Method for confronting semi-active laser guidance system

Abstract

The invention discloses a method for confronting a semi-active laser guidance system, comprising a laser alarm device and a confronting device, and the confronting method comprises the following steps: step 1, discovering an enemy laser target indication signal through the laser alarm device; step 2, acquiring the orientation of the enemy laser target indicator according to the enemy laser target indication signal; and step 3, destroying the enemy laser target indicator through the confrontation equipment. The confrontation semi-active laser guidance system disclosed by the invention attacks the enemy laser target indicator, destroys the enemy laser guidance system and protects the target of our party by taking the enemy laser target indication signal as the guidance signal of our party. Due to the fact that the laser warning device only needs to detect the direction of the enemy laser target indicator and does not need to decode codes of the enemy laser target indicator, technical requirements and confrontation difficulty are greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of laser confrontation, in particular to a method for confronting a semi-active laser guidance system. Background Art

[0002] Semi-active laser guidance systems generally include laser-guided weapons and laser target indicators. Ground laser target indicators are generally used for air-to-ground coordination, indicating targets for air-to-ground laser-guided missiles and bombs, and can also indicate targets for laser-guided artillery shells. They are one of the main threats faced by important ground targets such as tanks, armored vehicles, command vehicles, missile launchers, and fixed command posts. At present, the methods of countering semi-active laser guidance systems are mainly aimed at laser-guided weapons. The countermeasures are mainly laser angle deception interference, laser high repetition rate interference, and passive smoke interference. By interfering with and blocking its guidance link, laser-guided weapons are deflected and confused, thereby achieving the purpose of protecting important ground targets. The disadvantage of these countermeasures is that they are relatively passive and can only provide protection when missiles or bombs attack, and cannot prevent the enemy's next attack. These three countermeasures also have some other limitations, such as laser angle deception interference requires cracking the encoding of the enemy's laser target indication signal, laser high repetition rate interference has high requirements on the performance of the laser jammer, and passive smoke interference is greatly affected by meteorological conditions. Summary of the invention

[0003] The object of the present invention is to provide a method for countering a semi-active laser guidance system to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A method for countering a semi-active laser guidance system, comprising a laser warning device and a countermeasure device, wherein the countermeasure method comprises the following steps:

[0006] Step 1: Detect the enemy laser target indication signal through the laser warning device;

[0007] Step 2, obtaining the position of the enemy laser target indicator according to the enemy laser target indication signal;

[0008] Step 3: Destroy the enemy's laser target indicator through countermeasure equipment.

[0009] As a further solution of the present invention: in step 3, the position of the laser threat source is sensed through the enemy laser target indication signal.

[0010] As a further solution of the present invention: the countermeasure device includes a guided missile and a launch component. The launch component controls the guided missile to point to the direction of the enemy threat source under the azimuth guidance of the laser warning device, and launches after capturing the enemy's laser guidance signal.

[0011] As a further solution of the present invention: the head of the guided missile seeker is equipped with a four-quadrant detector for detecting laser signals, and the detected laser includes both the direct laser of the enemy laser target indicator and its forward scattered laser.

[0012] As a further solution of the present invention: the detector of the seeker includes a four-quadrant detector, a narrow-band filter, an optical lens, and a window. The central wavelength of the narrow-band filter should be the same as the wavelength of the laser signal. The four-quadrant detector should be placed out of focus to ensure a larger light spot. The deviation between the center of the light spot and the center of the detector is used as an error signal during the flight of the missile.

[0013] As a further solution of the present invention: the laser warning device and the countermeasure device are both signal-connected to a command and control device, and the command and control device receives the laser warning device and the countermeasure device signals and outputs control signals.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention discloses a countermeasure against a semi-active laser guidance system, which uses the enemy's laser target indication signal as our guidance signal. Our laser warning equipment only needs to detect the position of the enemy's laser target indicator without deciphering its code, which greatly reduces the technical requirements and the difficulty of confrontation. By destroying the enemy's laser guidance system, our target can be protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the composition of the confrontation system of this embodiment; DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1In an embodiment of the present invention, a method for countering a semi-active laser guidance system is provided, which destroys the opponent's laser target indicator by hard destruction. After detecting the enemy's laser target indication signal, the opponent's laser target indication signal is used as our guidance signal to control our missile to reversely attack the opponent's laser irradiation source, so as to achieve the purpose of destroying the opponent's laser target indicator and its guidance system, thereby protecting our target, including laser warning equipment and countermeasure equipment, the laser warning equipment and countermeasure equipment are both signal-connected to the command and control equipment, the command and control equipment receives the laser warning equipment and countermeasure equipment signals and outputs control signals;

