Vehicle waterproof performance test method, vehicle waterproof performance acquisition method, vehicle waterproof performance test device, vehicle waterproof performance acquisition device and vehicle

Abstract

The invention provides a vehicle waterproof performance test method and device, an acquisition method and device and a vehicle. The method comprises the following steps: determining a simulated driving condition according to a preset driving scene of a tested vehicle; the simulated driving condition comprises simulated rainfall; in three-dimensional virtual simulation software, carrying out virtual reduction on physical phenomena such as rainfall process, liquid drop gathering, liquid film and liquid drop stripping on a free surface, and determining a rainfall state of the test vehicle under the simulated rainfall; and determining a waterproof performance test result of the test vehicle according to the rain state. According to the simulated rainfall reduction rainfall process, the liquid film formed on the surface of the tested vehicle by raindrops and the liquid drop stripping process on the free surface, the rainfall state of the tested vehicle under the simulated rainfall can be more accurately determined, and the dynamic process of the tested vehicle under the rainfall state can be more accurately simulated; therefore, the waterproof performance test result of the test vehicle can be determined more accurately, and the risk identification precision and reliability of the test vehicle are improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle testing technology, and in particular to a vehicle waterproof performance testing method, acquisition method, device and vehicle. Background Art

[0002] At present, most car companies test the waterproof performance of test vehicles through simulation software during the development stage, so as to adjust and optimize the test vehicles according to the waterproof performance test results, which can reduce development costs and shorten product development cycles. Specifically, the approximate rain area covered by rainwater that can flow into the ventilation cover of the test vehicle is determined, and the rainfall flow rate is calculated by multiplying it with the rainfall amount; the rainfall flow rate is assigned to the upper edge of the front windshield in the air conditioning waterproof model of the test vehicle to simulate the rain state of the test vehicle; and then the waterproof performance test results of the test vehicle are determined according to the rain state. However, the current technical solution cannot accurately simulate the dynamic process of the test vehicle in the rain state, so it is impossible to accurately determine the waterproof performance test results of the test vehicle.

[0003] Therefore, how to improve the accuracy of testing the waterproof performance of a test vehicle is a technical problem that technicians in this field currently need to solve. Summary of the invention

[0004] The purpose of this application is to provide a vehicle waterproof performance testing method, device, a vehicle waterproof performance acquisition method, terminal equipment, vehicle and computer-readable storage medium, aiming to more accurately determine the waterproof performance test results of the test vehicle, improve the efficiency of the waterproof performance test of the test vehicle, and improve the accuracy and reliability of risk identification of the test vehicle.

[0005] In a first aspect, the present application provides a method for testing the waterproof performance of a vehicle. The method comprises:

[0006] Determining a simulated driving condition according to a preset driving scenario of the test vehicle; the simulated driving condition includes simulated rainfall;

[0007] In the three-dimensional virtual simulation software, the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface are virtually restored to determine the raining state of the test vehicle under the simulated rainfall;

[0008] The waterproof performance test result of the test vehicle is determined according to the rain condition.

[0009] In one of the embodiments, in the three-dimensional virtual simulation software, the physical phenomena of the rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface are virtually restored to determine the rain state of the test vehicle under the simulated rainfall, including:

[0010] In the three-dimensional virtual simulation software, the Lagrangian particle model, the Euler multinomial multiphase flow model and the Euler liquid film model are used to virtually restore the physical phenomena of the rainfall process, droplet aggregation, liquid film and droplet detachment on the free surface to determine the rain state of the test vehicle under the simulated rainfall.

[0011] In one of the embodiments, the simulated driving condition also includes: vehicle driving status, vehicle body posture, wiper operating status and air conditioning operating status.

[0012] In one embodiment, determining the waterproof performance test result of the test vehicle according to the rain state includes:

[0013] Get the test project target;

[0014] The waterproof performance test result of the test vehicle is determined according to the test item objective and the rain condition.

[0015] In one embodiment, the method further comprises:

[0016] If the waterproof performance test result shows that there is a risk of water seepage, the test vehicle is adjusted and optimized according to the waterproof performance test result.

[0017] In one embodiment, the adjusting and optimizing the test vehicle according to the waterproof performance test result includes:

[0018] The material, structure and location of components of the test vehicle are adjusted.

[0019] In one embodiment, the method further comprises:

[0020] Get the current air inlet humidity of the air conditioner;

[0021] If the current air inlet humidity of the air conditioning box is greater than the preset humidity threshold, a target mixed air ratio value corresponding to the current air inlet humidity of the air conditioning box is determined according to a preset corresponding relationship;

[0022] The air conditioning system is controlled to operate according to the target mixed air ratio value.

[0023] In one embodiment, the method further comprises:

[0024] Determine corresponding prompt information according to the waterproof performance test result, and send the prompt information.

[0025] In a second aspect, the present application also provides a method for obtaining the waterproof performance of a vehicle, the method comprising:

[0026] Get the actual rainfall of real vehicles in real driving scenarios;

[0027] In the three-dimensional virtual simulation software, the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface are virtually restored to determine the raining state of the actual vehicle under the actual rainfall;

[0028] The waterproof performance test result of the actual vehicle is determined according to the rain state, and the waterproof performance test result is sent to the actual vehicle. In a third aspect, the present application also provides a vehicle waterproof performance test device. The device includes:

[0029] A parameter determination module, used to determine a simulated driving condition according to a preset driving scenario of the test vehicle; the simulated driving condition includes simulated rainfall;

[0030] A simulation module, used to virtually restore the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface in a three-dimensional virtual simulation software, and determine the raining state of the test vehicle under the simulated rainfall;

[0031] The result determination module is used to determine the waterproof performance test result of the test vehicle according to the rain state.

[0032] In a fourth aspect, the present application also provides a vehicle, comprising a vehicle body and a controller, wherein the controller executes the steps of the above method.

