A redundant control system for subway platform doors and a method for dual-system operation.

Abstract

This invention discloses a redundant control system for subway platform screen doors and a method for dual-system operation, relating to the field of subway platform screen door system upgrade and renovation technology. The method includes the following steps: First, the communication method and data of the platform screen door system's DCU are analyzed, and a data processing host is added based on the analysis results. The added data processing host is then connected to a replacement DCU. The data from the two systems are merged and processed by the data processing host and sent to the integrated monitoring system. Next, the DCU program and default parameters are modified to maintain the deviation from the original system's sliding door within the user's required range. Finally, after completing the component design optimization, the platform components in the platform screen door system are gradually replaced. During the replacement process, a dual-system parallel mode is used. After all replacements are completed, the system returns to normal single-system operation mode. This invention effectively reduces the impact on subway operation during the replacement of the platform screen door system and ensures the normal functioning of the platform screen door system during the replacement process.

Description

Technical Field

[0001] This invention belongs to the technical field of subway platform screen door system upgrade and renovation, specifically involving a subway platform screen door redundant control system and a method for dual-system operation. Background Technology

[0002] Platform screen doors (PSM) are installed along the edge of urban rail transit station platforms to isolate the waiting area from the track area. They correspond to train doors and are a type of electromechanical equipment system. The application of PSMs isolates passengers from the tracks and trains, improving operational safety, enhancing the waiting environment, and helping to save on operating and construction costs.

[0003] However, as the subway's operating years continue to increase, more and more platform screen door components have reached their expected service life, and the equipment performance can no longer meet the subway's operational needs. If they continue to be used, there will be significant operational risks. At this point, it is necessary to replace the components that have reached their expected service life to restore the equipment's operational status.

[0004] When replacing platform screen door systems, most components have an expected lifespan of about 10 years. By the time they reach their expected lifespan, most components have been discontinued or can no longer meet the needs of subway operations. Therefore, it is necessary to use other models or even other brands of equipment to partially or completely replace them. However, since each manufacturer has its own proprietary products for core components and the specific definitions of communication protocols are not disclosed to the public, when replacing platform screen door equipment of different brands, the core components that have been used and matured in their own applications are used to directly replace them on site to ensure the reliability of the system operation after replacement.

[0005] When replacing equipment on operating lines, it can only be done during the nighttime hours after the subway stops operating. However, due to the short construction time at night and the large amount of work involved, it takes a long time to replace all the platform screen door components that have reached their expected service life. Furthermore, communication problems often occur during the replacement process, which can easily lead to communication failures. In addition, since the newly replaced components are different from the original system, there are certain control compatibility issues and synchronization problems when opening and closing the doors when adjusting the control system. As a result, subway operations are affected, and the normal functioning of the subway platform screen door system is compromised. Summary of the Invention

[0006] To address the shortcomings of replacing existing platform screen door systems on operational subway lines, such as large workload, long time consumption, and easy occurrence of communication problems, control compatibility issues, and door opening / closing synchronization problems, this invention provides a redundant control system for subway platform screen doors and a method for dual-system operation. This ensures the normal operation of the platform screen door system during the replacement process and effectively reduces the impact of platform screen door system replacement on subway operations.

[0007] The solution adopted by this invention to solve its technical problem is: a dual-system operation method for a redundant control system for subway platform doors, comprising the following steps:

[0008] Step 1: Analyze the communication method of the original platform door system DCU and determine whether the original communication method is the same as the replacement DCU. If they are the same, analyze the communication data. If the original communication method is different from the replacement DCU, or the communication data cannot be analyzed, or there are new functions, add a data processing host.

[0009] Step 2: Connect the newly added data processing host to the replacement DCU and upload the data from the replacement DCU to the data processing host; for the DCU that has not been replaced, its data will still be processed by the original system and sent to the data processing host through the original interface connected to the integrated monitoring system; the data processing host will merge the data from the two systems and then send the data to the integrated monitoring system.

[0010] Step 3: Modify the judgment logic of the whole-side door opening and closing control command in the DCU program according to the original system's whole-side door opening and closing control method to achieve the universality of the interface; and combine the original system's whole-side door opening and closing command control method, modify the current limiting resistor value according to the original system's whole-side door opening and closing command voltage to achieve voltage universality.

