Platform door resistance-encountering control method

Abstract

The invention provides a platform door resistance encountering control method, which relates to the technical field of platform safety and comprises the following steps of S1, acquiring a real-time stroke of a platform door when the platform door descends; s2, judging whether descending of the platform door is blocked or not, if yes, stopping descending, recording the blocked position and executing S3; otherwise, the operation is not executed; s3, after the platform door ascends, the platform door descends again; s4, judging whether the real-time position of the platform door is lower than the blocked position or not, and if yes, normally closing the platform door; otherwise, the platform door stops descending again, and S5 is executed; and S5, the platform door continues to move downwards to the lower limit. Resistance meeting control is carried out at the pull rope, when the platform door is closed, descending is stopped once descending of the pull rope meets resistance so that passengers can evacuate, descending is stopped again when secondary resistance meeting is carried out so that workers can clear a site and finally close the door, the risk in the platform door closing and pressing process is effectively avoided, the intelligent degree is high, manpower and material resource consumption is effectively reduced, and the working efficiency is improved. And the train departure safety is ensured.

Description

Technical Field

[0001] This invention relates to the field of platform safety technology, and in particular, to a method for controlling obstruction of platform screen doors. Background Technology

[0002] With urban development, the demand for rail vehicles to serve transportation functions between urban areas and suburbs is increasing. As different regions develop in diverse ways, the actual needs for rail vehicles vary greatly, including urban subways (including underground railways and surface light rail), and trains between cities (including bullet trains, high-speed trains, and regular trains), etc., all of which are collectively referred to as rail transit vehicles.

[0003] These rail transit platforms experience high passenger flow and operate at high speeds, necessitating the installation of platform screen doors to separate platform personnel from the rail vehicles and prevent accidental falls. Furthermore, to accommodate varying passenger volumes, trains are typically designed with different formations, such as two-car or three-car trains. To accommodate different train formations and meet the boarding and alighting needs of different platforms, a single line may have multiple platforms with different formations. This means that the opening positions of the train doors may differ, potentially causing a mismatch between the platform screen doors and the train doors, resulting in significant inconvenience for passengers boarding and alighting.

[0004] Therefore, conventional subway swing doors (sliding doors) cannot achieve the goal of "one platform screen door area corresponding to multiple types of trains". Now, there are platform screen doors with a large opening formed by setting a long pull rope between two gate posts. In this way, the width of the gate post accounts for a small proportion of the total width of the platform screen door. The opening position of each type of train can also be controlled by the length of the pull rope. For example, Chinese invention patent CN116517427A provides a smart platform screen door structure for rail transit, which relates to the field of rail transit technology. It includes fixed columns and movable columns. The fixed columns are provided with telescopic grooves, and limit sliding columns are provided in the telescopic grooves. The movable columns include a main plate, a lead screw and a slider. The upper part of the main plate is provided with a rotating roller and a conveyor belt. The lead screw is provided with a first connector and a second connector. The end of the conveyor belt away from the first connector is connected to the slider. The slider is provided with a hook. There are at least two fixed columns and movable columns, so that the movable columns on the two fixed columns are connected by a pull rope whose end is fixed to the hook. The invention is simple to set up. It uses a pull-rope platform screen door to extend the distance between the screen door columns. One screen door area can correspond to the doors of multiple types of trains, which is suitable for different trains with different door opening positions. It is convenient for passengers to get on and off. Moreover, the two-stage lifting structure of the pull rope is stable. When the pull rope is lowered, it can effectively prevent people from falling off the platform, which is highly safe.

[0005] However, the aforementioned platform screen door structure still has the following drawbacks: The entire platform is very long. In the past, without platform screen doors, the entire platform was unobstructed, and even a small number of staff could clearly see whether all passengers were standing inside the yellow line. However, after installing multiple platform screen door pillars, the pull rope descends when the platform screen doors close. If passengers or luggage are left below the platform screen doors, it is easy for pedestrians or luggage to fall to the edge of the platform when the doors close, causing danger. A small number of staff cannot detect and eliminate the risk in time, so safety management can only be carried out by setting up at least one staff member at each platform screen door, which consumes a lot of manpower and resources. Although the existing pull rope safety doors have flexible ropes, there is still a risk of injury caused by downward pressure. The existing pull rope doors do not have a control method for pedestrians or luggage obstructing the way when the doors close, and there is still a safety hazard when the train leaves the station.

