Platform door control system and method

Abstract

The invention provides a platform door control system and method, and belongs to the technical field of platform control. The platform door control system comprises a safety control module, an Ethernet interface and a hard wire interface; the Ethernet interface is configured to establish communication connection with a vehicle-mounted controller; the hard wire interface is configured to be connected with the gating unit; the safety control module receives platform door control information sent by the vehicle-mounted controller through the Ethernet interface and generates a platform door driving signal according to the platform door control information; the safety control module transmits the platform door driving signal to the door control unit through the hard wire interface so as to drive the door control unit to execute the opening or closing action of the platform door. According to the platform door control system, the Ethernet interface directly communicating with the vehicle-mounted controller and the hard wire interface connected with the door control unit are arranged in the platform door control system, direct transmission of control commands and physical hard connection of action driving are achieved, transmission nodes are simplified, train-ground linkage time delay is shortened, and meanwhile the transmission efficiency of the platform door control system is improved. And high real-time performance of platform door control is ensured.

Description

Technical Field

[0001] This invention relates to the field of platform control technology, and in particular to a platform door control system and method. Background Technology

[0002] Existing platform screen door control systems generally adopt a multi-level architecture, meaning that the door opening and closing commands issued by the vehicle signal system must first be transmitted to the ground interlocking system, and then the ground interlocking system forwards them to the platform screen door central control panel through a hard-wired interface, ultimately driving the door control unit to operate.

[0003] In this architecture, control commands need to undergo protocol conversion and physical signal relay between multiple independent devices, resulting in lengthy transmission paths and too many intermediate nodes. This multi-level forwarding mode leads to significant cumulative delays in information transmission, severely impacting the real-time performance and synchronization accuracy of the linkage control between platform screen doors and train doors. This makes it difficult to meet the operational requirements of fully automated systems for high-density train operation and efficient linkage, thereby reducing the overall transportation efficiency of rail transit. Summary of the Invention

[0004] This invention provides a platform screen door control system and method to overcome the deficiencies in the prior art, thereby improving the real-time performance and synchronization accuracy of the linkage control between platform screen doors and train doors, and improving the overall transportation efficiency of rail transit.

[0005] This invention provides a platform door control system, comprising: a safety control module, an Ethernet interface, and a hard-wired interface; The Ethernet interface is configured to establish a communication connection with the vehicle controller; the hardwired interface is configured to connect to the gate control unit. The safety control module is used to receive platform door control information sent by the vehicle controller through the Ethernet interface, and generate platform door drive signals according to the platform door control information. The safety control module is also used to transmit the platform door drive signal to the door control unit through the hard-wired interface, so as to drive the door control unit to perform the opening or closing action of the platform door.

[0006] According to a platform screen door control system provided by the present invention, the safety control module is further configured to acquire the operating status data of the platform screen door module and generate the platform screen door feedback information based on the operating status data; The safety control module is also used to transmit the platform door feedback information to the vehicle controller via the Ethernet interface.

[0007] According to the platform screen door control system provided by the present invention, the platform screen door feedback information includes at least one of the following: platform fully automatic operation button status information, gap detection status information, and platform screen door fault isolation information; The platform fully automatic operation button status information represents the operation status of the door opening button, door closing button, or departure button set on the platform; the gap detection status information represents the detection result of the gap between the train and the platform door.

[0008] According to the platform door control system provided by the present invention, the system further includes a CAN bus interface; The CAN bus interface is configured to establish a communication connection with the gating unit; The safety control module is also used to receive gate control unit monitoring information sent by the gate control unit through the CAN bus interface; The door control unit monitoring information includes at least one of the following: DCU detection status, sliding door closing fault status, sliding door opening fault status, and motor fault status.

[0009] According to a platform screen door control system provided by the present invention, the Ethernet interface is further configured to establish a communication connection with a gap detection module; the hardwire interface is further configured to connect to the gap detection module. The safety control module is used to send a start control signal or a stop control signal to the gap detection module through the hard wire interface; The safety control module is also used to receive gap detection diagnostic information sent by the gap detection module through the Ethernet interface; The gap detection and diagnostic information includes at least one of the following: light curtain fault information, light curtain bypass information, light curtain obstacle information, safety circuit status information, and communication status information.

[0010] According to a platform screen door control system provided by the present invention, the hard-wired interface is further configured to connect to a local control panel and a comprehensive backup panel; The safety control module is also used to receive platform-level door opening and closing commands sent by the local control panel and emergency-level door opening and closing commands sent by the integrated backup panel through the hard-wired interface. The security control module is specifically configured as follows: Priority identification is performed on the platform door control information, the platform-level door opening and closing commands, and the emergency-level door opening and closing commands; Based on the priority identification result, a response is selected to generate the platform door drive signal.

