A method and system for designing a radiation field overlapping with administrative divisions

Abstract

The present application belongs to the technical field of nuclear radiation field monitoring, and discloses a radiation field and administrative division overlapping design method, which generates a three-dimensional terrain model, performs real-time rendering and optimization on the model, calculates the radiation field grid concentration, and superimposes the radiation field data and GIS administrative region. The present application cross-processes the administrative division boundary data and the radiation field grid data, and gives the administrative division name covered by the radiation field and the affected population number. The influence range and change trend of the radiation field can be more intuitively reflected in the three-dimensional scene. The present application can solve the poor visualization performance problem caused by the fact that the traditional method does not support multi-dimensional display of the radiation field, and provides technical support for nuclear emergency command decision-making under a nuclear accident.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of nuclear radiation field monitoring, and particularly relates to a radiation field and administrative division overlapping design method. BACKGROUND

[0002] With the use of nuclear energy and nuclear technology, the development of nuclear technology has brought great benefits to human society, and the use of radioactive materials / rays is also becoming more and more widespread. While nuclear energy is widely used, it also hides great crisis and potential harm. The occurrence of sudden nuclear accidents will not only cause serious economic losses to society, but also will bring unpredictable harm to people's health. In the prior art, the display of nuclear emergency radiation field is the layered display of administrative division and radiation field on GIS, without analysis between layers and population statistics. In the construction of a three-dimensional visual environment, the key technologies to be solved include massive and refined three-dimensional terrain generation and management technology, multi-dimensional three-dimensional expression elements of different styles, real-time rendering optimization technology of models, and perspective interaction technology in different scenes. The complex calculation of nuclear accident radiation field and Gaussian plume diffusion model obtains the activity concentration data of the radiation field grid, and the nuclear radiation concentration field is superimposed and displayed on the GIS geographic information.

[0003] Through the above analysis, the problems and defects of the prior art are as follows:

[0004] In the prior art, the display of nuclear emergency radiation field is the layered display of administrative division and radiation field on GIS, without analysis between layers and population statistics. SUMMARY

[0005] In view of the problems in the prior art, the application provides a radiation field and administrative division overlapping design method.

[0006] The application is implemented as follows: a radiation field and administrative division overlapping design method comprises the following steps:

[0007] Step 1: generating a three-dimensional terrain model;

[0008] The real world is modeled in a solid manner. The basis of modeling is to embed spatial elements in a coordinate space, generally a Euclidean space, in which distances, directions, and areas are measured using formulas. First, geographical information is collected, including point features, line features, and surface features. The collected geographical information data is formatted, and the terrain features, building locations, lighting information, and weather information are restored by three-dimensional modeling according to the formatted data.

[0009] Step 2: real-time rendering and optimization of the model:

[0010] With high-definition satellite remote sensing images, digital elevation model, three-dimensional model, vector map geographic information data as support, through three-dimensional modeling and real-time rendering technology, three-dimensional geography and natural environment are stereoscopically presented, and professional terrain and space analysis, multi-element multi-temporal image management, three-dimensional application graphics support technology are provided; through organization and simulation of real terrain, ground objects, geography and target data, a high restoration degree of virtual terrain analysis and scene display is provided for users;

[0011] Step 3, calculate the radiation field grid concentration:

[0012] According to the nuclear accident source data, combined with the radiation diffusion plume model, the radioactive radiation level is calculated through the mathematical model, the spatial radiation field in the environment is calculated by using the multi-thread programming method, and the radiation field formed by the spatial radiation material distribution is automatically written into the background database;

[0013] Step 4, superimpose the radiation field data and the GIS administrative region:

[0014] The radiation field data in the background database is superimposed and displayed with the spatial information of GIS to display the disaster administrative region covered by the radiation field; the administrative division name and the population number of the administrative region covered by the radiation field are further calculated.

[0015] Further, the point-like elements are: public security, fire control, emergency center, hospital, emergency gathering point, emergency shelter and the like; the line-like elements are: road, water system, bridge and culvert and the like; the surface-like elements are: residential area, school, factory and population-dense important public place in the city.

[0016] Further, the three-dimensional terrain model is generated:

[0017] Firstly, a three-dimensional scene is established, a specific place is simulated to construct a scene model, basic geographic information is collected, based on a situation data model, spatial drawing tools are used in combination with OpenGL to complete the drawing of spatial lines in a virtual engine, including solid lines, dashed lines, arrow lines, dynamic Mesh generation tools and particle generation tools are used to draw three-dimensional VR visual elements, including spheres, ellipsoids, cuboids, irregular three-dimensional models;

[0018] The visual elements support superposition and independent display in the scene, the display of the situation elements is divided into different display modes of points, lines, surfaces and bodies, the dynamic drawing and combination of the basic tools are used for classified display, and the display modes of points, lines, surfaces and bodies are automatically optimized to adapt to the viewing angle, and the evolution of the situation is dynamically drawn and displayed;

[0019] Point class: micro model, three-dimensional target

[0020] Line class: target trajectory, speed, direction tangent

[0021] Body class: spatial power range, radiation field range

[0022] Secondly, the user interaction is created in the three-dimensional scene map, specifically, the UI interaction button is created using Qt (a GUI library), the related code work is improved, and the roaming operation and user interaction are realized; the user can automatically switch different perspectives in the virtual scene through various interactions; the perspective is arbitrarily switched from far to near and from near to fine, so as to provide more detailed scene information for the operator.

