RU1761U1 - STATIONARY PROTECTION SYSTEM - Google Patents

Abstract

SYSTEM OF SECURITY OF STATIONARY OBJECTS, containing several groups of sensors installed on guarded objects and connected by multi-frequency communication channels to several subscriber stations, connected by multi-frequency communication channels to a number of regional stations connected by multi-frequency communication channels to the head station, characterized in that the subscriber and regional stations are equipped signal processing devices, communication channels are bi-directional, and protective equipment is installed at the guarded objects.

Description

SYSTEM OF SECURITY OF STASNARY OBJECTS,

The invention relates to signaling means, namely to alarm signaling systems with their transmission to a central station

The known system for the protection of stationary objects described in Japan No. 2-30077 cells. I08 V 25/00, 25/08, 25/10, c. 07.07.b3, op 04.07.90. A method for transmitting and processing surveillance signals in an alarm system.

The known system contains several subscriber stations equipped with an identification code and connected by single-frequency wireless communication channels to a control station for processing signals from subscriber stations connected by a wireless communication channel to the head station. The disadvantage of the known system is that it is not reliable, because there is no information processing at the subscriber stations and there are no reverse communication channels for the quick response of the system to an alarm signal.

Closest to the technical nature of the claimed is the system of protection of stationary objects, described in s "France

No. 2661023 by class еУВ В 25/00, 26/00 Remote security system for residential premises and selected as a prototype

The known system contains groups of sensitive probes (sensors) installed on guarded objects and auxiliary beacons (stations) connected to groups of wireless unidirectional multi-frequency communication Kaiia, each of which is several. auxiliary beacons are connected by wireless unidirectional multi-frequency communication channels with one of several motherboards ШШ-5: G-06 В аУУОО, 25У10, 26/00

(.,

-;

beacons (stations) connected by wireless unidirectional multi-frequency communication channels to the central console of the head station.

A disadvantage of the known system is its low reliability due to the fact that it does not process information at intermediate stages and the connection between the elements of the system is unidirectional, i.e. only the probes are interrogated and the received signals are transmitted sequentially from the auxiliary beacons through the fallopian beacons to the central console of the head station without checking the reliability of the information and the possibility of a protective response of the system elements at the protected sites.

The purpose of the claimed utility model is to increase the reliability of the system

This goal is achieved by the fact that, in the security system of stationary objects, containing several groups of sensors connected by multi-frequency communication channels with several subscriber stations, connected by multi-frequency communication channels with regional stations connected by multi-frequency communication channels with the head station, according to the utility model, subscriber and regional The stations are equipped with signal processing devices, and the communication channels are bidirectional, while at the same time the security facility | PP, protective media are installed Introduction of processing equipment at outdoor stations in conjunction with

directional allows you to double-check the information received) / to exclude the reaction of the security system to a false or accidental signal and to promptly put in place law enforcement and protective equipment at the protected facility, ensuring reliable functioning of the signal protection system at the subscriber and regional levels. the implementation of the communication channels two. The presence of processing devices at each stage of the system and the execution of the communication channels bi-directional in conjunction with the installation of protective equipment at the security facility ensures that the claimed security system differs from the prototype and allows the claimed technical solution to be considered as meeting the novelty criterion.

The possibility of widespread use of the claimed system for the protection of a large number of stationary objects at the same time, especially in the criminal situation in the country, indicates the compliance of the utility model with the criterion of past applicability.

The inventive utility model is illustrated by drawings, which are shown in:

-Fig. I - structural diagram of the system of protection of stationary objects;

-Fig, Z - functional system of the security system;

-Fig 3 - functional diagram of the radio receiving path;

-Fig, 4 - functional diagram of the transmitter;

-Fig. 5 is a block diagram of a subscriber station controller;

-Fig. 6 is a block diagram of a subscriber controller operation algorithm

station

-Fig, 7 - block diagram of the regional station controller;

-fig, 8 - block diagram of the algorithm of the regional controller

station.