[0011] Step 4: Determine whether the PSC cabinet needs to be replaced or modified. When the DCU cannot be directly compatible with the control and the original control system PSC cabinet needs to be replaced, add a temporary control unit, a temporary power supply unit and a DCU control cable for the platform door system. The temporary control unit has the same logic control principle and operating voltage as the original system. The DCU's door opening and closing output commands and operating voltage are matched according to the control requirements of the replaced DCU. The temporary power supply unit supplies power to the temporary control unit and transmits door opening and closing control commands to the replaced DCU through the DCU control cable.

[0012] Step 5: Detect the opening and closing status of the sliding door in the original system, and determine whether the deviation of the sliding door action between the two systems meets the user's requirements. If the requirements cannot be met, modify and replace the DCU program and default parameters to keep the above status and the deviation of the sliding door in the original system within the range required by the user.

[0013] Step Six: After completing the design optimization of the components through the above steps, begin the gradual replacement of the platform components in the platform door system. After the platform components are replaced, replace or modify the PSC cabinet to meet the sliding door control requirements. During the replacement process, a dual-system parallel mode is used. After all replacements are completed, remove the data processing host, temporary control unit, and temporary power supply unit, and restore the normal cable wiring. The new system will then be fully responsible for overall control, and the platform door system will return to normal single-system operation mode.

[0014] Furthermore, the added data processing host has a single sliding door status shielding function.

[0015] Furthermore, the DCU's whole-side door opening and closing command detection adopts a low operating voltage and multi-loop design, and the whole-side door opening and closing command and safety loop can also achieve universality through the addition of an interface conversion circuit for the sliding door.

[0016] Furthermore, when replacing the DCU requires adding a safety loop breakpoint detection function, if the power supply voltage and control method of the safety loops of the two systems are the same, the safety loop status is fed back to the signal system through the original system PSC cabinet; if the power supply voltage or control method of the safety loops of the two systems are different, a new safety loop cable is added to form an independent safety loop with the newly replaced sliding door, and the replaced DCU performs safety loop breakpoint detection based on the sliding door status and the safety loop status.

[0017] Furthermore, the opening and closing status of the original system sliding door is detected. The status includes the process from when the sliding door receives the opening and closing command to when the gate lock is activated, the sliding door opening action stops, the sliding door closing action stops, and the door status indicator light flashes during the opening and closing process.

[0018] Furthermore, the temporary control unit of the platform screen door system is equipped with a door opening and closing command delay circuit at its output terminal. By adjusting the circuit parameters, the time when the temporary control unit issues the door opening and closing command is delayed, thus maintaining the synchronicity of the sliding door's opening and closing actions.

[0019] This invention also provides a redundant control system for subway platform doors, including an integrated monitoring system, a data processing host, a primary system PSC cabinet, a temporary control unit, and a temporary power supply unit. The integrated monitoring system is connected to the data processing host, and the temporary control unit is connected in parallel to the data processing host with the PSC cabinet. Each sliding door is connected to the temporary control unit and the PSC cabinet via a communication data line. When replacing the platform door system, the dual-system operation method of the redundant control system for subway platform doors provided by this invention is executed.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The present invention provides a redundant control system for subway platform doors and a method for dual-system operation. During the replacement process, only the sliding doors under construction are affected, while the normal functions of other sliding doors are not affected. Moreover, the brand selection is more flexible. After the optimization and replacement using the method of the present invention, the issue of compatibility with the original system does not need to be considered. Brands with better performance and higher quality can be selected to replace the components.

