Analysis and Measurement System and Method for the Mechanical Strength of Instrument Transformers

Abstract

This application provides a system and method for analyzing and measuring the mechanical strength of a current transformer, relating to the field of electrical equipment mechanical performance testing technology. The main controller controls the load output end of a tension testing machine to output a load to a pulling member, thereby driving the clamping member to pull the load-bearing terminal of the current transformer; and receives multiple first distance data points with temporal relationships relative to a measuring plate, collected by a distance sensor at a preset sampling frequency; after a first preset time period, the load output end of the tension testing machine stops outputting a load to the pulling member, so that the clamping member stops pulling the load-bearing terminal of the current transformer; the system receives multiple second distance data points with temporal relationships relative to the measuring plate, collected by the distance sensor at a preset sampling frequency within a second preset time period; based on the multiple first distance data points with temporal relationships and the multiple second distance data points with temporal relationships, the system determines whether there is an abnormality in the mechanical strength of the load-bearing terminal of the current transformer, reducing errors caused by manual measurement and achieving high accuracy.

Description

Technical Field

[0001] This application relates to the field of electrical equipment mechanical performance testing technology, and in particular to an analysis and measurement system and method for the mechanical strength of a current transformer. Background Technology

[0002] Instrument transformers are primarily used in conjunction with electrical instruments to measure the current, voltage, and electrical energy of lines and equipment. They also work with relay protection and automatic devices to provide overcurrent, overvoltage, overload, and single-phase grounding protection for power systems and equipment. The load-bearing terminals of instrument transformers typically bear the weight of the cables, and their mechanical strength directly affects operational stability and safety. Therefore, it is necessary to measure the mechanical strength of the load-bearing terminals of instrument transformers.

[0003] Currently, the mechanical strength of the load-bearing terminals of current transformers is usually measured manually, which is inaccurate and wastes manpower. Summary of the Invention

[0004] This application provides a system and method for analyzing and measuring the mechanical strength of a current transformer, which solves the problems of low accuracy and wasted manpower in the measurement of the mechanical strength of the load-bearing terminals of current transformers in the prior art.

[0005] In a first aspect, this application provides a system for analyzing and measuring the mechanical strength of a current transformer, including a control panel, a measuring plate, a clamp, a tension member, a tensile testing machine, a position adjustment assembly, a bracket, a distance sensor, and a main controller. The clamp is held in place by the load-bearing terminal of the current transformer, and the measuring plate abuts against the load-bearing terminal of the current transformer. The clamp, the tension member, and the load output terminal of the tensile testing machine are connected in sequence. The distance sensor is mounted on the bracket, and the bracket is mounted on the position adjustment assembly. The main controller is electrically connected to the control panel, the tensile testing machine, the position adjustment assembly, and the distance sensor.

[0006] The main controller is used to respond to measurement commands input by the user from the control panel, and control the pose adjustment assembly to adjust the distance sensor mounted on the bracket to the specified pose so that the distance sensor is facing the measurement board.

[0007] The main controller is also used to control the load output end of the tensile testing machine to output load to the traction component, so as to drive the clamp to pull the load-bearing terminal of the current transformer; and to receive multiple first distance data with a time sequence relationship relative to the measuring plate collected by the distance sensor at a preset sampling frequency;

[0008] The main controller is also used to control the load output end of the tensioning machine to stop outputting load to the tensioning member after a first preset time period, so that the clamping member stops pulling the load-bearing terminal of the current transformer;

[0009] The main controller is also used to receive multiple second distance data that are temporally related relative to the measuring board, collected by the distance sensor at a preset sampling frequency within a second preset time period;

[0010] The main controller is also used to determine whether there is an abnormality in the mechanical strength of the load-bearing terminals of the current transformer based on multiple first distance data with time-series relationships and multiple second distance data with time-series relationships; if there is an abnormality in the mechanical strength, it outputs a prompt message indicating that there is an abnormality in the mechanical strength to the control panel display.

[0011] In some implementations, the main controller is specifically used to determine the displacement stretching difference between the average value of the last N first distance data and the average value of the first N first distance data in a plurality of first distance data with a temporal relationship, to determine the displacement rebound difference between the average value of the first N second distance data and the average value of the last N second distance data in a plurality of second distance data with a temporal relationship, and to determine whether the difference in the change amplitude between two adjacent first distance data in a plurality of first distance data with a temporal relationship is greater than a preset difference threshold, where N is an integer greater than or equal to 3;

[0012] If the displacement-tensile difference is greater than the set displacement-tensile threshold, the displacement-springback difference is less than the set displacement-springback threshold, and the difference in variation amplitude is greater than the preset difference threshold, it is determined that the mechanical strength of the load-bearing terminal of the current transformer is abnormal.

