Device for alarm

 

The invention relates to the field of devices fire alarm ultrasonic type and can be used on objects of Informatization, where circulating acoustic information requiring protection. The technical result is to provide protection against leakage of acoustic information circulating in the protected area. For this purpose, the device comprises a generator emitting and receiving electroacoustic transducers of ultrasonic frequency, amplifiers high and low frequency, mixer, blocks signaling intruder and fire alarms, noise generator, a phase shifter, an attenuator, an adder, a radiating electro-acoustic transducer sound frequency. 2 Il.

The invention relates to the field of devices fire alarm ultrasonic type and can be used on objects of Informatization, which circulates acoustic information requiring protection against leakage.

Known devices for alarm (see, for example, ABT. St. USSR №291222, 06.01.1971; EP 0473835, 11.03.1992).

In the waveguide device. St. USSR №291222 to the output of the receiving electro-acoustic transducer connected to the amplifier NEs, consisting of two branches - the main and compensation, the output of which the signal is summed. After frequency processing the signal at the threshold and Executive units. Executive unit generates an alarm signal.

In the EP device 0473835 to the output of the receiving electro-acoustic transducer connected to two channels of signal processing - amplitude and frequency, with which the signal arrives at the storage unit and the unit of comparison. Output memory block signal is supplied to the unit of comparison. Block comparison generates an alarm signal.

Known analogues provide a signal about the fire or hit in the protected area of the offender in a changing interference pattern of the ultrasonic field for a certain period of time. However, these analogues have drawbacks. If the secured premises of acoustic information possible leak (unauthorized listening).

The closest to the technical nature of the claimed is a device for alarm ed. St. USSR №436373, M. CL. G 08b 13/18, Appl. 27.02.1973, publ. 15.07.1974.

The known device is the prototype consists of a generator, emitting and receiving the La low frequency, the alarm unit of the violator and the alarm unit on fire.

The first generator output is connected to the radiating electro-acoustic transducer of the ultrasonic frequency, the second oscillator output is connected to the second input of the mixer, the output of which is connected to the input of the low-frequency amplifier, the output of which is connected to the signal input of the alarm unit of the violator and the input of the unit fire alarm, the output of which is connected to the control input of the alarm unit of the violator, the input of the amplifier high frequency is connected to the receiving electro-acoustic transducer of the ultrasonic frequency, and the output to the first input of the mixer.

In case of fire or hit the intruder in the protected area changes the interference pattern established field of ultrasonic waves and device-prototype generates an alarm signal.

The disadvantage of the prototype is the possibility of leakage of acoustic information circulating in the secured premises.

The aim of the invention is to develop a device for alarm, providing protection against leakage of acoustic information circulating in the protected area by its noise.

For the response to the output of which is connected to the radiating electro-acoustic transducer of the ultrasonic frequency, and a second output connected to the second input of the mixer, the output of which is connected to the input of the low-frequency amplifier, the output of which is connected to the signal input of the alarm unit of the violator and the input of the unit fire alarm, the output of which is connected to the control input of the alarm unit of the violator, the amplifier high frequency, the input of which is connected to the receiving electro-acoustic transducer of the ultrasonic frequency, introduced additional noise generator, emitting electro-acoustic transducer sound frequency, phase shifter, attenuator, and an adder. The first output of the noise generator is connected to the radiating electro-acoustic transducer sound frequency, and the second to the input of the phase shifter. The output of the phase shifter connected to the signal input of the attenuator. The control input of the attenuator is connected to the second output of the amplifier high frequency, the first output of which is connected to the second input of the adder. The first input of the adder connected to the output of the attenuator and the output of the adder connected to the first input of the mixer.

Thanks to a new set of essential features, due to the introduction of noise generator and emitting electro-acoustic transducer zvukooperatora and adder is provided to compensate for the impact of masking noise on the operation of the device. This provides protection against leakage of acoustic information circulating in a protected area, and the ability to expand the scope of the claimed device, in particular for the protection of Informatization objects.

The analysis of the level of technology has allowed to establish that the analogues, characterized by a set of characteristics is identical for all features of the claimed technical solution is available, which indicates compliance of the device to the condition of patentability "novelty."

Search results known solutions in this and related areas of technology in order to identify characteristics that match the distinctive features of the prototype of the features of the declared object, showed that they do not follow explicitly from the prior art. The prior art also revealed no known effect provided (essential features of the claimed invention) transformations on the achievement of the technical result. Therefore, the claimed invention meets the condition of patentability "inventive step".

The claimed device is illustrated by drawings:

- Fig.1 is a structural diagram of the device;

- Fig.2 is a plot of signals explaining the operation device is niemnogo 3 electroacoustic transducers of ultrasonic frequency, amplifier high frequency 4, a mixer 5, the low-frequency amplifier 6, the alarm unit of the violator 7, block fire alarm 8, the noise generator 9, the radiating electro-acoustic transducer 10 audio frequency, the phase shifter 11, the attenuator 12 and the adder 13.

First 11the output of the generator 1 is connected to the radiating electro-acoustic transducer 2 ultrasonic frequency, the second 12the output of the generator 1 is connected to the second 52the input of the mixer 5. The output of the mixer 5 is connected to the input of the low-frequency amplifier 6. The output of the low-frequency amplifier 6 is connected to the signal 71the input of the alarm unit of the violator 7 and the input of the unit fire alarm 8. Exit block fire alarm 8 is connected to the control 72the input of the alarm unit of the violator 7. The input of the amplifier high frequency 4 is connected to the receiving electro-acoustic transducer 3 ultrasonic frequency. The first 91the output of the noise generator 9 is connected to the input of the radiating electro-acoustic transducer 10 audio frequency, and the second 92the output to the input of the phase shifter 11. The output of the phase shifter 11 is connected to the signal 121the input of the attenuator 12. Managing 122the input a is connected to the second 132the input of the adder 13. The first 131the input of the adder 13 is connected to the output of the attenuator 12 and the output of the adder 13 is connected to the first 51the input of the mixer 5.

The noise generator is designed to generate electrical oscillations "white noise". Circuit noise generators are known and described, for example, in the book Andrianova Century. And., Borodin, C. A., Sokolov, A. C. "Spy stuff" and device for protecting objects and information" (SPb.: DOE, 1996; for example, S. 144, Fig.3.29).

Radiating electro-acoustic transducer sound frequency is designed to convert electrical oscillations into mechanical. As such electro-acoustic transducer, you can use any broadband loudspeaker, for example, GD-36-40.

The phase shifter is designed to change the phase of the signal. Scheme phasers known and shown, for example, in the book Borowski, B. N., Kostenko Century. And., Mikhailenko, C. M., Partal O. N. "Reference schematic for the radio Amateur"./ Ed. by C. P. Borowski (K.: Machinery, 1987; for example, S. 275, Fig. 12.25).

The attenuator is designed to reduce the signal level. As the attenuator can be used in voltage divider circuits are known and described, for example, in books is" (M.: Radio and communication, 1982; for example, S. 55, Fig.4.3).

The adder is to add signals. Schema adders are known and described, for example, in the book title U., Schenk, K. "Semiconductor circuitry: a reference guide" (Tr., M.: Mir, 1982; for example, S. 137, Fig.11.1).

The device operates as follows. Ultrasonic oscillations produced by the generator 1 and received his first 11output for radiating electro-acoustic transducer 2 ultrasonic frequency is converted into mechanical and radiate out into the surrounding space. As a result of multiple reflections of the vibrations from the walls and objects in the room it is established the interference pattern of the ultrasonic field (Fig.2,and the small dotted line). The receiving electro-acoustic transducer 3 ultrasonic frequency perceives mechanical vibrations, converts them into electric and passes to the input of the amplifier high frequency 4.

When it occurs in a protected area of acoustic information (Fig.2,and the large dashed line), it spreads in all directions and paratragedy from walls and objects. Indoors is installed AC sound field. The interception of the information contained m the leak. To protect the acoustic information from leaking through these channels is used way active protection masking the noisiness. To this end electrical oscillations "white noise" generated by the noise generator 9 and received his first 91output for radiating electro-acoustic transducer 10 audio frequency is converted to mechanical and radiate out into the surrounding space. In a protected area, in addition to the existing ultrasonic field, the sound field is set to "white noise" (Fig.2,a - solid line). The intensity of this sound field noise is set such that the signal-to-noise precluded the possibility of information leakage.

Acoustic information circulating in a protected area, and established in a secure room sound field "white noise" have a mechanical effect on the receiving electro-acoustic transducer 3 ultrasonic frequency and its output is fed to the input of the amplifier high frequency 4.

When passing through the receiving electro-acoustic transducer 3 ultrasonic frequency and amplifier of high frequency 4, by virtue of their selective properties, the signal of ultrasonic frequency increases, and si is travelog field;

- weak signal sound field "white noise";

- weak signal containing the acoustic information.

In order to have a high intensity signal of the sound field of "white noise" had no effect on the stability of the device for the alarm and did not cause his false positives, the device entered a compensation circuit composed of the phase shifter 11, the attenuator 12 and the adder 13.