[0022] This invention effectively solves the communication, control compatibility, and door opening / closing synchronization problems during the replacement of platform screen door systems on normally operating lines, thereby ensuring the normal operation of the platform screen door system during the replacement process. It can effectively reduce the impact of platform screen door system replacement on subway operations and has strong applicability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the system of the present invention;

[0024] Figure 2 This is a schematic diagram of the safety circuit of the present invention;

[0025] Figure 3 This is a schematic diagram of the sliding door interface conversion circuit of the present invention;

[0026] Figure 4 This is the DCU logic state table of the present invention. Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Please see Figure 1-4 This invention provides a technical solution for a redundant control system for subway platform doors and a method for dual-system operation: Example

[0029] This embodiment provides a dual-system operation method for a redundant control system for subway platform doors. Based on actual on-site requirements, the operation first involves optimizing the design of the system corresponding to the component to be replaced, completing the replacement of the platform component. Then, the original system's PSC cabinet is replaced or modified to meet the sliding door control requirements. Finally, the added system is removed, restoring the single-system normal operation of the platform door system. The specific steps include:

[0030] Step 1: Identify the gate control unit (DCU) that needs to be replaced, and parse the communication method and communication data of the original system's gate control unit (DCU). Determine whether the original communication method is the same as the replacement DCU. If the original communication method is the same as the replacement DCU, parse the communication data. During the replacement process, all types of communication data should remain consistent with the original system. If the original communication method is different from the replacement DCU, or the communication data cannot be parsed, or there are new functions, add a data processing host.

[0031] The newly added data processing host has a single sliding door status shielding function. After the DCU replacement work begins, the data processing host cancels the sliding door status shielding status of the replaced DCU in the new system's transmitted data, and shields the sliding door status of the replaced DCU in the original system's transmitted data, thereby ensuring the accuracy of the platform door data.

[0032] Step 2: Using the DCU communication cable, connect one end to the newly added data processing host and the other end to the replacement DCU, and upload the data from the replacement DCU to the data processing host for processing.

[0033] For the DCU that needs to be replaced, disconnect the original communication line connected to the integrated monitoring system and switch it to connect to the data processing host. That is, disconnect the DCU communication cable, control cable and safety loop cable between the last end of the original system cable and the previous sliding door, add a new DCU communication cable, control cable and safety loop cable and connect them to the input terminal of the terminal block at the last end of the original system cable. When replacing other sliding doors, disconnect the corresponding sliding door from the original system and connect the command line of the last terminal block output terminal to the input terminal of the other sliding door. This completes the replacement of the relevant components of the entire sliding door. After the modification is completed, the newly added cable is permanently retained as a control loop line.

[0034] For the DCUs that are not replaced, their data are still processed by the original system, and the processed data is sent to the data processing host through the original interface connected to the integrated monitoring system. The data processing host merges the data from the two systems and sends the relevant data to the integrated monitoring system according to the communication protocol and data definition. During the replacement process, the dual-system parallel mode is used. After the replacement is completed, the new system completes the overall control, and the platform screen door system returns to the single-system operation mode.

[0035] Step 3: Modify the overall door opening and closing command judgment logic in the DCU program according to the original system's overall door opening and closing control method to achieve interface universality. The DCU overall door opening and closing command detection adopts a low operating voltage and multi-loop design. The door opening and closing command detection circuit is equipped with a current limiting circuit. When the original system's overall door opening and closing command is DC, the DCU modifies the current limiting resistor value according to the original system's overall door opening and closing control command voltage, thereby achieving voltage universality. The overall door opening and closing command and safety circuit can also achieve universality by adding an interface conversion circuit to the sliding door.

[0036] Step 4: When the DCU cannot be directly compatible with the control and the original control system PSC cabinet needs to be replaced, a temporary control unit, a temporary power supply unit, and a DCU control cable can be added to the platform screen door system. The temporary control unit has the same logic control principle and operating voltage as the original system. The entire side door opening and closing output command and operating voltage are designed according to the control requirements of the replaced DCU. The temporary power supply unit supplies power to the temporary control unit and transmits door opening and closing control commands to the replaced DCU through the DCU control cable. Due to the possibility of inconsistent power supply voltage in the control system, the temporary control unit is used for power supply before the platform equipment modification is completed. The temporary control unit needs to be equipped with a battery to meet the control requirements of the platform screen door system during power outages. After the modification is completed, the replaced power supply system will provide power. Furthermore, when the power supply to the gate is inconsistent, a gate power conversion module can be added to achieve power supply consistency.

