Method and system for checking aperture opening ratio of front-end module

Abstract

The invention provides a front-end module aperture ratio checking method and system, and relates to the technical field of automobile thermal management, and the method comprises the steps: obtaining the CAS data of a to-be-checked vehicle; performing grid division on the CAS data, and mapping the divided grids to a first reference plane to obtain a first data set; mapping the front-end module to the first datum plane to obtain a mapping area of the front-end module on the first datum plane, and obtaining grids in the mapping area in the first data set to form a second data set; and calculating the aperture ratio of the front-end module according to the area of the grid in the second data set. According to the invention, the efficiency of checking the aperture ratio of the front-end module can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of automobile thermal management, and in particular to a front-end module aperture ratio calibration method and system. Background Art

[0002] With the popularity of new energy vehicles such as extended-range electric vehicles and plug-in hybrid vehicles, the demand for cooling and temperature reduction of automobiles is gradually increasing. If the opening rate of the front-end module does not meet the requirements, the air intake of the front-end module will not meet the heat dissipation requirements, resulting in a decrease in the performance of the entire vehicle. Therefore, it is necessary to check the opening rate of the front-end module of the automobile and estimate the air volume in the early research and development stage.

[0003] In the related art, the opening ratio of the front-end module is usually checked by building a digital model of each component in the front-end module of the vehicle based on the vehicle development data, and then inputting it into the calculation software for verification after assembly. However, due to the wide variety of vehicle models currently developed by vehicle manufacturers, there are also many front-end module configurations, which results in the need to re-model, assemble, and calculate each model when checking the opening ratio, resulting in the overall verification process being cumbersome and complex, and low efficiency. Summary of the invention

[0004] The embodiment of the present disclosure provides a front-end module aperture ratio calibration method and system to improve the efficiency of front-end module aperture ratio calibration. The technical solution is as follows:

[0005] In a first aspect, a front-end module aperture ratio verification method is provided, comprising:

[0006] Obtain CAS data of the vehicle to be verified;

[0007] Gridding the CAS data, and mapping the gridded data onto a first reference plane to obtain a first data set;

[0008] Mapping the front-end module onto the first reference plane to obtain a mapping area of ​​the front-end module on the first reference plane, and obtaining a grid in the mapping area from the first data set to form a second data set;

[0009] The aperture ratio of the front-end module is calculated according to the area of ​​the grid in the second data set.

[0010] In a second aspect, a front-end module aperture ratio verification system is provided, comprising:

[0011] A data acquisition module, configured to acquire CAS data of a vehicle to be verified;

[0012] A grid division module is configured to perform grid division on the CAS data, and map the divided grids onto a first reference plane to obtain a first data set;

[0013] A front-end module mapping module is configured to map the front-end module onto a first reference plane, obtain a mapping area of ​​the front-end module on the first reference plane, obtain a grid in the mapping area from the first data set, and form a second data set;

[0014] The checking module is configured to calculate the aperture ratio of the front-end module according to the area of ​​the grid in the second data set.

[0015] In a third aspect, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to complete the steps of the above-mentioned front-end module aperture ratio calibration method.

[0016] In a fourth aspect, a computer-readable storage medium is provided for storing computer instructions, and when the computer instructions are executed by a processor, the steps of the above-mentioned front-end module aperture ratio calibration method are completed.

[0017] In a fifth aspect, a computer program product is provided, including a computer program / instruction, which, when executed by a processor, implements the steps of the above-mentioned front-end module aperture ratio calibration method.

[0018] The beneficial effects of the technical solution provided by the embodiment of the present disclosure are as follows: in the embodiment of the present disclosure, the CAS data of the vehicle is used to calibrate the aperture ratio of the front-end module, the CAS data is divided into grids and coordinate mapping is performed, and the calculation and verification of the aperture ratio is realized in conjunction with the input coordinates of the front-end module. The front-end module coordinate area is combined with the grid data, and fast and efficient verification of different vehicle models and different front-end modules can be achieved without remodeling.

[0019] Advantages of additional aspects of the present disclosure will be given in part in the following description, and in part will become apparent from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a flow chart of a front-end module aperture ratio verification method provided by an embodiment of the present disclosure;

[0022] Figure 2 This is a schematic diagram of the front-end module aperture ratio verification process;

[0023] Figure 3It is a schematic diagram of different front-end module layouts;

[0024] Figure 4 is a schematic diagram of a front-end module aperture ratio calibration system provided by an embodiment of the present disclosure;

[0025] Figure 5 It is a structural block diagram of an electronic device provided by an embodiment of the present disclosure.

[0026] Among them, the figure marks respectively represent: 1. low-temperature radiator; 2. oil cooler; 3. condenser; 4. high-temperature radiator; 101. step 101; 102. step 102; 103. step 103; 104. step 104; 200. front-end module opening rate verification system; 201. data acquisition module; 202. grid division module; 203. front-end module mapping module; 204. verification module; 300. electronic device; 301. processor; 302. memory. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0028] Figure 1 is a flow chart of a front-end module aperture ratio calibration method provided by an embodiment of the present disclosure, see Figure 1 , the method comprising:

[0029] Step 101, obtaining CAS data of the vehicle to be verified;

[0030] Step 102, meshing the CAS data, and mapping the meshed data onto a first reference plane to obtain a first data set;

[0031] Step 103: Map the front-end module onto the first reference plane to obtain a mapping area of ​​the front-end module on the first reference plane, obtain the grids in the mapping area in the first data set, and form a second data set;

[0032] Step 104: Calculate the aperture ratio of the front-end module according to the area of ​​the grid in the second data set.

[0033] Due to the wide variety of vehicle models under development at this stage and the large number of front-end module configurations, the cumbersome and inefficient problems of the traditional modeling-first-then-verification method are becoming increasingly prominent. Based on this, the disclosed embodiment proposes to grid the CAS (Concept A Surface, the initial modeling surface of the car) data of the vehicle and use coordinate mapping to quickly verify the opening rate of the front-end module, so that there is no need to re-model the model. This solution is applicable to all vehicle models and can unify the opening rate verification process of different vehicle models to realize a standardized calculation process. At the same time, the grille opening form can be uniformly output to improve the efficiency of the opening rate verification to meet the rapid process of vehicle development iteration.

[0034] In step 101, the CAS data (surface data) of the vehicle to be verified is obtained. The CAS data is the styling data of the whole vehicle development stage, which is provided by the styling engineer. In the early stage of vehicle development, the styling will change many times, that is, multiple versions of CAS data will be released, so the existing technology usually does not use CAS data for subsequent calculations or verifications. However, with the accelerated iteration speed of vehicle model development, the cumbersome and inefficient problems of the traditional method of modeling first and then verifying have gradually become prominent. Therefore, this embodiment proposes to adopt a verification method based on CAS data, which does not require additional modeling, and can quickly obtain the opening rate of each front-end module based on the current CAS data, and can further assist in guiding the development of the whole vehicle and improve the development efficiency of the whole vehicle styling and other stages.

[0035] In step 102, it is preferred to use software that automatically divides the grid for grid division, such as fluent, star-ccm and other software. It can also be based on Delaunay triangulation and other algorithms for grid division. After grid division, the coordinate data of each grid after division is extracted. Taking fluent as an example, all grid coordinates can be output by writing UDF. Taking the triangular grid as an example, the grid coordinates of a single grid are in the following form: {(x1, y1, z1), (x2, y2, z2), (x3, y3, z3)}. Aggregate the coordinates of all grids to obtain the data set. In order to ensure the accuracy of the later output, the grid size is preferably 1mm-2mm, so as to ensure that the features at the grid are retained to the greatest extent.

[0036] Map the coordinates of all grids in the data set to the first reference plane. Considering that the front-end module mainly takes in air through the X-direction, in order to realize the verification of the opening rate, the first reference plane here is the X-direction plane, and each grid is mapped to the X-direction plane. The X-direction here is defined based on the vehicle coordinate system commonly used in this field, that is, the X-axis is parallel to the ground and points to the front of the vehicle, the Z-axis points to the top of the vehicle, and the Y-axis points to the left side of the driver. Mapping the grid to the X-direction plane can be achieved by modifying the x-coordinate of each vertex in the grid to the same value. For example, if the coordinates of a grid are {(1,2,3), (2,4,5), (3,6,7)}, the x-coordinate of the coordinate can be changed to 0, that is, the mapped coordinates are {(0,2,3), (0,4,5), (0,6,7)}. All grids are mapped to the X-direction plane to obtain the first data set, which contains the coordinates of each vertex after all grids are mapped.

