RU2399095C1 - Radiochannel security and fire alarm system - Google Patents

Abstract

FIELD: information technology. ^ SUBSTANCE: system is made in form of a multi-level hierarchical structure at the top of which there is a zero level relay centre, and at the first, second and next levels there is one or more of similar relay centres, each connected to one or more relay centres of the nearest levels. There is a central surveillance panel. Each relay centre includes a micro-cell which contains security, fire and actuating devices made with radiochannel detectors, radiochannel detectors, radiochannel control panels, terminal devices for automatic dialling over a telephone or GSM channels, a reception-control device and a VHF radio transmitter. The reception-control device has a wireless output which is the output of the micro-cell. In each or some relay centres there is also a terminal object device for the notification transmission system whose input is connected to the output of the micro-cell. The system can function as an internally or externally controlled object which, despite jamming signals produced by intruders, provides the control centre and other external remote terminals with the necessary information. ^ EFFECT: high noise immunity and reliability of the system. ^ 6 cl, 5 dwg

Description

The invention relates to systems for sending alarms with wireless transmission of information to a central station, which makes it possible to determine on which site the conditions that caused the appearance of an alarm occurred. Such conditions may include fire, hacking attempts, penetration, and other similar conditions.

Known radio channel alarm system according to patent RU No. 2242383, B60R 25/00, G08B 25/10. It contains an alarm complex installed on the guarded object, containing N detectors, the outputs of which are connected by means of loops to the inputs of the control panel, containing a memory unit and a processor connected to each other, the output of which is connected to the input of the sirens, and the inputs are inputs of the control panel instrument, as well as a radio channel notification transmission system containing a terminal object device, a cellular communication network, and a user terminal in series with each other. In this case, the terminal object device comprises a transmitting module configured to transmit notifications via a cellular communication network to a user subscriber terminal, and a receiving module configured to receive messages via a cellular communication network from a user subscriber terminal. The terminal object device contains a microprocessor with a control keyboard, the input of which is connected to the output of the receiving module, and the output is connected to the input of the transmitting module, and the alarm system includes a programmable module for transmitting notifications via a cellular communication network, connected to the processor of the control panel and with microprocessor of the terminal object device.

The terminal object device and user subscriber terminal may be GSM standard telephones made with the possibility of sending SMS messages and data in GPRS mode.

Depending on the composition of the detectors, the system can solve the tasks of security, fire or security and fire alarms.

The main disadvantages of the system described above are due to the use of wired loops in it, which are associated with:

- the great complexity of installation of equipment and inconvenience caused by the need to violate the interior of the room;

- short time of "life" of the system in case of fire, which is associated with burnout of wires;

- a high probability of false alarms due to various electromagnetic interference to the wiring loops generated, for example, when turning on / off lighting devices and / or household appliances, when the welding machine is operating, or during a thunderstorm.

These shortcomings are eliminated in a professional wireless security and fire alarm and warning system "Sagittarius", which is the closest analogue (prototype) of the present invention. The composition and structure of the full-scale version of the construction of this system are given in the proprietary material “Sagittarius - more objects with lesser forces”, in the manual “Designing security and fire alarm systems based on the in-house radio system SAGITTARIUS”, “Argus Spectrum”, 2007 and other sources. The indicated intraobject radio system (SARS) has a multi-level hierarchical structure, at the top of which there is a zero-level VORS microccell (hereinafter, microcell), and one or more of the same microcells at the first, second and subsequent levels. Each microcell is connected to one or several microcells of the closest levels by radio channels of two-way address information transmission and contains a control and reception device - a security-fire radio expander (RROP) made with the possibility of connecting to a central monitoring station (PTsN), radio-channel security and fire detectors, and executive units also made with a radio channel, local and radio channel control panels, terminal object devices for automatic calling via telephone and GSM channels, also remote indicator blocks, light and sound sirens, a personal computer (PC) and a VHF band transmitter whose input is connected to the radio output of the control panel connected via radio channels to security and fire detectors, executive units, control panels and radio channel sirens , and with the help of wired communication channels - with terminal object devices for automatic calling via telephone and GSM channels, with local control panels, remote indicator units s, a light and audible annunciators and PC, the aforementioned alarm control panel, which is part of the microcell is configured to wirelessly communicate with the alarm control members of the other microcell.