[0033] In a fifth aspect, the present application further provides a terminal device, wherein the terminal device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0034] In a sixth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0035] The present application provides a method for testing the waterproof performance of a vehicle, which virtually restores the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface, that is, the rainfall process and the formation of a liquid film by raindrops falling on the surface of a test vehicle and the droplet peeling process on the free surface are restored according to the simulated rainfall. Therefore, the rain state of the test vehicle under the simulated rainfall can be determined more accurately, and the dynamic process of the test vehicle under the rain state can be simulated more accurately. Therefore, the waterproof performance test result of the test vehicle can be determined more accurately, thereby improving the accuracy and reliability of risk identification of the test vehicle.

[0036] It can be understood that the vehicle waterproof performance testing device, vehicle waterproof performance acquisition method, terminal equipment, a vehicle and computer-readable storage medium provided in the embodiments of the present application have the same beneficial effects as the above-mentioned vehicle waterproof performance testing method, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present application 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A flow chart of a vehicle waterproof performance testing method provided in an embodiment of the present application;

[0039] Figure 2 A flow chart for adjusting the humidity of fresh air outlet provided in an embodiment of the present application;

[0040] Figure 3 A corresponding relationship diagram between the air inlet humidity and the mixed air ratio value of an air conditioning box provided in an embodiment of the present application;

[0041] Figure 4 A cloud diagram of the hydrophobic performance of a ventilated cover plate of a test vehicle provided in an embodiment of the present application;

[0042] Figure 5 A cloud diagram of water accumulation at an external circulation fresh air outlet of a test vehicle provided in an embodiment of the present application;

[0043] Figure 6 A rain and pressure cloud diagram of an exterior rearview mirror of a test vehicle provided in an embodiment of the present application;

[0044] Figure 7 A schematic diagram of adjusting and optimizing the fresh air outlet structure of a test vehicle provided in an embodiment of the present application;

[0045] Figure 8 A cloud diagram corresponding to the fresh air outlet structure before and after adjustment and optimization provided in an embodiment of the present application;

[0046] Fig. 9 A monitoring curve diagram of fresh air humidity of air conditioner obtained by monitoring according to the method of this embodiment provided in the embodiment of the present application;

[0047] Fig.10 The figure is a schematic structural diagram of a vehicle waterproof performance testing device provided in an embodiment of the present application;

[0048] Fig.11A schematic diagram of the structure of a terminal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0050] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0051] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0052] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0053] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0054] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. "Multiple" means "two or more".

[0055] In recent years, testing vehicles through simulation software and ensuring that the test vehicles pass the simulation test before being put into market use can save a lot of testing resources.

[0056] At present, most car companies use simulation software to test the waterproof performance of test vehicles during the development stage, so as to adjust and optimize the test vehicles according to the waterproof performance test results, which can reduce development costs and shorten product development cycles. Specifically, the approximate rain area covered by rainwater that can flow into the ventilation cover of the test vehicle is determined, and the rainfall flow rate is calculated by multiplying it with the rainfall amount; the rainfall flow rate is assigned to the upper edge of the front windshield in the air conditioning waterproof model of the test vehicle to simulate the rain state of the test vehicle; and then the waterproof performance test results of the test vehicle are determined according to the rain state.

[0057] The inventors of the present invention have noticed that directly simulating the rain state of the test vehicle based on the rainfall flow rate is quite different from the actual rain state of the vehicle, and cannot accurately simulate the rain state of the test vehicle, that is, it cannot accurately simulate the dynamic process of the test vehicle under the rain state, and therefore cannot accurately determine the test results of the waterproof performance of the test vehicle.

[0058] Therefore, how to improve the accuracy of testing the waterproof performance of a test vehicle is a technical problem that technicians in this field currently need to solve.

[0059] In order to accurately simulate the dynamic process of the test vehicle under rain conditions, and thus accurately determine the test results of the test vehicle's waterproof performance, the inventors disassembled the states corresponding to the entire process of simulating the test vehicle's raining, and virtually restored actual physical phenomena such as the rainfall process, droplet aggregation, liquid film, and droplet peeling on the free surface. That is, the rainfall process and the process of raindrops falling on the surface of the test vehicle to form a liquid film and droplet peeling on the free surface were restored according to the simulated rainfall. Therefore, the rain state of the test vehicle under the simulated rainfall can be determined more accurately, and the dynamic process of the test vehicle under rain conditions can be more accurately simulated. Therefore, the test results of the test vehicle's waterproof performance can be determined more accurately, thereby improving the accuracy and reliability of risk identification of the test vehicle.

[0060] A vehicle waterproof performance testing method provided in an embodiment of the present application can be executed by a processor of a terminal device when running a corresponding computer program.

[0061] Figure 1 This is a flow chart of a vehicle waterproof performance testing method provided in an embodiment of the present application. For ease of explanation, only the part related to the present embodiment is shown. The method provided in the present embodiment includes the following steps:

[0062] S100: Determine a simulated driving condition according to a preset driving scenario of the test vehicle; the simulated driving condition includes simulated rainfall.

[0063] Among them, the test vehicle refers to the vehicle that needs to undergo development testing, that is, the vehicle that needs to be simulated in a rainy environment. The test vehicle can be determined based on the vehicle type and vehicle model.

[0064] Among them, the preset driving scenario can be the sales area or driving area of ​​the test vehicle; the simulated driving condition refers to the driving environment of the test vehicle to be simulated; the driving environment at least includes simulated rainfall, and can also include terrain environment and wind level, etc., which is not limited in this embodiment.

[0065] Specifically, the simulated rainfall refers to the maximum rainfall value that may exist in a preset driving scenario. It is understandable that the maximum rainfall values ​​are different in different geographical locations, so the maximum rainfall value needs to be set according to the sales area of ​​the test vehicle. In actual applications, the maximum value of the maximum rainfall values ​​corresponding to each sales area can be used as the simulated rainfall, or the maximum value of the maximum rainfall values ​​corresponding to the sales area of ​​the test vehicle can be used as the simulated rainfall. This embodiment does not limit this, and it is necessary to ensure that the test vehicle can withstand the most stringent maximum rainfall value. Table 1 is a schematic table of maximum rainfall values ​​corresponding to different sales areas provided in an embodiment of the present application:

[0066] Table 1 Schematic diagram of the maximum rainfall values ​​corresponding to different sales areas

[0067] Serial number Sales area <![CDATA[Maximum rainfall value L / (min·m 2 )]]> Whether sold to 1 Temperate and cold regions 7 yes 2 Temperate regions 15 yes 3 Warm tropical regions 25 yes 4 Tropical Regions 52 yes

[0068] As shown in Table 1, assuming that the test vehicle is sold to temperate regions, warm tropical regions, and tropical regions, the corresponding maximum rainfall value is set to 52L / (min·m 2 ), that is, the simulated rainfall of the test vehicle is determined to be 52L / (min·m 2 ).

