Radiation source positioning method based on spatial analysis and radio wave propagation model

Abstract

The invention provides a radiation source positioning method based on spatial analysis and a radio wave propagation model, which comprises the following steps: generating a unified multi-dimensional digital map for positioning, establishing an antenna database, and carrying out data modeling on an own radiation source and an external radiation source; plotting specific deployment positions of the own radiation source and the external radiation source; extracting a terrain elevation value and a slope value of the point, and judging the relative elevation of each point relative to the position point of the own radiation source and whether the transmission of radiation waves of the own radiation source to each point is obstructed or not; determining whether the antenna device of the own radiation source can be erected at each position point or not and whether the erected antenna device has concealment or not; the shortest road travel distance between the position point where the local radiation source is expected to be set and the starting point is calculated, the radiation attenuation value from the position point of the local radiation source to the external radiation source is calculated according to different radio wave propagation models, and the suppression power of the local radiation source is calculated; and calculating the optimal position point of the local radiation source.

Description

Technical Field

[0001] The invention belongs to the technical field of discovering and locating radio radiation sources, and relates to a radiation source locating method based on space analysis and radio wave propagation model. Background Art

[0002] The location selection of jamming equipment is directly related to the jamming effect on the opponent and its own survivability, and requires comprehensive consideration of multiple factors. In addition to subjective factors such as battlefield command, radio wave transmission characteristics and geographical environment are very important objective auxiliary decision-making factors.

[0003] Radio wave propagation has always been one of the most widely concerned and researched directions in the field of engineering electromagnetic field theory and environmental electromagnetic characteristics research. In free space, radio wave propagation is a relatively simple phenomenon. For an infinitely large free space, the electromagnetic waves emitted by a finite-sized wave source are all propagated outward in the form of spherical waves, and the power density will remain unchanged within a given solid angle on the sphere. However, on the earth, due to the complex surface characteristics, radio wave propagation on the surface is a radio wave propagation problem in a complex environment. When electromagnetic waves propagate in various surface forms such as sea surface, lake (river) surface, dry ground, wet ground, and undulating terrain such as mountains, plains, hills and tall buildings, they will show different propagation mechanisms such as reflection, refraction, diffraction, transmission and scattering. Since the occurrence of these mechanisms is very random, it is quite difficult to accurately predict the radio wave propagation characteristics in a complex environment.

[0004] The geographical environment generally includes factors such as topography, landforms, transportation, and surface coverage, and is usually expressed in the form of a three-dimensional digital map. A three-dimensional digital map is a technical system that collects, stores, manages, calculates, analyzes, displays, and describes the relevant geographical distribution data in the entire or part of the earth's surface (including the atmosphere) space with the support of computer hardware and software systems. It can not only solve the acquisition, management, and visualization of the above battlefield geographical environment data, but also has a strong geological analysis capability to extract key feature parameters from these data for the development and design of intelligent point selection algorithms based on combat rules, and ultimately realize an intelligent point selection system for jamming equipment based on three-dimensional digital maps.

[0005] At present, in the site selection of electronic countermeasure equipment, the method of manual point selection is generally adopted, and the appropriate location is found on a two-dimensional or three-dimensional map according to the terrain and landform conditions based on the operator's experience. This method can give full play to people's subjective initiative and comprehensively consider various human and geographical factors when selecting a location, but it relies heavily on personal experience and judgment, and cannot be quantitatively analyzed, especially the impact of terrain factors on radio wave propagation cannot be considered globally, and the selected location cannot be guaranteed to be the optimal point. Summary of the invention

[0006] In order to solve the above technical problems, the present invention proposes a radiation source positioning method based on spatial analysis and radio wave propagation model, the method comprising the following steps:

[0007] Step 1: Collect multiple types of digital maps of a predetermined area and unify the coordinate systems and data formats of the multiple types of maps; generate a unified multi-dimensional digital map for positioning

[0008] Step 2: Establish an antenna database and perform data modeling on the own radiation source and the external radiation source;

[0009] Step 3, plotting the specific deployment locations of the own radiation sources and the external radiation sources on the multi-dimensional digital map generated in step 1;

