CN112767550A - Spatial target light scattering characteristic modeling method based on grid - Google Patents
Spatial target light scattering characteristic modeling method based on grid Download PDFInfo
- Publication number
- CN112767550A CN112767550A CN202110005181.7A CN202110005181A CN112767550A CN 112767550 A CN112767550 A CN 112767550A CN 202110005181 A CN202110005181 A CN 202110005181A CN 112767550 A CN112767550 A CN 112767550A
- Authority
- CN
- China
- Prior art keywords
- grid
- entity
- subdivision
- light scattering
- software
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/20—Finite element generation, e.g. wire-frame surface description, tesselation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Graphics (AREA)
- Geometry (AREA)
- Software Systems (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention provides a grid-based spatial target light scattering characteristic modeling method, which aims to solve the problem that the existing grid component processing method is not suitable for calculating the light scattering characteristic of a spatial target with a large-size grid component. The grid-based space target light scattering characteristic modeling method comprises the following steps: establishing a latticed entity model according to the external contour of the latticed entity of the space target; carrying out single-layer medium subdivision on the latticed solid model by using subdivision software; and setting reflection coefficients of different positions of the single-layer medium according to the sparsity of the grid on the grid-shaped entity to complete the modeling of the light scattering characteristics of the space target.
Description
Technical Field
The invention relates to the field of optics, in particular to a grid-based space target light scattering characteristic modeling method.
Background
The grid elements of the spatial target are mainly radar antennas, as shown in fig. 1. Some space targets have radar antennas that are much larger than other parts of the space targets, for example, the grid parts may be hundreds of meters in size, while other parts may be tens of meters in size, in which case, the calculation accuracy of the characteristics of the grid parts has a large influence on the calculation of the light scattering characteristics of the whole space targets. The conventional grid part processing method is shown in FIG. 2, a grid entity is directly split, and the method is feasible for a small part, but for a larger target, because grid lines are more and denser, splitting work cannot be performed, and modeling simulation cannot be performed; as shown in fig. 3, a conventional method directly divides the grid component according to the whole surface element, but the modeling method can only simulate the reflection characteristic of the grid component, loses the transmission characteristic, has poor accuracy, and cannot meet the calculation accuracy requirement of the light scattering characteristic of the space target with the grid occupying the main component.
Disclosure of Invention
The invention aims to solve the technical problem that the existing grid part processing method is not suitable for calculating the light scattering characteristic of a space target with a large-size grid part.
The invention discloses a grid-based space target light scattering characteristic modeling method, which comprises the following steps:
establishing a latticed entity model according to the external contour of the latticed entity of the space target;
carrying out single-layer medium subdivision on the latticed solid model by using subdivision software;
and setting reflection coefficients of different positions of the single-layer medium according to the sparsity of the grid on the grid-shaped entity to complete the modeling of the light scattering characteristics of the space target.
Preferably, the performing single-layer medium subdivision on the grid-shaped solid model by using subdivision software includes:
transforming the latticed solid model into a 2D topological graph by using subdivision software;
and selecting the outermost layer of the 2D topological graph, and then selecting the surface element on the outermost layer to perform subdivision operation to complete the subdivision of the single-layer medium.
Preferably, the specific method for transforming the grid-shaped solid model into the 2D topological graph by using the subdivision software comprises the following steps: and in the part of software, selecting a corresponding entity in the grid entity model to delete, so as to obtain a 2D topological graph.
Preferably, the method further comprises:
and setting the material of the single-layer medium.
Preferably, the software used for establishing the grid entity model according to the external contour of the grid entity of the space target is proE.
Preferably, the software used for establishing the latticed entity model according to the external contour of the latticed entity of the space target is SolidWorks.
Preferably, the subdivision software is Hypermesh.