[0069] S200: In the three-dimensional virtual simulation software, the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet separation on the free surface are virtually restored to determine the raining state of the test vehicle under the simulated rainfall.

[0070] In this embodiment, a simulation is performed in a three-dimensional virtual simulation software based on a test vehicle and simulated driving conditions to determine the raining state of the test vehicle under simulated rainfall, that is, to simulate the dynamic driving process of the test vehicle under simulated rainfall.

[0071] Specifically, the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet detachment on the free surface are virtually restored, including simulation of the movement and interaction of raindrops, the interaction between raindrops and solid surfaces and free surface flow, as well as the liquid film formed by raindrops attaching to the solid surface and the dynamic behavior of the liquid film.

[0072] The three-dimensional virtual simulation software in this embodiment may specifically be Star-CCM+, which is not limited in this embodiment.

[0073] S300: Determine a waterproof performance test result of the test vehicle according to the rain condition.

[0074] Specifically, in the three-dimensional virtual simulation software, after determining the rain state of the test vehicle under the simulated driving condition, a cloud map corresponding to the rain state of the test vehicle is collected, and the waterproof performance test result of the test vehicle is determined based on the cloud map.

[0075] A vehicle waterproof performance testing method provided in an embodiment of the present application determines a simulated driving condition according to a preset driving scenario of a test vehicle, and virtually restores the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface. That is, the rainfall process and the formation of a liquid film by raindrops falling on the surface of the test vehicle and the droplet peeling process on the free surface are restored according to the simulated rainfall. Therefore, the rain state of the test vehicle under the simulated rainfall can be determined more accurately, and the dynamic process of the test vehicle under the rain state can be simulated more accurately. Therefore, the waterproof performance test result of the test vehicle can be determined more accurately, thereby improving the accuracy and reliability of risk identification of the test vehicle.

[0076] Considering that a single model cannot restore the rainfall process and the formation of liquid film and droplet peeling process on the free surface when raindrops fall on the test vehicle surface according to the simulated rainfall; in this embodiment, considering the mutual transformation of the Euler polynomial (VOF) multiphase flow model, the Lagrangian particle (LMP) model and the Euler liquid film (Film) model, the advantages of each model are fully utilized to more accurately simulate the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface. On the basis of the above embodiment, this embodiment further explains and optimizes the technical solution. Specifically, in this embodiment, in the three-dimensional virtual simulation software, the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface are virtually restored to determine the raining state of the test vehicle under the simulated rainfall, including:

[0077] In the three-dimensional virtual simulation software, the Lagrangian particle model, Euler multinomial multiphase flow model and Euler liquid film model are used to virtually restore the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet detachment on the free surface to determine the rain state of the test vehicle under simulated rainfall.

[0078] In this embodiment, in a three-dimensional virtual simulation software, the actual physical phenomena such as rainfall process, droplet aggregation, liquid film and droplet detachment on the free surface are virtually restored based on the Euler multiphase (Volume of Fluid, VOF) multiphase flow model assisted by the Lagrangian Multiphase Model (LMP Model) and the Euler liquid film (Film) model.

[0079] Specifically, the Lagrangian particle model can simulate liquid in the form of droplets, the Euler liquid film model can simulate the process of forming a liquid film on the surface of an object, and the Euler multi-phase flow model can simulate the process of liquid flowing on the surface of an object. In the simulation process, first, the Lagrangian particle model is used to simulate the raining process, and the Lagrangian particle model can simulate the flow process of raindrops dripping in the air; secondly, the Euler liquid film model is used to simulate the process of raindrops falling on the surface of the car body and forming a liquid film on the surface of the car body; finally, the Euler multi-phase flow model is used to simulate the process of liquid gathering to form a flowing liquid after raindrops form a liquid film on the surface of the car body.

[0080] When the liquid reaches the car body, there will be a process of liquid flow, or liquid flow to form a liquid film, or liquid splashing to form droplets. When the flowing liquid enters the car through the ventilation cover, there will be a process where the liquid flows to the dry body baffle for the first time, and a liquid film will be formed on the body baffle. In order to simulate the process of liquid film formation on the body baffle, it is necessary to switch the Euler multinomial multiphase flow model that simulates the liquid flow process to the Euler liquid film model that simulates the liquid film formation process; when the flowing liquid enters the car through the ventilation cover, there will be a process where the liquid hits the body baffle to re-form droplets, and it is necessary to switch the Euler multinomial multiphase flow model that simulates the liquid flow process to the Lagrangian particle model that simulates particle-shaped droplets; when the flowing liquid enters the car through the ventilation cover, the liquid flows to the body baffle to form a liquid film When the liquid flow rate is small, the liquid gathers on the body baffle and directly forms droplets in particle form. At this time, in order to simulate the process of liquid film gathering on the body baffle to form droplets, it is necessary to switch the Euler liquid film model that simulates the liquid film formation process to the Lagrangian particle model that simulates the droplet formation process; when the flowing liquid enters the car through the ventilation cover, there will be liquid flowing to the body baffle. At this time, a liquid film will be formed on the body baffle, and then the liquid will accumulate to form a flowing liquid. At this time, in order to simulate the process of liquid film accumulation on the body baffle to form a flowing liquid, it is necessary to switch the Euler liquid film model that simulates the liquid film formation process to the Euler multi-phase multiphase flow model that simulates the liquid flow process. In the specific simulation process, the three models are switched with each other according to the actual flow form of the liquid to ensure the accuracy and authenticity of the simulation.

