CN107634972B - Unidirectional communication system and board card of nuclear power station safety level system and non-safety level system - Google Patents
Unidirectional communication system and board card of nuclear power station safety level system and non-safety level system Download PDFInfo
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Abstract
The application belongs to the technical field of instrument control systems, and aims to solve the technical problem of potential hidden danger caused by a non-safety-level system to a safety-level system in the prior art; the application provides a one-way communication system and a board card suitable for a safety level system and a non-safety level system of a nuclear power station; the system comprises: the communication board card and the photoelectric conversion board card can transmit electric signals; a gateway communication interface board card connected with the photoelectric conversion board card; the photoelectric conversion board card comprises a first physical layer transceiver and a second physical layer transceiver, wherein the first physical layer transceiver is connected with the communication board card, and the second physical layer transceiver is connected with the gateway communication interface board card; and the first physical layer transceiver is capable of transmitting the received electrical signal to the second physical layer transceiver via the optical signal, and the second physical layer transceiver is incapable of transmitting the received electrical signal to the first physical layer transceiver.
Description
Technical Field
The application relates to the technical field of instrument control systems, in particular to a one-way communication system and a board card applicable to a safety level system and a non-safety level system of a nuclear power station, and more particularly relates to a system and a board card applicable to one-way communication between the safety level system and the non-safety level system of the nuclear power station based on Ethernet physics.
Background
With the application of computer and digitizing technology in the field of nuclear power station control system, the digitizing safety level system not only adopts network communication technology inside the safety level system, but also extends to data transmission between the safety level system and the non-safety level system; but for a security level control system, the security and reliability of the network are of great importance for the system to smoothly execute functions; the incapacity of the network function seriously affects the execution of the whole system function, and especially if a non-security level system transmits a signal affecting the security of the system to a security level system, the security of the reactor and the security of the whole nuclear power station are fatally affected. Therefore, in the communication process between the security level system and the non-security level system, independence needs to be ensured, and data flow from the lower security level system to the higher security level system needs to be avoided as much as possible; i.e. if there is signal communication between the secure level and the non-secure level control system, only one-way communication is allowed from the secure level to the non-secure level.
The inventors have found in the course of implementing the application that: in the digital system of the nuclear power station provided by the prior art, most of communication between a security level system and a non-security level system is logically guaranteed unidirectional communication, and the unidirectional communication is not physically guaranteed; however, the logic of the unidirectional transmission may be wrong, so that the communication influence of the security level system caused by the security level system is not thoroughly solved.
Disclosure of Invention
The method aims at solving the technical problem of potential hidden danger caused by a non-safety level system to a safety level system in the prior art; the application provides a one-way communication system and a board card suitable for a safety level system and a non-safety level system of a nuclear power station, which can realize the physical one-way communication of the safety level system and the non-safety level system from a hardware level, so that the digital safety level system of the nuclear power station is safer and more reliable.
In order to achieve the above object, the present application provides a technical solution comprising:
one aspect of the present application provides a one-way communication system between a safety level system and a non-safety level system of a nuclear power station, which is characterized by comprising:
the safety level system is provided with a communication board card and a photoelectric conversion board card, and electric signals can be transmitted between the communication board card and the photoelectric conversion board card;
the non-security system is provided with a gateway communication interface board card connected with the photoelectric conversion board card;
the photoelectric conversion board comprises a first physical layer transceiver and a second physical layer transceiver, wherein the first physical layer transceiver is connected with the communication board, and the second physical layer transceiver is connected with the gateway communication interface board; and the first physical layer transceiver is capable of transmitting the received electrical signal to the second physical layer transceiver via an optical signal, and the second physical layer transceiver is incapable of transmitting the received electrical signal to the first physical layer transceiver.
In the embodiment of the present application, preferably, the first physical layer transceiver and the second physical layer transceiver are respectively provided with a data transmitting port and a data receiving port, the data transmitting port of the first physical layer transceiver is connected with the data receiving port of the second physical layer transceiver, and the data receiving port of the first physical layer transceiver is disconnected with the data transmitting port of the second physical layer transceiver.
In the embodiment of the application, preferably, the data transmission is performed between the photoelectric conversion board card and the gateway communication interface board card through an ethernet protocol.