Compared with the prior art, the invention has the following advantages:
the grid-shaped component is made of a material capable of reflecting and transmitting, the established model can reflect the reflection characteristic of the large-size grid component on the space target more truly, and the calculation accuracy requirement of the light scattering characteristic of the space target with the large-size grid component is met. In addition, the method of the invention has lower requirements on the hardware configuration of the computer.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a partial structural diagram of a radar antenna according to the background art of the present invention;
FIG. 2 is a schematic diagram of a local structure of a latticed entity obtained by directly subdividing the latticed entity in the background art of the present invention;
FIG. 3 is a schematic structural diagram of a latticed entity obtained by directly dividing a grid component according to a surface element in the background art of the present invention;
FIG. 4 is a schematic flow chart of a method for modeling light scattering properties of a grid-based spatial target according to an embodiment of the present invention;
FIG. 5 is a model of a mesh-like entity created from the outer contours of the mesh-like entity shown in FIG. 1, in accordance with an embodiment of the present invention;
fig. 6 is a model after being split by a single-layer medium according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
Fig. 4 is a schematic flowchart of a method for modeling light scattering properties of a grid-based spatial target according to an embodiment of the present invention, where the schematic flowchart of the method for modeling light scattering properties of a grid-based spatial target according to an embodiment of the present invention may generally include:
step S1, establishing a grid-shaped entity model according to the external outline of the grid-shaped entity of the space target:
since the light scattering characteristic simulation calculation is only concerned with characteristics such as the shape, material, and reflectance of the component, the step S1 is modeled only based on the specific dimensions of the shape of the mesh component;
taking the spatial target grid-shaped entity (the grid-shaped entity is a radar antenna) shown in fig. 1 as an example, the grid-shaped entity has a large number of grids, and the step S1 does not need to model the grids, but only models the grids according to the external overall contour of the grid-shaped entity, as shown in fig. 5, modeling the antenna as a curved surface entity by using modeling software such as ProE or solidWorks;
step S2, carrying out single-layer medium subdivision on the grid entity model by using subdivision software:
the model established in the step S1 is generally an entity solid, in the subdivision software Hypermesh, the solid with curved surface is subjected to solid deletion operation so as to modify the model into a 2D topological structure diagram capable of being subdivided, the 2D topological structure diagram of the entity generally includes multiple layers, in order to realize perspective calculation, a single-layer medium subdivision is required, that is, the outermost surfs of the 2D topological structure diagram is selected, and then a triangular surface element is selected for subdivision operation, so as to realize the single-layer medium subdivision, wherein the subdivision result is shown in fig. 6;
step S3, setting reflection coefficients of different positions of the single-layer medium according to the sparsity of the grid on the grid-shaped entity, and completing modeling of the light scattering characteristics of the space target:
in the light environment, the characteristics of the grid-shaped part are that reflection occurs at the grid part and transmission occurs at the gap part, so the grid-shaped part has both reflection and transmission characteristics, before the light scattering characteristic calculation is carried out on a single-layer medium, the properties such as reflection coefficient, transmission coefficient, material and the like need to be set according to the sparsity degree of the grid on the grid-shaped part, when the judgment part is shielded, the grid-shaped part is judged to be a single-layer grid medium, the grid-shaped part does not completely shield the part behind the grid-shaped part, the reflection coefficient of the part which is not shielded behind the grid-shaped part is multiplied by the transmission coefficient of the grid-shaped part, the product is used as the reflection coefficient of the shielded part, and the reflection coefficient is added into the light scattering characteristic calculation, thereby the characteristics of the grid-shaped part of simultaneous reflection and transmission are.
The grid-based space target light scattering characteristic modeling method can realize approximate real simulation of large-size grid parts, and the reflection and transmission method can solve the problem that the grid-shaped entity is not shielded but is shielded through surface modeling simulation, thereby avoiding the problem that the light scattering characteristics, the relevant numerical values and the image distortion of the real grid and the shielding parts thereof cannot be reflected. In addition, the solid modeling of the curved surface mesh is complicated and difficult, a large number of mesh components can not successfully perform subdivision operation on subdivision software, and although subdivision can be completed under the condition of small mesh size, a large number of tiny surface elements on the mesh have great challenges on computer simulation calculation and high memory requirements.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Claims (7)
1. A method for modeling the light scattering characteristics of a spatial target based on a grid is characterized by comprising the following steps:
establishing a latticed entity model according to the external contour of the latticed entity of the space target;
carrying out single-layer medium subdivision on the latticed solid model by using subdivision software;
and setting reflection coefficients of different positions of the single-layer medium according to the sparsity of the grid on the grid-shaped entity to complete the modeling of the light scattering characteristics of the space target.
2. The method of claim 1,
the single-layer medium subdivision on the grid entity model by using subdivision software comprises the following steps:
transforming the latticed solid model into a 2D topological graph by using subdivision software;
and selecting the outermost layer of the 2D topological graph, and then selecting the surface element on the outermost layer to perform subdivision operation to complete the subdivision of the single-layer medium.
3. The method according to claim 2, wherein the specific method for transforming the mesh-like solid model into the 2D topological graph by using the subdivision software is as follows: and in the part of software, selecting a corresponding entity in the grid entity model to delete, so as to obtain a 2D topological graph.
4. The method of claim 1, further comprising:
and setting the material of the single-layer medium.
5. The method of claim 1, wherein the software used to model the mesh entity from the outer contour of the mesh entity of the spatial target is proE.
6. The method according to claim 1, wherein the software used for modeling the mesh-like entity from the outer contour of the mesh-like entity of the spatial target is SolidWorks.
