Method and device for determining interface pressure of cable accessory

Abstract

The invention discloses a method and a device for determining interface pressure of a cable accessory. The method comprises the steps that accessory parameters of a cable accessory before assembly are obtained, the cable accessory is an accessory needing to be assembled on a target cable, and the target cable is a cable needing to be subjected to first interface pressure detection; attribute information of an outer sleeve is determined according to the accessory parameters, the outer sleeve is used for fixing a pressure sensor, and the pressure sensor is used for measuring second interface pressure between the cable accessory and the outer sleeve; after it is determined that the pressure sensor is fixed between the cable accessory and the outer sleeve, the cable accessory is installed on a target cable; after it is determined that the cable accessory is installed on the target cable, triggering the pressure sensor to obtain second interface pressure; and determining the first interface pressure according to the second interface pressure. According to the invention, the technical problem that lossless on-line measurement of the interface pressure between the cable accessory and the body cannot be realized under the condition that the original insulation structure is not damaged in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power cable accessories, and in particular to a method and device for determining the interface pressure of a cable accessory. Background Art

[0002] Power cables serve as the backbone of modern power transmission networks, and their operational reliability is crucial to grid stability. Cable accessories, including terminals and intermediate connectors, are essential components of cable lines, connecting cables to other electrical equipment or facilitating transitions between cable lines. The interface pressure between cable accessories and the cable itself directly impacts the accessory's sealing properties and electric field distribution, ultimately impacting the long-term operational safety and service life of the cable system.

[0003] The interface pressure between the cable accessory and the body is a key parameter for evaluating the installation quality and operating status of cable accessories. Currently, the industry mainly uses three methods to measure this parameter:

[0004] 1) Built-in sensor method: When installing the cable accessory, a pressure sensor is pre-installed between the cable accessory and the cable body. This method can directly obtain the interface pressure value, but it has obvious disadvantages. Installing the sensor may damage the cable insulation structure and affect the cable's electrical performance. There may also be a mismatch between the service life of the sensor and the life of the cable accessory.

[0005] 2) Resistance strain measurement: A thin-walled aluminum tube replaces the cable body and a resistance strain gauge is attached to it. The interface pressure is indirectly calculated by measuring the strain. However, this method is limited by the replacement of the cable body material and the dielectric difference between the strain gauge and the cable accessories, making it difficult to accurately reflect the actual interface pressure state.

[0006] 3) Photoelasticity: This method uses a model made of photoelastic material and observes the birefringence effect of the model under force to infer the interface pressure. This method is mainly used in laboratory environments. It not only requires complex equipment and high technical requirements, but is also not practical for cable accessories in field operation because it is difficult to simulate the actual operating conditions of the cable.

[0007] Each of the aforementioned methods has limitations when measuring interface pressure on cable accessories. This is particularly true during cable system operation, where dynamic conditions such as load fluctuations and temperature cycling cause interface pressure variations, making effective online monitoring difficult with existing technologies. Therefore, developing a method for non-destructive online measurement of interface pressure between cable accessories and the cable body without damaging the original insulation structure has become a critical technical challenge. Summary of the Invention

[0008] The embodiments of the present invention provide a method and device for determining the interface pressure of a cable accessory, so as to at least solve the technical problem in the related art that it is impossible to achieve non-destructive online measurement of the interface pressure between the cable accessory and the body without destroying the original insulation structure.

[0009] According to one aspect of an embodiment of the present invention, a method for determining the interface pressure of a cable accessory is provided, comprising: obtaining accessory parameters of the cable accessory before assembly, wherein the cable accessory is an accessory that needs to be assembled on a target cable, the target cable is a cable that needs to undergo a first interface pressure detection, the first interface pressure is the interface pressure between the cable accessory and the target cable, and the accessory parameters are size parameters of the cable accessory; determining attribute information of an outer sleeve according to the accessory parameters, wherein the outer sleeve is used to fix a pressure sensor, and the pressure sensor is used to measure a second interface pressure between the cable accessory and the outer sleeve; after determining that the pressure sensor is fixed between the cable accessory and the outer sleeve, installing the cable accessory on the target cable; after determining that the cable accessory is installed on the target cable, triggering the pressure sensor to start to obtain the second interface pressure; and determining the first interface pressure according to the second interface pressure.

[0010] Optionally, obtaining the accessory parameters of the cable accessory before assembly includes: upon receiving an interface pressure measurement request, measuring the first inner radius value and the first outer radius value of the cable accessory before assembly by a length measuring component to obtain the accessory parameters.

[0011] Optionally, the attribute information of the outer sleeve is determined according to the accessory parameters, including: determining the second inner radius value of the outer sleeve according to the first outer radius value of the cable accessory in the accessory parameters; determining the second outer radius value of the outer sleeve according to the thickness of the outer sleeve and the second inner radius value; determining the material properties of the outer sleeve according to the material properties of the cable accessory.

[0012] Optionally, before determining the second outer radius value of the outer sleeve based on the thickness of the outer sleeve and the second inner radius value, the method for determining the interface pressure of the cable accessory also includes: obtaining the initial interface pressure of the cable accessory and the thickness range of the outer sleeve; and determining the thickness based on the initial interface pressure and the thickness range.

[0013] Optionally, obtaining the thickness range of the outer sleeve includes: determining a material model based on the material properties of the cable accessory, wherein the material model is used to simulate the outer sleeve; and simulating the outer sleeve using a finite element simulation method based on the material model to obtain the thickness range.

[0014] Optionally, after determining that the cable accessory is installed on the target cable, before triggering the pressure sensor to start to obtain the second interface pressure, the method for determining the cable accessory interface pressure also includes: determining an estimated value of the interface pressure between the outer sleeve and the cable accessory; and selecting the pressure sensor based on the estimated value of the interface pressure.

[0015] Optionally, the attachment parameter satisfies a first formula: Wherein, a0 represents the first inner radius value of the cable accessory before assembly, b0 represents the first outer radius value of the cable accessory before assembly, h represents the thickness of the outer sleeve, p represents the first interface pressure, σ r represents the radial stress of the cable accessory at the radial coordinate r.

