Optimization method and device for electromagnetic coupling of vehicle wire harness, computer equipment and medium

Abstract

The invention relates to the technical field of vehicle wire harness design, and discloses a vehicle wire harness electromagnetic coupling optimization method and device, computer equipment and a medium. A whole vehicle electromagnetic model and a whole vehicle high-low voltage wire harness model are constructed, and the whole vehicle high-voltage wire harness model and the whole vehicle low-voltage wire harness model are coupled based on the whole vehicle electromagnetic model; and a whole vehicle simulation model is obtained. And then, determining a coupling result of the low-voltage wire harness in the whole vehicle simulation model under the interference of the high-voltage wire harness, and realizing accurate quantification of the coupling high-voltage interference of the low-voltage wire harness according to the coupling result. And finally, the low-voltage risk wire harness and the high-voltage interference wire harness causing the coupling risk of the low-voltage risk wire harness are optimized, so that the coupling risk area of the low-voltage wire harness is effectively eliminated, normal use of low-voltage electric appliances of an automobile is ensured, and the safety of the automobile is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle wiring harness design, and in particular to an optimization method, device, computer equipment and medium for electromagnetic coupling of a vehicle wiring harness. Background Art

[0002] Compared with traditional cars that use low-voltage electrical appliances, new energy vehicles mainly add high-voltage systems. The high voltage and high current flowing through the high-voltage system harnesses bring electromagnetic coupling risks to the existing low-voltage power lines and signal harness systems in the car. In addition, with the intensification of competition in the automotive market and the cost demands of car manufacturers, the high-voltage harnesses of many models in the industry have been reduced from shielded high-voltage wires to unshielded high-voltage wires, which has exacerbated the design difficulties of the low-voltage harness system in the car to resist the risk of electromagnetic coupling.

[0003] At present, the existing technology often calculates the electromagnetic radiation of the high-voltage wire harness by loading the current data and impedance data at different frequencies into the excitation circuit, or judges the electromagnetic coupling risk of the wire harness by simulating the whole vehicle model. However, the above method cannot calculate the coupling signal value of a specific low-voltage wire harness in the vehicle, and cannot provide guidance for the selection of low-voltage wire harnesses and the layout of high and low voltage wire harnesses in the vehicle when designing the wire harness to resist electromagnetic coupling risks. In addition, the modeling efficiency is low when building the whole vehicle model, which reduces the efficiency of wire harness design and increases the potential risk of electromagnetic coupling of the wire harness. Summary of the invention

[0004] In view of this, the present invention provides a method, device, computer equipment and medium for optimizing electromagnetic coupling of vehicle wiring harnesses, so as to solve the problem that the prior art is unable to quantitatively calculate the coupling signal value of a specific low-voltage wiring harness in a vehicle, and it is difficult to determine the selection of low-voltage wiring harnesses and the layout positions of high and low voltage wiring harnesses during wiring harness design, resulting in low wiring harness design efficiency and the risk of wiring harness electromagnetic coupling.

[0005] In a first aspect, the present invention provides a method for optimizing electromagnetic coupling of a vehicle wiring harness, the method comprising:

[0006] Based on the vehicle structure parameters, the vehicle electromagnetic model, high-voltage wiring harness model and low-voltage wiring harness model are constructed;

[0007] Based on the vehicle structure parameters, the vehicle electromagnetic model, high-voltage wiring harness model and low-voltage wiring harness model are coupled to obtain a vehicle simulation model;

[0008] The whole vehicle simulation model is used to perform electromagnetic coupling simulation to obtain the low-voltage harness coupling results under the interference of the high-voltage harness;

[0009] Based on the low-voltage harness coupling results, the low-voltage risk harness and the high-voltage interference harness corresponding to the low-voltage risk harness are determined, and the low-voltage risk harness and the high-voltage interference harness are optimized.

[0010] Beneficial effects: The present invention constructs a whole vehicle electromagnetic model and a whole vehicle high and low voltage wiring harness model, and couples the whole vehicle high voltage wiring harness and low voltage wiring harness model based on the whole vehicle electromagnetic model to obtain a whole vehicle simulation model. Then, the coupling result of the low voltage wiring harness under the interference of the high voltage wiring harness in the whole vehicle simulation model is determined, and the accurate quantification of the low voltage wiring harness coupling high voltage interference is achieved according to the coupling result. Finally, the low voltage risk wiring harness and the high voltage interference wiring harness that causes the coupling risk are optimized, and the low voltage wiring harness coupling risk area is effectively eliminated, which ensures the normal use of the low voltage electrical appliances in the car and improves the safety of the vehicle.

[0011] In some optional implementations, based on the vehicle structure parameters, the vehicle electromagnetic model, the high-voltage wiring harness model and the low-voltage wiring harness model are coupled to obtain a vehicle simulation model, including:

[0012] According to the vehicle structure parameters, the excitation source parameters, wiring harness electrical parameters and wiring harness layout position are obtained;

[0013] An excitation source corresponding to the high-voltage wiring harness model is set based on the excitation source parameters, and port circuit parameters corresponding to the high-voltage wiring harness model and the low-voltage wiring harness model are set based on the wiring harness electrical parameters to obtain a target high-voltage wiring harness model and a target low-voltage wiring harness model;

[0014] Based on the wiring harness layout position, the vehicle electromagnetic model, target high-voltage wiring harness model and target low-voltage wiring harness model are integrated and meshed to obtain a vehicle simulation model.

[0015] Beneficial effects: This application analyzes the spatial position relationship of the wiring harness according to the wiring harness layout position, integrates, meshes, and sets the port circuit and excitation source parameters of the previously constructed vehicle electromagnetic model, high-voltage wiring harness model, and low-voltage wiring harness model to obtain a vehicle simulation model, thereby ensuring the integrity of the parameter settings and helping to improve the accuracy of the simulation results.

[0016] In some optional implementations, electromagnetic coupling simulation is performed using a vehicle simulation model to obtain low-voltage harness coupling results under high-voltage harness interference, including:

[0017] Determine the operating frequency range of the high-voltage wiring harness, and obtain the highest interference frequency of the high-voltage wiring harness based on the operating frequency range;

[0018] The vehicle wiring harness is simulated by electromagnetic coupling using the whole vehicle simulation model to obtain the coupling voltage / current value of each low-voltage wiring harness corresponding to the highest interference frequency.

[0019] Beneficial effect: The present invention determines the highest interference frequency of the high-voltage wiring harness and uses the whole vehicle simulation model to solve the coupling voltage / current value coupled on the low-voltage wiring harness within the highest interference frequency. It has high accuracy and can quantify the interference of the high-voltage wiring harness on the low-voltage wiring harness, which is convenient for optimizing the high and low voltage wiring harnesses.

[0020] In some optional implementations, determining a low-voltage risk harness and a high-voltage interference harness corresponding to the low-voltage risk harness based on the low-voltage harness coupling result includes:

[0021] Determine whether the coupling voltage / current value of each low-voltage wiring harness is less than a preset voltage / current value;

[0022] For each low-voltage wiring harness, if the coupling voltage / current value of the current low-voltage wiring harness is not less than the preset voltage / current value, the current low-voltage wiring harness is determined to be a low-voltage risk wiring harness, and the high-voltage wiring harness whose wiring harness distance to the low-voltage risk wiring harness is less than the preset wiring harness distance is determined to be a high-voltage interference wiring harness.

