CN220340555U - Dual-redundancy switching system - Google Patents
Dual-redundancy switching system Download PDFInfo
- Publication number
- CN220340555U CN220340555U CN202321655272.6U CN202321655272U CN220340555U CN 220340555 U CN220340555 U CN 220340555U CN 202321655272 U CN202321655272 U CN 202321655272U CN 220340555 U CN220340555 U CN 220340555U
- Authority
- CN
- China
- Prior art keywords
- controller
- dual
- switching
- slave
- gateway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000009977 dual effect Effects 0.000 claims abstract description 61
- 238000012544 monitoring process Methods 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims abstract description 10
- 239000000306 component Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 3
- 101150008604 CAN1 gene Proteins 0.000 description 2
- 101100058989 Candida albicans (strain SC5314 / ATCC MYA-2876) CAN3 gene Proteins 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 101150063504 CAN2 gene Proteins 0.000 description 1
- 101000879675 Streptomyces lavendulae Subtilisin inhibitor-like protein 4 Proteins 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
Landscapes
- Safety Devices In Control Systems (AREA)
Abstract
The utility model discloses a dual redundancy switching system, which comprises: a first controller including a first master and a first slave; the second controller comprises a second host and a second slave; the first controller and the second controller are connected with a dual redundancy switcher through a serial port, and the on-off of an external interface of the dual redundancy switcher is switched through the on-off of an internal relay of the dual redundancy switcher; the first host, the second host, the first slave and the second slave are connected with an interlocking I system and an interlocking II system through a gateway A or a gateway B; the monitoring CPU of the first controller and the monitoring CPU of the second controller are in communication connection with the gateway A and the gateway B through the CAN communication module, and the gateway A and the gateway B are connected with the monitoring machine.
Description
Technical Field
The utility model relates to the technical field of computer interlocking systems, in particular to a dual-redundancy switching system.
Background
In recent years, the development of automatic control technology of railway stations is rapid, and the core components such as an interlocking operation computer, interlocking software logic, a driving execution circuit and the like which form the control system are greatly developed and promoted. The domestic railway industry gradually advances to the localization direction on the basis of actively introducing foreign advanced technology. Meanwhile, the requirements of the railway department on the safety, reliability, availability and maintainability of the computer interlocking system are gradually improved, and the provision that the safety perfection level of the computer interlocking system reaches SIL4 level is explicitly provided. Computers running core interlock software are no longer general industrial computers, and have been upgraded to specialized computer platforms with fail-safe features, with two-by-two, three-by-two, etc. of the predominant systems. Domestic railways mainly adopt two systems.
In order to ensure safe and reliable operation of the computer interlocking system, the development trend of the drive execution circuit from a relay type circuit to an electronic execution circuit appears, so that the upgrading of the electronic execution unit to a double-redundancy structure is a problem to be solved at present.
Disclosure of Invention
In order to solve the above technical problems, the present utility model provides a dual redundancy switching system, including: a first controller including a first master and a first slave; the second controller comprises a second host and a second slave; the first controller and the second controller are connected with a dual redundancy switcher through a serial port, and the on-off of an external interface of the dual redundancy switcher is switched through the on-off of an internal relay of the dual redundancy switcher; the first host, the second host, the first slave and the second slave are connected with an interlocking I system and an interlocking II system through a gateway A or a gateway B; the monitoring CPU of the first controller and the monitoring CPU of the second controller are in communication connection with the gateway A and the gateway B through the CAN communication module, and the gateway A and the gateway B are connected with the monitoring machine.
Preferably: the first host computer is connected with the first slave computer through a first SPI component, and the first SPI component outputs the information collected by the host computer and the first slave computer to the switching board through a serial port after the information collected by the host computer and the information collected by the first slave computer are consistent.
Preferably: the second host computer is connected with the second slave computer through a second SPI component, and the second SPI component outputs the information collected by the second host computer and the information collected by the second slave computer to the switching board through a serial port after the information collected by the second host computer and the information collected by the second slave computer are consistent.
