located before the test of each impact test, and the control impact test is in the normal test.

[0082] The similarity of the vibration extreme value sequence and the difference of vibration characteristic indexes between each impact test and the control impact test in the normal test reflect the similarity of the vibration attenuation degree of the vibration wave under the same impact energy, thereby presenting the specificity of the vibration wave under the impact energy of each impact test, and combining with the impact difference index for analysis to improve the accuracy of the critical impact energy analysis of the normal test.

[0083] Preferably, in some possible implementation methods of the present embodiment, the method for obtaining the first critical possibility degree includes: taking the impact difference index of each impact test in the first normal test as the first critical possibility degree of the corresponding impact test; for the impact tests in normal tests other than the first normal test, obtaining the fluctuation specific index of each impact test according to the difference between the local difference index and the vibration characteristic index between each impact test and the control impact test; obtaining the first critical possibility degree of each impact test according to the impact difference index and the fluctuation specific index.

[0084] In this embodiment, the specific method for obtaining the fluctuation-specific index includes: selecting any impact test from the normal tests except the first normal test as the target test, obtaining the initial specific index of the target test and each of its control impact tests according to the differences between the local difference index and the vibration characteristic index of the target test and each of its control impact tests; recording the average of the initial specific index of the target test and all of its control impact tests as the comprehensive specific index of the target test; obtaining the discrete index of the initial specific index of the target test and all of its control impact tests; and obtaining the fluctuation-specific index of the target test according to the comprehensive specific index and the discrete index.

[0085] The local difference index between the target test and each control shock test measures the difference in the vibration attenuation degree of the vibration wave under the same shock energy by analyzing the similarity of the vibration extreme value sequence, and is analyzed in combination with the difference in the vibration characteristic index of the corresponding two shock tests. If the difference between the local difference index and the vibration characteristic index between the target test and each control shock test is greater, the difference in the attenuation degree of the vibration wave of the shock test under the same energy is greater, and the initial specific index is greater. Therefore, the difference between the local difference index and the vibration characteristic index between the target test and each control shock test is positively correlated with the initial specific index.

[0086] In this embodiment, the product of the absolute value of the difference between the local difference index and the vibration characteristic index of the target test and each control impact test is used as the initial specific index of the target test and each control impact test. This embodiment can also construct the correlation between the absolute value of the difference between the local difference index and the vibration characteristic index and the initial specific index through other basic mathematical operations, which will not be limited or elaborated here.

[0087] The comprehensive specific index reflects the overall difference in the vibration attenuation degree of the vibration wave between the target test and all the control impact tests, and further measures the specificity of the target test. The larger the comprehensive specific index is, the greater the waveform change of the same impact energy, that is, the greater the change in the vibration attenuation degree, and the greater the specificity of the impact energy of the target test; the larger the discrete index of the initial specific index between the target test and all the control impact tests, the greater the discrete degree of the vibration attenuation characteristics of the vibration wave of the same impact energy, and the lower the credibility of the comprehensive specific index. Therefore, the comprehensive specific index is positively correlated with the fluctuation specific index, and the discrete index is negatively correlated with the fluctuation specific index. In this embodiment, the product of the comprehensive specific index and the discrete index of the target test is used as the fluctuation specific index of the target test.

[0088] Because there are diversity in the energy changes that reach the critical bearing capacity of the visible base, the larger the fluctuation specific index, the greater the specificity of the target test, that is, the greater the change in the vibration attenuation characteristics of the impact test with the same impact energy, the greater the possibility that the impact energy of the target test will reach the critical bearing capacity of the visible base.

[0089] It should be noted that variance, standard deviation and range can all reflect the degree of discreteness of data. In this embodiment, the variance of the initial specific indicators of all control impact tests of the target test is used as a discrete indicator. In other embodiments, the variance can be replaced by the standard deviation or range.

[0090] Since the larger the impact difference index and the fluctuation specific index are, the greater the possibility that the impact energy of the impact test reaches the bearing critical value of the visual base, the impact difference index and the fluctuation specific index are positively correlated with the first critical possibility. In this embodiment, the product of the impact difference index and the fluctuation specific index of each impact test is normalized to obtain the first critical possibility of the corresponding impact test. If the first critical possibility is larger, the greater the possibility that the impact energy of the impact test is the critical impact energy of the normal test; the critical impact energy is the maximum impact energy that the visual base can withstand before being damaged.

