JPS605910B2 - Waiting and tracking method for missiles, etc. - Google Patents

Description

[Detailed Description of the Invention] This invention is capable of automatically switching the tracking of high-speed weapons such as missiles that are launched toward the user from the target being tracked while capturing and tracking an aircraft or ship. This paper proposes a tracking method that does this.

If an emergency target such as a missile is launched towards the target while it is being tracked by a tracking radar, conventionally, if an emergency target such as a missile is fired towards the target, the operator can manually change the target to the aircraft or ship that was being tracked. I had new urgent goals to deal with.

However, with this method, it is extremely difficult to use radar to detect and track missiles and the like in a short period of time.

This invention aims to improve these conventional problems, and proposes an effective method for automatically switching the radar tracking target from the previously tracked target to an emergency target with a simple operation. It is something.

Hereinafter, this invention will be explained in detail using figures.

In FIG. 1, 1 is a main tracking system, and 2 is a standby tracking system. The main tracking system 1 is composed of a video gate circuit 3a, an error detection circuit 4, a gate signal position setting circuit 5, and a gate signal generation circuit 6. has been done.

On the other hand, the standby tracking system 2 includes a video gate circuit 3b, a gate signal moving circuit 7, and a standby gate signal generating circuit 8.

9 is a video input signal from the target, which is input to the video gate circuits 3a and 3b.

10 is a time division control circuit which receives a standby preparation mode signal 15 and provides an output time division signal 11 to a gate signal generation circuit 6 and a standby gate signal generation circuit 8.

Reference numeral 12 denotes a tracking gate signal generated from the gate signal generation circuit 6, which is also applied to the video gate circuit 3a.

13 is a standby gate signal generated from the gate signal generating circuit 8, and 14 is a standby observation gate signal generated from the standby gate signal generating circuit 8, which is a pulsed output synchronized with the time division signal 11.

Note that the mode signal 15 is also input to the standby gate signal generation circuit 8.

In such a configuration, distance tracking of a target is normally performed only by the tracking system 1.

That is, the echo from the target enters the video gate circuit 3a as a video signal 9, and is gated by the gate signal 12 generated from the gate signal generation circuit 6 for each transmission pulse. The video input signal that has passed through the video gate circuit 3 a in this manner is input to the error detection circuit 4 where a position error is detected, and its output is given to the gate signal position setting circuit 5 .

The setting circuit 5 outputs an output based on the input, corrects the temporal position of the gate signal generated from the generator circuit 6, and sends the corrected output back to the gate circuit 3a.
give to

That is, the tracking system 1 continuously forms a servo loop for each transmission pulse.

By the way, the operator usually uses A scope (ship scope)
Alternatively, since echoes from the target are monitored using a PPI scope (PP1scope), if a missile or the like is launched from the tracked target during monitoring, it can be seen on the scope.

Therefore, in this case, immediately turn on the standby mode signal 15.
, the standby gate signal generation circuit 8 and the time division control circuit 10 start operating, and the time division signal 11 generated from the control circuit 10 causes the tracking system 1 and the standby tracking system 2 to start operating.
performs time-division operation every time the transmission is repeated.

That is, the time division signal 11 is applied to the two gate signal generation circuits 6 and 8 to control them.

As a result, the tracking gate signal 12 and the waiting gate signal 1
3 are generated alternately and applied to corresponding gate circuits 3a and 3b, respectively.

Therefore, the video input signal 9 from the target is transmitted to the gate circuit 3a.
and 3b, they are introduced alternately into the two tracking systems.

When the standby preparation mode signal 15 is input in this manner, the radar continues tracking the target it was tracking up to that point, and at the same time waits for a new target such as a missile.

The temporal relationship of each signal in this operation is as shown in FIG. 3, and the standby gate signal 13 is created by leading the tracking gate signal 12 by a fixed time r.

(In terms of distance, this means that the standby position is a certain distance before the target.) Therefore, missiles etc. launched towards you from the target you are tracking with the tracking gate signal will be placed in the standby position after a predetermined time. The echo from the new target is also input as a video signal to the video gate circuit 3b, and is applied to the gate signal moving circuit 7 by the action of the standby gate signal 13.

By detecting this video input, the moving circuit 7 drives the gate signal position setting circuit 5 to match the center position of the tracking gate signal 12 generated from the gate signal generation circuit 6 with the center position of the standby gate signal 13. Note that the time division control circuit 10 stops the time division operation after temporal alignment of the tracking gate signal 12 and the standby gate signal 13.

As a result, only the tracking system 1 operates, and the tracking system 1 tracks the new target.

By doing this, the center of the tracking gate signal generated from the tracking system 1 is instantaneously transferred to the position of the missile, etc.
After that, the tracking loop is activated to continuously track missiles, etc. FIG. 2 is a diagram for explaining the gain adjustment of the video signal from the target that enters the tracking system, in which 16 is the radar reception signal, 17 is the mixer circuit, 18 is the intermediate frequency amplifier circuit, 19 is the detection circuit, This is Futagawa's video amplification circuit.

Note that the output of this amplifier circuit 20 is the video input signal 9 in FIG.

