RU2596852C1 - Radar information display method - Google Patents

Abstract

FIELD: radar.

SUBSTANCE: invention relates to methods of displaying radar information on screens of radar station displays. Said result is achieved by receiving, by a radar station, radio signals reflected from objects, converting signals received from objects in digital form, displaying converted signals on a flat screen in form of light marks on z0y plane, and azimuth and range scales in form of crossing lines also on z0y plane, wherein screen plane z0y is virtually inclined in planes z0x and y0x, mark from an object is transferred in parallel to axis 0z and is indicated above inclined plane of screen by a value of height of object and converted to virtual mark, to said virtual mark is added a dash in parallel to axis 0z, with a scale of height on dash, in direction of inclined plane of screen, dash of height by end rests in virtual mark from an object, and by second end rests on point of actual values of azimuth and range of object on inclined screen, on which is displayed point with values of azimuth and range of object relative to point of radar station, and inclined plane of screen displays either earth horizon plane or plane of earth's surface relative to point of radar station (depending on operating mode of radar station), wherein length of dash of height, with a scale of height, characterises height of object over horizon or above ground level (depending on operating mode of radar station). Speed and direction of movement of object in space are displayed by dash-speed vector, beginning of which rests against displayed virtual object mark, and direction of dash-velocity vector characterises direction in space relative to point of radar station, and also on dash-velocity vector a speed scale is applied, which characterises value of speed of object in space, and plane, which characterises earth's surface, is displayed as part of spherical surface, radius of which is proportional to radius of earth at point of radar station, and perimeter of spherical surface is limited by radar detection range, while radius of spherical surface is rapidly changed according to operator request from proportional radius of earth to infinity, thereby turning curvature line of earth into straight line, that is into a horizon line, and inclination of planes z0y and y0x is varied from 0 to 90 degrees, thereby converting isometric image of space observed by radar into a Cartesian image, and pseudo-volumetric four-dimensional image into three-dimensional image plane, that is into a three-dimensional indicator azimuth - range - speed or into three-dimensional indicator range - height - speed, and plane, which characterises earth's surface, is turned at desire of operator about axis, crossing point of radar station and perpendicular in this point to plane of earth's surface. Near point of reflecting object, at desire of operator, model-portraits objects taken from database of radar station are displayed, configuration of which is proportional to configuration and size of detected objects.

EFFECT: technical result is improved reliability and information value of radar information on parameters of aerial, surface and ground objects.

1 cl, 4 dwg

Description

The invention relates to indicator devices of radar stations (radar), and in particular to methods of displaying radar information from air, surface and ground objects.

A known method of displaying radar information on one flat screen in three coordinates is azimuth - elevation - range, which consists in the fact that the azimuth - elevation indicator for an approximate indication of range (third coordinate) displays a mark in the form of so-called wings, when horizontal dashes are added to the left and right marks. (Radar devices (theory and principles of construction). / Ed. By V.V. Grigorin-Ryabov. M.: Soviet Radio, 1970, pp. 283-286).

The disadvantage of this method is the low accuracy of information retrieval, the operator’s lack of sensation of a real image of the monitored radar space and, as a result, the likelihood of errors when reading information from the indicator and the inability to display and evaluate the speed, as well as the direction of movement of the object in space.

Known methods for displaying radar information from airborne objects in a three-dimensional coordinate system on one flat azimuth screen - range in the form of brightness marks that vary in color depending on the angular position or flight height of an airborne object relative to the radar (RU 2237260, class G01S 7/04 2004 ; JP 60200182, CL G01S 7/12, 1985). Changing the color of objects on the screen in this method provides a separation of the images of closely spaced objects or overlapping sections of the coastline in the form of a receding cascade of partially overlapping similar multicolored images.

The disadvantage of these display methods is the ambiguity of the display of the angular position of airborne objects due to the difference in color perception by different radar operators and, as a result, the appearance of errors. In addition, in these devices there is no possibility of a visual assessment of the speed and direction of movement of an object in space.