[0013] In some implementations, the main controller is specifically used for

[0014] The displacement stretching difference between the average of the last N first distance data points and the average of the first N first distance data points in a series of first distance data points with temporal relationships, and the displacement rebound difference between the average of the first N second distance data points and the average of the last N second distance data points in a series of second distance data points with temporal relationships, the slope of a first straight line obtained by fitting multiple first distance data points with temporal relationships, the slope of a second straight line obtained by fitting multiple second distance data points with temporal relationships, a first normal distribution of multiple first distance data points with temporal relationships, and a second normal distribution of multiple second distance data points with temporal relationships;

[0015] The displacement-tension difference, displacement-rebound difference, slope of the first straight line, slope of the second straight line, first normal distribution, and second normal distribution are input into a pre-trained mechanical strength anomaly identification model to determine whether there is an anomaly in the mechanical strength of the load-bearing terminal of the current transformer. The mechanical strength anomaly identification model is trained by inputting multiple training samples into the neural network to be trained. Each training sample includes historical displacement-tension difference, historical displacement-rebound difference, slope of the historical first straight line, slope of the historical second straight line, historical first normal distribution, historical second normal distribution, and corresponding label. The label is used to indicate whether there is an anomaly in the mechanical strength of the load-bearing terminal of the current transformer in the past.

[0016] In some embodiments, the pose adjustment assembly includes a first drive module, a second drive module, a third drive module, a lifting platform, a rotating platform, and a displacement platform. The first drive module is connected to the lifting platform, the second drive module is connected to the rotating platform, and the third drive module is connected to the displacement platform. A bracket equipped with a distance sensor is mounted on the displacement platform. The displacement platform is slidably connected to the rotating platform, and the rotating platform is rotatably connected to the lifting platform. The main controller is specifically used to control the first drive module to drive the lifting platform to rise and fall vertically by a preset angle, thereby causing the rotating platform, the displacement platform, and the bracket equipped with the distance sensor to rise and fall vertically; to control the second drive module to drive the rotating platform to rotate horizontally by a preset angle, thereby causing the displacement platform and the bracket equipped with the distance sensor to rotate horizontally; and to control the third drive module to drive the displacement platform to slide along the rotating platform by a preset distance, thereby causing the bracket equipped with the distance sensor to slide horizontally so that the distance sensor is facing the measuring plate.

[0017] In some implementations, the distance sensor is a laser sensor.

[0018] In some implementations, the system also includes a communication port, through which the main controller transmits a prompt message indicating an abnormality in mechanical strength to a terminal device for display.

[0019] Secondly, this application provides a method for analyzing and measuring the mechanical strength of a current transformer, applied to a system for analyzing and measuring the mechanical strength of a current transformer. The system includes a control panel, a measuring plate, a clamp, a tensioning component, a tension testing machine, a position adjustment assembly, a bracket, a distance sensor, and a main controller. The clamp is held against the load-bearing terminal of the current transformer, and the measuring plate abuts against the load-bearing terminal of the current transformer. The clamp, the tensioning component, and the load output terminal of the tension testing machine are connected sequentially. The distance sensor is mounted on the bracket, and the bracket is mounted on the position adjustment assembly. The main controller is electrically connected to the control panel, the tension testing machine, the position adjustment assembly, and the distance sensor. The method includes:

[0020] The main controller responds to the measurement command input by the user from the control panel and controls the posture adjustment assembly to adjust the distance sensor mounted on the bracket to the specified posture so that the distance sensor is facing the measurement plate.

[0021] The load output end of the control tensioning machine outputs a load to the tensioning member to drive the clamping member to pull the load-bearing terminal of the current transformer; and receives multiple first distance data with a time sequence relationship relative to the measuring plate collected by the distance sensor at a preset sampling frequency;

[0022] After the first preset time, the load output end of the control tensioning machine stops outputting load to the pulling component, so that the clamp stops pulling the load-bearing terminal of the current transformer;

[0023] The receiving distance sensor collects multiple second distance data that are temporally related relative to the measuring board within a second preset time period at a preset sampling frequency;

[0024] Based on multiple first distance data and multiple second distance data with time-series relationships, determine whether there is an abnormality in the mechanical strength of the load-bearing terminals of the current transformer; if there is an abnormality in the mechanical strength, output a prompt message indicating the abnormality in the mechanical strength to the control panel display.

[0025] In some implementations, determining whether there is an abnormality in the mechanical strength of the load-bearing terminals of the current transformer based on multiple first distance data points with temporal relationships and multiple second distance data points with temporal relationships includes:

[0026] The method involves determining the displacement stretching difference between the average value of the last N first distance data points and the average value of the first N first distance data points in a set of time-series data points; determining the displacement rebound difference between the average value of the first N second distance data points and the average value of the last N second distance data points in a set of time-series data points; and determining whether the difference in the change amplitude between two adjacent first distance data points in a set of time-series data points is greater than a preset difference threshold, where N is an integer greater than or equal to 3.

[0027] If the displacement-tensile difference is greater than the set displacement-tensile threshold, the displacement-springback difference is less than the set displacement-springback threshold, and the difference in variation amplitude is greater than the preset difference threshold, it is determined that the mechanical strength of the load-bearing terminal of the current transformer is abnormal.