[0016] Optionally, determining the first interface pressure according to the second interface pressure includes: equating the second interface pressure to the first interface pressure.

[0017] According to another aspect of an embodiment of the present invention, a device for determining the interface pressure of a cable accessory is also provided, comprising: a first acquisition unit, for acquiring accessory parameters of the cable accessory before assembly, wherein the cable accessory is an accessory that needs to be assembled on a target cable, the target cable is a cable that needs to undergo a first interface pressure test, the first interface pressure is the interface pressure between the cable accessory and the target cable, and the accessory parameters are size parameters of the cable accessory; a first determination unit, for determining attribute information of an outer sleeve based on the accessory parameters, wherein the outer sleeve is used to fix a pressure sensor, and the pressure sensor is used to measure a second interface pressure between the cable accessory and the outer sleeve; a processing unit, for installing the cable accessory on the target cable after determining that the pressure sensor is fixed between the cable accessory and the outer sleeve; a second acquisition unit, for triggering the pressure sensor to start after determining that the cable accessory is installed on the target cable to obtain the second interface pressure; and a second determination unit, for determining the first interface pressure based on the second interface pressure.

[0018] Optionally, the first acquisition unit includes: a first acquisition module, configured to measure a first inner radius value and a first outer radius value of the cable accessory before assembly by a length measuring component upon receiving an interface pressure measurement request, so as to obtain the accessory parameters.

[0019] Optionally, the first determination unit includes: a first determination module for determining the second inner radius value of the outer sleeve based on the first outer radius value of the cable accessory in the accessory parameters; a second determination module for determining the second outer radius value of the outer sleeve based on the thickness of the outer sleeve and the second inner radius value; and a third determination module for determining the material properties of the outer sleeve based on the material properties of the cable accessory.

[0020] Optionally, the device for determining the interface pressure of the cable accessory also includes: a second acquisition module, used to obtain the initial interface pressure of the cable accessory and the thickness range of the outer sleeve before determining the second outer radius value of the outer sleeve based on the thickness of the outer sleeve and the second inner radius value; and a fourth determination module, used to determine the thickness based on the initial interface pressure and the thickness range.

[0021] Optionally, the second acquisition module includes: a first determination submodule, used to determine a material model based on the material properties of the cable accessory, wherein the material model is used to simulate the outer sleeve; a simulation submodule, used to simulate the outer sleeve using a finite element simulation method based on the material model to obtain the thickness range.

[0022] Optionally, the device for determining the interface pressure of the cable accessory also includes: a third determination unit, used to trigger the pressure sensor to start after determining that the cable accessory is installed on the target cable, so as to determine the estimated interface pressure between the outer sleeve and the cable accessory before obtaining the second interface pressure; and a selection unit, used to select the pressure sensor according to the estimated interface pressure.

[0023] Optionally, the attachment parameter satisfies a first formula: Wherein, a0 represents the first inner radius value of the cable accessory before assembly, b0 represents the first outer radius value of the cable accessory before assembly, h represents the thickness of the outer sleeve, p represents the first interface pressure, σ r represents the radial stress of the cable accessory at the radial coordinate r.

[0024] Optionally, the second determining unit includes: an equivalent module, configured to equate the second interface pressure to the first interface pressure.

[0025] According to another aspect of an embodiment of the present invention, a cable accessory interface pressure determination system is provided. The cable accessory interface pressure determination system uses any one of the above-described methods for determining the cable accessory interface pressure.

[0026] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored program, wherein the program executes any one of the above-mentioned methods for determining the cable accessory interface pressure.

[0027] According to another aspect of an embodiment of the present invention, a processor is further provided, wherein the processor is configured to run a program, wherein the program, when running, executes any one of the above-mentioned methods for determining the cable accessory interface pressure.

[0028] According to another aspect of an embodiment of the present invention, a computer program product is provided, comprising computer instructions, which, when executed by a processor, execute any one of the above methods for determining the cable accessory interface pressure.

[0029] In an embodiment of the present invention, accessory parameters of a cable accessory before assembly are obtained, wherein the cable accessory is an accessory that needs to be assembled on a target cable, the target cable is a cable that needs to undergo a first interface pressure test, the first interface pressure is the interface pressure between the cable accessory and the target cable, and the accessory parameters are size parameters of the cable accessory; attribute information of an outer sleeve is determined based on the accessory parameters, wherein the outer sleeve is used to fix a pressure sensor, and the pressure sensor is used to measure a second interface pressure between the cable accessory and the outer sleeve; after determining that the pressure sensor is fixed between the cable accessory and the outer sleeve, the cable accessory is installed on the target cable; after determining that the cable accessory is installed on the target cable, the pressure sensor is triggered to start to obtain the second interface pressure; and the first interface pressure is determined based on the second interface pressure. The technical solution provided by the present invention realizes a non-invasive layout of an outer sleeve and a pressure sensor, and uses the interface pressure between the outer sleeve and the cable accessory collected by the pressure sensor between the outer sleeve and the cable accessory to determine the interface pressure between the cable accessory and the cable body, thereby achieving the effect of lossless transmission and collection of interface pressure information, thereby solving the technical problem in related technologies that it is impossible to realize lossless online measurement of the interface pressure between the cable accessory and the body without destroying the original insulation structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 This is a hardware structure block diagram of a mobile terminal for a method for determining cable accessory interface pressure according to an embodiment of the present invention;

[0032] Figure 2is a flow chart of a method for determining cable accessory interface pressure according to an embodiment of the present invention;

[0033] Figure 3 is a three-dimensional model diagram of the double-layer sleeve interface pressure measurement according to an embodiment of the present invention;

[0034] FIG4( a ) is a cross-section of a cable accessory and an outer sleeve according to an embodiment of the present invention Figure 1 ;

[0035] FIG4( b ) is a cross-section of a cable accessory and an outer sleeve according to an embodiment of the present invention Figure 2 ;

[0036] Figure 5 is a schematic diagram of a simulation model for non-destructive measurement of interface pressure of cable accessories based on a double-layer sleeve according to an embodiment of the present invention;

[0037] Figure 6 is a schematic diagram of simulation results of non-destructive measurement of interface pressure of a cable accessory based on a double-layer sleeve according to an embodiment of the present invention;

[0038] Figure 7 is a schematic diagram of a double-layer sleeve-based measurement system according to an embodiment of the present invention;

[0039] Figure 8 2 is a schematic diagram of a device for determining the interface pressure of a cable accessory according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0041] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] As described in the background, the related art suffers from the inability to achieve non-destructive online measurement of the interface pressure between a cable accessory and a cable body without damaging the original insulation structure. Embodiments of the present invention provide a method and apparatus for determining the interface pressure of a cable accessory, a system for determining the interface pressure of a cable accessory, a computer-readable storage medium, a processor, and a computer program product.

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0044] The method embodiments provided in the embodiments of the present invention can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 FIG. 1 is a hardware structure block diagram of a mobile terminal for determining a cable accessory interface pressure according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown) a processor 102 (the processor 102 may include but is not limited to a microprocessor MCU or a programmable logic device FPGA and other processing devices) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input and output device 108 for communication functions. It will be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 1 More or fewer components than shown, or with Figure 1 Different configurations shown.

[0045] Memory 104 can be used to store computer programs, such as application software programs and modules, such as the computer program corresponding to the cable accessory interface pressure determination method in the embodiments of the present invention. Processor 102 executes the computer programs stored in memory 104 to execute various functional applications and data processing, thereby implementing the aforementioned method. Memory 104 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, memory 104 may further include memory remote from processor 102, which can be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof. Transmission device 106 is used to receive or transmit data via a network. Specific examples of such networks may include a wireless network provided by the mobile terminal's telecommunications provider. In one example, transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to enable communication with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0046] Example 1

[0047] According to an embodiment of the present invention, a method embodiment of a method for determining the interface pressure of a cable accessory is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0048] Figure 2 FIG. 1 is a flow chart of a method for determining the interface pressure of a cable accessory according to an embodiment of the present invention. Figure 2 As shown, the method for determining the interface pressure of the cable accessory includes the following steps:

[0049] Step S202, obtaining the accessory parameters of the cable accessory before assembly, wherein the cable accessory is an accessory that needs to be assembled on the target cable, the target cable is a cable that needs to undergo a first interface pressure test, the first interface pressure is the interface pressure between the cable accessory and the target cable, and the accessory parameters are the size parameters of the cable accessory.

[0050] Cable accessories are optional components and devices used in power cable lines to connect, branch, terminate, or protect the cables. They are an integral part of the cable system, ensuring the electrical performance and mechanical stability of the cable in various application scenarios. The design and manufacture of cable accessories must take into account various factors, including the cable's operating voltage level, current capacity, insulation type, and operating environment, to ensure safe and reliable operation of the cable system.

[0051] Cable accessories are primarily divided into three categories: 1) Terminal Heads: These connect the cable ends to electrical equipment (such as transformers and switchgear). Their primary functions are electrical connection, electric field distribution control, and mechanical protection. Terminal heads must be designed to ensure a good seal to prevent external factors such as moisture and dust from affecting the cable joint.

[0052] 2) Intermediate Joints: These connect two cable segments to maintain continuity. Intermediate joints must not only ensure electrical connection reliability but also provide excellent insulation, ensuring the insulation strength of the connection is no less than that of the cable itself. These joints come in various types, including prefabricated, cold-shrink, heat-shrink, and cast-in-place.

[0053] 3) Branch Joints or Tee Boxes: These allow a cable line to branch at a specific point, forming a T- or Y-shaped junction. The design of a branch joint must consider the branch direction and angle while maintaining good electrical field control and mechanical strength.

[0054] Optionally, the cable accessory before assembly refers to the state of the cable accessory in a natural state.

[0055] Step S204: determining the property information of the outer sleeve according to the accessory parameters, wherein the outer sleeve is used to fix the pressure sensor, and the pressure sensor is used to measure the second interface pressure between the cable accessory and the outer sleeve.

[0056] Here, the outer sleeve may be selected according to the accessory parameters of the cable accessory, that is, the outer sleeve may be selected according to the material of the cable accessory, so that the cable accessory and the outer sleeve are made of the same material.

[0057] Figure 3 3D model diagram of the double-layer sleeve interface pressure measurement according to an embodiment of the present invention, as shown in FIG. Figure 3 As shown, the outer sleeve 302 can be produced using the same silicone rubber insulating material as the cable accessory 301 to be tested, ensuring that the inner diameter of the outer sleeve 302 is the same as the outer diameter of the cable accessory 301 in its natural state without expansion.

[0058] Optionally, the pressure sensor may be a thin film pressure sensor, which can be used to measure the interface pressure between the cable accessory and the outer sleeve, that is, the second interface pressure.

[0059] Step S206: After determining that the pressure sensor is fixed between the cable accessory and the outer sleeve, the cable accessory is installed on the target cable.

[0060] like Figure 3 As shown, the pressure sensor 303 can be attached to the outer layer of the cable accessory 301, and the outer sleeve 302 can be put on it to form a complete cable accessory interface pressure measurement system. The cable accessory can then be installed on the cable body 304 (i.e., the target cable) to analyze the stress and strain conditions inside the system.

[0061] Specifically, it will Figure 3 A cross section is taken from the middle position of the middle and outer sleeves 302 for study. Detailed description is omitted here and will be described in detail below.

[0062] Step S208: After determining that the cable accessory is installed on the target cable, trigger the pressure sensor to start to obtain a second interface pressure.

[0063] After determining that the cable accessory (including the outer sleeve and the thin film pressure sensor between the outer sleeve and the cable accessory) is installed on the target cable, the thin film pressure sensor is started to collect the interface pressure between the outer sleeve and the cable accessory, that is, the second interface pressure.

[0064] That is, the selected thin film pressure sensor is fixed on the periphery of the main insulating section of the cable accessory, and then the outer sleeve is sleeved on the outer layer so that the outer sleeve is in close contact with the cable accessory.

[0065] Step S210: determining the first interface pressure according to the second interface pressure.

[0066] Here, the interface pressure between the cable accessory and the cable body may be determined according to the second interface pressure.

