JP2001356000A - Tow type flare for aircraft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flare improved for defending an aircraft from a flying body which is guided by an infrared guidance system being enhanced in performances. SOLUTION: This flare is provided for defending the aircraft from the infrared-guided flying body. It is a tow type flare for the aircraft that is formed by connecting in series a plurality of flare materials constituted of a combustive composition and is towed by the aircraft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flare material released to protect its own aircraft when it is tracked or attacked by an infrared-guided flying object such as another aircraft during flight of the aircraft. It is.

[0002]

2. Description of the Related Art Flare materials that produce higher radiant intensity or radiance than airplanes due to the burning composition in order to protect the aircraft from flying objects that track and attack the aircraft with infrared guidance devices, such as air-to-air missiles or surface-to-air missiles. Is emitted and scattered behind an aircraft or a plurality of aircraft (generally referred to as a flare), and the generated light source is used as a decoy (a false target) to guide an attacking flying object.

However, the performance of recent infrared guidance devices for defeating a target has been improved year by year, and the ability to identify a false target as described above has been further improved. Particularly in image processing type infrared guidance devices,
Techniques called "in-gate processing", "correlation tracking processing", and "frequency analysis processing" are employed, and there is a remarkable improvement in performance. The “in-gate processing” is a method of capturing a target aircraft projected as an image of the infrared guidance device, forming a window of the image, and processing only information that fits in the window. Therefore, the flare of the simple backward-emission scattering type described above is outside the gate, and cannot be effective as a false target.

[0004] "Correlation tracking processing" is a method of comparing two images successively captured by an infrared guidance device, that is, a stored reference image and an actual image, and examining the mutual relationship to obtain a false target. Is a method in which even if is present nearby, it is identified by its shape, size, and the like. The “frequency analysis process” is a method of comparing and analyzing the difference in temperature between the target aircraft and the false target, that is, the difference in the wavelength of the emitted infrared light, to prevent interference by the false target.

[0005] As described above, it has become extremely difficult to protect an aircraft from an infrared guiding device having a high performance. One of the methods to enable a high performance infrared guidance device to reach a false target is disclosed in Japanese Patent No. 2675233.
No., published in Japanese Unexamined Patent Publication No. The method is a method of re-detecting the target by disturbing the characteristics of the target received by the infrared guidance device. In this patent publication, the concept is used for the defense of a ship. Specifically, several flare materials are emitted and scattered around the ship, and the target ship is covered with a fake signal to attack the projectile. Disturbing the characteristics of the target captured by.

[0006]

However, the method described in Japanese Patent No. 2675233 is effective for protecting a ship traveling at a low speed, but is applied to an aircraft traveling at a high speed close to the speed of sound. This is extremely difficult, and the publication does not describe any specific technology relating to aircraft defense flares. The present inventors have made intensive efforts on a method for protecting an aircraft from an infrared-guided flying object, and as a result, have accomplished the present invention.

[0007]

SUMMARY OF THE INVENTION The present invention is a flare for protecting an aircraft from infrared guided vehicles, comprising at least two flares of a combustion composition and towing the flares by the aircraft. It is a towing type flare for aircrafts having a connecting means. The at least one flare material is for disturbing the target being received by the infrared guidance device and for re-detecting the target, and at least one flare material is provided.
The other flares are decoys (fake targets) for changing the tracking trajectory of the attacking projectile.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described specifically. FIG. 1 shows an embodiment of the present invention, in which a plurality of flare materials ejected from an aircraft 3 when being tracked and attacked by a flying object 5 provided with an infrared guidance device 6.
1 shows a flare 1 including a, b, c, and d. A plurality of flare materials a, b, c, d are connected in series by means 2 and towed by aircraft 3.

The flying object 5 provided with the infrared guiding device 6 captures and forms the window 4 as image information in the tracking stage as described above. In order to disturb the information received by the infrared guiding device 6, a false target must be formed in the window 4. However, in the conventional back-emission scattering type, it is required that the false target be present in the window 4 for a very short time. Since it was not possible, it was almost impossible to disturb the information received by the infrared guidance device 6. According to the present invention, since the flare material 1 is towed by the connecting means 2 to the aircraft 3, the flare material a is present in the window 4 during the burning time of the flare material a, and has the same flight path as the aircraft 3. Keep. Flare material
The distance between a and the aircraft 3 can be adjusted by the coupling means 2.

[0010] However, at this stage, even if the information captured as a feature of the aircraft 3 is disturbed and enters a state of re-detection, the target of the infrared guidance device 6 during re-detection is The tracking path 7 may remain unchanged without being changed. Then, as a next step, in order to change the target of the infrared guidance device 6 to be tracked from the aircraft 3, the flare material b connected in series with the flare material a after the completion of the combustion of the flare material a or immediately before the decoy ( The fuel is burned as a false target), and is further burned sequentially with the flare materials c and d or at a predetermined time interval. As a result, the capture target of the infrared guidance device 6 is sequentially separated from the aircraft 3. This utilizes the characteristic that the infrared guiding device 6 detects the highest temperature generation point or the highest radiant intensity and luminance in a specific wavelength band in the re-detection stage. The distance between the plurality of flares can be adjusted by the connecting means 2.

[0011] The connecting device 2 may be disconnected from the aircraft 3 from the stage when the infrared guidance device 6 enters the state of re-detection until the stage when the target is changed. May be used in combination with the back emission scattering type flare. Flare material 1 used in the present invention
Preferably, a flare material made of, for example, magnesium and polytetrafluoroethylene, which generates high-intensity infrared light in all infrared bands to disturb the information received by the infrared guide device 6, is used. Further, when assuming the infrared induction device 6, for example, if it is an infrared band of 4 to 5 microns, a flare material based on nitroglycerin or nitrocellulose whose combustion product is carbon dioxide or carbon monoxide is preferable. 800 ° C for 8-12 micron band
Flare materials that have been blended and adjusted to emit gray light of different levels are preferred.

As the flare material used in the present invention, a chaff or the like for obstructing a radar guidance device can be used. Further, as a flare material used for the flare of the present invention, a flying type flare material capable of flying by itself can be used. Further, it is also possible to discharge the flying type flare material from the aircraft 3 in combination with the present invention.

[0013]

According to the towing type flare for aircraft of the present invention, it is possible to protect the aircraft of its own aircraft from tracking and attacking a flying object provided with an infrared guiding device having improved performance.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Towed flare a ~ d Each connected flare material 2 Connecting means 3 Aircraft 4 Window formed by infrared guidance device 5 Flying object 6 Infrared guidance device of flying object 7 Tracking trajectory of flying object

Claims (2)

[Claims] Claims 1. A flare for protecting an aircraft from an infrared-guided projectile, wherein the flare comprises at least two of a combustion composition.
A towed flare for an aircraft, comprising: a plurality of flare materials; and connecting means for towing the flare materials by an aircraft. 2. The towing flare for an aircraft according to claim 1, wherein the at least two flares have means connected in series.