[0081] Specifically, the Lagrangian particle (LMP) model uses a Lagrangian framework to simulate the movement and interaction of raindrops by tracking the motion trajectories of discrete particles (representing raindrops). In the simulation, by controlling the generation of particles (such as simulating the generation of raindrops) or disappearance (such as merging or evaporation after droplets hit the surface) under specific conditions, the initial position, speed and direction of raindrops are accurately defined and controlled. Therefore, the dynamic behavior of raindrops can be simulated in the entire three-dimensional space, including the generation, movement, collision and interaction with other raindrops. This comprehensive simulation helps to restore the rainfall process more realistically, that is, restore the process of raindrops landing on the structural surface of the test vehicle. The 3D restoration of the rainfall process through particle streams solves the input boundary problem of raindrop landing, provides more accurate boundary conditions, reduces the dependence on mesh quality and quantity, and makes it more flexible and efficient in the simulation of complex geometric shapes.

[0082] Specifically, the Euler Polynomials (VOF) multiphase flow model tracks the interface of different phases by defining the volume fractions of different phases (such as gas and liquid) in each grid cell. The volume fraction in each grid cell is used to represent the proportion of the cell occupied by different phases. The Euler Polynomials (VOF) multiphase flow model can effectively capture the gas-liquid interface and simulate the dispersion and movement of raindrops in the air, as well as the interaction between raindrops and solid surfaces and free surface flows, such as the splashing of raindrops and the peeling of droplets.

[0083] Specifically, the Euler Film model is used to simulate the liquid film formed by raindrops attached to the solid surface and the dynamic behavior of the liquid film, such as flow, diffusion and evaporation; it simulates the dynamic changes of the liquid film under different conditions, such as the changes in the thickness and flow properties of the liquid film under temperature and humidity changes. The traditional Euler polynomial (VOF) multiphase flow model mainly focuses on the flow of the free surface and the capture of the phase interface, but pays insufficient attention to the behavior of the liquid film near the wall. The Euler Film model is specifically designed for wall liquid film modeling, which can more accurately describe the distribution and dynamic behavior of the liquid film on the wall. Under low liquid fraction conditions, the liquid film may only occupy a small part of the volume within the grid unit. By introducing the liquid film as a separate phase, the Euler Film model can more accurately track and simulate the behavior of the liquid film in these low liquid fraction areas, thereby improving the calculation accuracy.

[0084] In addition, the Euler liquid film (Film) model can be combined with the Euler polynomial (VOF) multiphase flow model. The Euler polynomial (VOF) multiphase flow model simulates phenomena such as free surface flow, stratified flow, filling, sloshing, and processes such as droplet peeling, while the Euler liquid film (Film) model focuses on the behavior of the liquid film near the wall. This complementarity enables the model to simulate multiphase flow more comprehensively, including free surface flow and liquid film behavior near the wall.

[0085] Specifically, in the Euler multinomial (VOF) multiphase flow model, after the droplet hits the wall, its distribution on the wall will form a liquid film. At this time, the volume fraction of the droplet can be converted into the liquid film thickness in the Euler liquid film (Film) model through an algorithm, so that the Euler liquid film (Film) model can be used to simulate the flow and behavior of the liquid film on the wall.

[0086] When the liquid film simulated by the Euler liquid film (Film) model reaches certain dynamic conditions, such as when the film thickness exceeds a certain critical value or is subjected to sufficient shear force, the film will break and form droplets on the free surface. At this time, the thickness and distribution of the liquid film can be converted into volume fractions in the Euler polynomial (VOF) multiphase flow model through an algorithm to simulate the behavior of free droplets.

[0087] In the Euler polynomial (VOF) multiphase flow model, when the droplets reach a certain size or dynamic condition, the volume fraction of the droplets can be converted into particles in the Lagrangian particle (LMP) model. Each particle represents a droplet, and its motion trajectory can be tracked and simulated individually.

[0088] When particles in the Lagrangian particle (LMP) model hit a wall or merge, the properties of the particles (such as position, velocity, size) can be algorithmically converted into volume fractions in the Euler polynomial (VOF) multiphase flow model to simulate the behavior of droplets on the wall or after merging.

[0089] When the liquid film simulated by the Euler liquid film (Film) model breaks to form droplets, the properties of the liquid film can be converted into particles in the Lagrangian particle (LMP) model through an algorithm to simulate the detailed dynamic behavior of the droplets.

[0090] Although the Euler polynomials (VOF) multiphase flow model can be used in the prior art to simulate the processes of liquid dripping, liquid film formation, and liquid flow, in this process, the Euler polynomials (VOF) multiphase flow model needs to define the volume fractions of different phases (such as gas phase and liquid phase) in each grid unit to track the interfaces of different phases. The defined grid must be divided to less than one hundred thousandth, which requires greater calculation accuracy and increases the amount of calculation. The calculation time is too long to meet the requirements of the normal operation cycle of the vehicle, and there is a problem of slow response. At the same time, the Euler polynomials (VOF) multiphase flow model is difficult to capture splashing droplets in the process of simulating the transformation of flowing liquid into droplets, and there is a problem of poor simulation authenticity. This solution can fully utilize the advantages of each model and make up for the shortcomings of a single model by converting the Euler polynomial (VOF) multiphase flow model, the Lagrangian particle (LMP) model and the Euler liquid film (Film) model to enrich the rain scene. When the three models are combined, the Euler polynomial (VOF) multiphase flow model can reduce the grid division accuracy and the amount of calculation, thereby improving the calculation speed. The combination with the Lagrangian particle (LMP) model and the Euler liquid film (Film) model can more accurately virtually restore the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet detachment on the free surface, that is, it can simulate a complex rain environment and more accurately simulate the rain state of the test vehicle under simulated driving conditions.

[0091] On the basis of the above embodiments, this embodiment further illustrates and optimizes the technical solution. Specifically, in this embodiment, the simulated driving conditions also include: vehicle driving status, vehicle body posture, wiper operating status and air conditioning operating status.