[0067] As can be seen from the above, in an embodiment of the present invention, the accessory parameters of the cable accessory before assembly are obtained, wherein the cable accessory is an accessory that needs to be assembled on the target cable, the target cable is a cable that needs to perform a first interface pressure test, the first interface pressure is the interface pressure between the cable accessory and the target cable, and the accessory parameters are the size parameters of the cable accessory; the attribute information of the outer sleeve is determined according to the accessory parameters, wherein the outer sleeve is used to fix the pressure sensor, and the pressure sensor is used to measure the second interface pressure between the cable accessory and the outer sleeve; after determining that the pressure sensor is fixed between the cable accessory and the outer sleeve, the cable accessory is installed on the target cable; after determining that the cable accessory is installed on the target cable, the pressure sensor is triggered to start to obtain the second interface pressure; the first interface pressure is determined according to the second interface pressure, thereby realizing a non-invasive layout of the outer sleeve and the pressure sensor, and using the interface pressure between the outer sleeve and the cable accessory collected by the pressure sensor between the outer sleeve and the cable accessory to determine the interface pressure between the cable accessory and the cable body, thereby achieving the effect of lossless transmission and collection of interface pressure information.

[0068] Therefore, the above technical solution provided by the embodiment of the present invention solves the technical problem in the related art that it is impossible to achieve non-destructive online measurement of the interface pressure between the cable accessory and the body without destroying the original insulation structure.

[0069] According to the above embodiment of the present invention, obtaining the accessory parameters of the cable accessory before assembly includes: when receiving an interface pressure measurement request, measuring the first inner radius value and the first outer radius value of the cable accessory before assembly by a length measuring component to obtain the accessory parameters.

[0070] Here, the inner and outer radius a0 (ie, the first inner radius value), b0 (ie, the first outer radius value) and the length l of the main insulating part of the accessory before assembly can be measured using a caliper.

[0071] For example, vernier caliper measurements show that the connector's inner diameter in its natural, unassembled state is 23.78mm, and its outer radius is 45.5mm. Consulting the factory specifications for cable accessories reveals that within the connector's elastic deformation range (strain less than 150%), the rubber insulation's nominal elastic modulus, E, is 0.95MPa. A 60mm section of the main insulation was cut for assembly measurement.

[0072] The length measuring component is used to measure the inner and outer radius of the cable accessories before assembly, providing the necessary data basis for subsequent steps.

[0073] According to the above embodiment of the present invention, the attribute information of the outer sleeve is determined according to the accessory parameters, including: determining the second inner radius value of the outer sleeve according to the first outer radius value of the cable accessory in the accessory parameters; determining the second outer radius value of the outer sleeve according to the thickness of the outer sleeve and the second inner radius value; and determining the material properties of the outer sleeve according to the material properties of the cable accessory.

[0074] Optionally, the above attribute information may include but is not limited to inner and outer radius values and materials.

[0075] Here, we explain how the outer sleeve dimensions are determined, including its inner and outer radii, as well as its material properties, to match the cable accessories. This ensures that the sleeve can accurately secure the pressure sensor and perform measurements.

[0076] Here, the same material as the main insulation of the accessory is used to produce a cylindrical sleeve with an inner radius (i.e., the second radius value) of b0, an outer radius (second outer radius value) of b0+h, and a length of l', where l' can be a value shorter than l.

[0077] like Figure 3 As shown, according to the cable accessory 301 to be tested, the sleeve 302 is produced using the same silicone rubber insulating material as the cable accessory 301, ensuring that the inner diameter of the sleeve 302 is the same as the outer diameter of the cable accessory 301 in its natural state without expansion.

[0078] According to the above embodiment of the present invention, before determining the second outer radius value of the outer sleeve based on the thickness of the outer sleeve and the second inner radius value, the method for determining the interface pressure of the cable accessory also includes: obtaining the initial interface pressure of the cable accessory and the thickness range of the outer sleeve; and determining the thickness based on the initial interface pressure and the thickness range.

[0079] FIG4( a ) is a cross-section of a cable accessory and an outer sleeve according to an embodiment of the present invention Figure 1 , because the outer sleeve 401 in FIG4 (a) (ie, Figure 3 302) and cable accessories 402 (ie, Figure 3 301) uses the same material, and there is seamless close contact between the two, so when studying the radial stress and strain at the cross section, the two can be studied as a whole silicone rubber sleeve, that is, Figure 4 (b) (Figure 4 (b) is a cross-section of the cable accessory and the outer sleeve according to an embodiment of the present invention Figure 2 ) in the silicone rubber sleeve 405, and the inner layer 403 and the inner layer 404 both refer to Figure 3 The cable body 304 in.

[0080] In Figure 4(b), the ratio of the outer diameter to the inner diameter of the outer silicone rubber sleeve 405 is greater than 1.2, and the actual working conditions of the cable accessory after the sleeve is installed still meet the requirements of the plane strain assumption. Therefore, the plane strain thick-walled cylinder model can be used to solve the stress and strain of the microelement on the sleeve.

[0081] In this embodiment, when the outer sleeve thickness is 2-10 mm, the interface pressure between the outer sleeve and the cable accessory body is approximately 15% of the measured interface pressure. The factory-installed interface pressure for cable accessories is between 0.15 MPa and 0.25 MPa. Calculations show that this meets the range requirements of commercially available thin-film pressure sensors. Furthermore, the introduction of the sleeve has a minimal impact on the measured interface pressure, ensuring that the interface pressure between the cable accessory and the body remains within a reliable range.

[0082] Based on the sleeve thickness range determined above, a simulation model was established using Ansys Workbench software, and simulation was performed, with sleeve thicknesses ranging from 2mm to 8mm. Due to the need for precise measurement, the thin film pressure sensor should be completely wrapped by the outer sleeve during actual measurement, so its length needs to be greater than the size of the thin film piezoresistor, set to 30mm. The simulation results are as follows: Figure 5 ( Figure 5 Schematic diagram of a simulation model for non-destructive measurement of interface pressure of cable accessories based on a double-layer sleeve according to an embodiment of the present invention) and Figure 6 ( Figure 6 2 is a schematic diagram of the simulation results of non-destructive measurement of cable accessory interface pressure based on a double-layer sleeve according to an embodiment of the present invention.

