JP2666628B2 - Beam control circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam control circuit in an electronic scanning type radar device.

[0002]

2. Description of the Related Art In an electronic scanning type radar apparatus, a space is scanned by an electronic scanning radar antenna, and when a target is detected, position information for next emission of a beam for the target is obtained, and a direction determined by the position information is obtained. Beam control is performed in which aiming the beam and capturing the target is repeatedly performed on the target that moves every moment. As a result, for example, FIG.
As shown in (1), the beam is emitted from the electronic scanning radar antenna so that it always faces the target.

[0003]

In this conventional beam control circuit, for example, radiation of a beam for detecting one aircraft as a target and processing for tracking the target are performed. Therefore, as shown in FIG. 4A, even when a plurality of aircraft capture a target moving in a formation, only one of them is being tracked. For this reason, as shown in FIG. 4B, when another target other than the target to be tracked is separated, the other target cannot be tracked. As a result, the initial detection of a target for which tracking cannot be continued is delayed.

In this case, in order to detect a target separated from the formation, a beam for searching in all directions in the covered area may be used. It is difficult to apply this method when there is a request to perform the processing in a short time. An object of the present invention is to provide a beam control circuit that enables tracking of a target separated from a formation.

[0005]

A beam control circuit according to the present invention comprises a plurality of target managing means for managing that a plurality of targets are in flight by an external designation, and a position of the target based on beam detection information. The tracking processing means performs tracking processing based on the calculated target detection means and the target position information, and separates the formation target. Beam designating means for designating the beam direction while judging the case. Further, the beam designating means is configured to emit a plurality of beams centering on the target when the target is moving in formation, and to individually emit a beam to each target when the target is separated. Then, the target detecting means includes a plurality of the surroundings.
Detection of separation of target from detection information in beam
It is constituted so that.

[0006]

According to the present invention, the multiple target management means manages whether or not the target is moving in formation, and the beam designating means emits a plurality of beams centering on the target based on the result. When the target is separated, the tracking processing means judges this and outputs the target tracking information, and based on this, the beam designation means emits a beam individually to each target, and can track the separated target. And

[0007]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a beam control circuit according to the present invention. In FIG. 1, a beam control circuit includes a multiple target management circuit 1 for managing that a plurality of targets form a formation by an external designation, a target detection circuit 2 for calculating a target position from beam detection information, and The tracking processing circuit 3 performs the tracking processing based on the target position information, and separates the formation target. When the tracking processing circuit 3 performs the tracking processing, it determines whether or not the formation target exists. It is composed of a beam designating circuit 4 for designating a beam direction.

[0008] In this configuration, the target designation information a is information for designating a target to be moved in the formation, and is information created by human judgment or created by another system. For example, in the case of a radar controller, for example, a human controller may contact a moving pilot or related agency while looking at the display device, limit the possible targets of the formation, and determine its position information or tracking. Indicates the information of the target number in the processing. This information is input to the multiple target management circuit 1.

The multiple target management circuit 1 includes multiple target designation information a
Is stored, whereby all the targets considered to be moving in the formation are grasped, and the information is output to other circuits as plural beam designation information b. When the target moving in the formation is separated, the information of the target managed as the formation is invalidated for the target by the multiple target separation information c from the tracking processing circuit 3 indicating that the target is lost in the formation. age,
It is excluded from the subsequent multiple beam designation information b. As a result, it is possible to limit a moving target as a formation, and it is possible to determine whether to execute a special process for the target.

The beam detection information d indicates amplitude information and position information of each beam reflecting the presence of a target obtained from the electronic scanning type receiving apparatus. The target detection circuit 2 receives this information and the multiple beam designation information b as input and changes processing depending on whether the target is a formation and a moving target, and indicates target position information e indicating the position of the target. . For example, if a target 11 which is a formation and is moving is specified by the plural target specification information a and the beam 11 is emitted in the direction of the target 12 and outside the target 12 as shown in FIG. The circuit 2 measures the amplitude information of each beam, and outputs target position information that can be detected by the beam when the amplitude information is equal to or larger than a predetermined value as target position information e.

As a result, the target that moves very close to the formation and outputs only one beam located at the center has a predetermined amplitude or more, and outputs the position information of one target. When the targets are separated and separated to some extent, the amplitude information of the plurality of beams becomes a predetermined value or more, and the position information of each target in each beam is output. on the other hand,
In the case of a target that is not a formation, only one beam directed to the target is emitted, and when the beam amplitude information is equal to or greater than a predetermined value, the position information is output as target position information e.

The tracking processing circuit 3 receives target position information e indicating the position of the target, and performs tracking processing of the target. However,
When the target specified by the multiple beam specification information b is detected as a plurality of targets by the target detection circuit 2, tracking is started as a new target. If this state continues for a certain period of time, it is determined that the targets moving as a formation have been separated, and multiple target separation information c is output. on the other hand,
The target tracking information f including the smoothing position and the smoothing speed as the tracking processing result is output. For example, a plurality of beams shown in FIG. 2A are radiated to the target for which the plurality of target separation information c is to be output until this information is output, and the target tracking information f of the central unit is output. Is output. After this information is output, as shown in FIG. 2B, a plurality of target tracking information f including a newly started target is output to irradiate an independent beam to each target. I do.

The beam specifying circuit 4 receives the target tracking information f and the plural beam specifying information b, and outputs beam direction information g which is information for specifying a beam direction of an electronic scanning type radar apparatus. For example, for a target designated as a formation by the multiple beam designation information b,
The predicted direction of one target and the directions around it are output as beam direction information g, and for targets not specified to be a formation, the predicted direction of the target is output as beam direction information g.

Although FIG. 2 shows an example in which beams are emitted in nine directions, the greater the number of the directions, the more the position accuracy of target detection can be improved. However, with this,
It takes time and the time margin is reduced. Therefore, this beam direction needs to determine the optimal combination in the system to which the present invention is applied.

[0015]

As described above, according to the present invention, a plurality of beams are emitted to a target moving in a formation, a target separated from the formation is also detected, and beams are individually applied to these targets. Since it is possible to radiate, there is an effect that tracking can be continued even for a target separated from the formation.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a radar control circuit according to the present invention.

FIG. 2 is a schematic diagram for explaining a beam direction in the present invention.

FIG. 3 is a schematic diagram showing a relationship between a beam and a target in the electronic scanning system.

FIG. 4 is a schematic diagram for explaining a conventional beam direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multiple target management circuit 2 Target detection circuit 3 Tracking processing circuit 4 Beam designating circuit 11 Beam 12 Target

Claims (1)

(57) [Claims] 1. A beam control circuit of an electronic scanning type radar device, comprising: a plurality of target management means for managing that a plurality of targets are in formation by an external designation; and a position of the target based on beam detection information. The tracking processing means performs tracking processing based on the calculated target detection means and the target position information, and separates the formation target. and a beam specifying means for specifying the beam direction while determining if the beam specifying means, the target is a formation shift
If the beam is moving,
Radiate multiple beams around the target and when the target is separated
Configure each target to emit a beam individually,
The target detecting means detects the plurality of surrounding beams.
A beam control circuit configured to detect that a target is separated from information .