The security system of stationary objects is arranged as follows (see Fig, I and Fig, 2),

At each guarded object (apartment, warehouse, store, etc.), security sensors I are installed, which generate alarms (violation of the security mode, fire alarm, backup calls), as well as a subscriber station P containing antenna I, receiver 2, transmitter 3 , unit 4 for interfacing the controller with the receiver and transmitter, controller 5, the encoding key 6, and interface 7 for pairing the sensor with

the controller. At the same time, security sensors I can be installed on three platforms X) for example / for guarding the facility along the perimeter, at the entrance to the guarded facility and at a specific location on the facility itself and connected by wired connection to the AoN station Aoentent stations П with wireless multi-frequency bidirectional communication channels connected to one from regional stations Sh, Protected facilities of U are also installed at the protected site.

Each of the regional stations W is installed in the center of the group of protected objects and contains an antenna 8, a receiver 9 and a transmitter 10 for communication with subscriber stations P, a device II for interfacing a communication channel with subscriber stations P, a controller 12, a device 13 for interfacing a communication channel with a head station 1U , antenna 14, receiver 15 and transmitter 16 for communication with the head station 1U. Regional stations Sh are connected by wireless multi-frequency bidirectional communication channels with the head station 1U "

The head station IU is installed in the security service and includes an antenna 17, a receiver Ib, a transmitter 19, a controller 20 and a console 21. It is connected by wireless multi-frequency communication channels to regional stations Ш "

Appointment and implementation of nodes and blocks of the system (Fig. 2) trace

Sensors I

Security sensors I serve for triggering in case of violation of the protected space.

They can be vibrational, infrared, induction, etc. For example, it can be radio-beam sensors for perimeter protection, capacitive sensors, magnetic sensors of the Penza software Sta

(see PKOZ-0112-2),

g A /, 9 /

Virator (see L, M, Kuzinets et al. Reception television equipment p. 406-407, Fig. 10.3),

The receiver of the subscriber station P is intended for receiving and pre-shaping signals from the regional station III and is made according to the scheme shown in Fig. 3. Receiver 2 contains a series-connected first band-pass filter 24, a high-frequency amplifier (UHF) 25 with an adjustable gain and a tunable cascade, a second bandpass filter 26, mixer 27, a third bandpass filter 2b, an intermediate-frequency amplifier (IFA) 29 with adjustable gain, an amplitude detector 30, a first DC amplifier 31 and a voltage comparator 32 I with an adjustable threshold, as well as a series-connected heterodyne voltage amplifier 33 and a fourth band-pass filter 34, the output of which is connected to the second input of the mixer 27, and an automatic gain control (AGC) detector 35, the input of which is connected to the output of the intermediate frequency amplifier (UPC) 29 and the output is connected to the input of the second DC amplifier 36 connected by the output to the second input of the UHF 29 and the second input of the UHF 25,

The band-pass filter 24 at the input of the receiver serves to filter out harmonics and has a passband of 30 dB at the level of 0.5 MHz, Filter 24 is made according to the scheme described in the book by S.G., Kalimkhan, Levin Fundamentals of the theory and calculation of broadcasting receivers on semiconductor devices M Communication, 1969, p. 291, fig. 7.4,

The high-frequency amplifier 25 with an adjustable gain and a gated cascade is designed to amplify the input signal and has a gain of Kys + I5 dB, in construction mode dB. The amplifier is made according to the scheme described in the book C, G. Kalimkhan, I, M, Levin Fundamentals of the theory and calculation of broadcasting receivers on semiconductor priors M, Svy;

D / - s / 7 7, i /,

1969, p. 20g, fig. 6.1.

The band-pass filter 26 serves to filter out harmonics and has the same characteristics as the filter 24, and is made in the same way.

The mixer 27 mixes the input signal with the local oscillator frequency into an intermediate frequency signal and has a Kyel-i2 dB gain. The mixer 27 is made according to the scheme described in the book S.G. Kalimkhan and Ya.M. Levina Fundamentals of the theory and calculation of broadcasting receivers on semiconductor priors M, Svyaz, 1969, pp. 240-241 fig. 6.II.