[0023] Beneficial effect: The present application determines the abnormal harnesses existing in the current low-voltage harness arrangement by comparing the coupling voltage / current values ​​of the low-voltage harness coupling with the preset voltage / current values. It can accurately find the low-voltage risk harnesses with coupling risks in the current arrangement position and the high-voltage interference harnesses that cause them to have coupling risks, thereby facilitating guidance on harness optimization.

[0024] In some optional implementations, the low-voltage risk harness and the high-voltage interference harness are optimized, including:

[0025] Increase the harness distance between the low-voltage risk harness and the high-voltage interference harness;

[0026] and / or, change the shielding material of low voltage risk harnesses;

[0027] And / or, reduce the external radiation of high-voltage interference wiring harness.

[0028] Beneficial effect: After determining the position of the low-voltage wiring harness with coupling risk, the embodiment of the present application can optimize the low-voltage risk wiring harness and the high-voltage interference wiring harness by various methods such as wiring harness routing position change processing, line type category change processing and high-voltage component parameter change processing, effectively reduce the coupling risk between the high and low voltage wiring harnesses, obtain an ideal low-voltage wiring harness state design, and help ensure the safe driving of the vehicle.

[0029] In some optional implementations, based on the vehicle structure parameters, a vehicle electromagnetic model, a high-voltage wiring harness model, and a low-voltage wiring harness model are constructed, including:

[0030] Based on the vehicle structure parameters, the physical model of each metal component of the vehicle and the wiring harness structure parameters corresponding to the high-voltage wiring harness and the low-voltage wiring harness are obtained; wherein the wiring harness structure parameters include core line coordinate data and wiring harness cross-section parameters;

[0031] Extract the node coordinate data in the physical model of each metal part of the vehicle, reconstruct the model according to the node coordinate data, and obtain the electromagnetic model of the vehicle;

[0032] Models are constructed according to the wiring harness structural parameters corresponding to the high-voltage wiring harness and the low-voltage wiring harness, respectively, to obtain a high-voltage wiring harness model and a low-voltage wiring harness model.

[0033] Beneficial effects: The embodiment of the present application obtains a physical model containing the three-dimensional data of the whole vehicle, performs multi-software joint modeling based on the physical model, realizes the reconstruction of the electromagnetic model of the whole vehicle, thereby obtaining the electromagnetic model of the whole vehicle, and improving the efficiency of model construction. At the same time, the model is constructed according to the wiring harness structure parameters of the high and low voltage wiring harnesses to obtain the high and low voltage wiring harness models, and the accuracy of the wiring harness models is improved by parameter setting.

[0034] In some optional implementations, extracting node coordinate data in the physical model of each metal component of the vehicle includes:

[0035] The physical model of each metal part of the vehicle is divided into multiple grid units, and the multiple grid units are subjected to geometric feature filtering and edge processing to obtain multiple target grid units;

[0036] According to the node information corresponding to each target grid unit, the node coordinate data is obtained.

[0037] Beneficial effects: The present invention obtains a simplified mesh model by meshing the physical model of each metal part of the vehicle, filtering geometric features and edges, and extracting the node coordinate data of each mesh unit in the mesh model to facilitate electromagnetic reconstruction of the vehicle model and subsequent electromagnetic simulation, which is conducive to improving modeling efficiency and simulation efficiency. At the same time, the calculation efficiency is effectively improved by meshing the model, and the material properties of the key parts of the vehicle are set to ensure the accuracy of the model.

[0038] In some optional implementations, models are constructed according to the wiring harness structural parameters corresponding to the high-voltage wiring harness and the low-voltage wiring harness, respectively, to obtain a high-voltage wiring harness model and a low-voltage wiring harness model, including:

[0039] Based on the core line coordinate data corresponding to the high-voltage wiring harness and the low-voltage wiring harness, respectively, the central core line path models corresponding to the high-voltage wiring harness and the low-voltage wiring harness are constructed; the high-voltage wiring harness includes at least one of the electric drive wiring harness and the battery pack wiring harness, and the low-voltage wiring harness includes at least one of the chassis wiring harness, the instrument panel wiring harness and the front cabin wiring harness;

[0040] Based on the wire harness cross-section parameters corresponding to the high-voltage wire harness, parameters of the central core wire path model corresponding to the high-voltage wire harness are set to obtain a high-voltage wire harness model; wherein the wire harness cross-section parameters include at least one of a wire harness diameter, a wire harness type, and a wire harness shielding information;

[0041] Based on the wire harness cross-section parameters corresponding to the low-voltage wire harness, parameters of the center core wire path model corresponding to the low-voltage wire harness are set to obtain a low-voltage wire harness model.

[0042] Beneficial effects: The present invention determines the connection of the wire harnesses through the core line coordinate data of the high-voltage wire harnesses of the electric drive and battery pack, and constructs the high-voltage wire harness models of the electric drive and battery pack according to the connection between the wire harnesses; at the same time, in order to ensure the accuracy of the high-voltage wire harness model data, the wire harness cross-sectional parameters of the high-voltage wire harness are accurately set. The connection of the wire harnesses is determined through the core line coordinate data of the low-voltage wire harnesses of the chassis, instrument panel, and front cabin, and constructs the low-voltage wire harness models of the chassis, instrument panel, and front cabin according to the connection between the wire harnesses; at the same time, in order to ensure the accuracy of the low-voltage wire harness model data, the cross-sectional parameters of the low-voltage wire harness are accurately set, thereby improving the accuracy of the high and low voltage wire harness model simulation.

[0043] In a second aspect, the present invention provides a device for optimizing electromagnetic coupling of a vehicle wiring harness, the device comprising:

[0044] The first processing module is used to construct a vehicle electromagnetic model, a high-voltage wiring harness model and a low-voltage wiring harness model based on the vehicle structure parameters;

[0045] The second processing module is used to couple the vehicle electromagnetic model, the high-voltage wiring harness model and the low-voltage wiring harness model based on the vehicle structure parameters to obtain a vehicle simulation model;

[0046] The third processing module is used to perform electromagnetic coupling simulation using the whole vehicle simulation model to obtain the low voltage harness coupling result under the interference of the high voltage harness;

[0047] The fourth processing module is used to determine the low-voltage risk harness and the high-voltage interference harness corresponding to the low-voltage risk harness based on the low-voltage harness coupling result, and optimize the low-voltage risk harness and the high-voltage interference harness.

[0048] In a third aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method for optimizing electromagnetic coupling of a vehicle wiring harness according to the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0049] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the method for optimizing electromagnetic coupling of a vehicle wiring harness according to the first aspect or any corresponding embodiment thereof.

