Vehicle anti-interference capability assessment method and device and computer storage medium
By building vehicle models in the target simulation software and performing simulation evaluation, the high-cost anti-interference ability evaluation problem in traditional methods is solved, early risk prediction and optimization are achieved, rectification costs are reduced, and evaluation efficiency is improved.
Patent Information
- Application Number
- CN202510422200.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2025-08-29
Smart Images
Figure CN120562034A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the automotive field, and in particular to a method, device, and computer storage medium for evaluating vehicle anti-interference capability. Background Art
[0002] In modern transportation systems, the widespread use of automotive electronics has made vehicles increasingly dependent on the stable transmission of various electronic signals during driving. However, external interference factors such as electromagnetic interference and radio frequency interference can seriously affect the vehicle's electronic systems, causing instability in key functions such as navigation, onboard communications, braking, and powertrain systems, thereby affecting driving safety and the driving experience. To mitigate these effects, vehicles need to have a certain degree of anti-interference capability.
[0003] A vehicle's anti-interference capability is a key indicator for measuring the stable operation of its electrical system in complex electromagnetic environments, directly impacting the safety, reliability, and user experience of the entire vehicle. In traditional development processes, anti-interference capability assessment typically requires waiting until the prototype vehicle is finalized. If insufficient anti-interference capability is discovered during prototype testing, significant design revisions are often necessary, which is not only time-consuming and labor-intensive, but also significantly increases R&D costs.
[0004] Therefore, the traditional method of evaluating anti-interference capabilities after prototype production is not only costly but also fails to meet the modern automotive industry's demands for efficient development and rapid iteration. To address this issue, a technical solution is urgently needed that can evaluate the anti-interference capabilities of the entire vehicle at the early design stage. Summary of the Invention
[0005] To solve the above technical problems, the present application proposes a vehicle anti-interference capability evaluation method, device and computer storage medium.
[0006] To solve the above technical problems, this application proposes a vehicle anti-interference capability evaluation method, which includes:
[0007] Construct the vehicle body structure model and cable structure model corresponding to the target vehicle;
[0008] Import the vehicle body structure model and cable structure model into the target site model in the target simulation software to obtain the vehicle immunity simulation model;
[0009] Calculate the vehicle immunity simulation model to obtain simulation data, and determine the anti-interference ability evaluation result of the target vehicle based on the simulation data;
[0010] Among them, the target site model is constructed by the anti-interference antenna model and the environmental simulation model. The anti-interference antenna model is used to simulate electromagnetic interference other than the target vehicle, and the environmental simulation model is used to simulate the physical environment for testing the anti-interference ability of the vehicle.
[0011] Before importing the vehicle structure model and the cable structure model into the target site model in the target simulation software, the method further includes:
[0012] Import each antenna in the antenna model into the corresponding preset position in the environmental simulation model to obtain an initial site model;
[0013] Perform field calibration and uniformity verification on the initial site model to obtain field calibration data and field uniformity data;
[0014] The initial site model is adjusted according to the field calibration data and field uniformity data to obtain the target site model.
[0015] Before constructing the vehicle body structure model and the cable structure model corresponding to the target vehicle, the method further includes:
[0016] Obtain the vehicle digital model file corresponding to the vehicle structure of the target vehicle;
[0017] Remove the data of the target module in the vehicle digital model file to obtain the vehicle body digital model file, where the target module is a module in the vehicle structure that has no relevance to radiation immunity;
[0018] Convert the data format of the vehicle body digital model file into a data format supported by the target simulation software to obtain the vehicle body structure file;
[0019] Modeling is performed according to the vehicle body structure file to obtain a vehicle body structure model.
[0020] Before constructing the vehicle body structure model and the cable structure model corresponding to the target vehicle, the method further includes:
[0021] Obtaining wiring harness routing information arranged in the target vehicle, wherein the wiring harness routing information includes at least the wiring harness entry position, exit position, and key point positions of the transmission path;
[0022] Generate a three-dimensional curve based on the wiring harness direction information;
[0023] Create a cable structure model in the target simulation software based on the 3D curve.
