CN217061462U - Man-machine interface device applied to emergency diesel engine of nuclear power station - Google Patents
Man-machine interface device applied to emergency diesel engine of nuclear power station Download PDFInfo
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Abstract
The utility model provides a man-machine interface device applied to an emergency diesel engine of a nuclear power station, wherein the functions of an emergency diesel generator instrument control system served by the man-machine interface device are distributed in 3 cabinets, namely a safety control cabinet, a non-safety control cabinet and a gateway cabinet; the safety control cabinet realizes the safety protection function of the emergency diesel engine, and the non-safety control cabinet realizes the control function of the emergency diesel engine; the gateway cabinet is mainly used for communicating with other instrument control systems, receiving bus communication data of field bus equipment and then sending the bus communication data to the control cabinet; the safety control cabinet, the non-safety control cabinet and the gateway cabinet are all realized by a full digital platform; the man-machine interface device provides an operation window for realizing the control function of the nuclear power station diesel generator, and data interaction is carried out through communication.
Description
Technical Field
The utility model relates to an emergent diesel engine's man-machine interface device, concretely relates to be applied to emergent diesel engine's of nuclear power station man-machine interface device.
Background
The man-machine interface device is a display and operation window of an Emergency Diesel Generator (EDG) control system, can start and stop EDG equipment, detect main parameters of a diesel engine and main parameters of a generator, monitor air inlet and outlet, compressed air, lubricating oil, fuel oil, a cooling water system, thermal parameters of the generator and the like, and output display and alarm. The EDG control system is an important instrument control system configured for controlling the diesel engine, the generator and the corresponding auxiliary system, when the main power supply and the auxiliary power supply of the nuclear power plant are in power failure, the emergency diesel generator needs to be started immediately at a set time and complete power supply of a special safety facility, the EDG control system is particularly important for ensuring the safety function of a reactor of the nuclear power plant, and therefore the human-computer interface device also plays a vital role in stable operation of the EDG control system.
The EDG man-machine interface matching scheme of the current domestic nuclear power station mainly comprises the following two schemes: (1) most control systems also adopt relays, a human-computer interface adopts a panel to arrange instrument parameter display, the human-computer interface has limited display information, the operation and the maintenance are inconvenient, and the safety level is low; (2) a small part of control systems adopt a relay + PLC control scheme, a touch screen is used as a man-machine interface, and collected parameter signals are displayed to realize semi-digitalization. The traditional relay control structure is difficult in man-machine interaction and complex in maintenance; the touch screen has the advantages of easy operation, firmness, durability, high reaction speed, space saving and the like, and is widely applied to the field of industrial control; a human-machine interface (HMI) used in an instrument control system of a diesel generator set expresses some commonly used parameters and alarm information in a dynamic and visual mode, the commonly used parameters and alarm information are not characters which are relatively boring to look at any more, and an HMI touch screen is more and more approved by a user.
However, with the maturity of the digital DCS technology, the EDG control system has higher requirements for reliability and higher requirements for a human-computer interface, and the traditional touch screen needs to be improved in terms of reliability and usability; however, no touch screen equipment specially used in the nuclear power industry exists in the market, the problem also exists how the HMI touch screen in the market is connected into the nuclear grade full-digital instrument control system, the nuclear grade DCS has independent intellectual property rights, and the touch screen operation system in the market cannot be simply communicated with the nuclear grade full-digital instrument control system.
The man-machine interface device is used as a display and operation window of a control system, especially needs to collect instrument parameters of each system and realize the operation of equipment, the implementation scheme needs to be designed based on a control system architecture, and the system architecture influences the man-machine interface display parameter range and the man-machine interface performance.
The EDG instrument control system served by the man-machine interface device is divided into a 1E control system and an NC control system, the 1E control system realizes the emergency diesel engine safety protection function, and the NC control system realizes the emergency diesel engine control function. In a typical application scheme in the market at present, a relay structure commonly adopted by a 1E control system of an emergency diesel generator set is adopted, and an NC control system adopts a scheme of combining special PLC control with a touch screen.
In a typical scheme of the man-machine interface device, a special PLC acquires generator protection, diesel engine protection, main parameters of a diesel engine and generator parameters, and then transmits the parameters to a touch screen through a bus protocol or a TCP communication protocol to complete monitoring and operation. The NC control system of the diesel engine is the synthesis of a series of automatic system technologies, and can realize the functions of protection, fault alarm, signal transmission, telecontrol and the like. In earlier technical schemes, the functions are usually realized by adopting a plurality of devices respectively, and modules with different functions and numbers are combined by taking the PLC and the touch screen as core components of a control system and can become independent devices by utilizing corresponding software, so that the PLC and the touch screen can replace conventional monitoring instruments, operation control panel cabinets, central signal systems and conventional telecontrol devices. The intelligent control system can complete conventional protection, control, measurement and telemechanical functions, can also provide functions of fault display, historical curve recording and the like, has clearer and simpler information monitoring and operation interfaces, increases software control for preventing misoperation and misoperation, and improves working conditions of operators. The unattended or unattended operation of the centralized control room can be realized, and the operation efficiency is improved.
However, in the scheme of the man-machine interface device, parameters of a 1E control system need to be transmitted to an NC control system through a hardware line and then sent to a touch screen for display through communication, and a large amount of hard wires exist; meanwhile, in order to meet the electrical isolation requirements of high safety level and low safety level, corresponding isolation equipment is required to be added; along with the stricter requirements of the nuclear power industry on an EDG instrument control system, the safety level requirements of a human-computer interface are increased day by day, and a touch screen in the market cannot meet the IEC 62138C functional requirements; the used EDG man-machine interface devices are all foreign products, are not strictly designed according to the industry standard due to human design, and are poor in usability.
The domestic nuclear-grade FirmSys instrument control platform is the first domestic full-digital nuclear-grade instrument control DCS platform, a proprietary communication protocol of the platform provides a digital solution for various instrument control scenes of nuclear power, and in the process of domestic production of the EDG instrument control system, a 1E control system adopts the FirmSys platform, but due to the uniqueness of the platform protocol, touch screens in other markets cannot be accessed simply. Meanwhile, most diesel generator sets work in severe environments such as high temperature, high humidity and the like, the use environment of a large number of HMI touch screens cannot adapt to the extreme environment, the safety level is low, the reliability is poor, EDGs which are applied to domestic nuclear power stations are foreign instrument control systems, the HMI software configuration is maintained, the maintenance is difficult, and the usability is poor.
The utility model discloses in, the man-machine interface device of the emergent diesel engine of nuclear power station mainly solves following technical problem: a) providing a human-computer interface meeting IEC 62138C functional requirements for an EDG instrument control system; b) reducing the number of hard wires of a high safety level (1E) instrument control system and a low safety level (NC) instrument control system; c) and providing a man-machine interface picture meeting the standards of NUREG-0700 and the like in the nuclear power industry. The utility model discloses optimize the improvement to EDG control system human-machine interface, through using domestic nuclear grade firmSys instrument control platform touch-sensitive screen equipment, improve human-machine interface device security level, arrange the touch-sensitive screen at the cabinet body and realize centralized supervision and control, the simultaneous design accords with industry standard's man-machine picture, satisfies the user demand, improves the ease for use.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a be applied to emergent diesel engine's of nuclear power station human-computer interface device, it has solved the not enough problem of human-computer interface device security level.
The technical scheme of the utility model as follows: a man-machine interface device applied to an emergency diesel engine of a nuclear power station comprises: the device comprises a cabinet and a man-machine interface arranged on the cabinet, wherein the man-machine interface consists of a touch screen arranged on the front surface of a shell and an industrial personal computer arranged in the shell; a non-safety control cabinet and a non-safety gateway cabinet; the non-safety control cabinet and the non-safety gateway cabinet are respectively in communication connection with the human-computer interface through a communication network based on reverse redundancy double-ring topology, and the non-safety control cabinet is in communication connection with the safety control cabinet through point-to-point communication and a bus protocol; and the non-safety gateway cabinet is in communication connection with other bus equipment through a bus protocol.
Preferably, the non-safety control cabinet comprises at least two main control boards, MPUA and MPUB, the main control boards are further connected with a switching value IO through hard wiring, and the switching value IO is connected with a switch of the human-computer interface.
Preferably, the inside of the cabinet comprises from top to bottom in sequence: the device comprises a power supply filtering unit, a switching value IO cabinet, an industrial personal computer, a main control cabinet comprising a non-safety control cabinet, a non-safety gateway cabinet and a safety control cabinet, a power supply distribution panel and a photoelectric conversion cabinet.
Preferably, the cabinet is further provided with a button and an indicator lamp below the touch screen.
Preferably, 5V power supply modules are further arranged on two sides of the industrial personal computer inside the cabinet.
Preferably, the height of the man-machine interface arranged on the cabinet is 1300mm-1700 mm.
Preferably, the touch screen has a display of the size of letters, numbers, symbols and color attribute settings.
Preferably, the touch screen display has a flow chart monitoring function design, and the flow chart is composed of a background, static display elements and dynamic display elements.
Preferably, the touch screen displays a device control function design function, provides a picture to realize the device control function, and pops up an operation panel window of the device by clicking a relevant icon in the flow chart.
Preferably, the touch screen (21) is centrally located on an upper portion of the front face of the housing.
The utility model discloses following beneficial effect has:
the utility model provides a man-machine interface device for nuclear power station emergency diesel engine can provide the man-machine interface that satisfies IEC 62138C class functional requirement for EDG instrument control system, has improved the reliability of man-machine interface device; the adopted ring network technology reduces the number of hard wires of the high-level and low-level safety instrument control systems, increases the display range and easiness of system parameters, and improves the maintainability of the system; a set of human-computer interface pictures meeting the standards of the nuclear power industry GB/T12985, NUREG-0700 and the like is designed, and the usability of the human-computer interface is improved.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of the EDG human-machine interface structure of the present invention;
FIG. 2 is a schematic diagram of the interface of the human interface device of the present invention;
fig. 3 is a schematic diagram of the arrangement of the man-machine interface of the emergency diesel engine of the present invention;
FIG. 4 is a schematic diagram of SCID300 stadia analysis of the present invention;
reference numerals: 1, a cabinet; 2-a human-machine interface; 21-a touch screen; 22-an industrial personal computer; 3-a non-safety control cabinet; 4-non-security level gateway cabinets; 5-a safety level control cabinet; 221-a switch; 11-a power supply filtering unit; 12-switching value IO chassis; 14-a master control chassis; 15-power distribution panel; 16-a photoelectric conversion chassis; a 222-5V power supply module; 6-other bus devices.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art based on these embodiments are all included in the scope of the present invention.
Referring to fig. 1, the utility model provides a man-machine interface device for emergency diesel engine of nuclear power station,
comprises the following steps: the device comprises a cabinet 1 and a man-machine interface 2 arranged on the cabinet 1, wherein the man-machine interface 2 consists of a touch screen 21 arranged on the front surface of a shell and an industrial personal computer 22 arranged inside the shell; a non-safety level control cabinet 3 and a non-safety level gateway cabinet 4; the non-safety control cabinet 3 and the non-safety gateway cabinet 4 are respectively in communication connection with the human-computer interface 2 through a communication network based on a reverse redundancy double-ring topology, and the non-safety control cabinet 3 is in communication connection with the safety control cabinet 5 through point-to-point communication and a bus protocol; the non-safety gateway cabinet 4 is in communication connection with other bus devices through a bus protocol.
Preferably, the non-safety control cabinet 3 includes at least two main control boards, MPUA and MPUB, and the main control boards are further connected with a switching value IO through a hard wire, and the switching value IO is connected with the switch 221 of the human-computer interface.
Preferably, the inside of the cabinet 1 sequentially includes from top to bottom: the device comprises a power supply filtering unit 11, a switching value IO cabinet 12, an industrial personal computer 22, a main control cabinet 14 comprising a non-safety control cabinet 3, a non-safety gateway cabinet 4 and a safety control cabinet 5, a power supply distribution panel 15 and a photoelectric conversion cabinet 16.
Preferably, the cabinet 1 is further provided with a button and an indicator light below the touch screen 21.
Preferably, a 5V power module 222 is further disposed inside the cabinet 1 on two sides of the industrial personal computer 22.
Preferably, the height of the human-machine interface 2 arranged on the cabinet 1 is 1300mm-1700 mm.
Preferably, the touch screen 21 displays attribute settings such as letters, numbers, sizes of symbols, colors, and the like.
Preferably, the touch screen 21 displays a flowchart monitoring function design, and the flowchart is composed of three parts, namely a background, a static display element and a dynamic display element.
Preferably, the touch screen 21 displays a device control function design function, provides a screen to implement a device control function, and pops up an operation panel window by clicking a relevant icon in the flowchart.
Preferably, the touch screen 21 is located centrally on the upper portion of the front face of the housing.
The Emergency Diesel Generator (EDG) instrument control system function distribution served by the man-machine interface device for the emergency diesel engine of the nuclear power station is realized by 3 machine cabinets, namely a safety control cabinet (1E control cabinet), a non-safety control cabinet (NC control cabinet) and a non-safety gateway cabinet (NC gateway cabinet). The 1E control cabinet realizes the safety protection function of the emergency diesel engine, and the NC control cabinet realizes the control function of the emergency diesel engine; the NC gateway cabinet is mainly used for communication with other instrument control systems, receives Profibus DP communication data of field bus equipment and then sends the Profibus DP communication data to the NC control cabinet. The 1E control cabinet, the NC control cabinet and the NC gateway cabinet are all realized by a FirmSys platform. The utility model provides a man-machine interface device provides the operating window for realizing nuclear power station EDG control function, carries out data interaction through the communication, and man-machine interface schematic structure is shown in FIG. 1 in EDG appearance control system.
The utility model discloses well human-computer interface device adopts safety control display device SCID300 to realize, and SCID300 is for studying safety display system certainly, and it develops for the security level system, also can be arranged in the non-security level system, and SCID300 comprises SCID300 host computer (it contains 4U machine case, power module, master control integrated circuit board, communication processing board, serial ports expansion board), touch-screen display ware and external installation auxiliary. The method supports a FirmNet ring network communication mode to access a full-digital FirmSys instrument control platform, and solves the problem that other touch screen devices cannot access a high-grade digital instrument control platform; and the 1E control system and the NC control system adopt a point-to-point communication mode, so that excessive hard wiring is avoided, and electrical isolation equipment is reduced. SCID300 is based on a QNX operating system, the development of the SCID300 meets IEC 61508 SIL3 certification requirements, the SCID300 is widely applied to a nuclear power plant instrument control system, EMC design of equipment meets IEC61000 requirements, software design meets IEC 62138C function requirements, and a human-computer interface device meets the high-safety-level use requirements of an EDG human-computer interface based on a high-level SCID 300. The emergency diesel engine local equipment is still provided by partial equipment or foreign suppliers, data are transmitted in a field bus communication mode, a man-machine interface is required to be provided with a communication interface for accessing other systems and field bus equipment, the other systems generally use a standard TCP/IP protocol in the industry, and a firmSys platform is provided with access supporting the type of protocol; to the field bus communication protocol type, the FirmSys platform does not support the direct access temporarily, consequently is in the utility model discloses in used the protocol conversion mode, adopted ripe protocol conversion module on the market, convert bus communication protocol data to standard TCP/IP communication protocol data, insert the FirmSys platform looped netowrk again through gateway system (GW), SCID300 obtains the information of field bus equipment from the looped netowrk, this man-machine interface device can solve bus equipment's data display problem.
The touch screen device (SCID300 touch screen) used in the man-machine interface is arranged on the front surface of an NC control cabinet, and the SCID300 access system bus receives other system signals transmitted by the NC control cabinet and the NC gateway cabinet and signals provided by field bus equipment to complete local display and alarm recording of related alarm and operation parameters. Human interface device communication interface as shown in figure 2 and human interface device placement in a cabinet as shown in figure 3. The installation arrangement of the main control cabinet of the display device SCID300 in the man-machine interface takes GB10000 data as a reference, and the accessibility, the display visual angle and the like of the main control cabinet are designed according to the GB/T12985 general rule. The attribute settings of letters, numbers, sizes of symbols, colors and the like on the SCID300 touch screen meet the human factor requirements of NUREG-0700 on screen display. The man-machine interface device has the following functions, and it should be emphasized that the present invention is only required to protect the shape and structure of the man-machine interface device, and the following methods or functional records and carrier programs may be mentioned only for explaining the overall principle and function of the man-machine interface device, which are not described in the claims, but not the claimed content of the present invention:
1) character design
Generally, the accurate operation area is an optimal display area for operation in front of the vertical screen, the distance between an eye and a vertical screen surface is set to be 400mm according to the size of a 50 th percentile man (determined by adding shoe height), the observation distance between the eye and the vertical screen is comprehensively considered, the upper limit of the size of the accurate operation area is determined according to the height above a horizontal limit of 15 degrees, the lower limit of the size of the accurate operation area is determined according to the position below a horizontal line of 30 degrees, the size range of the accurate operation area is 1350 mm-1690 mm, and the SCID300 touch screen is arranged on the front face of the cabinet to be 1300mm-1700 mm. According to the trigonometric function relation, the relation between the minimum visual angle MA, the visual distance D and the Height H is 6.283D (MA)/21600. The view distance of the SCID300 touch screen is calculated according to the arrangement height of the cabinet of the SCID300 main control cabinet, as shown in FIG. 4, the minimum word height is calculated according to the maximum view distance, and the size of the characters used in the picture of the SCID300 touch screen meets the requirement of the range.
2) Flow chart monitoring function design
The navigation bar of the man-machine interaction device provides a navigation entry of a flow chart menu page so that an operator can enter the flow chart menu page at any time. Clicking a 'flow chart' button to enter a flow chart menu page, wherein the flow chart menu page lists the name of the flow chart of each system, the flow chart consists of a background, a static display element and a dynamic display element, and the picture design of the flow chart meets the artificial design requirements of NUREG-0700 standard on letters, numbers, symbol sizes, colors and the like.
3) Design of device control function
The SCID300 man-machine interface device provides pictures to realize the control function of the equipment, and an operation panel window is popped up by clicking related icons in a flow chart, wherein the panel design meets the human factor requirement of NUREG-0700 on a soft operation panel.
4) SCID300 alarm function design
The alarm system provides three types of process alarm, temporary alarm and I & C fault, and the picture design meets the human factor requirements of NUREG-0700 on screen display. And (3) process alarm: the off-line configuration software is used for defining alarm parameters (analog quantity alarm limit value/alarm level, switching value alarm attribute, alarm level and the like), and the system carries out alarm judgment and processing according to the configuration alarm parameters during on-line operation. And (4) temporary alarming: when the system is operated on line, the alarm generated by temporarily defining alarm parameters by an operator is called a temporary alarm. I & C failure: and (4) storing the related equipment faults of the instrument control system.
The human-computer interface can provide a high-security-level human-computer interface for an EDG instrument control system, the touch screen used by the human-computer interface device is an SCID300 touch screen, and the human-computer interface device is a self-research security display system and has the functions of parameter display, data recording, trend display and alarm; the method combines the functions and performance requirements of the emergency diesel engine, and through design and verification, the man-machine interface device meets the application requirements of the C-type functions of the diesel engine of the nuclear power station, and is accessed into a system bus network based on the FirmNet ring network technology, and each control station is accessed into a ring network, so that the SCID300 man-machine interface device can conveniently display and control field signals. The high safety level of a nuclear power station protection system is met, and meanwhile, a man-machine interface with rich functions is provided to be accessed into a nuclear-level full-digital instrument control system.
The man-machine interface device can reduce the number of hard wires of high-level and low-level safety instrument control systems, the man-machine interface can conveniently acquire data based on a FirmSys platform control station, and also can acquire data of other platforms or bus equipment through a gateway station access looped network, the gateway station supports standard UDP or Modbus-TCP protocol access data, if other bus type data exist, the gateway station can also be accessed through a conversion module, other protocol types are converted into the platform support standard protocol and then sent to the gateway station, the field bus equipment data can be transmitted to the man-machine interface to be displayed and recorded through the above mode, and various processes or instrument control signals needing to be monitored on site can be solved based on the above mode. In the past, a 1E instrument control system and an NC instrument control system need to realize communication through a large amount of hard wiring and isolation equipment, and based on a FirmNet network technology and a gateway communication processing scheme, the field 1E instrument control system can be sent to the NC instrument control system through a point-to-point network and then sent to a human-computer interface device through the FirmNet network for display; and for the bus equipment, signals are collected through the gateway station and then are sent to the human-computer interface device through the FirmNet network. The application of the FirmNet network technology reduces the number of hardware line interfaces and improves the cabinet arrangement space and the maintainability in the later period.
The human-computer interface device can provide a human-computer interface picture meeting nuclear power standards, a human-computer interface meeting standing posture operation is designed according to the related standard requirements of nuclear power GB/T12985, and the SCID300 for monitoring and operating meets the requirements of accessibility, operability, visibility and the like within the comfortable range of an operator; the function and picture design meet the requirements of users, and the designs of letters, numbers, symbol sizes, colors and the like in the picture design meet the requirements of the nuclear power plant NUREG-0700 standard on human factors.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art. The above list of detailed descriptions is only for the specific description of the feasible embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present invention should be included within the scope of the present invention.
Claims (10)
1. A man-machine interface device applied to an emergency diesel engine of a nuclear power station is characterized by comprising: the intelligent cabinet comprises a cabinet (1) and a man-machine interface (2) arranged on the cabinet (1), wherein the man-machine interface (2) consists of a touch screen (21) arranged on the front surface of a shell and an industrial personal computer (22) arranged in the shell; a non-safety level control cabinet (3) and a non-safety level gateway cabinet (4); the non-safety-level control cabinet (3) and the non-safety-level gateway cabinet (4) are in communication connection with the human-computer interface (2) through a communication network based on a reverse redundancy double-ring topology respectively, and the non-safety-level control cabinet (3) is in communication connection with the safety-level control cabinet (5) through point-to-point communication and a bus protocol; the non-safety gateway cabinet (4) is in communication connection with other bus equipment (6) through a bus protocol.
2. The human-computer interface device applied to the emergency diesel engine of the nuclear power station as claimed in claim 1, wherein the non-safety control cabinet (3) comprises at least two main control boards MPUA and MPUB, the main control boards are further connected with a switching value IO cabinet through hard wiring, and the switching value IO is connected with a switch (221) of the human-computer interface.
3. The human-machine interface device applied to the emergency diesel engine of the nuclear power station as claimed in claim 2, wherein the interior of the cabinet (1) comprises, from top to bottom: the device comprises a power supply filtering unit (11), a switching value IO cabinet (12), an industrial personal computer (22), a main control cabinet (14) comprising a non-safety control cabinet (3), a non-safety gateway cabinet (4) and a safety control cabinet (5), a power supply distribution panel (15) and a photoelectric conversion cabinet (16).
4. The human-computer interface device applied to the emergency diesel engine of the nuclear power station is characterized in that the cabinet (1) is further provided with a button and an indicator lamp below the touch screen (21).
5. The human-computer interface device applied to the emergency diesel engine of the nuclear power station as claimed in claim 4, wherein 5V power supply modules (222) are further arranged inside the cabinet (1) on two sides of the industrial personal computer (22).
6. The human-machine interface device applied to the emergency diesel engine of the nuclear power station is characterized in that the human-machine interface (2) is arranged between 1300mm and 1700mm in the height of the cabinet (1).
7. The human-machine interface device applied to the emergency diesel engine of the nuclear power plant as claimed in claim 6, characterized in that said touch screen (21) has a display of the size and color attribute settings of letters, numbers, symbols.
8. The human-computer interface device applied to the emergency diesel engine of the nuclear power station is characterized in that the touch screen (21) displays a flow chart monitoring function design, and the flow chart is composed of a background, a static display element and a dynamic display element.
9. The human-computer interface device applied to the emergency diesel engine of the nuclear power plant is characterized in that the touch screen (21) displays equipment control functions.
10. The human-computer interface device applied to the emergency diesel engine of the nuclear power plant as claimed in claim 9, wherein the touch screen (21) is located at the upper part of the front surface of the shell and is arranged in the middle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220626981.0U CN217061462U (en) | 2022-03-22 | 2022-03-22 | Man-machine interface device applied to emergency diesel engine of nuclear power station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220626981.0U CN217061462U (en) | 2022-03-22 | 2022-03-22 | Man-machine interface device applied to emergency diesel engine of nuclear power station |
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