Automatic acquisition and management method for high-altitude crimping data of ground wire
By using ultrasonic signals and multimodal resonance characteristics during high-altitude crimping, combined with ambient temperature and stress data, the dimensional data of the crimping pipe is automatically calculated and corrected, and the safety and data authenticity problems in high-altitude crimping measurement are solved, and efficient and accurate measurement results are achieved.
Patent Information
- Application Number
- CN202510461692.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2025-05-13
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In high-altitude crimping technology, the existing measurement methods have problems such as high safety risks, difficulty in ensuring data authenticity and low work efficiency.
By applying ultrasonic signals to the crimp pipe during high-altitude crimping, longitudinal and transverse modal resonance frequencies are collected, combined with multimodal resonance characteristics and ambient temperature and stress data, the dimensional data of the crimp pipe is automatically calculated and corrected using the frequency-dimensional correlation formula.
It realizes high-precision, real-time crimping pipe size measurement, reduces safety risks, improves data authenticity and reliability, and improves work efficiency.
Smart Images
Figure CN119984118A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of high-altitude crimping dimension measurement, and in particular relates to a method for automatically collecting and managing high-altitude crimping data of ground wires. Background Art
[0002] High-altitude crimping technology is widely used in power transmission, communication towers, bridge construction and other fields, especially in the installation and maintenance of high-voltage transmission lines. As a key component for connecting wires, the dimensional accuracy of the crimping tube is directly related to the safety and reliability of the entire system. Therefore, accurately measuring the length, diameter and wall thickness of the crimping tube is crucial to ensure the quality of crimping.
[0003] At present, the measurement of high-altitude crimping dimensions mainly relies on manual operation, which has many serious shortcomings. First, the safety issue is prominent: construction workers need to work for a long time at high altitudes, facing multiple risks such as falling, electric shock, and strong winds. Although they have high-altitude work permits, long-term exposure still poses safety hazards; supervisors cannot measure in person because they do not have high-altitude work permits, resulting in passive supervision and difficulty in grasping the crimping quality in real time, which increases project management risks. Secondly, the authenticity of the data is difficult to guarantee: all dimensional data is recorded and provided by the construction party, which is easily affected by time pressure and cost considerations. The data may be inaccurate or incomplete, and the supervisors cannot verify it independently. It is difficult to define responsibilities and easily cause disputes. Finally, it is inefficient: traditional mechanical measurement takes a long time, especially in large projects, involving a large number of crimping pipes, and the measurement workload is huge, which seriously affects the construction progress; data transmission requires multiple links, which is prone to lag or loss, further reducing work efficiency. Summary of the invention
[0004] The present invention provides a method for automatically collecting and managing data of high-altitude crimping of ground wires, which solves the technical problems of high safety risk, difficulty in ensuring data authenticity and low work efficiency in related technologies.
[0005] The present invention provides a method for automatically collecting and managing data of high-altitude crimping of ground wires, comprising the following steps: Step S101, before the crimping operation begins, recording the initial dimension data of the crimping tube, wherein the dimension data includes: length, diameter and wall thickness; Step S102, during the crimping operation, applying an ultrasonic signal to the crimping tube through multi-frequency excitation, and using a receiver to collect the resonant frequencies of the longitudinal mode and the transverse mode, combining the multi-modal resonance characteristics, using a frequency-size correlation formula, calculating the size data of the crimping tube during the crimping operation, and representing it through second size data; Step S103, collecting the ambient temperature and stress during the crimping operation, and correcting the second dimension data according to the ambient temperature and stress; Step S104, calculating the difference between the corrected second size data and the preset target size data, and generating a response measure by comparing the difference with a preset difference threshold.
[0006] Furthermore, an ultrasonic signal is applied to the crimping tube through multi-frequency excitation, and the specific steps include: Step S201, determining the frequency range according to the preset size range data of the crimping tube and the frequency range formula, wherein the frequency range includes the longitudinal frequency modal range and the transverse frequency modal range, and the frequency range formula of the longitudinal modal includes: , , the frequency range formula of the lateral mode includes: , ,in, and denote the minimum and maximum resonant frequencies of the longitudinal mode, respectively. It represents the initial elastic modulus of the crimped tube. represents the initial density of the compression tube, represents the damping coefficient, represents the modal coupling frequency offset, and Respectively represent the maximum and minimum length of the crimping tube, Indicates the reduction in length of the crimp tube. and denote the minimum and maximum resonant frequencies of the transverse mode, respectively. and Respectively represent the maximum and minimum diameters of the crimping tube. Indicates the change in diameter during crimping; Step S202, using a linear frequency sweep excitation method, using an ultrasonic actuator to apply an ultrasonic signal to the crimping tube within a frequency range; Step S203, using a receiver to record the time domain signal of the crimp tube response, and using fast Fourier transform to extract the resonant frequency of the crimp tube, wherein the time domain signal is an echo returned after being excited by the ultrasonic signal applied by the ultrasonic exciter, and is obtained by sampling at a first preset time interval.
