CN115359644B - Remote control system based on DCS operation station - Google Patents
Remote control system based on DCS operation station Download PDFInfo
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- CN115359644B CN115359644B CN202210983499.7A CN202210983499A CN115359644B CN 115359644 B CN115359644 B CN 115359644B CN 202210983499 A CN202210983499 A CN 202210983499A CN 115359644 B CN115359644 B CN 115359644B
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
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- H04L67/125—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/08—Access security
- H04W12/088—Access security using filters or firewalls
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C2201/00—Transmission systems of control signals via wireless link
- G08C2201/40—Remote control systems using repeaters, converters, gateways
- G08C2201/41—Remote control of gateways
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C2201/00—Transmission systems of control signals via wireless link
- G08C2201/40—Remote control systems using repeaters, converters, gateways
- G08C2201/42—Transmitting or receiving remote control signals via a network
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The application discloses a remote control system based on a DCS operation station, and relates to the technical field of industrial control. The system comprises remote operation equipment, wireless communication equipment, an internet, firewall equipment and a distributed control system DCS operation station, wherein the wireless communication equipment comprises an interface board, a network change-over switch, a 4G/5G router, a modulation and demodulation module, a satellite antenna and a control module, the control module can enable the remote operation equipment to be accessed into the internet in real time through switching control according to the detection result of working signals of the 4G/5G router and the satellite antenna, and the DCS operation station is also accessed into the internet through the firewall equipment, so that the remote operation equipment can be connected by utilizing the internet in a communication mode, and even if no mobile signal exists, wireless transmission between an industrial control subsystem and the DCS system can be automatically realized through satellite communication, and the real-time performance of data communication is ensured.
Description
Technical Field
The application belongs to the technical field of industrial control, and particularly relates to a remote control system based on a DCS operation station.
Background
Industrial Control (Factory Control) mainly refers to the use of computer technology, microelectronics technology and electrical means to make the production and manufacturing processes of factories more automated, efficient and accurate, and controllable and visual. In the existing industrial control system, the factory decentralized control system (Distributed Control System, DCS) generally needs to establish a link with an industrial control subsystem (such as an operating system based on a programmable logic controller PLC), for example, subsystems such as a medium water pump and the like need to perform real-time data communication with the factory DCS system, but at present, all modes for establishing real-time data communication adopt a wired transmission mode, for example, the existing patent with publication number of CN209469566U and entitled "a plurality of water pump control systems based on DCS", wherein, all the water pumps and the main control cabinets adopt a wired connection mode, and only can adapt to a short-distance system link scene, and cannot meet new remote control requirements.
Aiming at the remote control requirement, the wireless transmission purpose of the industrial control subsystem and the DCS system is realized based on the ground mobile communication system at present, but the ground mobile communication system still has a certain limitation, namely in some areas, the macro base station cannot be built in a short time due to the severe environment, and the problems of huge construction cost and the like exist, so that the areas are areas without signal coverage areas or areas without local telecommunication operators for providing a ground mobile communication network. In geographical areas such as oceans, mountainous areas or deserts, ground mobile communication networks hardly exist due to the difficulty in installing macro base stations; for example, in remote villages, remote residential areas, ecological areas or islands, etc., no local telecommunication operators provide ground mobile communication networks due to huge network construction costs; in areas where natural disasters such as sudden earthquakes occur, for example, the macro base station may be damaged, so that temporary no moving signals are generated. Therefore, only by the ground mobile communication system, there is a risk that data communication cannot be performed/data communication cannot be temporarily interrupted due to no mobile signal, so that the real-time performance of the data communication between the industrial control subsystem and the DCS system cannot be completely ensured.
Therefore, considering the characteristic that satellite communication has a wide coverage area, how to provide a remote control scheme based on the satellite communication technology and the 4G/5G communication technology and realizing wireless transmission of an industrial control subsystem and a DCS system, so that the real-time performance of data communication between the industrial control subsystem and the DCS system can be ensured is a subject to be researched urgently by those skilled in the art.
Disclosure of Invention
The application aims to provide a remote control system based on a DCS operation station, which is used for solving the problem that the real-time data communication between an industrial control subsystem and a DCS system cannot be completely ensured because the risk that the data communication cannot be carried out/temporarily interrupted due to no mobile signal exists in the existing remote control scheme based on a ground mobile communication system.