7. The method according to claim 1, wherein the subdivision software is Hypermesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110005181.7A CN112767550B (en) | 2021-01-04 | 2021-01-04 | Space target light scattering characteristic modeling method based on grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110005181.7A CN112767550B (en) | 2021-01-04 | 2021-01-04 | Space target light scattering characteristic modeling method based on grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112767550A true CN112767550A (en) | 2021-05-07 |
| CN112767550B CN112767550B (en) | 2023-04-25 |
Family
ID=75699111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110005181.7A Active CN112767550B (en) | 2021-01-04 | 2021-01-04 | Space target light scattering characteristic modeling method based on grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112767550B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007064807A1 (en) * | 2005-11-30 | 2007-06-07 | 3M Innovative Properties Company | Method and apparatus for simulation of optical systems |
| US20100302247A1 (en) * | 2009-05-29 | 2010-12-02 | Microsoft Corporation | Target digitization, extraction, and tracking |
| CN102306396A (en) * | 2011-09-15 | 2012-01-04 | 山东大学 | Three-dimensional entity model surface finite element mesh automatic generation method |
| CN111553978A (en) * | 2020-04-28 | 2020-08-18 | 上海无线电设备研究所 | Three-dimensional rough model modeling method based on triangular mesh infinitesimal |
| CN112069713A (en) * | 2020-09-10 | 2020-12-11 | 上海无线电设备研究所 | Near-field scattering characteristic modeling method, electronic device and storage medium |
-
2021
- 2021-01-04 CN CN202110005181.7A patent/CN112767550B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007064807A1 (en) * | 2005-11-30 | 2007-06-07 | 3M Innovative Properties Company | Method and apparatus for simulation of optical systems |
| US20100302247A1 (en) * | 2009-05-29 | 2010-12-02 | Microsoft Corporation | Target digitization, extraction, and tracking |
| CN102306396A (en) * | 2011-09-15 | 2012-01-04 | 山东大学 | Three-dimensional entity model surface finite element mesh automatic generation method |
| CN111553978A (en) * | 2020-04-28 | 2020-08-18 | 上海无线电设备研究所 | Three-dimensional rough model modeling method based on triangular mesh infinitesimal |
| CN112069713A (en) * | 2020-09-10 | 2020-12-11 | 上海无线电设备研究所 | Near-field scattering characteristic modeling method, electronic device and storage medium |
Non-Patent Citations (3)
| Title |
|---|
| LIANG TAO 等: "Grid-based methods for diatomic quantum scattering problems: A finite-element discrete-variable representation in prolate spheroidal coordinates" * |
| 陈伟力 等: "典型卫星表面材料可见光偏振特性分析" * |
| 韩奎: "超电大目标电磁散射问题的积分方程区域分解方法研究" * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112767550B (en) | 2023-04-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112418245B (en) | Electromagnetic emission point positioning method based on urban environment physical model | |
| CN114758337B (en) | Semantic instance reconstruction method, device, equipment and medium | |
| CN106447762A (en) | Three-dimensional reconstruction method based on light field information and system | |
| Erraji et al. | The image edge model | |
| CN111627119A (en) | Texture mapping method, device, equipment and storage medium | |
| CN114627239B (en) | Bounding box generation method, device, equipment and storage medium | |
| CN112731328A (en) | Radar target electromagnetic scattering characteristic simulation method and device | |
| CN114418836B (en) | Data processing method, device, equipment and medium | |
| CN112767550B (en) | Space target light scattering characteristic modeling method based on grid | |
| CN111583268B (en) | Point cloud virtual selection and cutting method, device and equipment | |
| JP2004193912A (en) | Ray receive judging method, system and electric wave propagation characteristics estimating method using the same | |
| CN112132215A (en) | Method and device for identifying object type and computer readable storage medium | |
| CN108074275B (en) | High-frame-frequency visible light image simulation method and system based on ray tracing algorithm | |
| CN115272549A (en) | Method and device for storing, rendering and scheduling super-large digital scene | |
| CN110443891B (en) | Gridding processing method and system of 3D model | |
| CN112765792B (en) | Space target light scattering characteristic simulation calculation method based on corrugated surface | |
| CN117115392B (en) | Model image compression method, device, computer equipment and readable storage medium | |
| Liu et al. | Recovery of sharp features in mesh models | |
| US11797730B1 (en) | Frozen boundary multi-domain parallel mesh generation | |
| CN114660605B (en) | SAR imaging processing method and device for machine learning and readable storage medium | |
| US20230224665A1 (en) | Method and apparatus for processing acoustic spatial information | |
| US20240212227A1 (en) | Methods and systems for optimizing an image generator | |
| JP2024012107A (en) | Automatic creation of three-dimensional (3d) variable resolution region geometry | |
| CN115081204A (en) | Prediction method for transient field of ultra-wide spectrum electromagnetic pulse time domain of ultra-large power platform | |
| CN118311768A (en) | Stray light calculation method of laser interference imaging system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |