Shielded data transmission cable and method of making same

Abstract

The application relates to the technical field of shielded cables, in particular to a shielded data transmission cable and a preparation method thereof, which comprises the following steps: drawing a wire core through a wire drawing machine, extruding and shaping an insulating material in a molten state to wrap the outer layer of the wire core to obtain an insulating wire core; gathering multiple insulating wire cores to form a wire harness, and twisting and shaping multiple wire harnesses to obtain a cable core, obtaining stress data of each wire harness and the cable core, calculating the step change interference degree of each stress data in a stress sequence, obtaining the sudden deviation degree of each stress data in the stress sequence, extracting stress abnormal data, correcting each stress abnormal data, obtaining the pointing degree of each pointing wire harness and the gathering degree of the cable core, and adjusting the wrapping belt tension of a wrapping machine in the preparation process of the shielded data transmission cable through the deviation between the pointing degree and the gathering degree, so that the preparation of the shielded data transmission cable is completed. The application can improve the accuracy of adjusting and compensating the wrapping belt tension.

Description

Technical Field

[0001] This application relates to the field of shielded cable technology, specifically to a shielded data transmission cable and its manufacturing method. Background Technology

[0002] Currently, shielded cables typically have a semi-conductive material layer covering the surface of the conductor or insulation layer. This is used to reduce the interference of external electromagnetic fields on the data transmission line, thereby ensuring the reliability of data transmission quality. At the same time, it can prevent the data transmission line from radiating electromagnetic energy outward, avoiding electromagnetic interference to other equipment or systems on the data transmission cable, thus ensuring the reliability and safety of the shielded data transmission cable.

[0003] In the manufacturing process of shielded data transmission cables, the shielding layer is typically applied to the cable core using a wrapping machine, where shielding materials such as copper tape, aluminum foil, or copper braided mesh are wrapped. Simultaneously, the wrapping tension of the tape usually needs adaptive compensation to avoid electric field concentration in the wrapped areas and to ensure the cable possesses excellent mechanical and physical properties. During the wrapping process, existing technologies mostly analyze the cable's tightness based on stress data and adjust the wrapping tension accordingly. However, because the stress data on the cable can be affected by machine vibrations, causing sudden deviations, existing technologies do not adequately consider these sudden deviations and cannot accurately correct the stress data, thus affecting the accuracy of the wrapping tension adjustment. Summary of the Invention

[0004] To address the aforementioned technical problems, the purpose of this application is to provide a shielded data transmission cable and its manufacturing method, the specific technical solution of which is as follows:

[0005] This application provides a method for manufacturing a shielded data transmission cable, including the following steps:

[0006] The wire core is drawn by a wire drawing machine, and the molten insulating material is extruded and molded to wrap the outer layer of the wire core to obtain an insulated wire core; multiple insulated wire cores are gathered together to form a wire bundle, and multiple wire bundles are twisted to form a cable core; stress data of each wire bundle and cable core are obtained, and stress sequences of each wire bundle and cable core are obtained respectively.

[0007] For each stress data in any stress sequence, a sliding window is constructed with each stress data as the center. Modal decomposition is performed on all stress data within the sliding window to obtain each modal component. Based on the variation regularity of each modal component and the variation trend of the data within the modal component, the vibration disturbance characteristic value of each modal component is obtained. By the average level and difference of the vibration disturbance characteristic values ​​of all modal components extracted within a short time range of each stress data, the step disturbance degree of each stress data in the stress sequence is obtained.

[0008] Based on the degree of abrupt change and the characteristics of abrupt change in the step disturbance of all stress data within each stress data sliding window, the sudden deviation of each stress data in the stress sequence is obtained, and the sudden deviation anomaly is detected to extract stress anomaly data.

[0009] Based on the deviation of each stress anomaly data in the stress sequence from the average level of all stress data, and combined with the sudden deviation of each stress anomaly data, the stress correction sequence of each wire harness and cable core is obtained by correcting each stress anomaly data.