The second 92the output of the noise generator 9 electrical signal sound field "white noise" to the input of the phase shifter 11, in which the phase of the signal changes by 180and then the signal is sent to the signal 121input attenuator 12 (Fig.2,b). On managing 122input attenuator 12 from the second 42the output of the amplifier high frequency 4 receives the reference signal corresponding to the attenuation frequency sound range receiving electroacoustic transducer 3 ultrasonic frequency and amplifier of high frequency 4. The result of transformation of the signal in the phase shifter 11 and the attenuator 12, the signal level of the sound field of "white noise" at the output of the attenuator 12 (Fig.2) is equal to the signal level of the sound field of "white noise" on the first 41the output of the amplifier by first 131and the second 132the input signals are summed. In the result of the addition output of the adder 13 is formed a signal of ultrasonic frequency and attenuated signal containing the acoustic information (Fig.2,d). This signal comes from the output of the adder 13 to the first 51the input of the mixer 5. On the second 52the input of the mixer 5 is supplied a signal of ultrasonic frequency from the second 12the output of the generator 1.

The signal containing the acoustic information when going through the elements of the device, by virtue of their selective properties, is attenuated to a level not affecting the stability of the device for alarm, and it does not cause false positives.

When it occurs in the detection zone of a fire or trespassing, due to the change of the amplitude-phase relations and manifestation of the Doppler effect changes the interference pattern of the ultrasonic field, established in the protected area. Then the ultrasonic signal at the first 51the input of the mixer 5 is different from the ultrasonic signal at the second 52the input of the mixer 5. The difference of these two signals is allocated by the mixer 5, is input to the low-frequency amplifier 6, and then the signal is proizvoditsa analysis of the incoming signal frequency, the amplitude, duration and signals are formed on the occurrence of a fire or break-in to the object of the offender. From the output of the unit fire alarm 8 alarm about the presence or absence of fire comes to managing 72the input of the alarm unit of the violator 7, bringing together the blocks at their work.

Thus, the introduction of the device to the alarm generator noise radiating electro-acoustic transducer sound frequency, the phase shifter, attenuator, and adder allows you to provide masking of the noisiness of acoustic information to compensate for the influence of the sound field of "white noise" on the stability of the device. This will prevent the leakage of acoustic information circulating in a protected area, which will provide an extended field of use of the device.

Claims

Device for the alarm system comprising a generator, the first output of which is connected to the radiating electro-acoustic transducer of the ultrasonic frequency, and a second output connected to the second input of the mixer, the output of which is connected to the input of the low-frequency amplifier, the output of which is connected to the signal input of bloody alarm unit of the violator, amplifier high frequency, the input of which is connected to the receiving electro-acoustic transducer of the ultrasonic frequency, characterized in that additionally introduced noise generator, emitting electro-acoustic transducer sound frequency, phase shifter, attenuator, and the adder, the first output of the noise generator is connected to the input of the radiating electro-acoustic transducer sound frequency, and the second output to the input of the phase shifter, the output of which is connected to the signal input of the attenuator, the control input of which is connected to the second output of the amplifier high frequency, the first output of which is connected to the second input of the adder, a first input of which is connected to the output of the attenuator, and the output of the adder connected to the first input of the mixer.

 

Same patents:

The invention relates to the field of radio, namely the technique of intentional interference, and can be used to suppress the group of users of modern radio communication with unknown numbers using duplex frequency spacing configuration receiver and transmitter

The invention relates to techniques for optical communication and is designed to protect the voice data from eavesdropping

The invention relates to methods of active resistance means PVO

The invention relates to electrical engineering and can be used in the field of active electronic masking electromagnetic radiation

The invention relates to radio engineering and electronics and can be used in the generation of oscillations with a complex structure of the energy spectrum for testing and research immunity systems for various applications

The invention relates to techniques for combating commercial and industrial espionage

The invention relates to the field of radio engineering, in particular to methods of information protection from leakage through technical channels, and can be used for localization of technical channels of information leakage

The invention relates to electrical engineering and can be used for the jamming pulse-Doppler and pulsed radar (radar)

The invention relates to sonar means of fishing vessels

The invention relates to techniques for jamming

The invention relates to a security technique and can be used for protecting open areas from unauthorized access

Device for alarm // 2130201
The invention relates to techniques for alarm, namely, devices, security and fire alarm systems, and can be used to protect against intrusion of the intruder or fire

Seismic detector // 2032222
The invention relates to alarm systems, and can be used for protection of premises, vehicles, blocking sections of fencing

The invention relates to security devices and can be used to protect cars, motorcycles, garages, doors, rooms, Windows, balconies, safes

FIELD: guarding engineering.