The band-pass filter 28 is designed to transmit the signal from the mixer 27 to the intermediate-frequency amplifier 29 in the band i 40 to at the level of 0.2 MHz. The circuit of the filter 28 is described in the book mentioned above.

The intermediate frequency amplifier 29 amplifies the signal from the output of the mixer 27 and has an adjustable gain of Ku + 70-gSh dB with a control range of 60 dB. UPCH is made according to the scheme described in the book by S.G., Kalimkhan, Levin Fundamentals of the theory and calculation of broadcasting receivers on semiconductor priors, M. Svyaz, 1969, p. 292 fig. 7.6.

An amplifier 29 is connected to an automatic gain control (AGC) circuit of the AGC detector 35 and a DC amplifier 36 in the AGC circuit with a gain of dB, described in the book by S.G. Kalimkhan, HJ4. Levina Fundamentals of the theory and calculation of broadcasting receivers on semiconductor devices, M. Svyaz, 1969, p. 464 fig. 10.4.

The amplitude detector 30 is used to detect the amplitude-modulated signal and is described in the above-mentioned book S. G. Kali Khan, Y.M. Levin st. 359 images F1.

The DC amplifier 31 amplifies the signal from the output of the detector 30 and has a gain of dB. Amplifier 31 is made according to the scheme described in the book S.G., Kalimkhan, I, M. Levina Fundamentals of the theory and calculation of broadcasting receivers on semiconductor devices at Oora M, Svyaz, 1969, p. 432 fig. 9.10,

The comparator W with a fixed threshold set during tuning filters out hardware noises and is made according to the scheme described in Analog and Digital Integrated Circuits, ed. Yakubovsky M..Radio and Communications, 1984, p. :: JII, Fig. 6.30.

The local oscillator voltage amplifier 33 amplifies the signal from the local oscillator (not shown in the drawing) and has a gain of dB. The amplifier is made according to the scheme presented in the book C "D" Kalimkhan, I "And" Levin Fundamentals of the theory and calculation of broadcasting receivers on semiconductor devices, M. Svyaz, 1969, p., JSI2 fig. 6.2,

The band-pass filter 34 passes to the mixer 27 a signal from the local oscillator in the -20 dB band at the level of 0.2 MHz and is made according to the scheme described in the book of S.G., Kalimkhan, Ya, Y1, Levin Fundamentals of the theory and calculation of broadcasting receivers on semiconductor devices M. Svyaz, 1969, p. 291 rice, 7.4,

The receivers 9 and 15 of the regional StanBSh Ш and the receiver 18 of the head station 1U are made according to a similar scheme.

The transmitter 3 of the subscriber station is used to transmit a signal from the subscriber station And to the regional W and is made according to the scheme shown in Fig. 4, The transmitter 3 consists of series (connected by a master oscillator 37, a frequency multiplier 38 by a tr modulator 39, a three-stage power amplifier 40, output filter 41

 (99Jr

The master oscillator 37 is used to generate a signal of a frequency of 50-60 MHz and is made on a high-frequency transistor according to the scheme described in book E, Red Reference for high-frequency circuitry, M, Mir, 1990

The multiplier 3b is designed to be multiplied by 3 frequencies of the master oscillator 37 and is made on the transistor KG 36v A according to the scheme described in the book Radio transmitting devices, ed. . Blagoveshchenskogo, rjA, Utkina, M. Radio and communications, 19a2, p. 134 fig. 8 "2,

The modulator 39 serves as a key, passing or not passing a high-frequency signal from the output of the multiplier 3b to the input of the power amplifier 40, depending on the presence of a control signal from the controller at its second input. Modulator 39 is made according to the scheme described in the book Radio transmitting devices, ed. M, B, Blagoveshchensk M, Radio and communications, 1982, p. 292, fig. 21.1