[0010] By extracting the directional wire bundles from the average level of the stress correction sequence of each wire bundle and cable core, and analyzing the comparison results between the average stress of each directional wire bundle and the cable core with respect to the stress correction sequence, the directional degree of each directional wire bundle and the convergence degree of the cable core are obtained respectively. By adjusting the wrapping tension of the wrapping machine during the preparation of the shielded data transmission cable through the deviation between the directional degree and the convergence degree, the preparation of the shielded data transmission cable is completed.

[0011] Preferably, the method for obtaining the vibration interference characteristic values ​​of each modal component is as follows:

[0012] Calculate the information entropy of each modal vector and the mean of the absolute values ​​of all elements in the first-order difference vector of each modal vector. Use the exponentially normalized result of the product of the two calculation results as the vibration disturbance characteristic value of each modal vector.

[0013] Preferably, the method for calculating the step variation interference degree of each stress data in the stress sequence is as follows:

[0014] ;

[0015] In the formula, Let be the order variation interference degree of the t-th stress data. Let be the mean of the increasing disturbance vector of the t-th stress data point. and Let j and (j-1) be the j-th and (j-1)-th elements in the increasing disturbance vector of the t-th stress data, respectively. denoted as the number of elements in the incremental disturbance vector of the t-th stress data, where the vibration disturbance characteristic values ​​of all modal vectors corresponding to the sliding window of each stress data are arranged in ascending order to form the incremental disturbance vector of each stress data.

[0016] Preferably, the step of acquiring the sudden deviation of each stress data point within the stress sequence and detecting sudden deviation anomalies to extract stress anomaly data includes:

[0017] The step variation disturbance degree of all stress data within the sliding window of each stress data in the stress sequence is used to form the step variation disturbance sequence of each stress data according to the time sequence. The method for calculating the sudden deviation degree of each stress data in the stress sequence is as follows:

[0018] In the formula, The sudden deviation of the t-th stress data point in the stress sequence. For normalization function, Let be the number of abrupt change points in the order-variable interference sequence of the t-th stress data. This refers to the k-th abrupt change point data in the order-variable interference sequence of the t-th stress data. Let be the order-variance degree preceding the k-th abrupt change point data in the order-variance interference sequence of the t-th stress data. Let be the mean of all abrupt change points in the order-variable disturbance sequence of the t-th stress data. Let be the mean of the order-variable interference sequence of the t-th stress data;

[0019] For sudden deviation anomalies in all stress data within a stress sequence, the stress data corresponding to the data points with sudden deviation anomalies are taken as stress anomaly data.

[0020] Preferably, the step of correcting each stress anomaly data further includes:

[0021] The calculation method for the stress correction values ​​of each stress anomaly data is as follows: ;

[0022] In the formula, Let i be the stress correction value for the i-th stress anomaly data. For the i-th stress anomaly data, Let be the degree of sudden deviation of the i-th stress anomaly data. is the mean of the stress sequence containing the i-th stress anomaly data.

[0023] Preferably, the method for extracting the directional wire harness is as follows: the mean value of the stress correction sequence of each wire harness is recorded as the first correction stress of each wire harness, the mean value of the stress correction sequence of the cable core is recorded as the second correction stress of the cable core, the first correction stress of all wire harnesses is divided by a threshold, and the wire harness corresponding to the first correction stress that is greater than the division threshold is taken as the directional wire harness.

[0024] Preferably, obtaining the directional degree of each directional wire bundle includes: taking any directional wire bundle as the directional wire bundle to be analyzed, recording the number of wire bundles whose first correction stress is greater than the second correction stress and is greater than or equal to the first correction stress of the directional wire bundle to be analyzed as the positive directional number, and recording the number of wire bundles whose first correction stress is greater than the second correction stress and is less than the first correction stress of the directional wire bundle to be analyzed as the negative directional number; and using the ratio of the positive directional number to the sum of the positive directional number and the negative directional number as the directional degree of the directional wire bundle to be analyzed.

