Sunlight focusing direction searching method and system based on CATIA
By building a 3D model of the lens and surrounding parts in CATIA and using an irradiation sensor to identify the focusing direction of sunlight, the problem of overheating or deformation of the lens's surrounding parts is solved, improving design efficiency and accuracy, and supporting template reuse.
Patent Information
- Application Number
- CN202511618161.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-06
- Publication Date
- 2026-02-27
AI Technical Summary
In existing automotive lighting design, the peripheral components of the lens may overheat or deform due to sunlight focusing, and the thermal analysis methods are cumbersome and time-consuming.
By constructing a 3D model of the lens and surrounding parts in CATIA, irradiance is detected using first and second irradiance sensors, the irradiance ratio is calculated, focusing risks are identified, and the focusing direction is identified by defining the properties of the solar light source plane through SPEOS.
It improves the accuracy of identifying the risk of sunlight focusing in lens design and the design efficiency, reduces the time spent on repeated modeling, and supports the reuse of templates for different projects.
Smart Images
Figure CN121580593A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of lamp design, and provides a sunlight focusing direction finding method and system based on CATIA. BACKGROUND
[0002] In modern automobile lamp structure design, especially in the high / low beam function module of a front headlamp, a lens is widely used. However, in the optical design process, the lens may have a focusing risk, that is, sunlight is focused on the parts around the lens through the lens. This phenomenon may cause the parts around the lens to be overheated, deformed or discolored, thereby affecting the appearance, function and safety of the lamp.
[0003] In order to eliminate this risk, the early development of an automobile lamp usually needs to use a thermal analysis software to analyze the heat distribution of the parts around the lens under sunlight irradiation in different directions. If it is found that sunlight in some directions may cause overheating or other problems, a designer will eliminate the thermal risk by changing the material, surface treatment or position of the parts around the lens and the like.
[0004] The existing thermal analysis method usually needs to simulate each sunlight direction separately, and this process is not only extremely tedious but also time-consuming. SUMMARY
[0005] In view of this, the application provides a sunlight focusing direction finding method based on CATIA, which aims to improve the above problems.
[0006] Specifically, the technical scheme comprises the following: On the one hand, the application embodiment provides a sunlight focusing direction finding method based on CATIA, and the method specifically comprises the following steps: (1) constructing a three-dimensional model of a lens and a three-dimensional model of parts arranged around the lens; (2) reading a sunlight source model, a sunlight source plane in the sunlight source model is incident on the lens at different azimuth angles, and a current incident azimuth angle of sunlight is selected; (3) collecting a maximum irradiance value on the parts around the lens under the current incident azimuth, and calculating a ratio of the maximum irradiance value to a reference irradiance when sunlight is directly incident in a non-focusing state; (4) when the ratio is greater than or equal to a set ratio threshold value, it is determined that the sunlight at the current azimuth angle has a focusing risk; (5) changing the current incident azimuth angle of the sunlight, executing step (3) until all azimuth angles in the sunlight source plane of the sunlight source are traversed, and an azimuth angle with the maximum ratio in the focusing risk is determined as the sunlight focusing direction of the lens.
[0007] In some embodiments of the present application, the first irradiance sensor detects the reference irradiance, the first irradiance sensor is arranged on the reference irradiance plane, the reference irradiance plane is a plane of the solar light source plane perpendicular to an incident azimuth angle created by the lens surface, and the first irradiance sensor only detects the irradiance of the solar light source plane incident perpendicularly to the reference irradiance plane.
[0008] In some embodiments of the present application, the second sensor is arranged on the part surface to detect the irradiance on the part around the lens under different incident azimuths.
[0009] In some embodiments of the present application, the construction method of the solar light source model is as follows: The parallel light source of the solar light source model is equivalent to the solar light plane with different azimuth angles. The acquisition method of the solar light source plane with different azimuth angles is as follows: The rectangular light source plane of the solar light is created, and the solar light source plane under different azimuths is formed by rotation, and the light fluxes of all the solar light source planes are the same.
[0010] In some embodiments of the present application, the constructed solar light source model is saved.
[0011] In some embodiments of the present application, the three-dimensional model of the lens, the three-dimensional model of the part and the solar light source model are constructed in CATIA.