[0083] according to Figure 5 and Figure 6 The results show that the thicker the outer sleeve, the greater the interface pressure between it and the cable accessory. Using a thin film pressure sensor to measure the interface pressure between the two is more accurate. However, if the outer sleeve is too thick, the interface pressure between the cable accessory and the body will increase excessively, exceeding the reliable range. Taking these two factors into consideration, the final outer sleeve thickness was selected to be 5mm.

[0084] According to the above embodiment of the present invention, obtaining the thickness range of the outer sleeve includes: determining a material model based on the material properties of the cable accessories, wherein the material model is used to simulate the outer sleeve; and simulating the outer sleeve using a finite element simulation method based on the material model to obtain the thickness range.

[0085] In this embodiment, during the finite element simulation, the silicone rubber material model used is the Yeoh model, and its model parameter C 10 =0.2486Mpa, C 20 =-5.575*10 -4 Mpa,C30 =8.389*10 -5 Mpa.

[0086] Finite element software is used here for simulation calculations (during the simulation calculations, the material of the cable accessories and sleeves is set to hyperelastic silicone rubber material, described using the Yeoh model, and the specific parameters of the model are as shown above. The cable insulation material is cross-linked polyethylene, and the cable conductor material is copper. Since this simulation is only for selecting a suitable sleeve size range and is not used to actually describe the measurement results, the influence of temperature on material parameters is not considered). The interface pressure values between the sleeve and the accessories after installation (this method can be applied to medium-voltage integrated prefabricated cable accessories) and between the accessories and the cable body are calculated to verify the reliability of the sleeve size.

[0087] According to the above embodiment of the present invention, after determining that the cable accessory is installed on the target cable, before triggering the pressure sensor to start to obtain the second interface pressure, the method for determining the interface pressure of the cable accessory also includes: determining an estimated value of the interface pressure between the outer sleeve and the cable accessory; and selecting a pressure sensor based on the estimated value of the interface pressure.

[0088] Here, we can select a suitable pressure sensor based on the estimated interface pressure value p after the accessory is installed (the manufacturer needs to estimate the initial interface pressure between the cable accessories after they are installed on the cable body based on experience). It should be noted that the interface pressure p between the sleeve and the accessory main insulation is ′ (i.e., the second interface pressure) is about one-third of the range of the thin film pressure sensor. Combined with the previous estimation of the interface pressure, the range of the thin film pressure sensor is selected as 0-4.4N.

[0089] Among them, the assembled accessories - thin film piezoresistor - outer sleeve system is installed on the cable body, and the measured value of the thin film pressure sensor at this time is read and substituted into the formula The interface pressure between the outer sleeve and the cable accessories can be measured by the thin film pressure sensor to calculate the real-time interface pressure between the cable accessories and the cable body, and describe its changing trend under the working condition.

[0090] According to the above embodiment of the present invention, the attachment parameters satisfy the first formula: Where a0 represents the first inner radius value of the cable accessory before assembly, b0 represents the first outer radius value of the cable accessory before assembly, h represents the thickness of the outer sleeve, p represents the first interface pressure, σ r Represents the radial stress of the cable accessory at the radial coordinate r.

[0091] In the embodiment of the present invention, the unknown quantities in the plane axisymmetric problem mainly include radial / tangential stress, radial / tangential strain and radial displacement, which are generally expressed as σ r , σ θ , ε r , ε θ , u, they should satisfy the basic equations and corresponding boundary conditions, and their equilibrium equations and geometric equations are: The constitutive equation is: Here, r represents the radial distance. This term primarily arises when discussing stress distribution in cylindrical coordinates, particularly when analyzing stress in thick-walled cylinders. It refers to the distance from the center of the cylinder or annulus to a specified point and is a positional variable. When calculating stress in a thick-walled cylinder (for example, at (r = b0) or (r = b0 + h)), the radial distance r is a crucial factor in determining stress magnitude, as stress at different locations on the cylinder will vary with r. Here, v represents the Poisson's ratio, a constant in material mechanics that describes the ratio of the transverse to longitudinal deformation of a material when subjected to tension or compression along a particular direction. Specifically, the Poisson's ratio is the ratio of the absolute values of the transverse strain (perpendicular to the direction of the applied force) to the longitudinal strain (along the direction of the applied force), and is typically represented by the symbol (\nu). In elastic materials, the Poisson's ratio reflects the material's resistance to transverse deformation. For engineering materials such as cable accessories and cable systems, the Poisson's ratio is a key property in determining their stress-strain behavior.

[0092] Poisson's ratio v and elastic modulus E are used together in the constitutive equation of the material to describe the relationship between stress and strain of the material when subjected to external force. The constitutive equation mentioned in the embodiment of the present invention uses Poisson's ratio and elastic modulus to express the mathematical relationship between radial stress (\sigma_r), tangential stress (\sigma_\theta) and radial strain (\varepsilon_r), tangential strain (\varepsilon_\theta) in elastic materials. The correct selection and application of these parameters are crucial for accurately calculating the conversion of interface pressure between cable accessories and cable body, and are also one of the key links in the methodology of the present invention.

[0093] In summary, r and v are the radial position variable describing the stress distribution of the cylindrical structure and the Poisson's ratio characterizing the lateral deformation characteristics of the material, respectively. They play an important role in the cable accessory interface pressure measurement method proposed in the embodiment of the present invention, ensuring the accuracy of the measurement and the validity of the theoretical model. Comparing Figure 4(a) and Figure 4(b), it is easy to see that the internal force of the sleeve 405 is the interface pressure between the cable accessory and the cable body (i.e., the first interface pressure), denoted as p; and the measurement system is not constrained by external forces, so the external force of the sleeve 405 is 0. Therefore, the boundary conditions of the plane strain problem are obtained as follows: Where a0 and b0 represent the inner and outer radii of the cable accessory 402 in its natural state when not installed, and h represents the thickness of the sleeve 401. The radial stress received by the infinitesimal element at the radial coordinate r before expansion is obtained by the above formula: The fifth formula can be used to calculate the interface pressure between the cable accessory and the cable body by measuring the interface pressure on the cross section at radial coordinate r. In the fifth formula, r = b0, which is the radial stress at the outer radius of the cable accessory. This can be measured using a thin film pressure sensor and then calculated to obtain the interface pressure between the cable accessory and the cable body.

[0094] According to the above embodiment of the present invention, determining the first interface pressure according to the second interface pressure may include: equating the second interface pressure to the first interface pressure.

[0095] In this embodiment, the second interface pressure can be equivalent to the first interface pressure.

[0096] Since the measuring sleeve and the thin film pressure sensor are installed outside the cable accessory, this method does not damage the insulation structure between the cable accessory and the body, and can be used for online measurement.

[0097] Furthermore, in the embodiments of the present invention, appropriate outer sleeve dimensions must be selected for different cable accessories and cable cross-sections. Finite element analysis and theoretical calculations are combined to calculate the interface pressures on the inner and outer surfaces of the cable accessory after sleeves of varying thicknesses are installed. This ensures that the introduction of the sleeve minimizes the impact of the interface pressure between the cable accessory and the cable body, while also ensuring that the interface pressure between the cable accessory and the outer sleeve falls within the range of one-third to one-half the measuring range of the thin-film pressure sensor.

[0098] Figure 7 Schematic diagram of a double-layer sleeve-based measurement system according to an embodiment of the present invention. Figure 7 As shown in the figure, the measurement system is built using the above equipment and pre-selected and cut cable accessories. Figure 7 As shown. In the figure, 701 is a thin film pressure sensor with a suitable range (ie, Figure 3303), which is fixed to the outer sleeve 702 (ie, Figure 3 302) and cable accessories 703 (ie, Figure 3 301) between the cut segments to make the interface fit tightly, the cable accessory cut segment is installed in the cable body 704 (ie, Figure 3 The whole is placed in a constant temperature box 707, and the signal line of the thin film pressure sensor is led out through the measuring port on the side wall of the box, connected to the thin film pressure acquisition system 705, and the final pressure measurement result is output to the measurement computer 706. (As shown Figure 7 As shown, there is a measuring hole on the side wall of the thermostat. Place the entire cable accessory into it and fix the film pressure sensor at the position to be measured. Then lead the signal line on the film pressure sensor out of the measuring hole and connect it to the Figure 7 In the thin film pressure measuring instrument shown in 705, the instrument is connected to the computer via USB. During this process, the transmission time of the signal line is in milliseconds, which can ensure the real-time nature of the measurement data).

[0099] use Figure 7 The measurement system (i.e., the cable accessory interface pressure determination system in an embodiment of the present invention) was used to perform measurements. Segments of cable accessories were fitted onto cables with outer diameters of 30.31 mm and 35.66 mm, respectively. The reading from the thin film pressure sensor was then applied to the formula described above to calculate the interface pressure between the cable accessory and the cable body. The results were compared with the theoretically calculated values, as shown in Table 1 (Table 1 shows the measurement results of the measurement system). As can be seen from Table 6, the error between the interface pressure values measured using this method and the theoretically calculated values is less than 4%. Furthermore, after the outer sleeve was introduced for measurement, the interface pressure between the cable accessory and the cable body increased slightly, but the increase was small and did not exceed the reliable range.

[0100] Table 1

[0101]

[0102]

[0103] Through the technical solution provided by the above embodiment of the present invention, a non-invasive layout of the outer sleeve and the sensor is adopted to avoid damaging the original insulation interface of the cable accessories, and at the same time, the geometric parameter amplification effect in the above formula is used to achieve lossless conversion of the interface pressure. It has the following beneficial effects: 1) It can realize non-destructive online measurement of the interface pressure between the cable accessories and the body: In response to the engineering monitoring needs of the dynamic changes in the interface pressure during the operation of the cable system, an external measurement method that does not destroy the original insulation interface structure is established to achieve lossless transmission and collection of interface pressure information. 2) It improves the measurement accuracy of the interface pressure under complex working conditions: It solves the measurement error problem caused by the deviation of material parameters and the idealization of boundary conditions in the traditional finite element simulation method, and combines the thick-walled cylinder theoretical model with the finite element parameter optimization to control the measurement error within 4%. 3) It realizes real-time monitoring of dynamic pressure fluctuations: It breaks through the limitations of static measurement in the laboratory and constructs an integrated constant temperature control ( Figure 7 707) and a multi-physics field coupling measurement system for mechanical loading (704 cable body simulation) to capture the transient response of pressure when the load fluctuates (the specific response time is related to the response time of the thin film pressure sensor used).

[0104] Therefore, the above technical solution provided by the embodiment of the present invention is aimed at the engineering monitoring needs of the dynamic changes of interface pressure during the operation of the cable system, and an external measurement method that does not destroy the original insulation interface structure is established. The entire measurement system is located on the outer layer of the cable accessory insulation structure, realizing the lossless transmission and collection of interface pressure information. In order to solve the measurement error problem caused by material parameter deviation and idealized boundary conditions in the traditional finite element simulation method, a thin film pressure sensor is installed on the actual cable accessory system for real-time measurement to obtain results that are more in line with the actual situation. In view of the limitations of static measurements in the laboratory, the measurement system can be installed on the outside of the cable accessory in actual operation for measurement, so that the results are more in line with the actual situation.

[0105] It should be noted that for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0106] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus the necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0107] Example 2

[0108] According to an embodiment of the present invention, there is also provided a device for determining the cable accessory interface pressure for implementing the above-mentioned method for determining the cable accessory interface pressure. Figure 8 Schematic diagram of a device for determining the interface pressure of a cable accessory according to an embodiment of the present invention. Figure 8 As shown, the device for determining the interface pressure of cable accessories includes: a first acquiring unit 801, a first determining unit 803, a processing unit 805, a second acquiring unit 807, and a second determining unit 809. The device for determining the interface pressure of cable accessories is described below.