[0006] Therefore, in order to solve the above problems, it is necessary for us to design a platform door obstruction control method. Summary of the Invention

[0007] The purpose of this invention is to provide a platform door obstruction control method. Obstruction control is performed at the pull rope. When the platform door is closing, if the pull rope encounters obstruction while descending, it stops descending and rises a certain distance to facilitate passenger evacuation. If it encounters obstruction a second time, it stops descending again to facilitate staff clearing the area before finally closing the door. This effectively avoids the risks during the platform door closing and downward pressure process, has a high degree of intelligence, effectively reduces the consumption of manpower and material resources, and ensures the safety of trains leaving the station.

[0008] To achieve the above objectives, the present invention employs the following technical solution: A method for controlling obstruction at platform screen doors includes the following steps: S1: When the platform door downlink signal is received, obtain the real-time travel position of the platform door; S2: Determine if the platform screen door encounters an obstruction while descending. If so, the platform screen door stops descending, a Level 1 alarm is issued, the current travel position of the platform screen door is recorded as the obstruction position, and step S3 is executed; otherwise, no operation is executed. S3: After the platform door rises to the preset height, the platform door descends again; S4: After the first preset time, determine whether the real-time travel position of the platform door is lower than the obstruction position. If so, the platform door will descend normally until the lower limit. Otherwise, the platform door will stop descending again, issue a level 2 alarm, and execute step S5. S5: After receiving the platform door downlink signal again, the platform door continues to descend until it reaches the lower limit.

[0009] As a preferred embodiment of the present invention, the platform gate includes a plurality of columns disposed on the platform and a platform gate formed by a liftable pull rope disposed between two adjacent columns; the columns are provided with a slider for connecting to the pull rope and a drive motor for driving the slider to slide, and the drive motor is provided with an electronic travel recorder. When executing step S1, upon receiving the downlink signal of the platform door, the position of the slider is obtained in real time through the electronic travel recorder, which serves as the real-time travel position of the platform door.

[0010] As a preferred embodiment of the present invention, when performing step S2, it is determined whether either slider at one end of the pull rope is obstructed. If so, the platform door stops descending, a first-level alarm is issued, the current travel position of the side of the platform door closest to the obstructed slider is recorded as the obstruction position, and step S3 is executed; otherwise, no operation is performed.

[0011] As a preferred embodiment of the present invention, when performing step S4, after a first preset time, it is determined whether the real-time position of all platform doors on the obstructed side is lower than their obstructed position. If so, the platform doors descend normally until the lower limit position; otherwise, the platform doors stop descending again, a secondary alarm is issued, and step S5 is executed.

[0012] As a preferred embodiment of the present invention, step S5 specifically includes: S51: Determine whether the platform door downlink signal has been received again. If yes, proceed to step S52; otherwise, do not perform the operation. S52: After the platform door rises to the preset height, the power of the drive motor is increased, causing the platform door to descend with increased force until it reaches the lower limit.

[0013] As a preferred embodiment of the present invention, step S3 specifically includes: S31: The platform door rises to a preset height; S32: Determine whether the pull rope is subjected to a tension greater than the second preset tension value. If so, the platform door stops operating; otherwise, proceed to step S33. S33: After waiting for the second preset time, the platform door will descend again.

[0014] As a preferred embodiment of the present invention, a tension sensing element is provided at the connection between the end of the pull rope and the slider; When executing step S32, it is determined whether either of the tension sensing elements at both ends is subjected to a tension greater than the second preset tension value. If so, the platform door stops running and issues a level three alarm; otherwise, step S33 is executed.

[0015] As a preferred embodiment of the present invention, an alarm is provided on the column; When performing step S2, if a level one alarm is issued, an audible and visual alarm will be triggered by the alarm device. When performing step S4, if a level two alarm is issued, an alarm will be sent to the surrounding staff via the alarm device. When executing step S32, if a level 3 alarm is issued, an alarm is sent to the platform control room via the alarm device.

[0016] As a preferred embodiment of the present invention, a preset height value is generated before performing step S3.

[0017] As a preferred embodiment of the present invention, the number of pull ropes is at least three; When performing step S2, determine whether any pull rope is obstructed. If so, the platform door stops descending, issue a level one alarm, record the current position of the slider at the bottom end of the pull rope as the obstruction position, and proceed to step S3; otherwise, do not perform the operation.

