Platform door management host and platform door system

Abstract

The invention relates to a platform door management host and a platform door system, which are used for processing received vehicle door alignment and isolation management data of a vehicle door of an automatic train monitoring subsystem, sending a vehicle door alignment and isolation request to a fault door control unit, and sending detected fault door control unit information to the automatic train monitoring subsystem. The platform door alignment isolation management system comprises a main control board, a communication board and a switching board which are arranged in a first machine cage, and an input board and an output board which are arranged in a second machine cage, and the first machine cage is in communication connection with the second machine cage; the platform door management host adopts double-system redundant backup setting, each system is provided with a main control board and a communication board, the number of the main control boards is the same as that of the communication boards, and main-standby switching logic management is carried out between the double systems through a switching board. Compared with the prior art, the system has the advantages of low failure rate and high safety and reliability through board card level redundancy.

Description

Technical Field

[0001] The present invention relates to the field of rail transit control, and in particular to a platform door management host and a platform door system. Background Art

[0002] The platform door system is a comprehensive product engineering that integrates multiple disciplines such as architecture, mechanics, electrical engineering, computer networks, automatic control and information processing. It is installed at the edge of the platform of subway, light rail and other rail transit stations to separate the rail train running area from the platform waiting area, and is equipped with sliding doors that can be opened and closed at multiple levels corresponding to the train doors. Due to the characteristics of safety, energy saving, environmental protection and beauty, the platform door system has been widely used in urban rail transit systems.

[0003] The platform door management host PMH is a subsystem of the platform door system. It is responsible for accepting the door-to-door isolation management of the train automatic monitoring ATS subsystem, sending the door isolation request to the DCU after processing, and sending the detected faulty door control unit DCU information to the ATS subsystem, and the signal system performs the platform door isolation management; it is responsible for supervising the relevant status of the integrated backup disk IBP, the platform door local control disk PSL, and related equipment inside the system such as relays, and managing IBP, PSL, internal related relays, and related equipment on the trackside mechanical structure (such as lighting up related indicator lights); it is responsible for transmitting the required non-safety management information to other subsystems such as gap detection.

[0004] After searching, Chinese invention patent application CN107807597A discloses a new platform door management method and system across lines and regions. This solution mainly focuses on monitoring cross-regional platform door fault information, and does not take into account the response and processing solution of the platform door management host PMH when a fault occurs. The fault cannot be eliminated in time, resulting in a high failure rate of the entire platform door system.

[0005] In addition, the platform door management host PMH occasionally mentions the dual-system setting, but it only involves directly switching to the other system when one of the dual systems fails. No specific dual-system master-standby implementation plan is given, and the failure rate is still very high; and the failure scenarios are not considered comprehensively, making it difficult to meet the failure response needs of different failure scenarios in actual work. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a platform door management host and platform door system with low failure rate and high safety and reliability.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] According to a first aspect of the present invention, there is provided a platform door management host, which is used to process the received door-to-door alignment isolation management data of the train automatic monitoring subsystem, send a door alignment isolation request to the faulty gate control unit, and send the detected faulty gate control unit information to the train automatic monitoring subsystem, so as to perform platform door alignment isolation management through a signal system, the platform door management host comprises a main control board, a communication board and a switching board arranged in a first cage, and an entry board and an exit board arranged in a second cage, the first cage and the second cage being communicatively connected;

[0009] The platform door management host adopts a dual-system redundant backup setting. Each system is equipped with a main control board, a communication board, a main control board and a communication board. The number of boards in each system is the same, and the main and standby switching logic management is performed between the two systems through a switching board.

[0010] Preferably, the boards in the first cage and the second cage adopt a double-system alternating design to prevent mis-insertion.

[0011] Preferably, the two systems are powered by independent DC power supplies.

[0012] Preferably, each system is provided with a main control board, and the interfaces of each main control board include:

[0013] Network port, used to upgrade the software of all boards in the system;

[0014] Ethernet interface, using TCP / IP protocol 10M / 100Mbps adaptive, used for external and / or automatic monitoring subsystem, and / or platform door controller, and / or maintenance monitoring terminal, and / or smart guide screen;

[0015] RS232 configuration port for downloading configuration data for each site;

[0016] Two mutually redundant CAN ports for communicating with the boards in the first cage to obtain the status and data of the dual-system input and output boards;

[0017] CAN port, used to communicate with the communication board of this department;

[0018] 2 redundant RS232 serial ports for data exchange with the main control board of another system; and

[0019] RS232 port for communication with the switching board.

[0020] Preferably, a self-alarm circuit is also provided in the main control board, and the self-alarm circuit includes a board restart alarm circuit, a watchdog restart alarm circuit, a communication status alarm circuit, an input board or output board wrong position alarm circuit, a main control board working voltage monitoring alarm circuit, and a chip temperature monitoring alarm circuit.

[0021] Preferably, the communication interface of the communication board includes an RS422 or RS485 communication acquisition interface, and a CAN communication acquisition interface, wherein the CAN address is set using a dip switch; the communication board communicates with the fault gating unit through the communication interface to transmit alignment or isolation information.

[0022] Preferably, in the second cage, the dual-system input boards that are placed adjacent to each other and serve as the main and backup for each other are connected in parallel to form an external interface, and the number of external interfaces is the number of input boards in each system; the equipment status information is collected in parallel through the dual-system paired input boards, and the equipment includes an integrated backup panel, a platform door local control panel and a central control panel.

[0023] Preferably, in the second cage, the dual-system output boards placed adjacent to each other and serving as the primary and standby for each other are connected in parallel to form an external interface, and the number of external interfaces is the number of output boards in each system; the output boards used in the dual systems are used to drive the equipment.

[0024] Preferably, the switch board is provided with:

[0025] 2 RS232 serial ports, used to communicate with the main control boards of the A and B series in the dual series respectively;

[0026] Three-state switch, the switching states include A system operation, automatic gear and B system operation; among them, in automatic gear, the first running system is the main system, and the other system is automatically the backup system.

[0027] Preferably, the master-slave communication logic between the two systems is as follows: all external data are transmitted to the master-slave system at the same time, and are received and logically operated by the master system and the standby system respectively, and the main control board of the master system sends the operated data externally; when the standby system is upgraded to the master system, the operated data is automatically sent externally; if the operation results of the two systems are inconsistent, the standby calibration module configured in the main control board is triggered to sound an alarm.

[0028] Preferably, the dual systems are logically managed by a switch board for active / standby switching, specifically:

[0029] Whenever the communication between this system and the switchboard and the peer system is interrupted, this system will automatically become the standby system;

[0030] Regardless of the time and state, the switchboard has the highest priority and accepts the switchboard's commands unconditionally;

[0031] Under no circumstances can there be two main systems.

[0032] When restarting, priority will be given to ensuring that the power supply voltage, interface status, and board status are completely normal. If both systems are normal, whoever applies first will take the lead.

[0033] Preferably, during automatic switching, arbitration is performed at the interface level, and the faulty gate control unit interface and the platform door controller interface are included in the arbitration, satisfying that if any one of the faulty gate control unit interface and the platform door controller interface is interrupted, the overall interface status is considered to be faulty.

[0034] Preferably, the train automatic monitoring subsystem adopts a peer polling communication mechanism, and the maintenance monitoring terminal replies from where the peer polls.

[0035] Preferably, the active / standby switching logic management further includes: when interface failures occur in both active and standby systems, the original state is maintained, and active / standby system switching is performed through manual intervention.

[0036] Preferably, when there is a communication failure between system A and system B, the active / standby switching logic is:

[0037] 1) System A communicates normally with the switch board, and system B communicates normally with the switch board: the switch board determines the active and standby systems. If the interface status is normal, one system is the active system and the other system is the standby system.

[0038] 2) Communication failure between system A and the switch board, while communication between system B and the switch board is normal: system A automatically switches to the backup system, and the switch board determines that system B is the primary system. Even if the interface status of system B fails at this time, it is still forced to switch to system B as the primary system;

[0039] 3) System A communicates normally with the switch board, but system B fails to communicate with the switch board: System B automatically switches to the backup system. The switch board determines that system A is the primary system, and even if the interface status of system A fails at this time, it still forces system A to switch to the primary system;

[0040] 4) Communication failure between system A and the switching board, communication failure between system B and the switching board: Ensure that both system A and system B are backup systems.

[0041] Preferably, when the communication between system A and system B is normal, the active / standby switching logic is:

[0042] 1) System A communicates normally with the switch board, while system B fails to communicate with the switch board: System A and system B negotiate the master and standby status, and whichever starts running first becomes the master system; if system A is the master system and system B is the standby system, when system A has an interface failure and system B is normal, then system B becomes the master system and system A becomes the standby system; when both systems have interface failures, the master and standby status remain;

[0043] 2) Communication failure between system A and the switch board, communication between system B and the switch board is normal:

[0044] A and B negotiate the master and backup roles, and whichever starts running first becomes the master. If B is the master and A is the backup, and there is an interface failure in B but A is normal, A becomes the master and B becomes the backup. If there are interface failures in both systems, the master and backup status remain.

[0045] 3) Communication failure between system A and the switch board, communication failure between system B and the switch board:

[0046] The switch board loses its function and manual switching does not work; the A / B system negotiates the master and standby, and whichever starts running first becomes the master; if system B is the master system and system A is the slave system, when system B has an interface failure and system A is normal, then A becomes the master system and B becomes the standby system; when both systems have interface failures, the input or output board status of the master and standby systems remains in the status before the failure.

[0047] According to a second aspect of the present invention, there is provided a platform door system, comprising an automatic train monitoring subsystem, a signal subsystem, a fault gate control unit and the platform door management host; the platform door management host receives the door-to-door alignment isolation management data of the automatic train monitoring subsystem, and after processing, sends a door alignment isolation request to the fault gate control unit, and at the same time sends the detected fault gate control unit information to the automatic train monitoring subsystem, so as to perform platform door alignment isolation management through the signal subsystem.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] (1) The present invention adopts a dual-system redundancy setting, and the master-slave switching logic management is performed between the dual systems through a switch board. The board-level redundancy further reduces the failure rate of the station door management host and improves the user experience.

[0050] (2) The main control board is equipped with a self-alarm circuit, including a board restart alarm circuit, a watchdog restart alarm circuit, a communication status alarm circuit, an input board or output board wrong position alarm circuit, a main control board working voltage monitoring alarm circuit, and a chip temperature monitoring alarm circuit. In addition, the main control board is equipped with a standby time calibration module. If the dual-system operation results are inconsistent, an alarm is triggered. The safety protection mechanism is more complete, which facilitates timely handling of fault alarms.

[0051] (3) The boards in the cage adopt a double-system alternating design to prevent mis-insertion, which is highly fault-tolerant and safer and more reliable.

[0052] (4) The switch board communicates with the main control board in each dual system, and uses the three-state switch to switch to automatic gear to achieve automatic master-slave switching under fault conditions. It is fastened in real time, improves fault handling efficiency, and is safer and more reliable.

[0053] (5) The active / standby switching logic solution of this invention covers more comprehensive fault scenarios and is more secure and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a schematic diagram of the overall architecture of the platform door management host PMH;

[0055] Figure 2This is a schematic diagram of the internal structure of the DCPU main control board;

[0056] Figure 3 This is a schematic diagram of the internal structure of the DCOM communication board;

[0057] Figure 4 This is a schematic diagram of the internal structure of the DHSM switch board;

[0058] Figure 5 This is a schematic diagram of the internal structure of the DIIB input board;

[0059] Figure 6 A schematic diagram of the internal structure of the board is provided for DOOB;

[0060] Figure 7 This is a schematic diagram of the DCPU main control board software master-slave switching process;

[0061] Figure 8 To open the state operation flow chart;

[0062] Fig. 9 Flowchart for sending data packets for DCOM communication board;

[0063] Fig.10 This is the flow chart of DHSM determining the main system according to the DCPU status in Auto status;

[0064] Fig.11 Flowchart of signal acquisition for DIIB input board;

[0065] Fig.12 Develop board output command flow chart for DOOB. DETAILED DESCRIPTION

[0066] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0067] Example

[0068] like Figure 1 As shown, this embodiment provides a platform door management host PMH, including:

[0069] 1) DCPU main control board: The DCPU main control board is installed in a 3U chassis. The software of all boards in the system can be upgraded through the network port, and it supports remote restart by sending commands through the network port. External interfaces include: 6 Ethernet interfaces, using TCP / IP protocol 10M / 100Mbps adaptive, network port connected to ATS / PSDC / smart guide screen; configuration through 1 RS232 configuration port, downloading configuration data such as the code position of each station, and supporting automatic restart after configuration; communicating with the boards in the 6U chassis through 2 CAN ports, CAN1 obtains the status and data of the A and B series input / output boards, and CAN2 also obtains the status and data of the A and B series input / output boards. The two ports are redundant and integrated in a DB9 port. The internal interfaces of the chassis with backplane wiring include: communicating with the communication board DCOM through a CAN port, and each DCPU main control board only needs to obtain the data of the DCOM communication board of this system; exchanging data with the DCPU main control board of another system (the system architecture is a dual-system structure, and the A and B system board configurations are the same) through two RS232 serial ports, and the two ports are redundant; communicating with the main and standby switching board DHSM through an RS232 port. The DCPU main control board has a watchdog function, and the board restart should not cause mis-drive and mis-collection (no false data transmission). The DCPU main control board indicator lights include power indicator light, running light, communication receiving\sending status indicator light, and network communication indicator light. The board has a self-alarm function, mainly including all board MCU restart alarms, watchdog restarts, communication status alarms, DIIB / DOOB board wrong position alarms, DCPU main control board self-working voltage monitoring alarms (outside the 22-26V range), MCU chip temperature monitoring alarms (greater than 85℃), etc. The board has a time calibration function. The final uploaded data is processed by the A and B series DCPU main control boards, and an alarm is issued in case of inconsistency between the collection / drive of the two systems.

[0070] 2) DCOM communication board: The DCOM communication board has 2 RS422 / RS485 communication acquisition interfaces, and the serial port baud rate can be configured to 9600bps, 19200bps and 38400bps. The communication board has 4 CAN communication acquisition interfaces. The CAN bus communication protocol adopts the CAN2.0B protocol. The baud rate is set to 125Kbps, which is configurable. The effective communication transmission distance is greater than 300 meters. The board communicates with the DCU through the CAN port or serial port to transmit key real-time data and alignment / isolation information (the port is determined according to the actual application). The board has a watchdog function. The indicator lights include power indicator, running light, communication receiving\sending status indicator, CAN port communication status indicator, and RS422 communication status indicator. The CAN address of the board is set by a dip switch, ON is 0, and OFF is 1. The communication board data is only transmitted to the DCPU main control board of this system.

[0071] 3) DHSM switch board: The indicator lights that the DHSM switch board needs to have include the power indicator light, the A / B system working indicator light, and the A / B system communication status indicator light. The A / B system working indicator light of the switch board will light up when the system is the main system. The A / B system communication status indicator light flashes when there is communication with the DCPU main control board. It needs to have a three-state switch, and the states include A working, AUTO automatic gear, and B working. When the switch of the switch board is in AUTO automatic gear, whichever system runs first is the main system, and the other system automatically becomes the backup system. The board has 2 RS232 serial ports, one for communicating with the DCPU of the A series, and one for communicating with the DCPU of the B series.

[0072] 4) DIIB input board: The DIIB input board can collect a total of 60 IBP / PSL / PSC device statuses in the upstream and downstream, and each board can collect 24 channels. The board supports 18V~60VDC voltage status collection. The switch quantity is automatically sent to the DCPU once at a collection rate of 50ms or 100ms. The board has a watchdog function. The input board indicator lights include power indicator, operation light, communication receiving\sending status indicator and 24 switch quantity input indicator lights. The indicator lights of the corresponding channels with input code positions are lit. The CAN address of the board is set by a dip switch, ON is 0, OFF is 1. The switch quantity collection value 0 / 1 voltage range is specified: switch quantity input: Vin≥18V level is high, Vin≤12V level is low. When the switch quantity of the input board is not powered on, the indicator light is off and the output value is 0; when powered on, the indicator light is on and the output value is 1. The boards used in dual-system pairing perform parallel collection at the same time. A 6U cage can hold six input boards, three in each series. Two adjacent boards are laid out in the form of ABABAB, and after AB wiring is combined into one external interface.

[0073] 5) DOOB output board: DOOB output board can drive a total of 120 IBP / PSL / PSC devices in the upstream and downstream, and each board can drive 24. The board supports external 18V~60VDC adjustable voltage output. Every 12 channels share a set of board input power, and the other 12 channels share a set of board input power. The board has a watchdog function. The output board indicator lights include power indicator, operation light, communication receiving\sending status indicator and 24-channel drive port indicator lights. The indicator lights of the corresponding channels with output code positions are lit. The CAN address of the board is set by a dip switch, ON is 0, OFF is 1. The boards used in pairs of two systems are driven simultaneously. A 6U cage can hold 10 output boards, 5 in each system. The two adjacent boards are arranged in the form of ABABABABAB, and merged into an external interface after paralleling.

[0074] 6) Chassis: The entire PMH system includes 2 cages, one 3U cage (installed with DCPU, DCOM, DHSM switching board), and one 6U cage (installed with DIIB, DOOB output board). The two cages communicate through CAN lines. The system adopts a dual-system structure, with the same number of boards in the A and B series. Each series includes a DCPU main control board, up to 4 DCOM communication boards, 3 DIIB input boards, and 5 DOOB output boards. There is a DHSM between the two systems for switching logic management.

[0075] 7) Power supply: A and B series cards have their own independent 24VDC (±10%) input power supply. The DHSM switch board requires both A and B series power supply. The power consumption of the fully equipped 3U and 6U chassis is less than 100W.

[0076] like Figure 2 As shown, the functions of the DCPU main control board are introduced as follows:

[0077] The CPU uses the high-performance MCU AT32F435 produced by Arteli. The CPU system includes a Qspi interface flash chip for storing user-edited logic data; an EEPROM for storing the setting information of each interface, an external SDRAM and an external door dog chip. Six network expansion chips meet the needs of six external network interfaces, three CAN interface chips are used for input and output communication and communication board interface communication; four RS232s are used for configuration data reading and writing, communication with the switch board, and communication with another series of CPU boards; and a Py32 so8 chip is used to measure the power supply voltage and read the AB series flag.

[0078] like Figure 3 As shown, the functions of the DCOM communication board are introduced as follows:

[0079] The CPU of the DCOM communication board adopts the high-performance MCU AT32F435 produced by Arteli. The CPU system includes a piece of EEPROM for storing the logic data edited by the user, a piece of external SDRAM and an external door dog chip. The DCOM communication board 1 communicates with the CPU board through the CAN bus circuit composed of the CAN controller inside the MCU and the CAN isolation module, the 4-way extended CAN bus circuit is used for external CAN communication, and the 2-way RS485 / 422 is used for external communication.

[0080] like Figure 4 As shown, the functions of the DHSM switchboard are as follows:

[0081] The DHSM switch board uses AT32F403A as the core CPU, and the CPU core system is composed of an external watchdog SP706 and EEPROM 24C16. It collects the AB system power supply voltage through two analog quantity acquisition circuits and communicates with the AB system CPU board through two RS232 interfaces.

[0082] like Figure 5 As shown, the functions of the DIIB input board are introduced as follows:

[0083] DIIB input board The input board adopts AT32F403A as the core CPU, and the CPU core system is composed of external watchdog SP706 and EEPROM24C16. It collects power supply voltage through analog quantity acquisition circuit and communicates with AB series CPU board through two CAN bus interfaces. The input board has 24 switch quantity acquisition circuits, and the switch quantity signals are isolated from the internal circuit by optical couplers.

[0084] like Figure 6 As shown, the functions of DOOB output board are introduced as follows:

[0085] DOOB output board The output board adopts AT32F403A as the core CPU, and the CPU core system is composed of external watchdog SP706 and EEPROM24C16. It collects the power supply voltage through analog quantity acquisition circuit, and communicates with the AB series CPU board through two CAN bus interfaces; the output board has two groups of switch output channels, each group of 12 output channels, two groups of relay power supplies (24V DC), and two groups of output power supplies (0-60V DC), and each output channel has output voltage and current acquisition circuit.

[0086] like Figure 7 As shown in the figure, it is the DCPU main control board software master-slave switching process, such as Figure 8 The following is a flowchart of the operation of the output state. The functions of the board software are introduced as follows:

[0087] The DCPU main control board program can be divided into three parts: interface communication program, IO logic operation and sampling drive program, and main-standby system switching program. The DCPU main control board communicates with the DIIB, DOOB, and DCOM communication boards through the CAN communication interface to obtain input, output, DCU, and gap detection status data, and converts all these data into switch quantities; communicates with PSDC, ATS, PMM, and smart screens through the network interface, and obtains the corresponding status quantity data, and converts them into switch quantities; then the above switch quantity data is calculated according to the logic configured by the user, and then the corresponding output channel is driven according to the calculation logic.

[0088] like Fig. 9As shown in the figure, the DCOM communication board communicates with the DCPU through the CAN1 interface. The DCPU sends a heartbeat packet to the DCOM communication board every second. After receiving the heartbeat packet, the DCOM communication board replies with a status packet data. When any of the four external CAN ports and two RS485 interfaces of the DCOM receives data, the DCOM communication board packages the received data and sends it to the DCPU main control board. After receiving the send data command issued by the DCPU main control board, the DCOM immediately sends the data through the corresponding interface.