[0109] The first acquisition unit 801 is used to obtain the accessory parameters of the cable accessory before assembly, wherein the cable accessory is an accessory that needs to be assembled on the target cable, the target cable is a cable that needs to undergo a first interface pressure test, the first interface pressure is the interface pressure between the cable accessory and the target cable, and the accessory parameters are the size parameters of the cable accessory.

[0110] The first determining unit 803 is configured to determine attribute information of the outer sleeve according to the accessory parameters, wherein the outer sleeve is used to fix a pressure sensor, and the pressure sensor is used to measure a second interface pressure between the cable accessory and the outer sleeve.

[0111] The processing unit 805 is configured to install the cable accessory on the target cable after determining that the pressure sensor is fixed between the cable accessory and the outer sleeve.

[0112] The second acquiring unit 807 is configured to trigger the pressure sensor to start after determining that the cable accessory is installed on the target cable, so as to acquire the second interface pressure.

[0113] The second determining unit 809 is configured to determine the first interface pressure according to the second interface pressure.

[0114] It should be noted here that the above-mentioned first acquisition unit 801, first determination unit 803, processing unit 805, second acquisition unit 807 and second determination unit 809 correspond to steps S202 to S210 in the above-mentioned embodiment. The five units have the same instances and application scenarios implemented by the corresponding steps, but are not limited to the contents disclosed in the above-mentioned embodiment.

[0115] As can be seen from the above, in the scheme described in the above embodiment of the present invention, the first acquisition unit can be used to acquire the accessory parameters of the cable accessory before assembly, wherein the cable accessory is an accessory that needs to be assembled on a target cable, the target cable is a cable that needs to undergo a first interface pressure detection, the first interface pressure is the interface pressure between the cable accessory and the target cable, and the accessory parameters are the dimensional parameters of the cable accessory; then, the first determination unit is used to determine the attribute information of the outer sleeve based on the accessory parameters, wherein the outer sleeve is used to fix a pressure sensor, and the pressure sensor is used to measure a second interface pressure between the cable accessory and the outer sleeve; then, after determining that the pressure sensor is fixed between the cable accessory and the outer sleeve, the cable accessory is installed on the target cable; and after determining that the cable accessory is installed on the target cable, the second acquisition unit is used to trigger the pressure sensor to start to obtain the second interface pressure; and finally, the second determination unit is used to determine the first interface pressure based on the second interface pressure. This achieves a non-invasive layout of the outer sleeve and the pressure sensor, and uses the interface pressure between the outer sleeve and the cable accessory acquired by the pressure sensor between the outer sleeve and the cable accessory to determine the interface pressure between the cable accessory and the cable body, thereby achieving the effect of lossless transmission and acquisition of interface pressure information.

[0116] Therefore, the above technical solution provided by the embodiment of the present invention solves the technical problem in the related art that it is impossible to achieve non-destructive online measurement of the interface pressure between the cable accessory and the body without destroying the original insulation structure.

[0117] Optionally, the first acquisition unit includes: a first acquisition module, configured to measure a first inner radius value and a first outer radius value of the cable accessory before assembly by a length measurement component upon receiving an interface pressure measurement request, so as to obtain accessory parameters.

[0118] Optionally, the first determination unit includes: a first determination module, used to determine the second inner radius value of the outer sleeve according to the first outer radius value of the cable accessory in the accessory parameters; a second determination module, used to determine the second outer radius value of the outer sleeve according to the thickness of the outer sleeve and the second inner radius value; a third determination module, used to determine the material properties of the outer sleeve according to the material properties of the cable accessory.

[0119] Optionally, the device for determining the interface pressure of the cable accessory also includes: a second acquisition module, used to obtain the initial interface pressure of the cable accessory and the thickness range of the outer sleeve before determining the second outer radius value of the outer sleeve based on the thickness of the outer sleeve and the second inner radius value; and a fourth determination module, used to determine the thickness based on the initial interface pressure and the thickness range.

[0120] Optionally, the second acquisition module includes: a first determination submodule, used to determine the material model according to the material properties of the cable accessories, wherein the material model is used to simulate the outer sleeve; a simulation submodule, used to simulate the outer sleeve according to the material model using a finite element simulation method to obtain a thickness range.

[0121] Optionally, the device for determining the interface pressure of the cable accessory also includes: a third determination unit, used to trigger the pressure sensor to start after determining that the cable accessory is installed on the target cable, so as to determine the estimated interface pressure between the outer sleeve and the cable accessory before obtaining the second interface pressure; and a selection unit, used to select the pressure sensor according to the estimated interface pressure.

[0122] Optionally, the attachment parameters satisfy the first formula: Where a0 represents the first inner radius value of the cable accessory before assembly, b0 represents the first outer radius value of the cable accessory before assembly, h represents the thickness of the outer sleeve, p represents the first interface pressure, σ r Represents the radial stress of the cable accessory at the radial coordinate r.

[0123] Optionally, the second determining unit includes: an equivalent module, configured to equate the second interface pressure to the first interface pressure.

[0124] According to another aspect of an embodiment of the present invention, a cable accessory interface pressure determination system is provided. The cable accessory interface pressure determination system uses any of the above methods for determining the cable accessory interface pressure.

[0125] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored program, wherein the program executes any one of the above methods for determining the cable accessory interface pressure.

[0126] Optionally, in this embodiment, the computer-readable storage medium may be located in any one of the computer terminals in a computer terminal group in a computer network, or in any one of the communication devices in a communication device group.

[0127] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: obtaining accessory parameters of the cable accessory before assembly, wherein the cable accessory is an accessory that needs to be assembled on the target cable, the target cable is a cable that needs to undergo a first interface pressure test, the first interface pressure is the interface pressure between the cable accessory and the target cable, and the accessory parameters are size parameters of the cable accessory; determining attribute information of the outer sleeve based on the accessory parameters, wherein the outer sleeve is used to fix a pressure sensor, and the pressure sensor is used to measure the second interface pressure between the cable accessory and the outer sleeve; after determining that the pressure sensor is fixed between the cable accessory and the outer sleeve, installing the cable accessory on the target cable; after determining that the cable accessory is installed on the target cable, triggering the pressure sensor to start to obtain the second interface pressure; determining the first interface pressure based on the second interface pressure.

