The security device enclosed spaces from unauthorized retrieval of verbal information

 

The invention relates to the field of optics, in particular to devices protect private premises from unauthorized eavesdropping and recording of voice information using laser acoustic location systems. The technical result is the automatic creation of the photodetector laser acoustic location systems (RTLS) masking signal (at the wavelength of laser listening device), and the creation of false acoustic (speech-like) signals. In a device containing a retroreflector, a lifting rod, spring, stopper, platform and protective case, the piezoelectric element, the base of the retroreflector, the release mechanism of the stopper, block compression spring, the switch block compression spring, the compression mechanism of the spring, a photodetector, an amplifier, a shaping unit of acoustic signals, and the power source and the photodetector are electrically serially via the amplifier is connected to the release mechanism of the stopper, which is mechanically connected to the protective casing rigidly mounted on the platform; a photodetector through an amplifier electrically connected to the input of the block forming acoustic signals, the output of which is connected to Petaluma the PoE mechanically connected to the lifting rod, mounted within the spring, and one end is rigidly connected to the base of the retroreflector, and the switch block compression spring is electrically connected to the block compression spring and mechanically connected with the mechanism of the compression spring, which is mechanically connected to the base of the retroreflector, and the output of the power source is electrically connected to the photodetector, amplifier, mechanism for releasing the stopper, the switch block compression spring block spring block forming acoustic signals. 2 Il.

The device relates to the field of optics, in particular to devices for the protection of verbal information from closed areas from unauthorized eavesdropping and recording using laser radar systems.

Known devices intended to protect speech information in the premises indoors, on its inner reflecting surface or directly on the window glass served acoustic oscillations with amplitude, clearly exceeds the amplitude of the vibrations of the human voice (see, for example, U1 24610 EN 7, N 04 TO 3/00. The device vibro-acoustic masking noise areas (options) / Romanuk C. M., Fokin is called “acoustic white noise” quite easily filtered using the selection is certainly not relevant to the human voice frequencies. And of the remaining part of the spectrum of acoustic noise using the decomposition in amplitude and frequency quite easily distinguished modulating oscillations inherent in the voice of a man.

The known device the protection of voice information using the laser, creating noise sasvetochka interference photodetector laser acoustic location systems (RTLS). In such devices the laser radiation is directed onto the reflective surface of the premises so that the reflected signal from them was much higher than the amplitude of the reflected laser signal to the listening device (see, for example, “Overview of active technical means of information protection”. M., 1997, No. 6, S. 61-63).

The disadvantage of such devices is that to ensure reliable suppression of the photodetector laser acoustic locating system is necessary to determine the wavelength of laser radiation acoustic listening system, as in the receiving system laser acoustic locating system (LALS) typically used narrow-band interference filters, which cut off all wavelengths except the laser transmit channel. This will require a lot of power lasern the research institutes (especially their eyes).

The closest technical solution, selected as a prototype, is the device described in the copyright certificate №119200. Optical false goal /Sapronov A. S./. - 2225722; Appl. 30.09.77 year).

In Fig.1 shows a functional diagram of the device of the prototype, where indicated:

1 - retroreflector;

2 - lifting bar;

3 - spring;

4 platform;

5 is a protective case;

6 - stopper.

The device prototype has the following functional relation.

On the platform 4 one end of which is rigidly mounted a spring 3, within which the lifting rod 2. The lifting rod 2 together with the spring 3 is held in the original (compressed) position by means of the stopper 6. The second end of the spring 3 is mechanically connected with the retroreflector 1. Retroreflector 1, the lifting rod 2 and the spring 3 is mounted inside the protective housing 5 mounted on the platform 4.

The device prototype works as follows.

If necessary, releasing the stopper 6. Under decompresses the action of the spring 3 is an automatic lifting rod 2, and hence the retroreflector 1. When the incidence of the laser radiation on the retroreflector 1, it (radiation), in accordance with the laws of geometrical optimizely channels laser listening devices are located nearby, is “exposure” of the photodetector, the receiving channel. The result is that the useful signal (the signal to the listening device) will be masked reflected laser signal.

The drawback of the prototype is that the uncertainty of the time of operation of the laser acoustic locating system makes the device work for all possible (threatened) period listening device. In addition, without creating saswitch and/or simulation signals, the operation of the prototype may not be protecting information, but on the contrary increasing the possibilities of a listening device.

To address these shortcomings in the device containing the retroreflector, a lifting rod, spring, stopper, platform and protective case, inputs of the piezo, the release mechanism of the stopper, block compression spring, the switch block compression spring, the compression mechanism of the spring, a photodetector, an amplifier, a shaping unit of acoustic signals, the base of the retroreflector, and a power source connected as follows. The photodetector sequentially through an amplifier electrically connected with the release mechanism of separately electrically connected with the processing unit of acoustic signals, the output of which is electrically connected to the piezoelectric element.

The piezoelectric element is mechanically connected to the retroreflector rigidly fixed on the basis of the retroreflector, which is mechanically connected to the lifting rod installed inside the spring. The spring is mounted so that one end is fixed on the platform, and the second mechanically connected to the base of the retroreflector.

The switch block compression spring is electrically connected to the block compression spring, which is mechanically connected with the mechanism of the compression spring that is connected to the base of the retroreflector.

The power supply provides all of the elements of the device.

Introduction in a device of the above mentioned elements will allow to solve the problem of offline, online and enhanced protection mode information representing the state (military) a secret from unauthorised removal laser acoustic locating systems by automatically creating the photodetector laser acoustic location systems (RTLS) masking signal (at the wavelength of laser listening device), as well as the creation of false acoustic (speech-like) signals.

Comparative analysis of the prototype shows that INIA stopper, block compression spring, the switch block compression spring, the compression mechanism of the spring, a photodetector, an amplifier, a shaping unit of acoustic signals, and a power source connected in indicated in Fig.2 sequence substantially increase the efficiency and effectiveness of the protection of the premises against unauthorized retrieval of verbal information that constitutes state (military) a secret from unauthorised removal laser acoustic locating systems by automatically creating the photodetector laser acoustic location systems (RTLS) masking signal (at the wavelength of laser listening device), as well as the creation of false acoustic (speech-like) signals.

Thus, the inventive security device voice information from unauthorized removal meets the criteria of the invention of “novelty.”

The comparison of the proposed solutions not only prototype, but also with other technical solutions in this field of technology has allowed to reveal in them the features distinguishing the claimed solution to the prototype that allows to conclude that the criterion of “inventive step”.

In Fig.2 shows a functional diagram of the proposed device is

4 platform;

5 is a protective case;

6 - stopper;

7 - piezo;

8 - the basis of the retroreflector;

9 photodetector;

10 - amp;

11 - release mechanism of the stopper;

12 - power;

13 - switch block compression spring;

14 is a block compression spring;

15 block forming acoustic signals;

16 - the mechanism of compression of the spring.

The proposed device has the following functional relationships. Platform 4 is fixed protective housing 5 and one end of the spring 3. Inside the spring 3 is mounted a lifting rod 2 is mechanically fixed on the basis of the retroreflector 8, to which is rigidly attached to the second end of the spring 3. On the basis of the retroreflector 8 installed retroreflector 1, which is mechanically connected to the piezoelectric element 7. In the initial state, the spring is retained by the stopper 6.

The output of the photodetector 9 is electrically via the amplifier 10 is connected to the input of the block forming acoustic signal 15, the output of which is connected to the piezoelectric element 7 and the input of the release mechanism of the stopper 11, which is mechanically connected to the stopper 6. The switch block compression spring 13 is electrically connected to the block compression spring 14, which is mechanically connected with the raising of the second device operates as follows.

When getting laser listening device on the reflective surface of the protected premises or on its box it is automatically registered by the photodetector 9. The output signal of the photodetector 9 is amplified by the amplifier 10 and to the input of the release mechanism of the stopper 11. As a result, the stopper 6 releases the retroreflector 1. Under the action of the spring 3 retroreflector 1, fixed on the basis of the retroreflector 8, is mechanically connected to the lifting rod 2, out of the protective housing 5 and on its reflective surface also decreases the laser radiation. In accordance with the laws of geometrical optics, falling within 30-50on the retroreflector laser radiation is reflected strictly in the opposite direction, i.e. in the direction of the source of illumination, in which case it falls on the photodetector 9 and creates saswato interference.

From the second output of the amplifier 10, the signal of the photodetector 9 is fed to the input of block forming acoustic signals 15, which is activated and begins to produce noise (speech-like) signals to the piezoelectric element 7. The result reflected from the retroreflector 1 laser radiation provided the th fed to the input of the receiver laser listening device.

After work when the switch is pressed block compression spring 13 through the mechanism of compression of the spring 16 is compressed springs 3, resulting in the Foundation of the retroreflector 8 together with a fixed retroreflector 1 retracts into the casing 5.

The power source 12 provides the function of all blocks included in the proposed device.

The proposed device will significantly improve the efficiency and effectiveness of the protection of the premises against unauthorized removal of information that constitutes state (military) a secret, laser acoustic locating systems by automatically creating the photodetector laser acoustic location systems (RTLS) masking signal (at the wavelength of laser listening device), as well as creating false (disturbances) acoustic (speech-like) signals.

In the present experimental work confirming the correctness of the chosen solutions, and operation of the proposed device.

Implementation of the proposed device is not in doubt, as all the separate blocks and nodes included in it is well-known, widely described in the technical literature and can be used is subramania

The security device enclosed spaces from unauthorized retrieval of verbal information containing retroreflector, a lifting rod, a spring, a stopper, the platform and the casing, characterized in that it introduced the piezoelectric element, the base of the retroreflector, the release mechanism of the stopper, block compression spring, the switch block compression spring, the compression mechanism of the spring, a photodetector, an amplifier, a shaping unit of acoustic signals, and the power source and the photodetector are electrically serially via the amplifier is connected to the release mechanism of the stopper, which is mechanically connected to the protective casing rigidly mounted on the platform, thus, the photodetector through an amplifier electrically connected to the input of the block forming acoustic signals, the output of which is connected to the piezoelectric element and mechanically connected to the retroreflector rigidly fixed on the basis of the retroreflector, which are mechanically connected to the lifting rod, mounted within the spring, and one end of the spring is rigidly fixed to the platform and a second end rigidly connected to the base of the retroreflector, and the switch block compression spring electrically connected with nl is the use of a retroreflector, and the output of the power source is electrically connected to the photodetector, amplifier, mechanism for releasing the stopper, the switch block compression spring block spring block forming acoustic signals.

 

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FIELD: technologies for preventing interception of data.

SUBSTANCE: transferred signal is concealed via adding noises to communication line in speech frequency range with linear addition of speech data signal with noise signal of higher level. Concealment is removed via adaptive filtration of received signal with compensation of noise component and separation of data component. Addition of noises to communication line is performed from the side of sensor. Noise signal during addition of noises and adaptive filtration is formed of a sum of counts of several noise series with nonevent sizes via their random querying. At the beginning of each communication session a signal is sent to side of receiver, characterizing order of querying of series, and starting signal, providing for synchronism of noises addition and filtering processes. All operations are performed by means of microprocessors, mounted on both sides of communication line, dependently of loaded software providing for change of direction of transmission and protection of speech data signal. Invention allows to simplify protection while providing for absolute confidentiality of transmitted data.

EFFECT: higher reliability.

6 cl, 4 dwg

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