[0018] The countermeasure method includes the following steps:

[0019] Step 1: Detect the enemy laser target indication signal through the laser warning device;

[0020] Step 2: Obtain the position of the enemy laser target indicator according to the enemy laser target indication signal. In this embodiment, the position of the laser threat source is sensed by the enemy laser target indication signal, and the laser warning device intercepts the enemy laser target indication signal and determines its incoming position. This method only needs to identify the position information of the threat source without decoding the coded laser signal, which greatly reduces the technical difficulty.

[0021] Step 3, destroy the enemy's laser target indicator by countermeasure equipment. In this embodiment, the countermeasure equipment includes a guided missile and a launch assembly. The head of the guided missile seeker is equipped with a four-quadrant detector for detecting laser signals. The detected laser includes both the direct laser of the enemy laser target indicator and its forward scattered laser. The detector of the seeker includes a four-quadrant detector, a narrow-band filter, an optical lens, and a window. The central wavelength of the narrow-band filter should be the same as the wavelength of the laser signal. The four-quadrant detector should be placed out of focus to ensure a larger light spot. The deviation between the center of the light spot and the center of the detector is used as an error signal during the missile flight. The launch assembly controls the guided missile to point to the direction of the enemy threat source under the azimuth guidance of the laser warning device, and launches after capturing the enemy's laser guidance signal.

[0022] In summary, the laser warning device of this embodiment intercepts the laser target indication signal, obtains its incoming direction information, and then sends it to the command and control device; the command and control device makes a combat decision based on the incoming threat target, controls the missile launch device to turn to the threat source direction, controls the laser-guided missile to point to and lock the target; the command and control device issues an ignition command, and the missile is launched until it hits the target.

[0023] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0024] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for countering a semi-active laser guidance system, characterized in that: Including laser warning equipment and countermeasure equipment, the countermeasure method includes the following steps: Step 1: intercept the enemy laser target indication signal through the laser warning device and issue an alarm; Step 2, analyzing the enemy laser target indication signal to obtain the position of the enemy laser target indicator; Step 3: Destroy the enemy's laser target indicator through countermeasure equipment.

2. A method for countering a semi-active laser guidance system according to claim 1, characterized in that: In step 3, the enemy laser target indication signal is used as a guidance signal for the countermeasure device.

3. A method for countering a semi-active laser guidance system according to claim 1, characterized in that: The countermeasure equipment includes a guided missile and a launch assembly. The launch equipment controls the guided missile to point to the direction of the enemy threat source under the azimuth guidance of the laser warning equipment, and launches after capturing the enemy's laser guidance signal.

4. A method for countering a semi-active laser guidance system according to claim 3, characterized in that: The head of the guided missile seeker is equipped with a four-quadrant detector for detecting laser signals. The detected laser includes both the direct laser of the enemy laser target indicator and its forward scattered laser.

5. A method for countering a semi-active laser guidance system according to claim 4, characterized in that: The detector of the seeker includes a four-quadrant detector, a narrow-band filter, an optical lens, and a window. The central wavelength of the narrow-band filter should be the same as the wavelength of the laser signal. The four-quadrant detector should be placed out of focus to ensure a larger light spot. The deviation between the center of the light spot and the center of the detector is used as an error signal during the missile flight.

6. A method for countering a semi-active laser guidance system according to claim 1, characterized in that: The laser warning device transmits the warning information to the command and control device, which analyzes the direction of the laser target indication signal and then turns the launch device. When the guided missile locks the target, the command and control device sends a launch instruction to the launch device to control the missile launch.

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