Cable core wire coating method and system

Abstract

The present invention belongs to the field of computer-aided design, and proposes a cable core wrapping method and system, which includes the following steps: obtaining a three-dimensional model of the cable core; meshing the three-dimensional model of the cable core; identifying the core area and the wrapping layer area of ​​the cable core finite element model; performing finite element stress analysis on the core area and the wrapping layer finite element area according to the obtained core area and wrapping layer finite element area; obtaining the stress buckling stress of the stress concentration area of ​​the wrapping layer finite element area; color marking the stress buckling area of ​​the three-dimensional model of the cable core to obtain a new three-dimensional model of the cable core. According to the wrapping method of the embodiment of the present invention, it is possible to detect and analyze the stress concentration and stress buckling of the wrapping layer of the cable core under stress conditions, and find the buckling area.

Description

Technical Field

[0001] The invention belongs to the field of computer-aided design, and in particular relates to a cable core wire coating method and system. Background Art

[0002] At present, traditional cables are prone to stress concentration at connectors, bending areas or places where stress is concentrated. When stress concentration occurs at the bending radius or fixed point, the cable will cause the sheath to break or buckle, affecting the structural integrity of the internal core wire and causing the internal core wire to be exposed or damaged, causing the cable to fail. In addition, the presence of stress concentration areas increases the risk of sudden failure of the cable at these locations, especially in scenarios with dynamic loads or frequent environmental changes, where this problem may be more significant because the cable may not be able to effectively cope with changing working conditions.

[0003] However, another limitation of traditional cable design is the lack of precise analysis and optimization of complex dynamic loads and environmental changes. The design is usually based on empirical rules or standards under static load conditions. This approach cannot fully take into account the variability and complexity of actual working conditions. Therefore, in actual applications, the cable may not fully exert its design strength and performance, resulting in limited reliability and durability. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first purpose of the present invention is to propose a cable core coating method, which can detect and analyze the stress concentration and stress buckling of the coating layer of the cable core under stress conditions, find the buckling area, perform preventive maintenance and improve the design, and avoid the damage or buckling of the coating layer affecting the structural integrity of the internal core and causing the internal core to be exposed or damaged, affecting the electrical performance of the cable core;

[0005] The second object of the present invention is to provide a cable core covering system.

[0006] To achieve the above object, a first embodiment of the present invention provides a cable core wire coating method, the method comprising the following steps:

[0007] S100, obtaining a three-dimensional model of the cable core wire; loading the three-dimensional model of the cable core wire into finite element analysis software, meshing the three-dimensional model of the cable core wire using a meshing algorithm, and obtaining a finite element model of the cable core wire;

[0008] S200, identifying a core wire region and a sheath layer region of a cable core wire finite element model, and obtaining a core wire finite element region and a sheath layer finite element region of the cable core wire finite element model;

[0009] S300, performing finite element stress analysis on the core wire finite element region and the wrapping layer finite element region according to the obtained core wire finite element region and the wrapping layer finite element region, and obtaining a stress concentration region in the wrapping layer finite element region;

[0010] S400, obtaining the stress buckling stress of the stress concentration area in the finite element area of ​​the package layer, and obtaining the stress buckling area through the stress buckling stress;

[0011] S500: Mark the stress buckling area of ​​the three-dimensional model of the cable core wire with a color to obtain a new three-dimensional model of the cable core wire.

[0012] According to the wrapping method of an embodiment of the present invention, it is possible to detect and analyze the stress concentration and stress buckling of the wrapping layer of the cable core wire under stress conditions, identify the buckling area, perform preventive maintenance and improve the design, and avoid damage or buckling of the wrapping layer that affects the structural integrity of the internal core wire and causes the internal core wire to be exposed or damaged, thereby affecting the electrical performance of the cable core wire.

