High-speed rail platform door electronic limiting method

Abstract

The application provides a high-speed rail platform door electronic limiting method, and relates to the field of rail transit technology, and comprises the following steps: S1: after a train departs, a pull rope is lowered to obtain a pull rope original height value; S2: whether power is connected is judged; if yes, S3 is executed; otherwise, no operation is performed; S3: a real-time offset of the pull rope is obtained; S4: whether the real-time offset is greater than a predetermined value is judged; if yes, the pull rope is driven back to the original height value; S5: whether the pull rope still does not return to the original height value within a predetermined time is judged; if yes, the pull rope is driven back by force. The application has high feasibility, adopts a pull rope type shielding door to lengthen the distance between shielding door columns, is suitable for different requirements of different train door opening positions, reduces the energy consumption of the whole shielding door, and adopts an electronic limiting mode after the shielding door is closed; if in a power-on state, the electronic limiting mode is used to block people from pushing open the shielding door; if in a power-off state, no limiting is performed, and emergency escape is facilitated.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and in particular, to an electronic limit switch method for high-speed railway platform 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. This prevents accidental falls and potential dangers. Furthermore, the screen doors must coordinate with the train doors for opening and closing, ensuring convenient passenger boarding and alighting as well as platform safety during normal times. For example, invention patent CN107882470A discloses a method, device, and storage medium for the coordinated control of train doors and platform screen doors. The method includes: determining a first absolute time for simultaneous control of the train doors and platform screen doors at the target station; acquiring a first time required for the train doors from issuing a door control command to completing control; acquiring a second time required for the platform screen doors from issuing a screen door control command to completing control; determining the pending issuance time of the door control command based on the first absolute time and the first time; determining the pending issuance time of the screen door control command based on the first absolute time and the second time; and performing coordinated control of the train doors and platform screen doors based on the pending issuance times of the door control command and the screen door control command. The above-described embodiments of the invention can achieve the purpose of opening and closing simultaneously, avoiding safety hazards for passengers when riding the train and improving the user experience.

[0004] However, the above-mentioned platform screen door control method still has the following problems: After the train screen doors are closed, in order to prevent pedestrians from accidentally touching or deliberately pushing the screen doors open, the screen doors need to be locked after closing. However, in the event of a power outage, if passengers need to escape in an emergency, the operation of unlocking the screen doors is relatively complicated and cannot leave enough escape time, resulting in poor safety.

[0005] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable and efficient electronic limit method for high-speed railway platform doors. Summary of the Invention

[0006] The purpose of this invention is to provide a highly feasible electronic limiting method for high-speed railway platform doors that uses a pull-rope system to extend the distance between the platform door posts, is suitable for different trains with different door opening positions, reduces the energy consumption of the entire platform door, and uses electronic limiting after the platform door is closed. If the power is on, the electronic limiting prevents people from pushing open the platform door; if the power is off, the limiting is not performed, which facilitates emergency escape.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] An electronic limit method for high-speed railway platform screen doors, applicable to the structure of high-speed railway platform screen doors, the structure including several columns and pull ropes disposed between two adjacent columns, each column being equipped with a lifting column for connecting to the pull ropes, and a drive motor for driving the lifting column to rise and fall being disposed at the top of each column, the method including the following steps:

[0009] S1: After the train leaves the platform, the drive motor drives the lifting bollard and the pull rope to descend, and the height value of the pull rope is recorded as the original height value.

[0010] S2: Determine if the drive unit is connected to a power supply; if yes, proceed to step S3; otherwise, do not perform the operation.

[0011] S3: Real-time acquisition of the offset between the current height of the pull rope and the original height value;

[0012] S4: Determine whether the real-time offset is greater than the predetermined value. If so, power is supplied to drive the drive motor to return the rope to the original height value; otherwise, no operation is performed.

[0013] S5: Determine whether the pull rope has not returned to the original height value within the predetermined time. If so, increase the power of the drive motor according to the real-time offset to make the pull rope return to the original height value; otherwise, do not perform the operation.

[0014] As a preferred embodiment of the present invention, the drive unit is electrically connected to a controller, and a height sensor electrically connected to the controller is provided at the pull rope;

[0015] When executing steps S1, S3 to S5, the current height of the rope is obtained by the height sensor and fed back to the controller.

[0016] As a preferred embodiment of the present invention, when performing step S2, it is determined whether the drive motor is connected to a power supply; if so, the controller is turned on and the power supply provides power to the controller.

