A radar terminal display method superimposes map information

Abstract

The application relates to a radar terminal display method of superimposed map information and belongs to the technical field of radar terminal display processing. On the basis of a radar B type display mode, map information of a corresponding region is superimposed, key targets (buildings, rivers, roads and the like) are subjected to map reconstruction, and the reconstructed map is adapted to a graphic interface of the B type display through coordinate conversion, the display effect of target position information in a specific region monitoring state of the radar is improved, multi-source information fusion discrimination of the target is realized, and the recognition rate of a subsequent target type is improved.

Description

Technical Field

[0001] This invention belongs to the field of radar terminal display processing technology, and is a new radar information display method that combines traditional radar B-display with map information. Background Technology

[0002] As an indispensable and important component of the radar system itself, the radar display terminal undertakes the important tasks of radar information output and human-computer interaction. Its main function is to intuitively display information such as target position, motion status, characteristic parameters and air situation.

[0003] With the continuous innovation and development of radar technology, radar information display has evolved from dedicated displays to multi-functional displays, placing higher demands on display methods and technologies. Radar display equipment has progressed from CRT analog displays and color CRT analog displays to later color flat-panel digital displays, and the target and terrain information contained in the radar display interface has become increasingly rich. In the early stages of radar development, a single information display mode typically required a specific display, which also became a method of distinguishing radar display methods; for example, displays showing distance information were called distance displays. With the development of radar technology, multiple target information parameters and image information can be displayed on a single screen, and radar displays for different purposes have also developed accordingly. Current radar information display forms include distance displays (A-type, A / R-type), planar position displays (P-type, B-type), altitude displays (E-type), and so on.

[0004] Range display is a one-dimensional display method. As the name suggests, it only displays target range information, using the horizontal offset of the target's light spot from the reference point to represent the target's slant range. Single-dimensional radar displays have certain limitations. Most mainstream radars currently use two-dimensional (range-azimuth) displays, which can provide the target distribution within a planar range and are the most widely used radar display forms. Among these, P-type and B-type displays are the most common. The P-type display uses radial scanning polar coordinates, while the B-type display uses linear scanning rectangular coordinates. The P-type display can provide all information on the plane within the range, while the B-type display is designed for a smaller azimuth range monitored by the radar. Because the P-type display's image distribution is similar to that of general radar systems... Figure 1 Therefore, P-display overlays map information to better display target location information. However, since P-display itself focuses more on displaying all information on the plane, it inevitably loses detail judgment when monitoring a specific location. Summary of the Invention

[0005] Technical problems to be solved

[0006] To avoid the shortcomings of existing technologies, this invention provides a radar terminal display method that overlays map information. The purpose is to introduce map information as a reference when monitoring a specific azimuth range, thereby improving the radar monitoring effect in this application environment.

[0007] Technical solution

[0008] A radar terminal display method with overlaid map information, characterized by the following steps:

[0009] Step 1: Determine map information. After the radar position is fixed, determine the monitoring range area based on the radar position coordinates and determine the corresponding map.

[0010] Step 2: Identify important landmarks within the monitoring range, obtain their coordinate data, and determine the marking method;

[0011] Step 3: Map coordinate transformation, converting latitude and longitude coordinates into a Cartesian coordinate system at the radar station center. After the transformation is complete, map reconstruction is performed.

[0012] Step 4: Map reconstruction and display; finally, the reconstructed map is overlaid on the radar B-type display and the display is adapted.

[0013] A further technical solution of the present invention: Step 1 specifically includes the following sub-steps:

[0014] (1a) Determine the radar position coordinates T D (φ D J D H D ), where φ D J D H D The transformation from the geocentric geodetic coordinate system to the geocentric rectangular coordinate system is based on longitude, latitude, and altitude, respectively. The specific transformation formula is as follows:

[0015]

[0016] Wherein, N is the radius of curvature of the ellipsoidal perigee, and

[0017]

[0018] In the above formula, a is the Earth's semi-major radius, a = 6378137 m; e is the first eccentricity of the ellipsoid, e 2 =0.00669437999013, For the azimuth angle of the large area;

[0019] (1b) Convert the radar site geocentric rectangular coordinate system data to the radar station-centric rectangular coordinate system using the following formula:

[0020]

[0021] Where (X1,Y1,Z1) are the target geocentric rectangular coordinate data;

[0022] (1c) Combine the radar surveillance area range to retrieve map information within the surveillance area.

[0023] A further technical solution of the present invention: Step 2 specifically includes the following sub-steps:

[0024] (2a) Filter key strategic information within the map and extract important landmarks such as roads, rivers, and large buildings;

[0025] (2b) Further determine the information of important landmarks and extract the coordinate data of multiple points.

[0026] A further technical solution of the present invention: Step 3 specifically includes the following sub-steps:

[0027] (3a) Convert the acquired coordinate data of important landmarks into rectangular coordinates of the radar station center;

[0028] (3b) Combine the new coordinates to reconstruct the map, connect the coordinates of each point, and extrapolate and fit the intermediate point to complete the construction of the new map in the spatial rectangular coordinate system of the radar station center.

[0029] A computer system is characterized by comprising: one or more processors, and a computer-readable storage medium for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors cause the one or more processors to implement the method described above.

[0030] A computer-readable storage medium is characterized by storing computer-executable instructions, which, when executed, are used to implement the above-described method.