Preferably: the switching board is installed inside the dual redundancy switch.
Preferably: the switching board includes: a power supply connected with the processor; the processor is connected with a signal transceiver and a collector; the collector is also connected with a first controller and a second controller, and the switching plate collects information sent by the first controller and the second controller through the collector; and the driver is connected with the processor and used for receiving and executing the control information of the processor and switching the working mode of the first controller or the second controller.
Preferably: the switch board is provided with a plurality of, is track module dual redundancy switch board, signal module dual redundancy switch board, switch module dual redundancy switch board and scattered module dual redundancy switch board respectively.
Preferably: the track module dual redundancy switching board includes a plurality of 3a3b relays, through which 3a3b relays a rail face voltage is connected to the first and second hosts.
Preferably: the signal module dual redundancy switching board comprises two 3a3b relays, and is connected with an outdoor signal machine through the 3a3b relays.
Preferably: the switch module double-redundancy switching board comprises three 3a3b relays, a starting loop and a representation loop are connected to the first host and the second host through the 3a3b relays, and the switch module double-redundancy switching board is further connected with an outdoor switching machine.
Preferably: and the scattered module double-redundancy switching plate is connected with normally open nodes for collecting and outputting the scattered modules in the first controller and the second controller in parallel and is used for switching the normally closed nodes.
The utility model has the technical effects and advantages that:
the dual-redundancy switcher plays a role of a voter, receives the state, fault, current data and other related information of the first controller and the second controller through the serial port, carries out logic operation through the processor of the dual-redundancy switcher, makes master-slave judgment on the dual-redundancy switching system, sends master-slave information to the first controller and the second controller through the serial port respectively, cuts off the connection between the first controller or the second controller serving as secondary output and the outside, and only enables the first controller or the second controller serving as primary output to output corresponding information.
Drawings
Fig. 1 is a schematic structural diagram of a dual redundancy switching system according to an embodiment of the present application;
fig. 2 is a schematic connection diagram of a track module dual redundancy switch board according to an embodiment of the present disclosure;
fig. 3 is a schematic connection diagram of a dual redundancy switch board of a signal module according to an embodiment of the present application;
fig. 4 is a schematic connection diagram of a switch module dual redundancy switching board according to an embodiment of the present application;
fig. 5 is a schematic connection diagram of a scattered module dual redundancy switch board according to an embodiment of the present application.
In the figure:
1. a first controller; 2. a second controller; 3. a dual redundancy switch; 101. a first host; 102. a first slave; 201. a first host; 202. a first slave.
Detailed Description
The utility model will be described in further detail with reference to the drawings and the detailed description. The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.
Referring to fig. 1-5, in this embodiment, a dual redundancy switching system is provided, which includes: a first controller 1 and a second controller 2, the first controller 1 including a first master 101 and a first slave 102, the second controller 2 including a second master 201 and a second slave 202; the first controller 1 and the second controller 2 are connected with a double redundancy switcher 3 through serial ports, and the working states of all modules in the first controller 1 and the second controller 2 are controlled through the double redundancy switcher 3; the first host 101, the second host 201, the first slave 102 and the second slave 202 are connected with an interlocking I system and an interlocking II system through a gateway A or a gateway B; the monitoring CPU of the first controller 1 and the second controller 2 are in communication connection with the gateway a and the gateway B through a CAN communication module, and the gateway a and the gateway B are connected with a monitor, in this embodiment, the first host 101 and the second host 102 are connected with the gateway a through CAN1 and the gateway B, the first slave 201 and the second slave 202 are connected with the gateway a through CAN3 and are connected with the gateway B through CAN4, the gateway a is connected with an opening a of the interlock I and an opening a of the interlock II, the gateway B is connected with an opening B of the interlock I and the interlock II, the monitoring CPU of the first controller 1 and the second controller 2 sends module information to the gateway a and the gateway B through a CAN communication mode, and the gateway a and the gateway B select one to send the monitoring information to the monitor through dialing codes; the dual redundancy switch 3 functions as a voter, the dual redundancy switch 3 receives the state, fault, current data and other related information of the first controller 1 and the second controller 2 through the serial port, carries out logic operation through the processor of the dual redundancy switch 3, makes master-slave judgment on the dual redundancy switch system, sends master-slave information to the first controller 1 and the second controller 2 through the serial port respectively, cuts off the connection between the first controller 1 or the second controller 2 serving as secondary output and the outside through the internal relay, and only enables the first controller 1 or the second controller 2 serving as primary output to output corresponding information.