[0028] In some implementations, determining whether there is an abnormality in the mechanical strength of the load-bearing terminals of the current transformer based on multiple first distance data points with temporal relationships and multiple second distance data points with temporal relationships includes:

[0029] The displacement stretching difference between the average of the last N first distance data points and the average of the first N first distance data points in a series of first distance data points with temporal relationships, and the displacement rebound difference between the average of the first N second distance data points and the average of the last N second distance data points in a series of second distance data points with temporal relationships, the slope of a first straight line obtained by fitting multiple first distance data points with temporal relationships, the slope of a second straight line obtained by fitting multiple second distance data points with temporal relationships, a first normal distribution of multiple first distance data points with temporal relationships, and a second normal distribution of multiple second distance data points with temporal relationships;

[0030] The displacement-tension difference, displacement-rebound difference, slope of the first straight line, slope of the second straight line, first normal distribution, and second normal distribution are input into a pre-trained mechanical strength anomaly identification model to determine whether there is an anomaly in the mechanical strength of the load-bearing terminal of the current transformer. The mechanical strength anomaly identification model is trained by inputting multiple training samples into the neural network to be trained. Each training sample includes historical displacement-tension difference, historical displacement-rebound difference, slope of the historical first straight line, slope of the historical second straight line, historical first normal distribution, historical second normal distribution, and corresponding label. The label is used to indicate whether there is an anomaly in the mechanical strength of the load-bearing terminal of the current transformer in the past.

[0031] In some embodiments, the pose adjustment assembly includes a first drive module, a second drive module, a third drive module, a lifting platform, a rotating platform, and a displacement platform. The first drive module is connected to the lifting platform, the second drive module is connected to the rotating platform, the third drive module is connected to the displacement platform, a bracket equipped with a distance sensor is mounted on the displacement platform, the displacement platform is slidably connected to the rotating platform, and the rotating platform is rotatably connected to the lifting platform.

[0032] The control pose adjustment assembly drives the distance sensor mounted on the bracket to adjust to the specified pose, including:

[0033] The first drive module controls the lifting platform to rise and fall vertically by a preset angle, thereby causing the rotating platform, the displacement platform, and the bracket equipped with the distance sensor to rise and fall vertically. The second drive module controls the rotating platform to rotate horizontally by a preset angle, thereby causing the displacement platform and the bracket equipped with the distance sensor to rotate horizontally. The third drive module controls the displacement platform to slide along the rotating platform by a preset distance, thereby causing the bracket equipped with the distance sensor to slide horizontally so that the distance sensor is directly facing the measuring plate.

[0034] This application provides a system and method for analyzing and measuring the mechanical strength of a current transformer. The system controls a position adjustment assembly to adjust a distance sensor mounted on a bracket to a specified position, ensuring the distance sensor faces a measuring plate. It controls the load output of a tension testing machine to output a load to a pulling member, causing a clamp to pull the load-bearing terminal of the current transformer. The system also receives multiple time-sequential distance data collected by the distance sensor at a preset sampling frequency relative to the measuring plate. After a first preset time period, the system stops the load output of the tension testing machine to stop outputting a load to the pulling member, causing the clamp to stop pulling the load-bearing terminal of the current transformer. Furthermore, the system receives multiple time-sequential distance data collected by the distance sensor at a preset sampling frequency relative to the measuring plate within a second preset time period. Based on the multiple time-sequential first and second distance data, the system determines whether the mechanical strength of the load-bearing terminal of the current transformer is abnormal. If an abnormality is found, a prompt indicating the abnormality is displayed on the control panel. This automated method determines whether the mechanical strength of the load-bearing terminal of the current transformer is abnormal, saving labor costs, reducing errors from manual measurement, and achieving high accuracy. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the structure of the analysis and measurement system for the mechanical strength of the current transformer provided in the embodiments of this application;

[0037] Figure 2 A flowchart illustrating the method for analyzing and measuring the mechanical strength of a current transformer provided in this application embodiment. Detailed Implementation

[0038] Embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0039] The accompanying drawings illustrate various structural schematics according to embodiments of the present disclosure. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0040] In the context of this disclosure, when a layer / element is referred to as being "above" another layer / element, the layer / element may be directly above the other layer / element, or there may be an intermediate layer / element between them. Additionally, if a layer / element is "above" another layer / element in one orientation, then when the orientation is reversed, the layer / element may be "below" the other layer / element.

[0041] The technical solutions of this application and how they solve the aforementioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0042] Please see Figure 1 This application provides a system for analyzing and measuring the mechanical strength of a current transformer, including a control panel 18, a measuring plate 6, a clamp 3, a pulling member 4, a tensioning machine 5, a position adjustment assembly, a bracket 7, a distance sensor 8, and a main controller 14. The clamp 3 is held in place by the load-bearing terminal 2 of the current transformer 1, and the measuring plate 6 abuts against the load-bearing terminal 2 of the current transformer 1. The clamp 3, the pulling member 4, and the load output end of the tensioning machine 5 are connected in sequence. For example, the measuring plate 6 can be a rectangular plate with a flat surface. The pulling member 4 can include a pulley and a pulling rope that drives the sliding and rolling motion. One end of the pulling rope is connected to the clamp 3, and the other end is connected to the tensioning machine 5. The control panel 18 can be, but is not limited to, a touch screen. The distance sensor 8 is mounted on the bracket 7, and the bracket 7 is mounted on the position adjustment assembly. The main controller 14 is electrically connected to the control panel 18, the tensioning machine 5, the position adjustment assembly, and the distance sensor 8.

