Running state monitoring method and device of cable crimping pipe, electronic equipment and storage medium

Abstract

The invention discloses an operation state monitoring method and device of a cable crimping pipe, electronic equipment and a storage medium, and belongs to the technical field of cable accessory crimping pipe monitoring, and the method comprises the steps: obtaining the temperature data and vibration acceleration data of the cable crimping pipe; calculating an inherent frequency and a vibration attenuation equivalent time constant corresponding to the cable crimping pipe according to the vibration acceleration data; comparing the temperature data with a preset temperature early warning threshold value, comparing the inherent frequency with a preset inherent frequency early warning threshold value, and comparing the vibration attenuation equivalent time constant with a preset vibration attenuation equivalent time constant early warning threshold value; according to the method and the device, the defect score corresponding to the cable crimping pipe is obtained according to each comparison result, and defect early warning is performed on the cable crimping pipe according to the defect score, so that the problems that a manual inspection method in the prior art is low in efficiency and potential problems are difficult to find in time can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable accessory compression tube monitoring, and in particular to a method, device, electronic equipment and storage medium for monitoring the operating status of a cable compression tube. Background Art

[0002] With the continuous development of power systems, cables are playing an increasingly important role in power transmission. Cable accessories, particularly cable crimping tubes, are key components for connecting cables, and their quality directly impacts the stability and safety of the entire power system. Cable crimping tubes are primarily used to connect the two ends of a cable, transmitting power between the two cable lines. However, in actual operation, cable crimping tubes may experience localized heating due to various reasons, such as poor crimping quality, loose tubes, material defects, and environmental factors.

[0003] Localized heating can cause the temperature of cable crimping tubes to rise, accelerating the aging of insulation materials and reducing their mechanical strength and electrical performance. This can ultimately lead to cable failures and even safety incidents. Statistics show that a significant portion of cable failures are caused by unstable connection accessories, and poor quality of cable crimping tubes is a significant contributing factor. Therefore, real-time monitoring and early warning of the operating status of cable crimping tubes are crucial for ensuring the safe operation of power systems.

[0004] Traditional methods for monitoring the operating status of cable compression tubes mainly rely on manual inspections and regular maintenance. This method is not only inefficient but also difficult to detect potential problems in a timely manner. Summary of the Invention

[0005] The present invention provides a method, device, electronic equipment and storage medium for monitoring the operating status of a cable compression tube, which can solve the problem that the manual inspection and regular maintenance methods in the prior art are not only inefficient but also difficult to detect potential problems in a timely manner.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a method for monitoring the operating status of a cable compression tube, comprising:

[0007] Obtain temperature data and vibration acceleration data of cable crimping tubes;

[0008] Calculating the natural frequency and vibration displacement corresponding to the cable compression tube according to the vibration acceleration data, and then calculating the vibration attenuation equivalent time constant corresponding to the cable compression tube according to the vibration displacement;

[0009] The temperature data is compared with a preset temperature warning threshold, the natural frequency is compared with a preset natural frequency warning threshold, and the vibration attenuation equivalent time constant is compared with a preset vibration attenuation equivalent time constant warning threshold. Then, a defect score corresponding to the cable crimping tube is obtained based on each comparison result, and a defect warning is issued for the cable crimping tube based on the defect score.

[0010] As a preferred solution, before calculating the natural frequency and vibration displacement corresponding to the cable crimping tube according to the vibration acceleration data, the method further includes:

[0011] The vibration acceleration data is preprocessed; wherein the data preprocessing includes: abnormal data deletion processing, duplicate data deletion processing, missing data repair processing and data noise reduction processing.

[0012] As a preferred solution, the calculation of the natural frequency and vibration displacement corresponding to the cable crimping tube according to the vibration acceleration data includes:

[0013] performing a fast Fourier transform on the vibration acceleration data;

[0014] Constructing a corresponding vibration acceleration frequency domain curve based on the result of fast Fourier transform, and then taking the frequency corresponding to the peak point in the vibration acceleration frequency domain curve as the natural frequency corresponding to the cable crimping tube;

[0015] The vibration acceleration data is processed by second-order frequency domain integration according to the result of fast Fourier transform, and the second-order integration result obtained by the second-order frequency domain integration is processed by inverse Fourier transform to obtain the vibration displacement corresponding to the cable compression tube.

