RU2475858C2 - Security and surveillance system - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: system has a sensor unit 1, a signalling unit 2, a video surveillance unit 3, an actuating device unit 4, first 5 and second 6 modems, an information processing and display unit 7, a radio channel 8, a switching unit 9, a video information superposition unit 10, a display unit 11, audio signal transmitting 12 and receiving 13 units, a video peephole 14, a video signal converter 15 and a low frequency amplifier with a microphone 16 (i=1, 2,…, n). The first modem 5 has driving generators 17.i, a first OR logic element 18, a modulating function former 19, an amplitude modulator 20, a modulating code former 21, a phase-shift modulator 22, a power amplifier 23 and a transmitting antenna 24.

EFFECT: high reliability of security and surveillance of residential facilities and other secure objects through use of a radio channel using signals with combined amplitude modulation and phase-shift modulation.

3 dwg

Description

The proposed system relates to security means, in particular to security systems using video tools, and can be used to prevent unauthorized access to protected (controlled) objects, such as residential apartments and premises.

Known devices and systems for protection and surveillance (ed. Certificate of the USSR No. 1348881, 1387029, 1690217, 1699013, 1774361; RF patents No. 2116673, 2117762, 2120139, 2163743, 2167432, 2221260, 2246736, 2255354, 2332721; US patent No. 5361070; UK patent No. 2258579; Dikarev V.I., Zarenkov V.A., Zarenkov D.V., Koinash B.V. “Protection of objects and information from unauthorized access”, St. Petersburg, 2004, Stroyizdat Publishing House St. Petersburg ”, 318 p. And others).

Of the known devices and systems closest to the proposed one is the "Security and Surveillance System" (RF patent No. 2120139, G08B 13/196, 1998), which is chosen as a prototype.

The known system comprises first and second modems, an information processing unit, a switching unit, a sensor unit, an alarm unit, a video surveillance unit, an actuator unit, a display unit, and provides security for residential premises with the possibility of monitoring directly from such premises.

At the same time, a collective communication line is established between the guarded objects and the control panel, which is used as a city telephone exchange.

However, this connection is vulnerable, not protected from unauthorized external influences, and does not provide high reliability of protection and surveillance of residential premises and other protected objects (warehouses, shops, garage, etc.).

An object of the invention is to increase the reliability of protection and surveillance of residential premises and other protected objects by using a radio channel using complex signals with combined amplitude modulation and phase shift keying.

The problem is solved in that the security and surveillance system, containing, in accordance with the closest analogue, the first and second modems, a switching unit, an information processing and display unit, as well as at each guarded object, a sensor unit, an alarm unit, a video surveillance unit, an executive unit devices, a unit for combining video information and a display unit for recording, analyzing, processing information, comparing it with information from a data bank and creating a database with its subsequent update, while the block of dates chikov is connected to an alarm unit, designed to issue an alarm, to regulate the response time of the actuator unit and their transition to standby mode when simulating the presence of the owner in the apartment, the output of the alarm unit is connected to the actuator unit and to the switching unit connected to the first modem and blocks for combining video information, the outputs of which are connected to the corresponding display units, and the inputs are connected to certain blocks of video surveillance, differs from the nearest The first modem is made in the form of n master generators, a first logical OR element, an amplitude modulator, the second input of which is connected to the corresponding output of the switching unit, a phase manipulator, the second input of which is through the former the modulating code is connected to the corresponding output of the switching unit, power amplifier and transmitting antenna, the second modem is made in the form of series-connected when I have antennas, n high-frequency amplifiers, a second OR gate, an amplitude limiter and a synchronous detector, the second input of which is connected to the output of the second OR gate, and the output is connected to the information processing and display unit, connected in series to the output of the amplitude limiter of the first multiplier, the second the input of which is connected to the output of the low-pass filter, n narrow-band filters, the third logical element OR, the second multiplier, the second input of which is connected to the output a an amplitude limiter and a low-pass filter, the output of which is connected to an information processing and display unit, the first and second modems being connected by a radio channel using complex signals with combined amplitude modulation and phase shift keying.

The structural diagram of the security and surveillance systems are presented in figure 1. The structural diagram of the first modem 5 is shown in figure 2. The structural diagram of the second modem 6 is shown in Fig.3.

The security and surveillance system contains at each guarded object, for example, an apartment, a sensor unit 1, an alarm unit 2, a video surveillance unit 3, an actuator unit 4, as well as modems 5, 6, an information and display processing unit 7, a radio channel 8, a switching unit 9 and a video information combining unit 10 and a display unit 11 introduced at each guarded object. The transmission units 12 and the reception 13 of audio signals are also introduced into the system at each guarded object. They can be installed separately or mounted directly on the body of the unit 3.

The first modem 5 contains serially connected to the output of the switching unit 9 of n master oscillators 17.i (i = 1, 2, ..., n), the first logical element OR 18, the amplitude modulator 20, the second input of which is connected through the generator 19 of the modulating function to the corresponding the output of the switching unit 9, the phase manipulator 22, the second input of which is connected through the driver 21 of the modulating code to the corresponding output of the switching unit 9, the power amplifier 23 and the transmitting antenna 24.

The second modem 6 contains a series-connected receiving antenna 25, n of high-frequency amplifiers 26.i (i = 1, 2, ..., n), a second OR gate 27, an amplitude limiter 28, and a synchronous detector 29, the second input of which is connected to the output of the second OR gate 27, and the output is connected to the information processing and display unit 7, the first multiplier 31, the second input of which is connected to the output of the low-pass filter 35, n narrow-band filters in 33.i (i = 1, 2, ..., n), the third is logical an OR element 34, a second multiplier 32, the second input of which is connected to the output of the amplitude limiter 28, and a low-pass filter 35, the output of which is connected to the information processing and display unit 7.

Consider an example of the application of the system within one entrance of a residential building.

CCTV blocks 3 are installed on the entrance doors of all the apartments of the entrance, as a block 3, a video peephole (camera) 14 with a video signal converter 15 and a low-frequency amplifier with a microphone 16 are used.

Similar CCTV blocks 3 are installed on the entrance door of the entrance and on the level of the third floor overlooking the courtyard (the use of nodes 16 in them is not mandatory).

The signals from blocks 3 are fed to blocks 10 combining video information installed in each apartment. The signals can be fed to blocks 10 through the coaxial cable of the collective television antenna. Block 10 combines information from different blocks 3 in one image frame, for example, from block 3.1 on the entrance door of the entrance, from block 3.2 installed in the entrance at the third floor level, from block 3.3 installed on the entrance door of the apartment and from block 3.4 installed on the landing of the floor. Block 10 combines the signals from various sources into a group signal, similar to how it implements a similar block described in US patent No. 5485221, CL. 348/563, published. 01/16/1996 g.

Information from all units 10 is fed to the inputs of the switching unit 9, which provides an alarm from unit 2 for communication between the subscriber who sent the alarm signal and the monitoring panel on which unit 7 is installed. Unit 9 is configured to select the required master oscillator 17 l, each of which generates harmonic oscillation

U _1i (t) = υ _i Cos (ω _i t + φ _i ), 0≤t≤T _i ,

where υ _i , ω _i , φ _i , Т _i - amplitude, carrier frequency, initial phase and duration of the i-th harmonic oscillation (i = 1, 2, ..., n);

n is the number of master generators, which is equal to the number of entrances of a residential building. Each entrance of a residential building has its own carrier frequency for transmitting an alarm signal to a monitoring station via a radio channel.

The harmonic oscillation U _i (t) from the output of the master oscillator 17.i through the OR gate 18 is fed to the first input of the amplitude modulator 20, the second input of which is supplied with a modulating function m _j (t) from the output of the modulating function generator 19, which is controlled by block 9 commutation (j = 1, 2, ..., m, where m is the number of apartments in the entrance). At the output of the amplitude modulator 20, a signal with amplitude modulation (AM) is generated

U _2i (t) = υ _i [1 + m _j (t)] · Cos (ω _i t + φ _i ), 0≤t≤T _i ,

where m _j (t) is the modulating function of the amplitude modulation,

which is fed to the input of the phase manipulator 22. At the second input of the latter, a modulating code M _j (t) is supplied from the output of the modulating code generator 21, which is controlled by the switching unit 9. The output of the phase manipulator 22 produces a complex signal with combined amplitude modulation and phase shift keying (AM-PSK)

U _3i (t) = υ _i [1 + m _j (t)] · Cos (ω _i t + φ _k (t) + φ _i ), 0≤t≤T _i ,

where φ _k (t) = {0, π} is the manipulated component of the phase that displays the law of phase manipulation in accordance with the modulating code M _j (t), and φ _k (t) = const for k · τ _e <t <(P +1) · τ _e and can change abruptly at t = k · τ _e ,

those. at the borders between elementary premises (k = 1, 2, ..., N-1);

τ _e , N - the duration and number of chips that make up a signal of duration T _i (T _i = N · τ _e ),

which, after amplification in the power amplifier 23, enters the transmitting antenna 24, is radiated by it, is received by the receiving antenna 25 of the monitoring console and through the high-frequency amplifier 26.i and the OR logic element 27 is fed to the first (information) input of the synchronous detector 29 and to the input amplitude limiter 28. The output of the latter produces a voltage