In order to achieve the above purpose, the present application adopts the following technical scheme:
in a first aspect, a remote control system based on a DCS operation station is provided, including a remote operation device, a wireless communication device, an internet, a firewall device and a distributed control system DCS operation station, where the wireless communication device includes an interface board, a network switch, a 4G/5G router, a modem module, a satellite antenna and a control module, where the interface board is provided with a first control interface, a second control interface, a first network interface and a second network interface, and the network switch has a controlled interface, a third network interface, a satellite communication network interface and a 4G/5G network interface;
the remote operation equipment is in communication connection with the first network interface, the first network interface is in communication connection with the second network interface, the second network interface is in communication connection with the third network interface, the satellite communication network interface is in communication connection with the modem module, the 4G/5G network interface is in communication connection with the 4G/5G router, the modem module is in communication connection with the satellite antenna through a signal receiving and transmitting link, the control module is in communication connection with the 4G/5G router through the first control interface, the control module is in communication connection with the controlled interface through the second control interface, and the control module is also in communication connection with the modem module and the satellite antenna respectively;
the network switch is used for alternatively switching on the third network interface and the satellite communication network interface or the third network interface and the 4G/5G network interface according to the control signal input from the controlled interface;
the control module is used for controlling the network switch to execute alternative switching on action in real time based on a preset network priority rule according to the detection result of the working signals of the 4G/5G router and the satellite antenna, so that the remote operation equipment can access the Internet through the satellite antenna or the 4G/5G router;
the DCS operation station accesses the Internet through the firewall equipment so as to utilize the Internet to be in communication connection with the remote operation equipment.
Based on the above summary, a remote control scheme integrating satellite communication technology and 4G/5G communication technology and realizing wireless transmission between an industrial control subsystem and a DCS system is provided, that is, the remote control scheme includes a remote operation device, a wireless communication device, an internet, a firewall device and a distributed control system DCS operation station, where the wireless communication device includes an interface board, a network switch, a 4G/5G router, a modem module, a satellite antenna and a control module, and the control module can control the network switch to execute a switching-on operation in real time based on a preset network priority rule, so that the remote operation device can access the internet through the satellite antenna or the 4G/5G router, and the DCS operation station can access the internet through the DCS device, so that the remote operation device can be connected with the DCS network by using the communication of the internet, and even if no mobile signal occurs, the industrial control subsystem can be realized in real time, and the industrial control subsystem can be realized conveniently, and the industrial control subsystem can be popularized in real time.
In one possible design, the control module is further configured to, when the remote operation device accesses the internet through the satellite antenna or the 4G/5G router, obtain weather forecast data of the area in a next unit period from the internet, input the weather forecast data into a prediction model based on a neural network and trained, output a prediction result indicating whether the next unit period is a mobile signal unstable period, and finally, when the prediction result indicates that the next unit period is a mobile signal unstable period, control the network switch to switch on the third network interface and the satellite communication network interface all the time in the next unit period, so that the remote operation device can access the internet through the modem module, the satellite antenna and a satellite communication carrier network stably in sequence.
In one possible design, when the remote operation device is an operation device for performing external communication based on the Modbus RTU protocol, the remote control system further includes a protocol conversion device for performing mutual conversion between the Modbus RTU protocol and the Modbus TCP/IP protocol;
the protocol conversion equipment is in communication connection with the remote operation equipment through an RS485 serial interface, and is also in communication connection with the first network interface through an RJ45 network cable interface.
In one possible design, according to the detection result of the working signals of the 4G/5G router and the satellite antenna in real time, based on a preset network priority rule, the method for controlling the network switch to execute the alternative switching on action in real time includes:
judging whether 4G/5G network signals exist or not in real time according to the working information of the on-line status lamp from the 4G/5G router and collected through the first control interface;
if the network switching switch has the 4G/5G network signal, the network switching switch is controlled to execute the switching action for conducting the third network interface and the 4G/5G network interface so that the remote operation equipment can access the Internet through the 4G/5G router, otherwise, the network switching switch is controlled to execute the switching action for conducting the third network interface and the satellite communication network interface so that the remote operation equipment can access the Internet through the modem module, the satellite antenna and the satellite communication carrier network in sequence.