The first host 101 and the first slave 102 are connected through a first SPI component, the first SPI component outputs information collected by the first host and the first slave 102 to the switch board through a serial port after the information collected by the first host and the first slave 102 are consistent, the second host 201 and the second slave 202 are connected through a second SPI component, the second SPI component outputs information collected by the second host 201 and the second slave 202 to the switch board through a serial port after the information collected by the second host 201 and the second slave 202 are consistent, the interlocking I sends a request or a control command to the gateway A, the gateway A forwards the request information and the control command issued by the interlocking I, the host of the first controller 1 or the second controller 2 receives related data forwarded by the gateway A through the CAN1, the slave receives related data forwarded by the gateway A through the CAN3, the interlocking command of the master and the slave analyzes the operation result and outputs the operation result through the SPI; the interlocking II system sends a request or a control command to the gateway B, the gateway B forwards the request information and the control command issued by the interlocking II system, the host of the first controller 1 or the second controller 2 receives related data forwarded by the gateway B through the CAN2, the slave receives related data forwarded by the gateway B through the CAN4, the master and slave analyzes the interlocking command, and the operation result is output consistently through SPI comparison.
The two control boards of the first controller 1 and the second controller 2 correspond to the same execution object, for example: the method comprises the steps that the first controller 1 or the second controller 2 receives a request or control command information issued by an interlocking machine through a host of the first controller 1 or the second controller 2, but only the host can upload state information of an execution object, because a dual redundancy switching system does not know own master-slave state when power is on, the dual redundancy switching system is required to judge master-slave states of two modules of the first controller 1 and the second controller 2 at the moment, master-slave information is sent to the first controller 1 and the second controller 2 through serial ports, when the first controller 1 and the second controller 2 know own working modes, namely the master working mode and the slave working mode, the first controller 1 or the second controller 2 serving as main output uploads the state information to the interlocking machine and drives related circuits to send out a representation, and meanwhile, the dual redundancy switching system 3 cuts off the first controller 1 or the second controller 2 serving as secondary output and an outdoor interlocking device interface, and the outdoor interlocking device comprises the switch, signals, the tracks and various scattered modules; the communication between the dual redundancy switch 3 and the first controller 1 and the second controller 2 is real-time, and once the dual redundancy switch 3 finds that the first controller 1 or the second controller 2 as the primary output is abnormal, the first controller 1 or the second controller 2 as the secondary output will replace the first controller 1 or the second controller 2 as the primary output in a short time, and the function of the primary output is fully realized.
The dual redundancy switch 3 is internally installed with a plurality of switch boards, in this embodiment, a track module dual redundancy switch board, a signal module dual redundancy switch board, a switch module dual redundancy switch board, and a scattered module dual redundancy switch board.
Each switching board comprises a power supply, a connecting processor, a signal transceiver and a collector, wherein the collector is further connected with the first controller 1 and the second controller 2, the switching board collects information sent by the first controller 1 and the second controller 2 through the collector, and the driver is connected with the processor and is used for receiving and executing control information of the processor and switching the working mode of the first controller 1 or the second controller 2.