In an embodiment of the present application, preferably, the system further includes: the network card is arranged in the non-security system and is connected with the gateway communication interface board card.
In the embodiment of the present application, preferably, the first physical layer transceiver and the second physical layer transceiver are the same type of chip.
The application also provides a one-way communication board card of a safety level system and a non-safety level system of a nuclear power station, which is characterized by comprising:
the first physical layer transceiver is used for being connected with a communication board card in the security level system of the nuclear power station;
a second physical layer transceiver for connecting to a non-security level system intranet communication interface board;
wherein the first physical layer transceiver is capable of transmitting the received electrical signal to the second physical layer transceiver via an optical signal, and the second physical layer transceiver is incapable of transmitting the received electrical signal to the first physical layer transceiver.
In the embodiment of the present application, preferably, the first physical layer transceiver and the second physical layer transceiver are respectively provided with a data transmitting port and a data receiving port, the data transmitting port of the first physical layer transceiver is connected with the data receiving port of the second physical layer transceiver, and the data receiving port of the first physical layer transceiver is disconnected with the data transmitting port of the second physical layer transceiver.
In the embodiment of the present application, preferably, data transmission is performed between the second physical layer transceiver and the gateway communication interface board card through an ethernet protocol.
In the embodiment of the present application, preferably, the first physical layer transceiver and the second physical layer transceiver are the same type of chip.
In the embodiment of the application, preferably, the unidirectional communication board card is arranged in the security level system.
By adopting the technical scheme provided by the application, at least one of the following beneficial effects can be obtained:
1. in the photoelectric conversion board card, two physical layer transceivers (PHY chips) are used for realizing one-way communication physically, so that the physical one-way communication between the safety level system and the non-safety level system can be realized physically.
2. The physical unidirectional communication can be realized only by inputting the non-security level system between two physical layer transceivers (PHY chips) to the input port and the output port of the security level system without connection (namely disconnection), and complex hardware equipment and complex logic control are not required; therefore, the technical scheme of the application does not influence the project development period.
3. Two physical layer transceivers (PHY chips) of the photoelectric conversion board card adopt two identical chips, so that various materials can be avoided, and the material management cost is saved.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application may be realized and attained by the structure and/or process particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
Fig. 1 is a schematic diagram of a unidirectional communication board card of a security level system and a non-security level system of a nuclear power station according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a unidirectional communication system between a safety level system and a non-safety level system of a nuclear power station according to an embodiment of the present application.
Detailed Description
The following will describe embodiments of the present application in detail with reference to the drawings and examples, thereby solving the technical problems by applying technical means to the present application, and realizing the technical effects can be fully understood and implemented accordingly. It should be noted that these specific descriptions are only for easy and clear understanding of the present application by those skilled in the art, and are not meant to be limiting; and as long as no conflict is formed, each embodiment of the present application and each feature of each embodiment may be combined with each other, and the formed technical solutions are all within the protection scope of the present application.
Additionally, the steps illustrated in the flowcharts of the figures may be performed in a control system such as a set of controller-executable instructions, and although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that herein.
The following describes the technical scheme of the application in detail through the attached drawings and specific embodiments:
examples
As shown in fig. 1, the present embodiment provides a unidirectional communication board card applicable to a safety level system and a non-safety level system of a nuclear power plant, hereinafter also referred to as a photoelectric conversion board card 100, where the photoelectric conversion board card 100 includes:
a first physical layer transceiver (also referred to as PHY chip, PHY is generally referred to as Physical Layer Protocol, short for 10/100M ethernet physical layer transceiver) 110 for connection to a communication board card within the security level system of the nuclear power plant; the physical layer of the PHY chip defines the electrical and optical signals, line states, clock references, data encoding and circuitry, etc., required for data transmission and reception and provides a standard interface to the data link layer devices.
A second physical layer transceiver 120 for interfacing with a non-security level intra-system network communication interface board card; preferably, the second physical layer transceiver 120 is the same as the first physical layer transceiver 110, although one skilled in the art can select chips of different specifications according to requirements, the first physical layer transceiver 110 and the second physical layer transceiver 120 need to satisfy the following relationship:
the first physical layer transceiver 110 is capable of transmitting the received electrical signal to the second physical layer transceiver 120 through an optical signal, and the second physical layer transceiver 120 is incapable of transmitting the received electrical signal to the first physical layer transceiver 110.
