RU2716604C1 - Means for interlocking radio fuselors - 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. Facility comprises a generator of periodic nonlinearly varying voltage, a voltage-controlled oscillator (VCO), an inverter, a switch, a key control device, a band-pass filter for the whole range of protected frequencies from the lower frequency fl to the upper frequency fu, a power amplifier and an antenna. VCO generates a signal whose frequency f varies continuously over a time interval T according to a law determined by the generator of periodic varying voltage. Inverter inverts signal from VCO output. Signal from the VCO output and its inverted copy from the output of the inverter are supplied to the inputs of the switch, which successively in time outputs to the band-pass filter fragments of the signal from the output of the VCO and its inverted copy.

EFFECT: higher probability of guaranteed radio suppression at the same energy density of the interference signal in the protected range.

1 cl, 4 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 wide 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 means for blocking radio fuses is to increase the likelihood of guaranteed radio suppression at the same energy density of the interfering signal in the protected range.

The technical result is achieved due to the fact that an inverter, a second voltage-controlled generator, a band-pass filter, a control device and a key, a first signal input are introduced into the means for blocking radio fuses containing a non-linearly varying voltage driver and a voltage controlled generator, a power amplifier and an antenna which is connected to the output of the first voltage-controlled generator, the second signal input of which is connected to the output of the second voltage-controlled generator , the inputs of the first voltage-controlled generator and the inverter are connected to the output of the non-linearly varying voltage driver, the inverter output is connected to the input of the second voltage-controlled generator, and the key output is connected to the input of the 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 key is controlled by a control device, and its switching frequency is 5-22 kHz.

New features ensuring the achievement of a technical result are the additionally introduced inverter, a second voltage-controlled generator, a bandpass filter, a control device and a key, the first signal input of which is connected to the output of the first voltage-controlled generator, the second signal input of which is connected to the output of the second voltage-controlled generator, the inputs of the first voltage-controlled generator and inverter are connected to the output of a non-linearly varying voltage shaper In this case, the output of the inverter is connected to the input of the second generator controlled by voltage, and the output of the key is connected to the input of the 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, the key being controlled by the control device, and the switching frequency of the key is 5-22 kHz.

Such a technical solution in conjunction with new features provides:

universality of suppression of all types of modulation,

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.

The device uses the well-known frequency sweep method, which allows to radiate high power at each frequency or close frequencies sequentially in time. At the same time, at a certain frequency f (t), a signal of the required power sufficient for reliable protection is generated and radiated, and this frequency itself over a period of time, depending on the number n of the frequency drivers and the time T of the frequency sweep by one frequency driver, varies in the entire range of protected frequencies , "running through" all the values from the bottom to the top.

This technical solution is aimed at increasing the likelihood of guaranteed radio suppression in the protected band due to the variable structure of the interfering signal with its equal energy density.

The use of the method of discrete-fragmented filling of the spectrum increases the likelihood of suppressing functioning transmitters, which was confirmed experimentally.

In FIG. 1 shows a structural diagram of the inventive device, FIG. 2 - dependence of the output voltage of the shapers of a periodic changing voltage, in FIG. 3 - distribution of fragments of the generated frequencies over the protected range at the output of the key, in FIG. 4 - spectrum of the output signal in one of the time slices, the numbers indicate the order of movement of the fragments from the generated frequencies.

The device comprises a driver of a periodic non-linearly varying voltage 1, an inverter 2, a first voltage-controlled generator (VCO) 3, a second voltage-controlled generator 4, a key 5, a key control device 6, a band-pass filter 7 over the entire range of protected frequencies from the lower frequency fн to high frequency fv, power amplifier 8 and transmitting antenna 9.

The operation of the claimed means for blocking radio fuses is as follows.

The voltage-controlled oscillator 3 (VCO) generates a signal whose frequency f continuously changes over a period of time T according to the law determined by the generator 1 of the periodic changing voltage.

A voltage controlled oscillator (VCO) 4 generates a signal whose frequency f continuously changes over a period of time T according to the law determined by the shaper 1 of the periodic changing voltage, but in an inverse form due to an inverter 2, inverting the signal from the output of the shaper 1 of the periodic changing voltage.

The signal from the output of the VCO 3 and VCO 4 is fed to the inputs of the key 5, which sequentially in time outputs to the band-pass filter 7 signal fragments from the output of the VCO 3 and VCO 4. The band-pass filter 7 of the range of protected frequencies from the lower frequency fн to the upper frequency fв filters out high harmonics the order that occurs when switching the key. The output signal from the band-pass filter 7 is fed to a power amplifier 8, where it is amplified and comes to the transmitting antenna 9.

The switching frequency of the key 4 is 5-30 kHz, and the duty cycle of the key switching signal is 2. The choice of the key switching frequency is determined by the width of the communication channels and is sufficient to ensure significant deformations or violations of the information part of the suppressed communication signals.

This solution is equivalent to the presence of two signals, one of which is in the lower part of the protected range, and the other in the upper one. In this case, the amplifier operates in optimal mode.

Ceteris paribus, the device has a higher path speed of the interference harmonic signal over the protected range and a higher fragmented density of the suppressed signal in the entire protected range.

This provides increased jamming efficiency.

Thus, the proposed tool due to the new combination of features provides a simplification of the device, a decrease in its overall dimensions, while improving 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 (4)

A means for blocking radio fuses, comprising a non-linearly varying voltage driver and a first voltage-controlled generator, a power amplifier and an antenna, characterized in that an inverter, a voltage-controlled second generator, a band-pass filter, a control device and a key are connected to it, the first signal input of which is connected with the output of the first voltage-controlled generator, the second signal input of which is connected to the output of the second voltage-controlled generator, the inputs of the first voltage-controlled generator and the inverter are connected to the output of the non-linearly varying voltage driver, the inverter output is connected to the input of the second voltage-controlled generator, and the key output is connected to the input of the 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, the key being controlled by the control device, and the switching frequency of the key is 5-22 kHz.

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