RU2716390C1 - Device for protection against radio-controlled explosive devices - Google Patents

Abstract

FIELD: weapons and ammunition; radio engineering.

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 a receiving antenna, a receiver, an amplifier, a first bandpass filter, a first signal delay generating device, a second signal delay generating device, a first signal summator, a second signal adder, a third signal adder, a generator of periodic nonlinearly varying voltage, a voltage-controlled generator, a band-pass filter, a power amplifier and a transmitting antenna. Delay time of the first signal delay generating device is 0.25–0.50 times the period of frequency of the upper boundary of the protected range, and the delay time of the second device for generating signal delay is 1.00–2.00 times the period of frequency of the upper boundary of the protected range.

EFFECT: higher 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 drawbacks 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 bandpass filter, the second bandpass filter are introduced into the device for protection against radio-controlled explosive devices containing a receiving antenna, a receiver, an amplifier, a non-linearly varying voltage generator and a voltage controlled generator, a power amplifier and a transmitting antenna, the first device for generating a delay signal, the second device for generating a delay signal, the first, second, third adders, the output of the amplifier is connected to the inputs of the first a bandpass filter and a first delay generating device, the output of which is connected to the input of the second delay generating device and to the first signal input of the first signal adder, the output of the first bandpass filter is connected to the first signal input of the first signal adder, the output of which is connected to the first signal input of the second signal adder, and the second signal input of the second signal adder is connected to the output of the second delay generating device, the output of the second signal adder is connected to the first signal the input of the third signal adder, the second signal input of the third signal adder is connected to the output of the generator by a controlled voltage, the input of which is connected to the output of a non-linearly varying voltage driver, the output of the third signal adder is connected to the input of a second band-pass filter, the output of which is connected to the input of the power amplifier, the output of which connected to the input of the transmitting antenna, while the delay time of the first device for generating a signal delay is 0.25-0.50 per and upper limit frequency of the protected range, and the duration of the delay of the second delay signal forming apparatus is 1.00-2.00 period duration frequency upper limit of the range to be protected.

New features that ensure the achievement of the technical result are the additionally introduced the first bandpass filter, the second bandpass filter, the first device for generating a signal delay, the second device for generating a signal delay, the first, second, third signal adders, the output of the amplifier is connected to the inputs of the first bandpass filter and the first device forming a delay, the output of which is connected to the input of the second device for forming a delay and to the first signal input of the first adder of signals, One of the first bandpass filters is connected to the first signal input of the first signal adder, the output of which is connected to the first signal input of the second signal adder, and the second signal input of the second signal adder is connected to the output of the second delay shaping device, the output of the second signal adder is connected to the first signal input of the third adder signals, the second signal input of the third signal adder is connected to the output of the generator by a controlled voltage, the input of which is connected to the output of the l of a non-linearly varying voltage, the output of the third signal adder is connected to the input of the second 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 delay duration of the first signal delay generating device is 0.25-0.50 the duration of the upper frequency frequency period protected range, and the delay time of the second signal delay shaping device is 1.00-2.00 the duration of the frequency period of the upper boundary is protected th range.

Such a technical solution in conjunction with new features 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 likelihood 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 a / signals when separate fragments of the structure of these signals / signals are destroyed, with an equal energy density in the protected range, like the prototype.

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 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, an amplifier 3, a first band-pass filter 4, a second device for generating a signal delay 5, a second device for generating a signal delay 6, a first adder of signals 7, a second adder of 8 signals, a third adder of 9 signals, a shaper of non-linearly varying periodic voltage 10, a voltage controlled oscillator (VCO) 11, a bandpass filter 12, a power amplifier 13, and a transmit antenna 14.

The operation of the claimed protection device is as follows.

The signals are received by antenna 1, processed by receiver 2 and amplified by the first amplifier 3. From the output of the first amplifier 3, the signal passes through a band-pass filter 4 and in parallel through a delay device 5 (can be made in the form of a delay line). The signals from the output of the bandpass filter 4 and the delay device 5 are summed up by the first adder 7 of the signals, and the result of the summation from the output of the delay device 5 is fed to the first inputs of the second adder 8 of the signals, and the signal from the output of the delay device 5 is further processed to the second input of the second adder 8 of the signals delay device 6.

The output signal of the second adder 8 is summed by the third adder 9 of the signals with the output signal of the generator 11, controlled by the voltage (VCO), excited by the shaper periodic non-linearly changing voltage 10.

The output signal of the third adder 9 is sequentially fed to a band-pass filter 12, a power amplifier 13 and a transmitting antenna 14.

Bandpass filters 4 and 12 are tuned to the range of protected frequencies from the lower frequency fн to the upper frequency fв. The voltage-controlled oscillator (VCO) 11 excited by the generator of the periodic non-linearly varying voltage 10 also generates harmonic signals in the range of protected frequencies from the lower frequency fн to the upper frequency fв.

A voltage controlled oscillator (VCO) 11 generates a signal whose frequency f continuously changes over a period of time T according to the law determined by the shaper 10 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 (disrupt) its information part. Since the inventive device performs this operation twice: on the adder 7, and then on the adder 8, the output signal of the adder 8 is a practically undetectable mixture with the structure of the source signals. In addition to this mixture, a sliding noise is mixed with VCO 11 in the same frequency range, which violates or deforms the structure and the information part of the fragments of the input signal.

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 13 is supplied to the transmitting antenna 14.

The choice of device duration values is due to maximum violations of the information part of the received signals precisely at these values and ease of implementation.

Thus, the destruction of the information part of the signal a / signals, the destruction of 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 the nodes corresponding to the declared features, it simplifies the device and reduces its overall dimensions indicators, while this allows to increase 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 N 36, 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 (2)

A device for protection against radio-controlled explosive devices containing a receiving antenna, a receiver, an amplifier, a non-linearly varying voltage driver and a voltage controlled generator, a power amplifier and a transmitting antenna, characterized in that a first band-pass filter, a second band-pass filter, a first shaping device are inserted signal delay, a second device for generating a signal delay, the first, second, third signal adders, the output of the amplifier is connected to the inputs of the first bandpass filter and the first th delay generating device, the output of which is connected to the input of the second delay generating device and to the first signal input of the first signal adder, the output of the first bandpass filter is connected to the first signal input of the first signal adder, the output of which is connected to the first signal input of the second signal adder, and the second signal input of the second signal adder is connected to the output of the second delay generating device, the output of the second signal adder is connected to the first signal input of the third adder signals, the second signal input of the third signal adder is connected to the output of the generator by a controlled voltage, the input of which is connected to the output of the of a nonlinearly varying voltage, the output of the third signal adder is connected to the input of the second 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 delay duration of the first signal delay generating device is 0.25-0.50 the frequency period of the upper boundary of the protected range, and the delay time of the second device for generating a signal delay is 1.00-2.00 the duration of the frequency period of the upper boundary of the protected my range.

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