KR101916732B1

KR101916732B1 - Infrared electric warfare signal generator

Info

Publication number: KR101916732B1
Application number: KR1020160026611A
Authority: KR
Inventors: 김옥휴; 최원석; 장인갑
Original assignee: 국방과학연구소
Priority date: 2016-03-04
Filing date: 2016-03-04
Publication date: 2019-01-30
Also published as: KR20170103552A

Abstract

The present invention relates to an IR jamming code generator capable of defending a platform (traps / airplanes) by deceiving various kinds of IR missiles attacking the entire band of an infrared band in different directions, A jamming code generator for generating a plurality of IR jamming signals for deceiving enemy missiles of the enemy missile searcher; A target / jamming signal (J / S) controller for adjusting the light intensity of the generated analog IR jamming signal according to the intensity of a target signal searchable by an enemy missile searcher; And a plurality of laser diodes for generating laser beams corresponding to the light intensities of the adjusted IR jamming signals based on the IR bands of the enemy missile searcher and outputting IR jamming signals of different IR bands, The code generator generates an IR jamming signal of a different code technique based on the type of enemy missile searcher.

Description

[0001] DESCRIPTION [0002] INFRARED ELECTRIC WARFARE SIGNAL GENERATOR [

The present invention relates to an IR jamming code generator capable of defending its own platform (traps / aircraft, etc.) by cheating various kinds of IR missiles attacking all bands of the infrared band in different directions.

IR electronic warfare jamming technique that can cope with thermally tracking IR missile in near infrared ray band (SWIR: 0.75μm ~ 2.5μm), medium infrared band (MWIR: 3.0μm ~ 5.0μm) and far infrared ray band (LWIR: 8.0μm ~ 15μm) (Code) and its generating device have not yet been developed. Therefore, it is required to develop a technique for generating a broadband IR jamming technique that generates IR jamming signals in multiple for the entire infrared ray band.

In the advanced countries of the world, jamming techniques capable of responding to one or two-generation missiles are well known, but they are not known for 3-4 generations. This is due to the control of technology exports by developed countries and should be developed entirely under their own responsibility.

Therefore, there is an urgent need to develop an IR jamming technique capable of handling infrared rope missiles of Roses stain injection / single spectral imaging method of 3-4 generation as well as a rotation / cone scan method of one or two generations. In this case, as the target tracking function of the infrared band of advanced countries is high - precision, domestic IR jamming technique to defend it requires high precision technology and high jamming effect.

It is an object of the present invention to provide an IR electronic warfare jamming code generator for defending its own platform (traps / aircrafts) by cheating various kinds of IR missiles attacking the entire band of the infrared band in different directions.

According to an aspect of the present invention, there is provided an apparatus for generating an IR electronic jamming technique, including: a jamming code generator for generating a plurality of IR jamming signals for ignoring an enemy missile search unit in an infrared band; A target / jamming signal (J / S) controller for adjusting the light intensity of the generated analog IR jamming signal according to the intensity of a target signal searchable by an enemy missile searcher; And a plurality of laser diodes for generating laser beams corresponding to the light intensities of the adjusted IR jamming signals based on the IR bands of the enemy missile searcher and outputting IR jamming signals of different IR bands.

Preferably, the jamming code generator generates an IR jamming signal of a different code technique based on the type of the enemy missile searcher.

The present invention can be applied to various types of IR missile-compatible jamming codes, so that an unknown searcher attacked, that is, an IR band missile searcher having various tracking algorithms, (Traps / aircrafts, etc.) can be effectively defended.

Figures 1A and 1B illustrate the tracking principle of an IR missile explorer.
2 is a configuration diagram of an IR jamming code generator IRTG according to an embodiment of the present invention for generating various IR jamming codes in an infrared (IR) wavelength band.
3 is a detailed configuration diagram of a jamming code generator.
4 is a detailed configuration diagram of a jamming signal / target signal controller;
5 to 12 are diagrams illustrating various types of jamming code signals that can effectively deceive various types of IR missiles proposed in the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which like or similar elements are denoted by the same or similar reference numerals, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , &Lt; / RTI > equivalents, and alternatives.

In general, the missile explorer, which tracks and attacks the heat, has various kinds of tracking algorithms. In terms of the Jammer to cope with this, it is impossible to know what kind of tracking algorithm is actually provided.

Accordingly, the present invention provides a variety of IR missiles capable of defending their platforms (traps / aircraft, etc.) equipped with Jammer jammers by ignoring the IR band missile searcher having various tracking algorithms. And provides a corresponding jamming technique. To this end, the present invention provides a variety of IR jamming code signals (hereinafter referred to as " IR jamming signals ") that can defend their own platforms (traps / aircrafts) by cheating different types of IR missiles that are attacked against the entire band of the infrared band, Quot; IR jamming signal " or " jamming signal ").

