A subway platform door control system and method

Abstract

The present invention provides a control system and method for subway platform screen doors. The control system includes: a communication-based automatic train control system (CBTC), a train control center, a central control panel (CCP) located at each subway station, and several door control units. The CBTC continuously sends invalid door control instructions to the platform control unit (PEDC) on each CCP via a network path according to a preset period. Based on the invalid door control instructions received, the platform control unit sends corresponding invalid control instructions that do not need to be executed to the door control units under its control. The door control units of the subway platform screen doors determine whether a verified invalid control instruction has been received within a predetermined time interval. If not, the corresponding platform control unit is determined to be faulty and the subway platform screen doors controlled by it are locked. The technical solution of the present invention can quickly detect faults caused by the platform controller and lock the subway platform screen doors, avoiding safety accidents.

Description

Technical Field

[0001] The technical solution provided by the present invention relates to the field of subway platform screen door safety control, and specifically to a subway platform screen door control system and method. Background Art

[0002] With the rapid development of subways and the advancement of information technology, subway platform screen door central control panels (PSCs) serve as a barrier for passengers waiting for trains, ensuring the safety of every passenger. Consequently, the need to develop safety control technology for PSC systems has become increasingly important. In recent years, domestic PSC manufacturers have dedicated themselves to the development of both subway PSC hardware and safety-critical control systems, resulting in a comprehensive product line and, to a certain extent, breaking the long-standing monopoly of foreign companies in this industry. The current technical solution uses the CAN bus protocol combined with verification technology to send control commands to the subway PSC door control unit via the platform control unit (PEDC). If a control command fails verification, it is fed back to the PEDC for retransmission.

[0003] However, in real-world operations, when a Platform Control Unit (PEDC) fails and cannot accurately process door control commands from the Train Control Center (ATC), the Door Control Unit (DCU) controlled by the faulty PEDC cannot receive accurate control commands, resulting in the corresponding subway platform doors being unable to open or close in a timely manner. This is unacceptable, as the failure to close the subway platform doors in a timely manner poses a significant safety hazard, particularly during train operation. Therefore, it is crucial to address the technical challenges of maintaining the locked subway platform doors and promptly restoring normal control of the doors when a PEDC fails. Summary of the Invention

[0004] In order to solve the above technical problems existing in the current subway platform door control system, the present invention provides a subway platform door control solution. When the platform control unit (PEDC) fails, the door control unit (DCU) it controls can detect it in time and put the corresponding subway platform door into a locked state.

[0005] A first aspect of the present invention provides a method for controlling subway platform screen doors. The method includes: configuring a communication-based automatic train control system (CBTC) to continuously send invalid gate control instructions to a platform control unit (PEDC) on each central control panel (PSC) via a network path at a preset period; the platform control unit (PEDC), based on the invalid gate control instructions received, sends corresponding invalid control instructions to the gate control units (DCUs) under its control, which do not require execution by the gate control units; when the gate control unit (DCU) does not receive a verified invalid control instruction within a predetermined time interval, it determines that the corresponding platform control unit (PEDC) has failed and simultaneously locks the subway platform screen doors it controls. The platform control unit (PEDC) also sends corresponding valid control instructions to the gate control units (DCUs) under its control based on valid gate control instructions sent to it by the train control center (ATC); and the gate control units (DCUs) control the corresponding subway platform screen doors based on the received valid control instructions.

[0006] Furthermore, the method further includes: for valid and invalid door control instructions corresponding to "opening" or "closing" a subway platform screen door, the difference between the two instructions lies solely in the value of an enable flag within the instruction content; the platform control unit (PEDC) generates a corresponding initial control instruction based on the portion of the received valid or invalid door control instruction excluding the value of the enable flag, and appends the value of the enable flag to the initial control instruction to generate the valid or invalid control instruction. In this manner, even if the platform control unit (PEDC) experiences a software failure (e.g., an error in the logic for processing door control instructions sent by the train control center (ATC)), if the controlled door control unit (DCU) sends data or instructions, the controlled door control unit (DCU) can still determine that the platform control unit (PEDC) has a software failure by verifying the received control instruction.