The track module connected by the track module double redundancy switching board is divided into 480 track modules and 25HZ track modules, the 480 track modules are generally used on non-electrified track sections, the 25HZ track modules are generally used on alternating-current electrified track sections, the track module switching board is used for cutting off the connection between the first controller 1 or the second controller 2 serving as secondary output and outdoor track voltage, switching on the first controller 1 or the second controller 2 serving as primary output, and sending state information of the first controller 1 or the second controller 2 serving as primary output to the first controller 1 or the second controller 2 serving as secondary output, and synchronizing master-slave module states; the 480 track module can collect two track voltages at the same time, the first path of the collection interface is collected as AGQ (23-12) and AGH (23-13), the second path of the collection interface is collected as BGQ (23-15) and BGH (23-16), the track module double redundancy switching board connects the track surface voltage to the first controller 1 or the second controller 2 serving as main output through two 3a3b relays, and the first controller 1 or the second controller 2 serving as secondary output is in an off state. The first controller 1 or the second controller 2 as the main output judges the track state by collecting the track surface voltage, and uploads the state information to the interlocking machine, and the first controller 1 or the second controller 2 as the secondary output synchronizes the state information of the first controller 1 or the second controller 2 as the main output and sends the state information to the first controller 1 or the second controller 2 as the main output though the track module double-redundancy switching board though the first controller 1 or the second controller 2 as the secondary output does not collect the track surface voltage; YL1H (23-1) and YL1Q (24-1), YL2H (23-2) and YL2Q (24-2), YL3H (23-3) and YL3Q (24-3) are reserved state information acquisition points for the first path track, YL4H (23-4) and YL4Q (24-4), YL5H (23-5) and YL5Q (24-5), YL6H (23-6) and YL6Q (24-6) are reserved state information acquisition points for the second path track, and a parallel relation is formed between the state information acquisition points and the switching boards, namely, no matter which of the first controller 1 and the second controller 2 has output, the execution objects corresponding to the track module dual-redundancy switching boards have output.
The 25HZ track module can control two tracks simultaneously, but the acquisition and 480 tracks are slightly different, the track module is used for acquiring the track surface voltage and also acquiring local voltage, the first track surface voltage of the acquisition interface is acquired as AG+ (23-15), AG- (23-16), BG+ (23-13) and the second track surface voltage is acquired as BG- (23-14), the first track local voltage is acquired as AG-110+ (23-10), AG-110- (23-11), the second track local voltage is acquired as BG-110+ (23-8) and BG-110- (23-9), and the track module dual redundancy switching board is used for connecting the track surface voltage to the first controller 1 or the second controller 2 serving as a main output through three 3a3b relays, and the first controller 1 or the second controller 2 serving as a secondary output is in a disconnected state, wherein the local power supply is collinear and does not need to be disconnected. The host machine judges the track state by collecting the track surface voltage and the local power supply, and uploads the state information to the interlocking machine, and the first controller 1 or the second controller 2 serving as secondary output is not used for collecting the track surface voltage, but the state information of the host machine is synchronized by sending the track surface voltage to the first controller 1 or the second controller 2 serving as primary output through the track module double-redundancy switching plate; reserved track state information acquisition points (YL 1-YL 6) are identical to track 480.
The signal module double-redundancy switching board is mainly used for controlling an outdoor signal machine and is suitable for various signal modules such as shunting, three-display, station entering and station exiting; the control command issued by the interlocking machine is received to drive the corresponding relay to point the outdoor annunciator, and the signal module double-redundancy switching board controls the connection of the first controller 1 or the second controller 2 and the outdoor annunciator by switching the lighting power supply sent to the outdoor annunciator; the lighting power supply of the signal module is X1-1 (24-2), X1-2 (23-2), X2-1 (24-9), X2-2 (23-9), the switching board connects the lighting power supply to the first controller 1 or the second controller 2 as the main output through two 3a3b relays, the first controller 1 or the second controller 2 as the secondary output is in an off state, the first controller 1 or the second controller 2 as the main output sends out lighting voltage through the signal module dual redundancy switching board, the corresponding signal lamp is lighted, and the first controller 1 or the second controller 2 as the secondary output is in an off state, but the state of the first controller 1 or the second controller 2 as the main output is sent to the first controller 1 or the second controller 2 as the main output through the signal module dual redundancy switching board, and the state information of the first controller 1 or the second controller 2 as the secondary output is synchronized.
