Shielding door intelligent blocking and preventing clamping device applicable to unmanned subway

Abstract

The application provides a kind of shielding door intelligent blocking and preventing clamping device applicable to unmanned subway, comprising a unit controller terminal arranged on a platform, a local control box, a plurality of transmission telescopic systems and a plurality of blocking detection systems; the unit controller terminal is connected with the local control box and is in communication connection with a train automatic control system; the local control box is connected with a door machine controller; the door machine controller is connected with the transmission telescopic system and the blocking detection system; the blocking detection system comprises a blocking strip and a detection system installed on the blocking strip; the blocking strip is drivingly connected with the corresponding transmission telescopic system and is connected with a side adjacent to a train of a shielding door frame of the platform through the transmission telescopic system. The shielding door intelligent blocking and preventing clamping device applicable to unmanned subway of the application overcomes the low detection accuracy and the deficiency of the preventing clamping ability of the existing subway shielding door foreign matter detection and preventing clamping device, reduces the passenger danger caused by human error operation, and is applicable to unmanned subway line.

Description

Technical Field

[0001] This invention relates to the field of anti-pinch devices for subway platform screen doors, and more particularly to an intelligent anti-pinch device for platform screen doors applicable to driverless subways. Background Technology

[0002] As a safety device in urban rail transit systems, subway platform screen doors not only create a safe and comfortable waiting environment for passengers but also offer advantages such as energy saving, environmental protection, and increased waiting area capacity. However, platform screen doors also harbor risks that cannot be ignored. Due to the limitations of the subway train's envelope and equipment clearance, passengers may become trapped in the platform gap between the screen doors and the train. Such accidents involving trapped passengers occur occasionally throughout the country, delaying train operations and potentially causing serious injury to passengers. In recent years, fully automated driving and system control in rail transit have been developing rapidly, and driverless subways and fully automated lines are becoming the general trend. The problems of subway congestion and over-saturation transportation are becoming increasingly serious. Especially during morning and evening rush hours, the maximum load rate of some sections of many lines exceeds 120%, which increases the incidence of accidents in the platform gap.

[0003] Currently, mainstream anti-pinch devices are mainly divided into two categories: physical anti-pinch detection and optical detection. Physical anti-pinch detection mainly includes anti-pinch baffles installed on platform screen doors and anti-standing ramps installed on platforms. Anti-pinch baffles, installed on platform screen doors, increase the cross-section of the door, making the contact area with the human body larger. When the door closes, if it comes into contact with a person, the resistance from the person is transmitted through this baffle, making the anti-pinch device more sensitive. Anti-standing ramps are designed to prevent people from standing in the gaps. Optical anti-pinch detection mainly includes three types of facilities: infrared light curtains, laser light curtains, and manual observation light strips. Infrared light curtain detection technology uses an infrared beam emitted from the transmitter to scan the platform gaps. If the receiver shows a certain degree of obstruction of the infrared beam, it determines that there is a foreign object or person in the platform gap. Laser light curtain detection systems similarly use multiple sets of laser emitting and receiving devices to scan the platform gaps. The manual lookout light strip is a vertical light tube installed on the platform, usually at the end of the platform. The driver relies on the integrity of the lookout light strip to determine whether there are foreign objects or people intruding between the platform screen doors and the train doors.

[0004] The existing technology has the following problems:

[0005] Because the train doors and platform screen doors are not a linked system, and both have anti-pinch functions, if the platform screen doors are closed but the train doors are not, passengers may be pushed out of the gap between the train and the platform. If the train doors are closed but the platform screen doors are not, passengers may be unable to retreat to the platform after failing to board and may remain in the gap between the platforms. When the platform screen doors reopen, the safety barriers originally designed to increase the contact area are very likely to push people out of the sliding door area, and the anti-slip ramps may cause people to lose their balance, increasing the possibility of falling onto the platform.