In one possible design, determining whether there is a 4G/5G network signal based on the presence lamp operating information from the 4G/5G router and collected through the first control interface in real time includes:
receiving online status lamp working information from the 4G/5G router in real time and collected through the first control interface;
when the presence lamp operating information indicates that the presence lamp of the 4G/5G router is on, a 4G/5G network signal is judged, and when the presence lamp operating information indicates that the presence lamp is off, a 4G/5G network signal is judged to be absent.
In one possible design, controlling the network switch to perform a switching action for switching on the third network interface and the satellite communication network interface includes:
starting a timer, and sending a starting instruction to the modulation and demodulation module to enable the modulation and demodulation module to perform satellite finding by transmitting an L-band signal to the satellite antenna;
if the satellite signal suitable for satellite communication is found through the beacon/carrier detection mode before the timing of the timer reaches the preset duration threshold, a switching instruction is sent to the network switching switch through the second control interface, so that the network switching switch executes switching action for conducting the third network interface and the satellite communication network interface, and otherwise, a communication failure message is fed back to the remote operation equipment.
In one possible design, the modem module employs a modem model IQ200 series.
In one possible design, the radio frequency components in the satellite antenna employ an up-lock converter or a low noise module converter.
In one possible design, the control module employs an integrated circuit chip model STM32F407 and its peripheral circuitry.
In one possible design, the firewall device employs an industrial-grade multiport security router of the type EDR-810 family that integrates firewall/NAT/VPN and two-layer network management switching functions.
In one possible design, the DCS operator station uses the NT6000V4 system and configures the Modbus driver by its upper level networking software KVIEW/RT V4.0.
The beneficial effect of above-mentioned scheme:
(1) The application creatively provides a remote control scheme which integrates a satellite communication technology and a 4G/5G communication technology and realizes wireless transmission of an industrial control subsystem and a DCS system, namely, the remote control scheme comprises remote operation equipment, wireless communication equipment, an internet, firewall equipment and a distributed control system DCS operation station, wherein the wireless communication equipment comprises an interface board, a network switching switch, a 4G/5G router, a modulation-demodulation module, a satellite antenna and a control module, the control module can control the network switching switch to execute alternative switching-on action in real time based on a preset network priority rule, so that the remote operation equipment can be accessed to the internet through the satellite antenna or the 4G/5G router, and the DCS operation station can be accessed to the internet through the internet, so that the remote operation equipment can be connected by using the internet communication, even if no mobile signal exists, the industrial data can be automatically controlled through the satellite communication to realize the real-time transmission of the industrial control subsystem, and the actual wireless transmission of the firewall system can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a remote control system based on a DCS operation station according to an embodiment of the present application.
Detailed Description
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the present application will be briefly described below with reference to the accompanying drawings and the description of the embodiments or the prior art, and it is obvious that the following description of the structure of the drawings is only some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art. It should be noted that the description of these examples is for aiding in understanding the present application, but is not intended to limit the present application.
It should be understood that although the terms first and second, etc. may be used herein to describe various objects, these objects should not be limited by these terms. These terms are only used to distinguish one object from another. For example, a first object may be referred to as a second object, and similarly a second object may be referred to as a first object, without departing from the scope of example embodiments of the application.
It should be understood that for the term "and/or" that may appear herein, it is merely one association relationship that describes an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: three cases of A alone, B alone or both A and B exist; as another example, A, B and/or C, can represent the presence of any one of A, B and C or any combination thereof; for the term "/and" that may appear herein, which is descriptive of another associative object relationship, it means that there may be two relationships, e.g., a/and B, it may be expressed that: the two cases of A and B exist independently or simultaneously; in addition, for the character "/" that may appear herein, it is generally indicated that the context associated object is an "or" relationship.