[0010] Step 4, selecting points at a predetermined interval in the surrounding area of ​​the deployment location of the own radiation source;

[0011] Step 5, performing terrain analysis based on the digital elevation data in the multidimensional digital map generated in step 1, extracting the terrain elevation value and slope value of each point selected in step 4 point by point, judging the relative elevation of each point relative to the location of the own radiation source, and whether there is any obstruction in the transmission of the radiation wave of the own radiation source to each point; and giving a first evaluation value according to the judgment result;

[0012] Step 6, based on the multi-dimensional digital map surface coverage data generated in step 1, extract the surface coverage parameters point by point, determine whether each location point can be set up with the antenna device of the own radiation source, and whether the set up antenna device has concealment; and give a second evaluation value according to the concealment;

[0013] Step 7, based on the navigation data, calculate point by point the shortest road travel distance between the location point where the own radiation source is expected to be set and the starting point, evaluate the radiation source transportation capacity according to the distance between the location point of the own radiation source and the starting point, the road grade and the width, and give a third evaluation value;

[0014] Step 8, based on the antenna database generated in step 2 and according to different radio wave propagation models, the radiation attenuation value from the location point of the local radiation source to the external radiation source is calculated point by point, and the suppression power of the local radiation source is calculated according to the calculated attenuation value; the fourth evaluation value is given by the suppression power;

[0015] Step 9, establishing an orthogonal calculation table based on the first to fourth evaluation values ​​generated according to the actual geographical conditions of the location point of the own radiation source to the external radiation source, and calculating the best location point of the own radiation source based on the orthogonal calculation table.

[0016] As described in the method of the present invention, the multiple types of digital maps include: digital map elevation models, digital maps of land cover, digital satellite images and digital maps of navigation data.

[0017] As described in the method of the present invention, the first evaluation value includes: the radiation signal is given an evaluation value of 1 to 10 from low to high according to the transmission smoothness.

[0018] As described in the method of the present invention, the second evaluation value ranges from 0 to 10, wherein the second evaluation value of a point where an antenna cannot be installed is 0, and the point is excluded from the range for setting up the radiation source, and a second evaluation value of 1 to 10 is given from low to high according to the concealment of the antenna.

[0019] According to the method of the present invention, the third and fourth evaluation values ​​range from 1 to 10.

[0020] As described in the method of the present invention, step 9 comprises: in the orthogonal calculation table, the weighting coefficients of the first to fourth evaluation values ​​are selected according to a predetermined standard.

[0021] The method of the present invention effectively integrates various types of three-dimensional geographic information data, which can be used to extract and calculate various types of geographic influencing factors and provide decision support for automatic point selection. The present invention creatively integrates and analyzes geographic influencing factors and radio wave propagation attenuation models, establishes an objective automatic point selection evaluation system, and allows the weights of various influencing factors to be adjusted to meet various battlefield requirements, greatly improving the practicality of the software. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a flow chart of a radiation source positioning method based on spatial analysis and radio wave propagation model. DETAILED DESCRIPTION

[0023] The main idea of ​​the present invention is to use satellite images, digital elevation models, surface coverage thematic maps, vector road networks and other data sources based on three-dimensional digital maps, apply GIS spatial analysis technology, extract battlefield environment influencing factors such as terrain, landform, transportation, and surface coverage, and at the same time establish a radio wave propagation model in a virtual three-dimensional geographic scene, calculate the radio wave attenuation, and combine it with the actual battlefield situation. Finally, weighted scores are given to the above factors to select the optimal deployment position.