[0023] Further, the model is rendered and optimized in real time:

[0024] (1) Enhanced quadtree data structure is adopted to store the block terrain data, and one-dimensional fractal algorithm of Hilbert space filling curve is adopted to reduce the query times of data;

[0025] (2) Level of detail model (LOD), block texture index and multi-resolution texture technology are adopted to reduce the rendering pressure without reducing the display quality;

[0026] (3) Multi-core parallel technology is used to improve the speed of data preprocessing before rendering, and to solve the problem of delay loading of large scene block terrain;

[0027] (4) GPU multi-stream processor and LOD hybrid scheduling technology are adopted to optimize the monitoring and release of memory, realize dynamic terrain effect, and show the changes of elevation and image data due to environmental changes or interaction between simulation models.

[0028] Further, the radiation field grid concentration is calculated:

[0029] Firstly, the source term calculation method is combined with the actual source term investigation data to form the source term basic data;

[0030] Secondly, the source term basic data is brought into the radiation diffusion plume model to obtain the radiation field diffusion model;

[0031] Thirdly, the spatial radiation field in the environment is calculated by using the multi-thread programming method;

[0032] Finally, the radiation field formed by the spatial radiation material distribution is automatically written into the background database.

[0033] Further, the radiation field data is superimposed with the GIS administrative region:

[0034] Firstly, the edge data and the radiation field grid concentration data are extracted, and the edge grid of the radiation field at each moment is extracted to form an envelope coordinate set;

[0035] Secondly, the intersection of the envelope coordinate set and the administrative boundary coordinate set is calculated, and the administrative region where the intersection point is located is calculated;

[0036] Thirdly, the radiation field data layer and the GIS administrative region layer are superimposed and displayed;

[0037] Finally, the administrative region name and the population total covered by the radiation field are calculated through superposition.

[0038] Another object of the present application is to provide a radiation field and administrative region overlap calculation system comprising:

[0039] The model generation module is used for generating a three-dimensional terrain model; the real world is modeled in a solid manner, and the modeling basis is embedding spatial elements in a coordinate space, generally Euclidean space, in which distance, direction and area are measured by using formulas; firstly, geographical information is collected, including point-like elements, line-like elements and surface-like elements; the collected geographical information data is formatted, and the terrain features, building positions, illumination information and weather information are restored by three-dimensional modeling according to the formatted data;

[0040] The rendering optimization module is used for real-time rendering and optimization of the model; high-definition satellite remote sensing images, digital elevation models, three-dimensional models and vector map geographical information data are used as supports, three-dimensional modeling and real-time rendering technologies are used to stereoscopically display three-dimensional geography and natural environment, and professional terrain and space analysis, multi-element and multi-temporal image management and three-dimensional application graphics support technology are provided; real terrain, ground objects, geography and target data organization and simulation are provided to users to provide a realistic virtual terrain analysis and scene display;

[0041] The calculation module is used for calculating the radiation field grid concentration; according to nuclear accident source term data, combined with a radiation diffusion plume model, the radioactive radiation level is calculated by a mathematical model, the spatial radiation field in the environment is calculated by using a multi-thread programming method, and the radiation field formed by the diffusion of the spatial radiation material is automatically written into a background database;

[0042] The superposition module is used for superimposing the radiation field data and the GIS administrative region; the radiation field data in the background database and the spatial information of GIS are superimposed and displayed to display the disaster administrative region covered by the radiation field; and the administrative region name and the population number of the administrative region covered by the radiation field are further calculated.

[0043] Another object of the present application is to provide a computer device comprising a memory and a processor, wherein the memory stores a computer program, and the computer program is executed by the processor to make the processor execute the steps of the radiation field and administrative region overlap design method.

[0044] Another object of the present application is to provide a computer readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the steps of the radiation field and administrative division overlap design method.

[0045] Another object of the present application is to provide an information data processing terminal for implementing the radiation field and administrative division overlap calculation system.

