RU2746212C1 - Device for protection against radio-controlled explosive devices - Google Patents

Abstract

FIELD: explosive devices.

SUBSTANCE: invention relates to a means of dealing with mines, improvised explosive devices and other explosive objects, having radio-controlled fuses (RF), and is intended to block the reception of RF control commands. The device for protection against radio-controlled explosive devices contains a serially connected receiving antenna, a radio signal processing unit, a power amplifier, a transmitting antenna and a power supply unit connected to a power amplifier and a radio signal processing unit. A series-connected electro-optical converter, an optoelectronic radio signal processing unit, an optoelectronic converter, as well as a control and monitoring unit connected to all units of the radio signal processing unit are introduced into the radio signal processing unit. An optical splitter, a fiber-optic delay line and an optical amplifier are sequentially introduced into the unit for optoelectronic processing of radio signals. The fiber optic delay line is connected to the optical splitter and the input of the optical amplifier, and the output of the optical amplifier is connected to the optical splitter.

EFFECT: invention is aimed at increasing efficiency of jamming radio receivers in an ultra-wide range of previously unknown radio frequencies without increasing power consumption, dimensions and weight of the device.

1 cl, 2 dwg

Description

FIELD OF TECHNOLOGY

The invention relates to a means of dealing with mines, improvised explosive devices and other explosive objects having radio-controlled fuses (RW), is intended to block (prevent) the reception of RV control commands by interfering with the RV receiving devices, as well as to prevent the transmission of any information using radio communication at an unknown carrier frequency, modulation format and coding in an ultra-wide range of previously unknown radio frequencies.

LEVEL OF TECHNOLOGY

Known broadband interference transmitters that can be used to interfere (block) receiving devices by emitting broadband interference, the spectrum of which falls within the operating frequency range of the receiving device, and containing a block for forming a broadband signal with a continuous spectrum of the "white noise" type, a power amplifier, power supply unit and antenna [Ivliev S., Maystrenko N. et al. Search and disposal of explosive devices. M. Fund for Economic Security, 1996, pp. 60-64].

The disadvantage of such transmitters is the low efficiency of jamming radio receivers due to the low spectral power density of broadband interference.

Known interference transmitter containing a block for generating a broadband signal with a continuous spectrum of the "white noise" type, a block for narrowing the emission band, a power amplifier, a power supply and an antenna [P.A. Allen & Company. Internal Security Equipment Catalog, page 42].

The disadvantage of such a transmitter is the low efficiency of jamming radio receivers, caused either by the low spectral power density of the broadband interference, or by the need for a priori information about the radio frequency range of the blocked receiver, which is necessary for the operation of the radiation band narrowing unit, which in practice is only possible in rare cases.

Known device for blocking RV [Battalov A.M., Gordon OI, Konoplev V.A., Odnopalov I.A. RF patent No. 2131645 Device for blocking radio fuses, publ. 06/10/1999], containing a set of frequency shapers, a switch, a pseudo-random sequence generator, a broadband power amplifier, a controlled matching device, a broadband antenna system and a performance regulator, the algorithm of which allows monitoring the radio environment and quickly adapting to changes in the radio frequency environment.

The disadvantage of such a device is the relatively high probability of missing the moment of transmission of the control command due to the time spent monitoring the radio situation and developing control actions to adapt to the changing radio environment.

You know a device for protection against radio-controlled explosive devices [Semenyuk T.A. RF patent No. 2716390 Device for protection against radio-controlled explosive devices, publ. 03/11/2020] (prototype), containing a receiving antenna, a receiver, an amplifier, a first bandpass filter, a first signal delay shaping device, a second signal delay shaping device, a first signal adder, a second signal adder, a third signal adder, a periodic nonlinear voltage generator, voltage controlled oscillator, bandpass filter, power amplifier and transmitting antenna. The delay duration of the first signal delay generator is 0.25-0.50 of the duration of the frequency period of the upper limit of the protected range, and the delay duration of the second signal delay generator is 1.00-2.00 of the duration of the frequency period of the upper limit of the protected range. The prototype device, due to the signal delay generation devices included in its composition, ensures the destruction of the information part and individual fragments of the signal structure containing the control command, which provides protection against radio-controlled explosive devices.

The disadvantage of the prototype device is the limited frequency range at which interference to the RT receiving devices is created effectively, due to the use of delays with durations in the range from 0.25 to 2.00 of the duration of the frequency period of the upper limit of the protected range.

SUMMARY OF THE INVENTION

The objective of the present invention is to provide a high probability of blocking the radioactive waste and, as a consequence, reliable protection against mines, improvised explosive devices and other explosive objects with radioactive substances.

The technical result of the proposed device for blocking radioactive substances is to increase the efficiency of jamming radio receivers in an ultra-wide range of previously unknown radio frequencies without increasing power consumption, dimensions and weight of the device.

The technical result is achieved due to the fact that the device for protection against radio-controlled explosive devices contains at least one receiving antenna, a radio signal processing unit, at least one power amplifier, at least one transmitting antenna and a power unit, while the radio signal processing unit an electro-optical converter, an optoelectronic processing unit for radio signals, an optoelectronic converter were introduced. In this case, at least one fiber-optic delay line can be introduced into the unit for optoelectronic processing of radio signals. In this case, at least one optical splitter connected to a fiber-optic delay line can be introduced into the unit for optoelectronic processing of radio signals. In this case, an optical amplifier can be introduced into the unit for optoelectronic processing of radio signals.

This technical solution provides:

- expansion of the operating frequency range of the device from tens of megahertz to tens of gigahertz due to optoelectronic processing of radio signals [Urik V.D., McKinney D.D., Williams K.D. Basics of microwave photonics. - M .: Technosphere, 2016.376 p., ISBN 978-5-94836-445-2],

- change (violation) of the information part of the signal when a fiber-optic delay line is introduced into the optoelectronic processing unit due to the addition of the original signal with its time-shifted copy, as in the prototype, but with a wide range of delay durations without increasing the mass and dimensions due to weight and dimensions characteristics of optical fiber [Urik VD, McKinney DD, Williams KD. Basics of microwave photonics. - M .: Technosphere, 2016.376 p., ISBN 978-5-94836-445-2],

- increased efficiency of jamming in comparison with the prototype when an optical splitter is introduced into the optoelectronic processing unit, which provides multiple signal transmission through the fiber-optic delay line and, as a consequence, the formation of several delayed copies,

- an additional increase in the efficiency of jamming when an optical amplifier is introduced into the optoelectronic processing unit, which compensates for losses during optoelectronic processing of radio signals and when signals pass through an optical splitter and fiber-optic delay lines.

The above and other objects, features, advantages, as well as the technical significance of the present invention will be better understood from the following detailed description of the invention with reference to the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1 shows a block diagram of the proposed device. The device contains one or more receiving antenna 1, a radio signal processing unit 2, one or more power amplifier 3, one or more transmitting antenna 4, a power unit 5. The radio signal processing unit contains an input amplifier 6, an electro-optical converter 7, an optoelectronic radio signal processing unit 8, optoelectronic converter 9, output amplifier 10, control and monitoring unit 11.

Figure 2 shows a block diagram of a unit for optoelectronic processing of radio signals 8 with an optical splitter 8.1 inserted into it, a fiber-optic delay line 8.2, an optical amplifier 8.3.

CARRYING OUT THE INVENTION

The proposed device operates as follows. The radio signal is received by antenna 1, processed by the radio signal processing unit 2 by amplification by the input amplifier 6, modulation of the intensity of optical radiation with a radio signal in the electro-optical converter 7, processing the modulated optical radiation in the optoelectronic processing unit of radio signals 8, detecting optical radiation with the formation of a radio signal proportional to the intensity of optical radiation, in optoelectronic converter 9, amplification by amplifier 10, after which the output signal of the radio signal processing unit 2 is amplified by the power amplifier 3 and emitted by the transmitting (emitting) antenna 4. Setting the operating mode and monitoring the operability is carried out by the control and monitoring unit 11. Power is supplied by the power supply unit 5.

The modulated optical radiation enters the input A of the optical splitter 8.1, is summed with the signal arriving at the input B, after which it is partially diverted to its output D, passes through the fiber-optic delay line 8.2, amplified by the optical amplifier 8.3 and enters the input B of the optical splitter. The output signal of the optoelectronic processing unit is formed at the output C of the optical splitter and is a partial sum of the signals arriving at its inputs A and B. Due to the repeated passage of the signal through the fiber-optic delay line and compensation of losses by the optical amplifier, the output signal of the optoelectronic processing unit is the sum multiple delayed copies of the input signal.

Thus, the use of an electro-optical converter, an optoelectronic processing unit for radio signals and an optoelectronic converter in the radio signal processing unit of the proposed device for blocking radioactive substances makes it possible to interfere with radio frequency transmitters in an ultra-wide range of previously unknown radio frequencies without increasing power consumption, dimensions and weight of the device. The introduction of a fiber-optic delay line, an optical splitter and an optical amplifier into the unit for optoelectronic processing of radio signals makes it possible to increase the efficiency of jamming radio receivers by changing (disrupting) the information part of the signal due to the formation of many delayed copies superimposed on each other.

Claims (2)

1. A device for protection against radio-controlled explosive devices, containing a serially connected receiving antenna, a radio signal processing unit, a power amplifier, a transmitting antenna and a power supply unit connected to a power amplifier and a radio signal processing unit, characterized in that series-connected electro-optical a converter, a unit for optoelectronic processing of radio signals, an optoelectronic converter, as well as a control and monitoring unit connected to all units of the unit for processing radio signals. 2. The device according to claim 1, characterized in that an optical splitter, a fiber-optic delay line and an optical amplifier are sequentially introduced into the optical-electronic processing unit of radio signals, while the fiber-optic delay line is connected to the optical splitter and the input of the optical amplifier, and the output of the optical amplifier is connected to an optical splitter.

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