[0016] As a preferred solution, the calculation of the vibration attenuation equivalent time constant corresponding to the cable crimping tube according to the vibration displacement includes:

[0017] Calculating the fitting amplitude corresponding to the maximum displacement point according to the maximum displacement point corresponding to the vibration displacement and a preset vibration attenuation function;

[0018] The residual square sum between the true amplitude of the displacement maximum point and the fitting amplitude is calculated, and then the vibration attenuation equivalent time constant corresponding to the cable compression tube is determined according to the residual square sum.

[0019] As a preferred solution, the temperature data is compared with a preset temperature warning threshold, the natural frequency is compared with a preset natural frequency warning threshold, and the vibration attenuation equivalent time constant is compared with a preset vibration attenuation equivalent time constant warning threshold, and then a defect score corresponding to the cable crimping tube is obtained according to each comparison result, and a defect warning is issued for the cable crimping tube according to the defect score, including:

[0020] Obtaining a first weight coefficient corresponding to the temperature data, a second weight coefficient corresponding to the natural frequency, and a third weight coefficient corresponding to the vibration attenuation equivalent time constant;

[0021] Comparing the temperature data with a preset temperature warning threshold to obtain a corresponding first comparison result, and obtaining a first defect score corresponding to the temperature data based on the first comparison result and the first weight coefficient;

[0022] Comparing the natural frequency with a preset natural frequency warning threshold to obtain a corresponding second comparison result, and obtaining a second defect score corresponding to the natural frequency based on the second comparison result and the second weight coefficient;

[0023] Comparing the vibration attenuation equivalent time constant with a preset vibration attenuation equivalent time constant warning threshold to obtain a corresponding third comparison result, and obtaining a third defect score corresponding to the vibration attenuation equivalent time constant based on the third comparison result and the third weight coefficient;

[0024] A total defect score corresponding to the cable crimping tube is obtained based on the first defect score, the second defect score, and the third defect score, and a defect warning is issued for the cable crimping tube based on the total defect score.

[0025] Based on the above embodiment, another embodiment of the present invention provides an operating status monitoring device for a cable compression tube, comprising: a data acquisition module, a vibration parameter calculation module, and a cable compression tube defect warning module;

[0026] The data acquisition module is used to acquire temperature data and vibration acceleration data of the cable crimping tube;

[0027] The vibration parameter calculation module is used to calculate the natural frequency and vibration displacement corresponding to the cable compression tube according to the vibration acceleration data, and then calculate the vibration attenuation equivalent time constant corresponding to the cable compression tube according to the vibration displacement;

[0028] The cable crimping tube defect warning module is used to compare the temperature data with a preset temperature warning threshold, compare the natural frequency with a preset natural frequency warning threshold, and compare the vibration attenuation equivalent time constant with a preset vibration attenuation equivalent time constant warning threshold, and then obtain a defect score corresponding to the cable crimping tube based on each comparison result, and perform a defect warning on the cable crimping tube based on the defect score.

[0029] As a preferred solution, the calculation of the natural frequency and vibration displacement corresponding to the cable crimping tube according to the vibration acceleration data includes:

[0030] performing a fast Fourier transform on the vibration acceleration data;

[0031] Constructing a corresponding vibration acceleration frequency domain curve based on the result of fast Fourier transform, and then taking the frequency corresponding to the peak point in the vibration acceleration frequency domain curve as the natural frequency corresponding to the cable crimping tube;

[0032] The vibration acceleration data is processed by second-order frequency domain integration according to the result of fast Fourier transform, and the second-order integration result obtained by the second-order frequency domain integration is processed by inverse Fourier transform to obtain the vibration displacement corresponding to the cable compression tube.

[0033] As a preferred solution, the calculation of the vibration attenuation equivalent time constant corresponding to the cable crimping tube according to the vibration displacement includes:

[0034] Calculating the fitting amplitude corresponding to the maximum displacement point according to the maximum displacement point corresponding to the vibration displacement and a preset vibration attenuation function;

[0035] The residual square sum between the true amplitude of the displacement maximum point and the fitting amplitude is calculated, and then the vibration attenuation equivalent time constant corresponding to the cable compression tube is determined according to the residual square sum.

[0036] Based on the above embodiments, another embodiment of the present invention provides an electronic device, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the operating status monitoring method of the cable crimping tube described in the above embodiment of the invention.