[0018] The beneficial effects of the obstruction control method for platform doors of the present invention are as follows: obstruction control is performed at the pull rope. When the platform door is closing, if the pull rope encounters obstruction while descending, it stops descending and rises a certain distance to facilitate passenger evacuation. If it encounters obstruction a second time, it stops descending again to facilitate staff clearing the area before finally closing the door. This effectively avoids the risks during the downward pressure process of the platform door closing. It has a high degree of intelligence, effectively reduces the consumption of manpower and material resources, and ensures the safety of trains leaving the station. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a platform door obstruction control method according to the present invention. Detailed Implementation

[0020] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0021] In the following description, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The following description provides multiple embodiments of this application, which can be substituted or combined with each other. Therefore, this application can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then this application should also be considered to include embodiments containing one or more other possible combinations of A, B, C, and D, even if such embodiments are not explicitly described in the following text.

[0022] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the described elements without departing from the scope of this application. Various processes or components may be appropriately omitted, substituted, or added to the examples. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined into other examples.

[0023] Example 1: As Figure 1 As shown, Figure 1 This is a schematic diagram of a platform screen door obstruction control method according to the present invention, and is only one embodiment of the present invention. The platform screen door is first explained as follows: the platform screen door is installed on a platform, primarily a high-speed rail platform (this explanation will also use a high-speed rail platform as an example, but it does not exclude the possibility of a subway platform, a regular train platform, or even a bus platform). When a train (or vehicle, hereinafter referred to as a train) enters the station, passengers waiting on the platform may be at risk of falling onto the platform and being run over by the train or squeezed into the gap between the train and the platform. Therefore, a platform screen door is installed on the platform. After the train comes to a complete stop, the platform screen door opens, allowing passengers to board and alight. After boarding and alighting are completed, the platform screen door closes, allowing the train to depart again. This effectively protects passengers behind the platform screen door when the train enters or leaves the station, significantly reducing the risk of falling onto the platform.

[0024] Structurally, the platform screen door includes several columns installed on the platform and a safety door formed by a liftable rope installed between two adjacent columns. Of course, two columns and the rope between the two columns form a safety door body, and multiple safety door bodies together constitute a complete platform screen door. For example, 31 columns are used to form 30 safety door bodies to protect the entire 500-meter platform. The width of each safety door body is about 16 meters, which means the length of the rope is about 16 meters.

[0025] Of course, there should be at least two guy ropes between the two pillars. The distance between any two guy ropes should not be greater than the emergency passage distance for a person to pass without touching the obstacle (generally around 30cm). The distance between the bottom guy rope and the platform ground should not be greater than the distance between any two guy ropes. For example, there are 6 guy ropes between the two pillars. The bottom guy rope is about 20cm from the ground to prevent suitcases or basketballs from falling off the platform. The distance between any two of the top guy ropes is about 30cm, so that the height of the top guy rope from the ground is 170cm, which can effectively prevent pedestrians from crossing directly (we assume that ordinary passengers are not high jumpers and cannot climb over without touching the guy ropes).

[0026] Platform screen doors are positioned at a certain distance from the platform edge. This distance is designed to protect personnel behind the pull ropes in case of train overload, preventing collisions between people and trains. It also aims to prevent people's arms from passing through gaps in adjacent pull ropes and colliding with the train when it enters or leaves the station. The space between the platform screen door and the platform edge is both a redundant space and an intrusion zone. Intrusion into this zone is prohibited except when the train has come to a complete stop. The pull ropes in the platform screen door are in a lowered state. After the train enters the station and comes to a complete stop, the pull ropes rise until the lowest pull rope is at least 2 meters above the platform ground, allowing pedestrians to pass under the pull ropes to board and alight from the train. After pedestrians have boarded or alighted, the pull ropes lower again to block pedestrians before the train departs the station. This application addresses the control of obstruction of platform screen doors. Besides structural abnormalities in the platform screen door itself, obstruction mainly occurs when passengers or luggage (collectively referred to as obstacles) block the direction of the platform screen door's movement, particularly in scenarios where obstacles are located below the platform screen door, causing obstruction during its descent.