[0037] In addition, when the original system's door opening and closing response time is faster than that of the replacement component, a door opening and closing command delay circuit is also set at the output end of the temporary control unit of the platform door system. By adjusting the circuit parameters, the time when the temporary control unit issues the door opening and closing command is delayed, so as to maintain the synchronicity of the sliding door's opening and closing actions.

[0038] When replacing the DCU requires adding a safety loop breakpoint detection function, if the power supply voltage and control method of the safety loops of the two systems are the same, the safety loop status is fed back to the signal system through the original system PSC cabinet; if the power supply voltage or control method of the safety loops of the two systems are different, a new safety loop cable is added to form an independent safety loop with the newly replaced sliding door. The replacement DCU performs safety loop breakpoint detection based on the sliding door status and the safety loop status. The new safety loop is connected in series with the safety loop of the original system through the output terminal of the voltage controller with isolation function to form a complete platform door system safety loop.

[0039] Step 5: Detect the opening and closing status of the sliding door in the original system and determine whether the deviation range of the sliding door's operation between the two systems meets the requirements of the user's specifications. Specifically, when detecting the opening and closing status of the sliding door in the original system, the status includes, but is not limited to: from the time the sliding door receives the opening and closing command to the time the sliding door completes the opening and closing operation, the door lock action, the cessation of the sliding door's opening action, the cessation of the sliding door's closing action, and the flashing of the door status indicator light during the opening and closing process.

[0040] By detecting the process from the original system's sliding door receiving the overall opening / closing command to the sliding door completing the opening / closing action, including the manual opening / closing command, the action of the gate lock, the cessation of the sliding door's opening and closing actions, and the flashing of the door status indicator light during the opening / closing process, the DCU program and default parameters are modified to ensure that the relevant states deviate from the original system's sliding door within the user's required range. That is, when the deviation range between the replaced DCU and the original system's actions meets the user's requirements, there is no need to modify the replaced DCU program; otherwise, it is necessary to modify the replaced DCU program and default parameters to ensure that the relevant states deviate from the original system's sliding door within the user's required range.

[0041] It is also necessary to analyze the power supply capacity of the low-voltage power distribution system and the cable drive capacity of the replaced system. It can only continue to be used if the requirements are met. If the requirements are not met, it needs to be replaced at the same time. Furthermore, the operating status of the signal system needs to be confirmed during the replacement. If there is no change in the system, the existing system interface should be maintained. However, if there is a possibility of interface changes in the future, relevant upgrade interfaces need to be reserved.

[0042] It should be noted that during the replacement process, the DCU program needs to be temporarily adjusted in conjunction with the original platform screen door system. After the replacement is completed, the DCU program will be adjusted back to the original version to ensure program stability.

[0043] Step Six: After completing the design optimization of the components through the above steps, the platform door system will gradually replace the platform components in the order of redundant control system, cables, and sliding doors. After the platform components are replaced, the PSC cabinet will be replaced or modified to meet the sliding door control requirements. During the replacement process, a dual-system parallel mode will be used. After all replacements are completed, the data processing host, temporary control unit, and temporary power supply unit will be removed, and the cables will be restored to normal wiring. The new system will then be responsible for overall control, and the platform door system will return to normal single-system operation mode.

[0044] This embodiment is combined with, for example Figure 2 The schematic diagram of the safety circuit shown is accompanied by an explanation of its replacement process:

[0045] Before the replacement work began, the platform screen door system only had safety circuit 1. After all the sliding doors on the side were closed and locked, the safety circuit relay of the PSC cabinet would activate and send a message to the signal system that the doors were fully closed and locked. After the signal system received this message, the train could enter and exit the station normally.

[0046] After the replacement work begins, the sliding doors that are not replaced will continue to use safety circuit 1. A normally open contact K1-1 of the relay is added to safety circuit 1. After all the sliding doors inside safety circuit 1 are closed and locked, the PSC cabinet safety circuit relay will not operate because K1-1 is not closed.

[0047] The replaced sliding doors form safety circuit 2. After all the sliding doors inside safety circuit 2 are closed and locked, relay K1 is activated, the normally open contact K1-1 of the relay is closed, the safety circuit relay of PSC cabinet is activated, and the door is sent to the signal system as fully closed and locked. After the signal system receives the information, the train can enter and exit the station normally.

[0048] Furthermore, if any sliding door is not closed and locked during the replacement process, the PSC cabinet safety circuit relay will not be able to operate. The platform door system can normally report the safety circuit status to the signal system through safety circuit 1 and safety circuit 2.

[0049] After the replacement work is completed, remove relay K1 and connect the sliding door end in safety circuit 2 to the safety circuit relay of the PSC cabinet to complete the safety circuit modification process.

[0050] This embodiment combines Figure 3 Sliding door interface conversion circuit schematic and Figure 4 Regarding the DCU logic state table, taking the original system's overall door opening and closing commands as the opening and closing commands, but the DCU only uses enable commands and door opening commands to represent the door opening and closing actions as an example, the working principle of the sliding door interface conversion circuit will be explained:

[0051] pass Figure 4 It is known that after the replacement, when the DCU performs the door opening action, both the enable command and the door opening command need to be at a high level. When performing the door closing command, the enable command needs to be at a high level and the switch command needs to be at a low level. The voltage required for the enable command and the door opening command is provided by the DCU or the gate power module.

[0052] When the sliding door interface conversion circuit does not receive the full-side opening / closing command from the original system, neither the door opening relay nor the door closing relay will operate, the conversion circuit will have no output, and the sliding door will remain in the previous state.

[0053] When the sliding door interface conversion circuit does not receive the full-side opening command from the original system, the opening relay will activate and the closing relay will not activate. The power supply will send an opening command to the DCU through the normally open contact of the opening relay and the normally closed contact of the closing relay. The power supply will also send an enable command to the DCU through the normally open contact of the opening relay. After receiving the opening command and the enable command, the DCU will control the sliding door to open.

[0054] When the sliding door interface conversion circuit does not receive a full-side closing command from the original system, the closing relay activates while the opening relay does not. The closing relay and its normally closed contact disconnect the opening signal path. The power supply sends an enable command to the DCU through the normally open contact of the closing relay. Upon receiving the enable command, the DCU controls the sliding door to close. This invention effectively solves the communication, control compatibility, and door opening / closing synchronization problems that exist during the parallel operation of the two systems when replacing components in the platform screen door system. It ensures the consistency of the two systems' operation, thereby effectively reducing the impact on subway operations during the replacement process. Example

[0055] This embodiment provides a redundant control system for subway platform doors, including an integrated monitoring system, a data processing host, a PSC cabinet for the original system, a temporary control unit, and a temporary power supply unit. The integrated monitoring system is connected to the data processing host and is used to receive and display data from the platform door system. Station personnel and dispatchers can confirm the operating status of the platform doors through the integrated monitoring system. The temporary control unit is connected in parallel with the PSC cabinet to the data processing host, and each sliding door is connected to the temporary control unit and the PSC cabinet through a communication data line.

[0056] The original system's PSC cabinet is used to send control commands to the original system's sliding doors and receive feedback on the sliding door's operating status. After processing the relevant data, it sends it to the data processing host. The temporary control unit and PSC cabinet have the same logic control principle and operating voltage as the original system. The entire side door opening output command and operating voltage section is designed according to the control requirements of the replaced DCU, and is used to send control commands to the new system's sliding doors and receive feedback on the sliding door's operating status. The data processing host reads data from the original system's PSC cabinet and the new system's sliding doors respectively, and is used to merge and process the two data before sending them to the integrated monitoring system. The temporary power supply unit is connected to the temporary control unit and is used to provide the voltage required for the temporary control unit to operate normally.

