阅读说明：本技术 一种机载雷达探测区域在数字地图上的投影方法及装置 (Method and device for projecting airborne radar detection area on digital map ) 是由 庞博 刘志男 孙希 于 2020-12-04 设计创作，主要内容包括：本申请属于机载雷达设计领域,涉及一种机载雷达探测区域在数字地图上的投影方法及装置。该方法包括：步骤S1、获取机载雷达的探测射线角度；步骤S2、获取飞机高度及经纬度坐标；步骤S3、计算机载雷达的探测射线与地面的交点经纬度坐标；步骤S4、在数字地图上,将所述交点相连形成机载雷达的探测区域投影。本申请通过将雷达探测区域投影在数字地图上,提供了一种供操作员观察雷达探测区域的方法。因为有了可参照的数字地图,从而提高了操作效率,降低了操作难度,增加了判断依据。(The application belongs to the field of design of airborne radars, and relates to a projection method and device of an airborne radar detection area on a digital map. The method comprises the following steps: s1, acquiring the detection ray angle of the airborne radar; step S2, acquiring the altitude and longitude and latitude coordinates of the airplane; step S3, calculating the longitude and latitude coordinates of the intersection point of the detection ray of the airborne radar and the ground; and step S4, connecting the intersection points on the digital map to form a detection area projection of the airborne radar. The present application provides a method for an operator to observe a radar detection area by projecting the radar detection area on a digital map. Because the digital map which can be referred to is arranged, the operation efficiency is improved, the operation difficulty is reduced, and the judgment basis is increased.)

1. A method for projecting an airborne radar detection area on a digital map is characterized by comprising the following steps:

s1, acquiring the detection ray angle of the airborne radar;

step S2, acquiring the altitude and longitude and latitude coordinates of the airplane;

step S3, calculating the longitude and latitude coordinates of the intersection point of the detection ray of the airborne radar and the ground;

and step S4, connecting the intersection points on the digital map to form a detection area projection of the airborne radar.

2. The method of projecting an airborne radar detection area onto a digital map as defined in claim 1, further comprising:

and step S5, drawing a fan-shaped detection area on the digital map by taking the position of the airplane as an origin according to the detection distance range and the left and right boundary angles of the airborne radar.

3. The method of claim 2, wherein mapping the sector detection area on the digital map comprises:

s51, obtaining the distance range of the detection area of the airborne radar;

s52, acquiring a left boundary angle and a right boundary angle of an airborne radar detection area;

and step S53, drawing a fan-shaped detection area on the digital map.

4. An apparatus for projecting an airborne radar detection area onto a digital map, comprising:

the radar detection angle acquisition module is used for acquiring the detection ray angle of the airborne radar;

the airplane position information acquisition module is used for acquiring the height and longitude and latitude coordinates of an airplane;

the intersection point calculation module is used for calculating the longitude and latitude coordinates of the intersection point of the detection ray of the airborne radar and the ground;

and the graph drawing module is used for connecting the intersection points on a digital map to form a detection area projection of the airborne radar.

5. The apparatus for projecting airborne radar detection areas onto a digital map according to claim 4, further comprising:

and the fan-shaped projection drawing module is used for drawing a fan-shaped detection area on the digital map by taking the position of the airplane as an origin according to the detection distance range and the left and right boundary angles of the airborne radar.

6. The apparatus of claim 5, wherein the sector projection mapping module comprises:

the radar detection distance acquisition unit is used for acquiring the distance range of the airborne radar detection area;

the radar detection angle acquisition unit is used for acquiring a left boundary angle and a right boundary angle of a detection area of the airborne radar;

and the fan-shaped projection drawing unit is used for drawing the fan-shaped detection area on the digital map.

Technical Field

The application belongs to the field of airborne radar design, and particularly relates to a projection method and device of an airborne radar detection area on a digital map.

Background

An important task in radar detection control is to control the detection area. Under the condition of no reference, an operator is difficult to establish an intuitive space concept only by depending on the parameters of the radar, and the operation and judgment are difficult. The detection area is projected on the digital map by combining the digital map, a reference basis is provided for an operator, and the problems can be well solved.

The digital map is displayed on a display, essentially, a spherical surface is expanded into a plane, and a detection area of a radar is projected according to the plane, so that inherent errors exist between the two.

One of the solutions is to increase sampling points of a projection graph, to more finely draw the graph, but the occupation of system resources is brought, but the relative gain improvement is not obvious.

Disclosure of Invention

In order to solve the technical problem, the application provides a projection method and a projection device of an airborne radar detection area on a digital map.

The application provides a projection method of an airborne radar detection area on a digital map, which comprises the following steps:

s1, acquiring the detection ray angle of the airborne radar;

step S2, acquiring the altitude and longitude and latitude coordinates of the airplane;

step S3, calculating the longitude and latitude coordinates of the intersection point of the detection ray of the airborne radar and the ground;

and step S4, connecting the intersection points on the digital map to form a detection area projection of the airborne radar.

Preferably, the method further comprises the following steps:

and step S5, drawing a fan-shaped detection area on the digital map by taking the position of the airplane as an origin according to the detection distance range and the left and right boundary angles of the airborne radar.

Preferably, the drawing of the fan-shaped detection area on the digital map includes:

s51, obtaining the distance range of the detection area of the airborne radar;

s52, acquiring a left boundary angle and a right boundary angle of an airborne radar detection area;

and step S53, drawing a fan-shaped detection area on the digital map.