[0012] In some embodiments of the present application, SPEOS is embedded in CATIA, the solar light source plane with different azimuth angles is established in CATIA, and the properties of the solar light source plane, including the light flux, are defined in SPEOS.
[0013] On the other hand, the embodiments of the present application provide a solar light focusing direction finding system based on CATIA, which comprises: The first irradiance sensor and the second irradiance sensor, a processor in communication connection with the first irradiance sensor and the second irradiance sensor, and a memory connected with the processor; wherein the memory stores a solar light source model; The first irradiance sensor is used to collect the reference irradiance ratio when the solar light source plane is directly irradiated in a non-focusing state, and send it to the processor; The second irradiance sensor is used to collect the irradiance of the solar light source plane on the part around the lens under different incident azimuths, and send it to the processor; The processor determines the solar focusing direction of the lens based on the above solar light focusing direction finding method based on CATIA.
[0014] In some embodiments of the present application, SPEOS is embedded in CATIA, a solar light source plane of different azimuth angles is established in CATIA, and the properties of the solar light source plane are defined in SPEOS, including light flux.
[0015] The lens solar light focusing risk checking method based on SPEOS can effectively identify possible solar light focusing risks in lens design, so that measures can be taken in advance to optimize the design and avoid heat accumulation or equipment damage caused by solar light focusing; by reusing the solar light source model, the time for repeated modeling and calculation is reduced, and the design efficiency is improved; by accurate ray tracing and irradiance analysis, the identification accuracy of the focusing direction is improved; template reuse between different projects is supported, which facilitates the response to different design requirements. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0017] Figure 1 A flowchart of a solar light focusing direction finding method based on CATIA is provided for the embodiments of the present application; Figure 2 A structural schematic diagram of a solar light focusing direction finding system based on CATIA is provided for the embodiments of the present application; The above drawings have shown the specific embodiments of the present application, which will be described in more detail in the following. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present application will be described clearly and completely in the following by combining the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0019] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as generally understood by those skilled in the art.
[0020] Figure 1 A flowchart of a solar light focusing direction finding method based on CATIA is provided for the embodiments of the present application, and the method is as follows: (1) Constructing the three-dimensional model of the lens and the three-dimensional model of the parts arranged around the lens, arranging the second irradiation sensor on the surface of the parts; In the embodiment of the present application, SPEOS is embedded in CATIA. First, a lens module is created in CATIA, the lens module includes two components, including a lens and a part around the lens, the three-dimensional model of the lens and the three-dimensional model of the part around the lens are created, the lens data is added by using the Add command, the surface data of the part around the lens is joined by using the Join command, the lens is given actual material properties (for example, refractive index, transmittance, etc.) by SPEOS, and the surface of the part around the lens is given arbitrary material properties.
[0021] (2) Reading the solar light source model, the solar light source plane in the solar light source model is incident on the lens at different azimuth angles, and the current incident azimuth angle of the solar light is selected; The parallel light source of the equivalent solar light is adopted by the present application, and the obtaining method of the solar light source plane at different azimuth angles is as follows: A rectangular light source plane of the solar light is created in CATIA, different azimuth angle solar light source planes are formed by rotation, the properties of the solar light source plane are defined in SPEOS, the light fluxes of all the solar light source planes are defined to be the same, and are all set to 1 lm; a rectangular light source plane is created in front of the lens, and the recommended size is slightly larger than the size of the lens, a plurality of solar light source planes at different azimuth angles are created by rotation. The center point of the lens is taken as the origin of the lens coordinate system, the three-axis directions of the vehicle coordinate system are taken as the three-axis directions of the lens coordinate, 19 azimuth angles (0° to 90°, every 5° as an azimuth angle) are generated around the y-axis, 37 collimated light sources at different azimuth angles are generated around the z-axis, and a total of 703 light source planes at different azimuth angles are generated. The parallel light sources are used to simulate the solar light irradiation at different azimuth angles, so as to ensure that different incident angles are covered.