U _4i (t) = υ _ogre · Cos [ω _i t + φ _k (t) + φ _i ], 0≤t≤T _i ,

where υ _ogre is the limit threshold,

which is supplied as a reference voltage to the second (reference) input of the synchronous detector 29. At the output of the synchronous detector 29, a low-frequency voltage is allocated

U _Hi (t) = υ _нi [1 + m _j (t)],

where υ _нi = 1/2 · υ _i · υ _ogre , is proportional to the modulating function m _j (t),

which is fed to the input of information processing and display unit 7.

The voltage U _Oi (t), which is a complex signal with phase shift keying (PSK), from the output of the amplitude limiter 28 is simultaneously supplied to the first inputs of the multipliers 31 and 32. The reference voltage is supplied to the second input of the second multiplier 32 from the output of the OR gate 34

U _Oi (t) = υ _o · Cos (ω _i t + φ _i ), 0≤t≤T _i ,

The output of the multiplier 32 is formed by the total voltage

U _∑i (t) = υ _Н2 · _{Cosφ k} (t) + υ _Н2 · Cos [2ω _i t + φ _k (t) + 2φ _i ],

where υ _Н2 = 1/2 · υ _ogre · υ _o ,

from which the low-pass voltage is allocated by the low-pass filter 35

U _n2 (t) = υ _{n2 Cosφ k} (t),

which is fed to the input of information processing and display unit 7. On block 7, which is a computer located on the remote control 7 monitoring, recording, processing, analysis, display of information and its comparison with the information of the data bank, recording a new one in the data bank and issuing a message.

The voltage U _H2 (t) from the output of the low-pass filter 35 is simultaneously supplied to the second input of the first multiplier 31, at the output of which a reference voltage is generated

U _Oi (t) = υ ₁ · Cos (ω _i t + φ _i ) + υ _i Cos [ω _i t + 2φ _k (t) + φ _i ] = υ _i Cos (ω _i t + φ _i ) + υ ₁ · Cos (ω _i t + φ _i ) = 2υ _i Cos (ω _i t + φ _i ) = υ ₀ · Cos (ω _i t + φ _i ),

where υ _i = 1/2 · υ _ogre · υ _n2 ,

υ ₀ = 2υ ₁ .

This voltage is allocated by a narrow-band filter 33.i and through the OR gate 34 is supplied to the second input of the second multiplier 32 (i = 1, 2, ..., n).

Consequently, the second low-frequency voltage U _H2 (t) determines the number of the apartment into which an attempt is made to unauthorized entry with the aim of theft, the carrier frequency ω _i (i = 1, 2, ..., n) indicates the entrance of the house, and the first low-frequency voltage U _Hi (t) determines the content of the alarm voice message of the owner of the apartment into which the attackers are trying to penetrate. If the owner is not at home, then only a complex FMN signal is transmitted via the radio channel, which informs about the apartment theft from a particular apartment. After that, the service that performs maintenance of the monitoring console, on the basis of the received data, makes a decision on specific actions.

The principle of operation of block 2 alarm is as follows.

If an object (person) appears at the entrance door of the apartment in the coverage area of the corresponding sensor 1 and, after pressing the call, is delayed there for a certain (adjustable) time, sensor 1 is activated and block 2 gives an alarm signal to block 9, which, when activated, establishes a radio connection with the block 7. At the same time, block 2 supplies a signal to block 4 of executive devices, moreover, as one of the executive devices, a video recorder is used, which is located in an apartment in a hidden place to which information is recorded from tvetstvuyuschego unit 3 for a predetermined time, for example one minute, after which the absence of signal from the VCR unit 2 enters the standby mode. Actuators also use a television or other reproducing equipment, for example, a music center, which is turned on by a signal from unit 2 in the playback mode for a certain time, for example, for five minutes, in order to simulate the presence of the owner in the apartment during his absence. After the specified time, in the absence of a signal from block 2, the reproducing equipment goes into standby mode. If the owner is in the apartment, then block 2 is turned off and the alarm does not work. In this case, for example, after the doorbell rings, the host can turn on the TV, which is used as the display unit 11. At the same time, the same TV, working in different modes, can be used both as an actuator (block 4) and as a display unit 11, which is designed to record, analyze, process information, compare it with information from a data bank and create database with its subsequent update. The hardware and software for executing the display unit 11 is disclosed in GB 2258579A, H04N 7/12, 02/10/1993, in which the processor 15 and the display 16 are used to implement these functions. Several video frames coming from the unit 10 are displayed on the TV screen of the display unit 11 ( view from the entrance door, view from the third floor into the courtyard, view from the front door to the apartment and view from the landing of the floor). If necessary, in a dialogue mode, the owner can conduct a conversation with an object (person) located in front of the entrance door to the apartment, communication with which is provided by transmission and reception units 13 of 13 audio signals. In case of danger, the radio telephone of the monitoring station can be dialed, which will be an alarm. As an alarm the doorbell can also be regarded as a subsequent attempt to unauthorizedly open the front door. In this case, the entire system is activated.