[0046] In combination with the above technical solutions and solved technical problems, the technical solution of the present application has the following advantages and positive effects:

[0047] Firstly, the present application cross-processes administrative division boundary data and radiation field grid data to give the administrative division name covered by the radiation field and the number of affected population. It can more intuitively reflect the influence range and trend of the radiation field in the three-dimensional scene. It can solve the problem of poor visualization performance caused by the fact that the traditional method does not support multi-dimensional display, and provide technical support for nuclear emergency command decision-making under nuclear accidents.

[0048] Secondly, the expected income and commercial value of the technical solution of the present application after transformation are:

[0049] It can combine the dynamic changes of the dose field to cumulatively calculate the cumulative dose rate of point, line and surface element areas, and automatically screen out areas that need to take iodine, hide and evacuate according to the cumulative dose rate threshold, providing technical support for the development of emergency plans.

[0050] Thirdly, the technical solution of the present application solves the problems of the prior art:

[0051] 1. Difficulty in integrating three-dimensional terrain modeling and real data

[0052] In the integration of complex terrain and multi-source geographic data, the existing technology usually has the problems of insufficient model resolution and unclear expression of spatial features, especially in the processing of multi-element comprehensive scenes such as buildings, terrain and weather, it is difficult to realize fine three-dimensional scene modeling.

[0053] 2. Low efficiency of large-scale data rendering

[0054] In the face of massive data such as high-definition satellite images, digital elevation models (DEM) and vector maps, the existing real-time rendering technology is difficult to balance global scene and local details, resulting in high rendering delay and unable to meet the demand for fast response to large-scale data in emergency scenes.

[0055] 3. Insufficient accurate calculation of radiation diffusion field

[0056] In existing radiation diffusion calculation methods, often only rely on a single model or two-dimensional analysis, lack of precise simulation of spatial characteristics, resulting in the accuracy of radiation concentration grid calculation and regional coverage results is insufficient, limiting the scientific decision-making of emergency management.

[0057] 4. Radiation field and administrative division overlay analysis is not comprehensive

[0058] In traditional methods, the overlay of radiation field data and GIS administrative division is mostly static processing, which cannot dynamically analyze the radiation diffusion process, and it is also difficult to obtain real-time administrative information (such as population distribution and coverage area) of the affected area, thereby limiting the rapid application in emergency events.

[0059] Significant technological progress:

[0060] 1. Achieve high-precision three-dimensional terrain modeling and multi-element integration

[0061] The model generation module combines point, line, surface and other geographic elements with satellite images, building locations, lighting and weather information to generate a three-dimensional terrain model that highly restores the real environment.

[0062] Dynamic Mesh and particle generation tools are used to support three-dimensional scene modeling and comprehensive display of multi-dimensional elements, overcoming the problems of insufficient resolution and missing details in traditional modeling.

[0063] 2. Improve large-scale data rendering efficiency and display quality

[0064] Through the joint optimization of LOD (Level of Detail) model, multi-resolution texture and GPU multi-stream processor, the invention significantly improves the real-time rendering efficiency of large-scale three-dimensional scenes.

[0065] Enhanced quadtree data structure and Hilbert curve algorithm are used to optimize data storage and retrieval, solving the delay problem of large-scale terrain data processing and achieving efficient dynamic display of global and local scenes.

[0066] 3. Accurate simulation of radiation field diffusion and grid concentration calculation

[0067] Using the radiation diffusion plume model combined with nuclear accident source data, the dynamic changes of the spatial radiation field are simulated, and the calculation efficiency is improved through multi-thread programming to generate accurate radiation concentration grid data.

[0068] These data are automatically stored in the background database to provide reliable support for subsequent analysis and display, while ensuring the real-time and accuracy of dynamic change scenarios.

[0069] 4. Realize dynamic radiation field and GIS administrative division overlay analysis

[0070] The system dynamically identifies the administrative regions affected by radiation by extracting the intersection of the radiation field grid boundary and the administrative boundary, and calculates the name, population distribution, and area statistics of the radiation coverage area in real time.

[0071] The linkage display of the dynamic diffusion process of the radiation field and the administrative division information is realized, providing scientific and precise decision support for disaster emergency command.

[0072] 5. Comprehensive and interactive improvement of comprehensive impact analysis

[0073] The system supports intuitive display of the radiation field coverage range, impact degree, and dose distribution (such as evacuation range and iodine-taking area) in the form of charts and maps, and allows users to dynamically adjust the viewing angle and observe details through the interactive interface.

[0074] The comprehensive analysis function provides efficient technical support for emergency plan design, resource allocation, and disaster impact assessment.

[0075] Through technical innovation, the present application has made significant technical progress in three-dimensional terrain modeling, radiation field calculation, and GIS overlay analysis, mainly in the following aspects:

[0076] Precision improvement: Multi-element three-dimensional modeling and radiation field simulation improve the authenticity and reliability of data.

[0077] Efficiency improvement: The use of multi-threaded computing and rendering optimization technology greatly improves the data processing speed and dynamic display performance.