[0017] As a preferred embodiment of the present invention, the drive motor is connected to a drive chain, one end of which is connected to the lifting column, and the end of which is away from the lifting column is connected to the balance block; the lifting column is provided with a rotating roller and a slider for connecting to the pull rope, the rotating roller is provided with a transmission belt, one end of which is connected to the slider, and the end of which is away from the slider is connected to the column.

[0018] As a preferred embodiment of the present invention, the number of both the slider and the pull rope is at least two, and the lowermost slider is connected to the transmission belt.

[0019] As a preferred embodiment of the present invention, when performing step S1, after the train leaves the platform, the drive motor drives the lifting column and the pull rope to descend, and the height value of the lowest pull rope is recorded as the original height value.

[0020] When performing step S3, the real-time offset between the current height of the bottommost rope and its original height value is obtained.

[0021] During steps S4 and S5, the power supply drives the drive motor to return the lowest pull rope to its original height value.

[0022] As a preferred embodiment of the present invention, if the real-time offset is greater than a predetermined value when performing step S4, timing is started.

[0023] When executing step S5, it is determined whether the pull rope returns to its original height value when the timer reaches the predetermined time; if so, the power of the drive motor is increased according to the real-time offset to make the pull rope return to its original height value; otherwise, no operation is performed.

[0024] As a preferred embodiment of the present invention, when performing step S5, if the pull rope does not return to the original height value when the timing time reaches the predetermined time, the power of the drive motor is increased according to the real-time offset and the timing time value so that the pull rope returns to the original height value.

[0025] As a preferred embodiment of the present invention, a display screen is provided on the column.

[0026] As a preferred embodiment of the present invention, if the pull rope does not return to its original height value within a predetermined time during step S5, an alarm is displayed on the screen.

[0027] The beneficial effects of the electronic limiting method for high-speed railway platform doors of the present invention are as follows: high feasibility, using a pull rope type platform door to lengthen the distance between the platform door columns, suitable for different requirements of different train door opening positions, reducing the energy consumption of the entire platform door, and using electronic limiting after the platform door is closed. If it is in a powered state, electronic limiting is used to prevent people from pushing open the platform door, and if it is in a powered-off state, no limiting is performed, which facilitates emergency escape. Attached Figure Description

[0028] Figure 1 This is a flowchart illustrating an electronic limit method for high-speed railway platform doors according to the present invention.

[0029] Figure 2 This is a schematic diagram of the shielding door structure in the electronic limiting method for high-speed railway platform doors of the present invention;

[0030] Figure 3 This is a schematic diagram of the column structure in the electronic limiting method for high-speed railway platform doors of the present invention;

[0031] Figure 4 This is a schematic diagram of the rope lifting structure in the electronic limit method for high-speed railway platform doors of the present invention;

[0032] In the diagram: 1. Column, 11. Drive motor, 111. Drive sprocket, 12. Drive chain, 13. Balance block, 14. Display screen, 2. Lifting column, 21. Slider, 22. Rotating roller, 23. Drive belt, 3. Pull rope. Detailed Implementation

[0033] The following are specific embodiments of the present invention, which further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0034] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement of modules and structures set forth in these embodiments does not limit the scope of the invention.

[0035] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0036] Techniques, methods, and systems known to a person skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the license specification.

[0037] Example 1: As Figures 1 to 4 The image shown is merely one embodiment of the present invention: an electronic limit method for high-speed railway platform doors, applicable to high-speed railway platform door structures. The structure includes several columns 1 and pull ropes 3 disposed between adjacent columns 1. Each column 1 is equipped with a lifting column 2 for connecting to the pull rope 3. The top of each column 1 is equipped with a drive motor 11 for driving the lifting column 2 to move up and down.

[0038] In this invention, the drive motor 11 controls the lifting column 2 to rise and fall, thereby driving the pull rope 3 to rise and fall, thus completing the opening and closing of the shielding door.

[0039] When a train enters the station, the drive motor raises bollard 2, opening the platform screen door. After the train leaves the station, the drive motor lowers bollard 2, closing the platform screen door, thus preventing pedestrians from crossing the platform screen door and falling onto the platform, which could be dangerous.

[0040] In this invention, the door opening positions of different trains are statistically analyzed. Columns 1 are installed on both sides of multiple door opening positions, and a pull rope 3 is installed between two columns 1 to form a platform screen door structure. A lifting column 2 is installed on each column 1, and a slider 21 is installed on each lifting column 2. The lifting column 2 can move up and down along the column 1, and the slider 21 can also slide up and down on the lifting column 2, allowing the pull rope 3 to move up and down. Normally, the slider 21 at the end of the pull rope 3 is located at the lower part of the column 1, blocking the lower area between the two columns 1 to prevent people from falling onto the platform. When a train enters the station, the slider 21 is raised, so that the pull rope 3 is located on the upper side between the two columns 1. This allows passengers to board and alight below the pull rope 3, and all multiple door opening positions of the train are located between two columns, allowing passengers to board and alight normally regardless of the train type.

[0041] Generally, the distance between two pillars 1 is at least 9 meters, which includes at least one door opening position for each type of train. Of course, since the train is very long, there should be more pillars 1 and more sets of ropes 3 for the safety shielding of the entire platform. Because the platform screen door adopts the rope 3 structure, it is not only suitable for different trains to open the door, but also the entire platform screen door is lighter and the opening and closing of the screen door is more energy-efficient.

[0042] The method includes the following steps:

[0043] S1: After the train leaves the platform, the drive motor drives the lifting bollard and the pull rope to descend, and the height value of the pull rope is recorded as the original height value.

[0044] S2: Determine if the drive unit is connected to a power supply; if yes, proceed to step S3; otherwise, do not perform the operation.

[0045] In other words, the following steps for electronic limit switching are only performed when the drive motor is powered on, i.e. when the drive motor is normally powered on. Otherwise, the drive motor is de-powered and cannot perform electronic limit switching, and people can freely push open the shielded door for emergency escape.

[0046] S3: Real-time acquisition of the offset between the current height of the pull rope and the original height value;

[0047] The real-time offset should include the offset distance and offset direction. The real-time offset can be positive or negative, and the offset direction is indicated by the positive or negative number. For example, if the real-time offset is +3, then it means that the offset is 3 centimeters upward. Or, if the real-time offset is -5, then it means that the offset is 5 centimeters downward.

[0048] S4: Determine whether the real-time offset is greater than the predetermined value. If so, power is supplied to drive the drive motor to return the rope to the original height value; otherwise, no operation is performed.

[0049] For example, if the preset value is set to 10 centimeters, and the offset distance is greater than 10 centimeters, there is a danger that pedestrians may cross and reach the train tracks, so electronic limiters are required.

[0050] At this point, the drive motor starts working, driving the pull rope back to its original height value. If the pull rope shifts upward by +15 centimeters, the drive motor will drive the pull rope downward until it returns to its original height value.

[0051] Here, the absolute value of the real-time offset is actually greater than the predetermined value.

[0052] S5: Determine whether the pull rope has not returned to the original height value within the predetermined time. If so, increase the power of the drive motor according to the real-time offset to make the pull rope return to the original height value; otherwise, do not perform the operation.

[0053] For example, if the preset time is set to 15 seconds, and the pull rope still does not return to its original height after 15 seconds, it means that people are pushing the platform screen door with great force. At this time, the pull rope should be driven with more force to return to its original height. Since the degree of danger varies depending on the amount of pull rope offset, the power of the drive motor needs to be increased according to the real-time offset to make the pull rope return to its original height. In other words, the greater the offset of the pull rope when pushed or pulled by external force, the higher the risk for pedestrians to pass through the platform screen door, and the greater the force needed to push the pull rope back to its original position to ensure pedestrian safety.

[0054] Here, the drive motor 11 is electrically connected to a controller, and a height sensor electrically connected to the controller is provided at the pull rope;

[0055] When executing steps S1, S3 to S5, the current height of the rope is obtained by the height sensor and fed back to the controller.

[0056] Of course, when executing step S2, it is determined whether the drive motor is connected to a power supply; if so, the controller is turned on and the power supply provides power to the controller.

[0057] Height sensors typically have a built-in power supply. This means that when electronic limit is activated, only a small current needs to be supplied to the controller to detect any abnormalities in the pull rope in real time and to activate electronic limit when an abnormality occurs. The entire structure consumes little power and is safe.

