RU2813382C1 - Device for preventing transmission of control information of unauthorized devices - Google Patents

Abstract

FIELD: radio engineering and communication.

SUBSTANCE: invention relates to means of fighting mines and other explosive objects having radio fuses and is intended for protection against radio-controlled explosive devices by blocking unauthorized transmission of information on controlling radio fuses over a radio channel. Device comprises series-connected non-linear variable voltage generator, voltage-controlled generator, first and second amplifiers, first and second valves, first and second antennae, first and second controlled switches, a device for controlling said switches, third and fourth amplifiers, third and fourth antennae and a signal frequency multiplier. Voltage-controlled generator generates a harmonic signal, the frequency of which continuously varies over a period of time according to the law determined by the shape of the output signal of the nonlinear variable voltage generator.

EFFECT: higher probability of guaranteed jamming with fragmentary increase in energy density of interference signal in protected range.

1 cl, 1 dwg

Description

The invention relates to means of combating mines and other explosive objects that have radio fuses and is intended for protection against radio-controlled explosive devices by blocking the unauthorized transmission of control information for radio fuses over a radio channel, and can also be used to protect against unauthorized transmission of any information over a radio channel in the range of previously unknown radio frequencies.

A device for blocking unauthorized devices [1] is known, containing a nonlinearly varying voltage driver, a voltage-controlled generator, a bandpass filter, an inverter, a comparator, a pulse counter, a two-position switch and a control device, a power amplifier and an antenna.

This device allows you to implement its function in a given range by setting up barrage interference, as a result of which it is significantly energy-consuming. In this and similar devices, the power of radiated interference at each specific suppressed frequency is small, since the integral power of the transmitter is “blurred out” over the entire wide spectrum of frequencies, as a result of which only low-power unauthorized transmitters of information can be suppressed.

A known means for blocking radio-controlled fuses [2], containing three nonlinearly varying voltage formers, three voltage-controlled generators, two signal inverters, a two-position switch and a control unit for this two-position switch, a bandpass filter, a power amplifier and a radiating antenna.

This known device can emit high power in each frequency sub-band, sufficient to protect against radio-controlled explosive devices. When the phase of the interfering signal switches, the number of frequencies in the spectrum increases. This factor allows you to increase the number of affected frequencies.

A device for blocking radio fuses [3] (prototype) is known, containing a power amplifier and antenna, a nonlinearly varying voltage driver, two voltage-controlled generators, an inverter, a bandpass filter, a two-position switch, and a control device.

The operating algorithm of this device makes it possible to effectively provide radio suppression of unauthorized devices in accordance with the radio frequency environment. However, the device is too energy-consuming to effectively solve problems.

The objective of the present invention is to increase the reliability of protection against unauthorized transmission of control information for radio fuses over a radio channel in a wide range of protected radio frequencies without significantly increasing the integral output power of the device, its energy consumption, dimensions and weight.

The technical result of the proposed means for blocking radio-controlled fuses is to increase the probability of guaranteed radio suppression with a fragmentary increase in the energy density of the interference signal in the protected range, which is achieved by using additional pumping of electromagnetic energy into the protected range.

The technical result is achieved due to the fact that in a device for counteracting the transmission of control information of unauthorized devices, containing a noise generator consisting of a series-connected linear-varying voltage generator and a voltage-controlled generator, first and second amplifiers, first and second valves, first and second antennas, that it additionally includes

first and second controlled switches, a control device for these switches, third and fourth amplifiers, third and fourth valves, third and fourth antennas, and a signal frequency multiplier, wherein the output of the voltage-controlled generator is connected to the input of the first amplifier, to the input of the frequency multiplier and the input of the first key,

the output of the signal frequency multiplier is connected to the input of the second switch and to the input of the fourth amplifier, the output of the first amplifier is connected to the input of the first valve, the output of which is loaded onto the first antenna, the output of the first controlled switch is connected to the input of the second amplifier, the output of which is connected to the input of the second valve, the output which is loaded to the second antenna, the output of the second controlled key is connected to the input of the third amplifier, the output of which is connected to the input of the third valve, the output of which is loaded to the third antenna, the output of the fourth amplifier is connected to the input of the fourth valve, the output of which is loaded to the fourth antenna, and the keys are connected to the control device, which is closed in antiphase.