[0050] Beneficial effects of the present invention:

[0051] The present invention constructs a whole vehicle electromagnetic model and a whole vehicle high and low voltage wiring harness model, and couples the whole vehicle high voltage wiring harness and low voltage wiring harness model based on the whole vehicle electromagnetic model to obtain a whole vehicle simulation model. Then, the coupling result of the low voltage wiring harness under the interference of the high voltage wiring harness in the whole vehicle simulation model is determined, and the accurate quantification of the low voltage wiring harness coupling high voltage interference is achieved according to the coupling result. Finally, the low voltage risk wiring harness and the high voltage interference wiring harness that causes the coupling risk are optimized, and the low voltage wiring harness coupling risk area is effectively eliminated, which ensures the normal use of the low voltage electrical appliances in the car and improves the safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 is a flow chart of a method for optimizing electromagnetic coupling of a vehicle wiring harness according to an embodiment of the present invention;

[0054] Figure 2 is a flow chart of another method for optimizing electromagnetic coupling of a vehicle wiring harness according to an embodiment of the present invention;

[0055] Figure 3 is a schematic diagram of a process of constructing an electromagnetic model of a whole vehicle according to an embodiment of the present invention;

[0056] Figure 4 is a schematic diagram of a simplified process for processing a vehicle physical model according to an embodiment of the present invention;

[0057] Figure 5 is a structural schematic diagram of a whole vehicle electromagnetic model according to an embodiment of the present invention;

[0058] Figure 6 is a flow chart of a high and low voltage wiring harness simulation optimization method according to an embodiment of the present invention;

[0059] Figure 7 is a flow chart of another high and low voltage wiring harness simulation optimization method according to an embodiment of the present invention;

[0060] Figure 8 is a schematic diagram of a high and low voltage wiring harness simulation result according to an embodiment of the present invention;

[0061] Fig. 9 2 is a schematic diagram of a vehicle high and low voltage wiring harness electromagnetic coupling simulation analysis system according to an embodiment of the present invention;

[0062] Fig.10 is a structural block diagram of a device for optimizing electromagnetic coupling of a vehicle wiring harness according to an embodiment of the present invention;

[0063] Fig.11 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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 described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0065] Compared with the 12V low-voltage field of traditional automotive electrical appliances, the new energy vehicle field mainly adds a high-voltage system. The high voltage and high current flowing through the high-voltage system harness bring electromagnetic coupling risks to the original low-voltage power lines and signal harness systems in the car. In addition, with the intensification of competition in the automotive market and the cost demands of car manufacturers, the high-voltage harnesses of many models in the industry have been reduced from shielded high-voltage wires to unshielded high-voltage wires, which has exacerbated the design difficulties of the low-voltage harness system in the car to resist the risk of electromagnetic coupling.

[0066] The related technology loads the current data and impedance data of the electric drive high-voltage AC wiring harness that changes with frequency into the excitation circuit to calculate the electromagnetic radiation of the wiring harness. However, in the layout and design of the high and low voltage wiring harnesses of the whole vehicle, it is impossible to predict in advance the risk of electromagnetic coupling of the designed high and low voltage wiring harnesses, and it is impossible to determine the size of the high-voltage signal value coupled to a specific low-voltage wiring harness in the vehicle. In addition, it is impossible to provide an accurate and quantifiable design plan for the electromagnetic coupling risk in the selection and layout of the low-voltage wiring harness.

[0067] In view of the above problems, an embodiment of the present invention provides an optimization method for electromagnetic coupling of vehicle wiring harnesses, by constructing a three-dimensional electromagnetic model of the whole vehicle and a high- and low-voltage wiring harness model of the whole vehicle, and setting the port circuit and excitation source parameters of the high-voltage wiring harness and low-voltage wiring harness models of the whole vehicle based on the three-dimensional electromagnetic model of the whole vehicle, so as to obtain a simulation model of the whole vehicle. Then, the solution result of the low-voltage wiring harness coupling value in the whole vehicle simulation model is determined by a solution algorithm, and the accurate quantification of the high-voltage interference of the low-voltage wiring harness coupling is achieved according to the solution result. At the same time, the coupling optimization method is used to optimize the low-voltage wiring harness coupling risk area, and the low-voltage wiring harness coupling risk area is effectively eliminated, thereby ensuring the normal use of low-voltage electrical appliances in the automobile and improving the safety of the vehicle. As a result, the problem of the coupling signal of the low-voltage wiring harness cannot be effectively solved with the use of high-voltage non-shielded wiring harness products in the related art is solved, which leads to the failure of the function of the low-voltage electrical appliance components and the inability to meet the normal use requirements of the driver for the vehicle.

[0068] According to an embodiment of the present invention, an embodiment of a method for optimizing electromagnetic coupling of a vehicle wiring harness 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.

[0069] In this embodiment, a method for optimizing electromagnetic coupling of vehicle wiring harness is provided, which can be used for electronic equipment or computer equipment for wiring harness design, such as computers, etc. Figure 1 is a flow chart of a method for optimizing electromagnetic coupling of a vehicle wiring harness according to an embodiment of the present invention, such as Figure 1 As shown, the process includes the following steps:

[0070] Step S101, constructing a vehicle electromagnetic model, a high-voltage wiring harness model and a low-voltage wiring harness model based on the vehicle structural parameters.

[0071] Specifically, the vehicle structure parameters include excitation source parameters, wiring harness electrical parameters, wiring harness layout position, physical models of various metal parts of the vehicle, wiring harness structure parameters corresponding to the high-voltage wiring harness and low-voltage wiring harness respectively, and other parameters, which are used to build accurate vehicle models and high and low voltage wiring harness models.

[0072] It should be noted that in electromagnetic simulation, due to the strong coupling interference of vehicle metal parts, it is possible to focus on building the electromagnetic model of the entire vehicle based on the physical model of the metal parts. This will not affect the accuracy of the coupling simulation and can also improve the modeling efficiency.

[0073] In addition, high-voltage wiring harnesses often have greater coupling interference with low-voltage wiring harnesses. In order to ensure the normal use of low-voltage electrical appliances during wiring harness design, it is necessary to accurately determine whether the low-voltage wiring harnesses have coupling risks. If risk judgments are made for the entire vehicle wiring harness one by one, the requirements for computing resources are high and time-consuming. Therefore, the high and low voltage wiring harness models can be constructed separately, which does not affect the accuracy of the wiring harness coupling risk analysis and can also achieve the purpose of saving computing resources and improving model calculation efficiency.

[0074] Step S102, based on the vehicle structure parameters, coupling processing is performed on the vehicle electromagnetic model, the high-voltage wiring harness model and the low-voltage wiring harness model to obtain a vehicle simulation model.

[0075] Specifically, the spatial position relationship between the high and low voltage wiring harnesses and the vehicle electromagnetic model is analyzed based on the wiring harness layout position in the vehicle structure parameters, and the model is better integrated. The port circuit and excitation source of the wiring harness are set through the excitation source parameters and wiring harness electrical parameters to obtain a more accurate vehicle simulation model, which can improve the accuracy of the coupled simulation.

[0076] Step S103, performing electromagnetic coupling simulation using the whole vehicle simulation model to obtain a low voltage harness coupling result under high voltage harness interference.

[0077] Specifically, the interference frequency of the high-voltage wiring harness is set and the whole vehicle simulation model is used for simulation to obtain the coupling result of the low-voltage wiring harness under the interference frequency of the high-voltage wiring harness, so as to judge whether the low-voltage wiring harness has a coupling risk according to the coupling result.

[0078] Step S104, based on the low-voltage harness coupling result, determine the low-voltage risk harness and the high-voltage interference harness corresponding to the low-voltage risk harness, and optimize the low-voltage risk harness and the high-voltage interference harness.

[0079] Specifically, the low-voltage wiring harness is compared with the set coupling fluctuation value, and whether the low-voltage wiring harness has a coupling risk is judged based on the comparison result, thereby obtaining a low-voltage risk wiring harness with a coupling risk and a high-voltage interference wiring harness that causes it to have a coupling risk, so as to optimize the low-voltage risk wiring harness and the high-voltage interference wiring harness, thereby eliminating the low-voltage wiring harness coupling risk area and ensuring the normal use of low-voltage electrical appliances.