Examples:
as shown in fig. 1, the remote control system based on the DCS operation station provided in the first aspect of the present embodiment includes, but is not limited to, a remote operation device, a wireless communication device, an internet, a firewall device and a distributed control system DCS operation station, wherein the wireless communication device includes, but is not limited to, an interface board, a network switch, a 4G/5G router, a modem module, a satellite antenna and a control module, the interface board is provided with a first control interface, a second control interface, a first network interface and a second network interface, and the network switch has a controlled interface, a third network interface, a satellite communication network interface and a 4G/5G network interface; the remote operation equipment is in communication connection with the first network interface, the first network interface is in communication connection with the second network interface, the second network interface is in communication connection with the third network interface, the satellite communication network interface is in communication connection with the modem module, the 4G/5G network interface is in communication connection with the 4G/5G router, the modem module is in communication connection with the satellite antenna through a signal receiving and transmitting link, the control module is in communication connection with the 4G/5G router through the first control interface, the control module is in communication connection with the controlled interface through the second control interface, and the control module is also in communication connection with the modem module and the satellite antenna respectively; the network switch is used for alternatively switching on the third network interface and the satellite communication network interface or the third network interface and the 4G/5G network interface according to the control signal input from the controlled interface; the control module is used for controlling the network switch to execute alternative switching on action in real time based on a preset network priority rule according to the detection result of the working signals of the 4G/5G router and the satellite antenna, so that the remote operation equipment can access the Internet through the satellite antenna or the 4G/5G router; the DCS operation station accesses the Internet through the firewall equipment so as to utilize the Internet to be in communication connection with the remote operation equipment.
As shown in fig. 1, in a specific structure of the remote control system, the remote operation device is an operation device which is arranged at a remote end of a factory and is controlled by the DCS operation station, for example, a subsystem such as a water pump with a PLC (Programmable Logic Controller ) can control a local device through the PLC and achieve the purposes of start-stop control, automatic control, data acquisition, alarm, monitoring, communication and the like of the local device. The interface board is a circuit board for providing diversified interfaces, wherein all control interfaces and all network interfaces are existing interfaces, for example, the control interfaces can be but not limited to adopting an RS-232 standard interface, and the network interfaces can be but not limited to adopting an RJ45 network cable interface. The internal specific structure of the network switch can be conventionally obtained based on the existing switch structure, and meanwhile, the third network interface, the satellite communication network interface and the 4G/5G network interface can also be but not limited to adopting an RJ45 network cable interface at the same time. The 4G/5G router is used as a gateway device in a 4G/5G network so as to wirelessly access the Internet, and can also be realized by adopting the existing products, such as a wireless routing product with the model of 'Yanfei 5G industrial gateway No. 1'. The modem module is used for transmitting an L-band signal to the satellite antenna through the signal receiving and transmitting link so as to search for satellites after receiving a starting instruction from the control module, and is used for demodulating the satellite signal received by the satellite antenna through the signal receiving and transmitting link and transmitting a demodulation result to the satellite communication network interface so as to be finally fed back to the remote operation equipment; specifically, the modem module may, but not limited to, be an IQ 200-series modem, and may be put into use after being plugged into a card or an internet of things card of three operators of chinese telecommunications (i.e., chinese mobile, chinese telecommunications and chinese UNICOM) and turned on. The satellite antenna is used for receiving and transmitting satellite signals so as to access a satellite communication carrier network; in particular, the radio frequency components in the satellite antenna may be, but are not limited to, up-lock converters (Block Up Converter, abbreviated BUC) or low noise block converters (Low Noise Block Converter, abbreviated LNB), etc.
The control module is the core of the overall wireless communication device and may be, but is not limited to, an integrated circuit chip of the type STM32F407 and its peripheral circuitry. Specifically, according to the detection results of the working signals of the 4G/5G router and the satellite antenna in real time, based on a preset network priority rule, the network switch is controlled to execute the alternative switching on action in real time, including but not limited to the following steps S11-S12.
S11, judging whether 4G/5G network signals exist or not in real time according to the working information of the on-line status lamp which is from the 4G/5G router and is acquired through the first control interface.
In the step S11, specifically, whether there is a 4G/5G network signal is determined in real time according to the working information of the on-line status lamp from the 4G/5G router and collected through the first control interface, including but not limited to: firstly, receiving online state lamp working information which is from the 4G/5G router and is acquired through the first control interface in real time; then, when the presence lamp operation information indicates that the presence lamp (i.e., an indicator lamp marked as "Online") of the 4G/5G router is on, it is determined that there is a 4G/5G network signal, and when the presence lamp operation information indicates that the presence lamp is off, it is determined that there is no 4G/5G network signal.