[0024] The present invention is based on three-dimensional digital maps, uses satellite images, digital elevation models, surface coverage thematic maps, vector road networks and other data sources, applies GIS spatial analysis technology, extracts battlefield environment influencing factors such as terrain, landforms, transportation, and surface coverage, and simultaneously establishes a radio wave propagation model under a virtual three-dimensional geographic scene, calculates radio wave attenuation, and combines the battlefield situation actually mapped, and finally weights and scores the above factors to select the optimal deployment position. The present invention effectively integrates various types of three-dimensional geographic information data, on the one hand, as the data source of the three-dimensional digital map, constructs a three-dimensional geographic scene, and on the other hand, can be used to extract and calculate various types of geographic influencing factors, providing decision support for automatic point selection. The present invention establishes a relatively complete three-dimensional battlefield situation visualization system, and various types of geographical elements such as terrain, landforms, our equipment, the other party's radiation source, and map mapping are effectively expressed, providing basic conditions for automatic point selection. The present invention integrates and analyzes the geographical influencing factors and the radio wave propagation attenuation model, establishes a relatively objective automatic point selection evaluation system, and allows the weights of various influencing factors to be adjusted to adapt to various geographical environment requirements, greatly improving the practicality of the software.

[0025] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0026] The present invention proposes a radiation source positioning method based on spatial analysis and radio wave propagation model, the method comprising the following steps:

[0027] Step 1: Collect multiple types of digital maps of a predetermined area and unify the coordinate systems and data formats of the multiple types of maps; generate a unified multi-dimensional digital map for positioning

[0028] Step 2: Establish an antenna database and perform data modeling on the own radiation source and the external radiation source;

[0029] Step 3, plotting the specific deployment locations of the own radiation sources and the external radiation sources on the multi-dimensional digital map generated in step 1;

[0030] Step 4, selecting points at a predetermined interval in the surrounding area of ​​the deployment location of the own radiation source;

[0031] Step 5, performing terrain analysis based on the digital elevation data in the multidimensional digital map generated in step 1, extracting the terrain elevation value and slope value of each point selected in step 4 point by point, judging the relative elevation of each point relative to the location of the own radiation source, and whether there is any obstruction in the transmission of the radiation wave of the own radiation source to each point; and giving a first evaluation value according to the judgment result;

[0032] Step 6, based on the multi-dimensional digital map surface coverage data generated in step 1, extract the surface coverage parameters point by point, determine whether each location point can be set up with the antenna device of the own radiation source, and whether the set up antenna device has concealment; and give a second evaluation value according to the concealment;

[0033] Step 7, based on the navigation data, calculate point by point the shortest road travel distance between the location point where the own radiation source is expected to be set and the starting point, evaluate the radiation source transportation capacity according to the distance between the location point of the own radiation source and the starting point, the road grade and the width, and give a third evaluation value;

[0034] Step 8, based on the antenna database generated in step 2 and according to different radio wave propagation models, the radiation attenuation value from the location point of the local radiation source to the external radiation source is calculated point by point, and the suppression power of the local radiation source is calculated according to the calculated attenuation value; the fourth evaluation value is given by the suppression power;

[0035] Step 9, establishing an orthogonal calculation table based on the first to fourth evaluation values ​​generated according to the actual geographical conditions of the location point of the own radiation source to the external radiation source, and calculating the best location point of the own radiation source based on the orthogonal calculation table.

[0036] As described in the method of the present invention, the multiple types of digital maps include: digital map elevation models, digital maps of land cover, digital satellite images and digital maps of navigation data.

[0037] As described in the method of the present invention, the first evaluation value includes: the radiation signal is given an evaluation value of 1 to 10 from low to high according to the transmission smoothness.

[0038] As described in the method of the present invention, the second evaluation value ranges from 0 to 10, wherein the second evaluation value of a point where an antenna cannot be installed is 0, and the point is excluded from the range for setting up the radiation source, and a second evaluation value of 1 to 10 is given from low to high according to the concealment of the antenna.

[0039] According to the method of the present invention, the third and fourth evaluation values ​​range from 1 to 10.

[0040] As described in the method of the present invention, step 9 comprises: in the orthogonal calculation table, the weighting coefficients of the first to fourth evaluation values ​​are selected according to a predetermined standard.