The three-stage power amplifier 40 is designed to amplify the signal power and has a gain of 40 dB, and the output power is 6 watts. It is made on transistors KG 362, KT 610, KG 920 V, according to the cascade described in the book Radio transmitting devices, ed., M, V, Blagoveshchenskogo, M Radio and communications, 19v2g, p. 106 fig., 6.2,

The output filter 41 serves to filter the higher harmonics and has a bandwidth of 3 MHz at the level of - 3 dB with attenuation in the band of 0.5 dB. It is filled according to the scheme described in book C, D. Kalimkhan, Ya.M., Levina Fundamentals of the theory and calculation of broadcasting receivers on semiconductor devices, M, Communication, 1969, p. 291 fig. 7.4,

-10- ,

44 input-output in controller 5 and is executed on the buffer registers K 555 IR 22, K 555 IR 23 (see VL. Shilo Popular digital circuits, Metallurgy Chelyabinsk, 19L9g, p. 122).

The controller 5 is designed to receive signals from sensors I, recheck them, generate a message about the status of sensors I and control their transmission to the regional station W. Controller 5 is made according to the scheme shown in FIG. 5.

The controller 5 contains a microprocessor 42, read-only memory (ROM) 43, an input / output device 44, a source

45 food

The microprocessor 42 is used for the above signal processing and is executed on the K I8I6 Вё51 microcircuit (see V.V. Stashin et al. Designing digital devices on single-chip computers, M. Energoatomizdat, 1990 p. 50)

Permanent memory device 43 is used to store the microprocessor program, has a capacity of at least 2 Kbytes and is made on K 573 Pi2, K 573 P microcircuits (see the Semiconductor LSI memory devices, M, Radio and Communication I9SSri., P. 303).

The power supply 43 ensures the normal functioning of the controller and is designed for a voltage of 12 V (see B.C. Putnikov Integrated Electronics in Measuring Devices, L. Atomizdai 19aYag., P. 61),

Coded electronic lock 6 is for identification

the station is turned on and is executed, for example, in the form of a mechanical lock with a secret part connected to an encoder message shaper made on a chip of type 561 Ш11, 561 ИЕ10, 561 ЛА9, (see V.L. Shilo Popular digital circuits Metallurgy , Chelyabinsk, 1989).

// -

The interface device 7 serves to coordinate the sensors I with the controller 5 and is an input-output device made on the buffer registers K 555 IR22, K 555 IR23 (see above).

Regional stans and W,

Antenna 8 of regional station Ш is intended for communication between regional station Ш and subscriber station P and is a discount antenna (see, D “M“ Sazonov Antennas and microwave devices, M. Higher School, 1988, p. 251, Fig. 10.7)

The receiver 9 is designed to receive signals from the subscriber station P and is made as described above (see Fig "3).

The transmitter 10 is used to transmit a signal from the regional station W to the subscriber station P and is made according to the scheme shown in Fig, 4, when the frequency of the master oscillator in it is 50-60 MHz,

The pairing device II serves to coordinate the receiver 9 and the transmitter 10 with the controller 12 and is an input-output device 49 in the controller 12, made on the ports K 5dO BB55, K 580 BB5I S. References Microprocessors and MicroES in automatic, control systems, L. Mechanical Engineering, 1987, her. 85, 177),

The controller 12 is designed to receive data on the status of the subscriber station P, store and manage their transmission to the headend 1U and is made according to the scheme shown in FIG. 7,

The controller 12 contains a microprocessor 46, read-only memory 47, random access memory 48 (RAM), input / output device 49, and a power supply 50.

The microprocessor 46 serves for the above work with signals and is executed on the microcircuit 80 (see M. Rafakuzaman Microprocessors and machine design of microprocessor systems, M., Mir,

i "

-GA- /

1988 s, 71),

The read-only memory device 47 is intended for storing the program of work of the microprocessor 46, has a memory of at least 2 k / bytes and is executed on the K 573 RF2 microcircuit (see above).

Random access memory 48 is used to store data received from subscriber stations P, has a memory capacity of at least 4 k bytes and is executed on K 573 RUUI (see the Manual Semiconductor LSIs of memory devices M ,, Radio and Communications 1967, p. 199)

The power supply 50 provides the normal operation of the controller 12 and is designed for a voltage of 12 V (see above)

The algorithm of the controller 12 is shown in Fig, 8,.

The interface device 13 serves to coordinate the lid controller with the receiver 15 and the transmitter 16 and represents the input / output device 49 in the controller 12, made on the ports K 580 BB55, K 5Sh BB5I (see above).

Antenna 14 is designed to connect the regional station Ш with the head station Ш and is made by analogy with antenna 8,

The receiver 15 serves to receive signals from the headend 1U and is made in the same way as the receivers 2 and 9

The transmitter 16 is designed to transmit signals from the regional station W to the head station 1U and is made according to the above scheme with the only difference being that the frequency of the master oscillator is

3 times higher than at the subscriber station (150-160 MHz).

The head station 1U Antenna 17 is designed for communication with regional stations

W and performed omnidirectional (see, for example, the turnstile antenna described in the book D, M, Sazonov Antennas and microwave devices, M. Higher School, 198b., pp. 251-253)

-fs- w- -

and is made as described above (see Fig. 3).

The transmitter 19 is designed to transmit signals from the headend 1U to the regional stations Ш made according to the scheme presented in fdg, 4 with the frequency of the master oscillator

The interface device 20 serves to coordinate the receiver 16 and the transmitter 19 with the controller 21 and is an input-output device in the controller 21, similar to that in the controllers II, 13 of the PC,

The controller 21 performs the functions of the Olock control in the headend and is made according to the scheme shown in Fig 7,

The interface device serves to coordinate the controller 21 with the remote control 23 and represents the input / output device in the controller 21 (see above).

The remote control 23 is designed to display information received from regional stations 1U, and is made on ESh 1Sh ATZb,

Protective equipment U serves for triggering on command and can represent, for example, a gas cylinder.

The operation of the security system of stationary objects.

Before starting work at subscriber stations P, a code electronic key 6 is set by the operator to the On state, an operating supply voltage is supplied to all nodes of the subscriber, regional and head stations, all stations are turned on in the “

The security system of stationary objects works as follows.

In Generalized form, in accordance with the structural diagram (Fig. I), each subscriber station P interrogates its sensors over a wired communication with a frequency of 150-160 MHz

 , and l /} ff (

Information about serviceable, faulty, and triggered by alarm sensors enters the subscriber station P, where the signal is smoothed out, and recorded in it. Moreover, information about sensors I that have been triggered by an alarm in the period between requests is also recorded in subscriber station P,

Each regional station Ш, in turn, with a frequency of 420-450 MHz through wireless communication channels sequentially polls its subscriber stations P, At the request signal, the information recorded in the subscriber stations P and attesting to the status of the sensors, sequentially goes to the regional station Ш, where it is processed, which consists in repeating the request, recording information, identifying information about subscriber stations, filtering out information about serviceable and not working stations, and generating a word about otanpih and faulty stanschyah for subsequent transmission to the headend.

The head station 1U through a two-way wireless communication channel operating in the frequency range 450-700 MHz, every 10 seconds sequentially polls all regional stations Sh,

Upon a request signal from 1U headends, information about malfunctioning and alarm triggered stations is sent to the 1U headend, where it is recorded and displayed on the ES screen for the operator to make a decision about responding to a malfunction or an alarm.

In addition, once a day, a list of its subscribers is transmitted to each regional station Ш from the head station 1U and the table is updated. At night, this table at the initiative of the head station 1U is rechecked for screening false messages, and if any, then a request is received from the head station 1U to the regional station Ш to obtain information about its subscriber stations P "

i

In more detail, in accordance with the $ | functional and other schemes of Sf1G “2-9), the operation of the security system for community facilities can be described as follows.

In subscriber stations P, in accordance with the program recorded in ROM 43, the microprocessor 42 of the controller 5 polls the code electronic key 6 and the sensors I, Information about the state of the sensors I is recorded in the th processor 42 and stored there until a request arrives from the regional station Sh (see .

Regional station W captures the polling signals as follows

In the microprocessor 46 of the controller 12, according to the program recorded in the ROM 47, the number of the served subscriber station P is first set. Then, the number of attempts to request this station is set, for example, J 5, and a command is sent to transmit the request to the I-th subscriber station. The request through the input / output device 49 passes to the transmitter 10 and, with the aid of the PC antenna 8, is transmitted to the antenna I and the subscriber station receiver 2 and through the interface device 4, the input / output device 31 to the AC controller 5,

In the t-th subscriber station, according to the command recorded in the ROM 43, from the microprocessor 42, a polling signal is sent to the sensor I via a wire connection and to check the status of the electronic key b. The signal about the state of the sensors I and the key b through the input / output device 44 is fed to the controller 5, where it is recorded and, if there is a request from PC P, the signal about the state of the sensors and the AC key is repeatedly received through the chain 7-5-4-3-1-8 -9-II-12 to the controller 12 PC, In the microprocessor 42 of the controller 12, the response is checked from the I-th AC P, If no response is received (with a faulty AC P or its sensors), the number of request attempts to the t-th station decreases on I (Jf-I), Request, similar to the above.

6

repeated with a decrease in the number of attempts by I to 1 0, When

This stops the attempts of the Y-th AS P, If the response to the request is not received (which indicates a malfunction of the i-th AS), the information about the faulty AS is entered into the preliminary data table in PC III - in RAM 48 (chain 5-8 in the operation algorithm FIG. 8).

If an answer is received to the initial request from PC Ш with I-th АС П, the OD received answer is decoded in the microprocessor, its correctness is checked. It is also checked whether there is an alarm message from the 1st speaker, if any, it is entered in the preliminary information table. If there is no alarm message, then the signal received from a technically sound AC P is not entered into the above table. A table of information about the state of the C-th subscriber station P is ready for transmission to the head station 1U at the request signal from the last one (sms “).)

The request signal at the headend 1U is formed as follows

In accordance with the program recorded in the ROM 47 and the algorithm of the controller 21 (see, Fig. T), something happens.

According to the signal from the controller 21 (see Fig. 2), which passed through the interface device 20, the transmitter 19 every 10 seconds sends a request signal through the antenna 18 sequentially to the regional stations Sh. In this case, the frequency signal 150200 MHz from the master oscillator 37 in the transmitter 19 (, 4) it is multiplied in the frequency multiplier 38 by 3 and, in the presence of a signal from the controller 21 at the second input of the modulator 39, passes through it to a power amplifier 40, where it is amplified through a filter 41 with a 3 MHz passband that filters out higher harmonics and is transmitted to the antenna 17 d For transmission to regional station Ш,

{

-f, rf - "x x y

l / yp | YuO

This request signal is received by the antenna 14 of the regional station Ш to the input of the receiver 15 (Fig 3), where it is sequentially converted from analog to digital form. The signal passes through a filter 24 with a bandwidth of 30 dB at a level of 0.5 MHz, is amplified by a high-frequency amplifier 25 with an adjustable gain (dB), mixed in a mixer 27 with a local oscillator signal (not shown), passed through an amplifier 33 heterodyne voltage (d5) and

a band-pass filter 34 with a passband of 0 dB at a level of 0.2 MHz, then passing through a band-pass filter 28 with a passband of dB at a level of 0.2 MHz, the signal from the output of the mixer 27 is fed to an intermediate-frequency amplifier 29 with adjustable gain (dB-g 80 dB, the control range is 60 dB), and then to the amplitude detector 30, gain control in the amplifier 29 is carried out by the AGC circuit from the AGC detector 35 and the DC amplifier 36. The detected signal from the output of the amplitude detector 30 is fed to the DC amplifier 31 and then and a voltage comparator 32, where hardware noise is filtered out by a threshold setpoint value.

The request signal from the head station 1U in digital form through the interface device 13 (input / output device 49 in the controller 12) is supplied to the microprocessor 42 of the controller 12 "According to the ROM program 47, it is then checked whether the request came from the head station 1U, and if so, then A message about the alarm and malfunctioning states of the AC P is transmitted through the chain I2-I3-I6-I4 (FIG. 2) of the PC to the antenna 17, receiver 18, to the controller 1 GS 1U and then through the device 22 to the remote control 23 for decision making by the controller.

it;

AC AC P and so on until the last number AC P.

Then, the alarming and faulty AC Ps are checked from the preliminary table and a message is prepared for transmission to the 1U headend via chain I2-I3-I6-I4 (fisc. I).

Upon receipt of a request from the head station 1U, information about the state of such a subscriber station P from the regional station W is transmitted to the head station 1U via the chain I2-I3-I6-I4-I7-I8 (Fig, d).

Similarly to the foregoing, in the transmitter 16, digital information from the IE controller is converted to analog. In this case, the master oscillator 37 of the transmitter 16 of station III (Fig. 2) generates a high-frequency signal, which is then multiplied by 3 in the frequency multiplier 38 and fed to the modulator 39, which operates in the key mode, passing or not passing the high-frequency signal to the input of the power amplifier 40. from an SC multiplier (depending on whether there is a signal from the controller 12 at the second input of the amplifier) to a power amplifier 40 having a gain factor of 40 dB and an output power of 6 W, Higher harmonics of the signal are filtered out by an output filter 41 in the 3 MHz band about the level - 3 dB with attenuation in the band of 0.5 dB and information about the state of the sensors is transmitted via antenna 14 to the headend, 1U,

This information is received by the antenna 17 of the head station 1U and fed to the input of the receiver 18 (see FIG. 2). In the receiver 18, the received signal is converted from an analog form to a digital one. The received signal passes through a SHEtr 4 bandwidth with a 0 dB passband, then is amplified by a high-frequency amplifier 25, is again filtered in a 30-dB band and fed to a mixer 27, where it is mixed with a signal from a local oscillator (not shown) passed through an amplifier 33 heterodyne voltage / J - / (

Variations and a band-pass filter 34 with a passband of dB. The signal from the output of the mixer 27 through a filter 28 with a passband of 40 d5 is fed to an intermediate frequency amplifier 29 with an AGC circuit connected to it from the detector 35 and a DC amplifier 36 with a gain of Ка420 дО. UPCH 29 has adjustable gain (Kyi + 70-i-dO dB) in the range of 60 dB. From the output of the UPCH 29, the intermediate frequency signal passes to an amplitude detector 30, then through a DC amplifier 31 to a voltage comparator 32 with an adjustable threshold that allows you to filter out hardware noise.

When the transmitter 19 is in operation, the receiver to keep the AGC in working condition is closed by a strobe coming from the controller 21 to the high-frequency amplifier 25.

G of the output of the receiver 16, the received information through the interface device 20 (input / output device 49) is supplied to the controller 21, and then through the interface device 22 (input / output device 49 of the microprocessor 46) to the remote control 23, which is executed on the ES, where it is displayed on the screen in in the form of information on which subscriber station P in which region W triggered a traffic

driving sensor. According to this information, the operator decides to go to the scene of the incident (guarded facility) of the operational group, the arrival of which is recorded at the subscriber station. In the case of an untimely appearance of a task force at a guarded object by a signal transmitted from the parent station, protective equipment U is activated at the guarded object, for example, a gas cylinder explodes to incapacitate violators of the guarded limits.

1 - / i /

Claims (1)

SYSTEM OF SECURITY OF STATIONARY OBJECTS, containing several groups of sensors installed on guarded objects and connected by multi-frequency communication channels to several subscriber stations, connected by multi-frequency communication channels to a number of regional stations connected by multi-frequency communication channels to the head station, characterized in that the subscriber and regional stations are equipped signal processing devices, communication channels are bi-directional, and protective equipment is installed at the guarded objects.