The controlled object of the switch module double redundancy switching board is: the main functions of the four-wire or six-wire direct current switch machine are to control the action of the outdoor switch machine and collect the state of the switch machine; the switch module double redundancy switching board controls the connection of the switch module and the outdoor switch machine by switching X1-X6; the connection between the switch module double-redundancy switching board and the outdoor equipment is X1-X6, the switch module double-redundancy switching board comprises a starting loop and a representation loop, the action power DJZ (24-2) and the DJF (24-8) are connected in parallel, and the representation power BJZ (24-4), the BJF (24-6) and the switch module double-redundancy switching board are connected in parallel, namely the two power sources which can be acquired no matter how the master-slave state of the first controller 1 and the second controller 2 is switched; the switch module double redundancy switching board connects the start loop and the representation loop X1 (24-10), X2 (24-12), X3 (24-14), X4 (24-16), X5 (24-11), X6 (24-13) to the first controller 1 or the second controller 2 as the main output through three 3a3b relays, and the first controller 1 or the second controller 2 as the secondary output is in an off state. The first controller 1 or the second controller 2 as the primary output is connected with the outdoor switch machine through the switch module double redundancy switching board, drives the switch machine to operate, acquires the state indicated by the switch machine, and synchronizes the state information of the first controller 1 or the second controller 2 as the secondary output though the first controller 1 or the second controller 2 as the primary output is in the disconnection state.
The scattered module double-redundancy switching board comprises two paths of acquisition and two paths of output and is commonly used for various contact electricity such as a 64D semi-automatic circuit, a road junction notification circuit, a simple illumination checking circuit, a filament alarm circuit and the like; the normally open nodes and the switching boards of the scattered module double-redundancy switching board acquisition and output are connected in parallel, namely, as long as the scattered module double-redundancy switching board acquisition is carried out, the first controller 1 and the second controller 2 are all acquired, one of the first controller 1 and the second controller 2 mainly has output, and the output is sent out through the normally open point, the scattered module double-redundancy switching board has output; however, if the output is sent out through the normally closed point of the module, the output is sent out through the switching of the scattered module double redundancy switching board, the scattered module double redundancy switching board connects the outdoor cable with the first controller 1 or the second controller 2 as the main output through the switching, the first controller 1 or the second controller 2 as the main output outputs the voltage, the first controller 1 or the second controller 2 as the secondary output is disconnected, and the state of the first controller 1 or the second controller 2 as the main output sent to the scattered module double redundancy switching board through the switching board is synchronized with the state information of the scattered module double redundancy switching board.
It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present utility model without the inventive step, are intended to be within the scope of the present utility model. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.
Claims (9)
1. A dual redundancy switching system, comprising:
a first controller (1) comprising a first master (101) and a first slave (102);
a second controller (2) including a second master (201) and a second slave (202);
the first controller (1) and the second controller (2) are connected with a dual redundancy switcher (3) through serial ports, and the on-off of an external interface of the dual redundancy switcher (3) is switched through the on-off of an internal relay of the dual redundancy switcher (3);
the first host (101), the second host (201), the first slave (102) and the second slave (202) are connected with an interlocking I system and an interlocking I I system through a gateway A or a gateway B;
the monitoring CPU of the first controller (1) and the second controller (2) are in communication connection with the gateway A and the gateway B through the CAN communication module, and the gateway A and the gateway B are connected with the monitoring machine.
2. A dual redundancy switching system according to claim 1, characterized in that the dual redundancy switch (3) has a switching board mounted inside; the first host computer (101) and the first slave computer (102) are connected through a first SPI component, and the first SPI component outputs the information collected by the first host computer (101) and the information collected by the first slave computer (102) to the switching board through a serial port after the information is relatively consistent.
3. The dual redundancy switching system according to claim 2, wherein the second master (201) and the second slave (202) are connected through a second SPI component, and the second SPI component outputs the information collected by the second master (201) and the second slave (202) to the switching board through a serial port after comparing the information with each other.