[0025] Preferably, the method for obtaining the degree of convergence of the cable core is as follows: the number of directional wire bundles in all directional wire bundles whose first correction stress is greater than or equal to the second correction stress is recorded as the positive convergence number, the number of directional wire bundles whose first correction stress is less than the second correction stress is recorded as the negative convergence number, and the ratio of the positive convergence number to the sum of the positive convergence number and the negative convergence number is taken as the degree of convergence of the cable core.

[0026] Preferably, the adjustment of the wrapping tape tension of the wrapping machine during the preparation of the shielded data transmission cable further includes:

[0027] If the degree of convergence of the cable cores is greater than the average degree of convergence of all directional wire bundles, reduce the wrapping tension of the wrapping machine by 5-10%; otherwise, increase the wrapping tension of the wrapping machine by 5-10%.

[0028] This application also provides a shielded data transmission cable, which is manufactured by any of the shielded data transmission cable preparation methods described above.

[0029] As can be seen from the above, the shielded data transmission cable and its manufacturing method provided in this application have at least the following beneficial effects:

[0030] This application takes into account that the stress data on the cable may be affected by the vibration of machinery and equipment, resulting in sudden deviations. The prior art has not fully analyzed the sudden deviations caused by the vibration of machinery and equipment affecting the stress data of the cable, and cannot accurately correct the stress data on the cable, which will affect the accuracy of adjusting and compensating the tension of the wrapping tape.

[0031] This application extracts the modal vectors of stress data changes and accurately analyzes the influence characteristics of vibration interference based on the regularity and difference of data changes within the modal vectors. Furthermore, based on the influence characteristics of vibration interference, it extracts the step-variability characteristics of vibration interference in a short period of time, which more clearly reflects the complexity of stress data being affected by machine vibration interference. This facilitates a more accurate analysis of the sudden deviation characteristics of stress data, thereby enabling more accurate correction of stress data on cables.

[0032] Furthermore, this application takes into account that stress data may be affected by the vibration of machinery and equipment, resulting in sudden deviations. By accurately measuring the sudden deviations of stress data through the step-variability characteristics of vibration interference, it is beneficial to accurately correct stress data with large sudden deviations in the future, and avoid affecting the accuracy of adaptive compensation for the wrapping tension of the wrapping machine.

[0033] Meanwhile, this application accurately corrects stress anomaly data by exploiting the sudden deviation characteristics of stress anomaly data, thereby reducing the impact of vibration interference on stress data and enabling stress data to accurately reflect the cable gathering characteristics, thus improving the accuracy of adjusting and compensating for tape tension. Attached Figure Description

[0034] To more clearly illustrate the technical solutions and advantages 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This application provides a flowchart of the steps involved in the preparation of a shielded data transmission cable. Detailed Implementation

[0036] To further illustrate the technical means and effects adopted by this application to achieve the intended purpose of the invention, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a shielded data transmission cable and its preparation method according to this application. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0037] Unless otherwise specified and limited, terms such as “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a circuit structure, article, or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the article or device that includes said element. Furthermore, the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items. All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0038] The following description, in conjunction with the accompanying drawings, details a specific scheme for a shielded data transmission cable and its preparation method provided in this application.

[0039] Please see Figure 1 The diagram illustrates a flowchart of a method for manufacturing a shielded data transmission cable according to an embodiment of this application, including the following steps:

[0040] Step 1: Draw the wire core using a wire drawing machine, extrude the molten insulating material into a shape and wrap it around the outer layer of the wire core to obtain an insulated wire core; gather multiple insulated wire cores together to form a wire bundle, and twist the multiple wire bundles into a shape to obtain a cable core; obtain the stress data of each wire bundle and cable core, and obtain the stress sequence of each wire bundle and cable core respectively.

[0041] As an infrastructure for information transmission, shielded data transmission cables must avoid continuous stress imbalance during the wrapping process to ensure their reliability.

