Crimping pipe and wire core conductor matching degree detection method and device, terminal equipment and storage medium

Abstract

The invention discloses a crimping tube and core conductor matching degree detection method and device, terminal equipment and a storage medium, and belongs to the field of cable accessory detection, and the method comprises the steps: obtaining the conductor sectional area of a to-be-detected core conductor; the current generator is controlled to be started, and temperature data of the joint between the to-be-tested crimping tube and the to-be-tested wire core conductor are collected through the thermocouple; when the temperature data reaches a temperature threshold value, maintaining a current voltage effective value and a current effective value of the current generator, and obtaining a voltage phase of the voltage effective value and a current phase of the current effective value; calculating an AC resistance value based on the voltage phase and the current phase; in a preset database, a standard alternating current resistance interval matched with the temperature threshold value and the conductor sectional area is called; and based on the AC resistance value and the standard AC resistance interval, determining a matching result of the to-be-tested crimping tube and the to-be-tested wire core conductor.

Description

Technical Field

[0001] The present invention relates to the field of cable accessories detection, and in particular to a method, device, terminal equipment and storage medium for detecting the matching degree between a crimping tube and a core conductor. Background Art

[0002] In recent years, as high-voltage cables have evolved toward larger capacities and higher densities, the reliability of cable accessories has become increasingly crucial to grid safety. Crimp tubes, critical components in cable connections, have a direct impact on the current-carrying capacity and temperature-rise characteristics of cable systems due to their contact quality with the core conductors. The issue of proper compatibility between crimp tubes and core conductors is becoming increasingly prominent. Research has shown that poor crimping can distort current distribution in the contact area, leading to localized overheating and even insulation degradation.

[0003] Traditional testing methods rely primarily on visual inspection of the fit between the crimp tube and the core conductor. However, visual inspection cannot quantify the microscopic matching characteristics of the contact interface, resulting in low accuracy in testing the fit between the crimp tube and the core conductor. Summary of the Invention

[0004] The present invention provides a method, device, terminal equipment and storage medium for detecting the matching degree between a crimped tube and a wire core conductor, which can solve the technical problem of low accuracy in the existing technology for detecting the matching degree between a crimped tube and a wire core conductor.

[0005] The present invention provides a method for detecting the matching degree between a crimping tube and a core conductor, which is applied to an AC resistance detection system. The AC resistance detection system includes: a current generator, a thermocouple, a crimping tube to be tested, and a core conductor to be tested; the crimping tube to be tested is wrapped around the outside of the core conductor to be tested, the current generator is connected to the core conductor to be tested, and the thermocouple is arranged in the crimping tube to be tested;

[0006] The method for detecting the matching degree between the crimping tube and the core conductor includes:

[0007] Obtaining the conductor cross-sectional area of ​​the core conductor to be tested;

[0008] Controlling the current generator to start, so that the current generator performs a current-adding and temperature-raising operation on the core conductor to be measured, and collecting temperature data of the connection between the pressure-connecting pipe to be measured and the core conductor to be measured through the thermocouple;

[0009] When the temperature data reaches a temperature threshold, maintaining the current effective value of voltage and effective value of current of the current generator, obtaining a voltage phase of the effective value of voltage, and a current phase of the effective value of current; calculating an AC resistance value based on the voltage phase and the current phase; and retrieving a standard AC resistance interval that matches the temperature threshold and the cross-sectional area of ​​the conductor from a preset database;

[0010] A matching result between the pressure connection pipe to be tested and the core conductor to be tested is determined based on the AC resistance value and the standard AC resistance range.

[0011] Furthermore, the AC resistance detection system also includes: two fasteners; each of the fasteners is respectively arranged on two side areas of the core conductor to be tested that are not wrapped by the pressure tube to be tested; the current generator is connected to the core conductor to be tested through the fasteners.

[0012] Furthermore, before controlling the current generator to start, the method further includes:

[0013] Obtain the nut torque of each fastener;

[0014] Inputting the nut torque into a preset clamp pressure calculation formula to obtain the pressure of each fastener on the wire core conductor;

[0015] When the pressure of each fastener on the core conductor meets the pressure requirement, perform the next operation;

[0016] Otherwise, adjust the nut torque until the pressure of each fastener on the core conductor meets the pressure requirements.

[0017] Furthermore, the clamp pressure calculation formula includes:

[0018]

[0019] Where, T is the nut torque; F is the pressure of the fastener on the core conductor; P is the pitch; μ thread is the thread friction coefficient; d avg is the average diameter of the thread; μ bearing is the friction coefficient of the nut support surface; D bearing is the equivalent friction diameter of the nut support surface.

[0020] Furthermore, the acquisition of the database includes:

[0021] Obtaining a plurality of conductor core samples; wherein the crimping tube sample is wrapped around the outside of the conductor core sample;

[0022] Selecting a plurality of target conductor core samples with the same conductor cross-sectional area from the conductor core samples; wherein the conductor cross-sectional areas of different groups of target conductor core samples are different; and each group of target conductor core samples includes a plurality of conductor core samples;

[0023] In each group of target conductor core samples, several groups of AC resistance sample values ​​are collected at different temperature thresholds for the crimped portion corresponding to each conductor core sample and the crimp tube sample. Based on the group of AC resistance sample values ​​corresponding to each temperature threshold, the fitted envelope equation, and the normal distribution probability, the standard AC resistance range corresponding to each temperature threshold is determined; wherein different groups of AC resistance sample values ​​correspond to different temperatures;

[0024] The standard AC resistance ranges of different groups of target conductor core samples at each temperature threshold are summarized to obtain a database.

[0025] Furthermore, the fitting envelope equation includes:

[0026]

[0027] Where P is the probability of an AC resistance value occurring at a temperature threshold in the crimped portion between the conductor core sample and the crimped tube sample, x is the AC resistance value at a temperature threshold in the crimped portion between the conductor core sample and the crimped tube sample, and σ and μ are fitting coefficients.

[0028] Furthermore, the AC resistance value includes: a first AC resistance value, a second AC resistance value, and a third AC resistance value; the temperature threshold includes: a first temperature threshold, a second temperature threshold, and a third temperature threshold; the standard AC resistance interval includes: a first standard AC resistance interval, a second standard AC resistance interval, and a third standard AC resistance interval; the first AC resistance value and the first standard AC resistance interval respectively correspond to the first temperature threshold, the second AC resistance value and the second standard AC resistance interval respectively correspond to the second temperature threshold, and the third AC resistance value and the third standard AC resistance interval respectively correspond to the third temperature threshold;

[0029] The determining, based on the AC resistance value and the standard AC resistance range, a matching result between the pressure-sensitive connecting pipe to be tested and the core conductor to be tested includes:

[0030] Determine whether the AC resistance value is within the standard AC resistance range;

[0031] If the first AC resistance value is within the first standard AC resistance range, the second AC resistance value is within the second standard AC resistance range, and the third AC resistance value is within the third standard AC resistance range, then the matching result between the tested pressure tube and the tested core conductor is successful;

[0032] Otherwise, the matching result between the tested compression tube and the tested wire core conductor is a matching failure.

[0033] Another embodiment of the present invention further provides a device for detecting the degree of matching between a crimping tube and a core conductor, comprising: an AC resistance detection system, wherein the AC resistance detection system comprises: a current generator, a thermocouple, a crimping tube to be tested, and a core conductor to be tested; the crimping tube to be tested is wrapped around the outside of the core conductor to be tested, the current generator is connected to the core conductor to be tested, and the thermocouple is disposed in the crimping tube to be tested;

[0034] The device for detecting the matching degree between the crimping tube and the core conductor comprises: a data acquisition module, a data control module, a data calculation module and a result generation module;

[0035] The data acquisition module is used to obtain the conductor cross-sectional area of ​​the core conductor to be tested;

[0036] The data control module is used to control the current generator to start, so that the current generator performs a current-adding and temperature-raising operation on the core conductor to be tested, and collects temperature data of the connection between the pressure-connecting pipe to be tested and the core conductor to be tested through the thermocouple;

[0037] The data acquisition module is configured to maintain the current effective voltage value and effective current value of the current generator when the temperature data reaches a temperature threshold, obtain the voltage phase of the effective voltage value, and the current phase of the effective current value; calculate the AC resistance value based on the voltage phase and the current phase; and retrieve a standard AC resistance range that matches the temperature threshold and the conductor cross-sectional area from a preset database;

[0038] The result generating module is used to determine a matching result between the pressure connecting pipe to be tested and the core conductor to be tested based on the AC resistance value and the standard AC resistance range.

[0039] Another embodiment of the present invention also provides a terminal device, including: 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, the steps of the method for detecting the matching degree between the crimping tube and the core conductor provided by the present invention are implemented.

[0040] Another embodiment of the present invention further provides a computer-readable storage medium item, comprising: a stored computer program, which, when the computer program is running, controls the device where the computer-readable storage medium is located to execute the steps of the method for detecting the matching degree between the crimping tube and the core conductor provided by the present invention.

[0041] The following beneficial effects are achieved by implementing the present invention:

[0042] The present invention discloses a method for detecting the degree of matching between a crimping tube and a core conductor. The method detects the degree of matching between the crimping tube and the core conductor by using a preset AC resistance detection system. Based on a current generator, a current-adding and temperature-raising operation is performed on the core conductor to be tested. The core conductor increases its own temperature after conducting current. The temperature data of the connection between the crimping tube to be tested and the core conductor to be tested is collected by a thermocouple. When the temperature data reaches a temperature threshold, the voltage phase and the current phase are collected to calculate the AC resistance value of the core conductor under the current temperature threshold and the current conductor cross-sectional area. At the same time, the matching result between the crimping tube to be tested and the core conductor to be tested is determined in combination with a standard AC resistance interval in a database, thereby realizing the automation of the detection of the degree of matching between the crimping tube and the core conductor. Compared with the prior art of visually inspecting the degree of matching between the crimping tube and the core conductor, the present invention can improve the accuracy of the detection of the degree of matching between the crimping tube and the core conductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0044] Figure 1 1 is a flow chart of a method for detecting the matching degree between a crimping tube and a core conductor provided by an embodiment of the present invention;

[0045] Figure 2 This is a structural diagram of a device for detecting the degree of matching between a crimping tube and a core conductor provided by one embodiment of the present invention;

[0046] Figure 3 1 is a schematic structural diagram of an AC resistance detection system provided by an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of thermocouple layout provided by one embodiment of the present invention.

[0048] Reference numerals:

[0049] Programmable AC constant current source / high current generator 301, fastener 302, temperature compensation device 303, conductor core 304, crimping tube 305, temperature compensation power supply 306, PC / data acquisition software 307, paperless recorder 308, thermocouple lead 309, thermocouple 310. DETAILED DESCRIPTION

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0056] 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.

[0057] See also Figure 1 In order to solve the technical problem of low accuracy in the detection of matching degree between the pressure pipe and the core conductor in the existing technology, an embodiment of the present invention provides a method for detecting matching degree between the pressure pipe and the core conductor, which is applied to an AC resistance detection system. The AC resistance detection system, see Figure 3 , comprising: a current generator, a thermocouple, a pressure-transmitting pipe to be measured, and a core conductor to be measured; the pressure-transmitting pipe to be measured is wrapped around the outside of the core conductor to be measured, the current generator is connected to the core conductor to be measured, and the thermocouple is arranged in the pressure-transmitting pipe to be measured;

[0058] The method for detecting the matching degree between the crimping tube and the core conductor includes:

[0059] 101. Obtain the conductor cross-sectional area of ​​the core conductor to be tested.

[0060] In this embodiment, the current generator can be a programmable AC constant current source / high current generator, and the subject of the method for detecting the matching degree between the crimping tube and the core conductor can be a computer PC or data acquisition software, and the data recorded by the computer PC or data acquisition software is input into a paperless recorder, and the thermocouple can transmit the collected data to the paperless recorder through the thermocouple lead.

[0061] In this embodiment, the AC resistance detection system further includes: two fasteners; each of the fasteners is respectively arranged on two side areas of the core conductor to be tested that are not wrapped by the pressure tube to be tested; the current generator is connected to the core conductor to be tested through the fasteners.

