Electromagnetic situation fusion display method based on data interpolation

Abstract

The invention relates to the technical field of computer graphic display, in particular to an electromagnetic situation fusion display method based on data interpolation, which comprises the following steps of: 1, subdividing a geographic data space according to equally-spaced longitudes and equally-spaced latitudes in longitude and latitude directions under a geographic coordinate system respectively, and establishing an electromagnetic data grid database; step 2, using electromagnetic spectrum monitoring data and numerical interpolation calculation to obtain an electromagnetic field intensity value in an electromagnetic data space; 3, analyzing the electronic reconnaissance data, carrying out the correlation fusion of the electronic reconnaissance data, forming an electronic target, and obtaining an electromagnetic field intensity value of any point through a radio wave propagation model; 4, calculating field intensity superposition and mutual interference of the electromagnetic field intensity values in the same position, and obtaining a final electromagnetic situation; according to the method, the regional monitoring spectrogram and the radiation source target situation can be combined into the regional electromagnetic spectrum situation, the precision is high, and the expansibility is good.

Description

Technical Field

[0001] The invention relates to the technical field of computer graphics display, and in particular to an electromagnetic situation fusion display method based on data interpolation. Background Art

[0002] Regional electromagnetic situation fusion refers to the sum of all electromagnetic activities and phenomena that may affect the warring entities in a specific area. Influencing the electromagnetic environment means causing changes in the frequency domain or energy domain in a certain area, and being affected by the electromagnetic environment means that the electromagnetic environment may change its performance or operation mode. In terms of content, the electromagnetic situation should include the radiation source target situation, equipment frequency status, electromagnetic environment information, and the analysis and understanding of this information; in terms of data, the electromagnetic situation should be able to provide accurate data support for command and control functions such as electronic countermeasures, spectrum control, and route planning; in terms of form, the electromagnetic situation should be able to provide commanders with rich and easy-to-understand information presentation forms, so that they can better recognize and understand the regional electromagnetic environment. Regional electromagnetic situation generation should be a process of forming an electromagnetic situation from regional electromagnetic environment data and presenting its results.

[0003] The target situation of radiation sources refers to the information such as the location, type, enemy and friend attributes, and frequency parameters of radiation sources in the combat area obtained through passive reconnaissance and data fusion. Its purpose is to locate and identify radiation sources with the help of technical means such as multi-sensor fusion, and to form accurate location information, spectrum feature information, attributes of the two warring parties, and their platforms. Its expression is similar to the traditional target situation, describing and plotting the detected radiation sources in terms of location, basic attributes, spectrum characteristics, etc.

[0004] The current electromagnetic situation is mainly a regional monitoring spectrum map, which fails to effectively deal with the radiation source target situation, and fails to effectively combine the two to form a regional electromagnetic spectrum situation, resulting in low accuracy and poor scalability of the existing electromagnetic situation. Summary of the invention

[0005] The purpose of the present invention is to address the above-mentioned deficiencies and provide an electromagnetic situation fusion display method based on data interpolation, which can combine the regional monitoring spectrum diagram and the radiation source target situation into a regional electromagnetic spectrum situation with high accuracy and good scalability.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for electromagnetic situation fusion display based on data interpolation includes the following steps:

[0008] Step 1: In the geographic coordinate system, the geographic data space is divided along the longitude and latitude directions according to equal intervals of longitude and latitude to establish an electromagnetic data grid database;

[0009] Step 2: Using electromagnetic spectrum monitoring data and numerical interpolation calculation, obtain the electromagnetic field strength value in the electromagnetic data space;

[0010] Step 3: Analyze the electronic reconnaissance data, correlate and fuse the electronic reconnaissance data to form electronic targets, and use the radio wave propagation model to obtain the electromagnetic field strength value at any point;

[0011] Step 4: For the electromagnetic field strength values ​​at the same location, calculate their field strength superposition and mutual interference to obtain the final electromagnetic situation.