[0078] Decision support: Through the overlay analysis of radiation field and administrative division, precise spatial information is provided, which provides a scientific basis for emergency command and disaster assessment.

[0079] These advances not only solve the key problems in the existing technology, but also promote the wide application of this technology in nuclear emergency response, environmental protection, and air pollution monitoring. BRIEF DESCRIPTION OF DRAWINGS

[0080] Figure 1 is a radiation field and administrative division overlap design method flowchart provided by the embodiment of the present application.

[0081] Figure 2 is a method flowchart for overlaying radiation field data and GIS administrative regions provided by the embodiment of the present application.

[0082] Figure 3 is a radiation field and administrative division overlap calculation system structure block diagram provided by the embodiment of the present application. DETAILED DESCRIPTION

[0083] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0084] As shown in S101, a three-dimensional terrain model is generated. Figure 1

[0085] Preferably, the three-dimensional geographic model can be realized according to the following manner.

[0086] Firstly, a three-dimensional scene is established, a specific site simulation is constructed to build a scene model, geographic basic information is collected, a situation data model is used, a space drawing tool is combined with OpenGL to complete the drawing of a space line in a virtual engine, including a solid line, a dotted line, an arrow line, etc., a dynamic Mesh generation tool and a particle generation tool are used to draw a three-dimensional VR visual element, including a sphere, an ellipsoid, a cuboid, an irregular three-dimensional model, etc.

[0087] The visual element supports superposition and independent display in the scene, the display of the situation element is divided into different display modes of points, lines, surfaces and bodies, the dynamic drawing and combination of the basic tool are used for classified display, and the display mode of the points, lines, surfaces and bodies is automatically optimized to adapt to the viewing angle, and the evolution of the situation is dynamically drawn and displayed.

[0088] Point type: miniature model, three-dimensional target, etc.

[0089] Line type: target trajectory, speed, direction tangent, etc.

[0090] Body type: space power range, radiation field range, etc.

[0091] Secondly, user interaction is created in the three-dimensional scene graph, specifically, Qt (a GUI library) is used to create UI interactive buttons, related code work is improved, and roaming operation and user interaction are realized. The user can automatically switch different viewing angles in the virtual scene through various interactions. By switching the viewing angle from far to near and from near to fine, more detailed scene information is provided for the operator.

[0092] Then, in S102, the model is rendered and optimized in real time.

[0093] Preferably, the real-time rendering and optimization of the three-dimensional model can be obtained in the following manner.

[0094] ​First, with high-definition satellite remote sensing images, digital elevation models, three-dimensional models, vector maps and other geographic information data as support, the three-dimensional modeling and real-time rendering technology is used to stereoscopically display the three-dimensional geography and natural environment, and to provide professional terrain and spatial analysis, multi-element and multi-temporal image management, three-dimensional application graphics support and other technologies. Through the organization and simulation of real terrain, features, geography and target data, a realistic virtual terrain analysis and emergency scene environment is provided to the user.

[0095] Second, to meet the demand for large-scale emergency scene situation display, the three-dimensional engine not only supports the display of thousands of kilometers of global terrain, but also supports the display of fine small scenes in local areas. The requirements for data reading and image rendering are very high. The following methods are mainly used to optimize the image rendering speed:

[0096] (1) Enhanced quadtree data structure is used to store the block terrain data, and one-dimensional fractal algorithm of Hilbert space filling curve is used to reduce the number of data queries, thereby solving the problem of processing massive terrain data;

[0097] (2) Level of detail (LOD), block texture index and multi-resolution texture technology are used to reduce the rendering pressure without reducing the display quality;

[0098] (3) Multi-core parallel technology is used to improve the speed of data preprocessing before rendering, and to solve the problem of delayed loading of large scene block terrain;

[0099] (4) GPU multi-stream processor and LOD hybrid scheduling technology are used to optimize the monitoring and release of memory, to realize dynamic terrain effect, to show the changes in elevation and image data due to environmental changes or interactions between simulation models, and to improve the realism and credibility of emergency scene simulation.

[0100] Next, in S103, the radiation field grid concentration is calculated.

[0101] Preferably, the radiation field grid concentration calculation can be obtained in the following way.

[0102] First, the source term calculation method is used in combination with the actual source term investigation data to form the source term basic data.

[0103] Second, the source term basic data is brought into the radiation diffusion plume model to obtain the radiation field diffusion model.

[0104] Third, the spatial radiation field in the environment is programmed using a multi-thread programming method.

[0105] Finally, the radiation field formed by the spatial radiation level is automatically written into the background database.

[0106] For example, Figure 2As shown, then, in S104, the radiation field data is superimposed with the GIS administrative region.

[0107] Preferably, the superimposition of the radiation field data with the GIS administrative region can be obtained in the following manner.