There is a method of displaying radar information from airborne objects in a three-dimensional radar coordinate system in the form of brightness marks on separate indicators azimuth - range and range - height (elevation angle), located on one panel, and display azimuth and range scales in the form of intersecting lines on one plane screen, and long-range and high-altitude lines on another flat screen (Reference on the basics of radar technology / Ed. by V.V. Druzhinin. M: Military publishing house, 1967, pp. 406-416). The method described in the aforementioned reference book is practically implemented in the PRV-11 and PRV-13 radio altimeters and consists in placing two separate flat azimuth-distance and distance-altitude (elevation) screens on one panel, connected at the inputs to the outputs of the radar information channels (elevation, high-altitude and rangefinder). On the azimuth - range indicator, a scale grid is displayed in the form of azimuthal and range lines, and on the azimuth - range indicator, a scale grid is displayed in the form of range and elevation lines.

The disadvantage of this method is the inability to display on one screen the three coordinates of the object (azimuth - height (elevation) - range), speed and direction of movement of the object in space. This, in turn, necessitates the use of several operators, since at a high rate of data output, due to the lack of natural spatial perception of information on different indicators, one operator is not able to provide accurate information in large volume and at high speed. In addition, information on the speed of movement of the object and the direction of movement in space on these indicators is missing, and it is impossible to implement them.

The closest in content is the method of displaying radar information described in patent RU 2549350 C1, cl. G01S 7/04 (2006, 01). The method for displaying radar information described in this patent allows you to simultaneously see the range, azimuth, altitude, direction of movement and speed of the object on the screen, but without taking into account the curvature of the earth. The object itself is depicted as a point and there is no possibility of a visual relative assessment of the characteristics of the object: its class and size. In addition, it is not possible to quickly convert an isometric image to an image in Cartesian coordinates, as well as the ability to rotate, at the request of the operator, a plane displaying the earth’s surface around an axis passing through the radar’s standing point and perpendicular to the earth’s plane at this point, which does not allow tactical situations with a deterioration in the accuracy characteristics of some parameters improve others.

The aim of the invention is to increase the reliability and informativeness of radar information on the parameters of air, surface and ground objects.

The technical result is achieved by the fact that in the proposed method for displaying radar information, which includes receiving by the radar station the radio signals reflected from objects relative to the location of the radar, converting the signals received from the objects into digital form, displaying the converted signals on a flat screen in the form of light marks on the z0y plane, and azimuthal and long-range scales in the form of intersecting lines also on the z0y plane (Fig. 1), and to display information about the height, direction of movement and speed the object’s spacers in space, the plane of the screen depicted on the z0y plane is virtually tilted in the z0x and y0x planes (Fig. 2), while the mark from the object is transferred parallel to the 0z axis and highlighted above the tilted plane of the screen by the measured radar height of the object and turned into a virtual mark, a dash is added to this virtual mark of the object parallel to the 0z axis, with a height scale on the dash, in the direction of the inclined plane of the screen, while one dash of the height rests on the virtual mark from the object, and the second at the end they rest against the point of the real azimuth and range of the object on an inclined screen, on which a point with the values of the azimuth and range of the object relative to the radar’s standing point is displayed, and the inclined screen plane displays either the earth’s horizon plane or the earth’s plane relative to the radar’s standing point (in depending on the mode of operation of the radar), while the length of the height line, with a height scale, characterizes the height of the object above the horizon or above the ground (depending on the mode of operation of the radar), and the speed the equation of movement of an object in space is displayed by a dash-velocity vector, the beginning of which rests on the displayed virtual mark of the object, and the direction of the dash-velocity vector corresponds to the direction of movement of the object in space relative to the radar's standing point, and in addition to this, a speed scale is applied to the dash-velocity vector, which characterizes the magnitude of the velocity of the object in space, and the plane characterizing the surface of the earth is displayed as part of a spherical surface, the radius Otori proportional to the radius of the earth at the point of standing radar. The perimeter of the spherical surface is limited by the radar detection range, at the same time, the radius of the spherical surface is promptly changed by the operator’s desire from the proportional radius of the earth to infinity, thereby turning the curvature of the Earth’s line into a straight line, that is, into the horizon, and the inclination of the z0y and y0x planes from 0 to 90 degrees, turning the isometric image of the radar space being monitored into a Cartesian image, and the pseudo-volume four-dimensional image into a three-dimensional planar image, i.e., into An even indicator azimuth - range - speed or a three-dimensional indicator range - height - speed, and the plane characterizing the earth’s surface is rotated at the request of the operator around an axis passing through the radar’s standing point and perpendicular to the earth’s plane at this point, and next to the point , depicting the object, display, at the request of the operator, model portraits of objects taken from the radar data bank, the configuration of which is proportional to the configuration and size of the detected objects.