[0037] Based on the above embodiments, another embodiment of the present invention provides a storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the storage medium is located is controlled to execute the cable compression tube operation status monitoring method described in the above invention embodiment.

[0038] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0039] The present invention provides a method for monitoring the operating status of a cable compression tube. The method comprises obtaining temperature data and vibration acceleration data of the cable compression tube; calculating the natural frequency and vibration displacement corresponding to the cable compression tube based on the vibration acceleration data; and then calculating the vibration attenuation equivalent time constant corresponding to the cable compression tube based on the vibration displacement; comparing the temperature data with a preset temperature warning threshold, comparing the natural frequency with a preset natural frequency warning threshold, and comparing the vibration attenuation equivalent time constant with a preset vibration attenuation equivalent time constant warning threshold. Then, based on the comparison results, a defect score corresponding to the cable compression tube is obtained, and a defect warning is issued for the cable compression tube based on the defect score. Compared to manual inspection methods, the present invention obtains temperature data and vibration acceleration data of the cable compression tube, then automatically calculates the defect score corresponding to the cable compression tube based on the obtained temperature data and vibration acceleration data, and issues a defect warning for the cable compression tube based on the defect score. This method can automatically monitor the operating status of cable accessory compression tubes in real time, improve the efficiency of cable compression tube operating status monitoring, and has a high level of intelligence and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a flow chart of a method for monitoring the operating status of a cable compression tube provided by one embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the layout of temperature measurement points;

[0042] Figure 3 This is a schematic diagram of the layout of the three-axis acceleration sensor;

[0043] Figure 4 The present invention is a schematic structural diagram of a device for monitoring the operating status of a cable compression tube according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0046] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0047] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0048] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0049] In the description of the embodiments of the present application, the terms "multiple" and "several" refer to more than two (including two). Similarly, "multiple groups" refer to more than two groups (including two groups), and "multiple pieces" refer to more than two pieces (including two pieces).

[0050] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0051] Example 1

[0052] Please refer to Figure 1In order to solve the problem that the manual inspection and regular maintenance methods in the prior art are not only inefficient but also difficult to detect potential problems in a timely manner, an embodiment of the present invention provides a flow chart of a method for monitoring the operating status of a cable crimping tube. First, according to the crimping characteristics of the crimping tube, a temperature sampling measurement point is selected at the cable joint, and a thermocouple is arranged to measure the temperature; based on the vibration of the cable joint caused by the electromagnetic force of the cable, the vibration acceleration is obtained by using an acceleration sensor, and the vibration displacement data of the cable crimping tube is obtained by fast Fourier transform, frequency domain quadratic integration and inverse Fourier transform. Curve fitting is performed according to the time and amplitude of each maximum point to obtain a vibration attenuation function, and the vibration attenuation equivalent time constant of the above-mentioned ground wire to be measured is determined according to the above-mentioned vibration attenuation function, and the operating status of the cable crimping tube is monitored according to the predicted temperature, natural frequency and attenuation time constant of the cable crimping tube. The following specific steps are included:

[0053] S1. Obtain temperature data and vibration acceleration data of the cable crimping tube;

[0054] For details, please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the layout of temperature measurement points. Figure 3 The diagram below shows the placement of the triaxial accelerometers. First, local heating of the crimping tube is monitored to obtain temperature data. Temperature measurement points are pre-selected on the cable surface, and thermocouples are placed at each point. Three thermocouples are set up at each point, spaced 120° apart on the same cross section. Temperature data from the crimping tube is obtained based on the thermocouples not present.

[0055] The loosening vibration of the crimping tube is then monitored to obtain vibration acceleration data for the cable crimping tube. The accelerometer is positioned a certain distance from the stress cones at both ends of the cable connector. A triaxial accelerometer is installed on the cable insulation surface, with its z-axis perpendicular to the insulation surface. This is done to obtain vibration acceleration data for the cable crimping tube. The acceleration data measured at the two accelerometer placement points is geometrically averaged to obtain the final vibration acceleration data for the cable crimping tube.