[0108] S201, by extracting the boundary data and the radiation field grid concentration data, the radiation field edge grid at each time is extracted to form an envelope coordinate set;

[0109] S202, the intersection of the envelope coordinate set and the administrative division boundary coordinate set is calculated, and the administrative division region where the intersection point is located is calculated;

[0110] S203, the radiation field data layer and the GIS administrative region layer are superimposed and displayed;

[0111] S204, the administrative division name and the total population covered by the radiation field are calculated by superimposition calculation.

[0112] In S101, a three-dimensional scene model is first established, and a virtual scene is constructed by collecting geographic basic information and using a situation data model in combination with OpenGL technology. In the virtual engine, with the help of a dynamic Mesh generation tool and a particle generation tool, spatial lines such as solid lines, dashed lines and arrow lines, and three-dimensional visual elements such as spheres, ellipsoids and cuboids are drawn, and multiple situation display modes of points, lines, surfaces and bodies are supported. The system realizes dynamic drawing of different perspectives through automatic optimization of display modes. To enhance user experience, a user interaction interface is created using a Qt library, and a roaming operation function is provided to allow users to randomly switch perspectives in the virtual scene and obtain detailed topographic information from a macroscopic to a microscopic perspective.

[0113] In S102, the rendering of the three-dimensional model is based on high-definition satellite remote sensing images, digital elevation models, vector maps and other data, and a realistic terrain environment is presented through three-dimensional modeling and rendering technology, and complex terrain and spatial analysis are supported. To improve rendering efficiency, an enhanced quadtree data structure is used to store terrain data, and Hilbert curve algorithm is used to optimize data query; LOD detail level model and multi-resolution texture technology are used to reduce rendering pressure; multi-core parallel technology is used to speed up the preprocessing of large-scale scenes; GPU multi-stream processor and LOD hybrid scheduling technology are used to optimize the dynamic update of terrain data, and the terrain and image changes caused by environmental changes are presented, and the realism of emergency scene simulation is improved.

[0114] In S103, the radiation field grid concentration calculation is based on a source term calculation method, source term basic data is formed through actual investigation data, and is brought into a radiation diffusion plume model to construct a radiation field diffusion model. Subsequently, a multi-thread programming method is used to simulate a spatial radiation field, and radiation level data is automatically written into a background database to form spatial radiation field grid data available for analysis. This process ensures the efficiency of radiation field simulation and the standardization of data storage, and provides accurate radiation field concentration distribution for subsequent analysis.

[0115] In S104, radiation field grid concentration data and administrative division boundary data are first extracted to generate a radiation field edge grid envelope coordinate set at each time; then the intersection of the envelope coordinate set and the administrative division boundary is calculated to identify the administrative region to which the intersection point belongs. Through layer superposition display, the radiation field coverage area is intuitively displayed, and the administrative division name and total population in the coverage area are calculated. This method provides an accurate spatial analysis tool for environmental impact assessment and emergency decision-making.

[0116] As shown in Figure 3 , the radiation field and administrative division overlap calculation system provided by the embodiment of the present application comprises:

[0117] A model generation module is configured to generate a three-dimensional terrain model; the real world is modeled in a solid manner, and the basis of modeling is to embed spatial elements in a coordinate space, generally a Euclidean space, in which distances, directions and areas are measured by using formulas; first, geographic information is collected, including point-like elements, line-like elements and surface-like elements; the collected geographic information data is formatted, and terrain features, building locations, lighting information and weather information are restored by three-dimensional modeling according to the formatted data;

[0118] A rendering optimization module is configured to perform real-time rendering and optimization on the model; high-definition satellite remote sensing images, digital elevation models, three-dimensional models and vector map geographic information data are used as supports, three-dimensional geographic and natural environments are stereoscopically presented through three-dimensional modeling and real-time rendering technology, and professional terrain and spatial analysis, multi-element and multi-temporal image management and three-dimensional application graphics support technology are provided; real terrain, features, geography and target data are organized and simulated to provide a user with a realistic virtual terrain analysis and scene display;

[0119] A calculation module is configured to calculate radiation field grid concentration; according to nuclear accident source term data, in combination with a radiation diffusion plume model, radioactive radiation levels are calculated by a mathematical model, a spatial radiation field in the environment is programmed by using a multi-thread programming method, and a radiation field formed by diffusion of spatial radiation substances is automatically written into a background database;

[0120] Superimposition module for superimposing radiation field data with GIS administrative regions; superimpose radiation field data in the background database with GIS spatial information to display disaster administrative regions covered by the radiation field; further calculate the administrative division name and population of the administrative region covered by the radiation field.