The main advantage of SARS over the aforementioned analogue is the availability of effective intra-site radio channels for communication of the control panel with security and fire detectors, sirens and actuators. As noted above, these radio channels are two-way and targeted, which most fully meets the requirements of the recently entered into force "Technical Regulation on Fire Safety Requirements" and the new standard GOST R 53325-2009 "Fire Engineering. Technical means of fire automatics. General technical requirements. Methods tests. "

BOPC uses dynamic routing technology, that is, a method of transmitting information from one system node to another node in several possible ways. This advantage is manifested primarily when solving the problem of fire alarm, when the fire can destroy individual detectors and communication lines (cables - in wired systems). In this case, the SARS, like no other security and fire system, is able to perform its functions throughout the entire time of the evacuation of people from a burning building. Of course, individual detectors, other elements and components of the system located in rooms with open fire will not work, but all other means will function in full. This suggests a high level of survivability of the system in a fire. At the same time, due to the absence of wired loops, this system is characterized by a significantly lower level of false alarms due to various types of electromagnetic interference compared to traditional wired systems.

However, on the other hand, the hierarchical structure used in the SARS, which determines its high survivability when solving the first main task - fire alarms, also has a drawback that manifests itself when solving the second main task - signaling of penetration into a protected object.

The fact is that attackers trying to penetrate a guarded object, especially if they are experienced criminals, can use a jammer - a jammer of mobile communications, placing it at the location of the zero level microcell (at the top of the "tree"). It is this microcell that collects information from all other microcells and transmits it over the cellular mobile network to the dispatch center. Therefore, by “suppressing” it, an attacker can quite simply block the work of the entire group of microcells (cluster).

Thus, according to the information of the domestic company RadioBug, which is commercially available and is commercially available, the Alligator-15 suppressor with a radiation power of 100 mW and a cost of 10 thousand rubles allows you to completely block cellular communications of GSM-900/1800, 2200 MHz standards in the 100 MHz band and 30 m working zone. Small-sized jammers and longer range are produced. No problem is the suppression of the VHF radio channel. Thus, using fairly simple and affordable technical means, an attacker can actually paralyze the work of the entire SARS.

The present invention is aimed at eliminating the specified disadvantage of the prototype as a security and / or fire alarm system while maintaining all its undeniable advantages, as a fire alarm system.

The proposed technical solution is based on the use of the construction topology and technical means of the aforementioned SARS with the addition to each microcell or to some of them of the terminal object device, which is an integral part of the notification transmission system. The totality of the microcell and the indicated terminal object device of the notification transmission system will hereinafter be called the relay node. The specified notification system can function both inside the controlled object and outside it, providing the necessary information to the control center and other external remote terminals, despite deliberate interference.

Thus, the subject of the present invention is a radio-channel fire alarm system, made in the form of a multi-level hierarchical structure, at the top of which there is a relay node of zero level, and at the first, second and subsequent levels - one or more of the same relay nodes, each of which associated with one or more relay nodes of the closest levels, each relay node includes a microcell, which contains made with the radio channels of the detector security, fire and executive devices, radio channel annunciators, radio channel control panels, terminal devices for automatic calling by telephone and GSM channels, control and reception device connected via radio channels to security and fire detectors, executive devices, radio control panels and annunciators, and with using wired communication channels - with terminal devices for automatic calling via telephone and GSM channels, as well as with blocks of remote indicators, light and sound sirens, PCs and control panels of local monitoring stations, configured to control remote indicator units, light and sound sirens, and having a radio communication output, which is a microcell output, a VHF radio transmitter, the input of which is connected to the radio communication output of the control panel, while the control panel included in this microcell is configured to wirelessly exchange data with the control panels included in other microcells of this class aster, and the control panel, which is part of the zero-level microcell, is also configured to wirelessly exchange data with the control panels, which are part of the zero-level microcells located in other clusters, in this case, to each relay node or some of them include a terminal object device of the notification system, the input of which is connected to the output of the microcell, while the specified terminal object device of the notification system contains to another controller and primary relay module configured to communicate with the radio relay main modules of other relay nodes, control center and the other external terminals, wherein the second input controller is an input terminal of the object device notification transmission system.

Particular features of the invention are as follows.

One or several additional relay modules are implemented in each terminal object device of the notification transmission system, or in some of them, configured to receive radio data from the main relay module of this relay node and transmit data to the main and additional relay modules of other relay nodes.

An additional relay module contains a memory unit and a receiver connected in series, a microprocessor connected to the memory unit, a transmitter and an antenna switch, the output of which is connected to the input of the receiver.