[0089] like Fig.10 As shown, the DHSM switch board communicates with the A and B series DCPU main control boards through two serial ports to obtain the operating status of the DCPU main control board. In the Auto state, the DHSM determines the main system according to the DCPU state. In the non-Auto state, the DHSM installs the user-specified determination of the main system.

[0090] like Fig.11 As shown, the DIIB input board collects 24 switch signals. DIIB uploads a packet of status data to the DCPU main control board every 250ms. If the signal changes, a packet of data is uploaded immediately.

[0091] like Fig.12 As shown in the figure, the DOOB output board will accept the output command only after receiving the heartbeat packet from the DCPU main control board within 5 seconds.

[0092] The present embodiment also provides a platform door system, including a train automatic monitoring subsystem, a signal subsystem, a fault gate control unit and the above-mentioned platform door management host; the platform door management host receives the door-to-door alignment and isolation management data of the train automatic monitoring subsystem, and after processing, sends a door alignment and isolation request to the fault gate control unit, and at the same time sends the detected fault gate control unit information to the train automatic monitoring subsystem, so as to perform platform door alignment and isolation management through the signal subsystem.

[0093] The present invention has been applied to the urban rail platform door system, with low failure rate, perfect safety detection mechanism, timely fault handling and good user experience.

[0094] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A platform door management host, used for processing the received door-to-door alignment isolation management data of the train automatic monitoring subsystem, sending a door alignment isolation request to the faulty door control unit, and sending the detected faulty door control unit information to the train automatic monitoring subsystem, so as to perform platform door alignment isolation management through the signal system, characterized in that: The platform door management host comprises a main control board, a communication board and a switch board arranged in a first cage, and an entry board and an exit board arranged in a second cage, and the first cage is in communication connection with the second cage; The platform door management host adopts a dual-system redundant backup setting. Each system is equipped with a main control board, a communication board, a main control board and a communication board. The number of boards in each system is the same, and the main and standby switching logic management is performed between the two systems through a switching board.

2. A platform door management host according to claim 1, characterized in that: The boards in the first cage and the second cage adopt a double-system alternating design to prevent wrong insertion.

3. A platform door management host according to claim 1, characterized in that: Each system is equipped with a main control board. The interfaces of each main control board include: Network port, used to upgrade the software of all boards in the system; Ethernet interface, using TCP / IP protocol 10M / 100Mbps adaptive, used for external and / or automatic monitoring subsystem, and / or platform door controller, and / or maintenance monitoring terminal, and / or smart guide screen; RS232 configuration port for downloading configuration data for each site; Two mutually redundant CAN ports for communicating with the boards in the first cage to obtain the status and data of the dual-system input and output boards; CAN port, used to communicate with the communication board of this department; 2 redundant RS232 serial ports for data exchange with the main control board of another system; and RS232 port for communication with the switching board.

4. A platform door management host according to claim 3, characterized in that: The main control board is also provided with a self-alarm circuit, which includes a board restart alarm circuit, a watchdog restart alarm circuit, a communication status alarm circuit, an input board or output board wrong position alarm circuit, a main control board working voltage monitoring alarm circuit, and a chip temperature monitoring alarm circuit.

5. A platform door management host according to claim 1, characterized in that: The communication interface of the communication board includes an RS422 or RS485 communication acquisition interface and a CAN communication acquisition interface, wherein the CAN address is set using a dip switch; the communication board communicates with the fault gating unit through the communication interface to transmit alignment or isolation information.

6. A platform door management host according to claim 1, characterized in that: In the second cage, the dual-system input boards that are placed adjacent to each other and serve as the main and backup for each other are connected in parallel to form an external interface. The number of external interfaces is the number of input boards in each system. The equipment status information is collected in parallel through the dual-system paired input boards. The equipment includes an integrated backup panel, a platform door local control panel and a central control panel.

7. A platform door management host according to claim 6, characterized in that: In the second cage, the dual-system output boards placed adjacent to each other and serving as the primary and standby of each other are connected in parallel to form an external interface. The number of external interfaces is the number of output boards in each system. The equipment is driven by the output boards used in pairs of the dual systems.