[0007] Furthermore, the method further includes: configuring each central control panel (PSC) to include two platform control units (PEDCs) and a corresponding backup control unit for each platform control unit (PEDC); providing a separate backup bus for each backup control unit to connect all gate control units (DCUs) controlled by the platform control unit (SPEC) it backs up, and to connect each input and output signal of its backup platform control unit (PEDC). Upon determining that a failure has occurred in its corresponding platform control unit (SPEC), each gate control unit (DCU) transmits a specific signal to its connected backup control unit. When the backup platform control unit (SPEC) is functioning normally, the backup control unit does not process input signals nor output any signals. However, upon receiving the specific signal from the gate control unit (DCU) monitoring the backup bus, it transmits a control signal via a designated pin to power off the backup platform control unit (SPEC) and resume the functions of the backup platform control unit (SPEC). In this way, when a platform control unit (PEDC) fails, the corresponding platform platform door can quickly resume normal control, making it convenient to replace or repair the failed platform control unit (PEDC).

[0008] Corresponding to the above-mentioned method, the second aspect of the present invention further provides a subway platform screen door control system. The control system includes: a communication-based automatic train control system (CBTC), a train control center (ATC), a central control panel (PSC) located at each subway station, and several door control units (DCUs). The communication-based automatic train control system (CBTC) continuously sends invalid door control instructions to the platform control unit (PEDC) on each central control panel (PSC) via a network path according to a preset period. Based on the invalid door control instructions received, the platform control unit (PEDC) sends corresponding invalid control instructions to the door control units (DCUs) under its control. The invalid control instructions do not require the door control units to execute. The door control units (DCUs) determine whether they have received a verified invalid control instruction within a predetermined time interval. If not, they determine that the corresponding platform control unit (PEDC) is faulty and lock the subway platform screen door controlled by it. When the subway platform screen door control system is in operation, it correspondingly implements the aforementioned subway platform screen door control method.

[0009] The technical solution provided by the present invention can ensure that when a platform control unit (PEDC) fails, the subway platform door is in a safe state, eliminating potential safety hazards, and at the same time ensure that the subway platform door control system can quickly resume normal operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1This is a schematic diagram of the subway platform screen door control system provided by the present invention. DETAILED DESCRIPTION

[0011] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0012] like Figure 1 The subway platform door control system provided by the present invention includes: a communication-based automatic train control system (CBTC), a train control center (ATC), a central control panel (PSC) arranged at each subway station, and several door control units (DCU).

[0013] The central control panel (PSC) is the control center of the subway platform door, and its composition structure is as follows: Figure 1 As shown, the system primarily comprises two platform control units (PEDC1 and PEDC2) for controlling platform screen doors on both sides of the subway platform. Each PEDC is responsible for controlling the platform screen doors on one side of the platform, along with backup control units (B1 and B2) for each PEDC, a system monitoring unit, and an alarm indication unit. The backup control units are connected to all door control units (DCUs) controlled by their backup platform control units (SPECs) via separate backup buses, and are also connected to all input and output signals of their backup PEDCs. For example, backup unit B1 connects to PEDC1 via separate bus 2 to control all door control units (DCUs).

[0014] The communication-based train automatic control system (CBTC) continuously sends invalid gate control instructions to the platform control unit (PEDC) on each central control panel (PSC) via a network path at a preset period. When the platform control unit (PEDC) receives the invalid gate control instruction, it sends a corresponding invalid control instruction to the gate control unit (DCU) under its control. The gate control unit (DCU) does not need to execute the invalid control instruction. The gate control unit (DCU) determines whether it has received a verified invalid control instruction within a predetermined time interval. If not, it determines that the corresponding platform control unit (PEDC) is faulty and locks the subway platform screen doors it controls.

[0015] The platform control unit (PEDC) also sends corresponding valid control instructions to the door control units (DCUs) under its control based on valid door control instructions sent to it by the train control center (ATC). The DCUs then control the corresponding subway platform screen doors based on the received valid control instructions. This configuration ensures that if the platform control unit (PEDC) fails and is unable to promptly issue a verified invalid control instruction to the door control units it controls, the platform screen doors will be locked promptly, preventing safety accidents.