[0011] According to a platform door control system provided by the present invention, the Ethernet interface is further configured to establish a communication connection with a computer interlocking module; The safety control module is also used to send platform door monitoring information to the computer interlocking module through the Ethernet interface; The security control module is also used to receive communication hold messages sent by the computer interlocking module through the Ethernet interface in order to maintain communication with the computer interlocking module. The platform door monitoring information includes at least one of the following: platform door open status, platform door closed status, platform door bypass status, gap detection status, gap detection activation status, and gap detection bypass status.

[0012] According to the present invention, a platform door control system further includes a platform door monitoring module; The Ethernet interface is also configured to establish a communication connection with the platform door monitoring module; The safety control module is also used to receive maintenance instructions sent by the platform door monitoring module through the Ethernet interface, and to perform corresponding query or test operations according to the maintenance instructions; The safety control module is also used to send comprehensive monitoring data to the platform door monitoring module through the Ethernet interface, so that the platform door monitoring module can display the status or issue an alarm. The maintenance instructions include gate control unit parameter setting query instructions or loop test instructions; The comprehensive monitoring data includes at least one of the following: gate control unit status information, safety circuit status information, local control panel operation status information, comprehensive backup panel operation status information, and fault alarm information.

[0013] According to the platform door control system provided by the present invention, the safety control module is configured to adopt a 2x2 redundancy check architecture.

[0014] The present invention also provides a platform screen door control method, comprising: The system receives platform door control information sent by the vehicle controller via an Ethernet interface and generates platform door drive signals based on the platform door control information. The platform door drive signal is transmitted to the door control unit through a hard-wired interface to drive the door control unit to perform the opening or closing action of the platform door.

[0015] In summary, one or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: By configuring an Ethernet interface to establish a direct communication connection with the onboard controller, the relay link of the ground interlocking system in the traditional architecture is eliminated, thereby simplifying the transmission nodes of control commands and significantly shortening the transmission delay, ensuring the real-time interaction of vehicle and ground information. By using a hard-wired interface to directly transmit the drive signals generated by the safety control module to the gate control unit, the physical hard-connection characteristics of the execution link are retained, thereby ensuring the high reliability and safety of the platform door operation. Through the control architecture combining Ethernet communication and hard-wired drive, efficient linkage between train doors and platform doors is achieved, thereby solving the problem of poor timeliness of traditional control methods and improving the overall transportation efficiency of rail transit. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the platform door control system provided by the present invention.

[0018] Figure 2 This is a schematic diagram of the overall architecture and communication logic of a platform door control system provided by the present invention.

[0019] Figure 3 This is a flowchart illustrating the platform door control method provided by the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0021] It should be noted that in the description of this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The terms "upper," "lower," etc., indicating orientation or positional relationships according to the accompanying drawings, are only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] The following is combined Figures 1 to 3 This invention describes the platform screen door control system and method provided by the present invention.

[0023] Reference Figure 1 , Figure 1 This is a schematic diagram of the platform screen door control system provided by the present invention, as shown below. Figure 1 As shown, the platform screen door control system includes: a safety control module, an Ethernet interface, and a hard-wired interface; Ethernet interface, configured to establish a communication connection with the vehicle controller; hardwired interface, configured to connect to the gate control unit; The safety control module is used to receive platform door control information sent by the vehicle controller via the Ethernet interface, and generate platform door drive signals based on the platform door control information. The safety control module is also used to transmit the platform door drive signal to the door control unit through a hard-wired interface, so as to drive the door control unit to perform the opening or closing action of the platform door.

[0024] This embodiment provides an Integrated Platform Door Controller (IPDC) system, which mainly consists of a safety control module, namely a Platform Edge Door Controller (PEDC), an Ethernet interface, and a hard-wired interface.

[0025] Specifically, the security control module, as the core computing and logic processing unit of the system, is responsible for performing security checks and logical judgments on received external instructions and outputting corresponding control instructions. This security control module is configured with a 2x2 redundancy check architecture to achieve a Security Integrity Level (SIL4) standard, ensuring that the system maintains a secure state even if a single logic unit fails.

[0026] The Ethernet interface is a data transmission port based on the Ethernet communication protocol. Its physical layer adopts a standard network interface form and is configured to establish a communication connection with the Vehicle On-Board Controller (VOBC), realizing direct data interaction between the ground control system and the vehicle system.