8. A platform door management host according to claim 1, characterized in that: The switch board is provided with: 2 RS232 serial ports, used to communicate with the main control boards of the A and B series in the dual series respectively; Three-state switch, the switching states include A system operation, automatic gear and B system operation; among them, in automatic gear, the first running system is the main system, and the other system is automatically the backup system.

9. A platform door management host according to claim 8, characterized in that: The master-slave communication logic between the two systems is specifically as follows: all external data is transmitted to the master-slave system at the same time, and the master system and the backup system receive and perform logical operations respectively, and the main control board of the master system sends the calculated data outward; when the backup system is upgraded to the master system, the calculated data is automatically sent outward; if the calculation results of the two systems are inconsistent, the backup calibration module configured in the main control board is triggered to alarm.

10. A platform door management host according to claim 9, characterized in that: The dual systems are logically managed by the switch board for active / standby switching, specifically: Whenever the communication between this system and the switchboard and the peer system is interrupted, this system will automatically become the standby system; Regardless of the time and state, the switchboard has the highest priority and accepts the switchboard's commands unconditionally; No matter what the situation, there cannot be two main systems. When restarting, priority will be given to ensuring that the power supply voltage, interface status, and board status are completely normal. If both systems are normal, whoever applies first will take the lead.

11. A platform door management host according to claim 10, characterized in that: During automatic switching, arbitration is performed at the interface level, and the faulty gate control unit interface and the platform door controller interface are included in the arbitration. If any one of the faulty gate control unit interface and the platform door controller interface is interrupted, the overall interface status is considered to be faulty.

12. A platform door management host according to claim 11, characterized in that: The train automatic monitoring subsystem adopts the other-party polling communication mechanism. The maintenance monitoring terminal will reply from where the other party polls.

13. A platform door management host according to claim 10, characterized in that: The active / standby switching logic management further includes: when both active and standby systems have interface failures, the original state is maintained and active / standby system switching is performed through manual intervention.

14. A platform door management host according to claim 10, characterized in that: When the communication between system A and system B fails, the active / standby switching logic is as follows: 1) System A communicates normally with the switch board, and system B communicates normally with the switch board: the switch board determines the active and standby systems. If the interface status is normal, one system is the active system and the other system is the standby system. 2) Communication failure between system A and the switch board, while communication between system B and the switch board is normal: system A automatically switches to the backup system, and the switch board determines that system B is the primary system. Even if the interface status of system B fails at this time, it is still forced to switch to system B as the primary system; 3) System A communicates normally with the switch board, but system B fails to communicate with the switch board: System B automatically switches to the backup system. The switch board determines that system A is the primary system, and even if the interface status of system A fails at this time, it still forces system A to switch to the primary system; 4) Communication failure between system A and the switching board, communication failure between system B and the switching board: Ensure that both system A and system B are backup systems.

15. A platform door management host according to claim 10, characterized in that: When the communication between system A and system B is normal, the active / standby switching logic is: 1) System A communicates normally with the switch board, while system B fails to communicate with the switch board: System A and system B negotiate the master and standby status, and whichever starts running first becomes the master system; if system A is the master system and system B is the standby system, when system A has an interface failure and system B is normal, then system B becomes the master system and system A becomes the standby system; when both systems have interface failures, the master and standby status remain; 2) Communication failure between system A and the switch board, communication between system B and the switch board is normal: A and B negotiate the master and backup roles, and whichever starts running first becomes the master. If B is the master and A is the backup, and there is an interface failure in B but A is normal, A becomes the master and B becomes the backup. If there are interface failures in both systems, the master and backup status remain. 3) Communication failure between system A and the switch board, communication failure between system B and the switch board: The switch board loses its function and manual switching does not work; the A / B system negotiates the master and standby, and whichever starts running first becomes the master; if system B is the master system and system A is the slave system, when system B has an interface failure and system A is normal, then A becomes the master system and B becomes the standby system; when both systems have interface failures, the input or output board status of the master and standby systems remains in the status before the failure.

16. A platform door system, characterized in that: It comprises a train automatic monitoring subsystem, a signal subsystem, a fault gate control unit and a platform door management host as described in any one of claims 1 to 15; the platform door management host receives the door-to-door alignment isolation management data of the train automatic monitoring subsystem, and after processing, sends a door alignment isolation request to the fault gate control unit, and at the same time sends the detected fault gate control unit information to the train automatic monitoring subsystem, so as to perform platform door alignment isolation management through the signal subsystem.

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