[0043] The main controller 14, in response to measurement commands input by the user from the control panel 18, controls the posture adjustment assembly to adjust the distance sensor 8 mounted on the bracket 7 to a specified posture, so that the distance sensor 8 is directly facing the measuring plate 6. Understandably, the distance sensor 8 can measure the distance relative to the measuring plate 6. Since the measuring plate 6 abuts against the load-bearing terminal 2 of the current transformer 1, the deformation of the load-bearing terminal 2 of the current transformer 1 can be determined by measuring the change in the distance of the measuring plate 6, thereby determining whether there is an abnormality in the mechanical strength of the load-bearing terminal 2 of the current transformer 1.

[0044] For example, the distance sensor 8 can be, but is not limited to, a laser sensor 8. In some embodiments, it is still as follows Figure 1 As shown, the pose adjustment assembly includes a first drive module 15, a second drive module 16, a third drive module 17, a lifting platform 9, a rotating platform 10, and a displacement platform 11. The first drive module 15 is connected to the lifting platform 9, the second drive module 16 is connected to the rotating platform 10, and the third drive module 17 is connected to the displacement platform 11. A bracket 7 equipped with a distance sensor 8 is mounted on the displacement platform 11. The displacement platform 11 is slidably connected to the rotating platform 10, and the rotating platform 10 is rotatably connected to the lifting platform 9.

[0045] The main controller 14 is specifically used to control the first drive module 15 to drive the lifting platform 9 to rise and fall vertically by a preset angle, so as to drive the rotating platform 10, the displacement platform 11 and the bracket 7 with the distance sensor 8 to rise and fall vertically; to control the second drive module 16 to drive the rotating platform 10 to rotate horizontally by a preset angle, so as to drive the displacement platform 11 and the bracket 7 with the distance sensor 8 to rotate horizontally; and to control the third drive module 17 to drive the displacement platform 11 to slide along the rotating platform 10 by a preset distance, so as to drive the bracket 7 with the distance sensor 8 to slide horizontally (e.g., the moving platform includes a guide rail 12 and a slider 13, the bracket 7 is connected to one side of the slider 13, the other side of the slider 13 is slidably connected to the guide rail 12, and one end of the guide rail 12 is connected to the rotating platform 10), so that the distance sensor 8 is facing the measuring plate 6.

[0046] The main controller 14 is also used to control the load output end of the tension machine 5 to output load to the tension member 4 so as to drive the clamp 3 to pull the load-bearing terminal 2 of the current transformer 1; and to receive the first distance data relative to the measuring plate 6 collected by the distance sensor 8 at a preset sampling frequency, which has a time sequence relationship.

[0047] For example, the output load range can be 2000N-5000N, and is not limited here. Understandably, when a load is applied to the load-bearing terminal 2 of the current transformer 1, the load-bearing terminal 2 of the current transformer 1 may deform, thereby causing a change in the distance between the measuring plate 6 and the distance sensor 8.

[0048] The main controller 14 is also used to control the load output end of the tensioning machine 5 to stop outputting load to the tensioning member 4 after a first preset time period, so that the clamping member 3 stops pulling the load-bearing terminal 2 of the current transformer 1.

[0049] The main controller 14 is also used to receive multiple second distance data relative to the measuring board 6 that have a temporal relationship, collected by the distance sensor 8 at a preset sampling frequency within a second preset time period.

[0050] For example, the second preset duration can be 10s, 15s, or 20s. Understandably, after the tension on the load-bearing terminal 2 of the current transformer 1 is stopped, the deformation of the load-bearing terminal 2 of the current transformer 1 may rebound, thereby causing a change in the distance between the measuring plate 6 and the distance sensor 8.

[0051] The main controller 14 is also used to determine whether there is an abnormality in the mechanical strength of the load-bearing terminal 2 of the current transformer 1 based on multiple first distance data with time-series relationships and multiple second distance data with time-series relationships.

[0052] In some implementations, the main controller 14 is specifically used to determine the displacement stretching difference between the average value of the last N first distance data and the average value of the first N first distance data in a plurality of first distance data with a temporal relationship, to determine the displacement rebound difference between the average value of the first N second distance data and the average value of the last N second distance data in a plurality of second distance data with a temporal relationship, and to determine whether the difference in the change amplitude of two adjacent first distance data in a plurality of first distance data with a temporal relationship is greater than a preset difference threshold, where N is an integer greater than or equal to 3 (for example, N can be equal to 3, 4, or 5); if the displacement stretching difference is greater than the set displacement stretching threshold, the displacement rebound difference is less than the set displacement rebound threshold, and the change amplitude difference is greater than the preset difference threshold, it is determined that the mechanical strength of the load-bearing terminal 2 of the current transformer 1 is abnormal, with high accuracy and reliability.