[0027] Includes the following steps: S1: When the platform door downlink signal is received, obtain the real-time travel position of the platform door; Here, the first step is to confirm the status of the platform screen doors. Due to the high safety requirements of platform screen doors, pedestrian safety must be ensured at all times. Therefore, there is no situation where the platform screen doors are half-open. Platform screen doors only have four states: opening, closing, closed, and open. When the platform screen doors are in the closed or open state, the platform screen doors do not move up or down, so there is no obstacle encounter. When the platform screen doors are in the opening state, considering that even when the platform screen doors are closed, the top pull rope is more than one meter, close to two meters, and it is difficult to insert an obstacle between the two pull ropes (except in special circumstances), so it is difficult to encounter an obstacle. Therefore, only when the platform screen doors are in the closing state, i.e., preparing to descend, and an obstacle is below the platform screen doors, can an obstacle encounter be detected and thus obstacle encounter control be implemented. Therefore, the obstruction control method is activated only when the platform door is descending. In this application, it is triggered directly based on the platform door's descending signal, and the triggering method is to obtain the real-time travel position of the platform door.

[0028] In this invention, the column is provided with a slider for connecting to the pull rope and a drive motor for driving the slider to slide. The drive motor is equipped with an electronic travel recorder. The electronic travel recorder generally uses an absolute encoder, which can not only limit the upper and lower positions of the platform door, but also measure the current position of the platform door in real time. The travel position of the platform door is actually the position of the bottom pull rope. For example, if the lower limit position of the bottom pull rope of the platform door is set to 0 and the upper limit position of the bottom pull rope is set to 100, then the position of the platform door can only change between 0 and 100. When the platform door moves downward, the travel position gradually decreases, and the current position of the platform door (the bottom pull rope) can be output in real time, such as 83. When executing step S1, upon receiving the downlink signal of the platform door, the position of the slider is obtained in real time through the electronic travel recorder, which serves as the real-time travel position of the platform door.

[0029] S2: Determine if the platform screen door encounters an obstruction while descending. If so, the platform screen door stops descending, a Level 1 alarm is issued, the current travel position of the platform screen door is recorded as the obstruction position, and step S3 is executed; otherwise, no operation is executed. During the descent of the platform screen door, if the rope encounters an obstacle, that is, if the platform screen door is obstructed, then the platform screen door needs to stop descending to avoid squeezing pedestrians or luggage, and to prevent people from falling to the outside of the platform or luggage from falling to the outside of the platform and encroaching on the train tracks, which would cause danger.

[0030] In this invention, the number of pull ropes is at least three; When performing step S2, determine whether any pull rope is obstructed. If so, the platform door stops descending, issue a level one alarm, record the current position of the slider at the bottom end of the pull rope as the obstruction position, and proceed to step S3; otherwise, do not perform the operation.

[0031] In other words, if an obstacle happens to be inserted between the two pull ropes of the descending platform screen door, preventing the middle pull rope from descending (i.e., the pull rope other than the bottom one is blocked), the platform screen door will still stop descending. The travel position of the platform screen door will still be recorded. To be precise, the position where the obstacle is encountered should be called the stopping position when either pull rope of the platform screen door is blocked. The position of the platform screen door is mainly based on the position of the bottom pull rope.

[0032] When the platform door first encounters an obstruction and stops, a Level 1 alarm is issued, mainly by beeping sounds from the platform door pillars, reminding passengers not to stay under the pull rope and to promptly move their luggage out from under the pull rope.

[0033] S3: After the platform door rises to the preset height, the platform door descends again; If the platform screen door encounters an obstruction while descending, in order to prevent the pull rope from pressing down on the obstacle and making it impossible to remove, the platform screen door needs to be raised to a certain height to release the pressure on the obstacle below. At this time, the platform screen door will still be under a level one alarm so that passengers can receive the reminder and actively remove the obstacle so that the platform screen door can close as soon as possible. Only when the platform screen door is closed can the train leave the station in a timely manner, so as not to delay the train's journey time.

[0034] It should be noted that after the platform doors rise to a preset height, they will pause for a second preset time, that is, a short period of time, such as 5 seconds, to give passengers time to remove obstacles. After the second preset time, the platform doors will descend again.

[0035] S4: After the first preset time, determine whether the real-time travel position of the platform door is lower than the obstruction position. If so, the platform door will descend normally until the lower limit. Otherwise, the platform door will stop descending again, issue a level 2 alarm, and execute step S5. Here, a control rule is introduced: if any pull rope encounters an obstruction, the platform door stops descending. After the platform door attempts to descend a second time, if it encounters an obstruction, it stops; otherwise, it continues to descend normally. In step S4, after the platform door has descended for the first preset time, it checks whether the travel position of the lowest pull rope is below the obstruction position. If so, the obstacle in step S2 has been cleared, and the platform door can continue descending normally until the lower limit. Otherwise, the obstacle in step S2 still exists, the platform door needs to stop descending again, a level two alarm is issued, and step S5 is executed.

[0036] It is important to note that if the platform door encounters obstruction again, and the second obstruction occurs at a higher position than the first, it can be assumed that the obstacle encountered in the first instance has shifted but not completely removed (excluding mechanical malfunctions, since there was no obstruction at the second obstruction position during the first descent). In this case, a level two alarm should be issued, expanding the alarm range to attract platform staff to the obstructed platform door for assistance in removing the obstacle. Conversely, if the second obstruction occurs at a lower position than the first, it means that the platform door's real-time travel position is lower than the obstruction position after the first preset time. Regardless of whether the obstruction point became lower after the first obstruction was shifted or a new obstruction occurred, it is considered a new obstruction point, and the process should return to step S2 to re-perform the first obstruction judgment.

[0037] S5: After receiving the platform door downlink signal again, the platform door continues to descend until it reaches the lower limit.

[0038] Platform staff will proceed to the obstructed platform screen door to handle the situation and remove the obstacle for the passenger. Only after this process will they issue the instruction for the platform screen door to descend again. Upon receiving this signal, the platform screen door control system will ensure the safety of the cable travel position before the platform screen door continues to descend until it reaches the lower limit, completing the descent and closing the door as quickly as possible to avoid delaying the train's departure. When performing step S5, the specific steps include: S51: Determine whether the platform door downlink signal has been received again. If yes, proceed to step S52; otherwise, do not perform the operation. S52: After the platform door rises to the preset height, the power of the drive motor is increased, causing the platform door to descend with increased force until it reaches the lower limit.

[0039] In other words, after the platform staff ensures the safety of the rope descending, they can directly increase the force and speed up the descent of the platform door without worrying about crushing pedestrians or luggage. This can speed up the closing and save time, and also avoid false alarms caused by structural failures of the platform door, thus preventing the door from being forcibly closed.

[0040] Example 2, still as Figure 1 As shown, this is only one embodiment of the present invention. Based on the first embodiment, in the platform door obstruction control method of the present invention, sliders are provided at both ends of the pull rope. In fact, when the platform door descends, it is necessary to obtain the position of the sliders at both ends of the bottom pull rope, that is, there are two real-time travel positions, namely the left travel position and the right travel position.

[0041] Then, when executing step S2, it is determined whether either slider at either end of the pull rope is obstructed. If so, the platform door stops descending, a level one alarm is issued, the current travel position of the platform door on the side closest to the obstructed slider is recorded as the obstruction position, and step S3 is executed; otherwise, no operation is executed.

[0042] For example, if there are n ropes on a platform screen door, then there are n left-side sliders and n right-side sliders. If any of the n left-side sliders encounters an obstacle, the real-time position of the left slider on the bottom rope is the obstacle position, also called the left obstacle position. Similarly, if any of the n right-side sliders encounters an obstacle, the real-time position of the right slider on the bottom rope is the obstacle position, also called the right obstacle position. There is also a special case where one left-side slider and one right-side slider encounter an obstacle simultaneously. In this case, the real-time positions of the sliders at both ends of the bottom rope are recorded as the left obstacle position and the right obstacle position. In this case, the left-side obstacle slider and the right-side obstacle slider may not be located at the same ends of the same rope, and the left obstacle position and the right obstacle position may also be different. If the left-side slider and the right-side slider do not encounter obstacles simultaneously, then there must be a sequence. If the left-side slider encounters an obstacle first, the platform screen door has already stopped immediately, and the right-side slider has not yet reached the obstacle position, so it is no longer considered a right-side obstacle.

[0043] Finally, when executing step S4, after the first preset time, it is determined whether the real-time position of all platform doors on the obstructed side is lower than their obstructed position. If so, the platform doors will descend normally until the lower limit. Otherwise, the platform doors will stop descending again, issue a level 2 alarm, and execute step S5.