[0042] First, the wire core is drawn using a wire drawing machine and then extruded and molded using molten insulating material, which is then evenly wrapped around the outer layer of the wire core to obtain an insulated wire core. Next, multiple insulated wire cores are bundled together to form individual wire bundles, and stress data for each bundle is collected using a fiber optic stress sensor with a sampling rate of 100Hz and a collection time of 1 minute. Finally, multiple wire bundles are twisted and molded using a de-twisting machine to obtain a cable core, and stress data for the cable core is collected using a fiber optic stress sensor, with the sampling rate and collection time remaining the same as above.

[0043] Furthermore, in order to facilitate accurate correction of the stress data and thus more accurately adapt to the tension of the wrapping machine, the stress data of each wire harness and the stress data of the cable core are sorted in chronological order at all acquisition moments during the data acquisition process to obtain the stress sequence of each wire harness and the stress sequence of the cable core.

[0044] Step 2: For each stress data point in any stress sequence, construct a sliding window centered on each stress data point. Perform modal decomposition on all stress data points within the sliding window to obtain each modal component. Based on the variation regularity of each modal component and the variation trend of the data within the modal component, obtain the vibration disturbance characteristic value of each modal component. By analyzing the average level and differences of the vibration disturbance characteristic values ​​of all modal components extracted within a short time range of each stress data, obtain the step disturbance degree of each stress data point in the stress sequence.

[0045] Because stress data during cable fabrication can be affected by vibrations from machinery, the stress data may not accurately reflect the cable's bonding characteristics, thus hindering accurate adaptive compensation for the wrapping tape tension. Therefore, to more accurately compensate for the wrapping tape tension, avoid high electric field concentration in the wrapped cable, and ensure excellent mechanical and physical properties, it is necessary to fully consider the sudden deviations caused by machinery vibrations and to correct the stress data on the cable.

[0046] Therefore, in this embodiment, local analysis will be performed on all stress data within a short time range for each stress data. Preferably, in this embodiment, taking any stress sequence as an example, each stress data in the stress sequence is used as the central element, and a sliding window of size 1×K is set. If there are missing elements in the sliding window, the mean filling technique is used to fill the missing elements. The stress data in the sliding window form the sliding window sequence of each stress data, where K is an odd number. In this embodiment, K is 101, and the implementer can adaptively select the value.

[0047] Furthermore, in order to analyze the impact of vibration disturbance on stress data within the sliding window sequence, the sliding window sequence of each stress data is input into a mode decomposition algorithm. The mode decomposition algorithm can be variational mode decomposition or empirical mode decomposition. In this embodiment, empirical mode decomposition is used to adaptively decompose the sliding window sequence to obtain the mode vectors of each sliding window sequence. The mode vectors reflect the modal component characteristics of stress data changes, which is beneficial for accurately analyzing the impact of vibration disturbance on stress data.

[0048] Under normal circumstances, the stress data on cables exhibits a strong regularity. However, the vibration interference from machinery and equipment can disrupt this regularity. The smaller the regularity of the data changes within each modal vector and the greater the difference in data changes, the more the modal component changes under the influence of vibration interference are reflected. In this case, it is easier to cause errors in the stress data. Therefore, it is necessary to accurately correct the abnormal stress data to improve the accuracy of subsequent adaptive compensation of the wrapping tape tension of the wrapping machine.

[0049] Based on the above analysis, the information entropy of each modal vector is calculated. The information entropy reflects the degree of disorder in the data information within the modal vector. The higher the degree of disorder, the smaller the regularity of the data information changes. At the same time, the first-order difference vector of each modal vector is calculated, and the mean of the absolute values ​​of all elements within the first-order difference vector is denoted as the first mean in this embodiment. The first mean reflects the magnitude of the difference in data changes within the modal vector. The greater the difference, the less it conforms to the stability of stress data changes, and the greater the influence of vibration disturbance on the modal vector.