S12, if a 4G/5G network signal exists, the network switch is controlled to execute a switching action for conducting the third network interface and the 4G/5G network interface so that the remote operation equipment can access the Internet through the 4G/5G router, otherwise, the network switch is controlled to execute a switching action for conducting the third network interface and the satellite communication network interface so that the remote operation equipment can access the Internet through the modem module, the satellite antenna and the satellite communication operator network in sequence.
In the step S12, if there is a 4G/5G network signal, the cost required for satellite communication is considered to be far higher than the cost required for 4G/5G communication (because the satellite communication carrier and the terrestrial telecommunication carrier charge the network to switch to the internet on the ground, respectively, so that the cost required for satellite communication is a double charge), and the 4G/5G network interface and the 4G/5G router are preferably connected to the internet to realize networking communication, regardless of whether there is a satellite signal. If there is no 4G/5G network signal, the satellite communication network interface, the modem module and the satellite antenna need to be selected to be switched to the internet through a satellite communication carrier network and the internet, so as to ensure that the internet communication can be realized. Specifically, the network switch is controlled to perform a switching action for conducting the third network interface and the satellite communication network interface, including but not limited to: firstly starting a timer, and sending a starting instruction to the modulation and demodulation module to enable the modulation and demodulation module to perform satellite finding by transmitting an L-band signal to the satellite antenna; and then, if the satellite signal suitable for satellite communication is found by a beacon/carrier detection mode before the timing of the timer reaches a preset duration threshold, a switching instruction is sent to the network switching switch through the second control interface, so that the network switching switch executes switching action for conducting the third network interface and the satellite communication network interface, and otherwise, a communication failure message is fed back to the remote operation equipment. The specific mode of finding the star and the beacon/carrier detection mode are both the prior art means; the duration threshold may be, for example, 1 minute, and if satellite signals suitable for satellite communication are not found out after time-out, it indicates that no satellite signals exist at this time, and networking communication cannot be achieved.
The firewall device is used for isolating the internet from the DCS operation station so as to realize information security and ensure industrial network security and stability, and can preferably adopt an industrial multi-port security router which is of the EDR-810 series and integrates firewall/NAT (Network Address Translation, referred to as network address translation)/VPN (Virtual Private Network ) and two-layer network management switching functions so as to ensure isolation effect. The DCS operation station is used for performing automatic/manual feedback control according to the data from the remote operation device, and may be, but not limited to, an NT6000V4 system (i.e. a set of distributed control system DCS developed by nanjing, which integrates process control and enterprise management information technologies, and integrates the most advanced computer and communication technologies at present, and is composed of monitoring software, a control network, a distributed processing unit, an I/O network, an IO module, and other parts, and has the characteristics of reliability, openness, expandability, compatibility, plug and play, and the like), etc., and the Modbus driver is configured by its upper computer state software kqiew/RT V4.0, so as to be able to establish a communication list, a man-machine interface configuration, and the like.
Based on the detailed description of the remote control system, a remote control scheme integrating the satellite communication technology and the 4G/5G communication technology and realizing wireless transmission of an industrial control subsystem and a DCS system is provided, namely, the remote control scheme comprises a remote operation device, a wireless communication device, an internet, a firewall device and a distributed control system DCS operation station, wherein the wireless communication device comprises an interface board, a network switch, a 4G/5G router, a modem module, a satellite antenna and a control module, the control module can control the network switch to execute alternative switching-on action in real time based on a preset network priority rule, so that the remote operation device can be accessed to the internet through the satellite antenna or the 4G/5G router, and the DCS operation station can be also accessed to the internet through the firewall device, so that the remote operation device can be connected by using the internet communication, even if no mobile automatic signal exists, the industrial control subsystem can be realized, and the industrial control subsystem can be conveniently popularized and applied to the industrial control system in real time.