[0092] The vehicle driving state includes an idling state, a high-speed driving state, a low-speed driving state, and the like.

[0093] Among them, the body posture corresponding to the test vehicle is determined according to the simulated different driving roads; the body posture includes horizontal state, front side raised, rear side raised, left side raised, right side raised, left front raised, right front raised, left rear raised and right rear raised, etc. For example, when the test vehicle is in a climbing state, the body posture is front side raised; when the test vehicle is in a downhill state, the body posture is rear side raised; when the driving road surface is unilaterally raised, the body posture is left side raised or right side raised; when there is an obstacle on the driving road surface causing a single wheel to pass the obstacle, the body posture is left front raised, right front raised, left rear raised or right rear raised.

[0094] The wiper operating state refers to the states of different operating speeds of the wiper, including a low-speed operating state and a high-speed operating state.

[0095] Among them, the air-conditioning operating status refers to different operating modes of the air-conditioning, such as the minimum air volume of the external circulation in the face-blowing mode and the maximum air volume of the external circulation in the face-blowing mode.

[0096] In this embodiment, the simulated driving conditions are further enriched, and the rain state of the test vehicle under the simulated driving conditions can be simulated more accurately, and the scene of the test vehicle driving in the rain can be simulated. Therefore, the waterproof performance test results of the test vehicle can be determined more accurately, and the efficiency of the waterproof performance test of the test vehicle is improved; the accuracy and reliability of risk identification of the test vehicle are improved.

[0097] Based on the above embodiment, this embodiment further illustrates and optimizes the technical solution. Specifically, in this embodiment, the waterproof performance test result of the test vehicle is determined according to the rain state, including:

[0098] Get the test project target;

[0099] The waterproof performance test results of the test vehicle are determined based on the test project objectives and rain conditions.

[0100] Among them, the test project objectives refer to the indicators that need to be achieved by the test items of the test vehicle; the test items may include but are not limited to testing the vehicle's air conditioning waterproof performance, the hydrophobic performance of the surrounding environment of sensitive components, and the hydrophobic performance of the entire vehicle; the test project objectives may include: no obvious water entering the air conditioning external circulation fresh air outlet, good hydrophobic performance of the ventilation cover, and no water flow impact at the joint between the exterior rearview mirror and the door panel.

[0101] In this embodiment, a cloud map of the corresponding part of the test vehicle in the rain state is collected for the test item corresponding to the test item target, and whether the test vehicle can achieve the test item target is determined based on the cloud map to determine the waterproof performance test result of the test vehicle.

[0102] According to the method of this embodiment, the waterproof performance test result of the test vehicle can be determined according to the test item target, and the waterproof performance test result of the test vehicle can be determined more accurately.

[0103] On the basis of the above embodiments, this embodiment further illustrates and optimizes the technical solution. Specifically, in this embodiment, the method further includes:

[0104] If the waterproof performance test result shows that there is a risk of water seepage, the test vehicle will be adjusted and optimized based on the waterproof performance test result.

[0105] In this embodiment, the test vehicle is adjusted and optimized based on the waterproof performance test result indicating that there is a risk of water seepage.

[0106] It should be noted that the corresponding components are determined based on the waterproof performance test results, and the components are adjusted, such as adjusting one or more of the component materials, structures and setting positions of the test vehicle, to eliminate the risk of water seepage in the test vehicle under simulated rain conditions.

[0107] It should be noted that adjusting and optimizing the test vehicle based on the waterproof performance test results during the testing phase can avoid a large number of test verifications in the later stage and reduce vehicle development costs.

[0108] In a specific embodiment, adjusting and optimizing the test vehicle according to the waterproof performance test result includes:

[0109] Adjust the material, structure and location of components of the test vehicle.

[0110] It should be noted that in order to eliminate the risk of water seepage in the test vehicle and improve the waterproofness of the test vehicle, the material of the corresponding replacement test vehicle parts can be determined according to the water seepage location, such as using hydrophobic materials or coatings to prevent water from accumulating on the surface of the fresh air outlet.

[0111] In addition, the structure of components can be modified to reduce the penetration of rainwater into the vehicle, such as improving the shape and angle of the fresh air vents to reduce the possibility of direct entry of rainwater, or designing guide plates or water baffles to guide rainwater away from the fresh air vents, or optimizing the body surface design near the fresh air vents to reduce the accumulation of rainwater in the fresh air vent area.

[0112] In practical applications, the setting positions of components can also be adjusted to reduce the possibility of rainwater infiltration.

[0113] It should be noted that one or more of the material, structure and setting position of the test vehicle's components may be adjusted to effectively eliminate the risk of water seepage in the test vehicle, that is, to avoid water seepage in possible water seepage parts.

[0114] It can be seen that according to the method of this embodiment, the test vehicle is adjusted and optimized according to the waterproof performance test results during the test phase, which can avoid a large number of test verifications in the later stage and reduce the cost of vehicle model development.

[0115] Generally speaking, it is impossible to improve the fresh air humidity by simply optimizing the risk of water inflow into the fresh air outlet of the external circulation. The reason is that when rainwater flows into the ventilation cover, it mixes with the high-speed airflow of the air conditioner's external circulation, so that part of the rainwater is carried to the air conditioner in the form of water mist by the airflow. Therefore, based on the above embodiment, another vehicle waterproof performance test method provided in this embodiment also includes:

[0116] Get the current air inlet humidity of the air conditioner;

[0117] If the current air inlet humidity of the air conditioner is greater than the preset humidity threshold, the target mixed air ratio value corresponding to the current air inlet humidity of the air conditioner is determined according to the preset corresponding relationship;

[0118] Control the air conditioning system to operate according to the target mixed air ratio value.

[0119] It is understandable that the human body's acceptable humidity may be different for people in different geographical locations; therefore, the preset humidity threshold can be set according to the human body's acceptable humidity in the area where the test vehicle is sold. It should be noted that the user is in a comfortable state only when the current air-conditioning box inlet humidity is less than or equal to the preset humidity threshold, that is, the current air-conditioning box inlet humidity is within the human body's acceptable humidity range. Table 2 is a correspondence table of different sales areas and human body's acceptable humidity provided in an embodiment of the present application.