[0121] 1. Generation of three-dimensional terrain model and scene modeling

[0122] The system realizes three-dimensional terrain modeling through the model generation module, embedding spatial elements in the real world into a unified Euclidean coordinate space. The collected geographic information data includes point elements (such as building locations), line elements (such as roads and rivers), and surface elements (such as terrain areas). After formatting processing, these data are combined with terrain features, building locations, lighting information, and weather conditions to restore the real environment using three-dimensional modeling technology, thereby constructing a three-dimensional model of the real environment and providing a high-precision foundation for radiation field calculation.

[0123] 2. Real-time rendering and optimization of three-dimensional model

[0124] The rendering optimization module is responsible for real-time rendering of the generated three-dimensional terrain model and improving the display effect through optimization techniques. Supported by high-definition satellite remote sensing images, digital elevation models, vector maps, and other geographic information data, the LOD (Level of Detail) model and multi-resolution texture technology are used for optimization to reduce the rendering calculation load. Based on three-dimensional modeling, through dynamic light processing and simulation technology, the complex terrain and natural environment are stereoscopically presented to provide users with realistic virtual analysis and scene display capabilities.

[0125] 3. Radiation field grid concentration calculation

[0126] The calculation module calculates the radioactive radiation level and diffusion range based on nuclear accident source data and combined with the radiation diffusion plume model. This module simulates the spatial radiation field diffusion behavior through mathematical models, uses multi-thread programming to improve calculation efficiency, and writes the calculation results into the background database. The radiation concentration data is stored in a grid form to ensure that the radiation distribution information at different time points and spatial regions can be accurately recorded, providing reliable data support for subsequent superposition calculation and display.

[0127] 4. Superimposition analysis of radiation field data and GIS administrative division

[0128] The superimposition module superimposes the radiation field grid concentration data in the background database with the GIS administrative division data. The system first extracts the intersection of the radiation field grid boundary coordinates and the administrative division boundary coordinates, thereby identifying the administrative regions affected by the radiation. Subsequently, the system calculates the administrative division names covered by the radiation field and counts the total population in the affected areas. These data are visually displayed in the form of tables and maps, providing detailed spatial analysis results for emergency management.

[0129] 5. Analysis and visualization of comprehensive impact

[0130] In the comprehensive impact analysis, the system generates analysis results in the form of charts and maps, including detailed statistics of the radiation field coverage range and superimposition map display of the radiation field and administrative division. Users can dynamically switch between different time points and radiation intensity ranges through the interactive interface to observe the spatial evolution of the radiation field under different scenarios. Combined with the dose impact analysis, the system provides a scientific basis for the government to develop precise evacuation and protection measures.

[0131] 6. Data storage and support of information data processing terminal

[0132] The computer device provided by the present application runs the radiation field and administrative division overlap calculation program through the memory and processor to execute the function steps of each module. In addition, the computer readable storage medium ensures that the program can be quickly deployed in different terminals. The information data processing terminal seamlessly integrates the three-dimensional terrain model, radiation field calculation results, and administrative division overlap analysis, realizes the whole process operation from model generation to real-time calculation and display, and provides users with an efficient and intuitive comprehensive impact analysis tool. Embodiment 1: Nuclear power plant radiation emergency response system

[0133] When a nuclear power plant experiences a radiation leakage event, it needs to quickly assess the radiation diffusion range and affected areas to provide a basis for emergency decision-making and evacuation of the public. Traditional methods are slow and have insufficient spatial coverage.

[0134] 1. Three-dimensional terrain modeling and scene building

[0135] A three-dimensional terrain model of the area around the nuclear power plant is constructed using high-definition satellite remote sensing images and digital elevation models (DEM), including plant site, nearby residential areas, mountainous terrain, rivers, and other terrain features.

[0136] Using OpenGL and dynamic mesh technology, environmental features are visually displayed in the form of points, lines, surfaces, and bodies.

[0137] 2. Radiation field concentration calculation

[0138] The radiation diffusion plume model is input combined with the nuclear power plant leakage source term data (such as leakage intensity, duration, etc.) to calculate the radiation field concentration distribution at each time point.

[0139] Improve simulation efficiency with multi-threaded computation, generate gridded radiation field distribution data.

[0140] 3. GIS Overlay and Administrative Area Analysis

[0141] Overlay radiation field data with GIS administrative boundaries, extract affected area administrative boundaries and related population data.

[0142] Real-time update of overlay results, dynamically predict coverage area and impact range based on radiation diffusion.

[0143] 4. Emergency Response and Visualization

[0144] Switch different perspectives through user interaction functions to observe changes in radiation diffusion in time and space dimensions.

[0145] Output evacuation plans for affected areas, including traffic diversion routes, medical resource distribution, and other information.

[0146] Quickly generate radiation impact range to provide precise spatial decision support for government emergency command.

[0147] Reduce personnel casualties and economic losses, and improve nuclear emergency response capabilities.

[0148] Example 2: Atmospheric Pollution Monitoring and Early Warning System

[0149] Background

[0150] Atmospheric pollution problems in urban industrial areas require real-time monitoring and early warning of pollutant diffusion. Traditional single data models cannot meet the needs of regional analysis.