[0006] Infrared light curtain detection technology is limited by its detection distance and requires multiple sets of equipment for joint detection due to the need for multi-segment detection. This technology is susceptible to interference from dust, insects, train vibration, and the refraction and reflection of complex light, leading to false detections. Laser light curtain detection technology is difficult to maintain and calibrate, requiring a huge workload. Multiple sets of equipment are needed to meet the detection needs of a single subway train, and it is also susceptible to diffuse reflection, dust, train vibration, and wind pressure, resulting in false and missed detections and low accuracy. Manual observation light strips have large blind spots and are unreliable. Furthermore, due to the driver's visual judgment process, they are susceptible to natural stray light and driver fatigue, making them unsuitable for driverless environments. Summary of the Invention

[0007] To address the shortcomings of the existing technology, this invention provides an intelligent anti-pinch device for platform screen doors applicable to driverless subways. It overcomes the low detection accuracy and insufficient anti-pinch capability of existing foreign object detection and anti-pinch devices for subway platform screen doors, while simultaneously reducing passenger accidents caused by human error. It is suitable for driverless subway lines.

[0008] To achieve the above objectives, the present invention provides an intelligent anti-pinch device for platform screen doors applicable to driverless subways, comprising a unit controller terminal, a local control box, several transmission and telescopic systems, and several blocking detection systems installed on the platform; the unit controller terminal is connected to the local control box and communicates with a train automatic control system; the local control box is connected to a door operator controller; the door operator controller is connected to the transmission and telescopic systems and the blocking detection systems; the blocking detection system includes a blocking bar and a detection system installed on the blocking bar; the blocking bar is drivenly connected to the corresponding transmission and telescopic system and connected to the side of a platform screen door frame adjacent to the train via the transmission and telescopic system.

[0009] Preferably, the transmission telescopic system includes a worm gear motor, two couplings, two connecting rods, and two rotary connectors; the worm gear motor is fixed to a loading platform, which is embedded and fixed to the side of the platform screen door frame adjacent to the train; two motor shafts extend from both ends of the worm gear motor, and the motor shafts are respectively connected to the first end of the connecting rod through one of the couplings, and the second end of the connecting rod is connected to the barrier bar through the rotary connectors; the detection system includes a bar-shaped micro switch, which is installed on the barrier bar.

[0010] Preferably, the loading platform has a display device on the side away from the train.

[0011] Preferably, the display device is a lightbox or a screen.

[0012] Preferably, the obstruction detection system is always in the active state; when the train door and the platform screen door are closed, if an object obstructs the closing of the platform screen door or the train door, the unit controller terminal determines from the information obtained from the train automatic control system and the door operator controller that the door being obstructed from closing is the platform screen door, the train door, or both.

[0013] When it is determined that an object is obstructing the closing of the platform screen door and the obstruction detection system has not met the triggering conditions, it is considered that no person or object has entered the platform gap, and the normal secondary opening of the platform screen door is not interfered with. The door will be closed again after the object is removed.

[0014] When it is determined that the trapped object only obstructs the train door, the automatic train control system prohibits the train from starting. The unit controller terminal transmits a signal to the door operator controller. After confirming that the local control box is in the automatic position, the door operator controller instructs the transmission telescopic system to push the obstruction detection system to a designated position and lock it on the train's envelope. If the obstruction detection system touches an obstacle during operation, the obstruction detection system is triggered and transmits a trigger signal to the door operator controller. The door operator controller instructs the obstruction detection system to lock at the current position. After the obstruction bar completely stops locking, it feeds back the locking information to the door operator controller. After being processed and transmitted by the unit controller terminal, the automatic train control system instructs the train door to open a second time and simultaneously sends an alarm to the platform staff's handheld terminal. After the object is removed, the train door closes and locks again. The automatic train control system informs the unit controller terminal of the train door locking information. The unit controller terminal then notifies the door operator controller to instruct the transmission telescopic system to reset the obstruction detection system after the train door is normally locked. After that, the automatic train control system releases the train.

[0015] When both the platform screen door and the train door are locked, but an object or person intrudes into the platform gap, the person will come into contact with the blocking detection system on the platform screen door, triggering the bar microswitch. This causes the blocking detection system to report the abnormality to the door operator controller and the unit controller terminal level by level. After receiving the abnormality signal, the door operator controller unlocks the platform screen door and forces the local control box into reset mode. After receiving the signal, the unit controller terminal notifies the train automatic control system to prohibit train start and sends this information to the handheld terminal of the platform staff as an alarm. (The text abruptly ends here, likely due to an incomplete sentence or missing information.) After the person or object leaves the platform gap, the gantry crane controller confirms that the bar microswitch of the obstruction detection system is no longer triggered. After manual confirmation by the station staff, the local control box is switched from reset to automatic position using a key. After the local control box is switched to automatic position, it notifies the gantry crane controller to instruct the transmission telescopic system to reset the obstruction detection system. After the obstruction detection system is reset, the platform screen door closes and locks again. The gantry crane controller informs the unit controller terminal of the platform screen door locking information level by level. Then, the unit controller terminal notifies the train automatic control system to release the train.

[0016] Because the present invention adopts the above technical solution, it has the following beneficial effects:

[0017] This device can accurately detect whether there are foreign objects in the platform gap that may affect train passage, and it can also safely protect passengers inside the train from entering the gap when doors open or close abnormally. At the same time, this device can reduce passenger accidents caused by human error and is suitable for unmanned subway lines.

[0018] This invention is based on the mechanical plane of the platform screen door, and uses a transmission telescopic system to control the movement of the blocking detection system. It can partially fill the gap between the platform and the train to prevent passengers from entering the gap when the train door is abnormal. It also uses a touch detection sensor (such as a bar switch) to detect whether there is an object or human body in the gap between the platform and the train.

[0019] The mechanical plane of the wall-mounted platform screen door of this invention can be equipped with a screen and advertising space.

[0020] The transmission telescopic system of the present invention can be stopped by a detection sensor or its extension distance can be limited by the maximum stroke.

[0021] In the control strategy of this invention, if both the train door and the platform screen door are locked but the obstruction detection system detects foreign objects in the platform gap, the local control box controlling a single platform screen door will not be able to be switched to the isolation position using a key. It can only be switched between manual open, manual close, automatic position, and reset position. This prevents the platform screen door from being isolated from the overall signal in the case of unmanned train operation, and the platform and train signal center from missing the abnormal door position, resulting in the normal release of the train. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the system structure of an intelligent anti-pinch device for platform screen doors applicable to driverless subways, according to an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the platform side of the intelligent anti-pinch device for platform screen doors applicable to driverless subways, according to an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the train side of an intelligent anti-pinch device for platform screen doors applicable to driverless subways, according to an embodiment of the present invention.

[0025] Figure 4 This is a cross-sectional view of the platform when the barrier detection system of this invention is fully deployed;

[0026] Figure 5 for Figure 4 Enlarged view of region A in the middle;

[0027] Figure 6 This is a cross-sectional view of the platform when the barrier detection system of this invention is fully retracted;

[0028] Figure 7 for Figure 6 Enlarged view of region B in the middle;

[0029] Figure 8 This is a system flowchart of an intelligent anti-pinch device for platform screen doors applicable to driverless subways, according to an embodiment of the present invention. Detailed Implementation

[0030] The following is based on the attached diagram. Figures 1 to 8 The present invention provides preferred embodiments and describes them in detail to enable a better understanding of the functions and features of the present invention.

[0031] Please see Figures 1 to 8 An embodiment of the present invention provides an intelligent anti-pinch device for platform screen doors applicable to driverless subways, comprising a unit controller terminal 21, a local control box 22, several transmission telescopic systems 24, and several blocking detection systems 25 installed on the platform; the unit controller terminal 21 is connected to the local control box 22 and communicates with a train automatic control system 19; the local control box 22 is connected to a door operator controller 23; the door operator controller 23 is connected to the transmission telescopic systems 24 and the blocking detection systems 25; the blocking detection system 25 includes a blocking bar 15 and a detection system installed on the blocking bar 15; the blocking bar 15 is connected to the corresponding transmission telescopic system 24 and connected to the side of a platform screen door frame 2 adjacent to the train via the transmission telescopic system 24.

[0032] The transmission telescopic system 24 includes a worm motor 5, two couplings 12, two connecting rods 13, and two rotary connectors 14; the worm motor 5 is fixed to a loading platform 4, which is embedded and fixed to the side of the platform screen door frame 2 adjacent to the train; two motor shafts 11 extend from both ends of the worm motor 5, and the motor shafts 11 are respectively connected to the first end of the connecting rod 13 through a coupling 12, and the second end of the connecting rod 13 is connected to the barrier bar 15 through the rotary connectors 14; the detection system includes a bar micro switch 16, which is installed on the barrier bar 15.

[0033] The loading platform 4 has a display device 20 on the side away from the train.

[0034] The display device 20 uses a lightbox or a screen.

[0035] In this embodiment, the platform structure also includes a platform screen door beam 1, a platform screen door frame 2, a platform screen door post 17, and a fixed door 18 installed on the platform screen door beam 1; below the platform screen door is a foundation and a bottom track 3. The inner side of the platform is a tunnel foundation 10, on which a track 9 is installed; the train body 6 is mounted on the track 9 via train wheels 8.

[0036] The obstruction detection system 25 is always in the active state; when the train door 7 and the platform screen door are closed, if an object obstructs the closing of the platform screen door or the train door 7, the unit controller terminal 21 determines from the information obtained from the train automatic control system 19 and the door operator controller 23 that the door being obstructed from closing is the platform screen door, the train door 7, or both.

[0037] When it is determined that an object is obstructing the closing of the platform screen door and the obstruction detection system 25 has not met the triggering conditions, it is considered that no person or object has entered the gap between the platforms, and the normal secondary opening of the platform screen door is not interfered with. The door will be closed again after the object is removed.

[0038] When it is determined that the trapped object only obstructs train door 7, the train automatic control system 19 prohibits train start-up. The unit controller terminal 21 transmits a signal to the door operator controller 23. After confirming that the local control box 22 is in the automatic position, the door operator controller 23 instructs the transmission telescopic system 24 to push the obstruction detection system 25 to the designated position in the direction of the train and lock it on the train's envelope. If the obstruction detection system 25 touches an obstacle during operation, the obstruction detection system 25 is triggered and transmits a trigger signal to the door operator controller 23. The door operator controller 23 instructs the obstruction detection system 25 to lock in the current position to prevent injury to the human body caused by secondary compression, and also to prevent the human body from entering the platform gap. After the barrier completely stops and locks, the locking information is fed back to the door operator controller 23. After being processed and transmitted by the unit controller terminal 21, the train automatic control system 19 instructs the train door 7 to open again. At the same time, an alarm is sent to the handheld terminal of the platform staff. After the object is removed, the train door 7 closes and locks again. The train automatic control system 19 informs the unit controller terminal 21 of the locking information of the train door 7. The unit controller terminal 21 then notifies the door operator controller 23 to instruct the transmission telescopic system 24 to reset the blocking detection system 25 after the train door 7 is normally locked. After that, the train automatic control system 19 releases the train, and the train can start. This serves to prevent people from being squeezed into the gap between the train and the platform.

[0039] When both the platform screen door and train door 7 are locked, but an object or person intrudes into the platform gap, the person will come into contact with the obstruction detection system 25 on the platform screen door, triggering the bar micro switch 16. This causes the obstruction detection system 25 to report the abnormality to the door operator controller 23 and the unit controller terminal 21 level by level. After receiving the abnormality signal, the door operator controller 23 unlocks the platform screen door and forces the local control box 22 into reset mode. After receiving the signal, the unit controller terminal 21 notifies the train automatic control system 19 to prohibit the train from starting and sends this information to the handheld terminal of the platform staff to issue an alarm, ensuring the safety of people and train operation. After a person or object leaves the platform gap, the gantry crane controller 23 confirms that the bar microswitch 16 of the obstruction detection system 25 is no longer triggered. After manual confirmation by the station staff, the local control box 22 is switched from the reset position to the automatic position using a key. After the local control box 22 is switched to the automatic position, it notifies the gantry crane controller 23 to instruct the transmission telescopic system 24 to reset the obstruction detection system 25. After the obstruction detection system 25 is reset, the platform screen door closes and locks again. The gantry crane controller 23 informs the unit controller terminal 21 of the platform screen door locking information level by level. Then the unit controller terminal 21 notifies the train automatic control system 19 to release the train, and the train can start.

[0040] In this embodiment, the unit controller terminal 21 controls and monitors the operation of the entire subway platform screen door protection detection system, enabling the exchange and aggregation of information within the system to facilitate information exchange with other collaborative systems. It can query the status of each sub-control unit and, when corresponding abnormalities occur, control the local controller to direct the system operation according to set conditions, monitoring the system operation and receiving feedback. It can also store relevant operational data and possesses monitoring and diagnostic functions.

[0041] The local control box 22 (LCB) can switch the control status of a single door. It can switch the control level and mode of a single door via a key switch. When the system cannot be automatically reset or troubleshooted, the local control box 22 can switch to manual control to isolate this door system for manual handling, ensuring the operation of other systems. It incorporates a newly designed control strategy to prevent operator error from causing incorrect isolation of the unit and resulting in signal system chaos. Common LCBs have four key positions: automatic, manual open, manual close, and isolation. The automatic position allows the door control unit (DCU) to receive commands from the central control panel; the isolation position isolates the entire platform screen door unit from the system, cutting off the unit's power supply for maintenance, and in this case, the unit's safety circuit is bypassed; the manual open and manual close positions execute manual opening and closing commands instead of central control panel commands, and in this case, the unit's safety circuit is bypassed. This system's LCB design adds a "reset" key position. In this system's strategy, when a person is trapped or an obstruction is detected by the platform screen door unit, the safety circuit is disconnected when switching from the automatic to the manual open position. Conversely, when switching from the manual close position to the automatic position, the system must first switch to the reset position to reconnect the safety circuit before switching to the automatic position, preventing station staff from mistakenly blocking signals. If manual operation is necessary, the emergency stop button on the platform must be pressed before switching to the "manual key position" if the system has not been reset.

[0042] The transmission telescopic system 24 is responsible for the operation of the barrier bar. Under set conditions, it can use the right-angle worm gear reducer motor installed inside the platform screen door frame to drive the crank to push the barrier bar closer to the train, and lock the position of the barrier bar 15 when the barrier detection system 25 touches an object or person.

[0043] The barrier detection system 25 consists of barrier bars and a detection system. The barrier bars are normally embedded within the platform screen door frame. Under certain conditions, they are extended via a transmission telescopic system 24 to prevent passengers from entering the platform gap. The detection system is installed on the barrier bars and uses a highly sensitive and simply designed strip switch (safety contact edge) for touch detection. It can detect larger foreign objects and people in the platform gap, as well as the maximum transmission distance of the barrier bars.

[0044] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A smart anti-pinch device for platform screen doors applicable to driverless subways, characterized in that, The system includes a unit controller terminal (21), a local control box (22), several transmission telescopic systems (24), and several blocking detection systems (25) installed on the platform. The unit controller terminal (21) is connected to the local control box (22) and communicates with a train automatic control system (19). The local control box (22) is connected to a gantry controller (23). The gantry controller (23) is connected to the transmission telescopic system (24) and the blocking detection system (25). The blocking detection system (25) includes a blocking bar (15) and a detection system installed on the blocking bar (15). The blocking bar (15) is connected to the corresponding transmission telescopic system (24) and connected to the side of a platform screen door frame (2) adjacent to the train through the transmission telescopic system (24). When it is determined that the trapped object only obstructs the train door (7), the train automatic control system (19) prohibits the train from starting. The unit controller terminal (21) transmits a signal to the door operator controller (23). After confirming that the local control box (22) is in the automatic position, the door operator controller (23) instructs the transmission telescopic system (24) to push the obstruction detection system (25) to the designated position and lock it on the train's envelope. If the obstruction detection system (25) touches an obstacle during operation, the obstruction detection system (25) is triggered and transmits a trigger signal to the door operator controller (23). The door operator controller (23) instructs the obstruction detection system (25) to lock in the current position. After the door is completely locked, the locking information is fed back to the door operator controller (23). After being processed and transmitted by the unit controller terminal (21), the train automatic control system (19) instructs the train door (7) to open for the second time. At the same time, an alarm is sent to the handheld terminal of the platform staff. After the object is removed, the train door (7) closes and locks again. The train automatic control system (19) informs the unit controller terminal (21) of the information that the train door (7) is locked. The unit controller terminal (21) then notifies the door operator controller (23) to instruct the transmission telescopic system (24) to reset the obstruction detection system (25) after the train door (7) is normally locked. After that, the train automatic control system (19) releases the train.

2. The intelligent anti-pinch device for platform screen doors applicable to driverless subways according to claim 1, characterized in that, The transmission telescopic system (24) includes a worm motor (5), two couplings (12), two connecting rods (13), and two rotary connectors (14); the worm motor (5) is fixed to a loading platform (4), which is embedded and fixed to the side of the platform frame (2) adjacent to the train; two motor shafts (11) extend from both ends of the worm motor (5), and the motor shafts (11) are respectively connected to the first end of the connecting rod (13) through a coupling (12), and the second end of the connecting rod (13) is connected to the barrier bar (15) through the rotary connectors (14); the detection system includes a bar micro switch (16), which is installed on the barrier bar (15).

3. The intelligent anti-pinch device for platform screen doors applicable to driverless subways according to claim 2, characterized in that, The loading platform (4) has a display device (20) on the side away from the train.

4. The intelligent anti-pinch device for platform screen doors applicable to driverless subways according to claim 3, characterized in that, The display device (20) is a lightbox or a screen.

5. The intelligent anti-pinch device for platform screen doors of driverless subways according to any one of claims 2 to 4, characterized in that, The obstruction detection system (25) is always in the active state; when the train door (7) and the platform door are closed, if an object blocks the closing of the platform door or the train door (7), the unit controller terminal (21) determines from the information obtained from the train automatic control system (19) and the door machine controller (23) that the door blocked by the object is the platform door, the train door (7) or both have been blocked; When it is determined that an object is obstructing the closing of the platform screen door and the obstruction detection system (25) has not reached the trigger condition, it is regarded as no person or object has been reported to have entered the platform gap, and the normal secondary opening of the platform screen door is not interfered with. The door will be closed again after the object is removed. When both the platform screen door and the train door (7) are locked, but an object or person intrudes into the platform gap, the person will come into contact with the blocking detection system (25) on the platform screen door, triggering the bar micro switch (16). This causes the blocking detection system (25) to report the abnormal situation to the door operator controller (23) and the unit controller terminal (21) level by level. After receiving the signal of the abnormal situation, the door operator controller (23) unlocks the platform screen door and forces the local control box (22) to enter the reset mode. After receiving the signal, the unit controller terminal (21) notifies the train automatic control system (19) to prohibit the train from starting and sends this information to the handheld terminal of the platform staff for alarm. After the person or object trapped leaves the platform gap, the door operator controller (23) confirms that the bar micro switch (16) of the blocking detection system (25) is no longer triggered. After manual confirmation by the station staff, the local control box (22) is switched from reset to automatic position using a key; after the local control box (22) is switched to automatic position, it notifies the door operator controller (23) to command the transmission telescopic system (24) to reset the obstruction detection system (25); after the obstruction detection system (25) is reset, the platform screen door is closed and locked again; the door operator controller (23) informs the unit controller terminal (21) of the information of the platform screen door being locked level by level; then the unit controller terminal (21) notifies the train automatic control system (19) to release the train.

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