[0120] Table 2 Correspondence between different sales regions and human body acceptable humidity

[0121]

[0122]

[0123] Generally, the minimum value of the human body acceptable humidity corresponding to each sales area of ​​the test vehicle is used as the preset humidity threshold, indicating that it is necessary to ensure that the test vehicle can meet the user's highest human body acceptable humidity requirement.

[0124] Combination Figure 2 A flow chart for adjusting the humidity of the fresh air outlet is shown. Specifically, a humidity sensor can be used to collect the current air inlet humidity of the air conditioning box, and determine whether the current air inlet humidity of the air conditioning box is greater than a preset humidity threshold; if the current air inlet humidity of the air conditioning box is less than or equal to the preset humidity threshold, it means that the current air inlet humidity of the air conditioning box is within the acceptable humidity range for the human body, and therefore no additional operation is required; if the current air inlet humidity of the air conditioning box is greater than the preset humidity threshold, it means that the current air inlet humidity of the air conditioning box needs to be lowered.

[0125] More specifically, the mixed air ratio requirements under different air conditioning box inlet humidity are calibrated in advance by simulation to determine the corresponding relationship between the air conditioning box inlet humidity and the mixed air ratio value. Figure 3 A correspondence diagram between the air inlet humidity of an air-conditioning box and the mixed air ratio value is provided in an embodiment of the present application; in the correspondence diagram, when the mixed air ratio value is greater than the preset humidity threshold value of 75% (the air inlet humidity of the air-conditioning box is 75%-100%), it is necessary to determine the target mixed air ratio value corresponding to the current air inlet humidity of the air-conditioning box according to the preset correspondence.

[0126] After determining the target mixed air ratio value, control the air conditioning system to operate according to the target mixed air ratio value, reduce the air intake volume of the external circulation, increase the internal circulation mixed air ratio, and reduce the air intake humidity of the air conditioning box by regulating the internal and external circulation.

[0127] In a specific example, the weight comparison of the air conditioning filter before and after simulated rain can be used to determine whether the air intake humidity of the air conditioning box is within a preset weight range, thereby determining whether the air conditioning fresh air humidity is maintained within a comfortable range.

[0128] According to the method of this embodiment, it can further ensure that the humidity of the fresh air of the air conditioner is maintained within the user's comfortable range, so as to further enhance the user experience.

[0129] On the basis of the above embodiments, this embodiment further illustrates and optimizes the technical solution. Specifically, in this embodiment, the method further includes:

[0130] Determine the corresponding prompt information according to the waterproof performance test results and send the prompt information.

[0131] In this embodiment, after the waterproof performance test result of the test vehicle is determined by the three-dimensional virtual simulation software, the corresponding prompt information is determined according to the waterproof performance test result, and the prompt information is sent to the corresponding prompt device, and the prompt device continuously sends a corresponding signal to prompt the user to understand the waterproof performance test result of the test vehicle in a timely and intuitive manner. Among them, the prompt device includes a buzzer, an indicator light, a voice player or a display, etc., and this embodiment does not limit the specific type of the prompt device.

[0132] In actual applications, after adjusting and optimizing the test vehicle according to the waterproof performance test results, a corresponding optimization log can be generated by recording the contents of each adjustment and optimization, so that the optimization contents of the test vehicle can be queried later according to the optimization log.

[0133] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application are described in detail below in combination with actual application scenarios. In the embodiments of this application, the specific steps of a vehicle waterproof performance test method are as follows:

[0134] Determine simulated driving conditions based on preset driving scenarios of the test vehicle;

[0135] Determine test project objectives based on product definitions and rules;

[0136] The simulated driving conditions and test project objectives are determined as shown in Table 3 below:

[0137] Table 3 Simulated driving conditions and test project objectives

[0138]

[0139] In the three-dimensional virtual simulation software Star-CCM+, based on the Euler multinomial (Volume of Fluid, VOF) multiphase flow model supplemented by the Lagrangian Multiphase Model (LMP) model and the Euler liquid film (Film) model, the actual physical phenomena such as rainfall process, droplet aggregation, liquid film and droplet separation on the VOF free surface are virtually restored;

[0140] Obtain a cloud map of the test vehicle in the rain state, and determine whether the test vehicle can achieve the test project objectives based on the cloud map to determine the test results of the test vehicle's waterproof performance; Figure 4 A cloud diagram of the hydrophobic performance of a ventilated cover plate of a test vehicle provided in an embodiment of the present application; Figure 5 A cloud diagram of water accumulation at an external circulation fresh air outlet of a test vehicle provided in an embodiment of the present application; Figure 6 A rain and pressure cloud diagram of the exterior rearview mirror of a test vehicle provided in an embodiment of the present application; combined with Figure 4 , Figure 5 and Figure 6 As shown, it was determined that there was a risk of water seepage at the external circulation fresh air vents and exterior rearview mirrors of the test vehicle;

[0141] To address the risk of water seepage, the test vehicle is adjusted and optimized, including adjusting the material, structure and location of the test vehicle components; Figure 7 , which is a schematic diagram of adjusting and optimizing the fresh air outlet structure of a test vehicle provided in an embodiment of the present application, and Figure 8 A cloud diagram corresponding to the fresh air outlet structure before and after adjustment and optimization is shown; combined with the attached figure, it can be seen that after the fresh air outlet structure is adjusted and optimized, the risk of water seepage in the fresh air outlet is eliminated;

[0142] After the actual vehicle was assembled, the rain performance test of the whole vehicle was carried out, and the results showed that all performance indicators were achieved.