[0022] In the embodiment of the present application, the reference irradiance plane is a plane perpendicular to a solar light source plane at an azimuth angle, which is created on the surface of the lens, the size of the reference irradiance plane is set to be able to receive only the solar light source plane incident at the corresponding azimuth angle, and the reference irradiance plane is used to collect the solar irradiance in the unfocused state of the lens, that is, the reference irradiance value. Since the reference irradiance incident on the lens from different azimuth angles is the same, the reference irradiance plane and the first irradiation sensor arranged on the reference irradiance plane are set for any one azimuth angle, and the size of the first irradiation sensor is the same as that of the reference irradiance plane.
[0023] Based on the reference illumination surface of the lens surface and the parts around the lens, two 3D irradiation sensors are created, which are called first irradiation sensor and second irradiation sensor respectively, the first irradiation sensor is used to perceive the solar irradiance of the direct sunlight on the lens surface, and the second irradiation sensor is used to perceive the irradiance on the curved surface of the parts around the lens after refraction or reflection through the lens, the second irradiation sensor covers the surface area of the parts around the lens, so as to detect the distribution of focused energy.
[0024] (3) Collecting the maximum irradiance on the parts around the lens under the current incident orientation, calculating the ratio of the maximum irradiance to the reference irradiance when the sunlight is directly incident in the non-focusing state; (4) When the ratio is greater than or equal to the set ratio threshold, it is determined that the sunlight at the current azimuth angle has a focusing risk, and if the ratio is less than the set ratio threshold, it is determined that the sunlight at the current azimuth angle has no focusing risk; (5) Changing the current incident azimuth angle of the sunlight, executing step (3) until all azimuth angles in the sunlight emission plane of the sunlight source are traversed, and the azimuth angle with the maximum ratio in the focusing risk is determined as the focusing direction of the lens.
[0025] In the embodiment of the application, the focusing direction of the lens is determined based on the ratio of the maximum irradiance perceived by the second irradiation sensor under different incident azimuth angles to the reference irradiance, therefore, reference simulation and different azimuth angle simulation are needed to determine the reference irradiance and the maximum irradiance under different incident azimuth angles; Reference simulation: for the incident azimuth angle perpendicular to the reference illumination surface, the number of light rays used in simulation is not less than 1e8, and the irradiance value currently perceived by the first irradiation sensor is the reference irradiance.
[0026] Different azimuth angle simulation: for each azimuth angle, the number of light rays used in simulation is not less than 1e8, the maximum irradiance perceived by the second irradiation sensor under the current incident azimuth angle is obtained, and through the above simulation of different azimuth angles, the irradiation energy distribution of the lens part region under each azimuth angle is obtained.
[0027] In order to facilitate the rapid analysis of the focusing direction of different lens modules, the constructed sunlight source model is stored as a simulation tree and saved as a reusable template. In this way, the simulation tree can be directly called in subsequent projects, avoiding repeated creation of models and simulation. In the subsequent lens module, the lens center is fixed at the origin of the head lens coordinate system, and the lens is controlled to be located at the set pose in the lens coordinate system. At this time, the incident angle of the stored sunlight source model is consistent with the actual incident angle.
[0028] In the embodiment of the present application, the ratio threshold is set to 10, when the ratio of the maximum irradiance in the current incident orientation to the reference irradiance is less than 10, then there is no risk of sunlight focusing on the lens at this orientation angle, if the ratio of the maximum irradiance in the current incident orientation to the reference irradiance is equal to or equal to 10, then there is a risk of sunlight focusing on the lens at this orientation angle, and record and save; after traversing all the solar orientation angles, the orientation angle with the maximum ratio of the risk of sunlight focusing on the lens is taken as the solar focusing direction of the lens.
[0029] Figure 2 The structural schematic diagram of the solar light focusing direction finding system based on CATIA provided by the embodiment of the present application, only part related to the embodiment of the present application is shown for the convenience of description, and the system comprises: The first irradiation sensor and the second irradiation sensor, the processor in communication connection with the first irradiation sensor and the second irradiation sensor, the memory connected with the processor, wherein the memory stores the solar light source model; the first irradiation sensor is used for collecting the reference irradiance ratio when the solar light source plane is directly irradiated in the non-focusing state, and sending to the processor; the second irradiation sensor is used for collecting the irradiance of the solar light source plane on the lens surrounding parts in different incident orientations, and sending to the processor; the processor determines the solar focusing direction of the lens based on the above solar light focusing direction finding method.
