New energy automobile whole car sunlight simulation system

Abstract

A new energy vehicle whole vehicle sunlight simulation system, comprising: a modeling module, modeling a test scene to obtain a scene model, wherein the created model at least includes a site geometry and a vehicle geometry, and the site geometry includes a metal halide lamp module; a division module, dividing the vehicle geometry into a plurality of irradiation areas, wherein each irradiation area corresponds to at least one metal halide lamp module; and an irradiation scheme generation module, generating an irradiation scheme corresponding to the metal halide lamp module according to the characteristics of the irradiation area and the irradiance requirement. The new energy vehicle whole vehicle sunlight simulation system divides the vehicle body into different irradiation areas, gives the corresponding irradiation scheme according to the characteristics of the irradiation area, improves the overall test efficiency and accuracy, and has high test result recognition degree.

Description

Technical Field

[0001] This invention relates to the field of vehicle testing technology, and in particular to a sunlight simulation system for a new energy vehicle. Background Technology

[0002] Vehicle aging testing is an indispensable and crucial part of automotive research and development and quality control. It simulates the environmental stresses that a vehicle experiences throughout its entire lifespan, such as sunlight, temperature, and humidity, in a laboratory setting. This allows for the rapid assessment of the durability of materials and components, ensuring that the vehicle maintains stable appearance and function over a lifespan of 10-15 years.

[0003] For sunlight simulation, ensuring consistent irradiance across all parts of the vehicle under test is the core requirement. Since the vehicle body is a complex three-dimensional curved surface, in order to ensure consistent irradiance, technicians often rely on past experience to make a preliminary arrangement of the test lights, and then adjust the arrangement based on the data monitored by the irradiance sensor. This method reduces the overall testing efficiency and the overall accuracy is relatively low, resulting in low acceptance of the test report. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a whole-vehicle sunlight simulation system for new energy vehicles, which divides the vehicle body into different irradiation areas and provides corresponding irradiation schemes based on the characteristics of the irradiation areas, thereby improving the overall testing efficiency and accuracy and resulting in highly acceptable test results.

[0005] This invention provides a whole-vehicle sunlight simulation system for new energy vehicles, comprising:

[0006] The modeling module is used to model the test scenario to obtain a scenario model, wherein the scenario model includes at least a site geometry and a vehicle geometry, and the site geometry includes a metal halide lamp module.

[0007] A division module is used to divide the vehicle geometry into several illumination areas, wherein each illumination area corresponds to at least one metal halide lamp module.

[0008] The irradiation scheme generation module is used to generate an irradiation scheme corresponding to the metal halide lamp module based on the characteristics of the irradiation area and the irradiance requirements.

[0009] In one embodiment, the modeling module includes:

[0010] The scanning submodule is used to perform high-density multi-angle scanning of the test scene to obtain point cloud data;

[0011] The classification submodule is used to classify the point cloud data;

[0012] Build submodules for modeling based on classification results.

[0013] In one embodiment, the partitioning module includes:

[0014] The mesh generation submodule is used to perform mesh generation on the vehicle geometry to obtain several mesh primitives;

[0015] The illumination area division submodule is used to obtain the feature parameters of the grid primitive and divide the grid primitive into several illumination areas according to the feature parameters.

[0016] In one embodiment, the irradiation area division submodule includes:

[0017] The acquisition unit is used to acquire the feature parameters of the grid primitive, wherein the feature parameters include slope, aspect, height and first coordinate position;

[0018] The dividing unit is used to determine whether the slope and aspect of the grid elements are consistent.

[0019] Given a consistent slope and aspect, determine whether the heights of the grid elements are consistent.

[0020] Given a high degree of consistency, determine whether the first coordinate positions of the grid elements are adjacent.

[0021] When the first coordinate positions of the grid elements are adjacent, the grid elements are divided into an illumination area.

[0022] In one embodiment, the irradiation scheme generation module includes:

[0023] The position acquisition submodule is used to acquire the second coordinate position corresponding to the metal halide lamp module and the third coordinate position corresponding to the irradiation area.

[0024] The distance calculation submodule is used to calculate the distance between the second coordinate position and the third coordinate position in sequence;

[0025] A pairing submodule is used to pair the metal halide lamp module with the smallest distance with the irradiation area;

[0026] The scheme generation submodule is used to generate a corresponding irradiation scheme based on the characteristic parameters, irradiance and distance of the irradiation area.