Preferably, the control module is further configured to, when the remote operation device accesses the internet through the satellite antenna or the 4G/5G router, obtain weather forecast data of the area in a next unit period from the internet, input the weather forecast data into a prediction model that is based on a neural network and has been trained, output a prediction result indicating whether the next unit period is a mobile signal unstable period, and finally, when the prediction result indicates that the next unit period is a mobile signal unstable period, control the network switch to switch on the third network interface and the satellite communication network interface all the time in the next unit period, so that the remote operation device can access the internet stably and sequentially through the modem module, the satellite antenna and a satellite communication operator network. The aforementioned unit period may be, but is not limited to, 10 minutes, 30 minutes, or 1 hour, etc., and thus the next unit period may be, but is not limited to, 10 minutes, 30 minutes, or 1 hour, etc. in the future. The neural network may be, but is not limited to, a feedback neural network or a convolutional neural network, or the like. The required training samples of the prediction model can be obtained by arranging the historically collected weather forecast data and the detection result of the working signal of the 4G/5G router: if it is found that there is an unstable moving signal in a certain historical unit period (for example, it is found that the number of times of extinction of the on-line status lamp of the 4G/5G router in the certain historical unit period exceeds a preset threshold) according to the detection result of the working signal of the 4G/5G router, weather forecast data corresponding to the certain historical unit period can be used as a positive sample, otherwise, the weather forecast data can be used as a negative sample. Based on the positive and negative samples, the prediction module can be obtained through training in advance in a conventional model training mode, and online training can be performed in real time. Therefore, through the prediction and control, the network switch can be prevented from being frequently switched in the unstable period of the mobile signal, the service life of the network switch can be further ensured, and the real-time performance of data communication can be further ensured not to be influenced by frequent switching.
Preferably, when the remote operation device is an operation device for performing external communication based on a Modbus RTU protocol, the remote control system further includes a protocol conversion device for performing mutual conversion between the Modbus RTU protocol and a Modbus TCP/IP protocol; the protocol conversion equipment is in communication connection with the remote operation equipment through an RS485 serial interface, and is also in communication connection with the first network interface through an RJ45 network cable interface. The Modbus RTU protocol is an open serial protocol and is widely applied to the current industrial monitoring equipment; the protocol uses an RS-232 or RS-485 serial interface for communication and is supported by almost all commercial SCADA (Supervisory Control And Data Acquisition, i.e. data acquisition and monitoring control system), HMI (acronym for Human Machine Interface, "man-machine interface") and OPC (acronym for OLE for Process Control) servers and data acquisition software programs on the market. Since the Modbus RTU protocol uses master/slave technology to communicate between devices (i.e., meaning that any application using the Modbus RTU protocol will have one Modbus master and at least one Modbus slave), the protocol conversion device may be referred to as a Modbus master and the remote operation device may be referred to as a Modbus slave.
In summary, the remote control system provided by the embodiment and based on the DCS operation station has the following technical effects:
(1) The embodiment provides a remote control scheme integrating a satellite communication technology and a 4G/5G communication technology and realizing wireless transmission of an industrial control subsystem and a DCS system, namely, the remote control scheme comprises remote operation equipment, wireless communication equipment, an internet, firewall equipment and a distributed control system DCS operation station, wherein the wireless communication equipment comprises an interface board, a network switch, a 4G/5G router, a modulation-demodulation module, a satellite antenna and a control module, the control module can control the network switch to execute alternative switching-on action in real time based on a preset network priority rule, so that the remote operation equipment can be accessed to the internet through the satellite antenna or the 4G/5G router, and the DCS operation station can be accessed to the internet through the network, so that the remote operation equipment can be connected by using the internet communication, even if no mobile signal exists, the remote operation station can be automatically controlled through the satellite communication, the industrial control subsystem can be realized, and the wireless data can be conveniently and practically transmitted through the industrial control subsystem.