SUBSTANCE: device comprises receiving member and equipment of observation station. The receiving system comprises modules made of geophones arranged over the boundary and inside the zone to be guarded in groups of three or more geophones, and unit of preamplifiers. The input of each preamplifier is connected with one or several geophones. The equipment of the observation station has unit of band-pass amplifiers connected with the unit of preamplifiers, arrangement for digital processing of signals, and power source.

EFFECT: enhanced reliability.

11 cl, 22 dwg

FIELD: intruder alarms for signaling about intrusion by perpetrators into guarded territory on basis of detection of characteristic mechanical oscillations of soil.

SUBSTANCE: device comprises one or a group of seismic receivers, installed in soil, which are joined by two-wire communication line with control panel. Seismic signal analyzer forms activation signal in case of appearance of perpetrators in seismic receiver detection zone. Transfer of information from seismic receivers to control panel and vice versa is realized by means of digital serial bidirectional receipt-transfer of information on basis of position-time code.

EFFECT: increased reliability of device due to ensured capacity for change of sensitivity of seismic receivers, provided addressed signal receipt mode from various seismic receivers and receipt of information for selection of moving objects on basis of mass.

4 cl, 15 dwg

FIELD: tool-making industry, possible use for protecting enclosed spaces.

SUBSTANCE: in accordance to the invention, registration of changes of aerial flow is performed in enclosed space constantly on basis of change of speed and/or temperature of air flow, and indication of signal is performed on basis of amplified signal of temperature sensor at frequencies below 50 Hz. Intruder alarm contains temperature indicator with first and second sensitive elements, amplifier, comparator and indication block. Both sensitive elements of sensor are included in bridge circuit, outputs of which are connected to input by bridge unbalance amplifier, output of which is connected to comparator, which produces signal for ensuring operation of indication block. Temperature indicator contains a sensitive element in form of two heat-variable resistors, positioned in the body and means for connecting sensitive element to measuring block. Body is divided on two sections by a wall, where one of sections is made with walls which allow passage of air flow, and other section - with walls, which do not allow passage of air flow. One heat-variable resistor is positioned in each section.

EFFECT: expanded functional capabilities, increased speed of operation, simplification and reduction of costs of manufacture and operation.

3 cl, 3 dwg

FIELD: physics.

SUBSTANCE: device includes seismic receiver, voice filter, envelope detector, indication calculation unit and surveillance interval generator, correlation unit and reference signal matrix, maximum vector detector and reference code register, threshold device and 'AND' circuit. To maintain high detection efficiency and jamming resistance, the device calculates 200 indicators, reference signal matrix and reference code register are used. Decision on detection of effective trespasser or group is made according to the maximum product of input signal indication vector to reference matrix, and jamming resistance is achieved due to definition of reference code, at which the said maximum product was obtained, and sending prohibiting or allowing signal to 'AND' circuit.

EFFECT: high efficiency of human detection, enhanced jamming resistance of device.

9 dwg

FIELD: information technologies.

SUBSTANCE: device comprises at least one main module (1), at least one module of bell button (2), which includes wireless transmitter, for signal transmission to bell signal receiver (4) of the main module. The main module consists of the following components: microcontroller unit (3); memory unit (6), which is electrically connected to microcontroller unit (3), for storage of one or several audio files; unit of wireless connection (5), for instance of, infrared transceiver connected to microcontroller unit (3), having possibility of double-ended connection to external device, preferably mobile cell phone or palmtop computer; receiver of ring signal (4), which is connected to mentioned microcontroller unit (3); detector of noise level (7), which is connected to mentioned microcontroller unit (3) installed inside the main module; at least one unit of sound reproduction (9) connected to microcontroller unit (3), and comprising decoder of audio file having at least one module of dynamics.

EFFECT: possibility to download new melody of ring from mobile device.

23 cl, 2 dwg

FIELD: information technologies.

SUBSTANCE: portable car alarm (100) for protection against a car theft or a break-in into a car (200) or other mobile item, with a locked cabin, comprises a body (1), having at least one hole (2) and a microphone (4) to detect infrasound; an electric circuit (5) inside a body (1) for processing of signals and for transfer of an alarm signal when a forcible break-in is detected; and inbuilt power supply (7), i.e. batteries. The body is equipped with guide elements (2, 9, 11) to ensure availability and free passage of air to hole (2) independently on orientation and position of the car alarm (100), which is quickly placed into the car cabin by an employee. Guide elements may be stands (9), which are closely located to the hole (2), a lattice (10), surrounding the hole (2) or, alternatively, surrounding the whole body (1), or may be formed by multiple holes in the body (1), arranged all over the body.

EFFECT: convenience of operation.

15 cl, 11 dwg

Up!