[0151] Implementation Process

[0152] 1. Three-dimensional terrain modeling and scene building

[0153] Use high-precision geographic data to create a three-dimensional terrain model of the industrial area and its surroundings, including factories, transportation arteries, residential areas, etc.

[0154] Combine particle generation tools to simulate industrial emission source distribution, creating a dynamic atmospheric pollution scene.

[0155] 2. Pollutant concentration field calculation

[0156] Based on actual monitoring data (such as pollutant emission intensity and meteorological data) combined with atmospheric diffusion models, simulate pollutant diffusion paths and concentration changes.

[0157] Use dynamic rendering technology to display real-time atmospheric pollution distribution scenarios.

[0158] 3. GIS overlay and area analysis

[0159] Overlay pollution field grid data with urban administrative boundaries to extract the intersection of pollution field boundaries and population dense areas.

[0160] Calculate heavily polluted areas and their affected population based on pollutant concentration.

[0161] 4. Warning and governance simulation

[0162] Show the diffusion of pollution sources in real-time from multiple perspectives, allowing managers to observe the situation.

[0163] Provide simulations of feasible pollution control solutions, such as industrial emission reduction schemes or local traffic closure measures.

[0164] Provide real-time data support for environmental monitoring departments to improve the timeliness of pollution event warnings.

[0165] Help decision-makers optimize pollution control solutions, improve urban air quality, and reduce the health risks of residents.

[0166] It should be noted that the embodiments of the present application can be realized by hardware, software, or a combination of software and hardware. The hardware part can be realized by special logic; the software part can be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or a specially designed hardware. Those skilled in the art can understand that the above-mentioned devices and methods can be realized by computer executable instructions and / or included in processor control code, such as carrier media, such as magnetic disk, CD or DVD-ROM, programmable memory, such as read-only memory (firmware), or data carrier, such as optical or electronic signal carrier. The device and its modules of the present application can be realized by hardware circuit, such as ultra-large scale integrated circuit or gate array, semiconductor, such as logic chip, transistor, etc., or programmable hardware device, such as field programmable gate array, programmable logic device, etc., can also be realized by software executed by various types of processors, and can also be realized by the combination of the above hardware circuit and software, such as firmware.

[0167] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any modification, equivalent replacement and improvement made by those skilled in the art within the technical range disclosed by the present application, as long as it is within the spirit and principle of the present application, should be covered within the protection scope of the present application.

Claims

1. A method for designing a radiation field overlaying an administrative division, characterized in that, Comprise the following steps: Step 1, generate three-dimensional terrain model; The real world is modeled by entity, and the basis of modeling is to embed spatial elements in a coordinate space, which is Euclidean space, in which distance, direction and area are measured by formulas; First, collect geographic information, including point elements, line elements and surface elements; Format the collected geographic information data, and restore the terrain features, building locations, lighting information and weather information according to the formatted data; Step 2, real-time rendering and optimization of the model: Based on high-definition satellite remote sensing image, digital elevation model, three-dimensional model and vector map geographic information data, three-dimensional geographic and natural environment are displayed through three-dimensional modeling and real-time rendering technology, and professional terrain and space analysis, multi-element and multi-temporal image management, three-dimensional application graphics support technology are provided; Through the organization and simulation of real terrain, ground objects, geography and target data, a realistic virtual terrain analysis and scene display is provided for users; Step 3, calculate the radiation field grid concentration: According to the nuclear accident source data, combined with the radiation diffusion plume model, the radioactive radiation level is calculated by mathematical model, the spatial radiation field in the environment is calculated by multi-thread programming method, and the radiation field formed by the diffusion of spatial radiation material is automatically written into the background database; Step 4, overlay radiation field data and GIS administrative region: Overlay the radiation field data in the background database with the spatial information of GIS to display the disaster administrative region covered by the radiation field; Further calculate the administrative division name and population number of the administrative region covered by the radiation field; The overlay of radiation field data and GIS administrative region: Firstly, by extracting the boundary data and radiation field grid concentration data, the edge grid of the radiation field at each moment is extracted to form an envelope coordinate set; Secondly, find the intersection of the envelope coordinate set and the administrative division boundary coordinate set, and find the administrative division area where the intersection point is located; Thirdly, overlay the radiation field data layer and the GIS administrative region layer for display; Finally, the administrative division name and the total population covered by the radiation field are calculated by overlaying.