[0024] The vehicle immunity simulation model is calculated to obtain simulation data, including:
[0025] Apply disturbances to the target site model in the vehicle immunity simulation model;
[0026] In response to the disturbance, simulation data at the target position is acquired, wherein the simulation data includes at least current data, voltage data, and electromagnetic field data.
[0027] Before applying the disturbance to the target site model in the vehicle immunity simulation model, the method further includes:
[0028] Obtaining an evaluation requirement, wherein the evaluation requirement is used to indicate an anti-interference capability of a target part in a target vehicle;
[0029] A target probe is set at a target position corresponding to a target part in the vehicle immunity simulation model to collect simulation data at the target position using the target probe.
[0030] The anti-interference capability evaluation result of the target vehicle is determined based on the simulation data, including:
[0031] Determine the noise intensity and risk frequency band at the target location based on the simulation data, where the risk frequency band is the problematic frequency range that causes interference to the target vehicle;
[0032] The anti-interference capability evaluation result of the target vehicle is determined based on the noise intensity and risk frequency band.
[0033] Among them, the anti-interference ability evaluation results of the target vehicle are determined based on the noise intensity and risk frequency band, including:
[0034] If the noise intensity is greater than a preset intensity threshold, determining that the anti-interference capability evaluation result is unqualified; and / or,
[0035] In the case where there is an overlap between the risk frequency band and the preset frequency range, the anti-interference capability assessment result is determined to be unqualified, wherein the preset frequency range is the range standard of the vehicle's operating frequency.
[0036] In order to solve the above technical problems, the present application also proposes a vehicle anti-interference capability evaluation device, which includes a memory and a processor coupled to the memory; wherein the memory is used to store computer programs, and the processor is used to execute the computer programs to implement the vehicle anti-interference capability evaluation method as described above.
[0037] In order to solve the above technical problems, the present application also proposes a computer storage medium, which is used to store a computer program. When the computer program is executed by a computer, it is used to implement the above-mentioned vehicle anti-interference capability evaluation method.
[0038] Compared with the prior art, the beneficial effects of the present application are: by importing the body structure model and cable structure model of the target vehicle into the target site model in the target simulation software, a whole vehicle immunity simulation model is obtained, the whole vehicle immunity simulation model is calculated to obtain simulation data, and the anti-interference capability evaluation result of the target vehicle is determined based on the simulation data. The anti-interference capability evaluation of the target vehicle can be completed in the automobile development and design stage through simulation, and the possible anti-interference risk problems of the designed target vehicle can be predicted in advance, so as to optimize and improve the anti-interference weak points in the vehicle in a targeted manner without waiting for the production of the prototype vehicle. Even if the anti-interference capability is found to be insufficient, only the simulation model needs to be adjusted, which avoids changes to the physical prototype vehicle, significantly reduces the rectification cost, and effectively solves the high cost problem caused by the need to conduct anti-interference capability evaluation after the prototype vehicle is produced in the traditional method.
[0039] In addition, the target simulation software integrates a target site model consisting of an anti-interference antenna model and an environmental simulation model. When applying simulation, vehicles of different models can directly call the target site model in the target simulation software without the need to remodel the environment. The target site model is highly reusable, which greatly improves the efficiency of anti-interference capability evaluation. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0041] in:
[0042] Figure 1 This is a flow chart of an embodiment of a method for evaluating vehicle anti-interference capability provided by the present application;
[0043] Figure 2 is a schematic diagram of a target site model provided in one embodiment of the present application;
[0044] Figure 3 1 is a flow chart of a method for evaluating vehicle anti-interference capability provided by another embodiment of the present application;
[0045] Figure 4 This is a structural diagram of an embodiment of a vehicle anti-interference capability evaluation device provided by the present application;
[0046] Figure 5 This is a structural diagram of an embodiment of a vehicle anti-interference capability evaluation device provided by the present application;
[0047] Figure 6It is a structural diagram of an embodiment of a computer storage medium provided by this application. DETAILED DESCRIPTION
[0048] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0049] The terms "first," "second," "third," "fourth," etc. (if any) in the specification and claims of the present application and in the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential sequence. It should be understood that the numbers used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or apparatus.
[0050] See also Figure 1 , Figure 1 This is a flow chart of an embodiment of a method for evaluating vehicle anti-interference capability provided by the present application.
[0051] The vehicle anti-interference capability evaluation method of the present application is applied to a vehicle anti-interference capability evaluation device, wherein the vehicle anti-interference capability evaluation device of the present application can be a server, a terminal device, or a system composed of a server and a terminal device. Accordingly, the various parts of the vehicle anti-interference capability evaluation device, such as the various units, subunits, modules, and submodules, can all be set in the server, all be set in the terminal device, or be set separately in the server and the terminal device.
[0052] Furthermore, the server described above may be either hardware or software. When the server is hardware, it may be implemented as a distributed server cluster consisting of multiple servers, or as a single server. When the server is software, it may be implemented as multiple software programs or software modules, such as software or software modules for providing a distributed server, or as a single software program or software module, without further limitation.
[0053] like Figure 1As shown, the vehicle anti-interference capability evaluation method provided in this embodiment has the following specific steps:
[0054] Step S11: constructing a vehicle body structure model and a cable structure model corresponding to the target vehicle.
[0055] In the embodiment of the present application, the body structure refers to the structure that constitutes the vehicle shell and core load-bearing parts, including the vehicle frame, shell structure, etc. The body structure model refers to a virtual model established in a computer environment, which is used to represent the body structure characteristics of the target vehicle, including the three-dimensional geometric shape representing the vehicle structure, the physical properties of the material, and the mesh division data.
[0056] Before building a vehicle structure model, it is necessary to model the body structure of the target vehicle, specifically including: obtaining the whole vehicle digital model file corresponding to the whole vehicle structure of the target vehicle; removing the data of the target module in the whole vehicle digital model file to obtain the body digital model file, wherein the target module is a module in the whole vehicle structure that has no correlation with radiation immunity; converting the data format of the body digital model file into a data format supported by the target simulation software to obtain the body structure file; modeling according to the body structure file to obtain the body structure model.
[0057] Among them, when designing a car, the detailed data of each part of the vehicle is usually represented by a whole vehicle digital model file. The whole vehicle digital model file can be used for anti-interference capability evaluation, but the whole vehicle digital model file includes all modules of the target vehicle, some of which have no effect on the radiation immunity of the target vehicle. The setting of these modules in the target vehicle will not change the anti-interference capability of the target vehicle. These modules are recorded as target modules, that is, modules in the whole vehicle structure that have no correlation with radiation immunity. The target modules mainly refer to some non-metallic parts in the overall vehicle, such as body trims, glue, etc.
[0058] Since the target module has almost no effect on the anti-interference performance of the target vehicle, the data of the target module in the whole vehicle digital model file is removed during the anti-interference evaluation simulation process to streamline the target module in the whole vehicle structure and obtain the body digital model file. The body structure model obtained according to the body digital model file can only focus on the impact of external interference on the metal body of the target vehicle during the subsequent simulation operation anti-interference capability evaluation.
[0059] It should be noted that the format of the digital model file is not necessarily the same as the format of the target simulation software. Therefore, it is necessary to convert the data format of the vehicle body digital model file into a vehicle body structure file supported by the target simulation software, and then modeling is performed based on the vehicle body structure file to obtain the vehicle body structure model.
[0060] For example, when the design software CATIA creates a car body digital model file, it is typically stored in the ".CATPart (part file)" or ".CATProduct (assembly file)" format. The target simulation software is the electromagnetic field simulation software CST StudioSuite, which supports multiple common CAD formats (such as STEP, IGES, STL, etc.). Therefore, the car body digital model file needs to be converted from the CATIA file format to a format supported by CST.
[0061] A cable structure refers to a combination of cables consisting of multiple conductors (metal wires) and insulating materials in a vehicle. In a target vehicle, the cables in the cable structure connect various electrical systems and components to achieve power or signal transmission in the target vehicle.
[0062] Because the cable module in the vehicle digital model file only represents the outline structure of the wire harness and cannot describe the precise geometric and electrical properties of the cable, the cable structure in the target vehicle is modeled separately. Specifically, this cable structure modeling involves obtaining the wiring harness routing information within the target vehicle, which includes at least the wiring harness entry and exit locations, as well as key points along the transmission path; generating a three-dimensional curve based on the wiring harness routing information; and creating a cable structure model based on the three-dimensional curve.
[0063] Among them, a three-dimensional curve can be created based on the wiring position and path of the cables in the target vehicle (i.e., the wiring harness direction information), which can accurately simulate the precise direction of the cables as much as possible and model the layout of the wiring harness on the target vehicle. During modeling, the number of cables, line type, size and corresponding electrical parameters can also be specified according to the actual wiring harness characteristics.
[0064] Step S12: Importing the vehicle body structure model and the cable structure model into the target site model in the target simulation software to obtain a whole vehicle immunity simulation model.
[0065] Among them, the target site model is constructed by the anti-interference antenna model and the environmental simulation model. The anti-interference antenna model is used to simulate electromagnetic interference other than the target vehicle, and the environmental simulation model is used to simulate the physical environment for testing the anti-interference ability of the vehicle.
[0066] In an embodiment of the present application, a simulation is performed in target simulation software to obtain an anti-interference capability evaluation result of a target vehicle. A target site model is integrated in the target simulation software. The target site model refers to a three-dimensional model used to simulate a specific environment. When estimating the anti-interference capability of a vehicle, the target site model is used to simulate the semi-anechoic chamber environment in which the anti-interference test is performed in reality, including the physical environment and the electromagnetic environment.
[0067] Since the target site model is integrated in the target simulation software, when simulating the application of vehicles of different models, the target site model in the target simulation software can be directly called for simulation without the need to remodel the environment.
[0068] The target site model includes an anti-interference antenna model that simulates electromagnetic interference from sources other than the target vehicle, and an environmental simulation model that simulates the physical environment. The environmental simulation model simulates a semi-anechoic chamber (excluding antennas that cause electromagnetic interference). The floor of the environmental simulation model is made of a metal steel plate, with open boundaries in all other directions. The turntable position for the vehicle is also calibrated.
[0069] The anti-interference antenna model is obtained by modeling an antenna that generates a radiated electromagnetic field. It is used to simulate electromagnetic interference other than the target vehicle. For example, two log-periodic antennas of different sizes are used to generate interference electromagnetic fields in the 20MHz-220MHz and 220MHz-2000MHz frequency bands. When simulating different frequency bands, you can simply import or replace the corresponding antenna.
[0070] In an optional embodiment, before importing the vehicle body structure model and the cable structure model into the target site model in the target simulation software, the target site model is integrated into the target simulation software through the following steps: each antenna in the anti-interference antenna model is imported into the corresponding preset position in the environmental simulation model to obtain an initial site model; the initial site model is subjected to field calibration and uniformity verification to obtain field calibration data and field uniformity data; the initial site model is adjusted according to the field calibration data and field uniformity data to obtain a target site model.
[0071] After the anti-interference antenna model and the environmental simulation model are imported into the target simulation software, an initial site model is obtained. In order to make the initial site model meet the standard requirements, the initial site model is calibrated and uniformity verified. Field calibration is performed in the simulation environment without a vehicle. The field calibration adopts the four-point averaging method. For example, four probes are placed on the vertical reference line at heights of 0.5m, 0.8m, 1m and 1.2m from the metal floor. First, a power is applied to the anti-interference antenna model, and the average value of the corresponding four probe field strengths is obtained by combining field and circuit simulation. Then, according to the field strength calibration formula, the frequency-power calibration curve (i.e., field calibration data) within the frequency band of interest is calculated. The initial site model is adjusted according to the field calibration data so that the field strength at each probe setting point reaches the expected value. The power data in the frequency-power calibration curve is the transmission power loaded on the anti-interference antenna during the vehicle anti-interference simulation.
[0072] In the interference of frequency bands above 200MHz, simulation is used to calculate the field strength data at a position 0.5m on both sides of each probe setting point, and the data is processed and calculated to obtain the frequency domain field strength comparison curve (i.e., uniformity data). The uniformity data is compared with the field strength variation range required by the standard to determine whether the uniformity requirements are met. If the uniformity requirements are not met, the initial site model is adjusted according to the uniformity data to meet the uniformity requirements.
[0073] When evaluating the anti-interference capability of a target vehicle, it is only necessary to construct the vehicle body structure model and cable structure model corresponding to the target vehicle and import them into the target site model integrated in the target simulation software to obtain the whole vehicle immunity simulation model. Simulation can then be performed without having to model the target site model again, which greatly reduces the modeling difficulty of the simulation model. The target site model is highly reusable, greatly improving the efficiency of anti-interference capability evaluation.
[0074] See also Figure 2 , Figure 2 is a schematic diagram of a target site model provided in an embodiment of the present application, such as Figure 2 As shown, the rectangular body is the environment simulation model (the bottom is the metal floor, and the other five faces are open boundaries). The vehicle structure model will be imported into the preset position in the environment simulation model (the corresponding position of the car placement module). Figure 2 The anti-interference antenna model shown in the figure simulates electromagnetic interference other than the target vehicle. The cable structure model of the target vehicle can be represented by a transmission line matrix. Figure 2 Not shown in the figure, the body structure model and cable structure model of the target vehicle are imported into the target site model in the target simulation software to obtain the whole vehicle immunity simulation model.
[0075] Step S13: Calculate the whole vehicle immunity simulation model to obtain simulation data, and determine the anti-interference capability evaluation result of the target vehicle based on the simulation data.
[0076] In an embodiment of the present application, after the whole vehicle immunity simulation model is created, the whole vehicle immunity simulation model is calculated in the target simulation software, and the obtained simulation data can be used to determine the anti-interference ability evaluation result of the target vehicle.
[0077] In the present application, by importing the body structure model and cable structure model of the target vehicle into the target site model in the target simulation software, a whole vehicle immunity simulation model is obtained, the whole vehicle immunity simulation model is calculated to obtain simulation data, and the anti-interference capability evaluation result of the target vehicle is determined based on the simulation data. The anti-interference capability evaluation of the target vehicle can be completed in the automobile development and design stage through simulation, and the possible anti-interference risk problems of the designed target vehicle can be predicted in advance, and the anti-interference weak points in the vehicle can be optimized and improved in a targeted manner without waiting for the production of the prototype vehicle. Even if the anti-interference capability is found to be insufficient, only the simulation model needs to be adjusted, which avoids changes to the physical prototype vehicle, significantly reduces the rectification cost, and effectively solves the high cost problem caused by the need to conduct anti-interference capability evaluation after the prototype vehicle is produced in the traditional method.
[0078] In addition, the target site model, including the anti-interference antenna model and the environmental simulation model, is integrated into the target simulation software. When applying simulation, vehicles of different models can directly call the target site model in the target simulation software for simulation without the need to remodel the environment. The target site model is highly reusable, which greatly improves the efficiency of anti-interference capability evaluation.
[0079] See also Figure 3 , Figure 3 FIG. 1 is a flow chart of a method for evaluating vehicle anti-interference capability provided by another embodiment of the present application. Figure 3 As shown, including:
[0080] Step S301: performing anti-interference antenna modeling to obtain an anti-interference antenna model.
[0081] Step S302: Build a simulation environment to obtain a simulation environment model.
[0082] Step S303: Perform field calibration and field uniformity verification on the anti-interference antenna model and the simulation environment model.
[0083] Step S304: Determine whether the field calibration and uniformity verification meet the standard requirements. If they meet the standard requirements, execute step S309; if they do not meet the standard requirements, execute step S301.
[0084] Step S305: Preprocess the vehicle digital model file to obtain a vehicle body structure model.
[0085] Step S306: Import the vehicle body structure model into the target simulation software, and then execute step S309.
[0086] Step S307: Modeling the cable structure of the target vehicle to obtain a cable structure model.
[0087] Step S308: Import the cable structure model into the target simulation software, and then execute step S309.
[0088] Step S309: integrating and obtaining a vehicle immunity simulation model.
[0089] Step S310: Setting a probe at a target position in the vehicle immunity simulation model.