1A and 1B illustrate a tracking principle of an IR missile searcher. FIG. 1A is a rotation reticle structure of a first-generation IR missile searcher of a spin scan type, FIG. 1B is a view of a target object (Target) and the envelope signal detected by the envelope detector of the searcher.

1A, a reticle located in front of an IR missile searcher (abbreviated as a searcher hereinafter) includes a transparent film 111 and a shielding film 110 in a direction of 0 ° to 180 °, And a translucent film 113 is formed in the remaining 180 ° to 360 ° orientations.

When the reticle is rotated at a constant speed, a certain signal pattern is formed as shown in FIG. 1B. That is, a signal pattern composed of a carrier frequency 121 formed by the transmission / shielding film and a scan frequency 120 corresponding to one rotation cycle of the reticle is formed while the reticle rotates one wheel. At this time, the pulse width 122 is determined according to the number of transmission / shielding films, and the signal level of the signal level based on the transparency rate 50% of the translucent film 11 is 50% The pattern is determined.

1B shows an output signal pattern of the envelope detector in the signal processing unit at the reticle rear end, that is, an envelope signal indicating the target azimuth angle with respect to the reference azimuth detected by the envelope detector. 1B, the envelope detector outputs a reference signal 131 referenced at the center of the carrier frequency 121, and the orientation of the actual target 112 (allied vessel / aircraft) And outputs the target detection signal 130 corresponding to the target detection signal. Therefore, the phase difference between the two signals can be obtained, and the azimuth angle of the target can be calculated by the obtained phase difference.

On the contrary, the Jammer for avoiding / blocking the tracking of the explorer is able to attract / deceive to the direction different from the actual azimuth angle by reversing the electronic weakness of the tracking algorithm of the missile explorer. That is, instead of the actual target detection signal 130, it is possible to radiate an arbitrary jamming code signal of a greater intensity toward the enemy missile searcher. However, since the tracking algorithm is performed in various ways different from FIG. 1 for each missile seeker, it is difficult to simultaneously generate various IR jamming signals in order to deceive each searcher.

2 is a configuration diagram of an IR jamming code generator IRTG for generating various IR jamming signals in an infrared (IR) wavelength band according to an embodiment of the present invention.

2, the IR jamming signal generating apparatus includes a power supply 200 for supplying power, a jamming code generator 201 for generating various kinds of jamming codes, a microcomputer 200 for performing a general control operation of the apparatus, A jamming / target signal (J / S) controller 203 for adjusting the light intensity of the jamming code signal J and the target signal S; At least one continuous wave laser diode 204/205/206 for generating a laser beam of a predetermined wavelength / LWIR / LWIR, and a first lens 212 for emitting light for each band generated in each continuous wave laser diode 204/205/206, A plurality of folding mirrors 208 for adjusting the direction of light of each band condensed through each first lens 207, and a plurality of folding mirrors 208 for adjusting the light reflected through the plurality of folding mirrors 208 A beam combiner 209 for combining beams, and a second lens 210 for emitting light combined in the beam combiner 20.

The microprocessor 202 receives various control commands for generating an IR jamming signal from an external control computer (e.g., PC) through an Ethernet / RS232 signal and controls the operation of each part of the apparatus.

The J / S controller 203 calculates the light intensity of the IR jamming signal J in order to deceive the intensity (light intensity of the target signal S) emitted from the ally trap / As shown in FIG. The light intensity of the IR jamming signal J is adjusted to be equal to or greater than the intensity of the target signal S. [

The continuous wave laser diode 204/205/206 is configured to detect a near infrared ray band (SWIR) according to a control command output from the microprocessor 202 according to the type of enemy missile, more specifically, IR jamming signals that can respond to thermal tracking IR missiles of 0.75μm to 2.5μm, middle infrared band (MWIR: 3.0μm to 5.0μm), and far infrared band (LWIR: 8.0μm to 15μm) do.

Although the present invention has disclosed three continuous wave laser diodes 204/205/206, it has been shown that the near infrared band (SWIR: 0.75 μm to 2.5 μm), the medium infrared band (MWIR: 3.0 μm to 5.0 μm) and the far infrared band : 8.0μm to 15μm) thermal tracking IR missiles, the number of which can vary.

The first and second lenses may be convex lenses.

3 is a detailed configuration diagram of the jamming code generator 201. FIG.

3, the jamming code generator 201 includes a reference clock signal generator 310 for generating a reference clock signal in accordance with the number of slots and the reference frequency of the reticle provided in the microprocessor 202, A carrier / scan frequency generator 330 for generating a carrier frequency and a scan frequency under the control of the frequency control module 320; A modulation control module 340 for controlling the amplitude modulation / frequency modulation / variable modulation / duty ratio according to the control command, and a control module 340 for controlling the modulation / And a frequency modulator 350 for varying the amplitude (AM) modulation / frequency (FM) / variable modulation / duty ratio of the carrier frequency and the scan frequency to output various jamming codes in the form of an analog signal.

The carrier / scan frequency generator 330 forms a signal pattern composed of a carrier frequency formed by the transmission / shielding film and a scan frequency corresponding to one rotation cycle of the reticle while the reticle rotates one wheel according to the reference frequency. At this time, the pulse width of the signal pattern is determined according to the number of reticle slots, and a signal pattern having a reference level (50%) and a duty (duty) of 50%, which is the signal size based on the transparency rate of 50% of the translucent film, is determined.

The modulation control module 340 generates a control signal for outputting one of the IR jamming signals of various coding schemes shown in FIGS. 5 to 12 according to a control command output from the microprocessor 202. Under the control of the modulation control module 340, the frequency modulator modulates the amplitude (AM) modulation / frequency (FM) / variable modulation / Duty rate is varied to output a specific jamming code in the form of an analog signal.

4 is a detailed configuration diagram of the jamming / target signal controller 203. FIG.

4, the jamming signal / target signal controller 203 includes a jamming signal / target signal controller 203 for generating a first current feedback signal for stably controlling the intensity of the target signal S 440, which is light generated in the target Loop and a second current feedback loop for stably controlling the light intensity of the IR jamming signal (J) 441 to deceive the target.

The first and second current feedback loops are connected to the microcomputer 202 in response to the current control signal S (J) (target current value) A laser diode 420 and 421 for generating lights 440 and 450 respectively and current detection circuits 430 and 431 for detecting current intensities of the laser diodes 420 and 421; 430 and 431 and a target current value based on the current control signal S and J to calculate an error and then control the laser diodes 420 and 421 with an error value, And Proportional Integration Derivative (PID) controllers 410 and 411 for controlling the rise / fall times of the jamming code signal pulses in accordance with the jamming code signal pulses to generate a desired jamming signal J by reducing the residual error of the feedback loop.

Since the laser diodes 420 and 421 can be easily damaged by a minute current size, precise current intensity control is required. Also, in order to shorten the rise / fall time of various jamming signal pulses as short as possible, the PID controllers 410 and 411 ) Is used.

In particular, FIG. 4 is for enhancing the maximum jamming effect by adjusting the ratio of the light intensity of the IR jamming signal to the detected IR target signal S, and the jamming / target signal controller 203 according to the present invention performs simulation A jamming / target signal of about 20 dB was realized based on the minimum target signal intensity (about 1 mmW) compared with the maximum jamming signal intensity (about 100 mmW).

The IR target signal S and the IR jamming signals J 440 and 441 are signals that the operator can refer to during the simulation and are not ultimately output IR jamming signals. Thus, the current detected by the laser diode 421 is input to at least one of the continuous wave laser diodes 204/205/206 to form an IR jamming signal.

5 to 12 show various types of jamming code signals that can effectively deceive various kinds of IR missiles proposed in the present invention. The various kinds of jamming code signals are generated in the jamming code generator 201 on the basis of control commands transmitted from the external computer to the microprocessor 202.

5 is a carrier code technique that disrupts the angle tracking of a missile searcher by continuously generating a constant carrier frequency. FIG. 6 is a single / composite code technique for generating various combinations of various carrier frequencies in a single scanning (scanning) cycle. FIG. 7 is a swept FM code scheme for sweeping the scan frequency within a scan cycle at regular intervals because the carrier frequency of the missile searcher is unknown.

FIG. 8 is a swept AM / FM code scheme that changes the carrier frequency and scan frequency of the missile searcher at the same time. This technique is especially applicable to the third generation JetScan searcher. The effect can be enhanced by changing the scan period (the jet scan period) and the carrier frequency (the petal frequency) very quickly within a certain range.

FIG. 9 is a collective AM code scheme for collectively generating carrier frequencies at regular intervals in a scanning frequency cycle. 10 is a swept AM / duty code scheme that varies the period (T) of the scanning frequency while varying the ratio (duty ratio) of the period t of the carrier frequency. FIG. 11 is a discrete FM code technique that continuously generates several carrier frequencies within a cycle of one scanning frequency. FIG. 12 is an irregular AM code scheme that continuously generates irregular pulses.