[0027] The hardwired interface is a signal output port based on physical wires or relay contacts. It is configured to connect to the Door Control Unit (DCU) via a cable connector. The Door Control Unit can be divided into N uplink DCUs and N downlink DCUs for transmitting highly reliable voltage drive signals.

[0028] In the specific control process, the onboard controller generates platform screen door control information based on the train's stopping position and door status. This information includes command data instructing the platform screen doors to open or close. The safety control module directly receives the platform screen door control information sent by the onboard controller via an Ethernet interface.

[0029] Unlike traditional systems that require multiple relay relays via ground interlocking systems, the safety control module in this embodiment directly parses Ethernet data packets from the onboard controller. Based on the parsed platform screen door control information and its internally preset safety logic, the safety control module performs calculations to generate the corresponding platform screen door drive signal. This drive signal is a voltage level signal capable of triggering the actuator. Subsequently, the safety control module transmits the generated drive signal to the door control unit via a hardwired interface. The door control unit, acting as the actuator controller, receives the drive signal from the hardwired interface and controls the platform screen door motor to operate, thereby driving the platform screen door to open or close, ensuring that the platform screen door and train doors move synchronously.

[0030] The above technical solution achieves the following technical effects: First, establishing direct communication between the safety control module and the on-board controller via an Ethernet interface simplifies transmission nodes, effectively shortens the transmission delay of control commands, ensures real-time information, and thus improves the timeliness of the linkage between train doors and platform doors, preventing the risk of passengers accidentally stepping into empty spaces due to linkage lag, and improving passenger transport efficiency. Second, using a hard-wired interface to transmit drive signals to the door control unit preserves the physical hard connection of the execution link. Combined with the 2x2-out-of-2 architecture of the safety control module, it ensures high reliability and high safety of platform door control. Finally, this architecture reduces reliance on the hardware forwarding circuits of the ground interlocking system, reduces the coupling between devices and the number of hardware interfaces, thereby reducing system failure points, simplifying the engineering design, and lowering system operation and maintenance costs.

[0031] In one possible implementation, the safety control module is also used to acquire the operating status data of the platform screen door module and generate platform screen door feedback information based on the operating status data. The safety control module is also used to transmit platform door feedback information to the vehicle controller via an Ethernet interface.

[0032] To enable the onboard system to monitor and control the status of ground equipment in real time, the safety control module also features status monitoring and feedback capabilities. The safety control module acquires real-time operational status data from the platform screen door module via internal acquisition circuits or communication interfaces. Here, the platform screen door module refers to the set of underlying devices in the platform screen door system responsible for performing actions, detecting the environment, or receiving manual operations, including but not limited to door control units, gap detection devices, and platform operation buttons. The operational status data reflects the real-time parameters or logical states of these devices.

[0033] In practice, the safety control module aggregates and encodes the acquired operational status data to generate platform screen door feedback information conforming to the communication protocol format. Subsequently, utilizing the high bandwidth of the Ethernet interface, the safety control module directly sends this feedback information to the vehicle controller.

[0034] Unlike traditional relay interfaces, which can only transmit simple "door open / door close" signals, the Ethernet interface in this embodiment can transmit larger amounts of structured data with richer content. After receiving this feedback information, the onboard controller uses it to determine the train's operational protection logic or displays it on the driver's interface.

[0035] In one possible implementation, the platform door feedback information includes at least one of the following: platform fully automatic operation button status information, gap detection status information, and platform door fault isolation information. Among them, the status information of the fully automatic operation button on the platform represents the operation status of the door opening button, door closing button or departure button set on the platform; the gap detection status information represents the detection results of the gap between the train and the platform door.

[0036] Specifically, the Fully Automatic Operation (FAO) button status information refers to data characterizing the operational status of physical buttons located on the platform side for manual control. These buttons are typically integrated into a local control panel or a separate emergency operation panel, including open buttons to request the opening of platform doors, close buttons to request the closing of platform doors, and departure buttons to confirm train clearance. Gap detection status information refers to data characterizing the detection results of the safe gap between the train car body and the platform door body, indicating the presence of foreign objects or passengers remaining in that area. Platform door fault isolation information refers to status data characterizing the status of a specific platform door unit that has been disconnected from power or logically bypassed due to a fault.

[0037] In a specific implementation, the safety control module collects the level signals of each button on the platform side in real time via a hard-wired interface to identify whether the door open, door close, or departure button has been pressed. Simultaneously, it receives detection results uploaded by the gap detection system via Ethernet or a hard-wired interface; and it collects the health status of each door control unit via the CAN bus or status line to determine which door units are in isolation mode. The safety control module integrates the above-mentioned dispersed information, encapsulates it into an Ethernet communication message, and sends it to the onboard controller as platform door feedback information. After parsing this information, the onboard controller can obtain the detailed current status of the platform. For example, when it receives information indicating that the departure button has been pressed, the onboard controller determines that the departure conditions are met and starts the train; when it receives a gap detection alarm, the onboard controller prohibits the train from starting to prevent accidents.

[0038] In one possible implementation, in order to further improve the system's perception of the underlying execution devices and maintenance efficiency, the platform door control system in this embodiment also includes a CAN bus interface. CAN bus interface, configured to establish a communication connection with the gating unit; The safety control module is also used to receive gate control unit monitoring information sent by the gate control unit via the CAN bus interface; The door control unit monitoring information includes at least one of the following: DCU detection status, sliding door closing fault status, sliding door opening fault status, and motor fault status.

[0039] Specifically, the CAN (Controller Area Network) bus interface is an industrial-grade communication interface based on a serial communication protocol, characterized by strong anti-interference capabilities and high real-time performance. This CAN bus interface is configured to establish a communication connection with a gating unit, used for transmitting non-safety-critical monitoring data and parameter information between the safety control module and the gating unit.

[0040] In a specific implementation, although the opening and closing drive commands for the platform screen doors are transmitted via a hard-wired interface to ensure the highest level of security, the system uses a CAN bus for transmission of diagnostic data, which has a large volume and relatively low real-time requirements. The door control unit integrates sensors and a self-diagnostic program, enabling it to monitor its own operating status and the physical state of the controlled sliding doors in real time. N uplink DCUs and N downlink DCUs package the data they monitor into CAN messages and send them to the safety control module via the CAN bus. The safety control module receives this door control unit monitoring information through the CAN bus interface. This door control unit monitoring information contains rich data dimensions, specifically covering at least one of the following: DCU detection status, sliding door closing fault status, sliding door opening fault status, and motor fault status. Specifically, the DCU detection status reflects the hardware and software health of the control unit; the sliding door closing or opening fault status refers to specific faults encountered by the door when performing the corresponding action, such as mechanical jamming or failure to reach the correct position within a time limit; and the motor fault status characterizes specific electrical faults such as abnormal current in the drive motor, overheating, or Hall sensor failure.

[0041] In one possible implementation, the Ethernet interface is further configured to establish a communication connection with the gap detection module; the hardwired interface is further configured to connect to the gap detection module. The safety control module is used to send start or stop control signals to the gap detection module via a hard-wired interface; The safety control module is also used to receive gap detection diagnostic information sent by the gap detection module via the Ethernet interface; The gap detection and diagnostic information includes at least one of the following: light curtain fault information, light curtain bypass information, light curtain obstacle information, safety circuit status information, and communication status information.

[0042] In this embodiment, the platform screen door control system reuses the functions of the Ethernet interface and the hardwired interface, configuring them to establish communication and hardwired connections with the Gap Detection System (GDS), thereby constructing a dual-channel interactive architecture of "hardwired control and network diagnostics". The Gap Detection System is a safety detection system installed at the edge of the platform to monitor whether there are obstacles or stranded passengers between the train car body and the platform screen door. Common implementations include lidar or infrared light curtains.

[0043] In a specific implementation, the safety control module employs a strategy of separating physical triggering from data interaction to control the gap detection function. At the control level, when the system logic determines that the gap detection function needs to be activated (e.g., during the opening of a platform door), the safety control module sends a start control signal to the gap detection module via a hard-wired interface; when the detection process ends or a forced reset is required, a stop control signal is sent. Using a hard-wired interface to send start and stop signals ensures high real-time performance and high reliability of the detection action triggering. At the information level, the safety control module receives gap detection diagnostic information sent by the gap detection module via an Ethernet interface. This gap detection diagnostic information includes detailed system health and operational data, specifically covering at least one of the following: light curtain fault information (e.g., transmitter or receiver damage), light curtain bypass information (e.g., a specific detection area being manually blocked), light curtain obstacle information (e.g., a foreign object obstructing a specific location), safety loop status information (e.g., the engagement status of an internal safety relay), and communication status information (e.g., the heartbeat status of a network connection).

[0044] In one possible implementation, the hard-wired interface is also configured to connect to the local control panel and the integrated backup panel. The safety control module is also used to receive platform-level door opening and closing commands sent by the local control panel and emergency-level door opening and closing commands sent by the integrated backup panel via a hard-wired interface. The security control module is specifically configured as follows: Priority identification is performed on platform door control information, platform-level door opening and closing commands, and emergency-level door opening and closing commands. Based on the priority identification results, one response is selected to generate the platform door drive signal.

[0045] In this embodiment, to ensure that operators can effectively manually control the platform screen doors in the event of a malfunction or emergency situation in the fully automated system, the hard-wired interface of the platform screen door control system is also configured to connect to the Platform Screen Door Local Control Panel (PSL) and the Integrated Backup Panel (IBP). The PSL is a control panel installed at the platform end door, allowing station staff to operate a single platform screen door locally from the platform side. The IBP is a control panel installed in the station control room or disaster prevention center, allowing station staff to remotely operate all platform screen doors in emergency situations. Platform-level door opening / closing commands are control instructions issued through the PSL, typically used in train testing or platform emergency response scenarios. Emergency-level door opening / closing commands are control instructions issued through the IBP, with higher safety priority, typically used in fire scenarios or system-level failure scenarios.

[0046] In a specific implementation, the safety control module acquires relay contact signals from the local control panel and the integrated backup panel in real time via a hard-wired interface. Simultaneously, the safety control module also continuously receives platform door control information (i.e., signal-level control) from the onboard signaling module via an Ethernet interface. Internally, the safety control module runs a priority identification logic program, specifically configured to perform real-time scanning and status determination of the received platform door control information, platform-level door opening / closing commands, and emergency-level door opening / closing commands.

[0047] The safety control module prioritizes commands from these three sources according to preset logic rules. Typically, the priority order is: emergency door opening / closing commands (IBP control) have the highest priority, platform-level door opening / closing commands (PSL control) have the next highest priority, and platform door control information (signal system control) has the lowest priority. Based on the priority identification, the safety control module selects one to respond to generate the platform door drive signal. For example, when the safety control module simultaneously receives an "open door" command from the onboard signal module and a "close door" command from the integrated backup panel, since the integrated backup panel has a higher priority, the safety control module will ignore the onboard signal module's command, respond to the integrated backup panel's command, generate a door closing drive signal, and send it to the door control unit via a hardwired interface.

[0048] In one possible implementation, the Ethernet interface is also configured to establish a communication connection with the computer interlocking module; The safety control module is also used to send platform door monitoring information to the computer interlocking module via an Ethernet interface; The safety control module is also used to receive communication hold messages sent by the computer interlocking module via the Ethernet interface in order to maintain communication with the computer interlocking module. The platform door monitoring information includes at least one of the following: platform door opening status, platform door closing status, platform door bypass status, gap detection status, gap detection activation status, and gap detection bypass status.

[0049] In this embodiment, to achieve state synchronization between the platform screen door system and the rail transit signal interlocking system, and to optimize the control architecture, the Ethernet interface of the platform screen door control system is also configured to establish a communication connection with the Computer Interlocking (CI) module. The computer interlocking module is the core device in the signaling system responsible for station route control and the interlocking logic of switches and signals. In the architecture of this technical solution, the role of the computer interlocking module has changed; it no longer acts as a relay station for platform screen door opening and closing commands, but rather as a receiver and monitor of status information.

[0050] In a specific implementation, the safety control module, through its internal acquisition logic, aggregates various key status data of the current platform screen door system in real time and encapsulates them into platform screen door monitoring information. The safety control module then uses an Ethernet interface to send this monitoring information to the computer interlocking module according to a predetermined communication protocol. This monitoring information includes: the platform screen door's open and closed status reflecting its physical position; the platform screen door's bypass status reflecting whether the door is logically isolated; and at least one of the following related to the gap detection function: gap detection status (detection result), gap detection activation status (function activated), and gap detection bypass status (detection function disabled).

[0051] Meanwhile, to ensure the effectiveness of the communication link between the two parties, the safety control module receives a communication hold message sent by the computer interlocking module via the Ethernet interface. This communication hold message typically uses an empty header and does not contain specific door opening / closing control commands. The safety control module maintains communication with the computer interlocking module by detecting the frequency of this message reception. If the message is not received within a specified time, the module determines that communication has been interrupted and executes the corresponding fault handling logic.

[0052] In one possible implementation, the system also includes a platform door monitoring module; The Ethernet interface is also configured to establish a communication connection with the platform screen door monitoring module; The safety control module is also used to receive maintenance instructions sent by the platform door monitoring module via the Ethernet interface, and to perform corresponding query or test operations according to the maintenance instructions; The safety control module is also used to send comprehensive monitoring data to the platform door monitoring module via the Ethernet interface, so that the platform door monitoring module can display the status or issue an alarm. Among them, maintenance commands include gate control unit parameter setting query commands or loop test commands; The comprehensive monitoring data includes at least one of the following: gate control unit status information, safety circuit status information, local control panel operation status information, comprehensive backup panel operation status information, and fault alarm information.

[0053] In this embodiment, to achieve centralized monitoring, fault alarm, and maintenance management of the entire platform screen door system, the platform screen door control system also integrates a platform screen door monitoring module, namely the Machine Monitoring System (MMS). The platform screen door monitoring module is a computer-based human-machine interface terminal or server configured to provide a visual operating interface for displaying system operating status, recording historical data, and issuing maintenance commands. The Ethernet interface is further reused here, configured to establish a communication connection with the platform screen door monitoring module, constructing a high-speed data transmission channel between the safety control module and the monitoring level.

[0054] In a specific implementation, data interaction is divided into two directions: uplink monitoring and downlink maintenance. In the downlink maintenance direction, maintenance personnel input specific maintenance requests through the operating interface of the platform screen door monitoring module. The platform screen door monitoring module generates maintenance instructions based on these requests and sends them to the safety control module via Ethernet. The safety control module receives these instructions through the Ethernet interface and executes the corresponding operations. Specifically, when receiving a door control unit parameter setting query instruction, the safety control module reads the current operating parameters of the door control unit (such as opening speed, closing torque, etc.) via the CAN bus and provides feedback; when receiving a cyclic test instruction, the safety control module, under the premise of meeting safety conditions, controls the platform screen door to perform automatic opening / closing aging tests to verify the system's stability.

[0055] In the uplink monitoring direction, the safety control module acts as a data aggregation center, collecting status data from various interfaces and subsystems in real time and packaging it into comprehensive monitoring data. The safety control module periodically sends this comprehensive monitoring data to the platform screen door monitoring module via the Ethernet interface, or when status changes occur. This comprehensive monitoring data covers all aspects of the system, including: gate control unit status information reflecting the health of the underlying actuators; safety loop status information reflecting the system's safety interlocking logic; local control panel operation status information and comprehensive backup panel operation status information reflecting manual intervention; and fault alarm information reflecting various abnormal situations. Upon receiving the above data, the platform screen door monitoring module updates the equipment status icons on the graphical interface, records event logs, and issues an alarm via sound or color change when a fault alarm is detected, alerting on-duty personnel.

[0056] In summary, this embodiment combines the above embodiments with... Figure 2 The overall architecture and communication logic of the platform screen door control system of this application are described. Figure 2 This is a schematic diagram of the overall architecture and communication logic of a platform door control system provided by the present invention. Figure 2 As shown, the system is based on IPDC and interacts with external devices through various communication interfaces. It mainly includes the safety control module PEDC and the platform door monitoring module MMS.

[0057] Firstly, regarding the interface between the PEDC and the VOBC signaling system (shown as ① in the diagram), the system uses an Ethernet interface for direct communication. The PEDC, acting as the transmitter, sends key information such as the summarized platform door status, gap detection status, platform door fault and isolation status, and the Platform Automatic Operation (FAO) button status to the onboard controller VOBC, providing a basis for decision-making for safe train operation. Conversely, the VOBC, acting as the transmitter, sends platform door opening / closing commands, gap detection commands, and door fault isolation information to the PEDC through this Ethernet interface. This bidirectional direct Ethernet connection mode ensures high real-time performance and rich information content in control command issuance and status feedback.

[0058] Secondly, regarding hardware control and manual intervention (as shown in ② in the diagram), the PEDC connects to multiple external devices via a hardwired relay interface. In the input direction, the PEDC collects real-time data on the door opening / closing relay status from the Integrated Backup Panel (IBP) and the Local Control Panel (PSL), acquires operation signals from platform FAO buttons (including door opening, door closing, and departure buttons), and the hardwired detection results from the gap detection system. In the output direction, the PEDC drives relays via hardwired connections, feeding back door closing, door opening / closing indications, and interlock release status to the IBP and PSL; it also sends start or stop relay drive signals to the gap detection module. Furthermore, the door control unit includes N uplink DCUs and N downlink DCUs; the N uplink DCUs are connected to the PEDC's hardwired interface via a single cable connector, and the N downlink DCUs are connected to the PEDC's hardwired interface via a single cable connector. The PEDC directly sends door opening / closing relay drive signals to the N uplink and N downlink DCUs respectively to ensure the highest level of safety in the execution of actions.