[0031] Beneficial effects

[0032] This invention provides a radar terminal display method that overlays map information. Based on the radar B-mode display, map information of the corresponding area is overlaid, and key objects (buildings, rivers, roads, etc.) are reconstructed. The reconstructed map is adapted to the graphical interface of the B-mode display through coordinate transformation, which improves the display effect of target location information under radar monitoring of specific areas and realizes multi-source information fusion and discrimination of targets, thereby improving the recognition rate of subsequent target types.

[0033] Compared with existing technologies, it has the following advantages:

[0034] (1) By overlaying map information, the display information of the B-type display is enriched, and the radar's probability of identifying target types is improved;

[0035] (2) It improves the radar's monitoring effect in complex environments and specific monitoring areas. Attached Figure Description

[0036] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0037] Figure 1 This is a schematic diagram of the implementation process of the present invention;

[0038] Figure 2 This is a schematic diagram of the interface after the B-type display overlays and reconstructs the map. The white lines in the diagram represent the road network after the transformation. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Reference Figure 1 The specific implementation steps of this invention are as follows:

[0041] Step 1: Determine map information. After the radar position is fixed, determine the monitoring range area based on the radar position coordinates and determine the corresponding map.

[0042] Step 1 specifically includes the following sub-steps:

[0043] (1a) Determine the radar position coordinates T D (φ D J D H D ), where φ D J D H D The transformation from the geocentric geodetic coordinate system to the geocentric rectangular coordinate system is based on longitude, latitude, and altitude, respectively. The specific transformation formula is as follows:

[0044]

[0045] Wherein, N is the radius of curvature of the ellipsoidal perigee, and

[0046]

[0047] In the above formula, a is the Earth's semi-major radius, a = 6378137 m; e is the first eccentricity of the ellipsoid, e 2 =0.00669437999013, This refers to the azimuth angle of the landmass.

[0048] (1b) Convert the radar site geocentric rectangular coordinate system data to the radar station-centric rectangular coordinate system using the following formula:

[0049]

[0050] Among them, (X1,Y1,Z1) are the target geocentric rectangular coordinate data.

[0051] (1c) Combine the radar surveillance area range to retrieve map information within the surveillance area.

[0052] Step 2: Identify key landmarks. Identify key landmarks within the monitoring range and obtain their coordinate data.

[0053] Step 2 specifically includes the following sub-steps:

[0054] (2a) Filter key strategic information within the map and extract important landmarks such as roads, rivers, and large buildings;

[0055] (2b) Further determine the information of important landmarks and extract the coordinate data of multiple points.

[0056] Step 3: Map coordinate transformation. Convert the latitude and longitude coordinates into the radar station's central spatial rectangular coordinate system. After the transformation is complete, reconstruct the map.

[0057] Step 3 specifically includes the following sub-steps:

[0058] (3a) Convert the acquired coordinate data of important landmarks into rectangular coordinates of the radar station center;

[0059] (3b) Combine the new coordinates to reconstruct the map, connect the coordinates of each point, and extrapolate and fit the intermediate point to complete the construction of the new map in the spatial rectangular coordinate system of the radar station center.

[0060] Step 4: Map reconstruction and display; finally, the reconstructed map is overlaid on the B display, and display adaptation and debugging are performed.

[0061] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the scope of the technology disclosed in the present invention, and such modifications or substitutions should all be covered within the scope of protection of the present invention.

Claims

1. A method of displaying radar terminal information superimposed on a map, characterized by The steps are as follows: Step 1: Determine the map information, after the radar position is fixed, determine the monitoring range area according to the radar position coordinates, and determine the corresponding map; Step 2: Determine the important markers in the monitoring range, obtain their coordinate data, and determine the identification method; (2a) Screen the key strategic information in the map, extract the important markers of roads, rivers, and large buildings; (2b) Further determine the important marker information, and extract the coordinate data of multiple points; Step 3: Map coordinate conversion, convert latitude and longitude coordinates into radar station heart space rectangular coordinate system, after conversion, reconstruct the map; (3a) Convert the important marker point coordinate data obtained into radar station heart space rectangular coordinates; (3b) Combine the new coordinates to reconstruct the map, connect the point coordinates, and extrapolate and fit the intermediate points to complete the construction of the new map in the radar station heart space rectangular coordinate system; Step 4: Map reconstruction display; finally, superimpose the reconstructed map on the radar B type display and perform display adaptation.

2. The radar terminal display method of superimposed map information according to claim 1, characterized in that: Step 1 is specifically as follows: Step 1 specifically includes the following sub-steps: (1a) determining radar site coordinates wherein , , are longitude, latitude and altitude, respectively, the geocentric geodetic coordinate system is converted to the geocentric spatial rectangular coordinate system, and the specific transformation formula is as follows: （1） wherein N the radius of curvature of the spheroid meridian, and （2） In the above formula, a is the length of the semi-major axis of the Earth, a = 6378137 m ; e is the first eccentricity of the ellipsoid, e 2 = 0.00669437999013, is the large prime meridian angle; (1b) Convert the radar machine position geocentric space rectangular coordinate system data to the radar station heart space rectangular coordinate system, the formula is as follows: （3） Where (X1, Y1, Z1) is the target geocentric space rectangular coordinate system coordinate data; (1c) Combine the radar monitoring area range, and call the map information in the monitoring area.

3. A computer system, characterized by One or more processors, a computer readable storage medium, for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the method of claim 1. There are computer executable instructions stored, which instructions are used to implement the method of claim 1 when executed.

4. A computer-readable storage medium, characterized in that ​

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