[0007] Furthermore, an ultrasonic actuator is used to apply an ultrasonic signal at one end of the crimping tube by directly contacting the surface of the crimping tube.
[0008] Furthermore, the resonance frequency of the crimping tube is extracted using fast Fourier transform, and the specific steps are as follows: Step S2031: use the time domain signal Processing, in which represents the time domain signal after processing at the nth moment, represents the time domain signal at the nth moment, represents the time domain signal after processing at the n-1th moment, Represents the first exponential decay coefficient, ranging from 0 to 1. represents the weighted movement coefficient, represents the weight coefficient of the kth sampling point, M represents the number of sampling points, represents the time domain signal at the nkth moment, k represents the sampling point index; Step S2032, using fast Fourier transform to convert the processed time domain signal into a frequency domain signal to obtain a spectrum diagram; Step S2033 , extracting the resonant frequencies of Q longitudinal modes and J transverse modes according to the frequency spectrum, wherein Q and J are user-defined parameters.
[0009] Furthermore, the frequency-size correlation formula includes: The length is calculated as: ; The diameter is calculated as: ; The wall thickness is calculated as: ; Among them, L, D and They represent the length, diameter and wall thickness of the crimped tube, c represents the propagation speed of ultrasonic waves in the crimped tube, q represents the index of the longitudinal mode, represents the weight coefficient of the qth longitudinal mode, represents the resonant frequency of the qth longitudinal mode, j represents the index of the transverse mode, represents the weight coefficient of the jth lateral mode, represents the resonant frequency of the jth transverse mode, and They represent the resonant frequencies of the first transverse mode and the first longitudinal mode, respectively, Q represents the number of resonant frequencies of the longitudinal mode, and J represents the number of resonant frequencies of the transverse mode.
[0010] Furthermore, the second dimension data is corrected according to the ambient temperature and stress, and the calculation formula for the correction processing includes: The corrected length is calculated as: ; The calculation formula for the corrected diameter is: ; The calculation formula for the corrected wall thickness is: ; The elastic modulus of the compression tube is calculated as follows: ; The calculation formula for the density of the compression tube is: ; in, , and Respectively represent the length, diameter and wall thickness after correction. and represent the elastic modulus at ambient temperature and the density at ambient temperature, respectively. represents the temperature variation coefficient of elastic modulus, represents the temperature variation coefficient of density, Represents stress.
[0011] Furthermore, the differences between the corrected length, diameter and wall thickness and the preset target length, target diameter and target wall thickness are calculated respectively, and these differences are compared with the preset thresholds of length difference, diameter difference and wall thickness difference, so as to generate response measures.
[0012] The beneficial effects of the present invention are as follows: the present invention applies ultrasonic signals and collects the longitudinal and transverse modal resonance frequencies of the crimping tube, combines the multimodal vibration characteristics, and uses the frequency-size correlation formula to accurately calculate the length, diameter and wall thickness of the crimping tube; wherein the multimodal vibration analysis can capture the vibration characteristics of the crimping tube in different directions, thereby ensuring the high accuracy of the measurement results; The present invention introduces a real-time environmental temperature and stress monitoring system, which can synchronously collect temperature and stress data during the crimping process, and dynamically correct the second dimension data according to these parameters, eliminating the influence of external factors on the measurement results and ensuring the authenticity and reliability of the final second dimension data. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a flow chart of a method for automatically collecting and managing data of high-altitude crimping of ground wires of the present invention; Figure 2 This is a flow chart of applying an ultrasonic signal to a compression tube according to the present invention. DETAILED DESCRIPTION
[0014] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.
[0015] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in one or more embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0016] like Figure 1-Figure 2 As shown, a method for automatically collecting and managing data of high-altitude crimping of ground wires comprises the following steps: Step S101, before the crimping operation begins, recording the initial dimension data of the crimping tube, wherein the dimension data includes: length, diameter and wall thickness; Step S102, during the crimping operation, applying an ultrasonic signal to the crimping tube through multi-frequency excitation, and using a receiver to collect the resonant frequencies of the longitudinal mode and the transverse mode, combining the multi-modal resonance characteristics, using a frequency-size correlation formula, calculating the size data of the crimping tube during the crimping operation, and representing it through second size data; Step S103, collecting the ambient temperature and stress during the crimping operation, and correcting the second dimension data according to the ambient temperature and stress; Step S104, calculating the difference between the corrected second size data and the preset target size data, and generating a response measure by comparing the difference with a preset difference threshold.