By changing the location of alarm units and actuator units, you can protect a wide variety of objects,

Using the system allows video surveillance of a large number of objects with the ability to record, analyze, process information and create a database with its subsequent constant updating, and also allows monitoring not only from a certain remote remote control, but also directly from the apartment (from the monitoring object). This makes it possible to use the system in standalone mode (as an "electronic video watchman").

The widespread use of this system will allow you to effectively deal with phenomena such as apartment thefts and thefts at other secure objects (warehouses, shops, garages, etc.).

Thus, the proposed system, in comparison with the prototype and other technical solutions of a similar purpose, provides increased reliability of protection and surveillance of residential premises and other protected objects (cottages, warehouses, shops, garages, etc.). This is achieved by using a radio channel using complex signals with combined modulation and phase shift keying (AM - PSK).

These signals have high energy and structural secrecy.

The energy secrecy of complex AM-QPSK signals is due to their high compressibility in time and spectrum with optimal processing, which reduces the instantaneous radiated power. As a result, the complex AM-QPSK signal at the receiving point may be masked by noise and interference. Moreover, the energy of a complex signal is by no means small, it is simply distributed over the time-frequency domain so that at each point in this region the signal power is less than the power of noise and interference.

The structural secrecy of complex AM-QPSK signals is due to a wide variety of their forms and significant ranges of parameter changes, which makes it difficult to optimize or at least quasi-optimal processing of complex AM-QPSK signals of an a priori unknown structure in order to increase the sensitivity of the receiver.

These signals allow the use of a new type of selection - structural selection. This means that it becomes possible to separate signals operating in the same frequency band and at the same time intervals.

The proposed system is not subject to external unauthorized influences of both physical and electronic nature.

The implementation of the proposed system is advisable to carry out in stages.

At the first stage, the installation of video surveillance blocks at the entrance doors of apartments and in other places of protected objects in order to ensure video surveillance and two-way communication in the dialogue mode (using the system in the stand-alone mode of “electronic video watchman”).

At the second stage - after the installation of a sufficient number of subscribers, a radio channel and additional video surveillance units should be installed with the subsequent integration of all subscribers into a single system using a noise-resistant and reliable radio channel and complex signals with combined amplitude modulation and phase shift keying (AM-FMN).

Claims (1)

A security and surveillance system containing the first and second modems, a switching unit, an information and display processing unit, as well as a sensor unit, an alarm unit, a video surveillance unit, an actuator unit, a video information combining unit and a display unit for recording at each guarded facility, analysis, information processing, comparing it with the information of the data bank and creating a database with its subsequent update, while the sensor unit is connected to the alarm unit, designed to issue a signal t Evogi, to regulate the response time of the block of executive devices and their transition to standby mode when simulating the presence of the owner in the apartment, the output of the alarm unit is connected to the block of executive devices and to the switching unit connected to the first modem and video information alignment blocks, the outputs of which are connected to the corresponding blocks display, and the inputs are connected to certain blocks of video surveillance, characterized in that the first modem is made in the form of series-connected to n outputs of the comm unit of power, n master oscillators, the first logical OR element, an amplitude modulator, the second input of which is connected through the driver of the modulating function to the corresponding output of the switching unit, a phase manipulator, the second input of which is connected through the driver of the modulating code to the corresponding output of the switching unit, power amplifier and transmitting antenna , the second modem is made in the form of a series-connected receiving antenna, n high-frequency amplifiers, the second logical element OR, amplitude og nickel and synchronous detector, the second input of which is connected to the output of the second logical element OR, and the output is connected to the information processing and display unit, connected in series to the output of the amplitude limiter of the first multiplier, the second input of which is connected to the output of the low-pass filter, n narrow-band filters, third logical element OR, the second multiplier, the second input of which is connected to the output of the amplitude limiter, and a low-pass filter, the output of which is connected to the processing unit Info and display, the first and second modems are connected using a radio link complex signal combined with amplitude modulation and phase shift keying.

Images