[0053] In other embodiments, the main controller 14 is specifically used to determine the displacement stretching difference between the average value of the last N first distance data and the average value of the first N first distance data in a plurality of first distance data with temporal relationships, and to determine the displacement rebound difference between the average value of the first N second distance data and the average value of the last N second distance data in a plurality of second distance data with temporal relationships, the slope of a first straight line obtained by fitting a plurality of first distance data with temporal relationships, the slope of a second straight line obtained by fitting a plurality of second distance data with temporal relationships, a first normal distribution of a plurality of first distance data with temporal relationships, and a second normal distribution of a plurality of second distance data with temporal relationships, where N is an integer greater than or equal to 3 (for example, N can be equal to 3, 4, or 5); and input the displacement stretching difference, displacement rebound difference, slope of the first straight line, slope of the second straight line, first normal distribution, and second normal distribution into a pre-trained mechanical strength anomaly identification model to determine whether there is an anomaly in the mechanical strength of the load-bearing terminal 2 of the current transformer 1, with high accuracy and reliability.

[0054] Among them, the mechanical strength anomaly identification model is trained by inputting multiple training samples into the neural network to be trained. Each training sample includes historical displacement tensile difference, historical displacement springback difference, slope of historical first straight line, slope of historical second straight line, historical first normal distribution, historical second normal distribution and corresponding label. The label is used to indicate whether there is an anomaly in the mechanical strength of the load-bearing terminal 2 of the historical transformer 1.

[0055] The main controller 14 is also used to output a prompt message indicating an abnormality in mechanical strength to the control panel 18 for display by the tester in the event of an abnormality in mechanical strength.

[0056] In some implementations, the system also includes a communication port, through which the main controller 14 transmits a prompt message indicating an abnormality in mechanical strength to a terminal device for display by test personnel.

[0057] In addition, this application provides a method for analyzing and measuring the mechanical strength of a current transformer, which is applied to a system for analyzing and measuring the mechanical strength of a current transformer. It should be noted that the basic principle and technical effects of the method for analyzing and measuring the mechanical strength of a current transformer provided in this application are the same as those in the above embodiments. For the sake of brevity, any parts not mentioned in this application can be referred to the corresponding content in the above embodiments.

[0058] Still Figure 1As shown, the system includes a control panel 18, a measuring plate 6, a clamp 3, a pulling component 4, a tensioning machine 5, a position adjustment assembly, a bracket 7, a distance sensor 8, and a main controller 14. The clamp 3 is clamped to the load-bearing terminal 2 of the current transformer 1, and the measuring plate 6 abuts against the load-bearing terminal 2 of the current transformer 1. The clamp 3, the pulling component 4, and the load output terminals of the tensioning machine 5 are connected in sequence. The distance sensor 8 is mounted on the bracket 7, and the bracket 7 is mounted on the position adjustment assembly. The main controller 14 is electrically connected to the control panel 18, the tensioning machine 5, the position adjustment assembly, and the distance sensor 8. Figure 2 As shown, the method provided in this application embodiment includes:

[0059] S201: In response to a measurement command input by the user from the control panel 18, the main controller 14 controls the pose adjustment assembly to adjust the distance sensor 8 mounted on the bracket 7 to a specified pose so that the distance sensor 8 is facing the measuring plate 6.

[0060] Specifically, such as Figure 1 As shown, the pose adjustment assembly includes a first drive module 15, a second drive module 16, a third drive module 17, a lifting platform 9, a rotating platform 10, and a displacement platform 11. The first drive module 15 is connected to the lifting platform 9, the second drive module 16 is connected to the rotating platform 10, and the third drive module 17 is connected to the displacement platform 11. A bracket 7 equipped with a distance sensor 8 is mounted on the displacement platform 11. The displacement platform 11 is slidably connected to the rotating platform 10, and the rotating platform 10 is rotatably connected to the lifting platform 9.

[0061] S201 can be specifically implemented as follows: controlling the first drive module 15 to drive the lifting platform 9 to rise and fall a preset angle in the vertical direction, so as to drive the rotating platform 10, the displacement platform 11 and the bracket 7 with the distance sensor 8 to rise and fall in the vertical direction; controlling the second drive module 16 to drive the rotating platform 10 to rotate a preset angle around the horizontal direction, so as to drive the displacement platform 11 and the bracket 7 with the distance sensor 8 to rotate around the horizontal direction; and controlling the third drive module 17 to drive the displacement platform 11 to slide a preset distance along the rotating platform 10, so as to drive the bracket 7 with the distance sensor 8 to slide in the horizontal direction, so that the distance sensor 8 is facing the measuring plate 6.

[0062] S202: Control the load output end of the tensioning machine 5 to output load to the tensioning member 4, so as to drive the clamp 3 to pull the load-bearing terminal 2 of the current transformer 1; and receive the first distance data with a time sequence relationship relative to the measuring plate 6 collected by the distance sensor 8 at a preset sampling frequency.