21a is a main tracking system AG which inputs the output of the amplifier circuit 20;
It is a C circuit, and is composed of a video gate circuit 22 and an AGC amplifier circuit 23.

2 1 b is a standby observation system AGC circuit that receives the output of the amplifier circuit as input, similar to the main tracking system AGC circuit 2 1 a, and includes the video gate circuit 2 2 and the AGC amplifier circuit 2 .
It is composed of 3.

That is, 21a and 21b are connected in parallel. 24 is a time division circuit which receives as input the output of the AGC amplifier circuit 23 forming the two AGC circuits 21a and 21b.

The gate circuit 22 of the AGC circuit 21a is controlled by the tracking gate signal 12, and the gate circuit 22 of the AGC circuit 21b is controlled by the standby observation gate signal 14.

In such a configuration, when the standby preparation mode signal 15 is not input, time division operation is not performed, and the output of the AGC circuit 21a is fed back to the intermediate frequency amplifier circuit 18, but the output of the AGC circuit 21b is fed back. do not have.

In other words, "The radar's RF reception signal 16 is sent to the mixer circuit 1.
After being converted to an intermediate frequency (IF) by 7, the wave is amplified by an amplifier circuit, detected by a wave detection circuit 19, and converted into a video signal, which is sent to the tracking system 1 and AOC circuits 21a and 2.
1b led.

At this time, AGC circuit 2! The gate signal 14 is not input to the gate circuit 22 of b, and one AGC circuit 2
Since the tracking gate signal is input to the gate circuit 22 of 1a, only the signal input to the AGC circuit 21a is gated and fed back to the amplifier circuit 18 through the corresponding amplifier circuit 23 and time division circuit 24.

That is, the amplitude of the video signal in the tracking gate signal is made constant.

This loop is an AGC loop when tracking a target such as an aircraft or an identification stand.

Next, when the standby preparation mode signal 15 is input, the time division signal 11 is generated, causing the time division circuit 24 to operate in time division,
On the other hand, gate signals 12 and 14 are generated alternately for each transmission pulse and applied to the corresponding gate circuits.

Therefore, the AGC circuits 2 1a and 2 1b operate alternately, and AG〇 rape is 1 8 → 1 9 → 20 for each transmission pulse.
→21a→24→18 and 18→19→20→21b
→24→18.

The former AGC loop serves to keep the video amplitude of a tracked target constant, and the latter AGC loop serves to keep the video amplitude constant from a target such as a waiting missile.

FIG. 4 shows these time relationships.

Incidentally, since the AGC response time of an intermediate frequency amplifier is generally about several tens of seconds, the AGC loop can be switched using the time between the maximum distance of the radar and the transmission trigger.

Therefore, by sending a video signal having a constant amplitude to the distance tracking system described above, a standby tracking operation can be performed.

Since the present invention is configured as described above, it is possible to deal with an emergency target such as a missile launched from a tracking target, and to automatically track the target without losing sight of it.

In addition, although the case of a tracking radar has been explained above, TrackWhitesca using a general search radar
It can also be applied to the case of target tracking using n or the like.

However, in this case, it is necessary to use LoGAM (logarithmic amplifier) instead of AGC to keep the video amplitude constant.
In addition, in the above explanation, the standby and tracking system is activated when the launch of a missile, etc. is confirmed; If this is expected, a preparation mode signal may be input in advance to put the standby tracking system into operation.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the tracking system according to the present invention, FIG. 2 is a block diagram showing the configuration of the automatic gain control system, and FIG. 3 is a diagram showing the time relationship of each gate signal with respect to the radar transmission trigger. , FIG. 4 is a diagram showing the relationship between the standby preparation mode signal and each gate signal, where 1 is the main tracking system, 2 is the standby tracking system, 3a and 3b are video gate circuits, 4 is an error detection circuit, and 5 is a gate. 1 is a signal position setting circuit, 6 is a gate signal generation circuit, 7 is a gate signal moving circuit, 8 is a standby gate signal generation circuit, 9 is a target video input signal, 1 is a time division control circuit, 11 is a time division signal, 12 is a Tracking gate signal, 13 is a standby gate signal, 14 is a standby observation gate signal, 15 is a standby preparation mode signal, 16 is a radar reception signal, 17 is a mixer circuit, 18 is an intermediate frequency amplification circuit, 19 is a detection circuit, 2 Kawama video amplifier circuit, 21
a is the main tracking system AGC circuit, 21b is the standby observation system AG
It is a C circuit. In addition, the same or corresponding parts in the figures are indicated with the same reference numerals.

Claims (1)

[Claims] 1 It has a main tracking system and a standby tracking system, and when an emergency target such as a missile launched from the target in your direction is recognized while tracking the target with the main tracking system, or if an emergency target such as a missile etc. When a launch is expected, the standby gate signal is generated from the standby tracking system, and the main tracking system and the standby tracking system are operated in a time-sharing manner, so that the video input signal from the emergency target such as the missile is sent to the standby gate signal. A standby tracking system for missiles, etc., in which the operation of the standby tracking system is transferred to the main tracking system when the target enters the signal, and the main tracking system then tracks the emergency target.