[0050] Therefore, in this embodiment, the exponentially normalized result of the product of the information entropy and the first mean is used as the vibration interference feature value of each modal vector. The vibration interference feature value reflects the influence characteristics of each modal vector on vibration interference. The greater the influence characteristics of the modal vector on vibration interference, the more likely it is to cause serious error interference to the stress data, thereby causing abnormal changes in the stress data on the cable.

[0051] Furthermore, the vibration interference characteristic values ​​of all modal vectors corresponding to each stress data sliding window are arranged in ascending order to form an increasing interference vector for each stress data. The increasing interference vector reflects the increasing change of the vibration interference characteristics of the stress data in a short period of time. If the data in the increasing interference vector exhibits a higher degree of step change and the overall vibration interference characteristics are more significant, it indicates that the step change of the vibration interference in a short period of time is stronger, the interference effect on the stress data measured by the sensor is more complex, and the stress data needs to be corrected more accurately.

[0052] Based on the above analysis, the step variation interference degree of each stress data in the stress sequence is calculated:

[0053] ;

[0054] In the formula, Let be the order variation interference degree of the t-th stress data. Let be the mean of the increasing disturbance vector of the t-th stress data point. and Let j and (j-1) be the j-th and (j-1)-th elements in the increasing disturbance vector of the t-th stress data, respectively. denoted as the number of elements in the increasing disturbance vector of the t-th stress data.

[0055] Understandably, the step-variation interference degree is used to reflect the step-variation characteristics of vibration interference in a short period of time. The greater the step-variation characteristics of vibration interference, the more complex the influence of vibration interference on the stress data at this time is, and the more likely it is to affect the accuracy of stress data measurement on the cable. It is necessary to accurately correct the stress data to avoid affecting the accuracy of adaptive compensation of the wrapping tape tension of the wrapping machine.

[0056] Step 3: Based on the degree of abrupt change and the characteristics of abrupt change in the step disturbance of all stress data within the sliding window of each stress data, obtain the sudden deviation degree of each stress data in the stress sequence, and detect the sudden deviation degree anomaly to extract stress anomaly data.

[0057] Furthermore, the step variation interference degree of all stress data within the sliding window of each stress data in the stress sequence is arranged in chronological order to form the step variation interference sequence of each stress data in the stress sequence. The greater the sudden change in the data within the step variation interference sequence, and the greater the deviation of the sudden change data from the average level, the more it indicates that the stress data is affected by vibration interference and produces a sudden deviation. The more necessary it is to correct the stress data to avoid affecting the accuracy of adaptive compensation for the wrapping machine's tape tension.

[0058] To analyze the abrupt deviation characteristics of each stress data point in the stress sequence, the step-variation interference sequence of each stress data point in the stress sequence is input into the Bernaola Galvan segmentation algorithm. The Bernaola Galvan segmentation algorithm is used to obtain all abrupt change points in the step-variation interference sequence. The Bernaola Galvan segmentation algorithm is a well-known technique and will not be elaborated further.

[0059] Based on the above analysis, the abrupt deviation of each stress data point in the stress sequence is calculated:

[0060] ;

[0061] In the formula, The sudden deviation of the t-th stress data point in the stress sequence. For normalization function, Let be the number of abrupt change points in the order-variable interference sequence of the t-th stress data. This refers to the k-th abrupt change point data in the order-variable interference sequence of the t-th stress data. Let be the order-variance degree preceding the k-th abrupt change point data in the order-variance interference sequence of the t-th stress data. Let be the mean of all abrupt change points in the order-variable disturbance sequence of the t-th stress data. Let be the mean of the step-variable interference sequence of the t-th stress data.

[0062] Understandably, sudden deviation reflects the characteristics of sudden deviation caused by vibration interference in stress data. The greater the sudden deviation, the greater the error interference to the stress data, and the more accurate the stress data needs to be corrected so that the stress data can accurately reflect the cable gathering characteristics, thereby accurately compensating for the wrapping tape tension of the wrapping machine.

[0063] Furthermore, in order to accurately extract stress anomaly data from the stress sequence, the sudden deviation of all stress data in the stress sequence is input into the outlier detection algorithm. The outlier detection algorithm can be the HBOS anomaly detection algorithm or the LOF anomaly detection algorithm. In this embodiment, the HBOS anomaly detection algorithm is used to detect anomalies, obtain the data points where the sudden deviation is abnormal, and record the stress data corresponding to the data points where the sudden deviation is abnormal as stress anomaly data. The HBOS anomaly detection algorithm is a known technology, and the specific process will not be described in detail.

[0064] Step 4: Based on the deviation of each stress anomaly data in the stress sequence from the average level of all stress data, and combined with the sudden deviation of each stress anomaly data, correct each stress anomaly data to obtain the stress correction sequence for each wire harness and cable core.

[0065] Furthermore, the stress anomaly data can be accurately corrected by the degree of sudden deviation. The greater the degree of sudden deviation, the higher the degree of deviation of the stress anomaly data from the normal range. At this time, the intensity of the correction of the stress anomaly data should be greater.

[0066] Therefore, the stress correction value for each stress anomaly data in the stress sequence is calculated:

[0067] ;

[0068] In the formula, Let i be the stress correction value for the i-th stress anomaly data. For the i-th stress anomaly data, Let be the degree of sudden deviation of the i-th stress anomaly data. is the mean of the stress sequence containing the i-th stress anomaly data.

[0069] Furthermore, all stress anomaly data in the stress sequence are replaced with corresponding stress correction values ​​to obtain a stress correction sequence. The same method is used to correct each stress sequence in the same way to obtain the stress correction sequence of each wire harness and the stress correction sequence of the cable core.

[0070] By correcting the stress anomaly data in the stress sequence, the influence of vibration interference on the stress data is reduced, so that the stress data can accurately reflect the gathering characteristics between different wire bundles, which is conducive to achieving more accurate adaptive compensation of the wrapping tension of the wrapping machine.

[0071] Step 5: Extract the directional wire bundles by the average level of the stress correction sequence of each wire bundle and cable core, analyze the comparison results between each directional wire bundle and the cable core with respect to the average stress within the stress correction sequence, obtain the directional degree of each directional wire bundle and the convergence degree of the cable core, and adjust the wrapping tension of the wrapping machine during the preparation of the shielded data transmission cable by the deviation between the directional degree and the convergence degree, thereby completing the preparation of the shielded data transmission cable.

[0072] Furthermore, the mean value of the stress correction sequence of each wire harness is recorded as the first correction stress of each wire harness, and the mean value of the stress correction sequence of the cable core is recorded as the second correction stress of the cable core.

[0073] Furthermore, the first correction stress of all wire harnesses is input into the Otsu's inter-class variance algorithm, and the segmentation threshold is obtained using the Otsu's inter-class variance algorithm. The wire harnesses with the first correction stress greater than the segmentation threshold are taken as the pointing wire harnesses.

[0074] In this embodiment, for ease of understanding and description, any directional wire harness is taken as the directional wire harness to be analyzed. The number of wire harnesses in all wire harnesses whose first correction stress is greater than the second correction stress and is greater than or equal to the first correction stress of the directional wire harness to be analyzed is the positive directional number. The number of wire harnesses in all wire harnesses whose first correction stress is greater than the second correction stress and is less than the first correction stress of the directional wire harness to be analyzed is the negative directional number.

[0075] Therefore, the ratio of the number of positive pointers to the sum of the number of positive pointers and the number of negative pointers is used as the degree of pointing of the pointing harness to be analyzed.

[0076] By repeating the above process in this embodiment, each directional wire bundle is sequentially used as the directional wire bundle to be analyzed and calculated, and the directional degree of all directional wire bundles can be obtained.