[0143] The mixed air ratio requirements under different air inlet humidity of the air conditioner are calibrated in advance through simulation, and the corresponding relationship between the air inlet humidity of the air conditioner and the mixed air ratio value is determined; the current air inlet humidity of the air conditioner is obtained; if the current air inlet humidity of the air conditioner is greater than the preset humidity threshold, the target mixed air ratio value corresponding to the current air inlet humidity of the air conditioner is determined according to the preset corresponding relationship; the air conditioning system is controlled to operate according to the target mixed air ratio value. Fig. 9 This is a monitoring curve diagram of the fresh air humidity of the air conditioner monitored according to the method of this embodiment. The test results show that the fresh air humidity of the air conditioner is always maintained within a comfortable range.

[0144] A vehicle waterproof performance testing method provided in an embodiment of the present application determines a simulated driving condition according to a preset driving scenario of a test vehicle, and virtually restores the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface. That is, the rainfall process and the formation of a liquid film by raindrops falling on the surface of the test vehicle and the droplet peeling process on the free surface are restored according to the simulated rainfall. Therefore, the rain state of the test vehicle under the simulated rainfall can be determined more accurately, and the dynamic process of the test vehicle under the rain state can be simulated more accurately. Therefore, the waterproof performance test result of the test vehicle can be determined more accurately, thereby improving the efficiency of the waterproof performance test of the test vehicle and improving the accuracy and reliability of risk identification of the test vehicle.

[0145] The present application also provides a method for obtaining the waterproof performance of a vehicle, the method comprising:

[0146] Get the actual rainfall of real vehicles in real driving scenarios;

[0147] In the 3D virtual simulation software, the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet separation on the free surface are virtually restored to determine the raining state of the actual vehicle under the actual rainfall;

[0148] The waterproof performance test result of the actual vehicle is determined according to the rain condition, and the waterproof performance test result is sent to the actual vehicle.

[0149] In this embodiment, the actual rainfall of the actual vehicle in the actual driving scenario is obtained, and the actual rainfall is determined as the simulated rainfall in the three-dimensional virtual simulation software; in the three-dimensional virtual simulation software, the physical phenomena of the rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface are virtually restored to determine the rain state of the actual vehicle under the actual rainfall; that is, the corresponding rain state of the actual vehicle under the actual rainfall is predicted, and the waterproof performance test result is determined according to the simulated rain state, that is, the waterproof performance test result of the actual vehicle is obtained, and the waterproof performance test result is sent to the actual vehicle.

[0150] A method for obtaining the waterproof performance of a vehicle provided in an embodiment of the present application obtains the actual rainfall of an actual vehicle in an actual driving scenario, and virtually restores the physical phenomena of the rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface through three-dimensional virtual simulation software to determine the rain state of the actual vehicle under the actual rainfall. That is, the corresponding rain state of the actual vehicle under the actual rainfall is simulated through three-dimensional virtual simulation software, and the dynamic process of the actual vehicle under the rain state is simulated, so as to more accurately determine the waterproof performance test result of the actual vehicle; on this basis, the waterproof performance test result obtained through virtual simulation is further sent to the actual vehicle, so that the actual vehicle can obtain the corresponding waterproof performance test result in advance, so as to be able to take early warning and prevention according to the waterproof performance test result.

[0151] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0152] Fig.10 FIG. 1 is a schematic diagram of the structure of a vehicle waterproof performance testing device provided in an embodiment of the present application. Fig.10 As shown, the vehicle waterproof performance testing device of this embodiment includes a parameter determination module 1010, a simulation module 1020 and a result determination module 1030; wherein,

[0153] The parameter determination module 1010 is used to determine a simulated driving condition according to a preset driving scenario of the test vehicle; the simulated driving condition includes simulated rainfall;

[0154] The simulation module 1020 is used to virtually restore the physical phenomena of the rainfall process, droplet aggregation, liquid film and droplet separation on the free surface, and determine the rain state of the test vehicle under the simulated rainfall;

[0155] The result determination module 1030 is used to determine the waterproof performance test result of the test vehicle according to the rain state.

[0156] A vehicle waterproof performance testing device provided in an embodiment of the present application has the same beneficial effects as the above-mentioned vehicle waterproof performance testing method.

[0157] In one embodiment, the simulation module 1020 includes:

[0158] The simulation submodule is used to virtually restore the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet detachment on the free surface in three-dimensional virtual simulation software using Lagrangian particle model, Euler multinomial multiphase flow model and Euler liquid film model, and determine the rain state of the test vehicle under simulated rainfall.

[0159] In one of the embodiments, the simulated driving condition also includes: vehicle driving status, vehicle body posture, wiper operating status and air conditioning operating status.

[0160] In one embodiment, the result determination module includes:

[0161] The target acquisition submodule is used to obtain the test project target;

[0162] The result determination submodule is used to determine the waterproof performance test result of the test vehicle according to the test project objectives and rain conditions.

[0163] In one embodiment, a vehicle waterproof performance testing device further includes:

[0164] The optimization module is used to adjust and optimize the test vehicle according to the waterproof performance test result if the waterproof performance test result shows that there is a risk of water seepage.

[0165] In one embodiment, the optimization module includes:

[0166] The optimization submodule is used to adjust the material, structure and setting position of the test vehicle components.

[0167] In one embodiment, a vehicle waterproof performance testing device further includes:

[0168] Humidity acquisition module, used to obtain the current air inlet humidity of the air conditioner;

[0169] A mixed air ratio determination module is used to determine a target mixed air ratio value corresponding to the current air conditioning box inlet humidity according to a preset corresponding relationship if the current air conditioning box inlet humidity is greater than a preset humidity threshold;

[0170] The control operation module is used to control the air conditioning system to operate according to the target mixed air ratio value.

[0171] In one embodiment, a vehicle waterproof performance testing device further includes:

[0172] The prompt module is used to determine the corresponding prompt information according to the waterproof performance test result and send the prompt information.

[0173] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0174] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0175] Fig.11A schematic diagram of the structure of a terminal device provided in an embodiment of the present application. Fig.11 As shown, the terminal device 1100 of this embodiment includes a memory 1101, a processor 1102, and a computer program 1103 stored in the memory 1101 and executable on the processor 1102; when the processor 1102 executes the computer program 1103, the steps in the above-mentioned vehicle waterproof performance testing method embodiments are implemented; or when the processor 1102 executes the computer program 1103, the functions of each module / unit in the above-mentioned device embodiments are implemented.

