RU2717320C1 - Device for counteraction to radio-controlled explosive devices - Google Patents

Abstract

FIELD: radio equipment.

SUBSTANCE: invention relates to means of controlling mines and other explosive objects having radio fuses and is intended for protection against radio-controlled explosive devices. Device comprises receiving antenna 1, receiver 2, first signal delay generating device 3, second signal delay generating device 4, first two-position switch 5, controlled by device 6 of control of two-position switch 5, first signal summator 7, third signal delay generating device 8, fourth signal delay generating device 9, second two-position switch 10 controlled by two-position switch 10 control device 11, second signal adder 12, a periodic nonlinearly varying voltage generator 13, voltage-controlled generator 14, a third signal adder 15, band-pass filter 16, power amplifier 17 and transmitting antenna 18.

EFFECT: technical result consists in increase in the probability of guaranteed radio suppression at the same energy density of the interference signal in the protected range.

1 cl, 1 dwg

Description

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

Known protection devices that can be used to prevent the operation of radio fuses, for example [1], containing a serially connected frequency driver, a broadband power amplifier and a broadband antenna system that create a blocking noise in a wide frequency band in the form of amplified "white" noise. In this and similar devices, the power of the emitted interference at each specific suppressed frequency is small, since the integrated power of the transmitter is “washed out” over the entire wide spectrum of frequencies, as a result of which only very low-power unauthorized information transmitters can be suppressed.

A device for blocking radio fuses, containing several (n) modules of the same type, each of which includes a serially connected frequency driver, amplifier and antenna, while all modules simultaneously operate in non-overlapping subbands of the protected frequency range [2]. This known device allows you to radiate high power in each frequency subband, sufficient to protect against radio-controlled explosive devices. One of the disadvantages of such a device for blocking radio fuses is an increased n-fold integrated radiation power, where n is the number of modules used. An increase in the integral power of the interference transmitter is undesirable, because of a significant increase in power consumption, dimensions and mass.

A device for blocking radio fuses [3] (prototype), comprising n frequency drivers, a switch, a pseudo-random pulse sequence generator, a matching device connected between a broadband power amplifier and a broadband antenna system, and a performance regulator are known.

The algorithm of this device allows you to quickly adapt it to a change in the radio frequency environment.

However, the device cannot provide guaranteed protection in a given frequency range, because it takes time to monitor the radio environment and is in constant search, decision making mode and blocking the values of the changing frequencies of the functioning transmitters.

The objective of the present invention is to increase the reliability of protection against unauthorized transmission of control information of radio fuses via a radio channel in a given range of protected radio frequencies without increasing the integrated output power of the device, its power consumption, dimensions and mass.

The technical result of the proposed device for protection against radio-controlled explosive devices is to increase the likelihood of guaranteed radio suppression with the same energy density of the interfering signal in the protected range, simplifying the device and increasing its reliability.

The technical result is achieved due to the fact that the first, second, third and fourth devices are introduced into the device for counteracting radio-controlled explosive devices containing a receiving antenna, a receiver, a nonlinearly varying voltage generator and a voltage controlled generator, a bandpass filter, a power amplifier and a transmitting antenna signal delay generation, first, second and third signal adders, first and second on / off switches, first and second on / off control devices E switches,

the output of the receiver is connected to the inputs of the first and second signal delay generating devices and to the first signal input of the first signal adder, the outputs of the first and second signal delay forming devices are connected to the inputs of the first on-off switch, the output of which is connected to the second signal input of the first signal adder, the output of the first adder signal is connected to the inputs of the third and fourth signal delay generating devices and to the first signal input of the second adder sig the signals, the outputs of the third and fourth signal delay generating devices are connected to the inputs of the second on-off switch, the output of which is connected to the second signal input of the second signal adder, the output of the second signal adder and the voltage-controlled oscillator output are connected to the inputs of the third adder, the output of the third adder is connected to a bandpass filter the output of which is connected to the input of the power amplifier, the output of which is connected to the input of the transmitting antenna, while

the first and second on / off switches are controlled by the first and second on / off switches control devices, respectively, the delay times of the first, second, third and fourth signal delay generating devices are not equal to each other, the switching frequency of the first on / off switch is higher than the switching frequency of the second on / off switch, and the frequency range of the generator , controlled by voltage, is in the range of frequencies protected by the device.