[0037] In step 103, the front-end module is also mapped to the first reference plane, and the vertex coordinates of the front-end module are input to obtain the mapping area of ​​the front-end module on the first reference plane. Considering the use and production requirements, the front-end module is usually a regular shape, and the projection of the front-end module on the first reference plane is usually a regular square structure. Taking the front-end module as a centrally set square structure as an example, assuming that after the front-end module is mapped to the X-plane, its vertex coordinates are {(0,-100,0), (0,100,0), (0,-100,200), (0,100,200)}, and the area surrounded by the four vertices is the mapping area of ​​the front-end module on the first reference plane. The coordinates of each grid in the first data set are traversed to determine whether each grid is in the mapping area, and the grids in the mapping area are extracted to form a second data set.

[0038] Considering that there may be a mesh that is not completely contained in the mapping area, that is, one or two of the vertex coordinates of the mesh are within the mapping area, and the coordinates of the remaining vertices are outside the mapping area, the coordinates of the mesh need to be corrected, and the coordinate values ​​that exceed the mapping area are corrected to the coordinate values ​​at the boundary of the mapping area. For example, if there is a mesh with coordinates of {(0,-101,199), (0,-99,198), (0,-99,197)}, the mesh coordinates are corrected to {(0,-100,199), (0,-99,198), (0,-99,197)} and added to the second data set.

[0039] In step 104, the area of ​​each mesh in the second data set is calculated. Taking a triangular mesh as an example, the area of ​​a triangle formed by three vertices is calculated based on the coordinates of the three vertices of each mesh. For the mesh {(0, y1, z1), (0, y2, z2), (0, y3, z3)}, its area S1 can be calculated using the following formula:

[0040] S1=(y1×z2-y1×z3+y2×z3-y2×z1+y3×z1-y3×z2) / 2.

[0041] The areas of each grid are accumulated to obtain the sum of the areas of each grid in the second data set S all , S all That is, the area of ​​CAS data contained in the mapping area of ​​the front-end module on the first reference plane. At the same time, according to the coordinates of the mapping area of ​​the front-end module on the first reference plane, the area S of the front-end module can be calculated. mk , through S all The area S of the front-end module mk , through R mk =(S mk -S all ) / S mk The aperture ratio of the front-end module can be obtained, such as Figure 2 shown.

[0042] A vehicle may include multiple front-end modules, such as an oil cooler, a low-temperature radiator, an intercooler, a condenser, a high-temperature radiator, etc., and the composition forms of different front-end modules may also be different. Therefore, in step 103, when there are multiple front-end modules, each front-end module is mapped to the first reference plane, and the second database corresponding to each front-end module is obtained, so as to calculate the opening ratio corresponding to each front-end module. Figure 3 As shown, a certain vehicle model has low-temperature radiator 1, oil cooler 2, condenser 3, and high-temperature radiator 4 arranged in sequence in the front cabin, and the opening ratio of the four structures needs to be checked separately.

[0043] In addition, in some embodiments, it also includes obtaining the grille opening form of the vehicle. According to the obtained second data set, the three vertices of each grid in the second data set are connected to obtain the connection lines between the vertices, and the connection lines between the vertices of all grids are analyzed to screen out the non-overlapping connection lines, and the connection lines correspond to the opening form of the vehicle grille. Since the second data set corresponds to a continuous surface, the edges of each grid inside the continuous surface correspond to two adjacent grids, and at the edge of the continuous surface, the edge of the grid corresponds to only one grid, and there is no grid corresponding to the area on the other side where there is no continuous surface, so the vertices of all grids are connected respectively to obtain the three edges corresponding to each grid, and then all the obtained edges are screened, and the overlapping data (i.e., the edges inside the continuous surface) are deleted, and the non-overlapping data are retained, so the contour at the edge of the grille opening can be obtained, and compared with the grille opening form pre-stored in the database, the grille opening form corresponding to the CAS data can be obtained. At this stage, a visual picture can be made to draw the grille state at this time, and the grille form can also be judged by the data continuity.

[0044] Figure 4is a structural block diagram of a front-end module aperture ratio calibration system 200 provided in an embodiment of the present disclosure, such as Figure 4 As shown, the system includes: a data acquisition module 201, a grid division module 202, a front-end module mapping module 203, and a verification module 204.