Comparison of the proposed method with known methods shows that it has a new set of essential features that can successfully implement the goal.

The essence of the proposed technical solution becomes even more clear from the graphic material attached to it.

In FIG. 1 schematically shows a two-dimensional azimuth indicator - the range of the radar's circular view.

In FIG. Figure 2 schematically shows the conversion of a two-dimensional azimuth - range indicator into a four-dimensional radar indicator azimuth - range - altitude - speed due to the inclination, for example, of the z0y plane by 45 degrees in the z0x plane (as a special case when tilting from 0 to 90 degrees).

In FIG. Figure 3 schematically presents, as examples, images of model portraits of objects of the “big plane”, “small plane” and “rocket” classes, the sizes of which are proportional to real objects and which are available in the database of radar object portraits.

In FIG. Figure 4 schematically shows the evolution of the transformation of the four-dimensional indicator azimuth - range - altitude - speed into a two-dimensional indicator range - altitude.

For a better understanding of the conversion of one type of indicator to other types, a video film is attached to the application (on a CD).

Claims (1)

A method for displaying radar information, including the reception by a radar station of radio signals reflected from objects relative to a radar location, converting signals received from objects into digital form, displaying the converted signals on a flat screen in the form of light marks on the z0y plane, and azimuthal and long-range scales in the form of intersecting lines also on the z0y plane, to display information about the height, direction of movement and speed of the object in space, the plane of the screen depicted on the plane bones z0y, virtually tilt in the planes z0x and y0x, while the mark from the object is transferred parallel to the 0z axis and highlighted above the tilted plane of the screen by the value of the measured radar height of the object and turn into a virtual mark, and a dash parallel to the 0z axis is added to this virtual mark of the object , with a height scale on the dash, in the direction of the inclined plane of the screen, while the dash of height at one end rests against the virtual mark from the object, and the second end rests at the point of the real azimuth and range of the object on an inclined screen, on which a point is displayed with the azimuth and range of the object relative to the radar’s standing point, and the tilted screen plane displays either the earth’s horizon plane or the earth’s surface plane relative to the radar’s standing point (depending on the radar’s operating mode), while the height bar , with a height scale, characterizes the height of the object above the horizon or above ground level (depending on the radar operating mode), and the speed and direction of movement of the object in space is displayed by a dash-century a velocity omen, the beginning of which rests on the displayed virtual mark of the object, and the direction of the dash-velocity vector characterizes the direction of movement of the object in space relative to the radar's standing point, and in addition to this, the velocity scale is applied to the dash-velocity vector, which characterizes the velocity of the object in space, characterized in that the plane characterizing the surface of the earth is displayed as part of a spherical surface whose radius is proportional to the radius of the earth at the point of standing The radar, and the perimeter of the spherical surface is limited by the radar detection range, at the same time, the radius of the spherical surface is promptly changed by the observer’s desire from the proportional radius of the Earth to infinity, thereby turning the curvature of the earth line into a straight line, that is, into the horizon line, and the tilt of the planes z0y and y0x change from 0 to 90 degrees, turning the isometric image of the monitored radar space into a Cartesian image, and the pseudo-volume four-dimensional image into a three-dimensional plane image, then there is an azimuth - range - speed indicator in a three-dimensional indicator or a range - altitude - speed in a three-dimensional indicator, and the plane characterizing the earth’s surface is rotated at the request of the operator around an axis passing through the radar’s standing point and perpendicular to the earth’s plane at this point, and nearby with a point representing the object, portraits of objects taken from the radar data bank, the configuration of which is proportional to the configuration and size of the detected objects, are displayed at the operator’s request.

Images