New features ensuring the achievement of the technical result are the additionally introduced first, second, third and fourth signal delay generating devices, first, second and third signal adders, first and second on-off switches, first and second on-off switches control devices, the output of the receiver is connected to the inputs the first and second signal delay generating devices and to the first signal input of the first signal adder, the outputs of the first and second device signal delay configurations are connected to the inputs of the first on-off switch, the output of which is connected to the second signal input of the first signal adder, the output of the first signal adder is connected to the inputs of the third and fourth signal delay generation devices and to the first signal input of the second signal adder, outputs of the third and fourth formation devices signal delays are connected to the inputs of the second on-off switch, the output of which is connected to the second signal the second adder of signals, the output of the second adder of signals and the output of the voltage-controlled generator is connected to the inputs of the third adder, the output of the third adder is connected to a bandpass filter, the output of which is connected to the input of the power amplifier, the output of which is connected to the input of the transmitting antenna, while the first and second on-off switches are controlled by the first and second control devices on-off switches, respectively.

Such a technical solution, together with new features and new connections between its elements and blocks, provides:

increasing reliability, reducing the number of functional units (lack of a full monitoring system, radio environment analysis system),

universality of suppression of all types of modulation, as the structure of the suppression signal corresponds to the structure of the suppressed signal,

reducing the dimensions, mass and power consumption of the device to achieve the specified reliability of protection, without increasing the integrated power,

increased probability of guaranteed radio suppression at the same energy density of the interfering signal,

simplification of the circuitry, and, consequently, the cost of the device.

This technical solution is aimed at increasing the probability of guaranteed radio suppression in the protected band due to the destruction of the information part of the signal / signals while maintaining the structure of the suppressed signals, and the destruction of the information part of the signal / signals when individual fragments of the structure of these signals / signals are destroyed, with the same energy density as prototype in the protected range.

Thus, the destruction of the information part of the signal / signals, the destruction of individual fragments of the signal / signal structure together with the amplitude excess allows increasing the probability of radio suppression

The use of the method of fragmented substitution, destructuring and deformation of signals increases the likelihood of suppressing functioning transmitters, which was confirmed experimentally.

In FIG. 1 shows a structural diagram of the inventive device.

The device comprises a receiving antenna 1, a receiver 2, a first signal delay generating device 3, a second signal delay generating device 4, a first on-off switch 5 controlled by a on-off switch controlling device 6, a first signal adder 7, a third signal delay generating device 8, and a fourth device 9 signal delay generation, the second on-off switch 10, controlled by the device 11 controls the on-off switch 10, the second adder 12 signals, forms rovatel 13 nonlinearly varying periodic voltage generator 14, a voltage controlled oscillator (VCO) 15, a third adder signal, a bandpass filter 16, power amplifier 17 and transmitting antenna 18.

The output of the receiver 2 is connected to the inputs of the first 3 and second 4 signal delay generating devices and to the first signal input of the first signal adder 7, the outputs of the first 3 and second 4 signal delay generating devices are connected to the inputs of the first on-off switch 5, the output of which is connected to the second signal input the first adder 7 signals, the output of the first adder 7 signals is connected to the inputs of the third 8 and fourth 9 devices for generating a signal delay and to the first signal input of the second sou Matora signals 12, outputs the third 8 and fourth 9 forming the signal delay devices are connected to the inputs of the second two-position switch 10 whose output is connected to the second signal input of the second adder 12 the signals.

The output of the second signal adder 12 and the output of the voltage controlled oscillator 14 is connected to the inputs of the third signal adder 15, the output of the third signal adder 15 is connected to a bandpass filter 16, the output of which is connected to the input of the power amplifier 17, the output of which is connected to the input of the transmitting antenna 18, when the first 5 and second 10 on-off switches are controlled by the first 6 and second 11 on-off switches control devices, respectively, while the delay time of the first, second, third and h tvertogo forming apparatuses signal delays are not equal, the frequency shift of the first on-off switch 5 above the switching frequency of the second on-off switch 10, and the oscillator frequency range voltage controlled stored in the protected frequency range of device underside to the upper frequency fn the frequency FB.

The operation of the claimed device to counter radio-controlled explosive devices is as follows.

The signals are received by antenna 1, processed by receiver 2. From the output of receiver 2, the signal is supplied to the inputs of the first 3 and second 4 signal delay generating devices, respectively (can be made as a delay line) and to the first signal input of the first adder 7 signals, the outputs of the first 3 and the second 4 signal delay generating devices are connected to the inputs of the first on-off switch 5, the output of which is connected to the second signal input of the first signal adder 7. The on-off switch 5 alternately connects the outputs of the first 3 and second 4 devices for generating a signal delay with a frequency and duty cycle set by the device 6 for controlling the on-off switch 5.

Thus, at the output of the first adder 7 of the signals, a mixture of signals is formed, consisting of the sums of fragments of the received signals, which has a similar structure with a distorted information part due to transformations and shifts.

The output signal of the first adder 7 signals is supplied to the inputs of the third 8 and fourth 9 devices for generating a delay signal, respectively, and to the first signal input of the second adder 12 signals.