[0091] According to the order of impact energy from small to large, the first critical possibility of the impact test in each normal test is judged against the preset critical threshold in turn until the first critical possibility is greater than the preset critical threshold, and the judgment is stopped. The first critical possibility when the judgment is stopped corresponds to the impact energy of the impact test, which is used as the critical impact energy of each normal test.

[0092] It should be noted that the preset critical threshold is an empirical value of 0.78, and implementers can set it according to specific circumstances.

[0093] Step S4: Obtain the critical impact energy of each interference test according to the time interval between each impact test and the previous impact test in each interference test, the difference in vibration duration of the control impact test of the previous impact test, and the impact difference index of each impact test.

[0094] The interference test is that the next impact test is carried out on the visual base before the vibration generated by each impact test stops. This simulated impact situation will cause cumulative fatigue of the visual base. Because the first critical possibility may produce a certain specificity in the face of energy accumulation, resulting in inaccurate analysis of the critical impact energy of the interference test, the analysis of the critical impact energy of the interference test cannot take into account the differences in vibration attenuation characteristics of impact tests with the same impact energy, and the analysis method of the critical impact energy of the interference test needs to be reset.

[0095] The vibration duration of the impact test is the attenuation time required for the impact energy. The time interval between each impact test and the previous impact test in the interference test shows the attenuated part of the impact energy of the previous impact test. The difference between the time interval between each impact test and the previous impact test and the vibration duration of the control impact test of the previous impact test shows the part of the impact energy of the previous impact test that has not yet attenuated. Combined with the impact difference index that shows the possibility of the impact energy of the impact test reaching the critical bearing capacity of the visual base, analysis is performed to improve the accuracy of the critical impact energy analysis of the interference test.

[0096] Preferably, in some possible implementations of the present embodiment, the method for obtaining the second critical possibility degree includes: for the impact tests in all interference-type tests, according to the vibration duration of the control impact test of each impact test, obtaining the overall control vibration duration of each impact test; taking the absolute value of the difference between the time interval between each impact test and the next impact test and the overall control vibration duration of each impact test as the energy accumulation value of each impact test; according to the energy accumulation value of each impact test and the impact difference index, obtaining the second critical possibility degree of each impact test; the energy accumulation value is negatively correlated with the second critical possibility degree, and the impact difference index is positively correlated with the second critical possibility degree.

[0097] The overall control vibration duration reflects the overall level of the vibration duration of the control impact test of the impact test, and presents the energy decay duration required for the impact test without the impact energy accumulation of the previous impact test. In this embodiment, the mean of the vibration duration of all control impact tests of each impact test is used as the overall control vibration duration. The median and the mode can also reflect the centralized distribution trend of a set of data. In other embodiments, the mean can also be replaced by the median or the mode.

[0098] If the absolute value of the difference between the time interval between each impact test and the previous impact test and the overall control vibration duration of the previous impact test is smaller, it means that the impact energy of the previous impact test is accumulated to the current impact test less, and the energy accumulation value is smaller, and the impact difference index of each impact test is more accurate. If the impact difference index is larger, the possibility that the impact energy of the impact test reaches the bearing critical value of the visual base is greater. Therefore, the energy accumulation value is negatively correlated with the second critical possibility, and the impact difference index is positively correlated with the second critical possibility.

[0099] In this embodiment, the energy accumulation value of each impact test is negatively mapped, and the product of the mapping result and the impact difference index is normalized to obtain the second critical possibility of each impact test. It should be noted that in this embodiment, the Norm function is used for normalization, and an exponential function with a natural constant as the base is selected for negative correlation mapping. Other normalization and negative correlation mapping methods can also be selected, which are not limited here. It should be noted that the energy accumulation value of the first impact test in each interference test is set to zero, and the implementer can set it according to the specific situation.

[0100] According to the order of impact energy from small to large, the second critical possibility of the impact test in each interference test is judged against the preset critical threshold in turn until the second critical possibility is greater than the preset critical threshold, and the judgment is stopped. The second critical possibility when the judgment is stopped corresponds to the impact energy of the impact test, which is used as the critical impact energy of each interference test.

[0101] Step S5: judging the impact resistance quality of the visual base according to the time intervals between adjacent impact tests in all tests, the impact energy of each impact test, and the critical impact energy.

[0102] The time interval between adjacent impact tests presents the cumulative fatigue severity of the visible base, and the impact energy of the impact test reflects the impact intensity of the visible base during the impact test. The two combined present the impact accumulation of the visual base; and combined with the critical impact energy of each test for analysis, the impact resistance is obtained, and then the impact resistance quality of the visual base is judged.

[0103] Preferably, in some possible implementations of the present embodiment, the method for obtaining the impact resistance index includes: for the impact test of each test, recording the impact test before the impact test corresponding to the critical impact energy of each test as the analysis test of each test; obtaining the local cumulative impact degree of each analysis test according to the time interval between each analysis test and the next impact test in each test, and the impact energy of each analysis test; taking the sum of the local cumulative impact degrees of all analysis tests in each test as the overall cumulative impact degree of each test; obtaining the local impact resistance of each test according to the overall cumulative impact degree and the critical impact energy of each test; and normalizing the mean of the local impact resistance of all tests to obtain the impact resistance index.

[0104] Since the relevant data of the impact test after the visual base is damaged is not credible, and the impact energy when damaged cannot be used as an indicator for quality monitoring of the visual base, this embodiment selects the analysis test of each test, and the analysis test is the impact test when the visual base is not damaged.

[0105] The shorter the time interval between each analysis test and the next impact test in each test, the more serious the cumulative fatigue of the visual base, and the greater the impact energy of the analysis test, the stronger the impact intensity of the visual base in the impact test, which may cause more energy accumulation in the next impact test; therefore, the above time interval is negatively correlated with the local cumulative impact degree, and the impact energy is positively correlated with the local cumulative impact degree. In this embodiment, the time interval between each analysis test and the next impact test in each test is negatively correlated, and the product of the mapping result and the impact energy of each analysis test is used as the local cumulative impact degree.

[0106] The overall cumulative impact strength presents the overall energy accumulation of all analysis tests in each test; the critical impact energy reflects the maximum impact force that the visual base can withstand under a single impact environment. The larger the critical impact energy, the less likely the visual base is to be damaged under a single impact environment; the larger the two values, the better the impact resistance of the visual base under a single impact environment, and the greater the local impact resistance. Therefore, the overall cumulative impact strength and the critical impact energy are both positively correlated with the local impact resistance. In this embodiment, the product of the overall cumulative impact strength and the critical impact energy of each test is used as the local impact strength of each test.

[0107] The mean of the local impact resistance of all tests is normalized to obtain the impact resistance index; the process of obtaining the impact resistance index comprehensively analyzes the relevant data under different impact environments, so that the impact resistance index is more adaptable to complex impact environments, thereby improving the accuracy of the impact resistance quality of the visible base.

[0108] When the impact resistance index is greater than the preset qualified threshold, the impact resistance quality of the visible base of the pole-mounted vacuum circuit breaker is qualified; when the impact resistance index is less than or equal to the preset qualified threshold, the impact resistance quality of the visible base of the pole-mounted vacuum circuit breaker is unqualified. It should be noted that the preset qualified threshold in this embodiment is an empirical value of 0.7, and the implementer can set it according to the specific situation.

[0109] So far, the present invention is completed.

[0110] Embodiment 2:

[0111] The present invention proposes an impact test system for a new type of 10kV pole mounted vacuum circuit breaker visual base, please refer to Figure 2 , which shows a structural diagram of an impact test system for a new 10kV pole-mounted vacuum circuit breaker visual base provided by an embodiment of the present invention, the system comprising:

[0112] The data acquisition module 610 is used to obtain the vibration extreme value sequence of the impact test of the visible base of the pole-mounted vacuum circuit breaker with different impact energies in several tests; the test types include normal type and interference type, and the test sequence of the normal type test is before the interference type test;

[0113] The shock difference analysis module 620 is used to obtain the vibration characteristic index of each shock test; according to the similarity of the vibration extreme value sequence of each shock test and the difference of the vibration characteristic index between each shock test and the previous shock test, the shock difference index of each shock test is obtained;

[0114] The normal critical analysis module 630 is used to obtain a control shock test for each shock test; according to the similarity of the vibration extreme value sequence and the difference of the vibration characteristic index between each shock test and the control shock test in each normal test, and the shock difference index of each shock test, the critical shock energy of each normal test is obtained;

[0115] The interference criticality analysis module 640 is used to obtain the critical impact energy of each interference type test according to the time interval between each impact test and the previous impact test in each interference type test and the difference in vibration duration of the control impact test of the previous impact test, as well as the impact difference index of each impact test;

[0116] The impact test module 650 is used to determine the impact resistance quality of the visual base according to the time intervals between adjacent impact tests in all tests, the impact energy of each impact test, and the critical impact energy.

[0117] It should be noted that: the equipment provided in the above embodiment is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the computer equipment is divided into different functional modules to complete all or part of the functions described above. In addition, the impact test system for a new 10kV pole-mounted vacuum circuit breaker visual base and the impact test method embodiment for a new 10kV pole-mounted vacuum circuit breaker visual base provided in the above embodiment belong to the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0118] Embodiment 3:

[0119] Figure 3 A computer device schematic diagram of an impact test device for a new 10kV pole-mounted vacuum circuit breaker visual base provided by an embodiment of the present invention. For example, Figure 3 As shown, the computer device includes: a memory 701, a processor 702, and a computer program 703 stored in the memory 701 and running on the processor 702, wherein when the processor 702 executes the computer program 703, the computer device can execute any of the impact test methods for the new 10kV pole-mounted vacuum circuit breaker visible base introduced above.

[0120] In addition, an embodiment of the present application also protects a device, which may include a memory and a processor, wherein the memory stores executable program code, and the processor is used to call and execute the executable program code to execute an impact test method for a new 10kV pole-mounted vacuum circuit breaker visual base provided in an embodiment of the present application.

[0121] In this embodiment, the functional modules of the device can be divided according to the above method example. For example, each functional module can be corresponded, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware. It should be noted that the division of modules in this embodiment is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0122] It should be understood that the device provided in this embodiment is used to perform the above-mentioned impact test method for the new 10kV pole-mounted vacuum circuit breaker visible base, and thus can achieve the same effect as the above-mentioned implementation method.

[0123] In the case of an integrated unit, the device may include a processing module and a storage module. When the device is applied to a device, the processing module may be used to control and manage the actions of the device. The storage module may be used to support the device to execute mutual program codes, etc.

[0124] The processing module may be a processor or a controller, which may implement or execute various exemplary logic blocks, modules and circuits included in the disclosure of this application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc. The storage module may be a memory.

[0125] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0126] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0127] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An impact test method for a new 10kV pole-mounted vacuum circuit breaker visual base, characterized in that: The method includes: Obtaining a vibration extreme value sequence of impact tests of different impact energies of a visible base of a pole-mounted vacuum circuit breaker in several tests; the types of the tests include normal type and interference type, and the test sequence of the normal type test is before the interference type test; in the normal type test, the next impact test is performed after the vibration generated by each impact test of the visible base stops, and in the interference type test, the next impact test is performed before the vibration generated by each impact test of the visible base stops; Obtaining a vibration characteristic index for each impact test; obtaining an impact difference index for each impact test based on the similarity between the vibration extreme value sequence of each impact test and the previous impact test and the difference in the vibration characteristic index; Obtain a control shock test for each shock test; obtain the critical shock energy of each normal test according to the similarity of the vibration extreme value sequence and the difference of the vibration characteristic index between each shock test and the control shock test in each normal test, and the shock difference index of each shock test; According to the time interval between each impact test and the previous impact test in each interference test and the difference in vibration duration of the control impact test of the previous impact test, as well as the impact difference index of each impact test, the critical impact energy of each interference test is obtained; According to the time intervals between adjacent impact tests in all tests, the impact energy of each impact test, and the critical impact energy, the impact resistance quality of the visual base is judged; The obtaining of vibration characteristic indicators of each impact test includes: The vibration data in the vibration extreme value sequence have corresponding moments; According to the time interval between each vibration data and the corresponding moment of the next adjacent vibration data in each vibration extreme value sequence and each vibration data, a local vibration value of each vibration data in each vibration extreme value sequence is obtained; The cumulative sum of the local vibration values ​​of the remaining vibration data except the last vibration data in the vibration extreme value sequence of each impact test is used as the comprehensive vibration value of each impact test; According to the vibration duration of each impact test and the comprehensive vibration value, a vibration characteristic index corresponding to the impact test is obtained; The obtaining of the impact difference index of each impact test includes: A two-dimensional coordinate system is established with the impact energy as the horizontal axis and the vibration characteristic index as the vertical axis; all impact tests in each test are marked in the two-dimensional coordinate system to obtain coordinate points, curve fitting is performed on the coordinate points in the two-dimensional coordinate system, and the obtained fitting curve is recorded as the vibration characteristic curve of each test; The difference between the slope of the corresponding point on the vibration characteristic curve of each impact test and the previous impact test in the test of each impact test is taken as the vibration characteristic change rate of each impact test; Obtaining the DTW distance between the vibration extreme value sequence of each shock test and the previous shock test, and recording it as a local difference index corresponding to the two shock tests; The impact difference index of each impact test is obtained according to the vibration characteristic change rate and the local difference index.

2. The impact test method for a new type of 10kV pole-mounted vacuum circuit breaker visual base according to claim 1 is characterized in that: The step of obtaining the critical impact energy of each normal test includes: The impact difference index of each impact test in the first normal test is used as the first critical possibility of the corresponding impact test; For the shock tests in the normal tests except the first normal test, the fluctuation specific index of each shock test is obtained according to the difference between the local difference index and the vibration characteristic index between each shock test and the control shock test; the first critical possibility degree of each shock test is obtained according to the shock difference index and the fluctuation specific index; According to the first critical probability of all impact tests in each normal test, the critical impact energy of each test is obtained.

3. The impact test method for a new type of 10kV pole-mounted vacuum circuit breaker visual base according to claim 2 is characterized in that: The step of obtaining the critical impact energy of each interference test comprises: For the impact tests in all interference tests, the overall control vibration duration of each impact test is obtained according to the vibration duration of the control impact test of each impact test; The absolute value of the difference between the time interval between each impact test and the previous impact test and the overall control vibration duration of the previous impact test is taken as the energy accumulation value of each impact test; According to the energy accumulation value and the impact difference index of each impact test, a second critical possibility degree of each impact test is obtained; the energy accumulation value and the second critical possibility degree are negatively correlated, and the impact difference index and the second critical possibility degree are positively correlated; According to the second critical probability of all impact tests in each interference test, the critical impact energy of each test is obtained.

4. The impact test method for a new type of 10kV pole-mounted vacuum circuit breaker visual base according to claim 3 is characterized in that: The method of obtaining the critical impact energy of each test includes: Recording the first critical possibility and the second critical possibility as analysis critical possibility; According to the order of impact energy from small to large, the analysis critical possibility of the impact test in each test is judged against the preset critical threshold in turn until the analysis critical possibility is greater than the preset critical threshold, and the judgment is stopped. The analysis critical possibility when the judgment is stopped corresponds to the impact energy of the impact test, which is used as the critical impact energy of each test.

5. The impact test method for a new type of 10kV pole-mounted vacuum circuit breaker visual base according to claim 1 is characterized in that: The method of judging the impact resistance quality of the visual base according to the time intervals between adjacent impact tests in all tests, the impact energy of each impact test, and the critical impact energy includes: For the impact test of each test, the critical impact energy of each test corresponding to the impact test before the impact test is recorded as the analytical test of each test; According to the time interval between each analytical test and the next impact test in each test, and the impact energy of each analytical test, the local cumulative impact degree of each analytical test is obtained; the cumulative sum of the local cumulative impact degrees of all analytical tests in each test is taken as the overall cumulative impact degree of each test; According to the overall cumulative impact strength and critical impact energy of each test, the local impact resistance of each test is obtained; the mean values ​​of the local impact resistances of all tests are normalized to obtain an impact resistance index; The impact resistance quality of the visual base is judged according to the impact resistance index.

6. The impact test method for a new type of 10kV pole-mounted vacuum circuit breaker visual base according to claim 5 is characterized in that: The step of judging the impact resistance quality of the visual base according to the impact resistance index comprises: When the impact resistance index is greater than the preset qualified threshold, the impact resistance quality of the visible base of the pole-mounted vacuum circuit breaker is qualified; when the impact resistance index is less than or equal to the preset qualified threshold, the impact resistance quality of the visible base of the pole-mounted vacuum circuit breaker is unqualified.

7. The impact test method for a new type of 10kV pole-mounted vacuum circuit breaker visual base according to claim 1 is characterized in that: The impact energy of each impact test is equal to that of its control impact test, the test sequence of the control impact test is located before the test of each impact test, and the control impact test is in a normal test.

8. The impact test method for a new type of 10kV pole-mounted vacuum circuit breaker visual base according to claim 2 is characterized in that: The step of obtaining the fluctuation-specific index of each impact test according to the difference between the local difference index and the vibration characteristic index of each impact test and the control impact test comprises: Select one impact test from the normal tests except the first normal test as the target test, and obtain the initial specific index of the target test and each of the control impact tests according to the difference between the local difference index and the vibration characteristic index of the target test and each of the control impact tests; Record the mean of the initial specific index of the target test and all its control impact tests as the comprehensive specific index of the target test; obtain the discrete index of the initial specific index of the target test and all its control impact tests; According to the comprehensive specific index and the discrete index, the fluctuation specific index of the target test is obtained.

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