[0012] The beneficial effects of the present invention are:

[0013] It can be seen from the above technical solution that by processing electronic reconnaissance data and spectrum monitoring data in digital electromagnetic fusion, the spectrum distribution of the two opposing parties can be obtained, and this method has strong expansion capabilities. Spectrum detection data obtained by other means can also be added to the digital electromagnetic space to participate in fusion processing, thereby improving the accuracy of the electromagnetic spectrum situation; the present invention can combine the regional monitoring spectrum diagram and the radiation source target situation into a regional electromagnetic spectrum situation, with high accuracy and good scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0015] Figure 1 Schematic diagram of the distributed electromagnetic spectrum monitoring system. DETAILED DESCRIPTION

[0016] See also Figure 1 As shown, this embodiment provides an electromagnetic situation fusion display method based on data interpolation, comprising the following steps:

[0017] Step 1: In the geographic coordinate system, the geographic data space is divided according to equally spaced longitudes and equally spaced latitudes along the longitude and latitude directions, and an electromagnetic data grid database is established; in the geographic coordinate system, the geographic data is divided according to equally spaced longitudes and equally spaced latitudes along the longitude and latitude directions, and a two-dimensional plane map is established. The position information on the discrete grid points is represented as (xi, yi), and the data composed of these discrete grid points (xi, yi) constitutes the geographic location data, and its resolution is the number of grid points divided in each direction;

[0018] Step 2: Using electromagnetic spectrum monitoring data, uniform interpolation calculation is performed to obtain the electromagnetic field strength value in the electromagnetic data space;

[0019] For the spectrum intensity monitoring data in the monitoring area, several spectrum intensity data can be interpolated to obtain the electromagnetic field intensity value in any area of ​​the monitoring area. The specific method is as follows: S01. Use formula (1) to calculate the distance d from point A to the radiation source. A , find five points A1, A2, A3, A4, A5 that are close to point A and evenly distributed. Their distances from the radiation source are: d A1 ,d A2 ,d A3 ,d A4 ,d A5 , where formula (1) is:

[0020] S02. Use the distributed spectrum monitoring system to measure the electromagnetic spectrum field strengths of the frequency f at points A1, A2, A3, A4, and A5, which are E1, E2, E3, E4, and E5 respectively;

[0021] S03. Given that the emission field strength of the radiation source is P, use formula (2) to calculate the attenuation values ​​L1, L2, L3, L4, L5 of points A1, A2, A3, A4, and A5 respectively, where formula (2) is: L n =PE n ;

[0022] S04. Based on the GB / T14617.1-93 method and appropriately simplifying it, all coefficients are set as unknown values ​​to be solved. According to formula (3), an ultrashort wave radio wave propagation loss model under typical hilly terrain conditions is proposed, where formula (3) is:

[0023] L n =a1+a2lgf+a3lg(h t h r )+a4lg(h t h r )lgd+a5 lgd

[0024] Where, L (dB) is the radio wave propagation loss; a1, a2, a3, a4 and a5 are coefficients; f (MHz) is the frequency; d (km) is the communication distance; h t (m) and h r (m) are the effective heights of the transmitting antenna and the receiving antenna respectively;

[0025] S05. Use the least squares method to find X = [a1 a2 a3 a4 a5] T The specific method is:

[0026] z i =h i X+v i

[0027] z i =L i

[0028] h i =[1lgf lg(h t h r )lg(h t h r )lgd lgd]

[0029]

[0030] S06. Find the distance D from point A to the radiation source A , the radio wave propagation loss at point A is L A .

[0031] S07. According to formula E A =PL A Calculate the field strength value at point A.

[0032] Step 3: Analyze the electronic reconnaissance data, correlate and fuse the electronic reconnaissance data to form electronic targets, and use the radio wave propagation model to obtain the electromagnetic field strength value at any point;

[0033] The method of electronic reconnaissance data association matching is used to obtain the location and radiation information of the radiation source. The specific method is: according to the identity, carrying relationship, call sign consistency, etc. of the platform and the radiation target, the association analysis is carried out, and then the association score is calculated according to the consistency of the position change trend of the two types of data. When the association score meets the threshold, the association relationship is determined, and the longitude and latitude of the electronic target are updated using the platform position. After obtaining the radiation source information, the electromagnetic spectrum field strength around the radiation source is calculated using the location of the radiation source;

[0034] Step 4: For the electromagnetic field strength values ​​at the same position, calculate the field strength superposition and mutual interference to obtain the final electromagnetic situation;

[0035] The sources of electromagnetic data spatial fusion include two parts: regional spectrum monitoring data and the radiation field strength of each electronic target radiation source in the region. By superimposing the values ​​of the two parts, the fused electromagnetic spectrum field strength can be obtained. The specific superposition method is based on formula E A =Σ K＝1，···，k E Ak Conclude.

[0036] The specific embodiments described herein are merely examples of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the scope of the present invention.