The on-off switch 10 alternately connects the outputs of the third 8 and fourth 9 devices for generating a signal delay with a frequency and duty cycle set by the device 11 for controlling the on-off switch 6.

Thus, at the output of the second adder 12 of the signals, a mixture of signals is formed, consisting of sums of fragments of an already distorted signal, which has a similar structure but an additionally deformed (distorted) information part.

The output signal of the second adder 12 signals and the output signal of the generator 14, voltage-controlled (VCO), excited by the shaper 13 of a periodic non-linearly varying voltage, are fed to the inputs of the third adder 15 signals.

Thus, at the output of the third signal adder 15, a signal mixture is formed, consisting of sums of fragments of multiply distorted signals, which has a similar structure to the input signals and a strongly distorted information part and is additionally mixed with the creeping interference from the generator 14 controlled by voltage in the same frequency range, deforming both the structure and the information part of the fragments of the input signal.

The output signal of the third adder 15 is sequentially fed to a band-pass filter 16, a power amplifier 17 and a transmitting antenna 18.

The band-pass filter 16 and the receiver 2 are tuned to the range of protected frequencies from the lower frequency fn to the upper frequency fv. The voltage-controlled oscillator 14, excited by the generator 13 of a periodic non-linearly varying voltage, provides the generation of harmonic signals in the same range of protected frequencies "running" from the lower frequency fн to the upper frequency fв.

The voltage-controlled generator 14 generates a signal whose frequency f continuously changes over a period of time T according to the law determined by the generator 13 of the periodic changing voltage. The receiving and transmitting antennas are sufficiently decoupled.

Adding the original signal with its time-shifted copy allows you to save the structure of the signal, but change it to the inability to detect (destroy) its information part. Since the inventive device performs this operation twice: on the adder 7, and then on the adder 12, the output signal of the adder 12 is an undetectable mixture with the structure of the original signals. In addition to this mixture, a sliding noise from the voltage controlled generator 14 in the same frequency range is mixed in, deforming both the structure and the information part of the input signal fragments. After such transformations, while maintaining the similarity of the structure of the initial signal, the detection of the output signal becomes impossible or will require significant time resources.

Filtered to the boundaries of the range of protected frequencies from the lower frequency fn to the upper frequency fv, the signal with excess power after the amplifier 17 is supplied to the transmitting antenna 18.

The choice of values of the switching frequency of the on-off switches is due to the maximum changes in the information part of the received signals precisely at these values and the simplicity of the concept.

Thus, changing the information part of the signal / signals, destroying, deforming and replacing individual fragments of the signal / signal structure together with the amplitude excess allows increasing the probability of radio suppression, and due to the new combination of features and the interaction algorithm of nodes corresponding to the declared features, simplifies the device, a decrease in its overall dimensions, while increasing the efficiency of radio suppression.

Sources of information

1. Ivliev S., Maistrenko N. et al. Search and disposal of explosive devices. - M.: Fund for Economic Security, 1996.

2. Petrenko E.G., Linkok A.A., Yakubchik A.Yu. Device for blocking radio fuses, patent N 2100752 from 11.22.96, MKI F41H 11/12, publ. BI N36, part 11, 1997, p. 391.

3. Battalov A.M., Gordon O.I., Konoplev V.A., Odnopalov I.A. Device for blocking radio fuses patent N 2131645 from 1998-05-26, MKI F41H 11/12, H04K 3/00

Claims (1)

A device for counteracting radio-controlled explosive devices containing a receiving antenna, a receiver, a non-linearly varying voltage driver and a voltage controlled generator, a bandpass filter, a power amplifier and a transmitting antenna, characterized in that a first, second, third and fourth signal delay generating device are introduced therein , first, second and third signal adders, first and second on-off switches, first and second on-off switches control devices, output the receiver is connected to the inputs of the first and second signal delay generating devices and to the first signal input of the first signal adder, the outputs of the first and second signal delay generating devices are connected to the inputs of the first on-off switch, the output of which is connected to the second signal input of the first signal adder, the output of the first signal adder connected to the inputs of the third and fourth signal delay generating devices and to the first signal input of the second signal adder, the strokes of the third and fourth signal delay generating devices are connected to the inputs of the second on-off switch, the output of which is connected to the second signal input of the second signal adder, the output of the second signal adder and the output of the voltage controlled oscillator are connected to the inputs of the third adder, the output of the third adder is connected to a band-pass filter, the output of which is connected to the input of the power amplifier, the output of which is connected to the input of the transmitting antenna, while the first and second on-off ne the switches are controlled by the first and second on-off switch control devices, respectively, the delay times of the first, second, third and fourth signal delay generating devices are not equal to each other, the switching frequency of the first on-off switch is higher than the switching frequency of the second on-off switch, and the frequency range of the voltage-controlled generator is in the range of frequencies protected by the device.

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