[0080] The method for optimizing electromagnetic coupling of vehicle harnesses provided in this embodiment is to obtain a simulation model of the whole vehicle by constructing an electromagnetic model of the whole vehicle and a high- and low-voltage harness model of the whole vehicle, and setting the port circuit and excitation source parameters of the high-voltage harness and low-voltage harness models of the whole vehicle based on the electromagnetic model of the whole vehicle. Then, the coupling result of the low-voltage harness under the interference of the high-voltage harness in the whole vehicle simulation model is determined, and the accurate quantification of the high-voltage interference of the low-voltage harness coupling is achieved according to the coupling result. Finally, the low-voltage risk harness and the high-voltage interference harness that causes the coupling risk are optimized, and the low-voltage harness coupling risk area is effectively eliminated, thereby ensuring the normal use of the low-voltage electrical appliances in the vehicle and improving the safety of the vehicle.

[0081] In this embodiment, a method for optimizing electromagnetic coupling of vehicle wiring harness is provided, which can be used for electronic equipment or computer equipment for wiring harness design, such as computers, etc. Figure 2 is a flow chart of a method for optimizing electromagnetic coupling of a vehicle wiring harness according to an embodiment of the present invention, such as Figure 2 As shown, the process includes the following steps:

[0082] Step S201, constructing a vehicle electromagnetic model, a high-voltage wiring harness model and a low-voltage wiring harness model based on the vehicle structural parameters.

[0083] Specifically, the above step S201 includes:

[0084] Step S2011, based on the vehicle structure parameters, obtain the physical model of each metal component of the vehicle, and the wiring harness structure parameters corresponding to the high-voltage wiring harness and the low-voltage wiring harness respectively.

[0085] Specifically, the wire harness structural parameters include core line coordinate data and wire harness cross-sectional parameters.

[0086] Step S2012, extracting the node coordinate data in the physical model of each metal component of the whole vehicle, reconstructing the model according to the node coordinate data, and obtaining the electromagnetic model of the whole vehicle.

[0087] Specifically, the physical model of each metal component of the vehicle is divided into multiple grid units, and the multiple grid units are subjected to geometric feature filtering and edge processing to obtain multiple target grid units, and the node coordinate data is obtained according to the node information corresponding to each target grid unit.

[0088] In some optional implementations, it is first necessary to establish a three-dimensional electromagnetic model of the vehicle. Figure 3 As shown in the figure, the process of establishing the three-dimensional electromagnetic model of the whole vehicle is as follows:

[0089] First, obtain the 3D CATIA data model of the vehicle. The CATIA data model is a type of CAD model. For example, the CAD model of the seat is as follows: Figure 4 shown.

[0090] Secondly, the CATIA model of the whole vehicle is split into several key components according to its geometric characteristics, focusing on metal parts such as the hood, engine, side fenders, doors, frame, roof, trunk lid and chassis, and obtaining the physical model of each metal part of the vehicle (i.e., CATIA model).

[0091] Then, each component is processed separately in HyperMesh, and the model is simplified and meshed based on HyperMesh. After the CATIA models of the key components of the vehicle are imported into HyperMesh, refer to Figure 4 , the HyperMesh model contains many small geometric features such as chamfers, fillets, and small areas surrounded by lines. By setting the target element size (Target Element Size) and selecting Auto Clean Up, the parts smaller than the set target element size (target element size) will be automatically deleted. After the automatic cleanup is completed, most of the small geometric features will be cleaned up, but there will still be some lines that will form singular elements, so further cleanup is required. The lines (Line) and points (Point) in the model can be manually processed through the Quick Edit panel (Quick Edit), and the toggle edge command can be used to delete the remaining few lines to make them into larger area structures and improve the model structure accuracy. See again Figure 4 , and obtain the simplified mesh model.

[0092] Finally, the electromagnetic compatibility (EMC) three-dimensional mesh model of the whole vehicle is constructed based on Matlab. The information of the Hypermesh data output file needs to be extracted using Matlab language programming, and then output in the form of a text file so that the electromagnetic simulation software can read it. First, extract the three node numbers of each unit in the unit information segment in the Hypermesh data output file (each mesh unit includes three nodes), and then traverse the node information segment by number to extract the node coordinate data. The algorithm for extracting node coordinate data in Matlab is as follows:

[0093] 1) Extract the node corresponding to unit i from the queue of unit information segments in order, and read the numbers of its three vertices: node1, node2, and node3;

[0094] 2) Find the coordinates of the three nodes of unit i in the node information segment {(xil, yil, zi1), (xi2, yi2, zi2), (xi3, yi3, zi3)};

[0095] 3) Output the coordinate data of the node corresponding to unit i into a text file line by line.

[0096] The present invention obtains a simplified mesh model by meshing, geometric feature filtering and edge filtering the physical model of each metal component of the whole vehicle, and extracts the node coordinate data of each mesh unit in the mesh model to facilitate electromagnetic reconstruction of the whole vehicle model and subsequent electromagnetic simulation, which is beneficial to improving modeling efficiency and simulation efficiency.

[0097] After extracting the node coordinate data of the HyperMesh output model with Matlab and saving it as a text file, the VBS script program in the electromagnetic simulation software can be used to reconstruct the EMC entity model of the whole vehicle. Since the electromagnetic simulation software cannot run VBS script programs in other software environments, it is necessary to first form a VBS script file in the software environment, and then perform secondary development on the script file in Matlab, and read in the node coordinate data in the text file extracted by Matlab in the early stage, so as to reconstruct the required EMC entity model of the whole vehicle. For example, some of the Matlab programs for secondary development are:

[0098] Set oAnsoftApp=CreateObject("Ansoft

[0099] Hfss.HfssScriptInterface")

[0100] Set oDesktop=oAnsoftApp.GetAppDesktop()

[0101] oDesktop.RestoreWindow

[0102] Set oProject=oDesktop.SetActive

[0103] Project("Project3")

[0104] Set oDesign=oProject.SetActive

[0105] Design("HFSSDesign1")

[0106] Set oEditor=oDesign.SetActiveEditor

[0107] ("3D Modeler")

[0108] Dim fso,fr,a,b,j,sj(6),sj1(6),sj2(6),

[0109] sj3(6),path,name

[0110] At this point, the whole vehicle VBS script file obtained through secondary development in Matlab is opened in the corresponding electromagnetic simulation software to obtain the whole vehicle electromagnetic model suitable for EMC simulation. Figure 5 The figure shows the electromagnetic model of the whole vehicle obtained through the above steps after three-dimensional simplification of the whole vehicle body structure.

[0111] In the embodiment of the present application, by obtaining the three-dimensional CATIA data model of the whole vehicle, the three-dimensional data model is simplified and meshed by HyperMesh, the mesh data file is extracted with Matlab to obtain the node coordinate data in the HyperMesh output model and secondary development is performed in Matlab, the whole vehicle VBS script file is obtained and opened in the corresponding electromagnetic simulation software to obtain the whole vehicle electromagnetic model suitable for EMC simulation. According to the physical model of the whole vehicle, multi-software joint modeling is performed to obtain the electromagnetic model of the whole vehicle.

[0112] The embodiment of the present application obtains a physical model containing three-dimensional data of the whole vehicle, and performs joint modeling of HyperMesh and Matlab multi-software based on the physical model to achieve reconstruction of the electromagnetic model of the whole vehicle. The calculation efficiency is effectively improved by meshing the model, and the material properties of key parts of the whole vehicle are set to ensure the accuracy of the model, thereby obtaining an electromagnetic model of the whole vehicle.

[0113] Step S2013, constructing models according to the wiring harness structural parameters corresponding to the high-voltage wiring harness and the low-voltage wiring harness, respectively, to obtain a high-voltage wiring harness model and a low-voltage wiring harness model.