[0030] The solar light focusing direction finding method or system based on CATIA provided by the present application has the following beneficial technical effects: The lens solar light focusing risk investigation method based on SPEOS can effectively identify the possible solar light focusing risk in the lens design, so as to take measures in advance to optimize the design and reduce the risk of heat accumulation or equipment damage caused by solar light focusing; by reusing the solar light source model, the time of repeated modeling and calculation is reduced, and the design efficiency is improved; by accurate ray tracing and irradiance analysis, the identification accuracy of the focusing direction is improved; different project templates are supported, which is convenient for coping with different design requirements.
[0031] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the application pertains. The specification and examples are to be regarded as illustrative only.
[0032] It should be understood that the present application is not limited to the precise construction which has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the present application. The scope of the present application is limited only by the appended claims.
Claims
1. A CATIA-based sunlight focusing direction finding method, characterized in that, The method is specifically as follows: (1) constructing a three-dimensional model of the lens and a three-dimensional model of the parts arranged around the lens; (2) reading a sunlight source model, the sunlight source plane in the sunlight source model is incident on the lens at different azimuth angles, and a current incident azimuth angle of the sunlight is selected; (3) collecting a maximum irradiance on the parts around the lens at the current incident azimuth, and calculating a ratio of the maximum irradiance to a reference irradiance when the sunlight source plane is directly incident in a non-focusing state; (4) when the ratio is greater than or equal to a set ratio threshold, it is determined that the sunlight at the current azimuth angle has a focusing risk; (5) changing the current incident azimuth angle of the sunlight, performing step (3), and until all azimuth angles in the sunlight source plane of the sunlight source are traversed, the azimuth angle with the maximum ratio in the focusing risk is determined as the solar focusing direction of the lens.
2. The CATIA-based sunlight focusing direction finding method of claim 1, wherein, The first irradiance sensor detects the reference irradiance, and the first irradiance sensor is arranged on a reference irradiance plane, which is a plane of the sunlight source plane perpendicular to an incident azimuth angle created on the lens surface, and the first irradiance sensor only detects the irradiance of the sunlight source plane incident on the reference irradiance plane.
3. The CATIA-based sunlight focusing direction finding method of claim 1, wherein, The second sensor is arranged on the surface of the part and is used to detect the irradiance on the parts around the lens at different incident azimuths.
4. The CATIA-based sunlight focusing direction finding method of claim 1, wherein, The construction method of the sunlight source model is specifically as follows: The sunlight source model is constructed by using sunlight source planes at different azimuth angles to equivalently represent parallel light sources of the sunlight, and the sunlight source model The method for obtaining the sunlight source planes at different azimuth angles is specifically as follows: A rectangular light source plane of the sunlight is created, and different sunlight source planes at different azimuths are formed by rotation, and the light fluxes of all the sunlight source planes are the same.
5. The CATIA-based sunlight focusing direction finding method of claim 4, wherein, The constructed sunlight source model is saved.
6. The CATIA-based sunlight focusing direction finding method of claim 1, wherein, The three-dimensional model of the lens, the three-dimensional model of the parts, and the sunlight source model are constructed in CATIA.
7. The CATIA-based sunlight focusing direction finding method of claim 4, wherein, SPEOS is embedded in CATIA, the sunlight source planes at different azimuth angles are established in CATIA, and the properties of the sunlight source planes, including the light flux, are defined in SPEOS. 8. A CATIA based sunlight focusing direction finding system characterized in that, The system comprises: The first irradiance sensor and the second irradiance sensor, a processor in communication connection with the first irradiance sensor and the second irradiance sensor, a memory connected with the processor, and the memory stores the sunlight source model; The first irradiance sensor is used to collect the ratio of the reference irradiance when the sunlight source plane is directly incident in the non-focusing state, and send it to the processor; The second irradiance sensor is used to collect the irradiance of the sunlight source plane on the parts around the lens at different incident azimuths, and send it to the processor; The processor determines the solar focusing direction of the lens based on the sunlight focusing direction finding method of any one of claims 1 to 7.
9. The CATIA based sunlight focusing direction finding system as claimed in claim 8, wherein, SPEOS is embedded in CATIA, the sunlight source planes at different azimuth angles are established in CATIA, and the properties of the sunlight source planes, including the light flux, are defined in SPEOS.