CN115359644A - Remote control system based on DCS operation station - Google Patents
Remote control system based on DCS operation station Download PDFInfo
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- CN115359644A CN115359644A CN202210983499.7A CN202210983499A CN115359644A CN 115359644 A CN115359644 A CN 115359644A CN 202210983499 A CN202210983499 A CN 202210983499A CN 115359644 A CN115359644 A CN 115359644A
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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
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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
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- 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
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- 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
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- 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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Abstract
The invention discloses a remote control system based on a DCS (distributed control system) 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 selector 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 through the internet in a communication mode, and further wireless transmission between an industrial control subsystem and the DCS can be automatically realized through satellite communication even if no mobile signal exists, and the real-time performance of data communication is ensured.
Description
Technical Field
The invention belongs to the technical field of industrial control, and particularly relates to a remote control system based on a DCS (distributed control system) operation station.
Background
Industrial Control (Factory Control) mainly refers to the use of computer technology, microelectronic technology and electrical means to make the production and manufacturing process of a Factory more automated, efficient and accurate, and with controllability and visibility. In the existing industrial Control System, a factory Distributed Control System (DCS) generally needs to establish a link with an industrial Control subsystem (e.g., an operating System based on a programmable logic controller PLC), for example, subsystems such as a reclaimed water pump need to perform real-time data communication with a factory DCS System, however, the existing methods for establishing real-time data communication all use a wired transmission method, for example, an existing patent with a publication number of CN209469566U and a name of "a variety of water pump Control systems based on DCS", wherein, wired connection methods are used between the water pump and the main Control cabinet, and are only suitable for a short-distance System link scenario, and cannot meet new remote Control requirements.
In view of the above remote control requirements, there is also a purpose of implementing wireless transmission between an industrial control subsystem and a DCS based on a terrestrial mobile communication system at present, but the terrestrial mobile communication system still has certain limitations, that is, in some areas, a macro base station cannot be constructed in a short time due to a harsh environment, and problems such as a large construction cost exist, so that these areas are areas without signal coverage or areas without a local telecommunications carrier providing a terrestrial mobile communication network. For example, in a geographical area such as an ocean, a mountain area or a desert, a ground mobile communication network hardly exists due to the difficulty in erecting a macro base station; in areas such as remote villages, remote residential sites, ecological areas or small islands, local telecom operators are not provided with a ground mobile communication network due to huge network construction cost; in a natural disaster area such as an earthquake, for example, a macro base station may cause an accident such as damage, and thus a temporary mobile signal may not be transmitted. Therefore, only by the ground mobile communication system, there is a risk that data communication cannot be performed/data communication is temporarily interrupted because of no mobile signal, so that the real-time performance of data communication between the industrial control subsystem and the DCS system cannot be completely ensured.
Therefore, in consideration of the characteristic of wide coverage area of satellite communication, an urgent need exists in the art for a research task to provide a remote control scheme based on a satellite communication technology and a 4G/5G communication technology and realizing wireless transmission between an industrial control subsystem and a DCS system, so as to ensure real-time data communication between the industrial control subsystem and the DCS system.
Disclosure of Invention
The invention aims to provide a remote control system based on a DCS (distributed control system) operation station, which is used for solving the problem that the real-time performance of data communication between an industrial control subsystem and the DCS cannot be completely ensured due to the risk that data communication cannot be carried out/data communication is temporarily interrupted because no mobile signal exists in the conventional remote control scheme based on a ground mobile communication system.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, a remote control system based on a DCS operating station is provided, which includes a remote operating device, a wireless communication device, an internet, a firewall device, and a distributed control system DCS operating 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 has 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 transceiving 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 further in communication connection with the modem module and the satellite antenna respectively;
the network switch is used for switching and conducting the third network interface and the satellite communication network interface or the third network interface and the 4G/5G network interface alternatively according to a control signal input from the controlled interface;
the control module is used for controlling the network switch to execute alternative switching conducting actions in real time according to the detection results of the working signals of the 4G/5G router and the satellite antenna in real time and 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 is accessed to the Internet through the firewall equipment so as to be in communication connection with the remote operation equipment through the Internet.
Based on the above invention, a remote control scheme is provided that integrates a satellite communication technology and a 4G/5G communication technology and implements wireless transmission between an industrial control subsystem and a DCS system, that is, the remote control scheme includes a remote operating device, a wireless communication device, an internet, a firewall device and a distributed control system DCS operating station, wherein 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, the control module can control the network switch to perform an alternative switching on operation in real time according to a detection result of a working signal to the 4G/5G router and the satellite antenna based on a preset network priority rule, so that the remote operating device can access the internet through the satellite antenna or the 4G/5G router, and the DCS operating station can access the internet through the DCS operating station, so that the internet can be used to connect the remote operating device in a communication manner, and even if no mobile signal occurs, the industrial control subsystem and the DCS operating station can be automatically implemented through the satellite communication, thereby ensuring real-time data transmission and facilitating popularization.
In a possible design, the control module is further configured to, when the remote operating device accesses the internet through the satellite antenna or the 4G/5G router, obtain weather forecast data of a region 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 switcher 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 operating device can stably access the internet sequentially through the modem module, the satellite antenna, and a satellite communication operator network.
In one possible design, when the remote operating equipment is operating equipment for performing external communication based on a Modbus RTU protocol, the remote control system further comprises protocol conversion equipment for performing interconversion 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 the protocol conversion equipment is also in communication connection with the first network interface through an RJ45 network cable interface.
In one possible design, the controlling the network switch to perform the alternative switching on action in real time according to the detection result of the working signal of the 4G/5G router and the satellite antenna based on the preset network priority rule includes:
judging whether a 4G/5G network signal exists 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;
and if a 4G/5G network signal exists, controlling the network switch to execute a switching action for conducting the third network interface and the 4G/5G network interface so as to enable the remote operation equipment to access the internet through the 4G/5G router, otherwise, controlling the network switch to execute a switching action for conducting the third network interface and the satellite communication network interface so as to enable the remote operation equipment to access the internet sequentially through the modem module, the satellite antenna and the satellite communication operator network.
In one possible design, the determining whether there is a 4G/5G network signal according to the operation information of the on-line status light collected from the 4G/5G router through the first control interface in real time includes:
receiving the working information of the on-line status lamp from the 4G/5G router in real time and collected through the first control interface;
and when the working information of the online status lamp indicates that the online status lamp of the 4G/5G router is on, judging that a 4G/5G network signal exists, and when the working information of the online status lamp indicates that the online status lamp is off, judging that no 4G/5G network signal exists.
In one possible design, controlling the network switch to perform a switching action for conducting the third network interface with 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 search for the satellite by transmitting an L-band signal to the satellite antenna;
if the satellite signal suitable for satellite communication is found through a beacon/carrier detection mode before the timing of the timer reaches a preset time threshold, a switching instruction is sent to the network switch through the second control interface, so that the network switch executes a switching action for conducting the third network interface and the satellite communication network interface, and if not, a communication failure message is fed back to the remote operation equipment.
In one possible design, the modem module is an IQ200 series modem.
In one possible design, the radio frequency components in the satellite antenna employ an up-lock converter or a low noise block converter.
In one possible design, the control module uses an integrated circuit chip of model number STM32F407 and its peripheral circuits.
In one possible design, the firewall device is an industrial-grade multi-port security router with the model number of EDR-810 and integrated firewall/NAT/VPN and two-layer network management switching functions.
In one possible design, the DCS operating station adopts an NT 6000V 4 system, and configures Modbus drivers through configuration software KVIEW/RT V4.0 of an upper computer.
The beneficial effect of above-mentioned scheme:
(1) The invention 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 selector switch, a 4G/5G router, a modulation and demodulation module, a satellite antenna and a control module, the control module can control the network selector switch to execute alternative switching conducting actions in real time according to the detection result of working signals of the 4G/5G router and the satellite antenna on the basis of 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, the DCS operation station is also accessed to the internet through the firewall equipment, the remote operation equipment can be connected to the remote operation equipment through the internet communication, and further, even if no mobile signal exists, the industrial control subsystem and the DCS system can be automatically realized through the satellite communication, and the wireless control subsystem and the wireless transmission system can be conveniently popularized, and the real-time data can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a remote control system based on a DCS operating station according to an embodiment of the present application.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly described below with reference to the accompanying drawings and the embodiments or the description in the prior art, it is obvious that the following description of the structure of the drawings is only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.
It will be understood that, although the terms first, 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 present invention.
It should be understood that, for the term "and/or" as may appear herein, it is merely an associative relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, B exists alone or A and B exist at the same time; also for example, A, B and/or C, may indicate the presence of any one or any combination of A, B and C; for the term "/and" as may appear herein, which describes another associative object relationship, it means that two relationships may exist, e.g., a/and B, may mean: a exists singly or A and B exist simultaneously; in addition, for the character "/" that may appear herein, it generally means that the former and latter associated objects are in an "or" relationship.
Example (b):
as shown in fig. 1, the remote control system based on a DCS operating 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 operating station, where 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, where the interface board has 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 transceiving 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 further in communication connection with the modem module and the satellite antenna respectively; the network switch is used for alternatively switching and conducting the third network interface and the satellite communication network interface or the third network interface and the 4G/5G network interface according to a control signal input from the controlled interface; the control module is used for controlling the network switch to execute alternative switching conducting actions in real time according to the detection results of the working signals of the 4G/5G router and the satellite antenna in real time and based on a preset network priority rule, so that the remote operation equipment can access the internet through the satellite antenna or the 4G/5G router; the DCS operation station is connected to the internet through the firewall equipment, so that the internet is used for communication connection with the remote operation equipment.
As shown in fig. 1, in a specific structure of the remote control system, the remote operating device is an operating device that is factory-arranged at a remote end and is controlled by the DCS operating station, for example, a subsystem such as a central water pump having a PLC (Programmable Logic Controller), which 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 providing diversified interfaces, wherein all control interfaces and all network interfaces are existing interfaces, for example, the control interfaces may but are not limited to adopt RS-232 standard interfaces, and the network interfaces may but are not limited to adopt RJ45 network interface. The internal specific structure of the network switch can be obtained conventionally 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 adopt, but are not limited to, RJ45 network cable interfaces 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 number of 'wild goose flying 5G industrial gateway No. 1'. The modulation and demodulation module is used for transmitting an L-band signal to the satellite antenna through the signal transceiving link after receiving a starting instruction from the control module so as to search for a satellite, and is used for demodulating the satellite signal after receiving the satellite signal received by the satellite antenna through the signal transceiving link and transmitting the demodulation result to the satellite communication network interface so as to finally feed back the demodulation result to the remote operation equipment; specifically, the modem module may be, but not limited to, an IQ 200-series modem, and may be inserted into a card of three operators of china telecommunications (i.e., china mobile, china telecommunications, and china unicom) or an internet of things card and opened before being put into use. The satellite antenna is used for receiving and transmitting satellite signals so as to access a satellite communication operator network; specifically, the radio frequency components in the satellite antenna may be, but are not limited to, a Block Up Converter (BUC for short) or a Low Noise Block Converter (LNB for short).
The control module is the core of the whole wireless communication device, and can adopt but not limited to an integrated circuit chip with the model number of STM32F407 and peripheral circuits thereof. Specifically, the method includes, but is not limited to, controlling the network switch to perform the alternative switching on operation in real time according to the detection result of the working signals of the 4G/5G router and the satellite antenna based on a preset network priority rule, where the steps include, but are not limited to, the following steps S11 to S12.
S11, judging whether a 4G/5G network signal exists or not in real time according to the on-line state lamp working information which is from the 4G/5G router and acquired through the first control interface.
In step S11, specifically, it is determined whether there is a 4G/5G network signal in real time according to the operation information of the on-line status light, which is from the 4G/5G router and collected through the first control interface, including but not limited to: firstly, receiving the working information of the on-line status lamp from the 4G/5G router in real time and collected through the first control interface; then, when the operation information of the Online status lamp indicates that an Online status lamp (namely, an indicator lamp marked as "Online") of the 4G/5G router is on, a 4G/5G network signal is determined to exist, and when the operation information of the Online status lamp indicates that the Online status lamp is off, no 4G/5G network signal is determined to exist.
And S12, if a 4G/5G network signal exists, controlling the network switch to execute a switching action for conducting the third network interface and the 4G/5G network interface so as to enable the remote operation equipment to be accessed to the Internet through the 4G/5G router, otherwise, controlling the network switch to execute a switching action for conducting the third network interface and the satellite communication network interface so as to enable the remote operation equipment to be accessed to the Internet through the modulation and demodulation module, the satellite antenna and a satellite communication operator network in sequence.
In the step S12, if there is a 4G/5G network signal, considering that the cost required for satellite communication is much higher than that required for 4G/5G communication (because the satellite communication operator and the terrestrial telecom operator charge separately through the network switching of the satellite communication operator to the terrestrial internet, so that the cost required for satellite communication is a double charge), the 4G/5G network interface and the 4G/5G router are preferably used to access the internet to implement networking communication regardless of whether there is a satellite signal. And if no 4G/5G network signal exists, the satellite communication network interface, the modulation and demodulation module and the satellite antenna are required to be selected to switch into the internet through a satellite communication operator network and the internet, so that networking communication can be ensured. Specifically, the network switch is controlled to perform a switching action for conducting the third network interface and the satellite communication network interface, which includes but is not limited to: starting a timer, and sending a starting instruction to the modulation and demodulation module to enable the modulation and demodulation module to search for the satellite by transmitting an L-waveband signal to the satellite antenna; and then, if a satellite signal suitable for satellite communication is found out in a beacon/carrier detection mode before the timing of the timer reaches a preset time threshold, sending a switching instruction to the network switch through the second control interface to enable the network switch to execute a switching action for conducting the third network interface and the satellite communication network interface, otherwise, feeding back a communication failure message to the remote operation equipment. The specific satellite finding mode and the beacon/carrier detection mode are both the prior art means; the time threshold may be, for example, 1 minute, and if no satellite signal suitable for satellite communication is found after timeout, it indicates that there is no satellite signal at this time, and networking communication cannot be achieved.
The firewall device is used for isolating the internet and the DCS operating station so as to implement information security and ensure the security and stability of an industrial Network, and an industrial-grade multi-port security router which is of an EDR-810 series and integrates firewall/NAT (Network Address Translation)/VPN (Virtual Private Network) and two-layer Network management switching functions can be preferably used so as to ensure the isolation effect. The DCS operation station is used for carrying out automatic/manual feedback control according to data from the remote operation equipment, but not limited to an NT 6000V 4 system (a set of distributed control system DCS developed by Nanjing Keyuan, which integrates process control and enterprise management information technology, integrates the most advanced computer and communication technology at present, consists of monitoring software, a control network, a distributed processing unit, an I/O network, an IO module and the like, and has the characteristics of reliability, openness, expandability, compatibility, plug and play and the like), and the like, and configures Modbus drive through upper computer configuration software KVIEW/RT V4.0 so as to establish a communication list, human-computer interface configuration and the like.
Therefore, based on the detailed description of the remote control system, 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 is provided, that is, 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 modem module, a satellite antenna and a control module, the control module can control the network switch to perform alternative switching on actions in real time according to detection results of working signals of the 4G/5G router and the satellite antenna based on preset network priority rules, 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 is also accessed to the internet through the firewall equipment, so that the remote operation equipment can be connected to the internet in a communication manner, and further, even if no mobile signal occurs, the industrial control subsystem and the DCS operation station can be automatically realized through the firewall equipment, and the remote control scheme can be conveniently popularized.
Preferably, the control module is further configured to, when the remote operating device accesses the internet through the satellite antenna or the 4G/5G router, obtain weather forecast data of a region in a next unit period from the internet, input the weather forecast data into a prediction model based on a neural network and having 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 switcher to conduct the third network interface and the satellite communication network interface all the time in the next unit period, so that the remote operating device can stably access the internet sequentially through the modem module, the satellite antenna, and a satellite communication operator network. The aforementioned unit time period may be, but is not limited to, 10 minutes, 30 minutes, or 1 hour, etc., and thus the next unit time period may be, but is not limited to, 10 minutes in the future, 30 minutes in the future, or 1 hour in the future, etc. The neural network may be, but is not limited to, a feedback neural network, a convolutional neural network, or the like. The required training samples of the prediction model can be obtained by sorting the historical collected weather forecast data and the detection result of the working signal of the 4G/5G router: if it is found that a mobile signal instability condition exists in a certain historical unit period according to the detection result of the working signal of the 4G/5G router (for example, it is found that the number of times of turning off an on-line status lamp of the 4G/5G router in the certain historical unit period exceeds a preset threshold), the 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 a conventional model training mode in advance, and online training can be carried out in real time. Therefore, through the prediction and the control, the network change-over switch can be prevented from being frequently switched in the unsteady period of the mobile signal, so that the service life of the network change-over switch can be ensured, and the instantaneity of data communication cannot be influenced due to frequent switching.
Preferably, when the remote operating device is an operating device performing external communication based on a Modbus RTU protocol, the remote control system further comprises a protocol conversion device for performing interconversion 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 the protocol conversion equipment 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 RS-232 or RS-485 serial interfaces for communication And is supported by almost all commercial SCADA (Supervisory Control And Data Acquisition, data Acquisition And monitoring Control systems), HMI (Human Machine Interface, short for "Human Machine Interface"), OPC (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 station and at least one Modbus slave station), the protocol conversion device can be referred to as a Modbus master station and the remote work devices as Modbus slaves.
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 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, that is, the remote control scheme includes a remote operating device, a wireless communication device, an internet, a firewall device and a distributed control system DCS operating station, wherein 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, the control module can control the network switch to perform alternative switching on actions in real time according to a detection result of working signals of the 4G/5G router and the satellite antenna based on a preset network priority rule, so that the remote operating device can access the internet through the satellite antenna or the 4G/5G router, and the DCS operating station also accesses the internet through the firewall device, so that the remote operating device can be connected through internet communication, even if no mobile signal occurs, the industrial control subsystem and the DCS system can be automatically realized through satellite communication, and the wireless transmission subsystem can be conveniently popularized.
Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A remote control system based on a 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 switch, a 4G/5G router, a modulation and 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 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 transceiving 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 further in communication connection with the modem module and the satellite antenna respectively;
the network switch is used for switching and conducting the third network interface and the satellite communication network interface or the third network interface and the 4G/5G network interface alternatively according to a control signal input from the controlled interface;
the control module is used for controlling the network switch to execute alternative switching conducting actions in real time according to the detection results of the working signals of the 4G/5G router and the satellite antenna in real time and based on a preset network priority rule, so that the remote operation equipment can access the internet through the satellite antenna or the 4G/5G router;
the DCS operation station is connected to the internet through the firewall equipment, so that the internet is used for communication connection with the remote operation equipment.
2. The remote control system according to claim 1, wherein 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 in a next unit period from the internet, input the weather forecast data into a neural network-based prediction model that 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 conduct the third network interface and the satellite communication network interface at all times in the next unit period, so that the remote operation device can stably access the internet through the modem module, the satellite antenna, and a satellite communication provider network in sequence.
3. The remote control system according to claim 1, wherein when the remote operating device is an operating device for performing out-of-office communication based on a Modbus RTU protocol, the remote control system further comprises a protocol conversion device for performing interconversion 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 the protocol conversion equipment is also in communication connection with the first network interface through an RJ45 network cable interface.
4. The remote control system according to claim 1, wherein the real-time controlling the network switch to perform the alternative switching on action based on a preset network priority rule according to the detection result of the operating signals of the 4G/5G router and the satellite antenna comprises:
judging whether a 4G/5G network signal exists 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;
and if a 4G/5G network signal exists, controlling the network switch to execute a switching action for conducting the third network interface and the 4G/5G network interface so as to enable the remote operation equipment to access the internet through the 4G/5G router, otherwise, controlling the network switch to execute a switching action for conducting the third network interface and the satellite communication network interface so as to enable the remote operation equipment to access the internet sequentially through the modem module, the satellite antenna and the satellite communication operator network.
5. The remote control system of claim 4, wherein determining whether there is a 4G/5G network signal in real time according to the operation information of the on-line status light from the 4G/5G router and collected through the first control interface comprises:
receiving the working information of the on-line status lamp from the 4G/5G router in real time and collected through the first control interface;
and when the working information of the online status lamp indicates that the online status lamp of the 4G/5G router is on, judging that a 4G/5G network signal exists, and when the working information of the online status lamp indicates that the online status lamp is off, judging that no 4G/5G network signal exists.
6. The remote control system of claim 4, wherein controlling the network switch to perform a switching action for conducting the third network interface with the satellite communications 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 search for the satellite by transmitting an L-band signal to the satellite antenna;
if the satellite signal suitable for satellite communication is found through a beacon/carrier detection mode before the timing of the timer reaches a preset time threshold, a switching instruction is sent to the network switch through the second control interface, so that the network switch executes a switching action for conducting the third network interface and the satellite communication network interface, and if not, a communication failure message is fed back to the remote operation equipment.
7. The remote control system of claim 1 wherein said modem module is a modem of the type IQ200 series.
8. The remote control system of claim 1, wherein the radio frequency components in the satellite antenna employ an up-lock converter or a low noise block converter.
9. The remote control system of claim 1, wherein the firewall device employs an industrial-grade multiport security router of model EDR-810 and integrating firewall/NAT/VPN and two-layer network management switching functions.
10. The remote control system of claim 1, wherein the DCS operator station employs an NT 6000V 4 system and configures Modbus drivers via its host configuration software KVIEW/RT V4.0.
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