[0128] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: upon receiving an interface pressure measurement request, measuring a first inner radius value and a first outer radius value of the cable accessory before assembly by a length measuring component to obtain accessory parameters.

[0129] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: determining the second inner radius value of the outer sleeve based on the first outer radius value of the cable accessory in the accessory parameters; determining the second outer radius value of the outer sleeve based on the thickness of the outer sleeve and the second inner radius value; determining the material properties of the outer sleeve based on the material properties of the cable accessory.

[0130] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: before determining the second outer radius value of the outer sleeve based on the thickness of the outer sleeve and the second inner radius value, obtaining the initial interface pressure of the cable accessory and the thickness range of the outer sleeve; determining the thickness based on the initial interface pressure and the thickness range.

[0131] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: determining a material model based on the material properties of the cable accessories, wherein the material model is used to simulate the outer sleeve; simulating the outer sleeve using a finite element simulation method based on the material model to obtain a thickness range.

[0132] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: after determining that the cable accessory is installed on the target cable, triggering the pressure sensor to start to obtain the second interface pressure, determining an estimated value of the interface pressure between the outer sleeve and the cable accessory; and selecting a pressure sensor based on the estimated value of the interface pressure.

[0133] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: equating the second interface pressure to the first interface pressure.

[0134] According to another aspect of an embodiment of the present invention, a processor is further provided, and the processor is used to run a program, wherein when the program is run, any one of the above-mentioned methods for determining the cable accessory interface pressure is executed.

[0135] According to another aspect of an embodiment of the present invention, a computer program product is provided, comprising computer instructions, which, when executed by a processor, execute any one of the above methods for determining the cable accessory interface pressure.

[0136] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0137] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0138] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0139] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0140] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0141] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc. Various media that can store program codes.

[0142] The above is only 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 should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for determining the interface pressure of a cable accessory, characterized in that: include: Obtaining accessory parameters of a cable accessory before assembly, wherein the cable accessory is an accessory that needs to be assembled on a target cable, the target cable is a cable that needs to undergo a first interface pressure test, the first interface pressure is the interface pressure between the cable accessory and the target cable, and the accessory parameters are dimensional parameters of the cable accessory; Determining attribute information of an outer sleeve according to the accessory parameters, wherein the outer sleeve is used to fix a pressure sensor, and the pressure sensor is used to measure a second interface pressure between the cable accessory and the outer sleeve; After ensuring that the pressure sensor is fixed between the cable accessory and the outer sleeve, installing the cable accessory on the target cable; After determining that the cable accessory is installed on the target cable, triggering the pressure sensor to start to obtain the second interface pressure; The first interface pressure is determined according to the second interface pressure.

2. The method for determining the interface pressure of cable accessories according to claim 1, characterized in that: Get the parameters of the cable accessories before assembly, including: When an interface pressure measurement request is received, a first inner radius value and a first outer radius value of the cable accessory before assembly are measured by a length measuring component to obtain the accessory parameters.

3. The method for determining the interface pressure of cable accessories according to claim 1, characterized in that: Determining the attribute information of the outer sleeve according to the accessory parameters includes: Determine a second inner radius value of the outer sleeve according to a first outer radius value of the cable accessory in the accessory parameter; Determining a second outer radius value of the outer sleeve according to the thickness of the outer sleeve and the second inner radius value; The material properties of the outer sleeve are determined according to the material properties of the cable accessories.

4. The method for determining the interface pressure of cable accessories according to claim 3, characterized in that: Before determining the second outer radius value of the outer sleeve according to the thickness of the outer sleeve and the second inner radius value, the method further includes: Obtaining an initial interface pressure of the cable accessory and a thickness range of the outer sleeve; The thickness is determined according to the initial interface pressure and the thickness range.

5. The method for determining the interface pressure of cable accessories according to claim 4, characterized in that: Obtaining the thickness range of the outer sleeve includes: Determining a material model according to the material properties of the cable accessory, wherein the material model is used to simulate the outer sleeve; The outer sleeve is simulated using a finite element simulation method according to the material model to obtain the thickness range.

6. The method for determining the interface pressure of a cable accessory according to claim 1, characterized in that: After determining that the cable accessory is installed on the target cable, and before triggering the pressure sensor to start to obtain the second interface pressure, the method further includes: determining an estimated interface pressure between the outer sleeve and the cable accessory; The pressure sensor is selected according to the estimated interface pressure.

7. The method for determining the interface pressure of a cable accessory according to claim 1, characterized in that: The attachment parameters satisfy the first formula: Wherein, a0 represents the first inner radius value of the cable accessory before assembly, b0 represents the first outer radius value of the cable accessory before assembly, h represents the thickness of the outer sleeve, p represents the first interface pressure, σ r represents the radial stress of the cable accessory at the radial coordinate r.

8. The method for determining the interface pressure of a cable accessory according to claim 1, characterized in that: Determining the first interface pressure according to the second interface pressure includes: The second interface pressure is equivalent to the first interface pressure.

9. A device for determining the interface pressure of a cable accessory, characterized in that: include: a first acquiring unit, configured to acquire accessory parameters of a cable accessory before assembly, wherein the cable accessory is an accessory to be assembled onto a target cable, the target cable is a cable to be subjected to a first interface pressure test, the first interface pressure is the interface pressure between the cable accessory and the target cable, and the accessory parameters are dimensional parameters of the cable accessory; a first determining unit, configured to determine attribute information of an outer sleeve according to the accessory parameter, wherein the outer sleeve is used to fix a pressure sensor, and the pressure sensor is used to measure a second interface pressure between the cable accessory and the outer sleeve; a processing unit, configured to install the cable accessory on the target cable after determining that the pressure sensor is fixed between the cable accessory and the outer sleeve; a second acquiring unit, configured to trigger the pressure sensor to start after determining that the cable accessory is installed on the target cable, so as to acquire the second interface pressure; The second determining unit is configured to determine the first interface pressure according to the second interface pressure.

10. A computer program product comprising computer instructions, characterized in that When the computer instructions are executed by a processor, the method for determining the cable accessory interface pressure according to any one of claims 1 to 8 is performed.

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