WO2008072991A1

WO2008072991A1 - Data acquisition and processing system for the integrated safety system of an object

Info

Publication number: WO2008072991A1
Application number: PCT/RU2006/000662
Authority: WO
Inventors: Alexander Viktorovich Shadrin
Original assignee: Federalnoe Gosudarstvennoe Unitarnoe Predpriyatie 'rossysky Federalny Yaderny Tsentr-Vserossysky Nauchno-Issledovatelsky Institut Tekhnicheskoi Fiziki Imeni Akademika E.I. Zababakhina'
Priority date: 2006-12-11
Filing date: 2006-12-11
Publication date: 2008-06-19

Abstract

The inventive data acquisition and processing system for the integrated safety system of an object comprises control computers, computers for automated work stations and servers which are interconnected by the Earthnet computer network. The control computers are provided with multiport devices, the similar ports of which are connected by pairs, through interface converters, to transceiver groups which are connected to said interface converters. The transceivers are connected to peripheral devices by communication lines. The Manchester II code is used for data exchange with the peripheral devices. Single failures of the communication computers, multiport devices, interface converters and of the components the computer network do not disturb the operation of the system. The single failures of the transceivers or the communication lines interrupt the communication with one peripheral device, only. The highly reliable data acquisition and processing system is mainly used in systems consisting of a central station and remote peripheral terminals, including security systems requiring the high reliability of communications channels.

Description

Information collection and processing system for the integrated security system of the facility.

Technical field

The invention relates to information collection and processing systems for integrated facility security systems.

State of the art

An important part of the security system of large objects is a system for collecting and processing information. In general, it contains servers, workstation computers, control computers, and various peripheral devices. Peripheral devices include, for example, access controllers and burglar alarms that directly interact with detection tools, identification devices, and actuators.

Information exchange between computers included in the system is carried out through the Ethernet network. Peripheral devices, as a rule, are connected to control computers via highways with RS-485 interface. A limited number of peripheral devices can be connected to one trunk, usually no more than 32. If the computer has a sufficient number of RS-485 ports, then the trunk can be connected directly to these ports. If there are no such ports or they are not enough - the computer can be equipped with a multi-port device with the required number of ports of the desired type. A multiport device can be connected to a computer through a serial port, through a system bus, or through an Ethernet network. On large objects, the number of peripheral devices can reach several hundreds and even thousands, therefore multiport devices are used.

An important characteristic of a system for collecting and processing information intended for a security system is the ability to perform its functions in case of failures of system components, including communication lines with peripheral devices, i.e. its survivability. Survivability - the property of an object to maintain limited operability in the presence of defects or damage of a certain type, as well as in the event of failure of some components. (GOST 27.002-89. Reliability in technology. Basic concepts. Terms and definitions.) A well-known way to increase survivability is reservation. There are such systems as the AC-CaД32 information collection and processing system manufactured by ALGONT JSC, Kaluga, Russia. http://www.algont.ru .; or a subsystem for collecting and processing information of an integrated security system manufactured by the EVS company, St. Petersburg, Russia, www.еus.ru. In such systems, to increase the reliability of the system, redundancy of part of the components is used. Typically, these are the servers and computers of the workstation connected to the Ethernet network. Typical schemes based on standard equipment are used to build an Ethernet fault-tolerant network.

The disadvantages of these systems can be considered that in the EMU system, peripheral controllers (up to 32 pcs.) Are connected to the trunk with an RS-485 interface. Faults such as a fault in the interface converter or a short circuit in the communication line result in loss of communication with all peripheral controllers connected to the trunk.

In the ACCaD32 system, peripheral controllers are also connected to highways with the RS-485 interface. In addition, the controllers that control the lines are also connected to the control computer by the RS-485 line. A malfunction in this trunk results in loss of communication with all peripheral controllers.

Closest to the proposed system is the “Kedp” information collection and processing system, “Daedal” company, Dubna, Moscow Region, Russia, http: //www.dedal.ra. It is selected as a prototype. The system contains servers, workstation computers, control computers (trunk controllers) equipped with multi-port devices with 4 RS-485 ports, and peripheral controllers. Servers, workstation computers and control computers are connected by the Ethernet network. Servers and computers of workstations are reserved. The control computers are connected via multiport devices to peripheral controllers via RS-485 lines. Up to 32 peripheral controllers can be connected to one trunk. In the event of a server or computer failure, the backup starts working instead.

The disadvantage of the prototype is its low survivability, namely: if the control computer or multiport device fails, then communication with all 124 peripheral controllers is broken. Port failure, open or short circuit of the trunk line connected to this port, as well as some malfunctioning the correctness of the peripheral devices connected to the main communication line leads to the loss from observation of all peripheral controllers connected to this communication line. If these are the controllers that provide the security alarm, you will have to compensate for the loss of surveillance from the central console of the protected objects with the help of security personnel. Compensation consists in setting up posts at objects not observed from the central console. But if the connection is lost with a large number of controllers, then the number of security personnel may simply not be enough to organize the required number of posts. This is not acceptable for a security system. In other words, the criticality of the above failures and types of malfunctions is too high. In accordance with GOST 27.002-89 “Reliability in technology. Basic concepts. Terms and definitions ”, criticality of failure - a set of features characterizing the consequences of failure.

Disclosure of the invention. The objective of the present invention is to provide a system for collecting and processing information for an integrated security system of an object with increased survivability and reduced criticality of the consequences of failures, while minimizing redundancy.

The technical result of the invention lies in the fact that a single failure of a server, a computer of a workstation, a computer network component, a control computer, a multiport device, or an interface converter does not affect the operation of the system at all. In case of failure of the transceiver, or a break in the communication line with a peripheral device, communication with only one peripheral device is lost. To obtain the specified technical result in the information collection and processing system for the integrated security system of the facility, which contains servers, workstation computers, control computers (backbone controllers) connected by an Ethernet Ethernet fault-tolerant network, as well as multiport devices and peripheral controllers, each control computer being connected with its multiport device, according to the invention, for each control computer and multiport connected to it devices, a backup control computer and a multi-port device connected to it were introduced; an interface converter, interface converters, connected to the same ports of the main and backup multiport devices are connected to a group of transceivers, and each transceiver is connected by a communication line to a peripheral controller.

This implementation of the scheme allows achieving the claimed technical result and, with a minimum of redundancy, to obtain maximum system resilience and minimal criticality of the consequences of failures.

The transceivers can be made with analog signal adders of the primary and backup interface converters, and the inputs of the interface converter with analog signal adders from a group of transceivers.

As an interface converter, an RS-232 interface signal converter can be used into a bipolar phase-manipulated code with a zero DC component.

Decoupling capacitors can be introduced at the inputs and outputs of the transceivers and at the inputs of the interface converters to maintain the operability of the interface converters and transceivers in the event of malfunctions leading to the appearance of constant potentials at the outputs.

Transceivers can have transformer galvanic isolation with a communication line to increase noise immunity. In one embodiment, in transceivers, the output winding of the galvanic isolation transformer with the communication line is taped from the middle to provide power to peripheral terminals via the communication line.

A two-terminal device can be inserted into the transceiver to coordinate with the communication line in the required frequency range.

Suppression cascades at the inputs of receivers of transmitted signals can be introduced into transceivers to ensure duplex operation on a single two-wire communication line.

Cascades of the amplitude-frequency correction of the received signal can be introduced into the transceivers to increase the maximum allowable length of the communication line and the speed of information transfer.

The control computer software provides information on their monitors and control peripheral devices from them you in case of malfunctions that disrupt the operation of computers of the operator’s workstations.

Brief Description of the Drawings

The invention is illustrated by the drawing shown in FIG. 1, 2, where: Fig. 1 shows a structural diagram of a system for collecting and processing information for an integrated security system of an object; figure 2 presents the connection diagram of the pairs of interface converters with a group of transceivers.

Embodiments of the invention The structure of a system for collecting and processing information for an integrated security system of an object is shown in FIG. 1. The system contains redundant control computers 1, redundant servers 2 and redundant computers of workstations 3, connected by a fault-tolerant Ethernet network 4. The structure of the computer network is constructed according to one of the standard schemes that ensure the exchange of information between computers 1 during a single failure of any component of network equipment.

The control computers 1 in the amount of one or several pairs are equipped with multi-port devices 5. In each such pair, one computer 1 can be considered as the main one, and the other as the backup. Since the primary and backup computers are completely identical, in FIG. 1 they are indicated by the same numbers. The same is true for multiport devices 5. An RS-232 / Interface-6 interface converter 6 is connected to each port of the multiport device 5. Each pair of interface b converters connected to the ports of the multiport device 5 with the same numbers is connected to a group 7 of transceivers 8 having two inputs and two outputs for communication with interface transformers 6. Each transceiver 8 is connected by a communication line 9 to a peripheral device 10. Control pairs computers 1 with multiport devices 5 connected to them, interface converters 6 and transceivers 8 form the control segments 11 of the system, providing information exchange with peripheral devices 10 and peripheral device management 10.

The connection diagram of the pairs of transducers of the interface 6 with the group 7 of transceivers 8 is shown in FIG. 2. The interface converter 6 consists of dera 12 and decoder 13. If the outputs of the encoders 12 or the inputs of the decoders 13 were interconnected, then malfunctions in one device 8 from group 7, leading to the appearance of a constant potential in the common circuit, would not allow other devices 8 from that same group 7. Due to the fact that the transceivers 8 have two inputs InI, In2 and two outputs Outl, Jut2, there is no such combination. This increases survivability and reduces the criticality of the consequences of failures of the information collection and processing system for the integrated security system of the facility.

The input stage of the transceiver 8 on the operational amplifier 14, covered by parallel negative feedback through a resistor 15, is an analog adder, to which signals are supplied from the inputs through resistors 16 and 17. Resistors 16 and 17 exclude the possibility of shunting the output circuit of a functioning encoder 12 by the output circuit faulty encoder 12. Using a Manchester-P code or another code with a zero constant component for communication with peripheral devices 10 allows you to enter a decoupling capacitor 18, which provides maintaining the operability of the transceiver 8 in case of malfunctions of the encoder 12, leading to the appearance of a constant potential at its output. To reduce the likelihood of a constant potential at the output of the encoder 12, a capacitor 19 is introduced. The input stage of the interface converter 6, to which the signals from the transceivers 8 are supplied, is also an analog adder.

So that the malfunctions in the transceiver 8, as well as at the input of the decoder 13 (short circuit or the appearance of a constant potential), do not interfere with the operation of other transceivers and another decoder 13, resistors 20, 21 and capacitors 22 and 23 are introduced.

The transceiver 8 may contain (see Fig. 2):

• transformer 24 for galvanic isolation with communication line 9;

• two-terminal 25, ensuring coordination with the communication line 9 in the required frequency range; • suppression stage 26 at the input of the receiver of signals transmitted to communication line 9 (to ensure communication with the peripheral device in duplex mode); • cascade of amplitude-frequency correction 27 to restore the amplitude and shape of the received signal to increase the length of the communication line and the speed of information transfer.

An additional useful feature may be the ability to supply power to peripheral devices 10 via communication line 9. For this purpose, transformer 24 can be made to tap from the middle of the winding connected to communication line 9, through which power is supplied to peripheral devices 10.

The system works as follows. In each control segment 11, one of the computers 1 is active and provides the exchange of information with

10 peripheral devices 10 connected to this segment 11, and the second computer 1 is a backup. In case of failure of the interface converter 6 connected to the i-th port of the multiport device 5 or this port itself, information exchange with a group of peripheral devices 10 connected to the i-th port can be carried out through the second control computer 1 of this segment

15 11, the i-th port of the multiport device 5 connected to it and the corresponding interface converter 6. In the event of a complete failure of the 1st control computer 1, or the multiport device 5, a second control computer 1 of segment 11 with its multi-port will be used to communicate with peripheral devices 10 device 5 and interface converters 6. Disruption of communication with 0 peripheral device 10 will occur only if the transceiver 8 or communication line 9 fails. But such single malfunctions lead to loss of communication only with These peripheral 10 that can be considered acceptable, and rather low severity of consequences of failure. The use in the system of two servers 2 and several computers of automated workstations 5 of places 3, as well as the fault-tolerant Ethernet 4 network, which provides communication between all the computers in the system for any single failure of network components 4, makes it possible to guarantee the performance of all system functions in the event of failure of any computer 1 - 3. The application software is designed so that any of computers 1–3 can be used as any automated workstation 3.

The computer software can be built in such a way that, when all computers 1 - 3 are in good working order, the control computers 1 serve only for the exchange of information with peripheral devices 10, and the computers of workstations 3 perform the functions of displaying information mation and management. If one of the computers 3 displaying information fails, its functions can be performed by other computers 3, as well as control computers 1, while continuing to exchange information with peripheral devices 10. Industrial applicability

The invention will find application in systems for collecting and processing information of integrated systems of physical protection of objects. Tests of the layout of the system for collecting and processing information built in accordance with the invention, confirmed its performance.

Claims

Claim

1. A system for collecting and processing information for an integrated security system of an object, containing servers, computers, workstations, control computers connected by a fault-tolerant Ethernet network, as well as multiport devices and peripheral controllers, each control computer being connected to its multiport device, characterized in that for each control computer and the multiport device connected to it, a backup control computer and the multiport associated with it are introduced device, an interface converter is connected to each port of a multiport device, interface converters connected to the same ports of the main and backup multiport devices are connected to a group of transceivers, and each transceiver is connected by a communication line to a peripheral controller.

2. The system according to claim 1, characterized in that the transceivers are made with analog signal adders of the primary and backup interface converters, and the inputs of the interface converter are made with analog signal adders from a group of transceivers.

3. The system according to claims 1 or 2, characterized in that the converter of signals of the RS-232 interface to a bipolar phase-shifted code with zero DC component is used as an interface converter.

4. The system according to claim 3, characterized in that isolation capacitors are introduced at the inputs and outputs of the transceivers and at the inputs of the interface converters.

5. The system according to claim 4, characterized in that the transceivers have a transformer galvanic isolation with a communication line.

6. The system according to claim 5, characterized in that in the transceivers the output winding of the galvanic isolation transformer with the communication line is made with a tap from the middle.

7. The system according to claim 1, characterized in that a two-terminal matching with a communication line in the required frequency range is introduced into the transceiver.

8. The system according to claim 1, characterized in that suppression cascades at the inputs of the receivers of the transmitted signals are introduced into the transceivers.

9. The system according to claim 1, characterized in that cascades of the amplitude-frequency correction of the received signal are introduced into the transceivers.