In this embodiment, the first physical layer transceiver 110 and the second physical layer transceiver 120 are preferably provided with data transmitting ports 114, 122 and data receiving ports 112, 124, respectively, the data transmitting port 114 of the first physical layer transceiver 110 is connected to the data receiving port 124 of the second physical layer transceiver 120, and the data receiving port 112 of the first physical layer transceiver 110 is disconnected from the data transmitting port 122 of the second physical layer transceiver 120.
It should be noted that the "first" and "second" mentioned above are only for those skilled in the art to understand the specific implementation manner of the present embodiment more easily, and are not limited to the technical solution of the present embodiment, and those skilled in the art should understand that the "first" and "second" mentioned above may be exchanged or limited by other serial numbers. In addition, the photoelectric conversion board 100 may further be provided with more physical layer transceivers, for example, a physical layer transceiver is also provided on the left side of the first physical layer transceiver 100 in fig. 1, or a physical layer transceiver is also provided on the right side of the second physical layer transceiver 120, wherein the connection manner of the added physical layer transceivers with the first physical layer transceiver 110 or the second physical layer transceiver 120 may be bidirectional or unidirectional with reference to fig. 1; these can increase by oneself according to the needs of the developer; but these improved technical solutions all belong to the protection scope of the corresponding technical solutions of the embodiments of the present application.
The one-way communication board 100 is preferably arranged in the security system; of course, those skilled in the art can set the unidirectional communication board card 100 between the independent and safe level systems and the unsafe level system and as independent modules according to their own needs.
As shown in fig. 2, the present embodiment further provides a unidirectional communication system of a safety level system and a non-safety level system of a nuclear power plant, where the system includes:
a security level system (left dashed line box) provided with a communication board 200 and a photoelectric conversion board 100, the communication board 200 and the photoelectric conversion board 100 being capable of transmitting an electrical signal therebetween;
a non-security level system (right-side dotted line frame) provided with a gateway communication interface board 300 connected to the photoelectric conversion board 100;
the photoelectric conversion board 100 includes a first physical layer transceiver (also called PHY chip, PHY is generally called Physical Layer Protocol, short for 10/100M ethernet physical layer transceiver) 110 connected to the communication board 200 in the security level system of the nuclear power station; the physical layer of the PHY chip defines the electrical and optical signals, line states, clock references, data encoding and circuitry, etc., required for data transmission and reception and provides a standard interface to the data link layer devices.
A second physical layer transceiver 120 connected to the non-security level system intranet communication interface board card; preferably, the second physical layer transceiver 120 is the same as the first physical layer transceiver 110, although one skilled in the art can select chips of different specifications according to requirements, the first physical layer transceiver 110 and the second physical layer transceiver 120 need to satisfy the following relationship:
the first physical layer transceiver 110 is capable of transmitting the received electrical signal to the second physical layer transceiver 120 through an optical signal, and the second physical layer transceiver 120 is incapable of transmitting the received electrical signal to the first physical layer transceiver 110.
In this embodiment, the first physical layer transceiver 110 and the second physical layer transceiver 120 are preferably provided with data transmitting ports 114, 122 and data receiving ports 112, 124, respectively, the data transmitting port 114 of the first physical layer transceiver 110 is connected to the data receiving port 124 of the second physical layer transceiver 120, and the data receiving port 112 of the first physical layer transceiver 110 is disconnected from the data transmitting port 122 of the second physical layer transceiver 120.
In this embodiment, data transmission is preferably performed between the photoelectric conversion board and the gateway communication interface board through an ethernet protocol.
In this embodiment, preferably, the system further includes: the network card is arranged in the non-security system and is connected with the gateway communication interface board card.
More specifically, the technical solution provided in this embodiment is to extend the failure from the non-secure system to the secure system, and based on the logic guarantee of unidirectional communication, this embodiment proposes a physical unidirectional transmission manner, so that the physical and logic complete unidirectional communication is achieved, so as to solve the problem of unidirectional data transmission between the secure system and the non-secure system.