[0059] Regarding the deep interaction of the gap detection system (shown as ③ in the figure), the PEDC connects to the gap detection module GDS via an Ethernet interface. The PEDC sends a gap detection request message to initiate a diagnostic session, while the gap detection module provides detailed diagnostic data, including fault information for each light curtain, bypass status, specific obstacle location information, overall bypass status, system-level fault information, and communication link status. This compensates for the limitation of hard-wired interfaces, which can only transmit simple switching signals.

[0060] In terms of low-level device monitoring (as shown in ④ in the diagram), the PEDC connects N uplink DCUs and N downlink DCUs via a CAN bus interface. The PEDC acts as a gateway, forwarding parameter setting queries or loop test commands from the MMS to the DCUs. The DCUs then upload the status information and parameter update status of their uplink and downlink ports via the CAN bus, enabling fine-grained monitoring of the motor and door status.

[0061] The PEDC and MMS within the IPDC are also connected via an Ethernet interface (shown as ⑤ in the diagram). The MMS sends maintenance commands to the PEDC, such as DCU parameter queries or test commands. The PEDC, in turn, sends comprehensive system status data to the MMS, including uplink and downlink DCU status, various operation permission statuses (IBP / PSL / interlock release), specific door opening and closing operation feedback, door closing and cascading status, safety loop status, and various fault alarm information, for the MMS to display and record on its interface.

[0062] In addition, the MMS is also responsible for interacting with external auxiliary systems. Through the RS485 serial interface (shown as ⑥ in the diagram), the MMS receives AC input voltage, DC output voltage, battery voltage, and module fault information from the power supply system, enabling monitoring of power quality. Through the Ethernet interface (shown as ⑦ in the diagram), the MMS sends its processed data to the Station Integrated Monitoring System (ISCS) for unified management across the entire station.

[0063] Finally, the PEDC also maintains an Ethernet connection with the ground control interlocking module (CI) of the signaling system, as shown in number ⑧ in the diagram. The PEDC sends the platform door opening / closing status, bypass status, and gap detection-related status information to the CI for monitoring and display within the interlocking system. The CI, in turn, periodically sends empty GAL header information to maintain a communication heartbeat between the two parties, ensuring the effectiveness of the link.

[0064] This embodiment also provides a platform screen door control method, which is applied to the aforementioned platform screen door control system IPDC. (Refer to...) Figure 3 , Figure 3 This is a flowchart illustrating the platform screen door control method provided by the present invention. The core process of this method includes receiving control commands and executing driving actions, specifically implemented through the following steps 101 to 102: Step 101: Receive platform door control information sent by the vehicle controller via the Ethernet interface, and generate platform door drive signals based on the platform door control information.

[0065] In this step, the safety control module of the platform screen door control system continuously monitors the data stream on the Ethernet interface. The onboard controller, as the main control device for train operation, generates platform screen door control information, including door opening / closing commands and door isolation status, based on the train's real-time location, station status, and predetermined door actions. This information is encapsulated in Ethernet data packets conforming to secure communication protocols (such as RSSP-I or proprietary security protocols) and sent directly to the safety control module.

[0066] Upon receiving a data packet, the safety control module first performs protocol parsing and security verification (such as CRC check and serial number check) to ensure data integrity and timeliness. After successful verification, the safety control module extracts the platform screen door control information. Subsequently, the safety control module performs logical operations based on the current system's internal state (such as whether it is in interlock release mode or whether there is an emergency stop signal). If the logical judgment result allows the execution of the instruction, the safety control module generates the corresponding platform screen door drive signal. This drive signal is a low-voltage level signal or pulse signal output from the internal logic circuit of the safety control module, used to subsequently trigger the hardware drive circuit.

[0067] Step 102: Transmit the platform door drive signal to the door control unit through the hard-wire interface to drive the door control unit to perform the opening or closing action of the platform door.

[0068] In this step, to ensure absolute reliability of control actions, the system employs physically isolated hard-wired transmission. The drive circuit inside the safety control module converts the platform door drive signal in logic level form generated in step 101 into a power signal, typically driving the coil of the safety relay. The contacts of the safety relay close or open, thereby outputting a specified control voltage (such as DC 24V or DC 110V) to the door control unit through the first hard-wired interface.