[0077] Meanwhile, the number of directional wire harnesses in all directional wire harnesses whose first correction stress is greater than or equal to the second correction stress is defined as the positive convergence number, and the number of directional wire harnesses in all directional wire harnesses whose first correction stress is less than the second correction stress is defined as the negative convergence number. The ratio of the positive convergence number to the sum of the positive convergence number and the negative convergence number is used as the convergence degree of the cable core.

[0078] Furthermore, based on the degree of convergence of the cable cores and the directionality of each wire bundle, the wrapping tape tension of the wrapping machine is adaptively compensated. Preferably, in this embodiment, if the degree of convergence of the cable cores is greater than the average of the directionality of all directional wire bundles, the wrapping tape tension of the wrapping machine is reduced by 5-10%, and in this embodiment, the wrapping tape tension is reduced by 7%; otherwise, the wrapping tape tension of the wrapping machine is increased by 5-10%, and in this embodiment, the wrapping tape tension is increased by 7%.

[0079] Furthermore, after adaptive compensation of the wrapping tape tension of the wrapping machine, the cable core is wrapped with aluminum foil by the wrapping machine to form a wrapped cable core. Then, the wrapped cable core is braided by the braiding machine to form a cable shielding layer, and then extruded by the extruder to obtain a shielded data transmission cable. The specific process can be achieved by existing technology, and will not be described in detail in this embodiment.

[0080] Based on the same inventive concept as the above methods, this application also provides a shielded data transmission cable, which is manufactured by any of the shielded data transmission cable preparation methods described above.

[0081] It is understood that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, the above description focuses on specific embodiments of this specification. Additionally, the processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired results. In some implementations, multitasking and parallel processing are possible or may be advantageous.

[0082] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0083] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Any equivalent structural or procedural transformations made based on the description and drawings of this application, or direct or indirect applications in other related technical fields, are similarly included within the protection scope of this application.

Claims

1. A method of making a shielded data transmission cable, characterized by, The method comprises the following steps: Drawing the core wire through a wire drawing machine, extruding the insulating material in a molten state to form a layer outside the core wire to obtain an insulated core wire; bundling a plurality of insulated core wires to form a wire bundle, and twisting a plurality of wire bundles to form a cable core to obtain stress data of each wire bundle and the cable core, and obtaining a stress sequence of each wire bundle and the cable core; For each stress data in any stress sequence, a sliding window is constructed with the stress data as the center, modal decomposition is performed on all stress data in the sliding window of each stress data to obtain each modal component, vibration interference characteristic values of each modal component are obtained according to the change regularity of each modal component and the change trend of the data in the modal component, the average level and the difference of the vibration interference characteristic values of all modal components extracted in a short time range of each stress data are obtained to obtain the order change interference degree of each stress data in the stress sequence; Based on the sudden change degree and sudden change deviation characteristics of the order change interference degrees of all stress data in the sliding window of each stress data, the sudden deviation degree of each stress data in the stress sequence is obtained, and the sudden deviation degree is abnormally detected to extract stress abnormal data; According to the deviation of each stress abnormal data in the stress sequence from the average level of all stress data, and in combination with the sudden deviation degree of each stress abnormal data, the stress correction sequence of each wire bundle and the cable core is obtained by correcting each stress abnormal data. The average level of the stress correction sequence of each wire bundle and the cable core is used to extract a pointing wire bundle, the comparison result between each pointing wire bundle and the cable core with respect to the stress average in the stress correction sequence is analyzed, the pointing degree of each pointing wire bundle and the bundling degree of the cable core are obtained, and the wrapping tension of the wrapping machine in the preparation process of the shielding data transmission cable is adjusted through the deviation between the pointing degree and the bundling degree, thereby completing the preparation of the shielding data transmission cable. The calculation method of the order change interference degree of each stress data in the stress sequence is: ； wherein, is the step change disturbance degree of the tth stress data, is the mean value of the increasing disturbance vector of the tth stress data, and are the jth and j-1th elements in the increasing disturbance vector of the tth stress data, respectively, is the number of elements in the increasing disturbance vector of the tth stress data, wherein the vibration disturbance eigenvalues of the sliding window of each stress data corresponding to all modal vectors are arranged in ascending order to form the increasing disturbance vector of each stress data. The method for obtaining the sudden deviation degree of each stress data in the stress sequence, and abnormally detecting the sudden deviation degree to extract stress abnormal data comprises: The order change interference degrees of all stress data in the sliding window of each stress data in the stress sequence are sequentially composed to form an order change interference sequence of each stress data, and the calculation method of the sudden deviation degree of each stress data in the stress sequence is: ; wherein is the abruptness deviation of the tth stress data in the stress sequence, is a normalization function, is the number of abrupt points in the step disturbance sequence of the tth stress data, is the kth abrupt point data in the step disturbance sequence of the tth stress data, is the previous step disturbance of the kth abrupt point data in the step disturbance sequence of the tth stress data, is the mean of all abrupt point data in the step disturbance sequence of the tth stress data, is the mean of the step disturbance sequence of the tth stress data; The sudden deviation degrees of all stress data in the stress sequence are abnormally detected, and the stress data corresponding to the data point with abnormal sudden deviation degree is taken as the stress abnormal data.