Finally, it should be noted that: the foregoing description is only of the preferred embodiments of the application and is not intended to limit the scope of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (7)
1. The remote control system based on the DCS operation station is characterized by comprising remote operation equipment, wireless communication equipment, an internet, firewall equipment and a distributed control system DCS operation station, wherein the wireless communication equipment comprises an interface board, a network change-over switch, a 4G/5G router, a modulation-demodulation module, a satellite antenna and a control module, a first control interface, a second control interface, a first network interface and a second network interface are arranged on the interface board, and the network change-over switch is provided with a controlled interface, a third network interface, a satellite communication network interface and a 4G/5G network interface;
the remote operation equipment is in communication connection with the first network interface, the first network interface is in communication connection with the second network interface, the second network interface is in communication connection with the third network interface, the satellite communication network interface is in communication connection with the modem module, the 4G/5G network interface is in communication connection with the 4G/5G router, the modem module is in communication connection with the satellite antenna through a signal receiving and transmitting link, the control module is in communication connection with the 4G/5G router through the first control interface, the control module is in communication connection with the controlled interface through the second control interface, and the control module is also in communication connection with the modem module and the satellite antenna respectively;
the network switch is used for alternatively switching on the third network interface and the satellite communication network interface or the third network interface and the 4G/5G network interface according to the control signal input from the controlled interface;
the control module is used for controlling the network switch to execute alternative switching on action in real time based on a preset network priority rule according to the detection result of the working signals of the 4G/5G router and the satellite antenna, so that the remote operation equipment can access the Internet through the satellite antenna or the 4G/5G router;
the DCS operation station accesses the Internet through the firewall equipment so as to be in communication connection with the remote operation equipment by utilizing the Internet;
the foregoing real-time control, based on a preset network priority rule, the network switch to execute the alternative switching on action in real time according to the detection results of the working signals of the 4G/5G router and the satellite antenna, including: receiving online status lamp working information from the 4G/5G router in real time and collected through the first control interface; when the presence lamp working information indicates that the presence lamp of the 4G/5G router is on, determining that a 4G/5G network signal exists, and when the presence lamp working information indicates that the presence lamp is off, determining that no 4G/5G network signal exists; if a 4G/5G network signal exists, the network switch is controlled to execute a switching action for conducting the third network interface and the 4G/5G network interface so that the remote operation equipment can access the Internet through the 4G/5G router, otherwise, the network switch is controlled to execute a switching action for conducting the third network interface and the satellite communication network interface so that the remote operation equipment can access the Internet through the modem module, the satellite antenna and a satellite communication carrier network in sequence;
the control module is further configured to, when the remote operation device accesses the internet through the satellite antenna or the 4G/5G router, obtain weather forecast data of a region where the remote operation device is located in a next unit period from the internet, input the weather forecast data into a prediction model based on a neural network and trained, output a prediction result indicating whether the next unit period is a mobile signal unstable period, and finally, when the prediction result indicates that the next unit period is a mobile signal unstable period, control the network switch to switch on the third network interface and the satellite communication network interface all the time in the next unit period, so that the remote operation device can access the internet stably through the modulation and demodulation module, the satellite antenna and a satellite communication carrier network in sequence, where a required training sample of the prediction model is obtained by historical collected weather forecast data and working signal detection and finishing of the 4G/5G router: and if the number of times of extinction of the online status lamp of the 4G/5G router in a certain historical unit period is found to exceed a preset threshold according to the detection result of the working signal of the 4G/5G router, weather forecast data corresponding to the certain historical unit period is taken as a positive sample, and otherwise, the weather forecast data is taken as a negative sample.
2. The remote control system according to claim 1, wherein when the remote operation device is an operation device for performing external communication based on Modbus RTU protocol, the remote control system further comprises a protocol conversion device for performing inter-conversion between ModbusRTU protocol and ModbusTCP/IP protocol;
the protocol conversion equipment is in communication connection with the remote operation equipment through an RS485 serial interface, and is also in communication connection with the first network interface through an RJ45 network cable interface.
3. The remote control system of claim 1, wherein controlling the network switch to perform a switching action for switching on the third network interface and the satellite communication network interface comprises:
starting a timer, and sending a starting instruction to the modulation and demodulation module to enable the modulation and demodulation module to perform satellite finding by transmitting an L-band signal to the satellite antenna;
if the satellite signal suitable for satellite communication is found through the beacon/carrier detection mode before the timing of the timer reaches the preset duration threshold, a switching instruction is sent to the network switching switch through the second control interface, so that the network switching switch executes switching action for conducting the third network interface and the satellite communication network interface, and otherwise, a communication failure message is fed back to the remote operation equipment.
4. The remote control system of claim 1, wherein the modem module employs an IQ 200-series modem.
5. The remote control system of claim 1, wherein the radio frequency component in the satellite antenna employs an up-lock converter or a low noise module converter.
6. The remote control system of claim 1, wherein the firewall device employs an industrial-grade multiport security router of the type EDR-810 family that integrates firewall/NAT/VPN and two-layer network management switching functions.
7. The remote control system of claim 1, wherein the DCS operating station employs a NT6000V4 system and configures Modbus drivers through its upper level networking software KVIEW/RTV 4.0.
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