[0044] In other words, if any slider on the left side encounters an obstruction, then when the position of the left slider on the bottommost pull rope is lower than its left obstruction position, it means the obstruction has been removed, and the platform door will descend normally to the lower limit. Conversely, if any slider on the right side encounters an obstruction, then when the position of the right slider on the bottommost pull rope is lower than its right obstruction position, it means the obstruction has been removed, and the platform door will descend normally to the lower limit. For example, if both a left slider and a right slider encounter an obstruction at the same time, then only when the positions of both left and right sliders on the bottommost pull rope are lower than their left and right obstruction positions, respectively, does it mean the obstruction has been removed, and the platform door will descend normally to the lower limit.

[0045] Example 3, still as Figure 1 As shown, this is only one embodiment of the present invention. Based on the above embodiment, in the platform door obstruction control method of the present invention, a tension sensing element is provided at the connection between the end of the pull rope and the slider. During the execution of steps S2 to S4, it is determined whether either of the tension sensing elements at both ends of the pull rope is subjected to a tension greater than the first preset tension value. If so, the platform door will be obstructed from descending; otherwise, it will not be obstructed. In other words, the tension sensing element at the slider at the end of the pull rope senses the tension value of the pull rope in real time. Of course, under normal circumstances, when the pull rope does not encounter any obstruction during its descent, a certain static tension will also be formed at the end of the pull rope. The first preset tension value should be greater than the static pressure. In this invention, the first preset tension value is 1.2 to 1.5 times the static pressure. Generally speaking, the longer the pull rope, the greater the flow of people on the platform, or the higher the safety level of the platform, the higher the required tension sensing accuracy needs to be, and the closer the first preset tension value needs to be to the static pressure.

[0046] During the execution of steps S2 to S4, if either of the tension sensing elements at the two ends of any pull rope encounters an obstruction and experiences a tension greater than the first preset tension value, the platform door will stop descending. However, during the execution of step S5, after the staff has arrived and eliminated all obstacle risks, the descending button will be pressed again. At this time, the platform door will receive a descending signal, and the rule of stopping the platform door when encountering an obstruction will be invalidated. Under the observation of the staff, the platform door will descend with increased force with guaranteed safety.

[0047] Of course, the only obstacle the platform screen door might encounter during the downward force application in step S5 is due to a structural problem. The slide rails used for sliding the platform screen door may bend due to thermal expansion and contraction and prolonged tension. Therefore, if a level 2 alarm is issued during step S4 and staff arrive to find no obstruction, it can be concluded that the platform screen door is structurally faulty, and the issue should be reported to the central control center for repair.

[0048] In this invention, the tension sensing element only measures the tension value at the end of the pull rope. It is not limited to using only a tension sensor. In fact, a pressure sensor can also be used. A pressure structure is set between the end of the pull rope and the slider, and a pressure sensor is added to measure the pressure value at the end of the pull rope. Obstacle detection can be performed in the same way.

[0049] Of course, before executing step S3, a preset height value is generated. Generally, the preset height value is not very large. The preset height value is slightly larger than the maximum theoretical deformation value of the rope under the tension of the first preset tension value. That is, an obstacle encounter test is performed at any position of the rope in advance, so that the rope is subjected to the tension of the first preset tension value. After the rope tilts, the height difference between the lowest and highest heights of the rope is the rope deformation value. After performing multiple obstacle encounter tests at any position of the rope, the maximum value is selected from all the rope deformation values, and the preset height value is slightly larger than this maximum value.

[0050] When performing step S3, the specific steps include: S31: The platform door rises to a preset height; S32: Determine whether the pull rope is subjected to a tension greater than the second preset tension value. If so, the platform door stops operating; otherwise, proceed to step S33. S33: After waiting for the second preset time, the platform door will descend again.

[0051] When executing step S32, it is determined whether either of the tension sensing elements at both ends of the pull rope is subjected to a tension greater than the second preset tension value. In other words, if the platform door is also obstructed when it rises, it indicates that the platform door is being maliciously obstructed by human. At this time, the platform door stops operating and issues a level three alarm; otherwise, step S33 is executed.

[0052] Finally, an alarm is installed on the column; When performing step S2, if a level one alarm is issued, an audible and visual alarm will be triggered by the alarm device. When performing step S4, if a level two alarm is issued, an alarm will be sent to the surrounding staff via the alarm device. When executing step S32, if a level 3 alarm is issued, an alarm is sent to the platform control room via the alarm device, prompting emergency personnel, including railway police, to be dispatched to eliminate the risk.

[0053] This invention discloses a platform door obstruction control method. Obstruction control is performed at the pull rope. When the platform door is closing, if the pull rope encounters obstruction while descending, it stops descending and rises a certain distance to facilitate passenger evacuation. If it encounters obstruction a second time, it stops descending again to facilitate staff clearing the area before finally closing the door. This effectively avoids the risks during the platform door closing and downward pressure process. It has a high degree of intelligence, effectively reduces the consumption of manpower and material resources, and ensures the safety of trains leaving the station.

[0054] This invention is not limited to the specific embodiments described above, and various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made to the above embodiments based on the technical essence of this invention should be included within the scope of protection of this invention.

Claims

1. A method for controlling obstruction at platform screen doors, characterized in that, Includes the following steps: S1: When the platform door downlink signal is received, obtain the real-time travel position of the platform door; S2: Determine if the platform screen door encounters an obstruction while descending. If so, the platform screen door stops descending, a Level 1 alarm is issued, the current travel position of the platform screen door is recorded as the obstruction position, and step S3 is executed; otherwise, no operation is executed. S3: After the platform door rises to the preset height, the platform door descends again; S4: After the first preset time, determine whether the real-time travel position of the platform door is lower than the obstruction position. If so, the platform door will descend normally until the lower limit. Otherwise, the platform door will stop descending again, issue a level 2 alarm, and execute step S5. S5: After receiving the platform door downlink signal again, the platform door continues to descend until it reaches the lower limit.

2. The platform door obstruction control method according to claim 1, characterized in that: The platform gate includes a plurality of columns installed on the platform and a platform gate formed by a liftable pull rope installed between two adjacent columns; the columns are provided with sliders for connecting to the pull ropes and drive motors for driving the sliders to slide, and the drive motors are provided with electronic travel recorders. When executing step S1, upon receiving the downlink signal of the platform door, the position of the slider is obtained in real time through the electronic travel recorder, which serves as the real-time travel position of the platform door.

3. The platform door obstruction control method according to claim 2, characterized in that: When performing step S2, it is determined whether either slider at one end of the pull rope is obstructed. If so, the platform door stops descending, a level one alarm is issued, the current travel position of the side of the platform door closest to the obstructed slider is recorded as the obstruction position, and step S3 is executed; otherwise, no operation is performed.

4. The platform door obstruction control method according to claim 3, characterized in that: When executing step S4, after the first preset time, it is determined whether the real-time position of all platform doors on the obstructed side is lower than their obstructed position. If so, the platform doors descend normally until the lower limit. Otherwise, the platform doors stop descending again, a level 2 alarm is issued, and step S5 is executed.

5. The platform door obstruction control method according to claim 2, characterized in that: When performing step S5, the specific steps include: S51: Determine whether the platform door downlink signal has been received again. If yes, proceed to step S52; otherwise, do not perform the operation. S52: After the platform door rises to the preset height, the power of the drive motor is increased, causing the platform door to descend with increased force until it reaches the lower limit.

6. The platform door obstruction control method according to claim 2, characterized in that: When performing step S3, the specific steps include: S31: The platform door rises to a preset height; S32: Determine whether the pull rope is subjected to a tension greater than the second preset tension value. If so, the platform door stops operating; otherwise, proceed to step S33. S33: After waiting for the second preset time, the platform door will descend again.

7. The platform door obstruction control method according to claim 6, characterized in that: A tension sensing element is provided at the connection point between the end of the pull rope and the slider; When executing step S32, it is determined whether either of the tension sensing elements at both ends is subjected to a tension greater than the second preset tension value. If so, the platform door stops running and issues a level three alarm; otherwise, step S33 is executed.

8. The platform door obstruction control method according to claim 6, characterized in that: An alarm is installed on the column; When performing step S2, if a level one alarm is issued, an audible and visual alarm will be triggered by the alarm device. When performing step S4, if a level two alarm is issued, an alarm will be sent to the surrounding staff via the alarm device. When executing step S32, if a level 3 alarm is issued, an alarm is sent to the platform control room via the alarm device.

9. The platform door obstruction control method according to claim 1, characterized in that: Before performing step S3, a preset height value is generated.

10. A platform door obstruction control method according to claim 1, characterized in that: The number of pull ropes is at least three; When performing step S2, determine whether any pull rope is obstructed. If so, the platform door stops descending, issue a level one alarm, record the current position of the slider at the bottom end of the pull rope as the obstruction position, and proceed to step S3; otherwise, do not perform the operation.

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