[0176] Exemplarily, the computer program 1103 may be divided into one or more modules / units, one or more modules / units are stored in the memory 1101, and are executed by the processor 1102 to implement the method of the embodiment of the present application. One or more modules / units may be a series of computer program instruction segments that can perform specific functions, and the instruction segments are used to describe the execution process of the computer program 1103 in the terminal device 1100. For example, the computer program 1103 may be divided into a parameter determination module, a simulation module, and a result determination module, and the specific functions of each module are as follows:

[0177] A parameter determination module, used to determine a simulated driving condition according to a preset driving scenario of the test vehicle; the simulated driving condition includes simulated rainfall;

[0178] The simulation module is used to virtually restore the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet separation on the free surface, and determine the rain state of the test vehicle under simulated rainfall;

[0179] The result determination module is used to determine the waterproof performance test result of the test vehicle according to the rain state.

[0180] In application, the terminal device 1100 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The terminal device 1100 may include but is not limited to a memory 1101 and a processor 1102. Those skilled in the art will appreciate that Fig.11 It is only an example of a terminal device and does not constitute a limitation of the terminal device. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal device may also include input and output devices, network access devices, buses, etc.; among which, the input and output devices may include cameras, audio acquisition / playback devices, display screens, etc.; the network access device may include a communication module for wireless communication with external devices.

[0181] In applications, the processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0182] In applications, the memory can be an internal storage unit of a terminal device, such as a hard disk or memory of the terminal device; it can also be an external storage device of the terminal device, such as a plug-in hard disk equipped on the terminal device, a smart media card (SMC), a secure digital (SD) card, a flash card, etc.; it can also include both the internal storage unit and the external storage device of the terminal device. The memory is used to store operating systems, applications, boot loaders, data, and other programs, such as program codes of computer programs. The memory can also be used to temporarily store data that has been output or is about to be output.

[0183] An embodiment of the present application also provides a vehicle, including a vehicle body and a controller, which executes the steps in the above-mentioned method embodiments.

[0184] The vehicle may be any type of vehicle, such as a fuel vehicle, a battery electric vehicle (BEV), a hybrid vehicle, etc. In this embodiment, the vehicle includes a vehicle body and a controller, and the controller can implement the steps of the vehicle waterproof performance test method in the above embodiment.

[0185] A vehicle provided in an embodiment of the present application has the same beneficial effects as the above-mentioned vehicle waterproof performance testing method.

[0186] The embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented.

[0187] The present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of each of the above-mentioned method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device capable of carrying the computer program code to a terminal device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electric carrier signal, a telecommunication signal, and a software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk.

[0188] A computer-readable storage medium provided in an embodiment of the present application has the same beneficial effects as the above-mentioned vehicle waterproof performance testing method.

[0189] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0190] Those of ordinary skill in the art will appreciate that the devices and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0191] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interface, indirect coupling or communication connection of devices, which can be electrical, mechanical or other forms.

[0192] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A vehicle waterproof performance testing method, characterized in that: The method comprises: Determining a simulated driving condition according to a preset driving scenario of the test vehicle; the simulated driving condition includes simulated rainfall; In the three-dimensional virtual simulation software, the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface are virtually restored to determine the raining state of the test vehicle under the simulated rainfall; The waterproof performance test result of the test vehicle is determined according to the rain condition.

2. The method according to claim 1, characterized in that In the three-dimensional virtual simulation software, the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface are virtually restored to determine the raining state of the test vehicle under the simulated rainfall, including: In the three-dimensional virtual simulation software, the Lagrangian particle model, the Euler multinomial multiphase flow model and the Euler liquid film model are used to virtually restore the physical phenomena of the rainfall process, droplet aggregation, liquid film and droplet detachment on the free surface to determine the rain state of the test vehicle under the simulated rainfall.

3. The method according to claim 1, characterized in that The simulated driving conditions also include: vehicle driving status, vehicle body posture, wiper operating status and air conditioning operating status.

4. The method according to claim 1, characterized in that: The step of determining the waterproof performance test result of the test vehicle according to the rain state includes: Get the test project target; The waterproof performance test result of the test vehicle is determined according to the test item objective and the rain condition.

5. The method according to claim 1, characterized in that The method further comprises: If the waterproof performance test result shows that there is a risk of water seepage, the test vehicle is adjusted and optimized according to the waterproof performance test result.

6. The method according to claim 5, characterized in that The adjusting and optimizing the test vehicle according to the waterproof performance test result includes: The material, structure and location of components of the test vehicle are adjusted.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: Get the current air inlet humidity of the air conditioner; If the current air inlet humidity of the air conditioning box is greater than the preset humidity threshold, a target mixed air ratio value corresponding to the current air inlet humidity of the air conditioning box is determined according to a preset corresponding relationship; The air conditioning system is controlled to operate according to the target mixed air ratio value.

8. A method for obtaining the waterproof performance of a vehicle, characterized in that: The method comprises: Get the actual rainfall of real vehicles in real driving scenarios; In the three-dimensional virtual simulation software, the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet peeling on the free surface are virtually restored to determine the raining state of the actual vehicle under the actual rainfall; The waterproof performance test result of the actual vehicle is determined according to the rain state, and the waterproof performance test result is sent to the actual vehicle.

9. A vehicle waterproof performance testing device, characterized in that: The device comprises: A parameter determination module, used to determine a simulated driving condition according to a preset driving scenario of the test vehicle; the simulated driving condition includes simulated rainfall; A simulation module, for virtually restoring the physical phenomena of rainfall process, droplet aggregation, liquid film and droplet separation on the free surface, and determining the raining state of the test vehicle under the simulated rainfall; The result determination module is used to determine the waterproof performance test result of the test vehicle according to the rain state.

10. A vehicle, comprising a vehicle body, characterized in that: It also includes a controller that performs the steps of the method according to any one of claims 1 to 7 or claim 8.

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