[0027] In one embodiment, the calculation formula for the scheme generation submodule is expressed as follows:

[0028] ,

[0029] Among them, Gtarget For the target irradiance, I total The total intensity of the light source, The zenith angle of the light source for the metal halide lamp module. This refers to the azimuth angle of the light source in the metal halide lamp module. The slope of the irradiated area, The slope of the irradiated area, This is the minimum distance between the metal halide lamp module and the irradiated area.

[0030] In one embodiment, the new energy vehicle whole-vehicle sunlight simulation system further includes:

[0031] The irradiance acquisition array module is used to acquire the irradiance intensity of each irradiated area and feed it back to the irradiation scheme generation module.

[0032] In one embodiment, the test scenario includes a cabin, a track, a drive mechanism, and a metal halide lamp module. The top of the cabin is dome-shaped, and the moving track is located at the dome-shaped position. The drive mechanism is mounted on the moving track to drive the metal halide lamp module to move along the track. The metal halide lamp module is slidably mounted on the track.

[0033] The new energy vehicle whole vehicle sunlight simulation system provided by this invention divides the vehicle body into different irradiation areas and provides corresponding irradiation schemes according to the characteristics of the irradiation areas, thereby improving the overall testing efficiency and accuracy and the test results have high acceptance. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 The system block diagram of the new energy vehicle sunlight simulation system provided by the present invention.

[0036] Figure 2 This is a schematic diagram of the test scenario for the new energy vehicle whole vehicle sunlight simulation system provided by the present invention. Detailed Implementation

[0037] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. Based on the description of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0039] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0040] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0041] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0042] Please see Figure 1 The new energy vehicle sunlight simulation system provided by this invention includes:

[0043] Modeling module 1 models the test scenario to obtain a scenario model, wherein the scenario model includes at least the site geometry and vehicle geometry, and the site geometry includes metal halide lamp modules.

[0044] It is known that modeling module 1 may further include:

[0045] The scanning submodule is used to perform high-density, multi-angle scanning of the test scene to obtain point cloud data.

[0046] It is understandable that laser scanning can be used to acquire the data. High density and multiple angles can be understood as ensuring a sufficient number of points and directions during the scanning process, thereby ensuring the completeness and accuracy of the acquired test scene.

[0047] The classification submodule is used to classify point cloud data.

[0048] It is known that point cloud data can be classified based on machine learning or deep learning. Classification facilitates subsequent targeted modeling and the removal of irrelevant point cloud data.

[0049] Build submodules for modeling based on classification results.

[0050] Understandably, BIM can be used to model the site geometry, Poisson reconstruction algorithm can be used to model the vehicle geometry, and parametric modeling algorithm can be used to model metal halide lamp modules, etc. The geometry obtained above is then fused together, including a unified coordinate system and hierarchical organization, to obtain the final scene model.

[0051] The segmentation module 2 divides the vehicle geometry into several illumination areas, where each illumination area corresponds to at least one metal halide lamp module.

[0052] It can be known that module 2 can include:

[0053] The mesh generation submodule is used to mesh the vehicle geometry to obtain several mesh primitives.

[0054] Understandably, the vehicle geometry is meshed, and the mesh can be triangular or quadrilateral. The surface of the vehicle geometry is meshed to obtain several mesh primitives.

[0055] The illumination area division submodule obtains the feature parameters of the grid primitives and divides the grid primitives into several illumination areas based on the feature parameters.

[0056] It can be understood that the above module may further include:

[0057] The acquisition unit is used to acquire the feature parameters of the grid primitives, including slope, aspect, height, and first coordinate position.

[0058] It is known that the slope and aspect are based on the horizontal plane, the height is based on the ground plane, and the first coordinate position can be the vertex coordinate set of the grid primitive.

[0059] Divide the grid into units and determine whether the slope and aspect are consistent between grid elements.

[0060] Given a consistent slope and aspect, determine whether the heights of the grid elements are consistent.

[0061] Given a high degree of consistency, determine whether the first coordinate positions of the grid primitives are adjacent.

[0062] When the first coordinate positions of the grid primitives are adjacent, several grid primitives are divided into an illumination area.

[0063] Understandably, when dividing the grid, the grid elements can be initially divided based on the slope and aspect. That is, the grid elements with the same slope and aspect are divided into the first set of grid elements. The same slope and aspect can be understood as the difference between the slope of the grid element and the dividing standard slope is within a preset range, and the difference between the aspect and the dividing standard aspect is also within a preset range. The values ​​of the dividing standard slope and the dividing standard aspect can be selected based on the vehicle parameters.