[0017] In one embodiment of the present invention, an ultrasonic signal is applied to the crimping tube by multi-frequency excitation, and the specific steps include: Step S201, determining the frequency range according to the preset size range data of the crimping tube and the frequency range formula, wherein the frequency range includes the longitudinal frequency modal range and the transverse frequency modal range, and the frequency range formula of the longitudinal modal includes: , , the frequency range formula of the lateral mode includes: , ,in, and denote the minimum and maximum resonant frequencies of the longitudinal mode, respectively. It represents the initial elastic modulus of the crimped tube. represents the initial density of the compression tube, represents the damping coefficient, represents the modal coupling frequency offset, and Respectively represent the maximum and minimum length of the crimping tube, Indicates the reduction in length of the crimp tube. and denote the minimum and maximum resonant frequencies of the transverse mode, respectively. and Respectively represent the maximum and minimum diameters of the crimping tube. Indicates the change in diameter during crimping; Step S202, using a linear frequency sweep excitation method, using an ultrasonic actuator to apply an ultrasonic signal to the crimping tube within a frequency range; Excitation is the process of applying external energy to the crimping tube through an external device to induce a response of the crimping tube. The purpose of the excitation is to trigger the natural resonance behavior of the crimping tube, that is, to make the crimping tube generate a resonant frequency in its natural mode; Linear frequency sweep excitation refers to generating an ultrasonic signal with a gradually changing frequency through an ultrasonic exciter, covering the frequency range described in step S201. In this process, the frequency sweep rate needs to be accurately controlled to ensure that the signal at each frequency point can fully excite the resonance of the crimping tube; Step S203, using a receiver to record the time domain signal of the crimp tube response, and using fast Fourier transform to extract the resonant frequency of the crimp tube, wherein the time domain signal is an echo returned after being excited by the ultrasonic signal applied by the ultrasonic exciter, and is obtained by sampling at a first preset time interval; specifically, using signal processing software (such as MATLAB) to transform the time domain signal through fast Fourier transform to obtain a complex spectrum, i.e., a spectrum diagram, wherein the amplitude of the spectrum corresponds to the intensity of the signal, and the frequency represents different vibration modes; In one embodiment of the present invention, there are multiple ways to determine the maximum length and minimum length, as well as the maximum diameter and minimum diameter of the crimping tube. One is to preset according to the design standard. For example, the initial length is , the maximum length reduction ratio allowed for crimping is 5%, so the maximum length is , the shortest length is ; The second is to determine it through experiments. Specifically, under experimental conditions, multiple batches of crimping tubes are crimped, their initial lengths and final lengths are recorded, and the maximum and minimum values in the experimental test data are used as the maximum and minimum lengths of the crimping tubes.
[0018] In one embodiment of the present invention, multi-frequency excitation gradually applies ultrasonic signals within a preset frequency range by means of linear frequency sweep, covering the entire range from low frequency to high frequency. This enables the system to capture the resonant behavior of the crimping tube in different modes, avoiding key information that may be missed by single-frequency excitation. For example, the resonant frequency of the longitudinal mode is low and is mainly used to evaluate the axial deformation of the crimping tube; while the resonant frequency of the transverse mode is high and is used to evaluate radial and circumferential changes. By combining the multi-modal resonance characteristics, the length, diameter and wall thickness of the crimping tube can be calculated more accurately.
[0019] In one embodiment of the present invention, an ultrasonic actuator is used to apply an ultrasonic signal to one end of the crimp tube by directly contacting the surface of the crimp tube.
[0020] In one embodiment of the present invention, the resonance frequency of the crimping tube is extracted using fast Fourier transform, and the specific steps are as follows: Step S2031: use the time domain signal Processing, in which represents the time domain signal after processing at the nth moment, represents the time domain signal at the nth moment, represents the time domain signal after processing at the n-1th moment, Represents the first exponential decay coefficient, ranging from 0 to 1. represents the weighted movement coefficient, represents the weight coefficient of the kth sampling point, M represents the number of sampling points, represents the time domain signal at the nkth moment, k represents the sampling point index; Step S2032, using fast Fourier transform to convert the processed time domain signal into a frequency domain signal to obtain a spectrum diagram; Step S2033, extracting the resonant frequencies of Q longitudinal modes and J transverse modes according to the spectrum diagram, where Q and J are custom parameters; specifically, extracting the first low-frequency peak and subsequent Q-1 low-frequency peaks from the spectrum diagram as the resonant frequencies of the longitudinal modes, and extracting the subsequent J high-frequency peaks from the spectrum diagram as the resonant frequencies of the transverse modes.
[0021] In one embodiment of the present invention, through fast Fourier transform, the system can decompose the time domain signal into a series of discrete frequency components, each component corresponding to a specific frequency. For the crimping tube, the resonant frequency of the longitudinal mode usually appears in the low frequency region, while the resonant frequency of the transverse mode appears in the high frequency region. The high resolution of the fast Fourier transform enables the system to accurately identify the resonant frequencies of these different modes and avoid missing key information.
[0022] In one embodiment of the present invention, the multi-modal resonance characteristic indicates that after ultrasonic excitation is applied to the compression tube, the compression tube will resonate in the longitudinal mode and the transverse mode, generating different resonance frequencies, wherein the longitudinal mode is related to the length of the compression tube, and is the vibration of the pipeline along its axial direction, and the resonance frequency of the longitudinal mode is a low frequency; the transverse mode is related to the diameter and wall thickness of the compression tube, and is the radial vibration of the pipeline, and the resonance frequency of the transverse mode is a high frequency.
[0023] In one embodiment of the present invention, the frequency-size correlation formula includes: The length is calculated as: ; The diameter is calculated as: ; The wall thickness is calculated as: ; Among them, L, D and They represent the length, diameter and wall thickness of the crimped tube, c represents the propagation speed of ultrasonic waves in the crimped tube, q represents the index of the longitudinal mode, represents the weight coefficient of the qth longitudinal mode, represents the resonant frequency of the qth longitudinal mode, j represents the index of the transverse mode, represents the weight coefficient of the jth lateral mode, represents the resonant frequency of the jth transverse mode, and They represent the resonant frequencies of the first transverse mode and the first longitudinal mode, respectively, Q represents the number of resonant frequencies of the longitudinal mode, and J represents the number of resonant frequencies of the transverse mode.
[0024] In one embodiment of the present invention, a thermocouple temperature sensor and a strain gauge are installed at one end of the crimping tube to measure the ambient temperature and stress during the crimping process; and a DAQ device is used to read the ambient temperature and stress in real time and transmit them to a control center for subsequent correction of the second dimension data.
[0025] In one embodiment of the present invention, the second dimension data is corrected according to the ambient temperature and stress, and the calculation formula for the correction includes: The corrected length is calculated as: ; The corrected diameter is calculated as: ; The calculation formula for the corrected wall thickness is: ; The elastic modulus of the compression tube is calculated as follows: ; The calculation formula for the density of the compression tube is: ; in, , and Respectively represent the length, diameter and wall thickness after correction. and represent the elastic modulus at ambient temperature and the density at ambient temperature, respectively. represents the temperature variation coefficient of elastic modulus, represents the temperature variation coefficient of density, Represents stress.
[0026] In one embodiment of the present invention, the differences between the corrected length, diameter and wall thickness and the preset target length, target diameter and target wall thickness are calculated respectively, and the three differences are compared with the preset thresholds of the length difference, the diameter difference and the wall thickness difference, so as to generate response measures, wherein when any of the three differences exceeds its corresponding preset threshold, the system sends an alarm signal through an audible and visual alarm to remind the operator to pay attention to abnormal conditions, and check whether the crimping equipment has any faults or wear, to ensure that the equipment is in good working condition.
[0027] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.
Claims
1. A method for automatically collecting and managing data of ground wire high-altitude crimping, characterized in that: The following steps are involved: Step S101, before the crimping operation begins, recording the initial dimension data of the crimping tube, wherein the dimension data includes: length, diameter and wall thickness; Step S102, during the crimping operation, applying an ultrasonic signal to the crimping tube through multi-frequency excitation, and using a receiver to collect the resonant frequencies of the longitudinal mode and the transverse mode, combining the multi-modal resonance characteristics, using a frequency-size correlation formula, calculating the size data of the crimping tube during the crimping operation, and representing it through second size data; Step S103, collecting the ambient temperature and stress during the crimping operation, and correcting the second dimension data according to the ambient temperature and stress; Step S104, calculating the difference between the corrected second size data and the preset target size data, and generating a response measure by comparing the difference with a preset difference threshold.
2. The method for automatically collecting and managing data of high-altitude crimping of ground wires according to claim 1 is characterized in that: Applying ultrasonic signals to the crimp tube by multi-frequency excitation, the specific steps include: Step S201, determining the frequency range according to the preset size range data of the crimping tube and the frequency range formula, wherein the frequency range includes the longitudinal frequency modal range and the transverse frequency modal range, and the frequency range formula of the longitudinal modal includes: , , the frequency range formula of the lateral mode includes: , ,in, and denote the minimum and maximum resonant frequencies of the longitudinal mode, It represents the initial elastic modulus of the crimped tube. represents the initial density of the compression tube, represents the damping coefficient, represents the modal coupling frequency offset, and Respectively represent the maximum and minimum length of the crimping tube, Indicates the reduction in length of the crimp tube. and denote the minimum and maximum resonant frequencies of the transverse mode, respectively. and Respectively represent the maximum and minimum diameters of the crimping tube. Indicates the change in diameter during crimping; Step S202, using a linear frequency sweep excitation method, using an ultrasonic actuator to apply an ultrasonic signal to the crimping tube within a frequency range; Step S203, using a receiver to record the time domain signal of the crimp tube response, and using fast Fourier transform to extract the resonant frequency of the crimp tube, wherein the time domain signal is an echo returned after being excited by the ultrasonic signal applied by the ultrasonic exciter, and is obtained by sampling at a first preset time interval.
3. The method for automatically collecting and managing data of high-altitude crimping of ground wires according to claim 2 is characterized in that: An ultrasonic actuator is used to apply an ultrasonic signal to one end of the crimp tube by directly contacting the surface of the crimp tube.
4. The method for automatically collecting and managing data of high-altitude crimping of ground wires according to claim 2 is characterized in that: Use fast Fourier transform to extract the resonant frequency of the crimp tube. The specific steps are: Step S2031: use the time domain signal Processing, in which represents the time domain signal after processing at the nth moment, represents the time domain signal at the nth moment, represents the time domain signal after processing at the n-1th moment, Represents the first exponential decay coefficient, ranging from 0 to 1. represents the weighted movement coefficient, represents the weight coefficient of the kth sampling point, M represents the number of sampling points, represents the time domain signal at the nkth moment, k represents the sampling point index; Step S2032, using fast Fourier transform to convert the processed time domain signal into a frequency domain signal to obtain a spectrum diagram; Step S2033 , extracting the resonant frequencies of Q longitudinal modes and J transverse modes according to the frequency spectrum, wherein Q and J are user-defined parameters.
5. The method for automatically collecting and managing data of high-altitude crimping of ground wires according to claim 2 is characterized in that: The frequency-size correlation formula includes: The length is calculated as: ; The diameter is calculated as: ; The wall thickness is calculated as: ; Among them, L, D and They represent the length, diameter and wall thickness of the crimped tube, c represents the propagation speed of ultrasonic waves in the crimped tube, q represents the index of the longitudinal mode, represents the weight coefficient of the qth longitudinal mode, represents the resonant frequency of the qth longitudinal mode, j represents the index of the transverse mode, represents the weight coefficient of the jth lateral mode, represents the resonant frequency of the jth transverse mode, and They represent the resonant frequencies of the first transverse mode and the first longitudinal mode, respectively, Q represents the number of resonant frequencies of the longitudinal mode, and J represents the number of resonant frequencies of the transverse mode.
6. The method for automatically collecting and managing data of high-altitude crimping of ground wires according to claim 5 is characterized in that: The second dimension data is corrected according to the ambient temperature and stress, and the calculation formula for the correction processing includes: The corrected length is calculated as: ; The calculation formula for the corrected diameter is: ; The calculation formula for the corrected wall thickness is: ; The elastic modulus of the compression tube is calculated as follows: ; The calculation formula for the density of the compression tube is: ; in, , and Respectively represent the length, diameter and wall thickness after correction. and represent the elastic modulus at ambient temperature and the density at ambient temperature, respectively. represents the temperature variation coefficient of elastic modulus, represents the temperature variation coefficient of density, Represents stress.
7. The method for automatically collecting and managing data of high-altitude crimping of ground wires according to claim 6 is characterized in that: The differences between the corrected length, diameter and wall thickness and the preset target length, target diameter and target wall thickness are calculated respectively, and these differences are compared with the preset thresholds of length difference, diameter difference and wall thickness difference, so as to generate response measures.