Claims

1. A method for electromagnetic situation fusion display based on data interpolation, characterized in that: The following steps are involved: Step 1: In the geographic coordinate system, the geographic data space is divided along the longitude and latitude directions according to equal intervals of longitude and latitude to establish an electromagnetic data grid database; Step 2: Using electromagnetic spectrum monitoring data and numerical interpolation calculation, obtain the electromagnetic field strength value in the electromagnetic data space; Step 3: Analyze the electronic reconnaissance data, correlate and fuse the electronic reconnaissance data to form electronic targets, and use the radio wave propagation model to obtain the electromagnetic field strength value at any point; Step 4: For the electromagnetic field strength values ​​at the same location, calculate their field strength superposition and mutual interference to obtain the final electromagnetic situation.

2. According to the electromagnetic situation fusion display method based on data interpolation according to claim 1, it is characterized by: In step one, geographic data are divided along longitude and latitude directions in the geographic coordinate system according to equally spaced longitudes and equally spaced latitudes to create a two-dimensional plane map. The location information on discrete grid points is represented as (xi, yi). The data composed of these discrete grid points (xi, yi) constitute geographic location data, and its resolution is the number of divided grid points in each direction.

3. The electromagnetic situation fusion display method based on data interpolation according to claim 1 is characterized by: In step 2, for the spectrum intensity monitoring data in the monitoring area, a plurality of spectrum intensity data can be interpolated by an algorithm to obtain the electromagnetic field intensity value in any area of ​​the monitoring area. The specific method is as follows: S01. Use formula (1) to calculate the distance from point A to the radiation source as d A , find five points A1, A2, A3, A4, A5 that are close to point A and evenly distributed. Their distances from the radiation source are: d A1 ,d A2 ,d A3 ,d A4 ,d A5 , where formula (1) is: S02. Use the distributed spectrum monitoring system to measure the electromagnetic spectrum field strengths of the frequency f at points A1, A2, A3, A4, and A5, which are E1, E2, E3, E4, and E5 respectively; S03. Given that the emission field strength of the radiation source is P, use formula (2) to calculate the attenuation values ​​L1, L2, L3, L4, L5 of points A1, A2, A3, A4, and A5 respectively, where formula (2) is: L n =PE n ; S04. Based on the GB / T14617.1-93 method and appropriately simplifying it, all coefficients are set as unknown values ​​to be solved. According to formula (3), an ultrashort wave radio wave propagation loss model under typical hilly terrain conditions is proposed, where formula (3) is: <h2 style=";text-align:left;direction:ltr">L<h2 style=";text-align:left;direction:ltr"> n <h2 style=";text-align:left;direction:ltr"> =a1+a2lgf+a3lg(h<h2 style=";text-align:left;direction:ltr"> t <h2 style=";text-align:left;direction:ltr"> h<h2 style=";text-align:left;direction:ltr"> r <h2 style=";text-align:left;direction:ltr"> )+a4lg(h<h2 style=";text-align:left;direction:ltr"> t <h2 style=";text-align:left;direction:ltr"> h<h2 style=";text-align:left;direction:ltr"> r <h2 style=";text-align:left;direction:ltr"> )lgd+a5 lgd Where, L (dB) is the radio wave propagation loss; a1, a2, a3, a4 and a5 are coefficients; f (MHz) is the frequency; d (km) is the communication distance; h t (m) and h r (m) are the effective heights of the transmitting antenna and the receiving antenna respectively; S05. Use the least squares method to find X = [a1 a2 a3 a4 a5] T The specific method is: z i =h i X+v i z i =L i h i =[1 lgf lg(h t h r ) lg(h t h r )lgd lgd] S06. Find the distance D from point A to the radiation source A , the radio wave propagation loss at point A is L A ; S07. According to formula E A =PL A Calculate the field strength value at point A.

4. The electromagnetic situation fusion display method based on data interpolation according to claim 1 is characterized by: In step three, the electronic reconnaissance data correlation matching method is used to obtain the location and radiation information of the radiation source. The specific method is: correlation analysis is performed based on the identity, carrying relationship, call sign consistency, etc. of the platform and the radiation target, and then the correlation score is calculated based on the consistency of the position change trends of the two types of data. When the correlation score meets the threshold, the correlation relationship is determined, and the platform position is used to update the longitude and latitude of the electronic target. After obtaining the radiation source information, the position of the radiation source is used to calculate the electromagnetic spectrum field strength around the radiation source.

5. The electromagnetic situation fusion display method based on data interpolation according to claim 1 is characterized by: In step 4, the sources of electromagnetic data spatial fusion include two parts: regional spectrum monitoring data and the radiation field strength of each electronic target radiation source in the region. The values ​​of the two parts are superimposed to obtain the fused electromagnetic spectrum field strength. The specific superposition method is based on formula E A =Σ K＝1，···，k E Ak Conclude.

Images