[0090] Step S311: performing simulation calculation on the vehicle immunity simulation model to obtain simulation data.
[0091] Step S312: Process and analyze the simulation data to obtain an anti-interference capability evaluation result.
[0092] It should be noted that there is no strict execution order among step S301 , step S302 , step S305 and step S307 .
[0093] In an optional embodiment, the whole vehicle immunity simulation model is calculated to obtain simulation data, including: applying disturbance to the target site model in the whole vehicle immunity simulation model; in response to the disturbance, obtaining simulation data at the target position, wherein the simulation data includes at least current data, voltage data and electromagnetic field data.
[0094] In an embodiment of the present application, during simulation, a disturbance is applied, where the disturbance is an electromagnetic interference that simulates the impact of an external electromagnetic source on the electromagnetic environment of the entire vehicle. The intensity, frequency, and waveform of the disturbance are preset to reflect the electromagnetic interference that may occur in the real world. However, after the disturbance is applied, the vehicle immunity simulation model will perform a predictive response through an internal algorithm, obtain data output, and obtain simulation data. The simulation data includes at least current data, voltage data, and electromagnetic field data. Based on the simulation data, the anti-interference capability evaluation result of the target vehicle can be determined, that is, whether the vehicle meets the design standards under a specific electromagnetic environment can be verified.
[0095] In an optional embodiment, before applying disturbance to the target site model in the whole vehicle immunity simulation model, the above method also includes: obtaining evaluation requirements, wherein the evaluation requirements are used to represent the anti-interference ability of the target part in the target vehicle; setting a target probe at the target position corresponding to the target part in the whole vehicle immunity simulation model to use the target probe to collect simulation data at the target position.
[0096] In an embodiment of the present application, before executing the simulation model, it is necessary to clarify the evaluation requirements so that the subsequent simulation process is highly targeted and obtains effective simulation data. Obtaining the evaluation requirements is to determine the specific parts of the target vehicle to be evaluated, for example, to evaluate the anti-interference capability of the vehicle's electronic control unit (ECU). The evaluation requirements can be preset requirements or automatically generated requirements.
[0097] After determining the target part to be evaluated, a target probe is set at the target position corresponding to the target part to collect simulation data of the target position in real time. The setting of the target probe can improve the accuracy of data collection and thus improve the evaluation results of anti-interference ability.
[0098] In an optional embodiment, the anti-interference capability evaluation result of the target vehicle is determined based on the simulation data, including: determining the noise intensity and risk frequency band of the target position based on the simulation data, wherein the risk frequency band is the problem frequency range that causes interference to the target vehicle; and determining the anti-interference capability evaluation result of the target vehicle based on the noise intensity and the risk frequency band.
[0099] In an optional embodiment, the anti-interference capability evaluation result of the target vehicle is determined based on the noise intensity and the risk frequency band, including: when the noise intensity is greater than a preset intensity threshold, determining that the anti-interference capability evaluation result is unqualified; and / or, when there is an overlapping part between the risk frequency band and the preset frequency range, determining that the anti-interference capability evaluation result is unqualified, wherein the preset frequency range is the range standard of the vehicle's operating frequency.
[0100] In the embodiment of the present application, noise intensity refers to how many interference signals may affect the normal operation of the target vehicle at the target position. The risk frequency band is a frequency range. The noise within this frequency range is a potential interference source for the target vehicle. The anti-interference ability of the target vehicle can be determined based on the noise intensity and risk frequency band of the target vehicle determined after simulation. The noise intensity is compared with the preset intensity threshold, and the risk frequency band is compared with the preset frequency range. When the noise intensity is greater than the preset intensity threshold, it means that there are a large number of disturbance signals in the environment that will affect the normal operation of the target vehicle. Therefore, the anti-interference ability evaluation result of the target vehicle is considered to be unqualified. The preset frequency range is the preset working frequency range that the target vehicle needs to work normally. Therefore, if there is an overlap between the risk frequency band and the preset frequency range, the target vehicle may not be able to work normally at the working frequency. Therefore, the anti-interference ability evaluation result of the target vehicle is considered to be unqualified.