[0069] After detecting the change in control voltage through its hardwired input port, the door control unit immediately activates its internal motor control program. This program controls a brushless DC motor or servo motor to operate according to a preset speed curve, driving the transmission mechanism (such as a lead screw or belt) and thus propelling the sliding door of the platform screen door to open or close. During this process, the door control unit continuously monitors the door's running resistance and position to ensure strict synchronization between the actions and the onboard controller's commands. This method of "Ethernet command transmission and hardwired drive transmission" leverages the efficiency of network communication while ensuring high security in the execution process.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A platform screen door control system, characterized in that, Includes a security control module, an Ethernet interface, and a hard-wired interface; The Ethernet interface is configured to establish a communication connection with the vehicle controller; the hardwired interface is configured to connect to the gate control unit. The safety control module is used to receive platform door control information sent by the vehicle controller through the Ethernet interface, and generate platform door drive signals according to the platform door control information. The safety control module is also used to transmit the platform door drive signal to the door control unit through the hard-wired interface, so as to drive the door control unit to perform the opening or closing action of the platform door.

2. The platform screen door control system according to claim 1, characterized in that, The safety control module is also used to acquire the operating status data of the platform door module and generate the platform door feedback information based on the operating status data; The safety control module is also used to transmit the platform door feedback information to the vehicle controller via the Ethernet interface.

3. The platform screen door control system according to claim 2, characterized in that, The platform door feedback information includes at least one of the following: platform fully automatic operation button status information, gap detection status information, and platform door fault isolation information; The platform fully automatic operation button status information represents the operation status of the door opening button, door closing button, or departure button set on the platform; the gap detection status information represents the detection result of the gap between the train and the platform door.

4. The platform screen door control system according to claim 1, characterized in that, The system also includes a CAN bus interface; The CAN bus interface is configured to establish a communication connection with the gating unit; The safety control module is also used to receive gate control unit monitoring information sent by the gate control unit through the CAN bus interface; The door control unit monitoring information includes at least one of the following: DCU detection status, sliding door closing fault status, sliding door opening fault status, and motor fault status.

5. The platform screen door control system according to claim 1, characterized in that, The Ethernet interface is also configured to establish a communication connection with the gap detection module; the hardwire interface is also configured to connect to the gap detection module. The safety control module is used to send a start control signal or a stop control signal to the gap detection module through the hard wire interface; The safety control module is also used to receive gap detection diagnostic information sent by the gap detection module through the Ethernet interface; The gap detection and diagnostic information includes at least one of the following: light curtain fault information, light curtain bypass information, light curtain obstacle information, safety circuit status information, and communication status information.

6. The platform screen door control system according to claim 5, characterized in that, The hard-wired interface is also configured to connect to the local control panel and the integrated backup panel; The safety control module is also used to receive platform-level door opening and closing commands sent by the local control panel and emergency-level door opening and closing commands sent by the integrated backup panel through the hard-wired interface. The security control module is specifically configured as follows: Priority identification is performed on the platform door control information, the platform-level door opening and closing commands, and the emergency-level door opening and closing commands; Based on the priority identification result, a response is selected to generate the platform door drive signal.

7. The platform screen door control system according to claim 1, characterized in that, The Ethernet interface is also configured to establish a communication connection with the computer interlocking module; The safety control module is also used to send platform door monitoring information to the computer interlocking module through the Ethernet interface; The security control module is also used to receive communication hold messages sent by the computer interlocking module through the Ethernet interface in order to maintain communication with the computer interlocking module. The platform door monitoring information includes at least one of the following: platform door open status, platform door closed status, platform door bypass status, gap detection status, gap detection activation status, and gap detection bypass status.

8. The platform screen door control system according to claim 1, characterized in that, The system also includes a platform door monitoring module; The Ethernet interface is also configured to establish a communication connection with the platform door monitoring module; The safety control module is also used to receive maintenance instructions sent by the platform door monitoring module through the Ethernet interface, and to perform corresponding query or test operations according to the maintenance instructions; The safety control module is also used to send comprehensive monitoring data to the platform door monitoring module through the Ethernet interface, so that the platform door monitoring module can display the status or issue an alarm. The maintenance instructions include gate control unit parameter setting query instructions or loop test instructions; The comprehensive monitoring data includes at least one of the following: gate control unit status information, safety circuit status information, local control panel operation status information, comprehensive backup panel operation status information, and fault alarm information.

9. The platform screen door control system according to claim 1, characterized in that, The security control module is configured to use a 2x2 redundancy check architecture.

10. A platform screen door control method, characterized in that, include: The system receives platform door control information sent by the vehicle controller via an Ethernet interface and generates platform door drive signals based on the platform door control information. The platform door drive signal is transmitted to the door control unit through a hard-wired interface to drive the door control unit to perform the opening or closing action of the platform door.

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