2. A method of making a shielded data transmission cable as set forth in claim 1, wherein, The method for obtaining the vibration interference characteristic value of each modal component is: The information entropy of each modal vector is calculated, the mean value of the absolute values of all elements in the first-order difference vector of each modal vector is calculated, the exponential normalization result of the product of the two calculation results is taken as the vibration interference characteristic value of each modal vector.

3. A method of making a shielded data transmission cable as defined in claim 1, wherein, The method for correcting each stress abnormal data further comprises: The calculation method of the stress correction value of each stress anomaly data is: ; In the formula, is a stress correction value of the i-th stress anomaly data, is the i-th stress anomaly data, is a burst deviation degree of the i-th stress anomaly data, is a mean value of a stress sequence in which the i-th stress anomaly data is located.

4. A method of making a shielded data transmission cable as set forth in claim 1, wherein, The extraction method of the pointing wire bundle is that the mean value of the stress correction sequence of each wire bundle is taken as the first correction stress of each wire bundle, the mean value of the stress correction sequence of the cable core is taken as the second correction stress of the cable core, the first correction stress of all wire bundles is threshold segmented, and the wire bundle corresponding to the first correction stress greater than the segmentation threshold is taken as the pointing wire bundle.

5. A method of making a shielded data transmission cable as set forth in claim 4, wherein, The acquisition of the pointing degree of each pointing bundle comprises: taking any pointing bundle as a pointing bundle to be analyzed, taking the number of the pointing bundles in which the first correction stress is greater than the second correction stress and greater than or equal to the first correction stress of the pointing bundle to be analyzed as a positive pointing number, and taking the number of the pointing bundles in which the first correction stress is greater than the second correction stress and less than the first correction stress of the pointing bundle to be analyzed as a negative pointing number; and taking the ratio of the positive pointing number to the sum of the positive pointing number and the negative pointing number as the pointing degree of the pointing bundle to be analyzed.

6. A method of making a shielded data transmission cable as set forth in claim 4, wherein, The acquisition of the convergence degree of the cable core comprises: taking the number of the pointing bundles in which the first correction stress is greater than or equal to the second correction stress as a positive convergence number, and taking the number of the pointing bundles in which the first correction stress is less than the second correction stress as a negative convergence number; and taking the ratio of the positive convergence number to the sum of the positive convergence number and the negative convergence number as the convergence degree of the cable core.

7. A method of making a shielded data transmission cable as defined in claim 1, wherein, The method further comprises: If the convergence degree of the cable core is greater than the average of the pointing degrees of all the pointing bundles, the wrapping tension of the wrapping machine is reduced by 5-10%, otherwise, the wrapping tension of the wrapping machine is increased by 5-10%.

8. A shielded data transmission cable characterized by The shielded data transmission cable is made by the method of any one of claims 1-7.

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