[0056] S2. Calculating the natural frequency and vibration displacement corresponding to the cable compression tube according to the vibration acceleration data, and then calculating the vibration attenuation equivalent time constant corresponding to the cable compression tube according to the vibration displacement;

[0057] Preferably, before calculating the natural frequency and vibration displacement corresponding to the cable compression tube based on the vibration acceleration data, it also includes: performing data preprocessing on the vibration acceleration data; wherein, the data preprocessing includes: abnormal data deletion processing, duplicate data deletion processing, missing data repair processing and data noise reduction processing.

[0058] Specifically, after obtaining the vibration acceleration data of the cable compression tube, considering that the raw data collected by the sensor has duplicates, abnormal items, and missing data, the acceleration data of the cable accessory compression tube is first preprocessed. The processing process includes deleting abnormal data, deleting duplicate data, and repairing missing data. Abnormal data and duplicate data with an error greater than 3 times the standard deviation (99.7% confidence interval) are directly deleted, and the missing data are supplemented using the linear interpolation method shown in the following formula (1).

[0059]

[0060] Where R j For each sensor data, R j where N is the length of the sensor data sequence; j = 1, 2…N.

[0061] Furthermore, the acceleration data from the cable accessory crimp tube is subject to noise, necessitating noise reduction processing of the acquired vibration acceleration data. This noise can adversely affect the accuracy of the crimp tube's vibration acceleration data. To minimize this noise interference, the data is intercepted and the acceleration data from the cable accessory crimp tube is selected and retained as valid data for subsequent analysis.

[0062] Preferably, the calculating the natural frequency and vibration displacement corresponding to the cable crimping tube according to the vibration acceleration data includes: performing fast Fourier transform on the vibration acceleration data; constructing a corresponding vibration acceleration frequency domain curve according to the result of the fast Fourier transform, and then taking the frequency corresponding to the peak point in the vibration acceleration frequency domain curve as the natural frequency corresponding to the cable crimping tube; performing second-order integration processing in the frequency domain on the vibration acceleration data according to the result of the fast Fourier transform, and performing inverse Fourier transform on the second-order integration result obtained by the second-order integration processing in the frequency domain to obtain the vibration displacement corresponding to the cable crimping tube.

[0063] Preferably, the vibration attenuation equivalent time constant corresponding to the cable compression tube is calculated based on the vibration displacement, including: calculating the fitting amplitude corresponding to the displacement maximum point based on the displacement maximum point corresponding to the vibration displacement and a preset vibration attenuation function; calculating the residual sum of squares between the true amplitude of the displacement maximum point and the fitting amplitude, and then determining the vibration attenuation equivalent time constant corresponding to the cable compression tube based on the residual sum of squares.

[0064] Specifically, the natural frequency corresponding to the cable compression tube is calculated in the following way:

[0065] Perform fast Fourier transform (FFT) on the above effective acceleration data, convert the time domain analysis to frequency domain analysis, and perform frequency domain peak picking in the frequency domain. Find the peak point on the acceleration frequency domain function curve. The frequency corresponding to the peak point is a certain order natural frequency of the structure. The calculation formula is:

[0066]

[0067] Where a is the three-dimensional acceleration of the cable compression tube vibration, m / s 2 ;f is frequency, Hz; is the first-order derivative of the three-dimensional acceleration of the cable compression tube vibration in the frequency domain; It is the second-order derivative of the three-dimensional acceleration of the cable compression tube vibration in the frequency domain. When the first-order derivative of the three-dimensional acceleration of the cable compression tube vibration in the frequency domain is zero and the second-order derivative of the three-dimensional acceleration of the cable compression tube vibration in the frequency domain is zero, this point is the peak point of the acceleration in the frequency domain.

[0068] Calculate the equivalent time constant of vibration attenuation corresponding to the cable compression tube according to the following method:

[0069] The processed acceleration data is subjected to a second-order frequency domain integration. First, the fast Fourier transform is used to convert the acceleration data of the compression tube vibration from the time domain to the frequency domain. Then, the integral property of the Fourier transform is used to convert the time domain integration operation into an algebraic operation in the frequency domain using the first-order integral formula of the Fourier transform (Equation 3) and the second-order integral formula of the Fourier transform (Equation 4).