[0063] S203: After the first preset time, the load output end of the control tensioning machine 5 stops outputting load to the tensioning member 4, so that the clamping member 3 stops pulling the load-bearing terminal 2 of the current transformer 1.

[0064] S204: Receive distance data from distance sensor 8 within a second preset time period at a preset sampling frequency, which are multiple second distance data with temporal relationships relative to measuring board 6.

[0065] S205: Based on multiple first distance data with time-series relationships and multiple second distance data with time-series relationships, determine whether there is an abnormality in the mechanical strength of the load-bearing terminal 2 of the current transformer 1.

[0066] Specifically, the implementation of S205 includes, but is not limited to, the following two:

[0067] The first method involves determining the displacement stretching difference between the average of the last N first distance data points and the average of the first N first distance data points in a series of time-series data points; determining the displacement rebound difference between the average of the first N second distance data points and the average of the last N second distance data points in a series of time-series data points; and determining whether the difference in the variation amplitude between two adjacent first distance data points in a series of time-series data points is greater than a preset difference threshold, where N is an integer greater than or equal to 3. If the displacement stretching difference is greater than the set displacement stretching threshold, the displacement rebound difference is less than the set displacement rebound threshold, and the variation amplitude difference is greater than the preset difference threshold, it is determined that the mechanical strength of the load-bearing terminal 2 of the current transformer 1 is abnormal.

[0068] The second method involves determining the displacement stretching difference between the average of the last N first distance data points and the average of the first N first distance data points in a series of time-series data points, and the displacement rebound difference between the average of the first N second distance data points and the average of the last N second distance data points in a series of time-series data points. It also involves determining the slope of a first straight line obtained by fitting multiple first distance data points with time-series relationships, the slope of a second straight line obtained by fitting multiple second distance data points with time-series relationships, the first normal distribution of multiple first distance data points with time-series relationships, and the second normal distribution of multiple second distance data points with time-series relationships. The displacement stretching difference, displacement rebound difference, the slope of the first straight line, the slope of the second straight line, the first normal distribution, and the second normal distribution are then input into a pre-trained mechanical strength anomaly identification model to determine whether there is an anomaly in the mechanical strength of the load-bearing terminal 2 of the current transformer 1.

[0069] Among them, the mechanical strength anomaly identification model is trained by inputting multiple training samples into the neural network to be trained. Each training sample includes historical displacement tensile difference, historical displacement springback difference, slope of historical first straight line, slope of historical second straight line, historical first normal distribution, historical second normal distribution and corresponding label. The label is used to indicate whether there is an anomaly in the mechanical strength of the load-bearing terminal 2 of the historical transformer 1.

[0070] S206: In the event of an abnormality in mechanical strength, output a prompt message indicating the abnormality in mechanical strength to the control panel 18 for display.

[0071] In summary, the mechanical strength analysis and measurement system and method of a current transformer provided in this application embodiment can control the posture adjustment assembly to adjust the distance sensor 8 mounted on the bracket 7 to a specified posture so that the distance sensor 8 faces the measuring plate 6; control the load output end of the tension machine 5 to output load to the pulling member 4 to drive the clamp 3 to pull the load-bearing terminal 2 of the current transformer 1; and receive multiple first distance data with temporal relationship relative to the measuring plate 6 collected by the distance sensor 8 at a preset sampling frequency; after a first preset time period, control the load output end of the tension machine 5 to stop outputting load to the pulling member 4 so that the clamp 3 stops pulling the load-bearing terminal 2 of the current transformer 1; receive multiple second distance data with temporal relationship relative to the measuring plate 6 collected by the distance sensor 8 at a preset sampling frequency within a second preset time period; determine whether there is an abnormality in the mechanical strength of the load-bearing terminal 2 of the current transformer 1 based on the multiple first distance data with temporal relationship and the multiple second distance data with temporal relationship; and output a prompt message indicating that there is an abnormality in the mechanical strength to the control panel 18 for display when there is an abnormality in the mechanical strength. In this way, it is possible to automatically determine whether there is any abnormality in the mechanical strength of the load-bearing terminal 2 of the current transformer 1, saving labor costs, reducing errors caused by manual measurement, and achieving high accuracy.

[0072] The above description does not provide detailed technical specifications regarding the structure of each layer. However, those skilled in the art should understand that layers and regions of desired shapes can be formed using various technical means. Furthermore, to form the same structure, those skilled in the art can also design methods that are not entirely identical to those described above. Additionally, although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be advantageously combined.