The microprocessor is configured to prohibit the reading of an information message from the memory unit and to establish a different time interval for the prohibition.

The main and additional relay modules are configured to change the protocol of the transmitted signal.

The main and additional relay modules are configured to transmit and receive hopping signals.

The considered radio-channel fire alarm system is one of the possible options for the implementation of the method of transmitting notifications according to the previously obtained patent of the applicant RU No. 2363600, B60R 25/10, G08B 25/10.

The technical result expected from the application of the proposed solution is to provide a sufficiently high noise immunity and system reliability in the conditions of deliberate interference by intruders with wireless communication channels and physical impact on wired communication channels. The essence of the invention is illustrated in figures 1-5.

Figure 1 shows the proposed system in the form of a multi-level hierarchical structure.

Figure 2 presents the structural diagram of the relay node.

Figure 3 presents the structural diagram of the microcell.

Figure 4 presents the structural diagram of the terminal object device of the notification system.

Figure 5 presents the structural diagram of an additional relay module.

Figure 1-5 used the following notation: 1 - relay node; 2 - microcell; 3 - terminal object device of the notification transmission system; 4 - control panel; 5 - security detectors; 6 - fire detectors; 7 - radio channel control panels; 8 - radio channel annunciators; 9 - actuators; 10 - local control panels; 11 - blocks of remote indicators; 12 - light annunciator; 13 - sound annunciator; 14 - terminal device for automatic calling over the telephone channel; 15 - terminal device of an automatic call via GSM channel; 16 - VHF radio transmitter; 17 - PC; 18 - controller; 19 - the main relay module; 20 - additional relay module; 21 - antenna switch; 22 - receiver; 23 - microprocessor; 24 - memory block; 25 - transmitter.

Like the prototype, the proposed radio security fire alarm system is made in the form of a multi-level hierarchical structure (figure 1). At the top of this structure is the relay node 1 of the zero level, and at the first, second and subsequent levels - one or more of the same relay nodes 1, each of which is connected by radio to one or more relay nodes 1 of other levels.

Each relay node 1 (figure 2) includes a micro-cell 2, the output of which is connected to the input of the terminal object device 3 of the notification system.

Microcell 2 (figure 3) contains:

- control panel 4;

- security detectors 5 and fire 6;

- sirens 8 radio channels and actuators 9, made with a radio channel;

- control panels 7 radio channels;

- terminal device 14 of an automatic call via a telephone channel, the input and output of which is connected to the telephone output and the input of the control panel 4;

- terminal device 15 automatic call via GSM channel, the input and output of which are connected, respectively, to the GSM outputs and inputs of the control panel 4;

- a radio transmitter 16 of the VHF range, the input of which is the output of the microcell 2 and is connected to the radio output of the control panel 4.

The control panel 4 is connected using radio channels:

- with security detectors 5 and firemen 6,

- with actuators 9,

- with control panels 7 and sirens 8 radio channels. The control panel 4 is configured to communicate with the monitoring station via wire. At the same time, the outputs-inputs of the following blocks that are part of the monitoring station are connected with the corresponding inputs and outputs of the control panel 4:

- blocks of 11 remote indicators;

- PC 17;

- light annunciator 12;

- sound siren 13;

- 10 local control panels, configured to control blocks 11 of remote indicators, light 12 and sound 13 sirens.

Moreover, the specified control panel 4, which is part of this microcell 2, is configured to wirelessly exchange data with the control panel 4, which are part of other microcells 2 of this cluster. The control panel 4, which is part of the microcell 2 of the zero level, is additionally configured to wirelessly exchange data with the control panels 4, which are part of the microcell 2 of the zero level, located in other clusters.

The terminal object device 3 of the notification transmission system (Fig. 4), as well as the micro-cell 2, is a part of the relay node 1. The specified terminal object device 3 of the notification system contains the controller 18 and the main relay module 19 connected to each other. The second the input of the controller 18 is the input of the terminal object device 3 of the notification system. In this case, the main relay module 19 is made with the possibility of radio data exchange:

- with the main relay modules 19 of both its own and other clusters;

- with a dispatch center;

- with other external terminals.

Alternatively, the terminal object device 3 of the notification system may comprise one or more additional relay modules 20 configured to receive radio data from the main relay module 19 of this relay node 1 and transmit data to the main 19 and additional 20 relay modules of other relay nodes one.

The additional relay module 20 (Fig. 5) comprises a memory unit 24 and serially connected receiver 22, a microprocessor 23, a transmitter 25 and an antenna switch 21, the output of which is connected to the input of the receiver 22, while the memory unit 24 is connected to the microprocessor 23.

The microprocessor 23 may be configured to prohibit the reading of an information message from the memory unit 24 and to establish different durations of the prohibition.

The main 19 and additional 20 relay modules can be configured to change the protocol of the transmitted signal, depending on which relay module — the main 19 or additional 20 — is transmitting an information message.

The main 19 and additional 20 relay modules can be configured to transmit and receive hopping signals.

For the technical implementation of the proposed technical solution, commercial products of the aforementioned Argus-Spectrum company can be used, information about which is given on the website of this company (www.argus-spectr.ru). On this equipment, microcell 2 can be implemented.

The terminal object device 3 of the notification transmission system can be implemented on the receiving-transmitting nodes of the Reef String RS-202 system, commercially available by the applicant company, supplemented with standard elements of the microwave equipment (antenna switch 21) and computer equipment (controller 18, microprocessor 23, block 24 memories).

Therefore, the possibility of practical implementation of the proposed system is not in doubt.

The considered radio-channel fire alarm system works as follows.

The principle of its operation is determined by a multi-level structure of construction similar to the prototype system (Fig. 1). It is a collection of relay nodes 1 connected to each other, arranged in the form of a “tree”, at the top of which there is a relay node 1 of the zero level. In contrast to the prototype system, the system under consideration, along with inter-level communications in the indicated “tree”, has intra-level communications of relay nodes 1 with each other, as well as external communications of a number of relay nodes 1 with relay nodes 1 of other clusters, and with a sufficient range - with a control center and other external terminals.

Each relay node 1 (figure 2) controls a property (for example, a production building or office). Each cluster controls a geographically distributed facility (for example, a cottage village or hospital complex).

The microcell 2 included in the structure of the relay node 1 (Fig. 3) transmits data to the terminal object device 3 of the notification transmission system 3 added to the structure of the relay node 1 (Fig. 4).

The control panel 4, which is part of the microcell 2 (Fig. 3), controls by radio the security detectors 5 attached to it, fire detectors 6, as well as control panels 7 radio channels, sirens 8 radio channels and actuators made with a radio channel 9. By two-way communication is carried out with the local control panels 10 included in the monitoring station, blocks 11 remote indicators, light 12 and sound 13 sirens. Also, by wire, the control and reception device 4 is connected to those included in the same microcell 2 as the control and reception device 4, devices 14 and 15 of the terminal of automatic calls via telephone and GSM channels, respectively. By wire, inside the micro-cell 2, data is also transmitted from the control panel 4 to the VHF radio transmitter 16.

The algorithm of operation of microcell 2 does not differ from the operation of a microcell in the prototype SARS prototype SARS system. For example, if there are signs of fire (due to smoke and / or when the temperature rises), fire detectors 6 are triggered, forming an alarm notification about the fire. Through the radio channel alarm notification is received in the control panel 4 (for example, in the RROP), which generates the appropriate commands and alarm messages.

Pre-programming and control of RROP is carried out using control panels 7 radio channels (PU-R, PUL-R and other similar). In various applications of SARS “Sagittarius” fire alarm sources, the Aurora 6 fire detectors can be sources of alarm: smoke IP 21210-3, thermal IP 10110-A1, combined IP 21210 / 10110-1-A1. Upon receipt of alarming notifications from them, the RROP generates a “Fire” command, through which 8 radio channel sirens, for example, “Siren R”, are triggered. RROP on the radio channel controls the operation of the actuator 9, for example, "IB-R".

The command "Fire" also comes by wire from the control panel 4 to the monitoring station, where it puts the local control panels 10 into alarm mode (for example, PUL, which is included in the delivery set of the control panel 4 of the Accord-512 security firefighter) , and also includes blocks 11 of remote indicators (for example, BVI-64), light 12 and sound 13 sirens. The operating modes of the blocks 11 of the remote indicators, light 12 and sound 13 sirens are set during programming using 10 local control panels, but the monitoring station staff can use these 10 local control panels to change these operating modes if such a change is required by the operational situation. For example, after the appearance of a fire brigade, sound sirens can be turned off. Through the control panels 10, local monitoring station employees can control the operation of the control panel, and hence the signals of microcell 2 as a whole.

PC 17 can be installed in the monitoring station, which allows to display the status of the SARS for the monitoring station staff and to quickly manage its work. By the Fire command, the status of the various sections of the micro-cell 2 is indicated by the blocks 11 of the remote indicators. Each local section of the micro-cell 2 is equivalent to the address of the controlled zone and has a unique identification number. One local section may include from one to thirty-two detectors of various types.

Failure signals - due to the spread of fire - remote indicators included in the blocks 11 remote indicators, and individual elements of the sound 13 and light 12 sirens through the control panel 4 are transmitted to the PC 17, and also received on the local control panels 10. Thus, the monitoring station employees receive timely information on the spread of the fire.

PC 17 software allows monitoring of up to eight SARS on one PC 17 with maintaining a database of events and with the ability to display information on graphic plans. The powers of the monitoring station employees, implemented using the specified PC 17 and local control panels 10, are dependent on the tasks being solved by the monitoring station.

In addition, the control panel 4 of this micro-cell 2 sends “on-air” and relayes “foreign” information to the control-panel 4 of the micro-cell 2 of another level towards the top of the “tree” in which the micro-cell 2 of the zero level is located.

The control panel 4 of the microcell 2 of the zero level acts as the coordinator of all microcells 2. Along with the operations described above to control its microcell 2, it performs:

- processing, logging and display of incoming information;

- exchange of information with PC 17;

- exchange of information with the monitoring station control center and other external terminals.

To transmit information to a dispatch center (for example, information about a fire detected by detectors 6 is to be transmitted to a regional fire protection center), or to other remote terminals, VHF radio channels (i.e., a range from 140 to 170 MHz) can be used and GSM channels. In the latter case, the coverage area of the system is determined by the coverage area provided by the mobile cellular operator. In the presence of roaming, this is almost a global communication scale.

The main factor affecting the reliability of the system is the possibility of deliberate interference by intruders.

When solving the first problem - fire alarm - this situation is unlikely to occur. However, when solving the second problem - signaling about unauthorized entry into the object - this situation is quite possible. Particularly effective attackers can use the jammer if they have information about the location of the control panel 4 microcells 2 of zero level. In this case, by acting on the specified microcell 2 with the help of the above interference maker, attackers can almost completely block the operation of not only this microcell 2, but the entire cluster.

In order to avoid this, the aforementioned intra-level (horizontal) communications are introduced into the proposed system, which are formed due to the introduction of the terminal object device 3 of the notification transmission system into each relay node 1 (or at least some relay nodes 1) (Fig. 4). The relay node 1 with the terminal object device 3 of the notification system introduced into it is a block whose communication with the "outside world" is no longer from one point of the cluster - microcell 2, which is part of the relay node 1 of the zero level, but from several or of all the relay nodes 1 of the cluster containing the aforementioned terminal object device 3 of the notification system.

Accordingly, the algorithm of the system is also being built. When an attacker attempts to penetrate the object protected by the system, the security detectors 5 that are part of the microcell 2 are triggered (Fig. 3). The said security detectors 5 generate alarm notifications, which are transmitted by radio to the control panel 4. Having received the indicated notices, the control panel 4 generates radio commands by means of which radio channel sirens 8 are activated (for example, a siren and a strobe light) and actuators 9, used for radio control of various automation devices. Further, the control panel 4 supplements the alarm notification received from the security detectors 5 with the corresponding fields of service information and generates an information message, of which the initial alarm notification is a part. At the same time, the codes of the identification signs of the relay node 1 and the security detectors 5 included in its structure, which in the simplest case are determined by the numbers of the security detectors 5 from which the initial alarm notification is stored, are also included in the corresponding fields of the indicated information message .

The information message thus generated from the radio output of the control panel 4 is transmitted to the VHF radio transmitter and to the terminal object device 3 of the notification system to the first input of the controller 18. From the GSM output of the control panel 4, this information message is sent to the device input 15 terminal automatic call via the GSM channel, and from the telephone output to the input of the device 14 terminal automatic call via the telephone channel.

Which of the channels will be used to broadcast the information message is determined by the interference situation in the area of the controlled object and the operability of the telephone communication channel.

The two-sided nature of the radio channels makes it easy to detect a loss of communication due to the influence of intentional interference on them. As for the telephone channel, it can be quite simply detected visually and disabled. It is quite simple that the connection of microcell 2 with the monitoring station can also be interrupted, since this connection is carried out by wire. In such cases, the only way to transmit information messages to the dispatch center or to other external terminals is to use the radio channel of the terminal object device 3 of the notification system.

After receiving an information message from the radio output of the control panel 4, the controller 18, which is part of the terminal object device 3 of the notification system (Fig. 4), transmits it to the input of the main relay module 19. In the main relay module 19, the incoming information message is transferred to high-frequency carrier, is converted to the format necessary for transmission on the main relay channel, and is broadcast.

The role of repeaters of this signal is played by relay nodes 1, located at other real estate objects, which may be located both inside this cluster and in other clusters. The more such real estate objects will be equipped with relay nodes 1 equipped with terminal object devices 3 of the notification transmission system, the higher will be the density of the relay network formed on their basis and, accordingly, the more reliable will be the exchange of data between the protected real estate object and external terminals in a complex interference setting. After the information message emitted by the main relay module 19 is received by the main relay module 19 in another relay node 1, this information message is transmitted to the controller 18 of the terminal object device 3 of the notification system. The controller 18 enters the identification fields of its relay node 1 into the corresponding fields of the relayed information message as a sign of relaying and carries out further relaying.

In this way, through the chain of relay nodes 1, an alarming information message reaches the dispatch center or another external terminal for subsequent analysis and response.

In the coverage area of the main relay module 19, installed on the property, which has been subjected to unauthorized influence, several relay nodes 1 can simultaneously be located.

Reliability of communication between an object and a dispatch center and other external terminals can be increased by covert installation of a notification system in terminal object devices 3, in addition to the main relay module 19, of one or more additional relay modules 20.

In this case, simultaneously with the transmission of information messages from one relay node 1 to other relay nodes 1, information messages emitted by the main relay module 19, additional relay modules 20, covertly installed on the guarded real estate are received. This allows you to maintain communication even in the event of an attacker breaking down the main relay module 19. This is achieved as follows.

In each additional relay module 20 (Fig. 5), information messages through the antenna switch 21 and receiver 22 are received by the microprocessor 23. The microprocessor 23 verifies the compliance of the information message with the criteria established for this object and sends information messages to the memory unit 24.

Upon receipt of the next informational message from the main relay module 19, the contents of the memory unit 24 are updated in each of the additional relay modules 20.

It should be noted that the main relay module 19 can generate information messages for additional relay modules 20 in a special auxiliary protocol, using the main protocol for transmitting information messages to be relayed to other relay nodes 1.

The use of one common protocol, of course, greatly simplifies the operation of the main relay module 19, however, this reduces the operating time of the additional relay modules 20 without changing the autonomous power source. Indeed, taking into account the possibility of receiving an informational message at a direct line of sight, the transmission time of the informational message to other relay nodes 1 should last several seconds, and tens of milliseconds are enough for reliable reception of the informational message inside this relay node 1. The reduction in the necessary time for receiving a signal is due to a decrease in the number of bits in the information message: for additional relay modules 20, it is sufficient for the main relay modules 19 to transmit only a sign by which "their" signal will be determined. When this identification signs are entered in advance in block 24 of the memory of the additional relay module 20.

Consider a typical numerical example. Suppose, for example, the main relay module 19 within five seconds transmits twice the main message for the main relay modules 19 of the other relay nodes 1. Then, let the main relay module 19 switch to a special auxiliary protocol and transmit fifty times the same meaning of the information message for additional relay modules 20.

The additional relay modules 20, in the absence of signals from the main relay module 19, remain disconnected almost all the time and are turned on for reception for one millisecond twice a second. If during this millisecond the controller 18 determines the presence of external radiation with parameters admissible by a special auxiliary protocol, then the reception mode continues. The reception mode ends either immediately after determining that the signal source is the main relay module 19 of the other relay node 1, or after the reception of the information message of "its" main relay module 19.

If the attackers managed to find and disable the main relay module 19, then the reception in each of the additional relay modules 20 of information messages corresponding to the criteria established for this relay node 1 becomes impossible. After the time interval specified for each of the additional relay modules 20, after the next update of the contents of the memory unit 24, the microprocessor 23 of the corresponding additional relay module 20 requests the information message stored in it and sends it to the input of the transmitter 25. In the transmitter 25, this information message is transferred to the carrier frequencies used in the main relay module 19, and through the antenna switch 21 is broadcast. In this case, it is possible to use the same two protocols as when transmitting the information message by the main relay module 19.

The emitted signal of the additional relay module 20 containing the information message is received by the other relay nodes 1. Reception is carried out by the main relay module 19, which is constantly in the activated state. The message is supplemented by the relay features in the controller 18 and again enters the main relay module 19 for broadcast. In this case, the connection must be stable, since there is no jammer in this place. The information message relayed according to the chain described above is received at the dispatch center or in another external terminal, where it is analyzed and response commands are generated.

To ensure the secrecy of the operation of additional relay modules 20 and to ensure economical charge consumption of their batteries, a ban on the transmission of information messages in each of the additional relay modules 20, except for one for which a minimum time interval is set between the next update of the contents of the memory unit 24 and the formation of the request microprocessor 23. Such a ban can be implemented by receiving an informational message from an additional relay Module 20 other additional relay modules 20 of the same property and update them in 24 memory content block. As indicated above, after such an update, a delay countdown begins, at the end of which the microprocessor 23 of the corresponding additional relay module 20 requests the information message stored in it in the memory unit 24. Thus, if attackers detect (for example, by the presence of signals) and destroy the additional relay module 20, which generates information messages, then the formation of information messages begins with another additional relay module 20, which has the next delay value.

In the manner described above, the proposed technology allows the transmission of information messages about unauthorized exposure to a protected real estate object even when the device 15 for terminating an automatic call via GSM channel and the VHF radio transmitter 16 are suppressed by interference, communication with the monitoring station is interrupted, and telephone channels and the individual nodes of the terminal object device 3 of the notification system are physically disabled. An even higher degree of noise immunity can be achieved through the use of the so-called hopping signal (described, for example, in patents RU No. 2278415, G08В 25/10, G08C 29/12, Н04В 1/713 in the relay chain described above) , RU No. 2265250, G08В 25/08, G08C 15/00).

Thus, the technical solution described above allows one to obtain the expected technical result, which consists in ensuring sufficient noise immunity and reliability of the radio-channel fire and security alarm system in the conditions of the use of intentional interference by the attackers to the wireless communication channels and physical impact on the nodes of the object equipment.

Claims (6)

1. The radio-channel fire alarm system, made in the form of a multi-level hierarchical structure, at the top of which there is a relay node of the zero level, and at the first, second and subsequent levels - one or more of the same relay nodes, each of which is associated with one or more by relay nodes of the nearest levels, each relay node includes a microcell, which contains security, fire and executive devices, warning devices made with radio channels radio channel bodies, radio channel control panels, terminal devices for automatic calling by telephone and GSM channels, a control panel connected via radio channels with security and fire detectors, executive devices, radio control panels and sirens, and with wired communication channels, with devices terminal automatic calls via telephone and GSM channels, as well as with blocks of remote indicators, light and sound sirens, a personal computer and remote controls control boards of the local central monitoring console, configured to control remote indicator units, light and sound sirens, and having a radio communication output, which is a microcell output, a VHF radio transmitter, the input of which is connected to the radio communication output of the control panel, while the control panel , which is part of this microcell, is configured to wirelessly exchange data with control panels included in other microcells of this class erased, and the control panel, which is part of the zero-level microcells, is also configured to wirelessly exchange data with the control panels, which are part of the zero-level microcells, located in other clusters, characterized in that in each relay node or some of them include a terminal object device of the notification system, the input of which is connected to the output of the microcell, while the specified terminal object device of the notification system contains associated with each other and the main relay controller module configured to communicate with the radio relay main modules of other relay nodes, control center and the other external terminals, wherein the second input controller is an input terminal of the object device notification transmission system. 2. The system according to claim 1, characterized in that in each terminal object device of the notification transmission system or some of them one or more additional relay modules are introduced, configured to receive radio data from the main relay module of this relay node and transmit data to main and additional relay modules of other relay nodes. 3. The system according to claim 2, characterized in that the additional relay module comprises a memory unit and a receiver connected in series, a microprocessor associated with the memory unit, a transmitter and an antenna switch, the output of which is connected to the input of the receiver. 4. The system according to claim 3, characterized in that the microprocessor is configured to prohibit the reading of an information message from the memory unit and establish a different duration of the prohibition. 5. The system according to claim 2, characterized in that the primary and secondary relay modules are configured to change the protocol of the transmitted signal. 6. The system according to claim 2, characterized in that the primary and secondary relay modules are configured to transmit and receive hopping signals.

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