[0101] In another embodiment, the simulation of the whole vehicle immunity simulation model can be implemented by using a field-circuit collaborative method. In the target simulation software (such as CST software), the simulation is implemented through the collaborative work of three modules, namely: a three-dimensional simulation module, a wiring harness simulation module and a circuit module. Among them, the three-dimensional simulation module uses a time-domain broadband algorithm to calculate the three-dimensional electromagnetic field simulation model of the overall three-dimensional structure (whole vehicle, antenna, etc.) (i.e., the whole vehicle immunity simulation model). It is necessary to first specify the frequency band to be simulated, set the frequency step that meets the standard requirements and the convergence numerical requirements to be achieved by the calculation; the wiring harness simulation module uses the transmission line matrix method to calculate the RLCG (resistance, inductance, capacitance, conductance) parameters of each transmission line segment, and convert them into equivalent circuits to form a simulation model of the entire wiring harness; the circuit module sets a field calibration curve that meets the test level required in the immunity simulation requirements, and reasonably sets the source impedance and load impedance of the wiring harness, and sets the frequency band and frequency step that also meet the requirements.
[0102] Those skilled in the art will understand that in the above-mentioned method of the specific implementation method, the writing order of each step does not mean a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.
[0103] In order to implement the above-mentioned vehicle anti-interference ability evaluation method, this application also proposes a vehicle anti-interference ability evaluation device, please refer to Figure 4 , Figure 4 It is a structural diagram of an embodiment of a vehicle anti-interference capability evaluation device provided in this application.
[0104] The vehicle anti-interference capability evaluation device 400 of this embodiment includes:
[0105] A construction module 41 is used to construct a vehicle body structure model and a cable structure model corresponding to the target vehicle;
[0106] An import module 42 is used to import the vehicle body structure model and the cable structure model into the target site model in the target simulation software to obtain a vehicle immunity simulation model;
[0107] The simulation module 43 is used to calculate the vehicle immunity simulation model to obtain simulation data, and determine the anti-interference ability evaluation result of the target vehicle based on the simulation data;
[0108] Among them, the target site model is constructed by the anti-interference antenna model and the environmental simulation model. The anti-interference antenna model is used to simulate electromagnetic interference other than the target vehicle, and the environmental simulation model is used to simulate the physical environment for testing the anti-interference ability of the vehicle.
[0109] In order to implement the above-mentioned vehicle anti-interference ability evaluation method, this application also proposes a vehicle anti-interference ability evaluation device, please refer to Figure 5 , Figure 5 It is a structural diagram of an embodiment of a vehicle anti-interference capability evaluation device provided in this application.
[0110] The vehicle anti-interference capability evaluation device 500 of this embodiment includes a processor 51 , a memory 52 , an input / output device 53 , and a bus 54 .
[0111] The processor 51 , the memory 52 , and the input / output device 53 are respectively connected to a bus 54 . The memory 52 stores a computer program, and the processor 51 is used to execute the computer program to implement the vehicle anti-interference capability evaluation method of the above embodiment.
[0112] In the embodiment of the present application, the processor 51 may also be referred to as a CPU (Central Processing Unit). The processor 51 may be an integrated circuit chip having signal processing capabilities. The processor 51 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. A general-purpose processor may be a microprocessor, or the processor 51 may be any conventional processor.
[0113] This application also provides a computer storage medium, please continue to refer to Figure 6 , Figure 6 1 is a schematic structural diagram of an embodiment of a computer storage medium provided in the present application. The computer storage medium 600 stores a computer program 61. When the computer program 61 is executed by the processor, it is used to implement the vehicle anti-interference capability evaluation method of the above embodiment.
[0114] When the embodiments of the present application are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the various implementation methods of the present application. The aforementioned storage medium includes various media that can store programs, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.
[0115] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A method for evaluating vehicle anti-interference capability, characterized in that: The method comprises: Construct the vehicle body structure model and cable structure model corresponding to the target vehicle; Importing the vehicle body structure model and the cable structure model into a target site model in target simulation software to obtain a vehicle immunity simulation model; Calculating the vehicle immunity simulation model to obtain simulation data, and determining an anti-interference capability evaluation result of the target vehicle based on the simulation data; The target site model is constructed by an anti-interference antenna model and an environmental simulation model. The anti-interference antenna model is used to simulate electromagnetic interference other than the target vehicle, and the environmental simulation model is used to simulate the physical environment for testing the anti-interference ability of the vehicle.