[0114] Specifically, based on the core line coordinate data corresponding to the high-voltage wire harness and the low-voltage wire harness, the center core line path models corresponding to the high-voltage wire harness and the low-voltage wire harness are constructed. Then, based on the wire harness cross-section parameters corresponding to the high-voltage wire harness, the center core line path model corresponding to the high-voltage wire harness is parameterized to obtain the high-voltage wire harness model; based on the wire harness cross-section parameters corresponding to the low-voltage wire harness, the center core line path model corresponding to the low-voltage wire harness is parameterized to obtain the low-voltage wire harness model.

[0115] It should be noted that the high-voltage wiring harness includes at least one of the electric drive wiring harness and the battery pack wiring harness, the low-voltage wiring harness includes at least one of the chassis wiring harness, the instrument panel wiring harness and the front cabin wiring harness, and the wiring harness cross-sectional parameters include at least one of the wiring harness diameter, wiring harness type and wiring harness shielding information.

[0116] In some optional embodiments, the three-dimensional model of the high-voltage wire harness of the electric drive and battery pack is obtained according to the core line coordinate file and the cross-sectional parameters of the high-voltage wire harness of the electric drive and battery pack. The process of establishing the high-voltage wire harness model of the electric drive and battery pack is as follows:

[0117] First, the core line coordinate position of the central path of the electric drive and battery pack high-voltage wire harness is obtained, and the obtained core line coordinate position is imported into the simulation software to obtain the core line point coordinate parameters of the high-voltage wire harness in the simulation software. The central core line path model of the three-dimensional model of the electric drive and battery pack high-voltage wire harness is obtained through the core line point coordinate parameters.

[0118] Then, the wire harness cross-sectional parameters of the electric drive and battery pack wire harness are obtained, and the wire harness cross-sectional parameters are accurately set in the simulation software to obtain the high-voltage wire harness model of the electric drive and battery pack wire harness. The wire harness cross-sectional parameters include information such as wire harness diameter, wire harness type, and whether it is a shielded wire.

[0119] The present invention determines the connection of the wire harnesses through the coordinate position relationship of the core wires of the electric drive and battery pack high-voltage wire harnesses, and constructs the high-voltage wire harness model of the electric drive and battery pack according to the connection between the wire harnesses; at the same time, in order to ensure the accuracy of the high-voltage wire harness model data of the electric drive and battery pack, the wire harness cross-section parameters of the electric drive and battery pack wire harnesses are accurately set, and a high-voltage wire harness model for simulating the electric drive and battery pack wire harnesses is obtained.

[0120] In some optional implementations, the three-dimensional model of the chassis, instrument panel, and front cabin low-voltage wiring harness is obtained according to the core line coordinate file and the cross-sectional parameters of the low-voltage wiring harness of the chassis, instrument panel, and front cabin. The process of establishing the chassis, instrument panel, and front cabin low-voltage wiring harness model of the present invention is as follows:

[0121] First, obtain the core line coordinate position of the central path of the low-voltage wiring harness of the chassis, instrument panel, and front cabin, import the obtained core line coordinate position into the simulation software, obtain the core line point coordinate parameters of the low-voltage wiring harness in the simulation software, and obtain the central core line path model of the three-dimensional model of the chassis, instrument panel, and front cabin low-voltage wiring harness through the core line point coordinate parameters.

[0122] Then, the cross-sectional parameters of the low-voltage wiring harnesses of the chassis, instrument panel, and front cabin are obtained, and the cross-sectional parameters of the wiring harnesses are accurately set in the simulation software to obtain the low-voltage wiring harness model for simulating the low-voltage wiring harnesses of the chassis, instrument panel, and front cabin. The cross-sectional parameters of the wiring harnesses include information such as the wiring harness diameter, the wiring harness type, and whether it is a shielded wire.

[0123] This application determines the connection of the wiring harness through the coordinate position relationship of the core wires of the chassis, instrument panel and front cabin low-voltage wiring harness, and constructs the chassis, instrument panel and front cabin low-voltage wiring harness model according to the connection between the wiring harnesses; at the same time, in order to ensure the accuracy of the model data of the chassis, instrument panel and front cabin low-voltage wiring harness, the cross-sectional model parameters of the chassis, instrument panel and front cabin low-voltage wiring harness are obtained and accurately set to obtain the simulation model of the chassis, instrument panel and front cabin low-voltage wiring harness.

[0124] Step S202 , based on the vehicle structure parameters, coupling processing is performed on the vehicle electromagnetic model, the high-voltage wiring harness model and the low-voltage wiring harness model to obtain a vehicle simulation model.

[0125] Specifically, the above step S202 includes:

[0126] Step S2021, obtaining excitation source parameters, wiring harness electrical parameters and wiring harness layout positions according to the vehicle structure parameters.

[0127] Specifically, the excitation source parameters include high-voltage power supply parameters, the wiring harness electrical parameters include port parameters of different wiring harnesses such as resistance, voltage, etc., and the wiring harness layout position is used to characterize the position of the high and low voltage wiring harnesses in the vehicle.

[0128] Step S2022, setting the excitation source corresponding to the high-voltage harness model based on the excitation source parameters, and setting the port circuit parameters corresponding to the high-voltage harness model and the low-voltage harness model respectively based on the harness electrical parameters, to obtain the target high-voltage harness model and the target low-voltage harness model.

[0129] Specifically, the port circuit is set in the simulation software, and the corresponding port circuit parameters are set according to different wiring harness ports, such as the port parameter of the twisted pair is 120 ohms. An excitation source is added to the high-voltage power harness end, and the excitation size can be set according to the battery pack voltage value used in the actual vehicle model.

[0130] Step S2023, based on the wiring harness layout position, the whole vehicle electromagnetic model, the target high voltage wiring harness model and the target low voltage wiring harness model are integrated and meshed to obtain a whole vehicle simulation model.

[0131] Specifically, the spatial position relationship of the wiring harness is first analyzed according to the wiring harness layout position, and the high and low voltage wiring harnesses and the whole vehicle electromagnetic model are integrated. Then, the target high voltage wiring harness model and the target low voltage wiring harness model of the established whole vehicle electromagnetic model are meshed in the simulation software. The meshing size can be selected as a standard size to obtain a whole vehicle simulation model.

[0132] This application analyzes the spatial position relationship of the wiring harness according to the wiring harness layout position, integrates, meshes, and sets the port circuit and excitation source parameters of the previously constructed whole vehicle electromagnetic model, high-voltage wiring harness model, and low-voltage wiring harness model to obtain a whole vehicle simulation model, thereby ensuring the integrity of the parameter setting and facilitating improving the accuracy of the simulation results.

[0133] Step S203, performing electromagnetic coupling simulation using the whole vehicle simulation model to obtain a low voltage harness coupling result under high voltage harness interference.

[0134] Specifically, the above step S203 includes:

[0135] Step S2031, determining the operating frequency range of the high-voltage wire harness, and obtaining the highest interference frequency of the high-voltage wire harness according to the operating frequency range.

[0136] Specifically, the integrated simulation model can be solved according to the solution algorithm to obtain the solution result of the low-voltage harness coupling value, and the solution frequency is set according to the boundary of the high- and low-voltage harness coupling model. The interference in the working frequency range of the high-voltage harness is mainly below 30Mhz, and the highest interference frequency of the high-voltage harness is 30Mhz, so the highest frequency range of the solution is set to 30Mhz.