The second aspect of the application provides a projection device of an airborne radar detection area on a digital map, which comprises:

the radar detection angle acquisition module is used for acquiring the detection ray angle of the airborne radar;

the airplane position information acquisition module is used for acquiring the height and longitude and latitude coordinates of an airplane;

the intersection point calculation module is used for calculating the longitude and latitude coordinates of the intersection point of the detection ray of the airborne radar and the ground;

and the graph drawing module is used for connecting the intersection points on a digital map to form a detection area projection of the airborne radar.

Preferably, the method further comprises the following steps:

and the fan-shaped projection drawing module is used for drawing a fan-shaped detection area on the digital map by taking the position of the airplane as an origin according to the detection distance range and the left and right boundary angles of the airborne radar.

Preferably, the fan projection rendering module includes:

the radar detection distance acquisition unit is used for acquiring the distance range of the airborne radar detection area;

the radar detection angle acquisition unit is used for acquiring a left boundary angle and a right boundary angle of a detection area of the airborne radar;

and the fan-shaped projection drawing unit is used for drawing the fan-shaped detection area on the digital map.

The present invention provides a method for an operator to observe a radar detection area by projecting the radar detection area on a digital map. Because the digital map which can be referred to is arranged, the operation efficiency is improved, the operation difficulty is reduced, and the judgment basis is increased.

Drawings

Fig. 1 is a flowchart of a projection method of an airborne radar detection area on a digital map according to the present application.

FIG. 2 is a schematic view of a radar detection projection of the present application.

FIG. 3 is a schematic view of a sector projection of the radar detection of the present application.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.

In a first aspect of the present application, a method for projecting an airborne radar detection area on a digital map, as shown in fig. 1, mainly includes:

s1, acquiring the detection ray angle of the airborne radar;

step S2, acquiring the altitude and longitude and latitude coordinates of the airplane;

step S3, calculating the longitude and latitude coordinates of the intersection point of the detection ray of the airborne radar and the ground;

and step S4, connecting the intersection points on the digital map to form a detection area projection of the airborne radar.

In the application, the detection area of the radar has two categories, one category uses the radar as an original point, carries out fan-shaped display of constraint by an orientation range and a distance range, and the other category is a quadrilateral area.

1) And (4) a fan shape. The sector origin is a radar seat position coordinate, the sector radius is the radius of a radar detection area, and two sides of the sector are determined by the azimuth angle detected by the radar.

Parameters required for mapping are sent by radar, and include:

the longitude and latitude of the position of the radar can be approximately adopted.

The range of the radar detection zone.

The left boundary angle of the radar detection zone.

The right boundary angle of the radar detection zone.

The projection relationship of the sector radar detection area on the digital map is shown in figure 3.

2) A quadrilateral shape. In this state, the radar screen is a rectangle on the display, so the coordinates of the 4 end points of the rectangle can be extracted and located on the digital map according to the coordinate values, and the 4 points are connected to form a closed figure (because the closed figure is not a rectangle but a quadrangle because of the error of the sphere-to-plane expansion as described above)

The principle of resolving the longitude and latitude coordinates of 4 vertexes of the radar is shown in the attached figure 3. The longitude and latitude coordinate parameters of the 4 vertexes required for drawing are sent by a radar. The latitude and longitude coordinates of the 4 vertices can be obtained as follows.

The 4 vertexes of the radar picture are the intersections of the 4 rays of the radar scanning wave and the ground. Taking point 4 in fig. 3 as an example, the ray angle α is controlled by radar, which is a known quantity. The height H of the machine from the ground is measured by other sensors. Then the relative position relationship between the No. 4 point and the radar can be obtained through the trigonometric function. The longitude and latitude coordinate position of the machine is known, and the radar is fixedly connected to the airplane, so that the coordinate position of the radar is known, and the coordinate of the No. 4 point can be reversely deduced. By analogy, the longitude and latitude coordinates of the 4 vertexes are respectively obtained.

The second aspect of the present application provides a projection device of an airborne radar detection area on a digital map, corresponding to the above method, including:

the radar detection angle acquisition module is used for acquiring the detection ray angle of the airborne radar;

the airplane position information acquisition module is used for acquiring the height and longitude and latitude coordinates of an airplane;

the intersection point calculation module is used for calculating the longitude and latitude coordinates of the intersection point of the detection ray of the airborne radar and the ground;

and the graph drawing module is used for connecting the intersection points on a digital map to form a detection area projection of the airborne radar.

In some optional embodiments, further comprising:

and the fan-shaped projection drawing module is used for drawing a fan-shaped detection area on the digital map by taking the position of the airplane as an origin according to the detection distance range and the left and right boundary angles of the airborne radar.

In some alternative embodiments, the fan projection rendering module comprises:

the radar detection distance acquisition unit is used for acquiring the distance range of the airborne radar detection area;

the radar detection angle acquisition unit is used for acquiring a left boundary angle and a right boundary angle of a detection area of the airborne radar;

and the fan-shaped projection drawing unit is used for drawing the fan-shaped detection area on the digital map.

The present invention provides a method for an operator to observe a radar detection area by projecting the radar detection area on a digital map. Because the digital map which can be referred to is arranged, the operation efficiency is improved, the operation difficulty is reduced, and the judgment basis is increased.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.