4. A dual redundant switching system according to claim 3 wherein the switching board comprises:
a power supply connected with the processor;
the processor is connected with a signal transceiver and a collector;
the collector is also connected with a first controller (1) and a second controller (2), and the switching board collects information sent by the first controller (1) and the second controller (2) through the collector;
and the driver is connected with the processor and used for receiving and executing the control information of the processor and switching the working mode of the first controller (1) or the second controller (2).
5. The dual redundant switching system of claim 4, wherein the plurality of switching boards is a track module dual redundant switching board, a signal module dual redundant switching board, a switch module dual redundant switching board, and a scattered module dual redundant switching board, respectively.
6. A dual redundant switching system according to claim 5, characterized in that the track module dual redundant switching board comprises a plurality of 3a3b relays, through which 3a3b relays the rail face voltage is connected to the first controller (1) or the second controller (2).
7. The dual redundancy switching system of claim 6, wherein the signal module dual redundancy switching board comprises two 3a3b relays, and the outdoor signal is connected through the 3a3b relays.
8. The dual redundancy switching system of claim 7, wherein the switch module dual redundancy switching board includes three of the 3a3b relays, and the start loop and the indication loop are connected to the first controller (1) or the second controller (2) through the 3a3b relays, and the switch module dual redundancy switching board is further connected to an outdoor switching machine.
9. The dual redundancy switching system of claim 8, wherein the scattered module dual redundancy switching board is connected in parallel with normally open nodes of collection and output of scattered modules in the first controller (1) and the second controller (2) for switching normally closed nodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321655272.6U CN220340555U (en) | 2023-06-28 | 2023-06-28 | Dual-redundancy switching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321655272.6U CN220340555U (en) | 2023-06-28 | 2023-06-28 | Dual-redundancy switching system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220340555U true CN220340555U (en) | 2024-01-12 |
Family
ID=89448016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321655272.6U Active CN220340555U (en) | 2023-06-28 | 2023-06-28 | Dual-redundancy switching system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220340555U (en) |
-
2023
- 2023-06-28 CN CN202321655272.6U patent/CN220340555U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107992382B (en) | Computer interlocking system and redundancy switching method thereof | |
| CN105187248B (en) | A kind of redundancy switching system | |
| CN102193543B (en) | Control system based on profibus redundant network topological structure and switching method of control system | |
| CN109677468A (en) | Train logic control element and logic control method | |
| CN110376876B (en) | Double-system synchronous safety computer platform | |
| CN203027276U (en) | Dual-machine hot standby platform | |
| CN112693495B (en) | Node-free distributed turnout safety driving control system | |
| CN111186463A (en) | Board-level redundant full-electronic computer interlocking system | |
| CN108974048A (en) | Railway switch trackside control device and method | |
| CN102749890B (en) | Redundancy method for DCS (distributed control system) control module | |
| CN102707678B (en) | Input/output workstation of track traffic vehicle network system | |
| CN103176870B (en) | Multi-mode information interaction redundancy safety computer platform | |
| CN101634855B (en) | Redundancy backup control system of ground equipment for opening ceremony and closing ceremony of large-scale games | |
| CN107386868A (en) | A kind of modular control apparatus for platform door system | |
| WO2022100232A1 (en) | Distributed-type on-board safety computer system | |
| CN111186464A (en) | Full electronic computer interlocking system based on switching button | |
| CN112977549A (en) | Distributed computer interlocking system and control method thereof | |
| CN209813737U (en) | Magnetic-levitation train and levitation control system and controller thereof | |
| CN220340555U (en) | Dual-redundancy switching system | |
| CN108536046A (en) | Main control unit switching method and locomotive communication equipment for locomotive communication equipment | |
| CN101714776B (en) | 10KV station electric control system of convertor station adopting selecting 2 from 3 logic | |
| CN213149533U (en) | Hardware two-out-of-three voting circuit and train LCU control system | |
| CN210852481U (en) | Electronic five-wire system turnout control device | |
| CN113485237A (en) | PLC redundancy control system and method based on bus monitoring | |
| CN111781881A (en) | Man-machine interaction unit for train operation monitoring device and method for controlling on man-machine interaction unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |