Rope breakage detection method for pull rope safety door

Abstract

The invention provides a rope breakage detection method for a pull rope safety door, and relates to the technical field of high-speed rail platform doors, and the method comprises the following steps: S1, driving a pull rope to lift so that the heights of the two ends of the pull rope are the same; s2, judging whether the difference between the tension values at the two ends of the pull rope is smaller than a preset tension difference value or not; if yes, executing the step S3; otherwise, a first-level alarm is given out; s3, only one end of the pull rope is driven to move by a preset distance value; s4, judging whether the tension values at the two ends of the pull rope are not less than a preset tension value or not; if yes, not executing the operation; otherwise, a second-level alarm is given out. The two ends of the pull rope are completely leveled firstly, then one end of the pull rope is driven to move, meanwhile, the tension change of the end of the pull rope is obtained, an alarm of rope breakage is given out when the tension is abnormal, platform workers are reminded to eliminate risks, someone is prevented from passing through the platform door while the machine is still, and high safety of the platform is ensured.

Description

Technical Field

[0001] This invention relates to the field of high-speed railway platform screen door technology, and in particular, to a method for detecting broken ropes in a pull-rope safety door. 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 long pull ropes between two gateposts. In this way, the width of the gateposts accounts for a small proportion of the total width of the platform screen door. The opening position of the corresponding train model can also be controlled by the length of the pull ropes. For example, Chinese invention patent CN120007055B provides a safety door structure with multiple pull ropes, which relates to the field of platform screen door technology. It includes fixed columns and lifting parts. The lifting parts are provided with a first plate and a second plate. Safety door pull ropes are connected to both the first plate and the second plate. The first and second plates are constructed as follows: when the safety door is closed, the height of the first plate is greater than that of the second plate; when the lifting unit begins to rise, the first and second plates rise synchronously; after the lifting unit rises to the preset height, the rising speed of the second plate is greater than that of the first plate; this invention uses multiple plates connected by pull ropes to form a safety door. The multiple plates rise synchronously in the initial stage of the safety door's rise, and the fixed spacing of all pull ropes prevents objects from being accidentally caught and causing hidden dangers. After reaching the safe height, the lower plate rises at a faster speed, so that the safety door has sufficient protective height when it is lowered, occupies little height when it is raised, the whole structure is simple, not easy to be damaged, and has high safety.

[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 passengers had crossed the yellow line. However, after installing multiple platform screen door pillars, the view is obstructed, and a small number of staff cannot promptly detect anyone intruding outside the platform screen door. Although the pull rope can prevent pedestrians from crossing to some extent, the pull rope still faces the risk of weathering and breakage after long-term use, and there is also the risk of the pull rope being cut by people. Once the pull rope breaks, not only can passengers easily pass through the platform screen door, but when the platform screen door is opened, the broken ten-meter-long pull rope can easily trip passengers, trap passenger luggage, or even intrude into the train tracks, causing serious risks. There are still safety hazards when trains enter and leave the station.

[0006] Therefore, in order to solve the above problems, it is necessary for us to design a rope breakage detection method for pull-rope safety gates. Summary of the Invention

[0007] The purpose of this invention is to provide a method for detecting broken ropes in a pull-rope safety gate. First, both ends of the pull rope are made completely horizontal, and then one end of the pull rope is driven to move. At the same time, the change in tension at the end of the pull rope is acquired. When the tension is abnormal, a broken rope alarm is issued to remind platform staff to eliminate the risk and prevent people from taking the opportunity to pass through the platform gate, thus ensuring a high level of safety on the platform.

[0008] To achieve the above objectives, the present invention employs the following technical solution:

[0009] A method for detecting broken ropes in a pull-rope safety gate, and a structure for detecting broken ropes in a pull-rope safety gate, the structure comprising a platform gate formed by a plurality of uprights installed on a platform and a plurality of liftable pull ropes installed between two adjacent uprights.

[0010] The method includes the following steps:

[0011] S1: Drive the pull rope to raise and lower so that the two ends of the pull rope are at the same height;

[0012] S2: Determine whether the difference in tension between the two ends of the pull rope is less than the preset tension difference; if so, proceed to step S3; otherwise, issue a level one alarm.

[0013] S3: Only drive one end of the pull rope to move a preset distance value;

[0014] S4: Determine whether the tension values ​​at both ends of the pull rope are not less than the preset tension value; if so, do not perform the operation; otherwise, issue a level 2 alarm.