New features that ensure the achievement of the technical result are the introduced first and second controlled keys, a control device for these keys, third and fourth amplifiers, third and fourth valves, third and fourth antennas, and a signal frequency multiplier, while the output of the voltage-controlled generator is connected to the input of the first amplifier, to the input of the frequency multiplier and the input of the first switch, the output of the signal frequency multiplier is connected to the input of the second switch and to the input of the fourth amplifier, the output of the first amplifier is connected to the input of the first valve, the output of which is loaded onto the first antenna, the output of the first controlled switch is connected to the input of the second amplifier, the output of which is connected to the input of the second valve, the output of which is loaded to the second antenna, the output of the second controlled switch is connected to the input of the third amplifier, the output of which is connected to the input of the third valve, the output of which is loaded to the third antenna, the output of the fourth amplifier is connected to the input the fourth valve, the output of which is loaded onto the fourth antenna,

and the keys are connected to a control device, which is closed in antiphase.

This technical solution, combined with new features, provides:

universality of suppression of signals from devices with most types of modulation, increasing the probability of guaranteed radio suppression with a comparable energy density of the interfering signal.

The device uses a well-known frequency sweep method, which allows it to emit a given power at each frequency or similar frequencies sequentially over time. In this case, at a certain frequency f(t), a signal of the required power, sufficient for reliable protection, is generated and emitted, and this frequency itself changes over the entire range of protected frequencies over a period of time, depending on the number of frequency drivers and the frequency sweep time T by one frequency driver, “running through” all values from lower to upper.

This technical solution is aimed at increasing the probability of guaranteed radio suppression in the protected range due to additional portioned discrete supply of electromagnetic energy into space (addition of electromagnetic waves). A positive effect is achieved by increasing the power of the interference signal in discrete portions alternately in two adjacent protected frequency ranges.

In fig. 1 shows a block diagram of the proposed device.

The device contains a driver 1 of a periodic, generally nonlinear (or linearly, as a special case) varying voltage, a voltage-controlled generator 2, a signal frequency multiplier 3, the first 4 and second 5 controlled switches, a device 6 for controlling these keys, the first 7, the second 8 , third 9 and fourth 10 amplifiers, first 11, second 12, third 13 and fourth 14 valves, first 15, second 16, third 17 and fourth 18 antennas.

The operation of the claimed device for counteracting the transmission of control information of unauthorized devices is carried out as follows.

The output signal from the output of the nonlinear periodically varying voltage driver 1 is supplied to the input of the voltage-controlled generator 2, which generates a harmonic signal, the frequency of which f changes continuously over a period of time T according to the law determined by the shape of the output signal of the nonlinear voltage driver 1, from f min = f1 to f max = f2.

The output signal of the voltage-controlled harmonic oscillation generator 2 is amplified by the first 7 amplifier, passes through valve 11, the output of which is loaded onto the first antenna 15. In this case, the air of the first frequency range from f1 to f2 is exposed to sliding harmonic interference.

At the same time, the output signal of the voltage-controlled harmonic oscillation generator 2 is fed to the input of the signal frequency multiplier 3, which increases the signal frequency by 2 times. This creates a second adjacent frequency range. The frequency-doubled signal from the output of multiplier 3 is fed to amplifier 10, amplified by it, and passes through valve 14 tuned to the range f3 to f4, the output of which is loaded onto the fourth antenna 18.

In this case, both frequency ranges are filled with interference signals. The boundaries of frequency range 1 are selected from the conditions 2×f1=f2=f3,

and the boundaries of frequency range 2 are 2×f3=2×f2=4×f1=f4,

where f1-f2 are the beginning and end of the boundaries of the first range, respectively,

f3-f4 - the beginning and end of the boundaries of the second range, respectively.

The output signal of the voltage-controlled harmonic oscillation generator 2, along the second parallel branch, is supplied to the input of the first controlled switch 4, the output of the first controlled switch is connected to the input of the second amplifier 8, amplified by the second amplifier 8, passes through valve 12, the output of which is loaded onto the second antenna 16.

This inclusion allows additional portions, proportional to the closing time of key 4, to inject the electromagnetic energy of the interference signal into the first frequency range from antennas 15 and 16. Common-mode interference signals are added up, which increases the power of the interference effect.

The output signal of the multiplier 3 is supplied to the input of the second controlled switch 5, the output signal of the second controlled switch 5 is supplied to the input of the third amplifier 9, amplified by the third amplifier 9, passes through valve 13, configured to the range from f3 to f4, the output of valve 13 is loaded onto the second antenna 17.

Control signals to keys 4 and 5 come from control device 6 in antiphase, which allows you to alternately add electromagnetic energy in portions to frequency ranges. The half-cycle of switching the keys is at least 2 periods of the lowest frequency of the interference harmonic of the boundary of the smallest range.

The ratio of the durations of signal fragments from the output of generator 2 and from the output of multiplier 3 is proportional to the duty cycle of the signal from the output of device 6 for controlling the opening of keys 4 and 5.

The switching frequency of the switches increases as the harmonic moves across the range, ensuring a uniform density of filling the protected range with an interference signal with close values of the protected frequencies.

This technical solution makes it possible to effectively influence the receiving parts of radio devices, causing them to overload and subsequent long-term recovery. The algorithm for generating a multi-amplitude interference signal incorporated into the operation of the device makes it possible to increase the apparent energy density of the impact and, as a result, increase the radio suppression distance due to overloading the input circuits.

Thus, the proposed tool, due to a new set of features and an algorithm for their interaction, ensures an increase in the efficiency of radio suppression compared to analogues, and simplifies the design by reducing the number of nodes. Energy saving in an autonomous device is carried out by alternately injecting electromagnetic energy into adjacent protected ranges, which reduces energy consumption.

Thus, a change in the information part of the signal/signals (destruction or deformation) at close frequencies, together with an amplitude excess, causing an overload of the input circuits and their subsequent long-term recovery, makes it possible to increase the likelihood of radio suppression, and due to the algorithm for the interaction of nodes, it simplifies the device and reduces its weight and size parameters .

Information sources:

1. Semenyuk T.A. Device for blocking unauthorized devices // Patent RU No. 2 720 698. Publ.: 05/12/2020 Bulletin. No. 14 Semenyuk T.A.), F41H 11/12 (2011.01), H04K 3/00 (2006.01), N04B 7/00 (2006.01).

2. Semenyuk T.A. Means for blocking radio-controlled fuses // Patent 2732079, Publ.: 09.11.2020 Bulletin. No. 26 H04K 3/00 (2006.01) F41H 11/12 (2011.01) H04K 3/00.

3. Semenyuk T.A. Means for blocking radio fuses // Patent No. 2716604, Publ.: 03.13.2020 Bulletin. No. 8 H04K 3/00 (2006.01) F41H 11/12 (2011.01) Н04В 7/00 (2006.01) (52).

Claims (6)

A device for counteracting the transfer of control information for unauthorized devices, containing series-connected nonlinear variable voltage driver, voltage-controlled generator, first and second amplifiers, first and second valves, first and second antennas, characterized in that it contains the first and second controlled keys, a control device for these keys, a third and fourth amplifiers, a third and fourth valves, a third and fourth antennas and a signal frequency multiplier, while a voltage-controlled generator generates a harmonic signal whose frequency changes continuously over a period of time according to the law determined by the shape of the output signal of the nonlinear varying voltage driver, the output of the voltage-controlled generator is connected to the input of the first amplifier, to the input of the signal frequency multiplier and the input of the first controlled switch, the output of the signal frequency multiplier is connected to the input of the second controlled switch and to the input of the fourth amplifier, the output of the first amplifier is connected to the input of the first valve, the output of which loaded on the first antenna, the output of the first controlled switch is connected to the input of the second amplifier, the output of which is connected to the input of the second valve, the output of which is loaded to the second antenna, the output of the second controlled key is connected to the input of the third amplifier, the output of which is connected to the input of the third valve, the output of which is loaded to the third antenna, the output of the fourth amplifier is connected to the input of the fourth valve, the output of which is loaded onto the fourth antenna, and the controlled keys are connected to the control device, which is closed in antiphase.

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