[0073] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0074] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A system for analyzing and measuring the mechanical strength of a current transformer, characterized in that, The device includes a control panel, a measuring plate, a clamp, a traction component, a tensile testing machine, a position adjustment assembly, a bracket, a distance sensor, and a main controller. The clamp holds the load-bearing terminal of the current transformer, and the measuring plate abuts against the load-bearing terminal of the current transformer. The clamp, the traction component, and the load output terminal of the tensile testing machine are connected in sequence. The distance sensor is mounted on the bracket, and the bracket is mounted on the position adjustment assembly. The main controller is electrically connected to the control panel, the tensile testing machine, the position adjustment assembly, and the distance sensor. The main controller is used to respond to measurement commands input by the user from the control panel, and control the pose adjustment assembly to adjust the distance sensor mounted on the bracket to a specified pose so that the distance sensor is facing the measurement plate. The main controller is also used to control the load output end of the tensile testing machine to output a load to the pulling member, so as to drive the clamp to pull the load-bearing terminal of the current transformer; and to receive multiple first distance data with a time sequence relationship relative to the measuring plate collected by the distance sensor at a preset sampling frequency; The main controller is also used to control the load output end of the tension machine to stop outputting load to the tension member after a first preset time period, so that the clamp stops pulling the load-bearing terminal of the current transformer; The main controller is also used to receive multiple second distance data that are temporally related to the measuring plate, collected by the distance sensor at a preset sampling frequency within a second preset time period; The main controller is also used to determine whether there is an abnormality in the mechanical strength of the load-bearing terminals of the current transformer based on the plurality of first distance data with time-series relationships and the plurality of second distance data with time-series relationships; If the mechanical strength is abnormal, a prompt message indicating the abnormality will be output to the control panel display.

2. The system according to claim 1, characterized in that, The main controller is specifically used to determine the displacement stretching difference between the average value of the last N first distance data and the average value of the first N first distance data in the plurality of first distance data with temporal relationship, to determine the displacement rebound difference between the average value of the first N second distance data and the average value of the last N second distance data in the plurality of second distance data with temporal relationship, and to determine whether the difference in the change amplitude between two adjacent first distance data in the plurality of first distance data with temporal relationship is greater than a preset difference threshold, where N is an integer greater than or equal to 3; If the displacement-tension difference is greater than a set displacement-tension threshold, the displacement-rebound difference is less than a set displacement-rebound threshold, and the change amplitude difference is greater than a preset difference threshold, it is determined that the mechanical strength of the load-bearing terminal of the current transformer is abnormal.

3. The system according to claim 1, characterized in that, The main controller is specifically used for The method includes determining the displacement stretching difference between the average value of the last N first distance data points and the average value of the first N first distance data points in the plurality of first distance data points with temporal relationships, and determining the displacement rebound difference between the average value of the first N second distance data points and the average value of the last N second distance data points in the plurality of second distance data points with temporal relationships, the slope of a first straight line obtained by fitting the plurality of first distance data points with temporal relationships, the slope of a second straight line obtained by fitting the plurality of second distance data points with temporal relationships, the first normal distribution of the plurality of first distance data points with temporal relationships, and the second normal distribution of the plurality of second distance data points with temporal relationships. The displacement-tension difference, displacement-rebound difference, slope of the first straight line, slope of the second straight line, first normal distribution, and second normal distribution are input into a pre-trained mechanical strength anomaly identification model to determine whether there is an anomaly in the mechanical strength of the load-bearing terminal of the current transformer. The mechanical strength anomaly identification model is trained by inputting multiple training samples into a neural network to be trained. Each training sample includes historical displacement-tension difference, historical displacement-rebound difference, slope of the historical first straight line, slope of the historical second straight line, historical first normal distribution, historical second normal distribution, and a corresponding label. The label is used to indicate whether there is an anomaly in the mechanical strength of the load-bearing terminal of the current transformer in the past.

4. The system according to claim 1, characterized in that, The pose adjustment assembly includes a first drive module, a second drive module, a third drive module, a lifting platform, a rotating platform, and a displacement platform. The first drive module is connected to the lifting platform, the second drive module is connected to the rotating platform, and the third drive module is connected to the displacement platform. A bracket with the distance sensor is mounted on the displacement platform. The displacement platform is slidably connected to the rotating platform, and the rotating platform is rotatably connected to the lifting platform. The main controller is specifically used to control the first drive module to drive the lifting platform to rise and fall vertically by a preset angle, thereby causing the rotating platform, the displacement platform, and the bracket with the distance sensor to rise and fall vertically; to control the second drive module to drive the rotating platform to rotate horizontally by a preset angle, thereby causing the displacement platform and the bracket with the distance sensor to rotate horizontally; and to control the third drive module to drive the displacement platform to slide along the rotating platform by a preset distance, thereby causing the bracket with the distance sensor to slide horizontally so that the distance sensor is facing the measuring plate.

5. The system according to claim 1, characterized in that, The distance sensor is a laser sensor.

6. The system according to claim 1, characterized in that, The system also includes a communication port, and the main controller is further configured to transmit the prompt information indicating an abnormality in the mechanical strength to a terminal device for display via the communication port.