2. The vehicle anti-interference capability evaluation method according to claim 1, characterized in that: Before importing the vehicle body structure model and the cable structure model into a target site model in target simulation software, the method further includes: Importing each antenna in the anti-interference antenna model into a corresponding preset position in the environmental simulation model to obtain an initial site model; Performing field calibration and uniformity verification on the initial site model to obtain field calibration data and field uniformity data; The initial site model is adjusted according to the field calibration data and the field uniformity data to obtain the target site model.
3. The vehicle anti-interference capability evaluation method according to claim 1, characterized in that: Before obtaining the vehicle body structure model and the cable structure model corresponding to the target vehicle, the method further includes: Obtaining a vehicle digital model file corresponding to the vehicle structure of the target vehicle; Removing data of a target module from the vehicle digital model file to obtain a vehicle body digital model file, wherein the target module is a module in the vehicle structure that has no relevance to radiation immunity; Converting the data format of the vehicle body digital model file into a data format supported by the target simulation software to obtain a vehicle body structure file; Modeling is performed according to the vehicle body structure file to obtain the vehicle body structure model.
4. The vehicle anti-interference capability evaluation method according to claim 1, characterized in that: Before constructing the vehicle body structure model and the cable structure model corresponding to the target vehicle, the method further includes: Acquiring wiring harness direction information arranged in the target vehicle, wherein the wiring harness direction information at least includes an entry position, an exit position, and key point positions of a transmission path of the wiring harness; generating a three-dimensional curve according to the wiring harness direction information; The cable structure model is created according to the three-dimensional curve.
5. The vehicle anti-interference capability evaluation method according to claim 1, characterized in that: Calculate the vehicle immunity simulation model to obtain simulation data, including: Applying disturbance to the target site model in the vehicle immunity simulation model; In response to the disturbance, simulation data at the target position is acquired, wherein the simulation data at least includes current data, voltage data, and electromagnetic field data.
6. The vehicle anti-interference capability evaluation method according to claim 5, characterized in that: Before applying disturbance to the target site model in the vehicle immunity simulation model, the method further includes: Obtaining an evaluation requirement, wherein the evaluation requirement is used to indicate an evaluation of an anti-interference capability of a target part in the target vehicle; A target probe is set at the target position corresponding to the target part in the vehicle immunity simulation model, so as to collect the simulation data at the target position using the target probe.
7. The vehicle anti-interference capability evaluation method according to claim 5, characterized in that: Determining an anti-interference capability evaluation result of the target vehicle according to the simulation data includes: Determining the noise intensity and risk frequency band at the target location based on the simulation data, wherein the risk frequency band is a problematic frequency range that causes interference to the target vehicle; The anti-interference capability evaluation result of the target vehicle is determined according to the noise intensity and the risk frequency band.
8. The vehicle anti-interference capability evaluation method according to claim 7, characterized in that: Determining the anti-interference capability evaluation result of the target vehicle according to the noise intensity and the risk frequency band includes: If the noise intensity is greater than a preset intensity threshold, determining that the anti-interference capability evaluation result is unqualified; and / or, In a case where there is an overlap between the risk frequency band and a preset frequency range, the anti-interference capability evaluation result is determined to be unqualified, wherein the preset frequency range is a range standard of the vehicle's operating frequency.
9. A vehicle anti-interference capability evaluation device, characterized in that: The vehicle anti-interference capability evaluation device includes a memory and a processor coupled to the memory; The memory is used to store a computer program, and the processor is used to execute the computer program to implement the vehicle anti-interference capability evaluation method according to any one of claims 1 to 8.
10. A computer storage medium, characterized in that The computer storage medium is used to store a computer program, and when the computer program is executed by a computer, it is used to implement the vehicle anti-interference capability evaluation method according to any one of claims 1 to 8.