[0058] Example 2: As before Figures 1 to 4The illustration shown is merely one embodiment of the present invention. Based on Embodiment 1, in the electronic limit method for high-speed railway platform doors of the present invention, the drive motor 11 is connected to a drive chain 12, one end of the drive chain 12 is connected to the lifting column 2, and the end of the drive chain 12 away from the lifting column 2 is connected to the balance block 13; the lifting column 2 is provided with a rotating roller 22 and a slider 21 for connecting to the pull rope 3, the rotating roller 22 is provided with a transmission belt 23, one end of the transmission belt 23 is connected to the slider 21, and the end of the transmission belt 23 away from the slider 21 is connected to the column 1.

[0059] When the rope 3 is raised or lowered, the lifting column 2 is mounted on the column 1. The column 1 is equipped with a balance block 13. The top of the column 1 is equipped with a drive motor 11 and a drive chain 12 connected to the drive motor 11. One end of the drive chain 12 is connected to the lifting column 2, and the end of the drive chain 12 away from the lifting column 2 is connected to the balance block 13. In this way, when the drive motor 11 works, it can drive the drive chain 12 to transmit power and drive the lifting column 2 to rise or fall. When the drive motor 11 rotates forward, the lifting column 2 rises, and vice versa. The lifting column 2 and the balance block 13 are respectively located on both sides of the drive motor 11 to balance the lifting force of the lifting column 2, so that the drive motor 11 can complete the raising and lowering of the lifting column 2 with less power.

[0060] Furthermore, a display screen 14 is installed on the column 1. The display screen 14 is an e-ink screen. E-ink screens have low energy consumption. They only need to be supplied with a weak current when the content displayed on the screen changes. They do not need to consume energy under normal circumstances. Generally, the power consumption of an e-ink screen is about 5 watts. Compared with a large LED display screen, this can further improve the energy-saving effect of the entire shielding door structure.

[0061] Based on the structure of the pull cord 3, the e-ink screen, and the drive motor 11 with the balance block 13, the power supply requirements of the entire column 1 are greatly reduced.

[0062] It should be noted that the lifting column 2 is provided with a rotating roller 22, and the rotating roller 22 is provided with a transmission belt 23. One end of the transmission belt 23 is connected to the slider 21, and the end of the transmission belt 23 away from the slider 21 is connected to the column 1.

[0063] The slider 21 can slide along the lifting column 2, and the rotating roller 22 has no independent power. The rotation power of the rotating roller 22 comes from the lifting of the lifting column 2. When the drive motor 11 drives the lifting column 2 to rise, the column 1 itself descends relative to the lifting column 2, causing the end of the transmission belt 23 connected to the column 1 to move downward relative to the lifting column 2. Then, driven by the transmission belt 23, the slider 21 naturally rises relative to the lifting column 2.

[0064] The slider 21 is connected to the end of the pull rope 3, so when the drive motor 1 drives the lifting column 2 to rise, the pull rope 3 has two stages of rising.

[0065] In this way, the two-stage lifting structure is used to raise and lower the pull rope 3 to complete the opening and closing of the platform screen door. Moreover, the lifting column 2 is balanced by the weight of the balance block 13, so that the drive motor 11 only needs a small amount of power to drive the pull rope 3 to raise and lower, which has a good energy-saving effect. When the pull rope 3 is raised, it is convenient for passengers to get on and off the train, and when the pull rope is lowered, it can effectively prevent people from falling off the platform, which is highly safe.

[0066] Finally, the drive motor 11 is provided with a drive sprocket 111, and the drive chain 12 is engaged with the drive sprocket 111.

[0067] Example 3: As before Figures 1 to 4 As shown, this is only one embodiment of the present invention. Based on any of the above embodiments, in the electronic limiting method for high-speed railway platform doors of the present invention, the number of sliders 21 and pull ropes 3 is at least two, and the lowermost slider 21 is connected to the transmission belt 23.

[0068] When performing step S1, after the train leaves the platform, the drive motor drives the lifting bollard and the pull rope to descend, and the height value of the lowest pull rope is recorded as the original height value.

[0069] When performing step S3, the real-time offset between the current height of the bottommost rope and its original height value is obtained.

[0070] During steps S4 and S5, the power supply drives the drive motor to return the lowest pull rope to its original height value.

[0071] Furthermore, if the real-time offset is greater than the predetermined value when executing step S4, timing will begin.

[0072] When executing step S5, it is determined whether the pull rope returns to its original height value when the timer reaches the predetermined time; if so, the power of the drive motor is increased according to the real-time offset to make the pull rope return to its original height value; otherwise, no operation is performed.