[0057] The system of the present invention replaces the platform screen door system according to the method of Embodiment 1. During the replacement process, the system operates in a dual-system parallel mode. After the replacement is completed, the data processing host, temporary control unit and temporary power supply unit are cancelled, and the new system completes the overall control. The platform screen door also returns to the single-system operation mode.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-system operation method for a redundant control system for subway platform doors, characterized in that: Includes the following steps: Step 1: Analyze the communication method of the original platform door system DCU and determine whether the original communication method is the same as the replacement DCU. If they are the same, analyze the communication data. If the original communication method is different from the replacement DCU, or the communication data cannot be analyzed, or there are new functions, add a data processing host. Step 2: Connect the newly added data processing host to the replacement DCU and upload the data from the replacement DCU to the data processing host; for the DCU that has not been replaced, its data will still be processed by the original system and the processed data will be sent to the data processing host through the original interface connected to the integrated monitoring system. After merging and processing the data from the two systems, the data processing host sends the data to the integrated monitoring system. Step 3: Modify the judgment logic of the whole-side door opening and closing control command in the DCU program according to the original system's whole-side door opening and closing control method to achieve the universality of the interface; and combine the original system's whole-side door opening and closing command control method, modify the current limiting resistor value according to the original system's whole-side door opening and closing command voltage to achieve voltage universality. Step 4: Determine whether the PSC cabinet needs to be replaced or modified. When the DCU cannot be directly compatible with the control and the original control system PSC cabinet needs to be replaced, add a temporary control unit, a temporary power supply unit, and a DCU control cable for the platform door system. The temporary control unit has the same logic control principle and operating voltage as the original system. The door opening and closing output commands and operating voltage of the temporary control unit are matched according to the control requirements of the replaced DCU. The temporary power supply unit supplies power to the temporary control unit and transmits door opening and closing control commands to the replaced DCU through the DCU control cable. Step 5: Detect the opening and closing status of the sliding door in the original system, and determine whether the deviation of the sliding door action between the two systems meets the user's requirements. If the requirements cannot be met, modify and replace the DCU program and default parameters to keep the above status and the deviation of the sliding door in the original system within the range required by the user. Step Six: After completing the design optimization of the components through the above steps, begin the gradual replacement of the platform components in the platform door system. After the platform components are replaced, replace or modify the PSC cabinet to meet the sliding door control requirements. During the replacement process, a dual-system parallel mode is used. After all replacements are completed, remove the data processing host, temporary control unit, and temporary power supply unit, and restore the normal cable wiring. The new system will then be fully responsible for overall control, and the platform door system will return to normal single-system operation mode.

2. The dual-system operation method of the subway platform door redundant control system according to claim 1, characterized in that: The added data processing host has a single sliding door status shielding function.

3. The dual-system operation method of the subway platform door redundant control system according to claim 1, characterized in that: The DCU for detecting door opening and closing commands on both sides adopts a low operating voltage and multi-loop design, and the door opening and closing commands and safety loops can also achieve versatility through the addition of an interface conversion circuit for sliding doors.

4. The dual-system operation method of the redundant control system for subway platform doors according to claim 1, characterized in that: When replacing the DCU requires adding a safety loop breakpoint detection function, if the power supply voltage and control method of the safety loops of the two systems are the same, the safety loop status is fed back to the signal system through the original system PSC cabinet; if the power supply voltage or control method of the safety loops of the two systems are different, a new safety loop cable is added to form an independent safety loop with the newly replaced sliding door, and the replaced DCU performs safety loop breakpoint detection based on the sliding door status and the safety loop status.

5. The dual-system operation method of the redundant control system for subway platform doors according to claim 1, characterized in that: The system detects the opening and closing status of the sliding door in the original system. The status includes the process from when the sliding door receives the opening and closing command to when the gate lock is activated, the cessation of the sliding door opening action, the cessation of the sliding door closing action, and the flashing of the door status indicator light during the opening and closing process.

6. The dual-system operation method of the redundant control system for subway platform doors according to claim 1, characterized in that: The platform screen door system's temporary control unit is also equipped with a door opening / closing command delay circuit at its output terminal. By adjusting the circuit parameters, the time when the temporary control unit issues the door opening / closing command is delayed, thus maintaining the synchronicity of the sliding door's opening and closing actions.

7. A redundant control system for subway platform doors, comprising an integrated monitoring system, a data processing host, a primary system PSC cabinet, a temporary control unit, and a temporary power supply unit. The integrated monitoring system is connected to the data processing host, and the temporary control unit is connected in parallel to the data processing host with the PSC cabinet. Each sliding door is connected to the temporary control unit and the PSC cabinet via a communication data line. When replacing the platform door system, the dual-system operation method of the redundant control system for subway platform doors as described in any one of claims 1-6 is executed.

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