[0015] As a preferred embodiment of the present invention, the platform gate column is provided with a slider for connecting to the end of the pull rope and a motor for driving the slider to slide, and a controller is provided on the column;

[0016] When performing step S1, an electrical connection is established between the controllers on the columns at both ends of the platform door, and the lifting stroke position of the two sliders at both ends of the pull rope is obtained in real time. The controller controls the motor to rotate, so that the sliders at both ends of the pull rope have the same stroke position, thereby making the two ends of the pull rope the same height.

[0017] As a preferred embodiment of the present invention, the slider is provided with a tension sensor for connection with the pull rope; the tension sensor is electrically connected to the controller;

[0018] During steps S2 and S4, the controller obtains the tension value at the end of the pull rope through the tension sensor.

[0019] As a preferred embodiment of the present invention, before performing step S2, a preset tension difference is generated based on the length and material of the pull rope;

[0020] Before performing step S4, a preset tension value is generated based on the length and material of the pull rope.

[0021] As a preferred embodiment of the present invention, the number of pull ropes is at least two;

[0022] When performing step S2, the specific steps are as follows:

[0023] S21: The controller acquires the readings of the tension sensors at both ends of all the pull ropes on a platform door in real time, and marks the tension sensors at both ends of a pull rope as the same group of tension sensors;

[0024] S22: Determine whether the difference in tension values ​​of all groups of tension sensors is not greater than the preset tension difference. If yes, proceed to step S3; otherwise, issue a level one alarm.

[0025] As a preferred embodiment of the present invention, a connecting buckle is provided between two adjacent pull ropes;

[0026] When performing step S2, the preset tension difference is one-quarter of the weight of the entire rope.

[0027] As a preferred embodiment of the present invention, a preset distance value is generated before performing step S3;

[0028] Furthermore, the preset distance value is not less than the maximum preset safety error displacement value.

[0029] As a preferred embodiment of the present invention, when performing step S4, the preset tension value is the tension value of the end of the rope with the lower height when the maximum preset safety error displacement value of the rope end displacement is reached.

[0030] As a preferred embodiment of the present invention, step S4 is specifically performed as follows:

[0031] S41: Determine whether the time interval between the changes in the tension values ​​at both ends of the pull rope is not less than the preset time difference. If yes, proceed to step S42; otherwise, issue a level 2 alarm.

[0032] S42: Determine whether the tension value at all ends of the pull rope is not less than the preset tension value. If so, do not perform the operation; otherwise, issue a level 2 alarm.

[0033] As a preferred embodiment of the present invention, an alarm is provided on the column;

[0034] During step S2, a level one alarm is issued via the alarm device;

[0035] When performing step S4, a secondary alarm is issued via the alarm device.

[0036] In a second aspect, an apparatus is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement a rope breakage detection method for a pull-rope safety gate provided by any of the implementations of the first aspect above.

[0037] Thirdly, embodiments of this application provide a computer storage medium storing a computer program, which includes program instructions. When executed by a processor, the program instructions can implement a rope breakage detection method for a pull-rope safety door provided in any of the implementations of the first aspect.

[0038] The beneficial effects of the rope breakage detection method for a pull-rope safety gate of the present invention are as follows: First, the two ends of the pull rope are made completely horizontal, and then one end of the pull rope is driven to move. At the same time, the change in tension at the end of the pull rope is obtained. When the tension is abnormal, a rope breakage alarm is issued to remind the platform staff to eliminate the risk and prevent people from taking the opportunity to pass through the platform door, thus ensuring a high level of safety on the platform. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of a rope breakage detection method for a pull-rope safety door according to the present invention;

[0040] Figure 2 The diagram below shows the structure of the platform door in the invention patent CN120007055B in the background art. Detailed Implementation

[0041] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0042] 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.

[0043] 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.

[0044] Example 1: As Figure 1 , 2 As shown, Figure 1 This is a schematic diagram of a rope breakage detection method for a pull-rope safety gate according to the present invention. It is only one embodiment of the present invention. A rope breakage detection method for a pull-rope safety gate is used for a rope breakage detection structure for a pull-rope safety gate. The structure includes a platform gate formed by a plurality of columns installed on the platform and a plurality of liftable pull ropes installed between two adjacent columns.

[0045] First, let's explain platform screen doors. Platform screen doors are installed on the platform, primarily high-speed rail platforms. The following explanation will also use high-speed rail platforms as an example, but it doesn't exclude the possibility of subway platforms, regular train platforms, or even bus stops. 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 or squeezed into the gap between the train and the platform. Therefore, platform screen doors are installed on the platform. After the train comes to a complete stop, the platform screen doors open, allowing passengers to board and alight. After boarding and alighting are complete, the platform screen doors close, allowing the train to depart again. This effectively protects passengers behind the platform screen doors when trains enter and leave the station, significantly reducing the risk of falling onto the platform.

[0046] The platform screen door structure includes several columns installed on the platform and a platform screen door formed by liftable ropes installed between two adjacent columns. Of course, two columns and the ropes between two columns form a platform screen door body, and multiple platform screen door bodies together form a complete platform screen door. For example, 31 columns are used to form 30 platform screen door bodies to protect the entire 500-meter platform. The width of each platform screen door body is about 16 meters, which means the length of the rope is about 16 meters. This application only uses one platform safety door body as an example for explanation, but all doors on the entire platform are tested for breakage at the same time.

[0047] The platform door structure in the rope breakage detection structure of the pull-rope safety door in this invention refers to the Chinese invention patent CN120007055B in the background art. The column includes a fixed column and a lifting part set on the fixed column. The lifting part is provided with a first plate and a second plate. Several safety door pull ropes (the safety door is the platform door) are connected to the first plate and the second plate. The fixed column is the doorpost of the platform door. The lifting part set on the fixed column is connected to the safety door pull rope. The two ends of the safety door pull rope are respectively connected to the lifting parts on the two fixed columns to form a pull-rope safety door structure. The lifting part rises and falls on the fixed column, that is, the safety door opens and closes. After the lifting part rises on the fixed column, the safety door opens, allowing passengers to pass under the safety door pull rope for getting on and off the train when it stops. Conversely, after the lifting part falls on the fixed column, the safety door closes, blocking passengers from passing through for safety protection when the train is running.

[0048] There should be at least two guy ropes between the two pillars. The distance between any two guy ropes should not exceed 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 exceed 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).

[0049] Platform screen doors are positioned 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 prevents people's arms from passing through the 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 doors are initially lowered. After the train enters the station and comes to a complete stop, the pull ropes are raised until the lowest pull rope is at least 2 meters above the platform ground, allowing pedestrians to pass under the pull ropes to board or alight from the train. After pedestrians have boarded or alighted, the pull ropes are lowered again to block pedestrians before the train departs the station.

[0050] Therefore, the pull ropes of the platform screen doors must be kept taut to prevent someone from deliberately spreading the two pull ropes and passing through the platform screen doors between the two pull ropes to reach the intrusion area. At the same time, the pull ropes must not break. Once one pull rope breaks, a large space will be created at the break point, and someone may take the opportunity to pass through the platform screen doors to reach the intrusion area.

[0051] This invention provides a method for detecting broken ropes in a pull-cord safety gate, designed to prevent passengers from crossing the platform screen door and reaching the intrusion area when the pull rope breaks. The method includes the following steps:

[0052] S1: Drive the pull rope to raise and lower so that the two ends of the pull rope are at the same height;

[0053] To verify that the pull rope is intact and taut between the two pillars, the platform screen door needs to be aligned to ensure it is in normal working order. This also allows for observation of whether the structure of the platform screen door is under normal stress.

[0054] The platform screen door's uprights are equipped with sliders for connecting to the ends of the pull rope and motors for driving the sliders to slide. A controller is also mounted on the uprights. In this invention, the slider is the first plate and / or the second plate. A motor is mounted on the upper end of the fixed column of the upright. The motor drives a traction belt to pull the slider up and down, thereby driving the end of the pull rope to rise and fall. Since the pull rope has two ends, there are two motors. The controller on the uprights controls the motors and obtains their current rotation position in real time, thus determining the current lifting and lowering position of the slider and pull rope. Simultaneously, data communication between the controllers of the two uprights is established to drive the motors at both ends of the pull rope to work synchronously, enabling synchronous lifting and lowering control of the pull rope ends, facilitating the horizontal opening and closing of the platform screen door.

[0055] Therefore, when performing step S1, an electrical connection is established between the controllers on the columns at both ends of the platform door, and the lifting stroke position of the two sliders at both ends of the pull rope is obtained in real time. The controller controls the motor to rotate, so that the stroke positions of the sliders at both ends of the pull rope are the same, thereby making the height of both ends of the pull rope the same.

[0056] S2: Determine whether the difference in tension between the two ends of the pull rope is less than the preset tension difference; if so, proceed to step S3; otherwise, issue a level one alarm.

[0057] After correcting the posture of the platform screen door to ensure it is horizontal, further verification of the tension of the pull ropes of the platform screen door in its normal state is required.

[0058] It should be noted that all the pull ropes are of the same specification and are taut and roughly horizontal between the two posts. Therefore, theoretically, the tension values ​​at the ends of all the pull ropes between the two posts are not much different. In fact, it can be said that when multiple pull ropes are in the same position, the tension at the ends of multiple pull ropes will be exactly the same. Furthermore, the tension at both ends of each pull rope is also the same.

[0059] Considering the airflow on the platform and the slight bending of some of the ropes, there is a small difference in tension between the two ends of the rope. Once the rope breaks in the middle, the difference in tension between the two ends will change.

[0060] If the difference in tension between the two ends of the pull rope is too large and not less than the preset tension difference, then there is an abnormal tension at least at one end of the pull rope, and a level one alarm needs to be issued; conversely, if the difference in tension between the two ends of the pull rope is less than the preset tension difference and is in the state of "no abnormality found", then step S2 needs to be executed to further test the safety of the pull rope.

[0061] With a platform having a dozen or so platform gates, frequent alarms can lead to a significant waste of manpower for platform staff. Therefore, to avoid false alarms, the preset tension difference should be set higher. Under normal circumstances, the tension difference between the two ends of the pull rope will not exceed the preset tension difference, so no alarm will be triggered. Therefore, defining the preset tension difference is crucial. Ideally, based on the current structure of the pull rope, simulate the tension difference between the two ends of the pull rope when it breaks, and simulate all locations where the rope breaks. Obtain a large number of tension differences and take the minimum value so that once the pull rope breaks, the tension difference between the two ends will not be less than this preset tension difference. Similarly, when the pull rope is normal and not broken, the tension difference between the two ends of the pull rope will be small and will not exceed this preset tension difference.

[0062] If the difference in tension between the two ends of the pull rope is not less than the preset tension difference, then there must be an abnormal tension at at least one pull rope, which has exceeded the natural state of the pull rope, and further testing is required. Step S3 should be executed.

[0063] S3: Only drive one end of the pull rope to move a preset distance value;

[0064] To further monitor the condition of the pull rope, it is necessary to disrupt its normal horizontal state. This involves the controller controlling the motor to drive only one end of the pull rope to move by a preset distance, while the other end of the pull rope remains in its original position without any movement.

[0065] In this way, the pull rope is changed from a horizontal to an inclined setting. As a flexible component, the pull rope is stretched. By checking the stress on the pull rope again, we can determine whether the pull rope has broken.

[0066] S4: Determine whether the tension values ​​at both ends of the pull rope are not less than the preset tension value; if so, do not perform the operation; otherwise, issue a level 2 alarm.

[0067] During the displacement of one end of the drive rope, both ends of the rope are set flush. However, due to the inherent weight of the rope itself, it is impossible for it to extend in a straight line. There will inevitably be a downward bend in the middle of the rope. To prevent passengers from prying open the gap between the two ropes and passing through the platform door, it needs to be tightened. Tightening here does not mean that the rope is set in a completely straight line, but that there is a certain tension force, making it difficult for the rope to be pried open. After the displacement of one end of the drive rope, the distance between the two ends of the rope will inevitably increase, and the rope will inevitably become more taut, resulting in a greater tensile force at both ends of the rope.

[0068] Therefore, under normal circumstances, after the pull rope is displaced by a preset distance, the tension at both ends of the pull rope should not be less than the preset tension value. This indicates that the pull rope has been tightened and the tension caused by the rope deformation has been transmitted normally, so no operation is required. Conversely, if the tension at either end of the pull rope is less than the preset tension value, it means that the tensioning force of the pull rope has not been transmitted, i.e., the pull rope has broken. A level two alarm needs to be issued to remind the staff that there is a risk of the pull rope breaking and to check and repair it in time.

[0069] It should be noted that a preset distance value is generated before performing step S3;

[0070] Furthermore, the preset distance value is not less than the maximum preset safety error displacement value;

[0071] The maximum preset safety error displacement value refers to the displacement of the two ropes when the two ends are at the same height, such that a pedestrian can pass through the gap between them. The displacement of the ropes when they are stretched is the maximum preset safety error displacement value. In other words, under normal conditions, the displacement of any position of the rope cannot exceed the maximum preset safety error displacement value. In step S3, the position of the two ends of the rope is changed by driving the slider to move, and this change needs to be large enough to more accurately determine whether the rope has broken. Therefore, the preset distance value of driving the displacement of one end of the rope is not less than the above-mentioned maximum preset safety error displacement value.

[0072] As mentioned earlier, the distance between any two ropes is about 30cm. When the distance between the two ropes becomes 40cm, it is enough for a pedestrian to pass through. Considering that there are two ropes, that is, the upper rope is stretched upwards and the lower rope is stretched downwards, then a pedestrian can pass through when each rope is displaced by 5cm. Therefore, the maximum preset safety error displacement value is 5cm. Normally, the two ends of the ropes are pulled tight, so it takes a lot of strength for a pedestrian to stretch the ropes apart by 5cm. Unless it is a specific athlete or a machine is used, the average person cannot stretch the ropes apart to the maximum preset safety error displacement value.

[0073] Accordingly, when executing step S4, the preset tension value is the minimum tension value at both ends of the pull rope when the maximum preset safety error displacement value of the pull rope end displacement is reached. That is, before executing step S4, the maximum preset safety error displacement value of one end of the pull rope is simulated, and the minimum tension value at both ends of all pull ropes is obtained as the preset tension value. This ensures that as long as the pull rope has not broken and the preset distance value of the pull rope end displacement is reached, the tension at the ends of all pull ropes will not be less than the preset tension value. However, if the tension value at any end of any pull rope is less than the preset tension value, the pull rope will break and a level two alarm will be issued.

[0074] Of course, when performing the tests in steps S3 and S4, in order to avoid the displacement of one end of the pull rope causing obstruction of the pull rope platform door's lifting and lowering, the safety test needs to avoid the lifting and lowering of the platform pull rope door, and cannot delay the opening and closing of the pull rope platform door. In other words, it is necessary to ensure that the pull rope is in a completely closed or fully open state, and a time difference needs to be left between the test process and the lifting and lowering of the pull rope.

[0075] Therefore, during the safety inspection of the platform screen doors, the current time and the current train timetable are obtained. A platform screen door safety inspection is performed at preset time intervals. Before each inspection, a check is performed to determine if any trains have entered or exited the station within the preset time value. If so, the safety inspection is postponed until all trains have entered or exited the station. Then, another check is performed to determine if any trains have entered or exited the station within the preset time value. Only when no trains have entered or exited the station within the preset time value is the platform screen door pull rope safety inspection performed normally. After step S4, i.e., after the safety inspection is completed, regardless of whether an alarm is triggered, the pull rope platform screen door must be returned to its normal position. In the normal state, the displacement of one end of the pull rope in step S3 is reversed to restore it, making the height of both ends of the pull rope the same. So, if the platform door did not rise or fall after the last safety inspection, the height of both ends of the pull rope will naturally be the same when step S1 is performed in the next safety inspection. However, this does not eliminate the need to execute step S1. After all, the platform door may have risen or fallen after the last safety inspection, resulting in a certain error in the height of both ends of the pull rope. Therefore, step S1 must be executed first for each safety inspection to correct the height error of both ends of the pull rope, ensuring that the height of both ends of the pull rope remains the same when the inspection starts, making the inspection more accurate.

[0076] This invention discloses a method for detecting broken ropes in a pull-rope safety gate. First, both ends of the pull rope are made completely horizontal, and then one end of the pull rope is driven to move. At the same time, the change in tension at the end of the pull rope is acquired. When the tension is abnormal, a broken rope alarm is issued to remind platform staff to eliminate the risk and prevent people from taking the opportunity to pass through the platform gate, thus ensuring a high level of safety on the platform.

[0077] Example 2, still as Figure 1 , 2 As shown, this is only one embodiment of the present invention. Based on the first embodiment, in the rope breakage detection method of the pull rope safety door of the present invention, the slider is provided with a tension sensor for connecting to the pull rope; the tension sensor is electrically connected to the controller.

[0078] During steps S2 and S4, the controller obtains the tension value at the end of the pull rope through the tension sensor.

[0079] Of course, before performing step S2, a preset tension difference is generated based on the length and material of the pull rope;

[0080] Similarly, before performing step S4, a preset tension value is generated based on the length and material of the pull rope.

[0081] In this invention, the number of pull ropes is at least two;

[0082] When performing step S2, the specific steps are as follows:

[0083] S21: The controller acquires the readings of the tension sensors at both ends of all the pull ropes on a platform door in real time, and marks the tension sensors at both ends of a pull rope as the same group of tension sensors;

[0084] S22: Determine whether the difference in tension values ​​of all groups of tension sensors is not greater than the preset tension difference. If yes, proceed to step S3; otherwise, issue a level one alarm.

[0085] In this invention, a connecting buckle is connected between two adjacent pull ropes, and the two ends of the connecting buckle are fixedly connected to the pull ropes.

[0086] When there is only one connecting buckle between the two ropes and it is located in the middle of the rope, when performing step S2, the preset tension difference is one-quarter of the weight of the entire rope.

[0087] The specific source is:

[0088] When the connecting buckle is located in the middle of the pull rope, if the pull rope breaks, the difference in tension between the two ends of the pull rope is minimal when the break point is to the left of the connecting buckle and infinitely close to it. At this point, the tension sensor at the connection point between the left column and the pull rope bears the entire weight of the pull rope on the left side of the connecting buckle, which is half of the total weight of the pull rope. The weight of the right half of the pull rope is shared equally between the right column and the connecting buckle, and the tension sensor at the connection point between the right column and the pull rope bears one-quarter of the pull rope's weight. The difference in tension obtained by the two tension sensors is one-quarter of the pull rope's weight. The greater the distance between the break point and the connecting buckle, the greater the difference in tension obtained by the two tension sensors.

[0089] Since there may be more than one connecting buckle and the connecting buckle may not be located in the exact center of the pull rope, the minimum tension difference obtained by the two tension sensors can be simulated when the pull rope breaks at all locations, based on the current number and position of the connecting buckles, and used as the preset tension difference value.

[0090] In this invention, step S4 is specifically performed as follows:

[0091] S41: Determine whether the time interval between the changes in the tension values ​​at both ends of the rope during displacement is not less than the preset time difference. If yes, proceed to step S42; otherwise, issue a level 2 alarm.

[0092] Since the rope is a flexible component, when one end of the rope moves, the change in force propagates along the rope in the form of a stress wave (elastic wave), with a wave velocity of c. The calculation method is as follows:

[0093] c 2 =E / ρ;

[0094] Where E is the elastic modulus and ρ is the density; then the wave velocity c = (E / ρ)0.5;

[0095] When the rope length is L, the time T for the wave to travel from one end of the rope to the other is calculated as follows:

[0096] T = L / c = L / (E / ρ) 0.5 ;

[0097] Therefore, after introducing the error, the preset time difference should be slightly greater than T. In practical applications, the preset time difference should be set to 1.25T.

[0098] In other words, when one end of the pull rope is driven to move, the tension at the displacement end of the pull rope will change instantaneously, but the tension at the end of the pull rope away from the displacement end will be delayed. If the time interval between the changes in the tension values ​​at both ends of the pull rope is less than the preset time difference, it means that the pull rope is transmitting force normally and the pull rope has not broken. Otherwise, if the changes in the tension at both ends are not synchronized, it is directly determined that the pull rope is broken and a level two alarm is issued directly.

[0099] S42: Determine whether the tension values ​​at all ends of the pull ropes are not less than the preset tension value after the displacement stops. If so, do not perform the operation; otherwise, issue a level 2 alarm.

[0100] In other words, if the tension at all ends of all the ropes is not less than the preset tension value after the displacement stops and the ropes stop swaying, then the ropes are normal; otherwise, the ropes are considered broken and a level two alarm is issued.

[0101] Finally, an alarm is installed on the column;

[0102] During step S2, a level one alarm is issued via the alarm device;

[0103] When performing step S4, a secondary alarm is issued via the alarm device.

[0104] This invention discloses a method for detecting broken ropes in a pull-rope safety gate. First, both ends of the pull rope are made completely horizontal, and then one end of the pull rope is driven to move. At the same time, the change in tension at the end of the pull rope is acquired. When the tension is abnormal, a broken rope alarm is issued to remind platform staff to eliminate the risk and prevent people from taking the opportunity to pass through the platform gate, thus ensuring a high level of safety on the platform.

[0105] Example 3, still as Figure 1 , 2 The illustration shown is only one embodiment of the present invention. Based on Embodiment 1 and / or Embodiment 2, in the rope breakage detection method of the pull rope safety door of the present invention, when performing step S3, the controller controls the motor on the column at one end of the pull rope to work, driving the pull rope to move upward or downward by a preset distance value.

[0106] When executing step S4, the preset tension value is the tension value at the end of the rope with the lower height when the maximum preset safety error displacement value is reached. Considering the weight of the rope, the tension value at the end with the lower height is smaller. Therefore, the tension values ​​at both ends of the rope are not less than the preset tension value.

[0107] Example 4, still as Figure 1 , 2 The illustration shown is merely one embodiment of the present invention. Based on Embodiment 1 and / or Embodiment 2, and differing from Embodiment 3, in the present invention's method for detecting broken ropes in a pull-rope safety gate, a horizontal telescopic rod connected to a slider is provided on the column. The horizontal telescopic rod extends horizontally and is perpendicular to the original extension direction of the pull rope. Since the original extension direction of the pull rope is parallel to the extension direction of the train track, the horizontal telescopic rod is perpendicular to the extension direction of the train track and extends horizontally. When executing step S3, the controller controls the extension and retraction of the horizontal telescopic rod, causing one end of the pull rope to move a preset distance value toward or away from the edge of the platform.

[0108] The distance between the two pillars is L, and the preset distance is M. From a top-down view, the lengths of L and M extend perpendicularly. After one end of the rope shifts, the distance between the two ends of the rope is N. L, M, and N form a right triangle, with N located exactly on the hypotenuse. Then, the length of the distance N between the two ends of the rope is (L... 2 +M 2 ) 0.5 The length of the rope is (L) 2 +M 2 ) 0.5 -L.

[0109] When executing step S4, the preset tension value is the smaller of the tension values ​​at both ends of the rope when one end of the rope moves horizontally perpendicular to the direction of rope extension, which is the maximum preset safety error displacement value.

[0110] It should be noted that in Example 3, the vertical displacement of one end of the pull rope results in the same elongation variable as in Example 4, which is (L). 2 +M 2 ) 0.5 -L.

[0111] Example 5, still as Figure 1 , 2As shown, this is only one embodiment of the present invention. Based on Embodiment 1 and / or Embodiment 2, and different from Embodiments 3 and 4, in the rope breakage detection method of the pull rope safety door of the present invention, a tension adjustment block and a slide groove for facilitating the sliding of the tension adjustment block are provided on the slider. The slide groove is in the same direction as the extension of the pull rope. When executing step S3, the controller controls the tension adjustment block to slide along the slide groove, causing one end of the pull rope to move away from the other end by a preset distance value.

[0112] The distance between the two pillars is L, and the preset distance is M. After one end of the rope is displaced, the distance between the two ends of the rope is (L+M).

[0113] When executing step S4, the preset tension value is the smaller of the tension values ​​at both ends of the rope when the displacement of one end of the rope stretches the rope to the maximum preset safety error displacement value.

[0114] Of course, in Embodiment 3, one end of the pull rope is displaced vertically; in Embodiment 4, it is displaced horizontally perpendicular to the original extension direction of the pull rope (the extension direction of the train track); and in Embodiment 5, one end of the pull rope is displaced to lengthen the pull rope. These three embodiments are equivalent to the X-axis, Y-axis, and Z-axis in a three-dimensional coordinate system. However, the present invention is not necessarily limited to displacement in one of the three axial directions. It can be tilted, for example, one end of the pull rope is tilted upward at a 45-degree angle to the horizontal extension direction. That is, there are many different displacement directions. As long as the pull rope is stretched appropriately, any of these are possible.

[0115] Example 6: This application also provides an apparatus, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor is installed on an existing platform door and executes the computer program, it implements a rope breakage detection method for a pull-rope safety door according to any one of Examples 1 to 5.