[0041] Example

[0042] (1) Collect digital elevation models, land cover, satellite images and navigation data of geographic areas and unify coordinate systems and data formats;

[0043] (2) Establish an antenna database and conduct data modeling of our jammers and the enemy’s radiation sources;

[0044] (3) Plotting the enemy's radiation source locations and our jamming equipment deployment areas on satellite images;

[0045] (4) In the area where our jamming equipment is deployed, select points at fixed intervals;

[0046] (5) Perform terrain analysis based on digital elevation model data, extract terrain elevation and slope values ​​point by point, determine visibility and flatness, and assign scores;

[0047] (6) Based on the surface cover data, extract the surface cover parameters point by point to determine whether it can be erected and its concealment. Points that cannot be erected (such as water areas) are directly excluded and scored according to their concealment capabilities;

[0048] (7) Based on navigation data, calculate the distance to the nearest road point by point, evaluate the traffic capacity based on distance, road grade and width, and assign a score;

[0049] (8) Based on the radio wave propagation model that takes terrain into consideration, the attenuation value to the other party's radiation source is calculated point by point, the suppression power is reversely calculated, and a score is given according to the required suppression power;

[0050] The scores of (5), (6), (7), and (8) are added according to different weights based on the actual geographical situation to obtain the total score, and the point with the highest score is selected as the optimal point.

[0051] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solutions of the embodiments of the present invention and are not intended to limit them. Although the embodiments of the present invention have been described in detail with reference to the above preferred implementation modes, those skilled in the art should understand that the technical solutions of the embodiments of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A radiation source positioning method based on spatial analysis and radio wave propagation model, characterized in that: The method comprises the following steps: Step 1: Collect multiple types of digital maps of a predetermined area and unify the coordinate systems and data formats of the multiple types of maps; generate a unified multi-dimensional digital map for positioning Step 2: Establish an antenna database and perform data modeling on the own radiation source and the external radiation source; Step 3, plotting the specific deployment locations of the own radiation sources and the external radiation sources on the multi-dimensional digital map generated in step 1; Step 4, selecting points at a predetermined interval in the surrounding area of ​​the deployment location of the own radiation source; Step 5, performing terrain analysis based on the digital elevation data in the multidimensional digital map generated in step 1, extracting the terrain elevation value and slope value of each point selected in step 4 point by point, judging the relative elevation of each point relative to the location of the own radiation source, and whether there is any obstruction in the transmission of the radiation wave of the own radiation source to each point; and giving a first evaluation value according to the judgment result; Step 6, based on the multi-dimensional digital map surface coverage data generated in step 1, extract the surface coverage parameters point by point, determine whether each location point can be set up with the antenna device of the own radiation source, and whether the set up antenna device has concealment; and give a second evaluation value according to the concealment; Step 7, based on the navigation data, calculate point by point the shortest road travel distance between the location point where the own radiation source is expected to be set and the starting point, evaluate the radiation source transportation capacity according to the distance between the location point of the own radiation source and the starting point, the road grade and the width, and give a third evaluation value; Step 8, based on the antenna database generated in step 2 and according to different radio wave propagation models, the radiation attenuation value from the location point of the local radiation source to the external radiation source is calculated point by point, and the suppression power of the local radiation source is calculated according to the calculated attenuation value; the fourth evaluation value is given by the suppression power; Step 9, establishing an orthogonal calculation table based on the first to fourth evaluation values ​​generated according to the actual geographical conditions of the location point of the own radiation source to the external radiation source, and calculating the best location point of the own radiation source based on the orthogonal calculation table.

2. The method according to claim 1, characterized in that The various types of digital maps include: digital map elevation models, digital maps of land cover, digital satellite images and digital maps of navigation data.

3. The method according to claim 1, characterized in that The first evaluation value includes: the radiation signal is given an evaluation value of 1 to 10 from low to high according to the transmission smoothness.

4. The method according to claim 1, characterized in that The second evaluation value ranges from 0 to 10, wherein the second evaluation value of a point where an antenna cannot be installed is 0, and the point is excluded from the range of setting up the radiation source. The second evaluation value is given from low to high according to the concealment of the antenna: 1 to 10.

5. The method according to claim 1, characterized in that The third and fourth evaluation values ​​range from 1 to 10.

6. The method according to claim 1, characterized in that Step 9 includes: in the orthogonal calculation table, the weighting coefficients of the first to fourth evaluation values ​​are selected according to a predetermined standard.

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