7. A method for analyzing and measuring the mechanical strength of a current transformer, characterized in that, A system for analyzing and measuring the mechanical strength of a current transformer, the system comprising a control panel, a measuring plate, a clamp, a tensioning component, a tensile testing machine, a position adjustment assembly, a bracket, a distance sensor, and a main controller. The clamp holds the load-bearing terminal of the current transformer, the measuring plate abuts against the load-bearing terminal of the current transformer, the clamp, the tensioning component, and the load output terminal of the tensile testing machine are connected sequentially, the distance sensor is mounted on the bracket, the bracket is mounted on the position adjustment assembly, and the main controller is electrically connected to the control panel, the tensile testing machine, the position adjustment assembly, and the distance sensor. The method includes: The main controller responds to a measurement command input by the user from the control panel and controls the pose adjustment assembly to adjust the distance sensor mounted on the bracket to a specified pose so that the distance sensor is facing the measurement plate. The load output end of the tension testing machine is controlled to output a load to the pulling member, so as to drive the clamp to pull the load-bearing terminal of the current transformer; and the distance sensor is received to collect multiple first distance data with a time sequence relationship relative to the measuring plate at a preset sampling frequency; After a first preset time period, the load output end of the tension machine is controlled to stop outputting load to the tension member, so that the clamp stops pulling the load-bearing terminal of the current transformer; Receive multiple second distance data that are temporally related to the measuring plate, collected by the distance sensor at a preset sampling frequency within a second preset time period; Based on the multiple first distance data and the multiple second distance data that have a time-series relationship, it is determined whether there is an abnormality in the mechanical strength of the load-bearing terminal of the current transformer; if there is an abnormality in the mechanical strength, a prompt message indicating that there is an abnormality in the mechanical strength is output to the control panel display.

8. The method according to claim 7, characterized in that, The step of determining whether there is an abnormality in the mechanical strength of the load-bearing terminals of the current transformer based on the plurality of first distance data with temporal relationships and the plurality of second distance data with temporal relationships includes: The method involves determining the displacement stretching difference between the average value of the last N first distance data points and the average value of the first N first distance data points in the plurality of first distance data points with temporal relationships, determining the displacement rebound difference between the average value of the first N second distance data points and the average value of the last N second distance data points in the plurality of second distance data points with temporal relationships, and determining whether the difference in the change amplitude between two adjacent first distance data points in the plurality of first distance data points with temporal relationships is greater than a preset difference threshold, where N is an integer greater than or equal to 3; If the displacement-tension difference is greater than a set displacement-tension threshold, the displacement-rebound difference is less than a set displacement-rebound threshold, and the change amplitude difference is greater than a preset difference threshold, it is determined that the mechanical strength of the load-bearing terminal of the current transformer is abnormal.

9. The method according to claim 7, characterized in that, The step of determining whether there is an abnormality in the mechanical strength of the load-bearing terminals of the current transformer based on the plurality of first distance data with temporal relationships and the plurality of second distance data with temporal relationships includes: The method includes determining the displacement stretching difference between the average value of the last N first distance data points and the average value of the first N first distance data points in the plurality of first distance data points with temporal relationships, and determining the displacement rebound difference between the average value of the first N second distance data points and the average value of the last N second distance data points in the plurality of second distance data points with temporal relationships, the slope of a first straight line obtained by fitting the plurality of first distance data points with temporal relationships, the slope of a second straight line obtained by fitting the plurality of second distance data points with temporal relationships, the first normal distribution of the plurality of first distance data points with temporal relationships, and the second normal distribution of the plurality of second distance data points with temporal relationships. The displacement-tension difference, displacement-rebound difference, slope of the first straight line, slope of the second straight line, first normal distribution, and second normal distribution are input into a pre-trained mechanical strength anomaly identification model to determine whether there is an anomaly in the mechanical strength of the load-bearing terminal of the current transformer. The mechanical strength anomaly identification model is trained by inputting multiple training samples into a neural network to be trained. Each training sample includes historical displacement-tension difference, historical displacement-rebound difference, slope of the historical first straight line, slope of the historical second straight line, historical first normal distribution, historical second normal distribution, and a corresponding label. The label is used to indicate whether there is an anomaly in the mechanical strength of the load-bearing terminal of the current transformer in the past.

10. The method according to claim 7, characterized in that, The pose adjustment assembly includes a first drive module, a second drive module, a third drive module, a lifting platform, a rotating platform, and a displacement platform. The first drive module is connected to the lifting platform, the second drive module is connected to the rotating platform, and the third drive module is connected to the displacement platform. A bracket equipped with the distance sensor is mounted on the displacement platform. The displacement platform is slidably connected to the rotating platform, and the rotating platform is rotatably connected to the lifting platform. The control of the pose adjustment assembly to drive the distance sensor mounted on the bracket to adjust to the specified pose includes: The system controls the first drive module to drive the lifting platform to rise and fall vertically by a preset angle, thereby causing the rotating platform, the displacement platform, and the bracket equipped with the distance sensor to rise and fall vertically; the system controls the second drive module to drive the rotating platform to rotate horizontally by a preset angle, thereby causing the displacement platform and the bracket equipped with the distance sensor to rotate horizontally; and the system controls the third drive module to drive the displacement platform to slide along the rotating platform by a preset distance, thereby causing the bracket equipped with the distance sensor to slide horizontally, so that the distance sensor is directly facing the measuring plate.

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