As shown in fig. 1 and 2, the photoelectric conversion board card provided in the embodiment is based on the unidirectional propagation characteristic of light, and the signal transmission by using the optical fiber can physically ensure that the process is unidirectional and feedback-free; the unidirectional optical transmission system and the unidirectional optical transmission system have the advantages that the unidirectional characteristics of the optical medium and the transmission equipment function are utilized, the safety-level photoelectric conversion board card is adopted, the optical fiber is used as the transmission medium, the unidirectional feedback-free transmission of data is realized by establishing a software transmission channel on the basis of realizing a completely unidirectional physical transmission channel, and the completeness and the reliability of the transmitted data under a unidirectional transmission environment are solved by formulating a corresponding safe transmission mechanism.
For the photoelectric conversion board card to be normally used, an RX port (transmitting port) must have an optical signal, so that the board card can be activated and normally used. When the photoelectric conversion board card does not have the signal reception due to the RX port, the security level communication system can prompt the equipment to have no connection and not be used normally, so that the TX port (receiving port) does not have the signal transmission, and the gateway communication interface board card does not have the signal reception due to the RX port, and cannot be activated. Therefore, the unidirectional communication photoelectric conversion board card provided by the embodiment disconnects the corresponding link from the unsafe system to the RX port in the direction of the safe system from the inside of the photoelectric conversion board card, and when the system works normally, the network communication electric signal of the safe system is converted into an optical signal and sent to the unsafe system, but the optical signal of the unsafe system cannot be received.
When the system works normally, the communication board card of the security level system sends communication data to the PHY chip of the photoelectric conversion board card in an electric signal mode, the photoelectric conversion board card converts the electric signal into an optical signal and transmits the optical signal to the gateway communication interface board card of the non-security level system through the PHY chip, and the gateway communication interface board card transmits the communication data to the gateway; if the gateway of the non-security system is abnormal, when the gateway transmits data to the security system, the gateway transmits the data to the photoelectric conversion board card of the security system through the gateway communication interface board card, and as the PHY chips in the photoelectric conversion board card are disconnected, the security system cannot receive the data transmitted by the non-security system, namely, a link is physically cut off, so that the physical unidirectional communication between the security system and the non-security system is realized.
The above system is described by taking the application to a nuclear power station as an example: the security level system of the nuclear power station sends an alarm signal to the non-security level system in a communication mode, and only one-way communication of data is allowed, namely, the data flows from the security level to the non-security level. When the system works normally, the communication board card of the security level system sends communication data to the PHY chip of the photoelectric conversion board card in an electric signal mode, the photoelectric conversion board card converts the electric signal into an optical signal and transmits the optical signal to the gateway communication interface board card of the non-security level system through the PHY chip, and the gateway communication interface board card transmits the communication data to the gateway; if the gateway of the non-security system is abnormal, when the gateway transmits data to the security system, the gateway transmits the data to the photoelectric conversion board card of the security system through the gateway communication interface board card, and as the PHY chips in the photoelectric conversion board card are disconnected, the security system cannot receive the data transmitted by the non-security system, namely, a link is physically cut off, so that the physical unidirectional communication between the security system and the non-security system is realized.
By adopting the technical scheme provided by the application, at least one of the following beneficial effects can be obtained:
1. in the photoelectric conversion board card, two physical layer transceivers (PHY chips) are used for realizing one-way communication physically, so that the physical one-way communication between the safety level system and the non-safety level system can be realized physically.
2. The physical unidirectional communication can be realized only by inputting the non-security level system between two physical layer transceivers (PHY chips) to the input port and the output port of the security level system without connection (namely disconnection), and complex hardware equipment and complex logic control are not required; therefore, the technical scheme of the application does not influence the project development period.
3. Two physical layer transceivers (PHY chips) of the photoelectric conversion board card adopt two identical chips, so that various materials can be avoided, and the material management cost is saved.
Finally, it should be noted that the above description is only a preferred embodiment of the present application, and is not intended to limit the present application in any way. Any person skilled in the art can make many possible variations and simple substitutions to the technical solution of the present application by using the methods and technical matters disclosed above without departing from the scope of the technical solution of the present application, and these all fall into the scope of protection of the technical solution of the present application.
Claims (10)
1. A one-way communication system of a safety level system and a non-safety level system of a nuclear power plant, comprising:
the safety level system is provided with a communication board card and a photoelectric conversion board card, and electric signals can be transmitted between the communication board card and the photoelectric conversion board card;
the non-security system is provided with a gateway communication interface board card connected with the photoelectric conversion board card;
the photoelectric conversion board comprises a first physical layer transceiver and a second physical layer transceiver, wherein the first physical layer transceiver is connected with the communication board, and the second physical layer transceiver is connected with the gateway communication interface board; and the first physical layer transceiver is capable of transmitting the received electrical signal to the second physical layer transceiver via an optical signal, and the second physical layer transceiver is incapable of transmitting the received electrical signal to the first physical layer transceiver; and the unidirectional communication photoelectric conversion board card formed by the first physical layer transceiver and the second physical layer transceiver disconnects a corresponding link from the non-security system to the RX port in the direction of the security system in the photoelectric conversion board card, and if the gateway of the non-security system is abnormal, the gateway transmits data to the photoelectric conversion board card of the security system through the gateway communication interface board card, and the security system cannot receive the data transmitted by the non-security system because the PHY chip in the unidirectional communication photoelectric conversion board card is disconnected.
2. The system of claim 1, wherein the first physical layer transceiver and the second physical layer transceiver are each provided with a data transmission port and a data reception port, the data transmission port of the first physical layer transceiver being connected to the data reception port of the second physical layer transceiver, the data reception port of the first physical layer transceiver being disconnected from the data transmission port of the second physical layer transceiver.
3. The system of claim 1, wherein the photovoltaic conversion card and the gateway communication interface card are in data transmission via an ethernet protocol.
4. A system according to claim 3, further comprising: the network card is arranged in the non-security system and is connected with the gateway communication interface board card.
5. The system of claim 1, wherein the first physical layer transceiver and the second physical layer transceiver are the same type of chip.
6. A one-way communication board card of a nuclear power station safety level system and a non-safety level system, which is characterized by comprising:
the first physical layer transceiver is used for being connected with a communication board card in the security level system of the nuclear power station;
a second physical layer transceiver for connecting to a non-security level system intranet communication interface board;
wherein the first physical layer transceiver is capable of transmitting the received electrical signal to the second physical layer transceiver via an optical signal, and the second physical layer transceiver is incapable of transmitting the received electrical signal to the first physical layer transceiver; and the unidirectional communication photoelectric conversion board card formed by the first physical layer transceiver and the second physical layer transceiver disconnects a corresponding link from the non-security system to the RX port in the direction of the security system in the photoelectric conversion board card, and if the gateway of the non-security system is abnormal, the gateway transmits data to the photoelectric conversion board card of the security system through the gateway communication interface board card, and the security system cannot receive the data transmitted by the non-security system because the PHY chip in the unidirectional communication photoelectric conversion board card is disconnected.
7. The board card of claim 6, wherein the first physical layer transceiver and the second physical layer transceiver are respectively provided with a data transmission port and a data reception port, the data transmission port of the first physical layer transceiver is connected to the data reception port of the second physical layer transceiver, and the data reception port of the first physical layer transceiver is disconnected from the data transmission port of the second physical layer transceiver.
8. The board card of claim 6, wherein the second physical layer transceiver and the gateway communication interface board card are configured to communicate data therebetween via an ethernet protocol.
9. The board card of claim 6, wherein the first physical layer transceiver and the second physical layer transceiver are the same type of chip.
10. The board card of claim 6, wherein the one-way communication board card is disposed within the security level system.
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| CN201711040785.5A CN107634972B (en) | 2017-10-31 | 2017-10-31 | Unidirectional communication system and board card of nuclear power station safety level system and non-safety level system |
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| CN201711040785.5A CN107634972B (en) | 2017-10-31 | 2017-10-31 | Unidirectional communication system and board card of nuclear power station safety level system and non-safety level system |
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| CN107634972B true CN107634972B (en) | 2023-08-29 |
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| CN108683513A (en) * | 2018-05-31 | 2018-10-19 | 北京广利核系统工程有限公司 | The one-way communication system and board of nuclear power station security level system and non-security grade system |
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