[0064] Next, the first set of grid primitives is divided, and the height data of the grid primitives is compared with the division standard height value. Grid primitives whose difference from the division standard height value is within a preset range form the second set of grid primitives. The division standard height value is selected based on the allowable irradiance difference, which is the difference between the actual irradiance and the target irradiance.

[0065] Then, the second set of grid primitives is divided, and one grid primitive is randomly selected from the second set of grid primitives. This grid primitive can be used as the reference grid primitive. The grid primitives in the second set of grid primitives are traversed to search for grid primitives that share vertex coordinates with the reference grid primitive, that is, adjacent grid primitives. A shared vertex can be understood as at least one of the vertex coordinates of the adjacent grid primitives being consistent with the vertex coordinates of the reference grid primitive. Then, the above steps are repeated to search for grid primitives that share vertex coordinates with adjacent grid primitives, and so on, until the illumination area is formed.

[0066] The purpose of the above division is mainly to divide the front area, side area, top area and rear area of ​​the vehicle into the same corresponding illumination area.

[0067] Irradiation scheme generation module 3 generates irradiation schemes for the corresponding metal halide lamp modules based on the characteristics of the irradiated area and the irradiance requirements.

[0068] It can be understood that the aforementioned irradiation scheme generation module 3 may further include:

[0069] The position acquisition submodule is used to acquire the second coordinate position corresponding to the metal halide lamp module and the third coordinate position corresponding to the irradiation area.

[0070] It is understandable that the second coordinate position of the metal halide lamp module can be the center coordinate point of the lamp bead of the metal halide lamp module, and the third coordinate position of the irradiation area can be the coordinates of the center point of the irradiation area.

[0071] The distance calculation submodule is used to calculate the distance between the second coordinate position and the third coordinate position in sequence.

[0072] The pairing submodule is used to pair the metal halide lamp modules with the smallest distance and the irradiation area.

[0073] It is understandable that the position of each metal halide lamp module is not fixed. It can move on an arc-shaped track on the top of the cabin. Each metal halide lamp module has its own range of movement. Therefore, the second coordinate position of each metal halide lamp module is not fixed. It can be discretely sampled within its range of movement, and the distance between the sampling point and the third coordinate position is calculated in turn. The minimum distance is found, and Newton's method is used to find the final minimum distance near the sampling point with the minimum distance. In the same way, the minimum distance between each metal halide lamp module and the irradiation area is calculated in turn. The metal halide lamp module with the smallest distance is selected and paired with the irradiation area. In many cases, the irradiation range of the metal halide lamp module can cover the irradiation area.

[0074] The scheme generation submodule is used to generate corresponding irradiation schemes based on the characteristic parameters, irradiance, and distance of the irradiated area.

[0075] It is known that the irradiation plan can be calculated based on the following formula:

[0076]

[0077] Among them, G target For the target irradiance, I total The total intensity of the light source, The zenith angle of the light source for the metal halide lamp module. This refers to the azimuth angle of the light source in the metal halide lamp module. The slope of the irradiated area, The slope of the irradiated area, This is the minimum distance between the metal halide lamp module and the irradiated area.

[0078] Understandably, the target irradiance data is set according to the test requirements during irradiation, and therefore can be considered known. When irradiating, the metal halide lamp module will adjust to the vertical irradiation area of ​​the light source, and at the same time, it will also adjust to the position with the minimum distance from the irradiation area. That is, the zenith angle, azimuth angle, and minimum distance of the light source are also known. Therefore, the total intensity of the light source can be calculated. After obtaining the total intensity of the light source, while ensuring the consistency of the wavelength of the metal halide lamp module, the metal halide lamp module can control the input power through PID control to obtain the required total intensity of the light source.

[0079] Please see Figure 2 In some embodiments, the new energy vehicle whole-vehicle sunlight simulation system further includes:

[0080] The irradiance acquisition array module is used to collect the irradiance intensity of each irradiated area and feed it back to the irradiation scheme generation module.

[0081] Understandably, the irradiance data can be deployed at key horizontal surfaces, vertical / complex curved surfaces, and three-dimensional spatial points on the vehicle body. The monitored irradiance data is then fed back to the irradiance scheme generation module 3. The irradiance scheme generation module adjusts the total intensity of the light source based on the feedback results to achieve the target irradiance.

[0082] Please continue reading Figure 2 In some embodiments, the test scenario includes a cabin 4, a track, a drive mechanism, and a metal halide lamp module 5. The top of the cabin 4 is dome-shaped, and the moving track is arranged at the dome-shaped position. The drive mechanism is mounted on the moving track to drive the metal halide lamp module 5 to move along the track. The metal halide lamp module 5 is slidably mounted on the track.

[0083] It is known that the drive mechanism may include a rack set on the side of the track, and a motor with gears is mounted on the metal halide lamp module 5. The motor drives the gear to rotate, and the gear meshes with the rack, thereby driving the metal halide lamp module to move along the track. After moving to the appropriate position, the motor self-locks, thereby ensuring the stability of the metal halide lamp module 5.

[0084] As described above, the new energy vehicle whole-vehicle sunlight simulation system provided by this invention divides the vehicle body into different irradiation areas and provides corresponding irradiation schemes based on the characteristics of the irradiation areas, thereby improving the overall testing efficiency and accuracy and resulting in highly acceptable test results.

[0085] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A sunlight simulation system for a new energy vehicle, characterized in that, include: The modeling module is used to model the test scenario to obtain a scenario model, wherein the scenario model includes at least a site geometry and a vehicle geometry, and the site geometry includes a metal halide lamp module. A division module is used to divide the vehicle geometry into several illumination areas, wherein each illumination area corresponds to at least one metal halide lamp module. The irradiation scheme generation module is used to generate an irradiation scheme corresponding to the metal halide lamp module based on the characteristics of the irradiation area and the irradiance requirements.

2. The new energy vehicle whole-vehicle sunlight simulation system as described in claim 1, characterized in that, The modeling module includes: The scanning submodule is used to perform high-density multi-angle scanning of the test scene to obtain point cloud data; The classification submodule is used to classify the point cloud data; Build submodules for modeling based on classification results.

3. The new energy vehicle whole-vehicle sunlight simulation system as described in claim 2, characterized in that, The partitioning module includes: The mesh generation submodule is used to perform mesh generation on the vehicle geometry to obtain several mesh primitives; The illumination area division submodule is used to obtain the feature parameters of the grid primitive and divide the grid primitive into several illumination areas according to the feature parameters.

4. The new energy vehicle whole-vehicle sunlight simulation system as described in claim 3, characterized in that, The irradiation area division submodule includes: The acquisition unit is used to acquire the feature parameters of the grid primitive, wherein the feature parameters include slope, aspect, height and first coordinate position; The dividing unit is used to determine whether the slope and aspect of the grid elements are consistent. Given a consistent slope and aspect, determine whether the heights of the grid elements are consistent. Given a high degree of consistency, determine whether the first coordinate positions of the grid elements are adjacent. When the first coordinate positions of the grid elements are adjacent, the grid elements are divided into an illumination area.

5. The new energy vehicle whole-vehicle sunlight simulation system as described in claim 4, characterized in that, The irradiation scheme generation module includes: The position acquisition submodule is used to acquire the second coordinate position corresponding to the metal halide lamp module and the third coordinate position corresponding to the irradiation area. The distance calculation submodule is used to calculate the distance between the second coordinate position and the third coordinate position in sequence; A pairing submodule is used to pair the metal halide lamp module with the smallest distance with the irradiation area; The scheme generation submodule is used to generate a corresponding irradiation scheme based on the characteristic parameters, irradiance and distance of the irradiation area.

6. The new energy vehicle whole-vehicle sunlight simulation system as described in claim 5, characterized in that, The calculation formula for the scheme generation submodule is expressed as follows: 、 Among them, G target For the target irradiance, I total The total intensity of the light source, The zenith angle of the light source for the metal halide lamp module. This refers to the azimuth angle of the light source in the metal halide lamp module. The slope of the irradiated area, The slope of the irradiated area, This is the minimum distance between the metal halide lamp module and the irradiated area.

7. The new energy vehicle whole-vehicle sunlight simulation system as described in claim 1, characterized in that, The new energy vehicle whole vehicle sunlight simulation system also includes: The irradiance acquisition array module is used to acquire the irradiance intensity of each irradiated area and feed it back to the irradiation scheme generation module.

8. The new energy vehicle whole-vehicle sunlight simulation system as described in claim 1, characterized in that, The test scenario includes a cabin, a track, a drive mechanism, and a metal halide lamp module. The top of the cabin is dome-shaped, and the moving track is located at the dome-shaped position. The drive mechanism is mounted on the moving track to drive the metal halide lamp module to move along the track. The metal halide lamp module is slidably mounted on the track.

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