[0116] Example 7: This application provides a computer storage medium storing a computer program, which includes program instructions. When executed by a processor, the program instructions can implement a rope breakage detection method for a pull-rope safety door in any of the embodiments 1 to 5.

[0117] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0118] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0119] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some service interface; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0120] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0121] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0122] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned memory includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0123] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, which may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0124] The foregoing description is merely an exemplary embodiment of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure. Those skilled in the art will readily conceive of embodiments of this disclosure upon considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described herein. The specification and embodiments are to be considered exemplary only, and the scope and spirit of this disclosure are defined by the claims.

Claims

1. A method for detecting broken ropes in a pull-rope safety gate, and a structure for detecting broken ropes in a pull-rope safety gate, the structure comprising a plurality of columns installed on a platform and a platform gate formed by a liftable pull rope installed between two adjacent columns; Its features are, The method includes the following steps: S1: Drive the pull rope to raise and lower so that the two ends of the pull rope are at the same height; S2: Determine whether the difference in tension between the two ends of the pull rope is less than the preset tension difference; if so, proceed to step S3; otherwise, issue a level one alarm. S3: Only drive one end of the pull rope to move a preset distance value; S4: Determine whether the tension values ​​at both ends of the pull rope are not less than the preset tension value; if so, do not perform the operation; otherwise, issue a level 2 alarm.

2. The method for detecting rope breakage in a pull-rope safety gate according to claim 1, characterized in that: The platform gate's uprights are equipped with sliders for connecting to the end of the pull rope and motors for driving the sliders to slide, and a controller is also provided on the uprights. When performing step S1, an electrical connection is established between the controllers on the columns at both ends of the platform door, and the lifting stroke position of the two sliders at both ends of the pull rope is obtained in real time. The controller controls the motor to rotate, so that the sliders at both ends of the pull rope have the same stroke position, thereby making the two ends of the pull rope the same height.

3. The method for detecting rope breakage in a pull-rope safety gate according to claim 2, characterized in that: The slider is equipped with a tension sensor for connection with the pull rope; the tension sensor is electrically connected to the controller; During steps S2 and S4, the controller obtains the tension value at the end of the pull rope through the tension sensor.

4. The method for detecting rope breakage in a pull-rope safety gate according to claim 1, characterized in that: Before performing step S2, a preset tension difference is generated based on the length and material of the pull rope; Before performing step S4, a preset tension value is generated based on the length and material of the pull rope.

5. The method for detecting rope breakage in a pull-rope safety gate according to claim 3, characterized in that: The number of pull ropes is at least two; When performing step S2, the specific steps are as follows: S21: The controller acquires the readings of the tension sensors at both ends of all the pull ropes on a platform door in real time, and marks the tension sensors at both ends of a pull rope as the same group of tension sensors; S22: Determine whether the difference in tension values ​​of all groups of tension sensors is less than the preset tension difference. If so, proceed to step S3; otherwise, issue a level one alarm.

6. The method for detecting rope breakage in a pull-rope safety gate according to claim 5, characterized in that: A connecting buckle connects two adjacent pull ropes; When performing step S2, the preset tension difference is one-quarter of the weight of the entire rope.

7. The method for detecting rope breakage in a pull-rope safety gate according to claim 1, characterized in that: Before executing step S3, a preset distance value is generated; Furthermore, the preset distance value is not less than the maximum preset safety error displacement value.

8. The method for detecting rope breakage in a pull-rope safety gate according to claim 7, characterized in that: When performing step S4, the preset tension value is the tension value at the end of the rope with the lower height when the maximum preset safety error displacement value of the rope end displacement is reached.

9. The method for detecting rope breakage in a pull-rope safety gate according to claim 5, characterized in that, When performing step S4, the specific steps are as follows: S41: Determine whether the time interval between the changes in the tension values ​​at both ends of the rope is not less than the preset time difference. If yes, proceed to step S42; otherwise, issue a level 2 alarm. S42: Determine whether the tension value at all ends of the pull rope is not less than the preset tension value. If so, do not perform the operation; otherwise, issue a level 2 alarm.

10. A method for detecting rope breakage in a pull-rope safety gate according to claim 8, characterized in that: An alarm is installed on the column; During step S2, a level one alarm is issued via the alarm device; When performing step S4, a secondary alarm is issued via the alarm device.

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