[0016] Furthermore, for the valid and invalid door control instructions corresponding to "opening" or "closing" the subway platform screen doors, the difference between the two is the value of the enable flag in the instruction content. The platform control unit (PEDC) generates a corresponding initial control instruction based on the remaining portion of the received valid / invalid door control instruction, excluding the value of the enable flag, and appends the value of the enable flag to the initial control instruction to generate the valid or invalid control instruction. In this way, even if the platform control unit (PEDC) experiences a software failure (e.g., an error in the logic for processing door control instructions sent by the train control center (ATC)), but can still send data / instructions to its controlled door control unit (DCU), the controlled door control unit (DCU) can still determine that the platform control unit (PEDC) has a software failure by verifying the received control instruction and thus promptly lock the subway platform screen doors.

[0017] Furthermore, when all gate control units (DCU) determine that their corresponding station control units (SPEC) have failed, they also send a specific signal to the backup control unit to which they are connected. When the station control unit (SPEC) it backs up is working normally, the backup control unit does not process the received input signal nor output any signal; when it receives the specific signal sent to it by the gate control unit (DCU) on the backup bus, it sends a control signal through the designated pin to cut off the power supply of the station control unit (SPEC) it backs up, and executes the function of the station control unit (SPEC) it backs up. For example, when Figure 1 When platform controller PEDC1 fails, its backup control unit B1, upon receiving a specific signal via bus 2, disconnects PEDC1 from power, rendering it inoperable and then controls the door control unit originally controlled by PEDC1. This configuration allows the backup control unit to quickly take over the operations of its backup platform control unit (PEDC) when a platform control unit (PEDC) fails, quickly restoring normal control of the subway platform doors originally controlled by that control unit and facilitating replacement or repair of the failed platform control unit (PEDC).

[0018] Corresponding to the above-mentioned system, the present invention also provides a method for controlling subway platform screen doors. The method includes: configuring a communication-based automatic train control system (CBTC) to continuously send invalid gate control instructions to each platform control unit (PEDC) on a central control panel (PSC) via a network path according to a preset period; the platform control unit (PEDC), based on the invalid gate control instructions received, sends corresponding invalid control instructions to the gate control unit (DCU) under its control, which does not require the gate control unit to execute the invalid control instructions; when the gate control unit (DCU) of the subway platform screen door does not receive a verified invalid control instruction within a predetermined time interval, the corresponding platform control unit (PEDC) is determined to be faulty and simultaneously locks the subway platform screen door it controls. The platform control unit (PEDC) also sends corresponding valid control instructions to the gate control unit (DCU) under its control based on valid gate control instructions sent to it by the train control center (ATC); and the gate control unit (DCU) controls the corresponding subway platform screen door based on the received valid control instructions.

[0019] Furthermore, the method further includes: configuring each central control panel (PSC) to include two platform control units (PEDCs) and a corresponding backup control unit for each platform control unit (PEDC). Each backup control unit is provided with a separate backup bus for connecting all gate control units (DCUs) controlled by the platform control unit (SPEC) it backs up, and for connecting each input and output signal of its backup platform control unit (PEDC). Upon determining that a failure has occurred in its corresponding platform control unit (SPEC), each gate control unit (DCU) sends a specific signal to its connected backup control unit. When the backup platform control unit (SPEC) is functioning normally, the backup control unit neither processes the received input signal nor outputs any signal. Upon receiving the specific signal from the gate control unit (DCU) monitoring the backup bus, the backup control unit sends a control signal via a designated pin to power off the backup platform control unit (SPEC) and perform the functions of the backup platform control unit (SPEC).

[0020] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A subway platform door control system, characterized in that: The control system includes: a communication-based automatic train control system (CBTC), a train control center (ATC), a central control panel (PSC) arranged at each subway station, and several door control units (DCU); The communication-based train automatic control system (CBTC) continuously sends an invalid gate control instruction to the platform control unit (PEDC) on each central control panel (PSC) through a network path according to a preset period; each central control panel (PSC) includes: two sets of platform control units (PEDC) and a backup control unit corresponding to each set of platform control units (PEDC); The platform control unit (PEDC) sends a corresponding invalid control instruction to a gate control unit (DCU) controlled by the PEDC based on the received invalid gate control instruction, wherein the invalid control instruction does not need to be executed by the gate control unit; The door control unit (DCU) determines whether an invalid control instruction that has been verified to be correct is received within a predetermined time interval. If not, it determines that the corresponding platform control unit (PEDC) is faulty and simultaneously locks the subway platform screen door controlled by itself; The platform control unit (PEDC) also sends corresponding valid control instructions to the door control unit (DCU) under its control based on the valid door control instructions received from the train control center (ATC); the door control unit (DCU) controls the corresponding subway platform screen door based on the valid control instructions it receives.

2. The subway platform door control system according to claim 1, characterized in that: For the valid gate control instructions and invalid gate control instructions corresponding to "opening" or "closing" the subway platform screen doors, the only difference between the two is the value of the enable flag in the instruction content; the platform control unit (PEDC) generates a corresponding initial control instruction based on the other parts of the received valid gate control instruction / invalid gate control instruction except the value of the enable flag, and appends the value of the enable flag to the initial control instruction to generate a valid control instruction or an invalid control instruction.

3. The subway platform door control system according to claim 2, characterized in that: The backup control unit is connected to all gate control units (DCUs) controlled by its backup platform control unit (SPEC) through a separate backup bus, and is also connected to each input signal and output signal of its backup platform control unit (PEDC). When the gate control unit (DCU) determines that its corresponding platform control unit (PEDC) has failed, it sends a specific signal to the backup control unit to which it is connected. When the backup station control unit (SPEC) is operating normally, the backup control unit does not process each input signal and does not output any signal; When it receives the specific signal sent from the gate control unit (DCU) on the backup bus, it sends a control signal through the designated pin to cut off the power supply of the station control unit (SPEC) it backs up, and executes the function of the station control unit (SPEC) it backs up.

4. A subway platform door control method, characterized in that: The method includes: setting a communication-based train automatic control system (CBTC) to continuously send invalid gate control instructions to a platform control unit (PEDC) on each central control panel (PSC) through a network path at a preset period; the platform control unit (PEDC) sends a corresponding invalid control instruction to a gate control unit (DCU) under its control based on the received invalid gate control instruction, and the invalid control instruction does not need to be executed by the gate control unit; when the gate control unit (DCU) does not receive a verified invalid control instruction within a predetermined time interval, it determines that the corresponding platform control unit (PEDC) has a fault and simultaneously locks the subway platform screen door controlled by itself.

5. The subway platform door control method according to claim 4, characterized in that: The method also includes: the platform control unit (PEDC) sends corresponding valid control instructions to the door control unit (DCU) under its control based on the valid door control instructions received from the train control center (ATC); the door control unit (DCU) controls the corresponding subway platform screen door based on the received valid control instructions.

6. The subway platform door control method according to claim 5, characterized in that: For the valid gate control instructions and invalid gate control instructions corresponding to "opening" or "closing" the subway platform screen doors, the only difference between the two is the value of the enable flag in the instruction content; the platform control unit (PEDC) generates a corresponding initial control instruction based on the other parts of the received valid gate control instruction / invalid gate control instruction except the value of the enable flag, and appends the value of the enable flag to the initial control instruction to generate a valid control instruction or an invalid control instruction.

7. The subway platform door control method according to claim 6, characterized in that: The method further includes: arranging each of the central control panels (PSC) to include: two sets of platform control units (PEDCs), and a backup control unit corresponding to each set of platform control units (PEDCs); arranging a separate backup bus for each backup control unit to connect all gate control units (DCUs) controlled by the platform control unit (SPEC) it backs up, and simultaneously connecting each input signal and output signal of its backup platform control unit (PEDC); when the gate control unit (DCU) determines that its corresponding platform control unit (SPEC) has failed, it sends a specific signal to the backup control unit to which it is connected; when the platform control unit (SPEC) it backs up is operating normally, the backup control unit does not process the received input signal nor output any signal, and when it receives the specific signal sent to it by the gate control unit (DCU) on the backup bus, it sends a control signal through a designated pin to cut off the power supply of the platform control unit (SPEC) it backs up, and executes the function of the platform control unit (SPEC) it backs up.

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