[0013] Further, in step S100, a three-dimensional model of the cable core of the subject is obtained by a three-dimensional scanner; the three-dimensional model of the cable core is loaded into the finite element analysis software, and the three-dimensional model of the cable core is meshed by a meshing algorithm to obtain a finite element model of the cable core. The method is specifically as follows: the three-dimensional model of the cable core is imported into the modeling software, the first boundary condition is set as the minimum quadrilateral internal angle is greater than G1 degrees and the maximum quadrilateral internal angle is less than G2 degrees, the second boundary condition is set as the minimum triangle internal angle is greater than G3 degrees and the minimum triangle internal angle is less than G4 degrees, the first boundary condition and the second boundary condition are used as model constraints, and the free meshing algorithm is used to complete the division to obtain the finite element model of the cable core; wherein G1 is set to [30, 40] degrees, G2 is set to [130, 140] degrees, G3 is set to [10, 20] degrees, and G4 is set to [140, 150] degrees, and G1, G2, G3, and G4 are angles.

[0014] Cables in industrial environments are often subject to mechanical stress and vibration, such as the cables on a robot arm that are constantly bent and twisted with mechanical movement. When stress concentration occurs at the bending radius or fixed point, the cable will cause the sheath to break or buckle, affecting the structural integrity of the internal core wire and causing the internal core wire to be exposed or damaged, causing cable failure. In order to solve this problem, it is necessary to find the parts of the sheath that are prone to buckling in advance and add additional elastic materials.

[0015] Further, in step S200, the core wire region and the sheath layer region of the cable core wire finite element model are identified, and the cable core wire finite element model and the sheath layer finite element model are obtained, including: obtaining the core wire finite element region and the sheath layer finite element region of the cable core wire finite element model by feature extraction or ROI (region of interest) division;

[0016] Furthermore, in step S300, according to the obtained core wire finite element region and wrapping layer finite element region, finite element stress analysis is performed on the core wire finite element model and the wrapping layer finite element model, and the method for obtaining the stress concentration region of the wrapping layer finite element model includes:

[0017] The core wire finite element region and the wrapping layer finite element region are imported into the finite element analysis software, and the stress magnitude of each grid in the core wire finite element region and the wrapping layer finite element region is obtained through stress analysis in the finite element analysis software. The stress magnitude of the i-th grid in the core wire finite element region is denoted as D(i), i=1,2,…,M, and M is the number of all grids in the core wire finite element region. The first stress sequence composed of D(1), D(2),…, D(M) is denoted as Stress1, the element with the largest value in the first stress sequence is denoted as DT1, and the average value of all values ​​in the first stress sequence is denoted as DT2; the stress magnitude of the i-th grid in the wrapping layer finite element region is denoted as B(j), j=1,2,…,H, and H is the number of all grids in the wrapping layer finite element region. The second stress sequence composed of B(1), B(2),…, B(H) is denoted as Stress2, the element with the largest value in the second stress sequence is denoted as BT1, and the average value of all values ​​in the second stress sequence is denoted as BT2;

[0018] Calculate the average value of DT2 and DT1 and record it as DTK; calculate the average value of BT1 and BT2 and record it as BTK; record the stress values ​​in the range of [DTK, DT1] in the first stress sequence as the first abnormal stress range, and record the stress values ​​in the range of [BTK, BT1] in the second stress sequence as the second abnormal stress range.

[0019] The grids whose stress values ​​in the core finite element area are in the first abnormal stress range are recorded as the first stress abnormal grids, and the grids whose stress values ​​in the sheath finite element area are in the second abnormal stress range are recorded as the second stress abnormal grids; the first stress abnormal grids refer to the grid areas affected by higher stress in the finite element model of the cable core, and these grids show higher local stress values ​​than the surrounding grids in the finite element stress analysis. The first stress abnormal grids can help identify the specific areas affected by stress concentration in the cable, and are used to locate possible structural weaknesses or stress concentration problems; the second stress abnormal grids more specifically point to the grid areas affected by stress buckling in the finite element model of the sheath or other external covering layers, and these grids show stress concentration or abnormal characteristics. Compared with the first stress abnormal grids, the second stress abnormal grids pay more attention to the response of the external sheath under stress conditions. By identifying the second stress abnormal grids, it can help determine the possible buckling or structural problems of the external sheath, and then take appropriate reinforcement or optimization measures to improve the durability and safety of the cable.

[0020] Obtain the stress distance between each second stress anomaly grid and the first stress anomaly grid,

[0021] The stress distance between each second stress anomaly grid and the first stress anomaly grid is the length of the shortest line segment among the line segments between the grid center of the second stress anomaly grid and the grid center of all first stress anomaly grids. X(p) represents the distance between the pth second stress anomaly grid and the first stress anomaly grid, BK(p) represents the stress magnitude of the pth second stress anomaly grid, where p∈[1,n], and n is the number of second stress anomaly grids; the average value of all X(p) is XK, all second stress anomaly grids with stress distances lower than XK are recorded as stress concentration grids, and the area composed of all stress concentration grids is recorded as stress concentration area.

[0022] The beneficial effect of this step is: the stress distance of the shortest path distance between each second stress anomaly grid and the nearest first stress anomaly grid measures the degree of proximity between the spatial positions of stress anomaly grids in two different areas. The stress distance can help determine the specific location of stress concentration inside the cable structure, and further analyze the possible stress concentration degree in these areas and its impact on the structural strength.

[0023] S400, obtaining the stress buckling stress of the stress concentration area in the finite element area of ​​the package layer, and obtaining the stress buckling area through the stress buckling stress;

[0024] The method for obtaining the stress buckling stress includes: adding the maximum stress range difference through BT2; wherein the maximum stress range difference is the product of BT2 and the stress ratio, wherein the stress ratio is and ratio.

[0025] Among them, the stress-distance ratio refers to the proportional relationship between the average value of the local stress value of each grid in the structure and the distance of each grid to the overall average stress distance and the starting stress of the abnormal stress range. In finite element analysis, the stress-distance ratio can reveal the stress distribution characteristics of different areas in the structure. The high or low stress-distance ratio reflects the uniformity of the internal stress of the structure and a derivative abnormal stress difference of possible stress concentration.

[0026] The maximum stress range difference describes the derived abnormal stress difference between the local stress value and the average stress in the stress concentration area. The maximum stress range difference can quantitatively show the stage stress of the unevenness of stress distribution and its potential impact on the strength and safety of the structure, so as to take appropriate strengthening or optimization measures to ensure the stability and reliability of the structure when it is subjected to mechanical loads.

[0027] The stress concentration meshes in the stress concentration area with stress values ​​greater than the buckling stress are recorded as stress buckling meshes, and the area composed of all stress buckling meshes is recorded as stress buckling area;

[0028] The beneficial effect of this step is that the stress distribution characteristics of different areas in the structure can be accurately reflected through the stress distance ratio. By comparing the local stress value of each grid with the sum of the average stress distances of the surrounding grids and the overall average stress distance, possible stress concentration areas and abnormal stress differences can be clearly identified. Different stress distance ratios reflect the uniformity of stress inside the structure. When the stress distance ratio is high, it means that the stress distribution in each area of ​​the structure is relatively uniform, and the stability and reliability of the structure are relatively high; while a low stress distance ratio indicates stress concentration, which requires further structural adjustment or reinforcement measures.

[0029] S500: Mark the stress buckling area of ​​the three-dimensional model of the cable core wire with a color to obtain a new three-dimensional model of the cable core wire.

[0030] The 3D model of the cable core is color-coded, with stress concentration areas marked in yellow, stress buckling areas marked in red, and the remaining areas marked in green; the remaining areas are the areas composed of all meshes in the 3D model of the cable core that do not belong to the stress concentration area and stress buckling area. This color coding helps to intuitively display the stress distribution and quickly identify potential structural problem areas.

[0031] The 3D model with the marked stress buckling area is saved as a new 3D model file. This new 3D model not only contains the original geometry and structure information, but also includes the stress analysis result information, which is visualized in color.

[0032] Furthermore, the stress concentration area and stress buckling area of ​​the cable core wire wrapping layer analyzed by finite element analysis are subjected to elastic material processing, wherein the specific steps of the processing include:

[0033] Silicone rubber is selected to cover the stress concentration area and stress buckling area of ​​the cable core sheath through an extruder or coating equipment, wherein the amount of silicone rubber or propylene rubber coated on the stress buckling area is 2-4 times that of the stress concentration area. After extrusion or coating, the silicone rubber is fully cooled and cured to ensure its stability and durability, wherein the cooling method includes air cooling.

[0034] According to the method of the present invention, it is possible to detect and analyze the stress concentration and stress buckling of the sheath of the cable core under stress conditions, find the buckling area, perform preventive maintenance and improve the design, and avoid damage or buckling of the sheath that affects the structural integrity of the internal core and causes the internal core to be exposed or damaged, affecting the electrical performance of the cable core.

[0035] To achieve the above-mentioned purpose, the second aspect of the embodiment of the present invention further proposes a cable core covering system, which includes: a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps in a cable core covering method when executing the computer program, and the cable core covering system runs on a desktop computer, a notebook, a PDA, and a computing device in a cloud data center.

[0036] By implementing the cable core coating method through the cable core coating system, it is possible to detect and analyze the stress concentration and stress buckling of the cable core coating layer under stress conditions, find the buckling area, perform preventive maintenance and improve the design, and avoid damage or buckling of the coating layer that affects the structural integrity of the internal core wire and causes the internal core wire to be exposed or damaged, affecting the electrical performance of the cable core wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Shown is a flow chart of a cable core wire coating method;

[0038] Figure 2 Shown is the structural diagram of the cable core covering system. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0040] Figure 1Shown is a flow chart of a cable core covering method.

[0041] Reference Figure 1 The present invention provides a cable core wire coating method, the method comprising the following steps:

[0042] S100, obtaining a three-dimensional model of the cable core wire; loading the three-dimensional model of the cable core wire into finite element analysis software, meshing the three-dimensional model of the cable core wire using a meshing algorithm, and obtaining a finite element model of the cable core wire;

[0043] S200, identifying a core wire region and a sheath layer region of a cable core wire finite element model, and obtaining a core wire finite element region and a sheath layer finite element region of the cable core wire finite element model;

[0044] S300, performing finite element stress analysis on the core wire finite element region and the wrapping layer finite element region according to the obtained core wire finite element region and the wrapping layer finite element region, and obtaining a stress concentration region in the wrapping layer finite element region;

[0045] S400, obtaining the stress buckling stress of the stress concentration area in the finite element area of ​​the package layer, and obtaining the stress buckling area through the stress buckling stress;

[0046] S500: Mark the stress buckling area of ​​the three-dimensional model of the cable core wire with a color to obtain a new three-dimensional model of the cable core wire.

[0047] According to the wrapping method of an embodiment of the present invention, it is possible to detect and analyze the stress concentration and stress buckling of the wrapping layer of the cable core wire under stress conditions, identify the buckling area, perform preventive maintenance and improve the design, and avoid damage or buckling of the wrapping layer that affects the structural integrity of the internal core wire and causes the internal core wire to be exposed or damaged, thereby affecting the electrical performance of the cable core wire.

[0048] Further, in step S100, a three-dimensional model of the cable core of the subject is obtained by a three-dimensional scanner; the three-dimensional model of the cable core is loaded into the finite element analysis software, and the three-dimensional model of the cable core is meshed by a meshing algorithm to obtain a finite element model of the cable core. The method is specifically as follows: the three-dimensional model of the cable core is imported into the modeling software, the first boundary condition is set as the minimum quadrilateral internal angle is greater than G1 degrees and the maximum quadrilateral internal angle is less than G2 degrees, the second boundary condition is set as the minimum triangle internal angle is greater than G3 degrees and the minimum triangle internal angle is less than G4 degrees, the first boundary condition and the second boundary condition are used as model constraints, and the free meshing algorithm is used to complete the division to obtain the finite element model of the cable core; wherein G1 is set to [30, 40] degrees, G2 is set to [130, 140] degrees, G3 is set to [10, 20] degrees, and G4 is set to [140, 150] degrees, and G1, G2, G3, and G4 are angles.

[0049] Cables in industrial environments are often subject to mechanical stress and vibration, such as the cables on a robot arm that are constantly bent and twisted with mechanical movement. When stress concentration occurs at the bending radius or fixed point, the cable will cause the sheath to break or buckle, affecting the structural integrity of the internal core wire and causing the internal core wire to be exposed or damaged, causing cable failure. In order to solve this problem, it is necessary to find the parts of the sheath that are prone to buckling in advance and add additional elastic materials.

[0050] Further, in step S200, the core wire region and the wrapping layer region of the cable core wire finite element model are identified, and the cable core wire finite element model and the wrapping layer finite element model are obtained, including: obtaining the core wire finite element region and the wrapping layer finite element region of the cable core wire finite element model by ROI (region of interest) division;

[0051] Furthermore, in step S300, according to the obtained core wire finite element region and wrapping layer finite element region, finite element stress analysis is performed on the core wire finite element model and the wrapping layer finite element model, and the method for obtaining the stress concentration region of the wrapping layer finite element model includes:

[0052] The core wire finite element region and the wrapping layer finite element region are imported into the finite element analysis software, and the stress magnitude of each grid in the core wire finite element region and the wrapping layer finite element region is obtained through stress analysis in the finite element analysis software. The stress magnitude of the i-th grid in the core wire finite element region is denoted as D(i), i=1,2,…,M, and M is the number of all grids in the core wire finite element region. The first stress sequence composed of D(1), D(2),…, D(M) is denoted as Stress1, the element with the largest value in the first stress sequence is denoted as DT1, and the average value of all values ​​in the first stress sequence is denoted as DT2; the stress magnitude of the i-th grid in the wrapping layer finite element region is denoted as B(j), j=1,2,…,H, and H is the number of all grids in the wrapping layer finite element region. The second stress sequence composed of B(1), B(2),…, B(H) is denoted as Stress2, the element with the largest value in the second stress sequence is denoted as BT1, and the average value of all values ​​in the second stress sequence is denoted as BT2;

[0053] Calculate the average value of DT2 and DT1 and record it as DTK; calculate the average value of BT1 and BT2 and record it as BTK; record the stress values ​​in the range of [DTK, DT1] in the first stress sequence as the first abnormal stress range, and record the stress values ​​in the range of [BTK, BT1] in the second stress sequence as the second abnormal stress range.

[0054] The grids whose stress values ​​in the core finite element area are in the first abnormal stress range are recorded as the first stress abnormal grids, and the grids whose stress values ​​in the sheath finite element area are in the second abnormal stress range are recorded as the second stress abnormal grids; the first stress abnormal grids refer to the grid areas affected by higher stress in the finite element model of the cable core, and these grids show higher local stress values ​​than the surrounding grids in the finite element stress analysis. The first stress abnormal grids can help identify the specific areas affected by stress concentration in the cable, and are used to locate possible structural weaknesses or stress concentration problems; the second stress abnormal grids more specifically point to the grid areas affected by stress buckling in the finite element model of the sheath or other external covering layers, and these grids show stress concentration or abnormal characteristics. Compared with the first stress abnormal grids, the second stress abnormal grids pay more attention to the response of the external sheath under stress conditions. By identifying the second stress abnormal grids, it can help determine the possible buckling or structural problems of the external sheath, and then take appropriate reinforcement or optimization measures to improve the durability and safety of the cable.

[0055] Obtain the stress distance between each second stress anomaly grid and the first stress anomaly grid,

[0056] The stress distance between each second stress anomaly grid and the first stress anomaly grid is the length of the shortest line segment among the line segments between the grid center of the second stress anomaly grid and the grid center of all first stress anomaly grids. X(p) represents the distance between the pth second stress anomaly grid and the first stress anomaly grid, BK(p) represents the stress magnitude of the pth second stress anomaly grid, where p∈[1,n], and n is the number of second stress anomaly grids; the average value of all X(p) is XK, all second stress anomaly grids with stress distances lower than XK are recorded as stress concentration grids, and the area composed of all stress concentration grids is recorded as stress concentration area.

[0057] The beneficial effect of this step is: the stress distance of the shortest path distance between each second stress anomaly grid and the nearest first stress anomaly grid measures the degree of proximity between the spatial positions of stress anomaly grids in two different areas. The stress distance can help determine the specific location of stress concentration inside the cable structure, and further analyze the possible stress concentration degree in these areas and its impact on the structural strength.

[0058] S400, obtaining the stress buckling stress of the stress concentration area in the finite element area of ​​the package layer, and obtaining the stress buckling area through the stress buckling stress;

[0059] The method for obtaining the stress buckling stress includes: adding the maximum stress range difference through BT2, where the maximum stress range difference is the product of BT2 and the stress ratio, where the stress ratio is and ratio.

[0060] Among them, the stress-distance ratio refers to the proportional relationship between the average value of the local stress value of each grid in the structure and the distance of each grid to the overall average stress distance and the starting stress of the abnormal stress range. In finite element analysis, the stress-distance ratio can reveal the stress distribution characteristics of different areas in the structure. The high or low stress-distance ratio reflects the uniformity of the internal stress of the structure and a derivative abnormal stress difference of possible stress concentration.

[0061] The maximum stress range difference describes the derived abnormal stress difference between the local stress value and the average stress in the stress concentration area. The maximum stress range difference can quantitatively show the stage stress of the unevenness of stress distribution and its potential impact on the strength and safety of the structure, so as to take appropriate strengthening or optimization measures to ensure the stability and reliability of the structure when it is subjected to mechanical loads.

[0062] The stress concentration meshes in the stress concentration area with stress values ​​greater than the buckling stress are recorded as stress buckling meshes, and the area composed of all stress buckling meshes is recorded as stress buckling area;

[0063] The beneficial effect of this step is that the stress distribution characteristics of different areas in the structure can be accurately reflected through the stress distance ratio. By comparing the local stress value of each grid with the sum of the average stress distances of the surrounding grids and the overall average stress distance, possible stress concentration areas and abnormal stress differences can be clearly identified. Different stress distance ratios reflect the uniformity of stress inside the structure. When the stress distance ratio is high, it means that the stress distribution in each area of ​​the structure is relatively uniform, and the stability and reliability of the structure are relatively high; while a low stress distance ratio indicates stress concentration, which requires further structural adjustment or reinforcement measures.

[0064] S500: Mark the stress buckling area of ​​the three-dimensional model of the cable core wire with a color to obtain a new three-dimensional model of the cable core wire.

[0065] The 3D model of the cable core is color-coded, with stress concentration areas marked in yellow, stress buckling areas marked in red, and the remaining areas marked in green; the remaining areas are the areas composed of all meshes in the 3D model of the cable core that do not belong to the stress concentration area and stress buckling area. This color coding helps to intuitively display the stress distribution and quickly identify potential structural problem areas.

[0066] The 3D model with the marked stress buckling area is saved as a new 3D model file. This new 3D model not only contains the original geometry and structure information, but also includes the stress analysis result information, which is visualized in color.

[0067] Furthermore, the stress concentration area and stress buckling area of ​​the cable core wire wrapping layer analyzed by finite element analysis are subjected to elastic material processing, wherein the specific steps of the processing include:

[0068] Silicone rubber is selected to be covered around the stress concentration area and stress buckling area of ​​the cable core sheath through coating equipment, wherein the amount of silicone rubber coated on the stress buckling area is twice that of the stress concentration area. After coating, the silicone rubber is fully cooled and cured to ensure its stability and durability.

[0069] According to the method of the present invention, it is possible to detect and analyze the stress concentration and stress buckling of the sheath of the cable core under stress conditions, find the buckling area, perform preventive maintenance and improve the design, and avoid damage or buckling of the sheath that affects the structural integrity of the internal core and causes the internal core to be exposed or damaged, affecting the electrical performance of the cable core.

[0070] Figure 2 Shown is the structural diagram of the cable core covering system.

[0071] Reference Figure 2 The present invention also proposes a cable core covering system 20, the cable core covering system 20 comprising: a processor, a memory and a computer program stored in the memory and executable on the processor, the processor implementing the steps in a cable core covering method when executing the computer program, the cable core covering system 20 running on a desktop computer, a notebook, a PDA and a computing device in a cloud data center.

[0072] The packaging system comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to run in the following units of the packaging system:

[0073] The acquisition unit 21 is used to obtain a three-dimensional model of the cable core wire; the three-dimensional model of the cable core wire is loaded into the finite element analysis software, and the three-dimensional model of the cable core wire is meshed by a meshing algorithm to obtain a finite element model of the cable core wire;

[0074] An identification unit 22 is used to identify the core wire area and the wrapping layer area of ​​the cable core wire finite element model, and obtain the core wire finite element area and the wrapping layer finite element area of ​​the cable core wire finite element model;

[0075] An analysis unit 23 is used to perform finite element stress analysis on the core wire finite element region and the wrapping layer finite element region according to the obtained core wire finite element region and the wrapping layer finite element region, so as to obtain a stress concentration region of the wrapping layer finite element region;

[0076] A calculation unit 24 is used to obtain the stress buckling stress of the stress concentration area of ​​the finite element area of ​​the wrapping layer, and obtain the stress buckling area through the stress buckling stress;

[0077] The marking unit 25 is used to color-mark the stress buckling area of ​​the three-dimensional model of the cable core wire to obtain a new three-dimensional model of the cable core wire.

[0078] The cable core coating system can be run in computing devices such as desktop computers, notebooks, PDAs, and cloud servers. The cable core coating system can include, but is not limited to, a processor and a memory. Those skilled in the art can understand that the example is only an example of a cable core coating system 20, and does not constitute a limitation on a cable core coating system 20, which can include more or less components than the example, or a combination of certain components, or different components. For example, the cable core coating system can also include input and output devices, network access devices, buses, etc.

[0079] By implementing the cable core coating method through the cable core coating system 20, it is possible to detect and analyze the stress concentration and stress buckling of the coating layer of the cable core under stress conditions, discover the buckling area, perform preventive maintenance and improve the design, and avoid damage or buckling of the coating layer that affects the structural integrity of the internal core and causes the internal core to be exposed or damaged, affecting the electrical performance of the cable core.

[0080] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0081] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0083] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0084] In addition, the terms "first", "second", etc. used in the embodiments of the present invention are only used for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated in the present embodiment. Therefore, the features defined by the terms "first", "second", etc. in the embodiments of the present invention can explicitly or implicitly indicate that the embodiment includes at least one of the features. In the description of the present invention, the word "multiple" means at least two or two or more, such as two, three, four, etc., unless otherwise clearly and specifically defined in the embodiments.

[0085] In the present invention, unless otherwise clearly specified or limited in the embodiments, the terms "installed", "connected", "connected" and "fixed" etc. in the embodiments should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements, or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific implementation situation.