[0045] The data acquisition module 201 is configured to acquire CAS data of the vehicle to be verified;

[0046] A grid division module 202 is configured to perform grid division on the CAS data, and map the divided grids onto a first reference plane to obtain a first data set;

[0047] The front-end module mapping module 203 is configured to map the front-end module onto the first reference plane, obtain a mapping area of ​​the front-end module on the first reference plane, obtain a grid in the mapping area in the first data set, and form a second data set;

[0048] The checking module 204 is configured to calculate the aperture ratio of the front-end module according to the area of ​​the grid in the second data set.

[0049] It should be noted that: the front-end module aperture ratio calibration system 200 provided in the above embodiment only uses the division of the above functional modules as an example when performing aperture ratio calibration. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the front-end module aperture ratio calibration system 200 provided in the above embodiment and the front-end module aperture ratio calibration method embodiment belong to the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0050] Figure 5 is a structural block diagram of an electronic device provided by an embodiment of the present disclosure. Figure 5 As shown, the electronic device 300 may be a vehicle-mounted computer, etc. The electronic device 300 includes: a processor 301 and a memory 302 .

[0051] The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 301 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and LA (Programmable Logic Array). The processor 301 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 301 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 301 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0052] The memory 302 may include one or more computer-readable media, which may be non-transitory. The memory 302 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable medium in the memory 302 is used to store at least one computer program, which is used to be executed by the processor 301 to implement a front-end module aperture ratio calibration method provided in an embodiment of the present disclosure.

[0053] Those skilled in the art will understand that Figure 3 The structure shown in the figure does not constitute a limitation on the electronic device 300, and may include more or less components than those shown in the figure, or combine some components, or adopt a different component arrangement.

[0054] The embodiment of the present disclosure also provides a computer-readable storage medium for storing computer instructions. When the computer instructions are executed by a processor, the steps of a front-end module aperture ratio calibration method provided in the embodiment of the present disclosure can be completed.

[0055] The embodiment of the present disclosure further provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the steps of a front-end module aperture ratio calibration method provided in the embodiment of the present disclosure.

[0056] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method for checking the aperture ratio of a front-end module, characterized in that: include: Obtain CAS data of the vehicle to be verified; Gridding the CAS data, and mapping the gridded data onto a first reference plane to obtain a first data set; Mapping the front-end module onto the first reference plane to obtain a mapping area of ​​the front-end module on the first reference plane, and obtaining a grid in the mapping area from the first data set to form a second data set; The aperture ratio of the front-end module is calculated according to the area of ​​the grid in the second data set.

2. A front-end module aperture ratio verification method as claimed in claim 1, characterized in that: The CAS data is divided into a plurality of triangular meshes, the coordinates of each mesh are recorded, and the divided meshes are mapped onto the first reference plane according to the coordinates.

3. A front-end module aperture ratio verification method as claimed in claim 2, characterized in that: The first reference plane is an X-direction plane.

4. A front-end module aperture ratio verification method according to claim 1, characterized in that: If the coordinates of any mesh vertex in the first data set are not completely within the mapping area, the vertex coordinates of the mesh are corrected.

5. A front-end module aperture ratio verification method as claimed in claim 1, characterized in that: According to the coordinates of the grids in the second data set, the area of ​​each grid is calculated, and the total area of ​​the CAS data contained in the second data set is accumulated. According to the total area and the mapping area area of ​​the front-end module on the first reference plane, the opening ratio of the front-end module is calculated.

6. A front-end module aperture ratio verification method according to claim 1, characterized in that: It also includes obtaining the grille opening form, specifically including: Obtaining the connection lines between each vertex of each mesh in the second data set; Delete the overlapping lines and keep the non-overlapping lines. The outline formed by the retained lines is the grille opening outline. The grille opening form is determined according to the grille opening contour.

7. A front-end module aperture ratio verification system, characterized in that: include: A data acquisition module, configured to acquire CAS data of a vehicle to be verified; A grid division module is configured to perform grid division on the CAS data, and map the divided grids onto a first reference plane to obtain a first data set; A front-end module mapping module is configured to map the front-end module onto a first reference plane, obtain a mapping area of ​​the front-end module on the first reference plane, obtain a grid in the mapping area from the first data set, and form a second data set; The checking module is configured to calculate the aperture ratio of the front-end module according to the area of ​​the grid in the second data set.

8. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to complete the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: Used to store computer instructions, which, when executed by a processor, complete the steps of the method according to any one of claims 1 to 6.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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