[0073] Furthermore, when performing step S5, if the pull rope does not return to its original height value when the timer reaches the predetermined time, the power of the drive motor is increased according to the real-time offset and the timer value to make the pull rope return to its original height value.

[0074] Of course, the column 1 is equipped with a display screen 14. So, when performing step S5, if the rope does not return to its original height value within a predetermined time, an alarm will be displayed on the display screen to remind pedestrians to stop abnormal behavior.

[0075] This invention provides an electronic limiting method for high-speed railway platform screen doors, which is highly feasible. It adopts a pull-rope type screen door to extend the distance between the screen door columns, which is suitable for different trains with different door opening positions. It reduces the energy consumption of the entire screen door. After the screen door is closed, it uses an electronic limiting method. If the power is on, it uses an electronic limiting method to prevent people from pushing open the screen door. If the power is off, it does not use the limiting method, which facilitates emergency escape.

[0076] 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 electronic limiting of high-speed railway platform doors, characterized in that, This structure is suitable for high-speed railway platform screen doors. It includes several columns (1) and a pull rope (3) positioned between adjacent columns (1). Each column (1) has a lifting column (2) for connecting to the pull rope (3). The top of each column (1) has a drive motor (11) for driving the lifting column (2) to move up and down. The drive motor (11) is connected to a drive chain (12). One end of the drive chain (12) is connected to the lifting column (2), and the end of the drive chain (12) away from the lifting column (2) is connected to a level... The balance block (13) is connected; the lifting column (2) is provided with a rotating roller (22) and a slider (21) for connecting with the pull rope (3). The rotating roller (22) is provided with a transmission belt (23). One end of the transmission belt (23) is connected to the slider (21), and the end of the transmission belt (23) away from the slider (21) is connected to the column (1); the number of sliders (21) and pull ropes (3) is at least two, and the lowest slider (21) is connected to the transmission belt (23); The method includes the following steps: S1: After the train leaves the platform, the drive motor drives the lifting bollard and the pull rope to descend, and the height value of the pull rope is recorded as the original height value. S2: Determine if the drive unit is connected to a power supply; if yes, proceed to step S3; otherwise, do not perform the operation. S3: Real-time acquisition of the offset between the current height of the pull rope and the original height value; S4: Determine whether the real-time offset is greater than the predetermined value. If so, power is supplied to drive the drive motor to return the rope to the original height value; otherwise, no operation is performed. S5: Determine whether the pull rope has not returned to the original height value within the predetermined time. If so, increase the power of the drive motor according to the real-time offset to make the pull rope return to the original height value; otherwise, do not perform the operation.

2. The electronic limit method for high-speed railway platform doors according to claim 1, characterized in that: The drive unit (11) is electrically connected to a controller, and a height sensor electrically connected to the controller is provided at the pull rope. When executing steps S1, S3 to S5, the current height of the rope is obtained by the height sensor and fed back to the controller.

3. The electronic limit method for high-speed railway platform doors according to claim 2, characterized in that: When executing step S2, it is determined whether the drive motor is connected to a power supply; if so, the controller is turned on and the power supply provides power to the controller.

4. The electronic limit method for high-speed railway platform doors according to claim 1, characterized in that: When performing step S1, after the train leaves the platform, the drive motor drives the lifting bollard and the pull rope to descend, and the height value of the lowest pull rope is recorded as the original height value. When performing step S3, the real-time offset between the current height of the bottommost rope and its original height value is obtained. During steps S4 and S5, the power supply drives the drive motor to return the lowest pull rope to its original height value.

5. The electronic limit method for high-speed railway platform doors according to claim 1, characterized in that: If the real-time offset is greater than the predetermined value when executing step S4, then timing will begin. When executing step S5, it is determined whether the pull rope has not returned to the original height value when the timer reaches the predetermined time; if so, the power of the drive motor is increased according to the real-time offset to make the pull rope return to the original height value; otherwise, no operation is performed.

6. The electronic limit method for high-speed railway platform doors according to claim 1, characterized in that: When performing step S5, if the pull rope does not return to its original height value when the timer reaches the predetermined time, the power of the drive motor is increased according to the real-time offset and the timer value so that the pull rope returns to its original height value.

7. The electronic limit method for high-speed railway platform doors according to claim 1, characterized in that: A display screen (14) is installed on the column (1).

8. The electronic limit method for high-speed railway platform doors according to claim 7, characterized in that: If the rope does not return to its original height value within the predetermined time when step S5 is executed, an alarm will be displayed on the screen.

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