[0086] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0087] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A cable core wire coating method, characterized in that: The method comprises the following steps: S100, obtaining a three-dimensional model of the cable core wire; loading the three-dimensional model of the cable core wire into finite element analysis software, meshing the three-dimensional model of the cable core wire using a meshing algorithm, and obtaining a finite element model of the cable core wire; S200, identifying a core wire region and a sheath layer region of a cable core wire finite element model, and obtaining a core wire finite element region and a sheath layer finite element region of the cable core wire finite element model; S300, according to the obtained core wire finite element area and wrapping layer finite element area, perform finite element stress analysis on the core wire finite element area and the wrapping layer finite element area to obtain the stress concentration area of ​​the wrapping layer finite element area; wherein step S300 includes: importing the core wire finite element area and the wrapping layer finite element area into finite element analysis software, obtaining the stress magnitude of each grid in the core wire finite element area and the wrapping layer finite element area through stress analysis in the finite element analysis software, and recording the stress magnitude of the i-th grid in the core wire finite element area as D(i), i=1,2,…,M, M is the number of all grids in the core wire finite element area, and D(1 ), D(2), …, D(M) form the first stress sequence and record it as Stress1. The element with the largest value in the first stress sequence is recorded as DT1, and the average value of all values ​​in the first stress sequence is recorded as DT2. The stress magnitude of the i-th grid in the finite element region of the package layer is recorded as B(j), j=1,2,…,H, H is the number of all grids in the finite element region of the package layer, and the second stress sequence composed of B(1), B(2), …, B(H) is recorded as Stress2. The element with the largest value in the second stress sequence is recorded as BT1, and the average value of all values ​​in the second stress sequence is recorded as BT2. The average value of DT2 and DT1 is calculated. The average value is calculated and recorded as DTK; the average value of BT1 and BT2 is calculated and recorded as BTK; the stress values ​​in the range of [DTK, DT1] in the first stress sequence are recorded as the first abnormal stress range, and the stress values ​​in the range of [BTK, BT1] in the second stress sequence are recorded as the second abnormal stress range; the grids whose stress values ​​in the core finite element area are in the first abnormal stress range are recorded as the first stress abnormal grids, and the grids whose stress values ​​in the wrapping layer finite element area are in the second abnormal stress range are recorded as the second stress abnormal grids; the stress distance between each second stress abnormal grid and the first stress abnormal grid is obtained, wherein each second stress abnormal grid The stress distance between the grid and the first stress anomaly grid is the length of the smallest line segment among the line segment lengths between the grid center point of the second stress anomaly grid and the grid center points of all first stress anomaly grids; X(p) represents the distance between the pth second stress anomaly grid and the first stress anomaly grid, BK(p) represents the stress magnitude of the pth second stress anomaly grid, where p∈[1,n], and n is the number of second stress anomaly grids; the average value of all X(p) is XK, all second stress anomaly grids with stress distances lower than XK are recorded as stress concentration grids, and the area composed of all stress concentration grids is recorded as stress concentration area; S400, obtaining the stress buckling stress of the stress concentration area of ​​the finite element area of ​​the package layer, and obtaining the stress buckling area through the stress buckling stress; wherein the method for obtaining the stress buckling stress includes: adding the maximum stress range difference through BT2; wherein the maximum stress range difference is the product of BT2 and the stress ratio, wherein the stress ratio is and The stress concentration meshes in the stress concentration area with stress values ​​greater than the buckling stress are recorded as stress buckling meshes, and the area composed of all stress buckling meshes is recorded as stress buckling area; S500: Mark the stress buckling area of ​​the three-dimensional model of the cable core wire with a color to obtain a new three-dimensional model of the cable core wire.

2. A cable core coating method according to claim 1, characterized in that: In step S200, the core area and the wrapping layer area of ​​the cable core finite element model are identified, and the cable core finite element model and the wrapping layer finite element model are obtained, including: obtaining the core finite element area and the wrapping layer finite element area of ​​the cable core finite element model by feature extraction or ROI region of interest division.

3. A cable core wire coating system, characterized in that: The cable core covering system comprises: a processor, a memory and a computer program stored in the memory and running on the processor, wherein the processor implements the steps of the cable core covering method described in any one of claims 1 to 2 when executing the computer program, and the cable core covering system runs on a desktop computer, a laptop computer, a PDA or a cloud data center.

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