[0070]

[0071] Where F represents the Fourier transform operation; F(ω) is the frequency domain array of f(T) after the FFT transform; f(T) is the three-dimensional acceleration data of the compressed pipe vibration; ω is the angular frequency; δ(ω) is the Dirac delta function, which takes on an infinite value when δ = 0 and is 0 elsewhere. Its integral is 1, which represents the DC component (i.e., the component with a frequency of 0) in the frequency domain. The ω array must be determined by using both the frequency and the data length, and its calculation formula is shown below:

[0072]

[0073] Where, ω i represents the angular frequency of the i-th frequency component; f s is the sampling frequency; n represents the total number of sample points of the signal; nfft represents the number of sample points used for FFT transformation; n is the data length of the preprocessed data; nfft is the data length when performing fast Fourier transform.

[0074] After the acceleration data is integrated in the frequency domain, it is returned to the time domain through inverse Fourier transform. The data result obtained is the integration result of the time domain array, that is, the displacement data result of the vibration of the time domain downward pressure pipe.

[0075] Set the parameterized equation of the vibration attenuation function:

[0076]

[0077] In the formula, A, B, and τ are the fitting parameters of the attenuation function to be fitted. τ is the time constant of the vibration attenuation function, i.e., the equivalent time constant of the vibration attenuation mentioned above, which reflects the attenuation rate of the vibration waveform. Based on the displacement data of the compression tube vibration in the time domain, the time of the displacement maximum point of each compression tube vibration is input into the current vibration attenuation function, and the fitting amplitude corresponding to each current maximum point is calculated;

[0078] Calculate the residual sum of squares of all current amplitudes and the fitted amplitude, and compare the current residual sum of squares with the preset error threshold;

[0079] The residual sum of squares is calculated using the following formula:

[0080] e i =y i -f(A,B,x i ,τ);

[0081]

[0082] Where, e i Indicates the difference between the amplitude corresponding to the i-th maximum point and the fitting amplitude, y i represents the amplitude corresponding to the i-th maximum point, x i represents the time corresponding to the ith maximum point, n represents the number of maximum points, f(A, B, x i,t,τ) represents the fitting amplitude corresponding to the i-th maximum point. If the current residual sum of squares is not less than 0.01, the attenuation function fitting parameters A, B, and τ are adjusted until the residual sum of squares is less than 0.01. The current vibration attenuation function is the vibration attenuation function of the cable compression tube under test, and the value of the vibration attenuation equivalent time constant τ is then determined.

[0083] S3. Compare the temperature data with a preset temperature warning threshold, compare the natural frequency with a preset natural frequency warning threshold, and compare the vibration attenuation equivalent time constant with a preset vibration attenuation equivalent time constant warning threshold, and then obtain a defect score corresponding to the cable crimping tube based on each comparison result, and perform a defect warning on the cable crimping tube based on the defect score.

[0084] Preferably, the temperature data is compared with a preset temperature warning threshold, the natural frequency is compared with a preset natural frequency warning threshold, and the vibration attenuation equivalent time constant is compared with a preset vibration attenuation equivalent time constant warning threshold, and then a defect score corresponding to the cable crimping tube is obtained according to each comparison result, and a defect warning is performed on the cable crimping tube according to the defect score, including: obtaining a first weight coefficient corresponding to the temperature data, a second weight coefficient corresponding to the natural frequency, and a third weight coefficient corresponding to the vibration attenuation equivalent time constant; comparing the temperature data with the preset temperature warning threshold to obtain a corresponding first comparison result, and performing a defect warning on the cable crimping tube according to the defect score. Obtain a first defect score corresponding to the temperature data; compare the natural frequency with a preset natural frequency warning threshold to obtain a corresponding second comparison result, and obtain a second defect score corresponding to the natural frequency based on the second comparison result and the second weight coefficient; compare the vibration attenuation equivalent time constant with a preset vibration attenuation equivalent time constant warning threshold to obtain a corresponding third comparison result, and obtain a third defect score corresponding to the vibration attenuation equivalent time constant based on the third comparison result and the third weight coefficient; obtain a total defect score corresponding to the cable crimping tube based on the first defect score, the second defect score and the third defect score, and perform a defect warning on the cable crimping tube based on the total defect score.

[0085] Specifically, the operating status of the cable compression tube is evaluated based on the data analysis results of the local heating monitoring data of the compression tube and the vibration monitoring data of the compression tube loosening. Corresponding information feedback is provided based on the evaluation results. This includes actual monitoring database suggestions and verification, as well as defect scoring settings:

[0086] Among them, the establishment and verification of the actual monitoring database includes: simulating the actual operating environment of the actual cable crimping tube in the laboratory, collecting the vibration data of the cable crimping tube in different sizes, different degrees of looseness, and different defect states, as well as the outer surface temperature of the cable joint and the temperature of the cable crimping tube, and integrating them into a cable crimping tube operating status database, and setting the crimping tube temperature threshold and the loose vibration threshold for actual crimping tube operating status monitoring and evaluation; after the actual cable joint is installed, the cable joint should be in a normal working state. Within a certain period of time after the cable is just put into operation, it is assumed that the cable joint crimping tube at this time is matched, and temperature data and vibration data are received. Combined with the data in the operating status database of the cable crimping tube, threshold correction is performed on the temperature data difference and vibration data difference of a single individual; after the specified time, the system enters the monitoring mode to perform predictive monitoring and evaluation on the temperature data and vibration data of the cable crimping tube.

[0087] The defect score setting includes: setting weight coefficients of the three characteristic quantities of the crimping tube temperature, natural frequency, and vibration equivalent decay time constant; setting warning thresholds for the crimping tube temperature, natural frequency, and vibration equivalent decay time constant; dividing the portion exceeding the threshold by the threshold, and then multiplying it by the weight coefficient of the corresponding characteristic quantity to obtain the defect score of the single characteristic quantity; and finally, performing a graded warning on the operation status of the cable crimping tube based on the total defect score of the three characteristic quantities. The specific expression is as follows:

[0088]

[0089] Where K is the total defect score of the three characteristic quantities; α i is the weight coefficient of the corresponding characteristic quantity. In this embodiment, the weight coefficient α1 of the compression tube temperature is 0.6, the weight coefficient 0.2 of the compression tube vibration natural frequency is 0.2, and the weight coefficient α3 of the compression tube vibration equivalent attenuation time constant is 0.2; Δn i is the part exceeding the threshold; n i is the threshold corresponding to a feature quantity.

[0090] Thus, the present invention provides a method for monitoring the operating status of a cable compression tube, which obtains temperature data and vibration acceleration data of the cable compression tube; calculates the natural frequency and vibration displacement corresponding to the cable compression tube based on the vibration acceleration data, and then calculates the vibration attenuation equivalent time constant corresponding to the cable compression tube based on the vibration displacement; compares the temperature data with a preset temperature warning threshold, compares the natural frequency with a preset natural frequency warning threshold, and compares the vibration attenuation equivalent time constant with a preset vibration attenuation equivalent time constant warning threshold, and then obtains a defect score corresponding to the cable compression tube based on each comparison result, and issues a defect warning for the cable compression tube based on the defect score. Compared to manual inspection methods, the present invention obtains temperature data and vibration acceleration data of the cable compression tube, then automatically calculates the defect score corresponding to the cable compression tube based on the obtained temperature data and vibration acceleration data, and issues a defect warning for the cable compression tube based on the defect score. This method can automatically monitor the operating status of cable accessory compression tubes in real time, improve the efficiency of cable compression tube operating status monitoring, and has a high level of intelligence and broad application prospects.

[0091] Example 2

[0092] Please refer to Figure 4 , is a schematic structural diagram of a cable compression tube operation status monitoring device provided by one embodiment of the present invention, the device comprising: a data acquisition module, a vibration parameter calculation module, and a cable compression tube defect warning module;

[0093] The data acquisition module is used to acquire temperature data and vibration acceleration data of the cable crimping tube;

[0094] The vibration parameter calculation module is used to calculate the natural frequency and vibration displacement corresponding to the cable compression tube according to the vibration acceleration data, and then calculate the vibration attenuation equivalent time constant corresponding to the cable compression tube according to the vibration displacement;

[0095] The cable crimping tube defect warning module is used to compare the temperature data with a preset temperature warning threshold, compare the natural frequency with a preset natural frequency warning threshold, and compare the vibration attenuation equivalent time constant with a preset vibration attenuation equivalent time constant warning threshold, and then obtain a defect score corresponding to the cable crimping tube based on each comparison result, and perform a defect warning on the cable crimping tube based on the defect score.

[0096] Preferably, the calculating the natural frequency and vibration displacement corresponding to the cable crimping tube according to the vibration acceleration data includes:

[0097] performing a fast Fourier transform on the vibration acceleration data;

[0098] Constructing a corresponding vibration acceleration frequency domain curve based on the result of fast Fourier transform, and then taking the frequency corresponding to the peak point in the vibration acceleration frequency domain curve as the natural frequency corresponding to the cable crimping tube;

[0099] The vibration acceleration data is processed by second-order frequency domain integration according to the result of fast Fourier transform, and the second-order integration result obtained by the second-order frequency domain integration is processed by inverse Fourier transform to obtain the vibration displacement corresponding to the cable compression tube.

[0100] Preferably, the calculating of the vibration attenuation equivalent time constant corresponding to the cable crimping tube according to the vibration displacement includes:

[0101] Calculating the fitting amplitude corresponding to the maximum displacement point according to the maximum displacement point corresponding to the vibration displacement and a preset vibration attenuation function;

[0102] The residual square sum between the true amplitude of the displacement maximum point and the fitting amplitude is calculated, and then the vibration attenuation equivalent time constant corresponding to the cable compression tube is determined according to the residual square sum.

[0103] It should be noted that the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed across multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. In addition, in the drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art can understand and implement the present invention without inventive effort.

[0104] Those skilled in the art will clearly understand that for the sake of convenience and brevity, the specific working process of the device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0105] Example 3

[0106] Accordingly, an embodiment of the present invention provides an electronic device, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the operating status monitoring method of the cable crimping tube described in the above-mentioned embodiment of the invention.

[0107] The electronic device may be a computing device such as a desktop computer, a notebook computer, a PDA, a cloud server, etc. The device may include, but is not limited to, a processor and a memory.

[0108] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the device and connects various parts of the entire device using various interfaces and lines.

[0109] Example 4

[0110] Accordingly, an embodiment of the present invention provides a storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the storage medium is located is controlled to execute the cable compression tube operation status monitoring method described in the above-mentioned embodiment of the invention.

[0111] The memory can be used to store the computer program, and the processor realizes various functions of the device by running or executing the computer program stored in the memory and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required for a function, etc.; the data storage area can store data created according to the use of the mobile phone, etc. In addition, the memory can include a high-speed random access memory and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (FlashCard), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0112] The storage medium is a computer-readable storage medium, and the computer program is stored in the computer-readable storage medium. When the computer program is executed by the processor, the steps of each of the above-mentioned method embodiments can be implemented. The computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0113] It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practices in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practices, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0114] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for monitoring the operating status of a cable compression tube, characterized in that: include: Obtain temperature data and vibration acceleration data of cable crimping tubes; Calculating the natural frequency and vibration displacement corresponding to the cable compression tube according to the vibration acceleration data, and then calculating the vibration attenuation equivalent time constant corresponding to the cable compression tube according to the vibration displacement; The temperature data is compared with a preset temperature warning threshold, the natural frequency is compared with a preset natural frequency warning threshold, and the vibration attenuation equivalent time constant is compared with a preset vibration attenuation equivalent time constant warning threshold. Then, a defect score corresponding to the cable crimping tube is obtained based on each comparison result, and a defect warning is issued for the cable crimping tube based on the defect score.

2. The method for monitoring the operating status of a cable compression tube according to claim 1, wherein: Before calculating the natural frequency and vibration displacement corresponding to the cable compression tube according to the vibration acceleration data, the method further includes: The vibration acceleration data is preprocessed; wherein the data preprocessing includes: abnormal data deletion processing, duplicate data deletion processing, missing data repair processing and data noise reduction processing.

3. The method for monitoring the operating status of a cable compression tube according to claim 1, wherein: Calculating the natural frequency and vibration displacement corresponding to the cable compression tube according to the vibration acceleration data includes: performing a fast Fourier transform on the vibration acceleration data; Constructing a corresponding vibration acceleration frequency domain curve based on the result of fast Fourier transform, and then taking the frequency corresponding to the peak point in the vibration acceleration frequency domain curve as the natural frequency corresponding to the cable crimping tube; The vibration acceleration data is processed by second-order frequency domain integration according to the result of fast Fourier transform, and the second-order integration result obtained by the second-order frequency domain integration is processed by inverse Fourier transform to obtain the vibration displacement corresponding to the cable compression tube.

4. The method for monitoring the operating status of a cable compression tube according to claim 3, wherein: Calculating the vibration attenuation equivalent time constant corresponding to the cable crimping tube according to the vibration displacement includes: Calculating the fitting amplitude corresponding to the maximum displacement point according to the maximum displacement point corresponding to the vibration displacement and a preset vibration attenuation function; The residual square sum between the true amplitude of the displacement maximum point and the fitting amplitude is calculated, and then the vibration attenuation equivalent time constant corresponding to the cable compression tube is determined according to the residual square sum.

5. The method for monitoring the operating status of a cable compression tube according to claim 1, wherein: The temperature data is compared with a preset temperature warning threshold, the natural frequency is compared with a preset natural frequency warning threshold, and the vibration attenuation equivalent time constant is compared with a preset vibration attenuation equivalent time constant warning threshold, and then a defect score corresponding to the cable crimping tube is obtained according to each comparison result, and a defect warning is issued for the cable crimping tube according to the defect score, including: Obtaining a first weight coefficient corresponding to the temperature data, a second weight coefficient corresponding to the natural frequency, and a third weight coefficient corresponding to the vibration attenuation equivalent time constant; Comparing the temperature data with a preset temperature warning threshold to obtain a corresponding first comparison result, and obtaining a first defect score corresponding to the temperature data based on the first comparison result and the first weight coefficient; Comparing the natural frequency with a preset natural frequency warning threshold to obtain a corresponding second comparison result, and obtaining a second defect score corresponding to the natural frequency based on the second comparison result and the second weight coefficient; Comparing the vibration attenuation equivalent time constant with a preset vibration attenuation equivalent time constant warning threshold to obtain a corresponding third comparison result, and obtaining a third defect score corresponding to the vibration attenuation equivalent time constant based on the third comparison result and the third weight coefficient; A total defect score corresponding to the cable crimping tube is obtained based on the first defect score, the second defect score, and the third defect score, and a defect warning is issued for the cable crimping tube based on the total defect score.

6. A device for monitoring the operating status of a cable compression tube, characterized in that: include: Data acquisition module, vibration parameter calculation module and cable crimping tube defect warning module; The data acquisition module is used to acquire temperature data and vibration acceleration data of the cable crimping tube; The vibration parameter calculation module is used to calculate the natural frequency and vibration displacement corresponding to the cable compression tube according to the vibration acceleration data, and then calculate the vibration attenuation equivalent time constant corresponding to the cable compression tube according to the vibration displacement; The cable crimping tube defect warning module is used to compare the temperature data with a preset temperature warning threshold, compare the natural frequency with a preset natural frequency warning threshold, and compare the vibration attenuation equivalent time constant with a preset vibration attenuation equivalent time constant warning threshold, and then obtain a defect score corresponding to the cable crimping tube based on each comparison result, and perform a defect warning on the cable crimping tube based on the defect score.

7. The operating status monitoring device for a cable compression tube according to claim 6, characterized in that: Calculating the natural frequency and vibration displacement corresponding to the cable compression tube according to the vibration acceleration data includes: performing a fast Fourier transform on the vibration acceleration data; Constructing a corresponding vibration acceleration frequency domain curve based on the result of fast Fourier transform, and then taking the frequency corresponding to the peak point in the vibration acceleration frequency domain curve as the natural frequency corresponding to the cable crimping tube; The vibration acceleration data is processed by second-order frequency domain integration according to the result of fast Fourier transform, and the second-order integration result obtained by the second-order frequency domain integration is processed by inverse Fourier transform to obtain the vibration displacement corresponding to the cable compression tube.

8. The operating status monitoring device for a cable compression tube according to claim 7, characterized in that: Calculating the vibration attenuation equivalent time constant corresponding to the cable crimping tube according to the vibration displacement includes: Calculating the fitting amplitude corresponding to the maximum displacement point according to the maximum displacement point corresponding to the vibration displacement and a preset vibration attenuation function; The residual square sum between the true amplitude of the displacement maximum point and the fitting amplitude is calculated, and then the vibration attenuation equivalent time constant corresponding to the cable compression tube is determined according to the residual square sum.

9. An electronic device, characterized in that: The method comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, the method for monitoring the operating status of the cable compression tube according to any one of claims 1 to 5 is implemented.

10. A storage medium, characterized in that: The storage medium includes a stored computer program, wherein when the computer program is running, the device where the storage medium is located is controlled to execute the operating status monitoring method of the cable compression tube according to any one of claims 1 to 5.

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