2. The method of claim 1, wherein the step of designing the radiation field to overlap the administrative division comprises the step of: The point elements are: public security, fire control, emergency center, hospital; The line elements are: road, water system, bridge and culvert; The surface elements are: residential area, school and factory in city, and important public place with dense population. ​ 3. The method of claim 1, wherein the step of designing the radiation field to overlap the administrative division comprises the step of: The generation of three-dimensional terrain model: ​ Firstly, establish a three-dimensional scene, specifically simulate and build a scene model, collect geographic basic information, based on the situation data model, use spatial drawing tools combined with OpenGL to complete the drawing of spatial lines in virtual engine, including solid line, dashed line and arrow line, use dynamic mesh generation tools and particle generation tools to draw three-dimensional VR visual elements, including sphere, ellipsoid, cuboid and irregular solid model; The visual elements support superimposition and independent display in the scene, the display of the situation elements is divided into different display modes of points, lines, surfaces and bodies, the classified display is performed by using dynamic drawing and combination of basic tools, and the display modes of points, lines, surfaces and bodies are automatically optimized to adapt to the viewing angle and dynamically draw and display the evolution of the situation; Point class: miniature model, three-dimensional target Line class: target trajectory, speed, direction tangent Body class: space power range, radiation field range Secondly, user interaction is created in the three-dimensional scene, specifically, UI interaction buttons are created using the GUI library Qt, related code work is improved, and roaming operation and user interaction are realized; the user can automatically switch different viewing angles in the virtual scene through various interactions; the viewing angle is switched from far to near and from near to fine, providing more detailed scene information for the operator.

4. The method of claim 1, wherein the step of designing the radiation field overlaps with the administrative division. The model is rendered and optimized in real time: (1) Enhanced quadtree data structure is used to store the block terrain data, and one-dimensional fractal algorithm of Hilbert space filling curve is used to reduce the query times of data; (2) Level of detail (LOD), block texture index and multi-resolution texture technology are used to reduce the rendering pressure without reducing the display quality; (3) Multi-core parallel technology is used to improve the speed of data preprocessing before rendering, and the problem of delayed loading of large scene block terrain is solved; (4) GPU multi-stream processor and LOD hybrid scheduling technology are used to optimize the monitoring and release of memory, realize dynamic terrain effect, and show the changes of elevation and image data due to environmental changes or interaction between simulation models.

5. The radiation field and administrative division overlap design method as described in claim 1, characterized in that, The radiation field grid concentration is calculated: Firstly, the source term calculation method is used to form the source term basic data combined with the actual source term investigation data; Secondly, the source term basic data is brought into the radiation diffusion plume model to obtain the radiation field diffusion model; Thirdly, the spatial radiation field in the environment is programmed by using the multi-thread programming method; Finally, the radiation field formed by the diffusion of spatial radiation materials is automatically written into the background database.

6. A radiation field and administrative division overlapping calculation system for implementing the radiation field and administrative division overlapping design method according to any one of claims 1 to 5, characterized by, The radiation field and administrative division overlap calculation system comprises: A model generation module is configured to generate a three-dimensional terrain model; the real world is modeled in a physical manner, and the basis of modeling is to embed spatial elements in a coordinate space; the coordinate space is Euclidean space, in which distances, directions and areas are measured by using formulas; first, geographic information is collected, including point-like elements, line-like elements and surface-like elements; the collected geographic information data is formatted, and terrain features, building locations, lighting information and weather information are restored by three-dimensional modeling according to the formatted data; The rendering optimization module is used for real-time rendering and optimization of the model; high-definition satellite remote sensing images, digital elevation models, three-dimensional models, vector map geographic information data are supported, three-dimensional modeling and real-time rendering technology are used to stereoscopically display three-dimensional geography and natural environment, and professional terrain and space analysis, multi-element and multi-temporal image management, three-dimensional application graphics support technology are provided; through organization and simulation of real terrain, features, geography and target data, a realistic virtual terrain analysis and scene display are provided for users; The computing module is used for calculating the radiation field grid concentration; according to nuclear accident source term data, in combination with a radiation diffusion plume model, a radioactive radiation level is calculated through a mathematical model, a spatial radiation field in an environment is calculated by using a multi-thread programming method, and a radiation field formed by diffusion of a spatial radiation material is automatically written into a background database; The superimposition module is used for superimposing the radiation field data and GIS administrative regions; radiation field data in the background database and spatial information of GIS are superimposed and displayed, and disaster administrative regions covered by the radiation field are displayed; names of administrative divisions and population quantities of the administrative divisions covered by the radiation field are further calculated.

7. A computer device, comprising: The computer device comprises a memory and a processor, the memory stores a computer program, and the computer program is executed by the processor to enable the processor to execute steps of the radiation field and administrative division overlapping design method according to any one of claims 1-5. 8.A computer readable storage medium, storing a computer program, the computer program being executed by a processor to enable the processor to execute steps of the radiation field and administrative division overlapping design method according to any one of claims 1-5.

9. An information data processing terminal, characterized by The information data processing terminal is used to implement the radiation field and administrative division overlapping calculation system according to claim 6.

Images