[0137] Step S2032, using the whole vehicle simulation model to perform electromagnetic coupling simulation on the vehicle wiring harness, and obtain the coupling voltage / current value of each low-voltage wiring harness corresponding to the highest interference frequency.

[0138] Specifically, according to the highest interference frequency, the coupling voltage / current value coupled on the low-voltage harness within the solution frequency range is obtained to obtain the solution result. By setting the boundary solution frequency of the high-low voltage coupling model and performing the solution calculation through the high-low voltage harness coupling solution algorithm, the accuracy of the solution result calculation is guaranteed.

[0139] The present invention determines the highest interference frequency of the high-voltage wiring harness and uses a vehicle simulation model to solve the coupled voltage / current value coupled on the low-voltage wiring harness within the highest interference frequency. It has high accuracy and can quantify the interference of the high-voltage wiring harness on the low-voltage wiring harness, which is convenient for optimizing the high and low voltage wiring harnesses.

[0140] Step S204, based on the low-voltage harness coupling result, determine the low-voltage risk harness and the high-voltage interference harness corresponding to the low-voltage risk harness, and optimize the low-voltage risk harness and the high-voltage interference harness.

[0141] Specifically, the above step S204 includes:

[0142] Step S2041, determining whether the coupling voltage / current value of each low-voltage wiring harness is less than a preset voltage / current value.

[0143] Specifically, the coupling voltage / current value of the low-voltage wiring harness is compared with the preset voltage / current value, and the low-voltage risk wiring harness in the vehicle simulation model is determined according to the solution result of the low-voltage wiring harness.

[0144] Step S2042, for each low-voltage wiring harness, if the coupling voltage / current value of the current low-voltage wiring harness is not less than the preset voltage / current value, the current low-voltage wiring harness is determined to be a low-voltage risk wiring harness, and the high-voltage wiring harness whose wiring harness distance to the low-voltage risk wiring harness is less than the preset wiring harness distance is determined to be a high-voltage interference wiring harness.

[0145] Specifically, if the coupling voltage / current value of the low-voltage harness coupling is greater than or equal to the preset voltage / current value, it is judged that the low-voltage harness has a coupling risk; if the coupling voltage / current value of the low-voltage harness coupling is less than the preset voltage / current value, it is judged that the low-voltage harness does not have a coupling risk. Then, according to the harness distance between the low-voltage risk harness and other high-voltage harnesses, the high-voltage interference harness that causes the coupling risk of the low-voltage harness is screened out, and the high-voltage interference harness corresponding to the low-voltage risk harness is determined.

[0146] According to the above-mentioned technical means, the present application determines the abnormal harnesses existing in the current low-voltage harness arrangement by comparing the coupling voltage / current values ​​of the low-voltage harness coupling in the solution results with the preset voltage / current values ​​respectively. It can accurately find the low-voltage risk harness with coupling risk in the current arrangement position and the high-voltage interference harness that causes the coupling risk, so as to provide guidance for harness optimization.

[0147] Step S2043, optimizing the low-voltage risk harness and the high-voltage interference harness.

[0148] Specifically, the wiring harness layout position can be optimized by increasing the wiring harness distance between the low-voltage risk wiring harness and the high-voltage interference wiring harness, changing the shielding layer material of the low-voltage risk wiring harness and / or reducing the external radiation of the high-voltage interference wiring harness.

[0149] In some optional embodiments, the low-voltage risk harness area is optimized according to the coupling optimization method to obtain the state and position of the target low-voltage harness, wherein the coupling optimization method of the present invention includes: harness wiring position change processing: such as increasing the distance between the low-voltage harness and the high-voltage harness; line type category change processing: such as changing from an unshielded twisted pair to a shielded twisted pair; high-voltage component parameter change processing: increasing the optimization of the high-voltage component harness port filter parameters to reduce the external radiation value of the harness. Through the above measures, the coupling voltage / current value of the low-voltage harness is optimized. When the value is less than the preset voltage / current value, the state and position of the designed target low-voltage harness are obtained.

[0150] After determining the position of the low-voltage wiring harness with coupling risk, the embodiment of the present application can optimize the low-voltage risk wiring harness and the high-voltage interference wiring harness by various methods such as wiring harness routing position change processing, line type category change processing and high-voltage component parameter change processing, thereby effectively reducing the coupling risk between the high and low voltage wiring harnesses of the entire vehicle, thereby obtaining an ideally designed low-voltage wiring harness state, which is beneficial to ensuring the safe driving of the vehicle.

[0151] The optimization method of electromagnetic coupling of vehicle harness provided in this embodiment obtains the electromagnetic model of the whole vehicle through joint modeling of multiple softwares, obtains the three-dimensional model of the high-voltage harness of the electric drive and battery pack according to the core line coordinate file and the cross-sectional parameters of the high-voltage harness of the electric drive and battery pack, and obtains the three-dimensional model of the low-voltage harness of the chassis, instrument panel and front cabin according to the core line coordinate file and the cross-sectional parameters of the low-voltage harness of the chassis, instrument panel and front cabin. Then, the electromagnetic model of the whole vehicle, the high-voltage harness model of the whole vehicle and the low-voltage harness model are meshed, and the port circuit and excitation source parameters are set to obtain the simulation model of the whole vehicle. Then, the simulation model of the whole vehicle is solved according to the solution algorithm to obtain the solution result of the low-voltage harness coupling value, and the low-voltage risk harness in the high-low voltage coupling model is determined according to the solution result, and the low-voltage risk harness area is optimized according to the coupling optimization method to obtain the target low-voltage harness state and position, thereby effectively eliminating the low-voltage harness coupling risk area, ensuring the normal use of the low-voltage electrical appliances of the vehicle, and improving the safety of the vehicle.

[0152] The optimization scheme of electromagnetic coupling of vehicle wiring harness of the present invention is described in detail below in conjunction with a specific application embodiment.

[0153] like Figure 6 As shown, first of all, three models need to be established, including the whole vehicle electromagnetic model, the high-voltage wiring harness model and the low-voltage wiring harness model. The whole vehicle electromagnetic model, the high-voltage wiring harness model and the low-voltage wiring harness model are meshed, and the port circuit and excitation source parameters are set to obtain the simulation model. Secondly, the simulation model is solved to obtain the solution result of the low-voltage wiring harness coupling value, and the low-voltage risk wiring harness in the high-low voltage coupling model is determined. Finally, the low-voltage risk wiring harness area is optimized according to the coupling optimization method to obtain the target state and position of the low-voltage wiring harness, thereby ensuring the normal use of the vehicle's low-voltage electrical appliances and ensuring vehicle safety.

[0154] like Figure 7 As shown, the specific implementation steps of the above process are as follows:

[0155] Step S701, constructing a three-dimensional electromagnetic model of the whole vehicle through multi-software joint modeling.

[0156] Step S702, obtaining a three-dimensional model of the high-voltage wire harness of the electric drive and battery pack according to the core wire coordinate file and the cross-sectional parameters of the high-voltage wire harness of the electric drive and battery pack.

[0157] Step S703, obtaining the three-dimensional model of the chassis, instrument panel and front cabin low-voltage wire harness according to the core line coordinate file and the cross-sectional parameters of the low-voltage wire harness of the chassis, instrument panel and front cabin.

[0158] Step S704, meshing the whole vehicle three-dimensional electromagnetic model, the whole vehicle high-voltage harness model and the low-voltage harness model, and setting the port circuit and excitation source parameters to obtain a simulation model.

[0159] Step S705, solving the simulation model according to the solution algorithm to obtain the solution result of the low-voltage harness coupling value.

[0160] Step S706, determining the low-voltage risk harness in the high-low voltage coupling model according to the solution result.

[0161] For example, Figure 8 As shown, within the frequency range of 30MHz of the high-voltage harness, the coupling voltage of the instrument and chassis harness is solved. According to the solution results, the chassis coupling voltage value is large and fluctuates greatly. Therefore, it is determined that the chassis harness has a coupling risk. The chassis harness can be optimized by changing the wiring position of the harness, changing the line type, and changing the parameters of the high-voltage components to eliminate the coupling risk of the chassis harness, thereby ensuring the normal use of the chassis.

[0162] Step S707, optimizing the low-voltage risk harness area according to the coupling optimization method to obtain the target low-voltage harness state and position.

[0163] Specifically, this application example also provides a vehicle high and low voltage wiring harness electromagnetic coupling simulation analysis system, such as Fig. 9 As shown, the system includes:

[0164] The vehicle model multi-software construction module is used to build a three-dimensional electromagnetic model of the vehicle through multi-software joint modeling;

[0165] The vehicle electric drive and battery pack high-voltage wiring harness model construction module is used to obtain the line type and core wire position parameters of the vehicle high-voltage wiring harness and construct the vehicle high-voltage wiring harness model;

[0166] The vehicle chassis, instrument panel, and front cabin low-voltage wiring harness model building module is used to obtain the line type and core line position parameters of the vehicle chassis, instrument panel, and front cabin low-voltage wiring harness to build the vehicle low-voltage wiring harness model;

[0167] The solution result simulation calculation and analysis module is used to perform meshing, port current and excitation parameter setting on the vehicle high-voltage wiring harness model and the vehicle low-voltage wiring harness model to obtain a simulation model; the simulation model is solved according to the solution algorithm to obtain a solution result;

[0168] The coupling risk optimization module is used to determine the coupling risk harness in the simulation model according to the simulation solution results, and optimize the coupling risk harness according to the high-low voltage coupling optimization method to obtain the target low-voltage harness state and position.

[0169] This application example solves the design problem of electromagnetic coupling risk resistance of low-voltage wiring harness system in the vehicle. At the same time, it solves the problem that the existing design cannot calculate the size of the high-voltage signal value that is interfered by the high-voltage coupling of a specific low-voltage wiring harness in the vehicle, and cannot guide the selection and design of the low-voltage wiring harness and analyze the electromagnetic coupling risk caused by the different layout positions of the high and low voltage wiring harnesses in the vehicle.

[0170] In this embodiment, a device for optimizing electromagnetic coupling of vehicle wiring harness is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and will not be repeated hereafter. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0171] This embodiment provides an optimization device for electromagnetic coupling of vehicle wiring harnesses, such as Fig.10 As shown, including:

[0172] The first processing module 1001 is used to construct a vehicle electromagnetic model, a high-voltage wiring harness model and a low-voltage wiring harness model based on the vehicle structure parameters;

[0173] The second processing module 1002 is used to couple the vehicle electromagnetic model, the high-voltage wiring harness model and the low-voltage wiring harness model based on the vehicle structural parameters to obtain a vehicle simulation model;

[0174] The third processing module 1003 is used to perform electromagnetic coupling simulation using the whole vehicle simulation model to obtain the low voltage harness coupling result under the interference of the high voltage harness;

[0175] The fourth processing module 1004 is used to determine the low-voltage risk harness and the high-voltage interference harness corresponding to the low-voltage risk harness based on the low-voltage harness coupling result, and optimize the low-voltage risk harness and the high-voltage interference harness.

[0176] In some optional implementations, the first processing module 1001 is further used for:

[0177] Based on the vehicle structure parameters, the physical model of each metal component of the vehicle and the wiring harness structure parameters corresponding to the high-voltage wiring harness and the low-voltage wiring harness are obtained; wherein the wiring harness structure parameters include core line coordinate data and wiring harness cross-section parameters;

[0178] Extract the node coordinate data in the physical model of each metal part of the vehicle, reconstruct the model according to the node coordinate data, and obtain the electromagnetic model of the vehicle;

[0179] Models are constructed according to the wiring harness structural parameters corresponding to the high-voltage wiring harness and the low-voltage wiring harness, respectively, to obtain a high-voltage wiring harness model and a low-voltage wiring harness model.

[0180] In some optional implementations, the first processing module 1001 is further used for:

[0181] The physical model of each metal part of the vehicle is divided into multiple grid units, and the multiple grid units are subjected to geometric feature filtering and edge processing to obtain multiple target grid units;

[0182] According to the node information corresponding to each target grid unit, the node coordinate data is obtained.

[0183] In some optional implementations, the first processing module 1001 is further used for:

[0184] Based on the core line coordinate data corresponding to the high-voltage wiring harness and the low-voltage wiring harness, respectively, the central core line path models corresponding to the high-voltage wiring harness and the low-voltage wiring harness are constructed; the high-voltage wiring harness includes at least one of the electric drive wiring harness and the battery pack wiring harness, and the low-voltage wiring harness includes at least one of the chassis wiring harness, the instrument panel wiring harness and the front cabin wiring harness;

[0185] Based on the wire harness cross-section parameters corresponding to the high-voltage wire harness, parameters of the central core wire path model corresponding to the high-voltage wire harness are set to obtain a high-voltage wire harness model; wherein the wire harness cross-section parameters include at least one of a wire harness diameter, a wire harness type, and a wire harness shielding information;

[0186] Based on the wire harness cross-section parameters corresponding to the low-voltage wire harness, parameters of the center core wire path model corresponding to the low-voltage wire harness are set to obtain a low-voltage wire harness model.

[0187] In some optional implementations, the second processing module 1002 is further configured to:

[0188] According to the vehicle structure parameters, the excitation source parameters, wiring harness electrical parameters and wiring harness layout position are obtained;

[0189] An excitation source corresponding to the high-voltage wiring harness model is set based on the excitation source parameters, and port circuit parameters corresponding to the high-voltage wiring harness model and the low-voltage wiring harness model are set based on the wiring harness electrical parameters to obtain a target high-voltage wiring harness model and a target low-voltage wiring harness model;

[0190] Based on the wiring harness layout position, the vehicle electromagnetic model, target high-voltage wiring harness model and target low-voltage wiring harness model are integrated and meshed to obtain a vehicle simulation model.

[0191] In some optional implementations, the third processing module 1003 is further configured to:

[0192] Determine the operating frequency range of the high-voltage wiring harness, and obtain the highest interference frequency of the high-voltage wiring harness based on the operating frequency range;

[0193] The vehicle wiring harness is simulated by electromagnetic coupling using the whole vehicle simulation model to obtain the coupling voltage / current value of each low-voltage wiring harness corresponding to the highest interference frequency.

[0194] In some optional implementations, the fourth processing module 1004 is further configured to:

[0195] Determine whether the coupling voltage / current value of each low-voltage wiring harness is less than a preset voltage / current value;

[0196] For each low-voltage wiring harness, if the coupling voltage / current value of the current low-voltage wiring harness is not less than the preset voltage / current value, the current low-voltage wiring harness is determined to be a low-voltage risk wiring harness, and the high-voltage wiring harness whose wiring harness distance to the low-voltage risk wiring harness is less than the preset wiring harness distance is determined to be a high-voltage interference wiring harness.

[0197] In some optional implementations, the fourth processing module 1004 is further configured to:

[0198] Increase the harness distance between the low-voltage risk harness and the high-voltage interference harness;

[0199] and / or, change the shielding material of low voltage risk harnesses;

[0200] And / or, reduce the external radiation of high-voltage interference wiring harness.

[0201] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0202] The vehicle wiring harness electromagnetic coupling optimization device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0203] The embodiment of the present invention also provides a computer device having the above Fig.10 The optimized device for electromagnetic coupling of vehicle wiring harness is shown.

[0204] See also Fig.11 , Fig.11 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Fig.11As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Fig.11 A processor 10 is taken as an example.

[0205] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0206] The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0207] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0208] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0209] The computer device also includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 40 may be connected via a bus or other means. Fig.11 The example of connecting through bus is taken in the following.

[0210] The input device 30 can receive input digital or character information, and generate key signal input related to the user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator bar, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 may include a display device, an auxiliary lighting device (e.g., an LED) and a tactile feedback device (e.g., a vibration motor), etc. The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0211] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0212] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0213] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for optimizing electromagnetic coupling of vehicle wiring harness, characterized in that: The method comprises: Based on the vehicle structure parameters, the vehicle electromagnetic model, high-voltage wiring harness model and low-voltage wiring harness model are constructed; Based on the vehicle structure parameters, coupling processing is performed on the vehicle electromagnetic model, the high-voltage wiring harness model and the low-voltage wiring harness model to obtain a vehicle simulation model; Using the whole vehicle simulation model to perform electromagnetic coupling simulation, obtain the low voltage harness coupling result under the interference of the high voltage harness; Based on the low-voltage harness coupling result, a low-voltage risk harness and a high-voltage interference harness corresponding to the low-voltage risk harness are determined, and the low-voltage risk harness and the high-voltage interference harness are optimized.

2. The method according to claim 1, characterized in that: The coupling process of the whole vehicle electromagnetic model, the high voltage wiring harness model and the low voltage wiring harness model based on the whole vehicle structural parameters to obtain a whole vehicle simulation model includes: According to the vehicle structure parameters, the excitation source parameters, the wiring harness electrical parameters and the wiring harness layout position are obtained; The excitation source corresponding to the high-voltage wiring harness model is set based on the excitation source parameter, and the port circuit parameters corresponding to the high-voltage wiring harness model and the low-voltage wiring harness model are set based on the wiring harness electrical parameters to obtain a target high-voltage wiring harness model and a target low-voltage wiring harness model; Based on the wiring harness layout position, the whole vehicle electromagnetic model, the target high voltage wiring harness model and the target low voltage wiring harness model are integrated and meshed to obtain a whole vehicle simulation model.

3. The method according to claim 2, characterized in that The electromagnetic coupling simulation is performed using the whole vehicle simulation model to obtain the low voltage harness coupling result under the interference of the high voltage harness, including: Determine the operating frequency range of the high-voltage wire harness, and obtain the highest interference frequency of the high-voltage wire harness according to the operating frequency range; The whole vehicle simulation model is used to perform electromagnetic coupling simulation on the vehicle wiring harness to obtain the coupling voltage / current value of each low-voltage wiring harness corresponding to the highest interference frequency.

4. The method according to claim 3, characterized in that The determining, based on the low-voltage wiring harness coupling result, a low-voltage risk wiring harness and a high-voltage interference wiring harness corresponding to the low-voltage risk wiring harness comprises: Determine whether the coupling voltage / current value of each low-voltage wiring harness is less than a preset voltage / current value; For each low-voltage wiring harness, if the coupling voltage / current value of the current low-voltage wiring harness is not less than the preset voltage / current value, the current low-voltage wiring harness is determined to be a low-voltage risk wiring harness, and the high-voltage wiring harness whose wiring harness distance to the low-voltage risk wiring harness is less than the preset wiring harness distance is determined to be a high-voltage interference wiring harness.

5. The method according to claim 2, characterized in that: The optimizing of the low-voltage risk harness and the high-voltage interference harness comprises: Increasing the harness distance between the low-voltage risk harness and the high-voltage interference harness; and / or, changing the shielding material of the low voltage risk harness; And / or, reducing the external radiation of the high-voltage interference harness.

6. The method according to any one of claims 1 to 5, characterized in that The method of constructing a vehicle electromagnetic model, a high-voltage wiring harness model and a low-voltage wiring harness model based on the vehicle structural parameters includes: Based on the vehicle structure parameters, the physical model of each metal component of the vehicle, the wiring harness structure parameters corresponding to the high-voltage wiring harness and the low-voltage wiring harness are obtained; wherein the wiring harness structure parameters include core line coordinate data and wiring harness cross-section parameters; Extracting node coordinate data from the physical model of each metal component of the vehicle, reconstructing the model according to the node coordinate data, and obtaining an electromagnetic model of the vehicle; Models are constructed according to the wiring harness structural parameters corresponding to the high-voltage wiring harness and the low-voltage wiring harness, respectively, to obtain a high-voltage wiring harness model and a low-voltage wiring harness model.

7. The method according to claim 6, characterized in that The step of extracting node coordinate data from the physical model of each metal component of the vehicle includes: Dividing the physical model of each metal part of the vehicle into a plurality of grid units, and performing geometric feature filtering and edge processing on the plurality of grid units to obtain a plurality of target grid units; Node coordinate data is obtained according to the node information corresponding to each target grid unit.

8. The method according to claim 7, characterized in that The model is constructed according to the wiring harness structural parameters corresponding to the high-voltage wiring harness and the low-voltage wiring harness respectively, to obtain the high-voltage wiring harness model and the low-voltage wiring harness model, including: Based on the core line coordinate data corresponding to the high-voltage wiring harness and the low-voltage wiring harness, respectively, the central core line path models corresponding to the high-voltage wiring harness and the low-voltage wiring harness are constructed; the high-voltage wiring harness includes at least one of the electric drive wiring harness and the battery pack wiring harness, and the low-voltage wiring harness includes at least one of the chassis wiring harness, the instrument panel wiring harness and the front cabin wiring harness; Based on the wire harness cross-section parameters corresponding to the high-voltage wire harness, parameters of the central core wire path model corresponding to the high-voltage wire harness are set to obtain a high-voltage wire harness model; wherein the wire harness cross-section parameters include at least one of a wire harness diameter, a wire harness type, and a wire harness shielding information; Based on the wire harness cross-section parameters corresponding to the low-voltage wire harness, parameters of the center core wire path model corresponding to the low-voltage wire harness are set to obtain a low-voltage wire harness model.

9. An optimization device for electromagnetic coupling of vehicle wiring harness, characterized in that: The device comprises: The first processing module is used to construct a vehicle electromagnetic model, a high-voltage wiring harness model and a low-voltage wiring harness model based on the vehicle structure parameters; A second processing module is used to couple the vehicle electromagnetic model, the high-voltage wiring harness model and the low-voltage wiring harness model based on the vehicle structure parameters to obtain a vehicle simulation model; A third processing module is used to perform electromagnetic coupling simulation using the whole vehicle simulation model to obtain a low-voltage wire harness coupling result under high-voltage wire harness interference; The fourth processing module is used to determine the low-voltage risk harness and the high-voltage interference harness corresponding to the low-voltage risk harness based on the low-voltage harness coupling result, and optimize the low-voltage risk harness and the high-voltage interference harness.

10. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the vehicle wiring harness electromagnetic coupling optimization method according to any one of claims 1 to 8 by executing the computer instructions.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method for optimizing electromagnetic coupling of a vehicle wiring harness according to any one of claims 1 to 8.

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