As described above, according to the present invention, a jammer can be mounted by ignoring an IR band missile searcher having unknown searchers, that is, various types of tracking algorithms, by providing jamming codes corresponding to various kinds of IR missiles. (Traps / airplanes, etc.) of the user.

The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. In addition, the computer may include a control unit. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

200: power supply 201: jamming code generator
202: Microprocessor 203: J / S controller
204 to 206: Continuous wave laser diode
207, 210: lens 208: folding mirror
209: Beam combiner

Claims

A jamming code generator for generating an analog multiple jamming code for deceiving an enemy missile explorer attacking an entire band of an infrared band (IR);
A jamming signal / target signal (J / S) controller for adjusting the strength of the generated analog jamming code according to the intensity of a target signal that can be searched by an enemy missile searcher; And
And generates laser light corresponding to the intensity of the IR jamming code signal output from the jamming signal / target signal (J / S) controller, And a plurality of laser diodes for continuously outputting a jamming signal,
Wherein the different IR bands include a near-infrared band, a mid-infrared band, and a far-infrared band.

The apparatus of claim 1, further comprising: a microprocessor for performing an overall control operation for generating the IR jamming signal through communication with an external computer;
At least one plurality of first lenses for respectively condensing IR jamming signals generated in the plurality of laser diodes;
A plurality of folding mirrors for adjusting the direction of light condensed by the plurality of first lenses;
A beam combiner for combining lights of the different wavelength bands reflected through the plurality of folding mirrors; And
And a second lens for radiating the synthesized light from the beam combiner to an enemy missile searcher.

The method of claim 1, wherein the jamming signal / target signal (J / S)
And generates a jamming signal / target signal value of 20 dB or more based on the minimum target signal intensity with respect to the maximum jamming signal strength.

The method according to claim 1, wherein the jamming code generator
A reference clock signal generator for generating a reference clock signal according to the number of slots (film) of a reticle provided in the microprocessor and a reference frequency;
A frequency control module for controlling at least one of a carrier frequency and a scan frequency according to a control command of the microprocessor;
A carrier and scan frequency generator for generating a carrier frequency and a scan frequency under the control of the frequency control module;
A modulation control module for controlling at least one of an amplitude modulation, a frequency modulation and a duty ratio according to a control command of the microprocessor; And
A frequency modulator for varying at least one of amplitude, frequency, modulation rate and duty ratio of the carrier frequency and the scan frequency outputted from the carrier and scan frequency generator under the control of the modulation control module and outputting various jamming codes in the form of analog signals; And a controller for controlling the jamming of the electronic device.

The apparatus of claim 1, wherein the J / S controller
A first current feedback loop for stably controlling the light intensity of the jamming code signal based on the first current control signal and a second current feedback loop for stably controlling the light intensity of the target signal based on the first current control signal, And a controller for controlling the jamming of the electronic device.

6. The method of claim 5, wherein the first and second current feedback loops
A laser diode for generating light of a target signal and a jamming code signal, respectively;
A current detection circuit for detecting a current intensity of the laser diode; And
And a Proportional Integration Derivative (PID) controller for calculating an error by comparing the current value detected by the current detection circuit with a desired target value and controlling the laser diode with an error value,
Wherein the PID controller adjusts at least one of a rise time and a fall time of the jamming code signal pulse according to the calculated error value.

The method according to claim 1, wherein the jamming code generator
And generating a jamming code of a carrier code technique that generates a constant carrier frequency continuously to disrupt angle tracking of the missile searcher.

The method according to claim 1, wherein the jamming code generator
Wherein the jamming code generating unit generates jamming codes of a single and composite code technique for generating various combinations of various kinds of carrier frequencies in a single scanning cycle.

The method according to claim 1, wherein the jamming code generator
And generating a jamming code of a swept FM code scheme that sweeps the scanning frequency within a period of a predetermined period.

The method according to claim 1, wherein the jamming code generator
Wherein the jamming code of the swept AM and FM code technique for rapidly varying the carrier frequency and the scanning frequency at regular intervals is generated.

The method according to claim 1, wherein the jamming code generator
And generates a jamming code of a collective AM code technique for collectively generating a carrier frequency of a predetermined interval in a scanning frequency cycle.

The method according to claim 1, wherein the jamming code generator
And generating a jamming code of a swept AM and a duty code technique for varying the cycle of the scanning frequency and varying the duty ratio of the cycle of the carrier frequency.

The method according to claim 1, wherein the jamming code generator
And generates a jamming code of a discrete FM code technique that continuously generates several carrier frequencies within a cycle of one scanning frequency.

The method according to claim 1, wherein the jamming code generator
And generates a jamming code of an irregular AM code scheme that continuously generates irregular pulses.