[0062] In one specific embodiment, the AC resistance testing system further includes a temperature compensation device and a temperature compensation power supply. To compensate for heat loss from the exposed core conductors under test at both ends of the cable, the temperature compensation device is installed at each end of the cable and connected to a PC / data acquisition software via the temperature compensation power supply. The temperature compensation device can obtain the surface temperature of the exposed core conductors under test at both ends of the cable. The PC / data acquisition software system controls the temperature compensation device to heat the exposed core conductors under test at both ends of the cable by comparing the differences between temperature measurements at different sampling points, thereby eliminating the effects of axial heat transfer.

[0063] It is understandable that the function of the fastener is to ensure the electrical connection between the current generator and the core conductor to be tested. The nut torque of the fastener must be consistent with the nut torque under laboratory testing. Inconsistent torque will lead to inconsistent contact resistance between the fastener and the cable, increasing the error of the AC resistance test value.

[0064] 102. Control the current generator to start, so that the current generator performs a current-adding and temperature-raising operation on the core conductor to be measured, and collects temperature data of the connection between the pressure-connecting pipe to be measured and the core conductor to be measured through the thermocouple.

[0065] In a specific embodiment, see Figure 4 Set thermocouples at two temperature measurement points and three thermocouples at one temperature measurement point, distributed at positions 120° apart on the same section. The temperature measurement points are all located on the outer surface of the crimping tube. The selection of temperature measurement points should distinguish the tight compression area of ​​the cable crimping tube (such as Figure 4 , the position marked with 1) and the non-pressed area (such as Figure 4 The "pressed area" refers specifically to the location of the indentation or pressure track formed on the cable crimp tube due to mechanical stress after the crimping operation. Its notable feature is the localized contraction of the outer diameter of the tube in this area. Conversely, the "unpressed area" refers to the area on the crimp tube that is not affected by the crimping process and maintains its original geometric dimensions.

[0066] In this embodiment, before controlling the current generator to start, the method further includes:

[0067] Obtain the nut torque of each fastener;

[0068] Inputting the nut torque into a preset clamp pressure calculation formula to obtain the pressure of each fastener on the wire core conductor;

[0069] When the pressure of each fastener on the core conductor meets the pressure requirement, perform the next operation;

[0070] Otherwise, adjust the nut torque until the pressure of each fastener on the core conductor meets the pressure requirements.

[0071] In a specific embodiment, a torque wrench is used to obtain the nut torque of the fastener, and the pressure applied by the nut on the fasteners at both ends is indirectly measured in this way, and the pressure is equivalent to the pressure applied by the fasteners at both ends on the core conductor, ensuring that the pressure applied by the clamps at both ends on the core conductor is consistent under the same cable conductor cross-section (i.e., pressure requirement).

[0072] After installing the fasteners at both ends, use a torque wrench to obtain the nut torque data of the fasteners at both ends. Use the formula to calculate the pressure of the fasteners on the core conductor to perform fastener pressure verification. If the clamp pressure does not meet the requirements, tighten the nut (i.e., increase the nut torque) or loosen it (i.e., decrease the nut torque) and use the torque wrench to measure again until the fastener pressure meets the pressure requirements.

[0073] In this embodiment, the clamp pressure calculation formula includes:

[0074]

[0075] Where, T is the nut torque; F is the pressure of the fastener on the core conductor; P is the pitch; μ thread is the thread friction coefficient; d avg is the average diameter of the thread; μ bearing is the friction coefficient of the nut support surface; D bearing is the equivalent friction diameter of the nut support surface.

[0076] In a specific embodiment, the positions of the fasteners at both ends are selected so that the distances from the clamps at both ends to the edges of the fasteners are both 15 cm.

[0077] 103. When the temperature data reaches a temperature threshold, maintain the current effective value of voltage and effective value of current of the current generator, obtain the voltage phase of the effective value of voltage, and the current phase of the effective value of current; calculate the AC resistance value based on the voltage phase and the current phase; and retrieve a standard AC resistance range that matches the temperature threshold and the cross-sectional area of ​​the conductor from a preset database.

[0078] 104. Determine a matching result between the pressure-sensitive connecting pipe to be tested and the core conductor to be tested based on the AC resistance value and the standard AC resistance range.

[0079] In this embodiment, the acquisition of the database includes:

[0080] Obtaining a plurality of conductor core samples; wherein the crimping tube sample is wrapped around the outside of the conductor core sample;

[0081] Selecting a plurality of target conductor core samples with the same conductor cross-sectional area from the conductor core samples; wherein the conductor cross-sectional areas of different groups of target conductor core samples are different; and each group of target conductor core samples includes a plurality of conductor core samples;

[0082] In each group of target conductor core samples, several groups of AC resistance sample values ​​are collected at different temperature thresholds for the crimped portion corresponding to each conductor core sample and the crimp tube sample. Based on the group of AC resistance sample values ​​corresponding to each temperature threshold, the fitted envelope equation, and the normal distribution probability, the standard AC resistance range corresponding to each temperature threshold is determined; wherein different groups of AC resistance sample values ​​correspond to different temperatures;

[0083] The standard AC resistance ranges of different groups of target conductor core samples at each temperature threshold are summarized to obtain a database.

[0084] In a specific embodiment, all data in the database are acquired in a laboratory environment, and the construction and setting of the experimental test platform are consistent with the construction method of the AC resistance detection system.

[0085] It should be noted that the AC resistance sample values ​​of the crimped parts corresponding to the multiple sets of conductor core samples and crimped tube samples are substituted into the fitting equation, the fitting coefficient values ​​are calculated and substituted into the fitting equation to obtain the fitting envelope equation;

[0086] In this embodiment, the 800mm 2 Taking the cable conductor size of the cross section as an example, the AC resistance values ​​of the crimped parts corresponding to multiple sets of conductor core samples and crimping tube samples are selected as sample values. The AC resistance of each cable crimping part (i.e., the crimped part corresponding to the conductor core sample and the crimping tube sample) is measured at 40℃, 50℃, 60℃, 70℃, 80℃, and 90℃ (i.e., temperature thresholds). The multiple sets of AC resistance data are recorded as a measurement data set X = {x1, x2, ..., x n}, where x i It is the AC resistance value measured for a single group.

[0087] Calculate the arithmetic mean of the data set X as the fitted value of the mean parameter μ:

[0088]

[0089] Calculate the arithmetic mean of the data set X as the fitted value of the mean parameter σ:

[0090] According to the normal distribution probability statistics, the AC resistance interval (μ-3σ, μ+3σ) is selected as the AC resistance value of the crimped part matching the conductor core sample and the crimping tube sample under the corresponding temperature threshold;

[0091] The AC resistance of each cable crimping part (i.e., the crimping part corresponding to the conductor core sample and the crimping tube sample) is measured at 40°C, 50°C, 60°C, 70°C, 80°C, and 90°C (i.e., temperature thresholds) to construct a benchmark AC resistance database (i.e., the database described in the present invention).

[0092] In a specific embodiment, the database supports rapid iteration of matching models for different cable specifications and is compatible with IEC61238 and GB / T 14315 standards.

[0093] In this embodiment, the fitting envelope equation includes:

[0094]

[0095] Where P is the probability of an AC resistance value occurring at a temperature threshold in the crimped portion between the conductor core sample and the crimped tube sample, x is the AC resistance value at a temperature threshold in the crimped portion between the conductor core sample and the crimped tube sample, and σ and μ are fitting coefficients.

[0096] It can be understood that this embodiment is based on the statistical determination method of the normal distribution envelope, while overcoming the accidental error of single temperature point detection, and reducing the misjudgment rate.

[0097] In this embodiment, the AC resistance value includes: a first AC resistance value, a second AC resistance value, and a third AC resistance value; the temperature threshold includes: a first temperature threshold, a second temperature threshold, and a third temperature threshold; the standard AC resistance interval includes: a first standard AC resistance interval, a second standard AC resistance interval, and a third standard AC resistance interval; the first AC resistance value and the first standard AC resistance interval respectively correspond to the first temperature threshold, the second AC resistance value and the second standard AC resistance interval respectively correspond to the second temperature threshold, and the third AC resistance value and the third standard AC resistance interval respectively correspond to the third temperature threshold;

[0098] The determining, based on the AC resistance value and the standard AC resistance range, a matching result between the pressure-sensitive connecting pipe to be tested and the core conductor to be tested includes:

[0099] Determine whether the AC resistance value is within the standard AC resistance range;

[0100] If the first AC resistance value is within the first standard AC resistance range, the second AC resistance value is within the second standard AC resistance range, and the third AC resistance value is within the third standard AC resistance range, then the matching result between the tested pressure tube and the tested core conductor is successful;

[0101] Otherwise, the matching result between the tested compression tube and the tested wire core conductor is a matching failure.

[0102] In a specific embodiment, three temperature thresholds are randomly selected from 40°C, 50°C, 60°C, 70°C, 80°C, and 90°C as the three temperature thresholds used for detection. At each temperature threshold, a programmable AC constant current source / high current generator (i.e., the current generator described in the present invention) is used to increase current and heat the on-site cable crimping part. The temperature is determined as the average temperature of all temperature measurement thermocouple arrangement points reaching the current temperature threshold, and the temperature average value does not change by more than a fixed temperature difference threshold (which may be 0.5°C) within 10 minutes; the voltage effective value, the current effective value, and the phase difference between the two are obtained from the programmable AC constant current source / high current generator, and the AC resistance value is calculated;

[0103]

[0104] In the formula, U is the effective value of voltage, I is the effective value of current, and R is the AC resistance value. is the phase difference between voltage and current.

[0105] Based on the collected AC resistance values, standard AC resistance intervals corresponding to the same conductor cross-section and temperature threshold are selected from the benchmark AC resistance database for data comparison. If the AC resistance meets the interval requirements under the temperature thresholds used in the three tests, the crimping tube and the conductor core are matched.

[0106] As you can understand, this embodiment achieves closed-loop electromechanical parameter verification through the coordinated analysis of the mechanical preload-torque model and the AC resistor temperature characteristics. Furthermore, this embodiment utilizes theoretical calculation and torque wrench control technology to accurately replicate fixture pressure without complex equipment, improving testing efficiency.

[0107] like Figure 2 As shown, based on the above method embodiment, a corresponding device embodiment is provided;

[0108] An embodiment of the present invention provides a device for detecting the degree of matching between a crimping tube and a core conductor, which is applied to an AC resistance detection system. The AC resistance detection system includes: a current generator, a thermocouple, a crimping tube to be tested, and a core conductor to be tested; the crimping tube to be tested is wrapped around the outside of the core conductor to be tested, the current generator is connected to the core conductor to be tested, and the thermocouple is disposed in the crimping tube to be tested;

[0109] The device for detecting the matching degree between the crimping tube and the core conductor includes: a data acquisition module 201, a data control module 202, a data calculation module 203 and a result generation module 204;

[0110] The data acquisition module is used to obtain the conductor cross-sectional area of ​​the core conductor to be tested;

[0111] The data control module is used to control the current generator to start, so that the current generator performs a current-adding and temperature-raising operation on the core conductor to be tested, and collects temperature data of the connection between the pressure-connecting pipe to be tested and the core conductor to be tested through the thermocouple;

[0112] The data acquisition module is configured to maintain the current effective voltage value and effective current value of the current generator when the temperature data reaches a temperature threshold, obtain the voltage phase of the effective voltage value, and the current phase of the effective current value; calculate the AC resistance value based on the voltage phase and the current phase; and retrieve a standard AC resistance range that matches the temperature threshold and the conductor cross-sectional area from a preset database;

[0113] The result generating module is used to determine a matching result between the pressure connecting pipe to be tested and the core conductor to be tested based on the AC resistance value and the standard AC resistance range.

[0114] It can be understood that the above-mentioned device embodiment corresponds to the method embodiment of the present invention, which can implement the matching detection method between the crimping tube and the core conductor provided by any of the above-mentioned method embodiments of the present invention.

[0115] It should be noted that the device embodiments described above are merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. Furthermore, in the drawings of the device embodiments provided by the present invention, the connection relationship between modules indicates that they have a communication connection, which may be implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement the present invention without inventive effort.

[0116] Based on the above-mentioned embodiment of the method for detecting the matching degree of the crimped tube and the wire core conductor, another embodiment of the present invention provides a terminal 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, the method for detecting the matching degree of the crimped tube and the wire core conductor of any embodiment of the present invention is implemented.

[0117] For example, in this embodiment, the computer program may be divided into one or more modules, which are stored in the memory and executed by the processor to implement the present invention. The one or more module elements may be a series of computer program instruction segments capable of performing specific functions, and the instruction segments are used to describe the execution process of the computer program in the terminal device.

[0118] The terminal device may be a computing device such as a desktop computer, a notebook computer, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0119] 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. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the terminal device, connecting various parts of the entire terminal device using various interfaces and lines.

[0120] On the basis of the above-mentioned method embodiments, another embodiment of the present invention provides a computer-readable storage medium, comprising a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the method for detecting the matching degree between the crimping tube and the core conductor as described in any one of the above-mentioned method embodiments of the present invention.

[0121] Wherein, the module / unit integrated in the device / terminal equipment, if implemented in the form of a software functional unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor, it can implement the steps of the above-mentioned various method embodiments. Wherein, 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.

[0122] 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 detecting the matching degree between a crimping tube and a core conductor, characterized in that: Applicable to an AC resistance detection system, the AC resistance detection system includes: a current generator, a thermocouple, a pressure pipe to be measured, and a core conductor to be measured; the pressure pipe to be measured is wrapped around the outside of the core conductor to be measured, the current generator is connected to the core conductor to be measured, and the thermocouple is arranged in the pressure pipe to be measured; The method for detecting the matching degree between the crimping tube and the core conductor includes: Obtaining the conductor cross-sectional area of ​​the core conductor to be tested; Controlling the current generator to start, so that the current generator performs a current-adding and temperature-raising operation on the core conductor to be measured, and collecting temperature data of the connection between the pressure-connecting pipe to be measured and the core conductor to be measured through the thermocouple; When the temperature data reaches a temperature threshold, maintaining the current effective value of voltage and effective value of current of the current generator, obtaining a voltage phase of the effective value of voltage, and a current phase of the effective value of current; calculating an AC resistance value based on the voltage phase and the current phase; and retrieving a standard AC resistance interval that matches the temperature threshold and the cross-sectional area of ​​the conductor from a preset database; A matching result between the pressure connection pipe to be tested and the core conductor to be tested is determined based on the AC resistance value and the standard AC resistance range.

2. The method for detecting the matching degree between the crimping tube and the core conductor according to claim 1, wherein: The AC resistance detection system also includes: two fasteners; each fastener is respectively arranged on two side areas of the core conductor to be tested that are not wrapped by the pressure tube to be tested; the current generator is connected to the core conductor to be tested through the fasteners.

3. The method for detecting the matching degree between the crimping tube and the core conductor according to claim 2, wherein: Before controlling the current generator to start, the method further includes: Obtain the nut torque of each fastener; Inputting the nut torque into a preset clamp pressure calculation formula to obtain the pressure of each fastener on the wire core conductor; When the pressure of each fastener on the core conductor meets the pressure requirement, perform the next operation; Otherwise, adjust the nut torque until the pressure of each fastener on the core conductor meets the pressure requirements.

4. The method for detecting the matching degree between the crimping tube and the core conductor according to claim 3, wherein: The clamp pressure calculation formula includes: Where, T is the nut torque; F is the pressure of the fastener on the core conductor; P is the pitch; μ thread is the thread friction coefficient; d avg is the average diameter of the thread; μ bearing is the friction coefficient of the nut support surface; D bearing is the equivalent friction diameter of the nut support surface.

5. The method for detecting the matching degree between the crimping tube and the core conductor according to claim 4, wherein: The acquisition of the database includes: Obtaining a plurality of conductor core samples; wherein the crimping tube sample is wrapped around the outside of the conductor core sample; Selecting a plurality of target conductor core samples with the same conductor cross-sectional area from the conductor core samples; wherein the conductor cross-sectional areas of different groups of target conductor core samples are different; and each group of target conductor core samples includes a plurality of conductor core samples; In each group of target conductor core samples, several groups of AC resistance sample values ​​are collected at different temperature thresholds for the crimped portion corresponding to each conductor core sample and the crimp tube sample. Based on the group of AC resistance sample values ​​corresponding to each temperature threshold, the fitted envelope equation, and the normal distribution probability, the standard AC resistance range corresponding to each temperature threshold is determined; wherein different groups of AC resistance sample values ​​correspond to different temperatures; The standard AC resistance ranges of different groups of target conductor core samples at each temperature threshold are summarized to obtain a database.

6. The method for detecting the matching degree between the crimping tube and the core conductor according to claim 5, characterized in that: The fitting envelope equation includes: Where P is the probability of an AC resistance value occurring at a temperature threshold in the crimped portion between the conductor core sample and the crimped tube sample, x is the AC resistance value at a temperature threshold in the crimped portion between the conductor core sample and the crimped tube sample, and σ and μ are fitting coefficients.

7. The method for detecting the matching degree between the crimping tube and the core conductor according to claim 6, wherein: The AC resistance value includes: a first AC resistance value, a second AC resistance value, and a third AC resistance value; the temperature threshold includes: a first temperature threshold, a second temperature threshold, and a third temperature threshold; the standard AC resistance interval includes: a first standard AC resistance interval, a second standard AC resistance interval, and a third standard AC resistance interval; the first AC resistance value and the first standard AC resistance interval respectively correspond to the first temperature threshold, the second AC resistance value and the second standard AC resistance interval respectively correspond to the second temperature threshold, and the third AC resistance value and the third standard AC resistance interval respectively correspond to the third temperature threshold; The determining, based on the AC resistance value and the standard AC resistance range, a matching result between the pressure-sensitive connecting pipe to be tested and the core conductor to be tested includes: Determine whether the AC resistance value is within the standard AC resistance range; If the first AC resistance value is within the first standard AC resistance range, the second AC resistance value is within the second standard AC resistance range, and the third AC resistance value is within the third standard AC resistance range, then the matching result between the tested pressure tube and the tested core conductor is successful; Otherwise, the matching result between the tested compression tube and the tested wire core conductor is a matching failure.

8. A device for detecting the matching degree between a crimping tube and a core conductor, characterized in that: Applicable to an AC resistance detection system, the AC resistance detection system includes: a current generator, a thermocouple, a pressure pipe to be measured, and a core conductor to be measured; the pressure pipe to be measured is wrapped around the outside of the core conductor to be measured, the current generator is connected to the core conductor to be measured, and the thermocouple is arranged in the pressure pipe to be measured; The device for detecting the matching degree between the crimping tube and the core conductor comprises: a data acquisition module, a data control module, a data calculation module and a result generation module; The data acquisition module is used to obtain the conductor cross-sectional area of ​​the core conductor to be tested; The data control module is used to control the current generator to start, so that the current generator performs a current-adding and temperature-raising operation on the core conductor to be tested, and collects temperature data of the connection between the pressure-connecting pipe to be tested and the core conductor to be tested through the thermocouple; The data acquisition module is configured to maintain the current effective voltage value and effective current value of the current generator when the temperature data reaches a temperature threshold, obtain the voltage phase of the effective voltage value, and the current phase of the effective current value; calculate the AC resistance value based on the voltage phase and the current phase; and retrieve a standard AC resistance range that matches the temperature threshold and the conductor cross-sectional area from a preset database; The result generating module is used to determine a matching result between the pressure connecting pipe to be tested and the core conductor to be tested based on the AC resistance value and the standard AC resistance range.

9. A terminal 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. When the processor executes the computer program, the method for detecting the matching degree between the crimping tube and the core conductor according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that include: A stored computer program, wherein when the computer program is run, the device where the computer-readable storage medium is located is controlled to execute the method for detecting the matching degree between the crimping tube and the core conductor according to any one of claims 1 to 7.

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