Method for monitoring and maintaining metro platform screen door

Abstract

The invention discloses a method for detecting and maintaining a metro platform screen door, which comprises the following steps: monitoring the metro platform screen door, including real-time monitoring and conventional monitoring; importing a conversion value table of voltage of each point of the metro platform screen door in a normal time sequence state; voltage data of the metro platform screen door are obtained, the voltage data comprise real-time voltage data and historical voltage data, and the voltage data of the metro platform screen door are obtained in the process of monitoring the metro platform screen door; comparing the voltage data with the conversion value table, and sending an alarm signal to a point location with abnormal voltage; and issuing an alarm signal, performing maintenance in response to the alarm signal, and performing real-time monitoring on the metro platform screen door again after the maintenance is completed. According to the invention, the signal and the shielding door interface are monitored, fault judgment is carried out on accidental and instantaneous faults with unknown reasons, a means is provided for finding potential faults in advance, and the operation and maintenance cost is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of subway operation and maintenance, and particularly to a method for monitoring and repairing subway platform screen doors. Background Art

[0002] With the rapid development of modern industry and transportation systems, the application of platform screen doors (or safety doors) has become increasingly common in places such as factories, subway stations, and airports. During subway operation, platform screen doors can provide a physical barrier to ensure the safety of passengers within a specific area and can be integrated with an automatic control system.

[0003] However, once a platform screen door fails, it will pose a great potential safety hazard to passengers. Moreover, since most failures are instantaneous failures, both the signal and platform screen door (safety door) manufacturers only have status data or partial module data, and neither can directly determine whether the failure is on the signal side or the platform screen door side. Therefore, operation and maintenance personnel cannot respond quickly to the failure, affecting the normal operation of the subway system.

[0004] The prior art monitors faulty platform screen doors by purchasing and installing real-time voltage detection devices, but the devices are expensive and cannot be deployed throughout the station. And since multiple points need to be monitored at a single signal and platform screen door interface, the deployed real-time voltage monitoring devices cannot meet the requirements of multi-point synchronous recording and display. Furthermore, due to their large volume, the transportation costs of real-time voltage detection devices are relatively high. Therefore, subway operation and maintenance personnel cannot quickly solve platform screen door failures. Summary of the Invention

[0005] To solve the above problems, the purpose of the present application is to provide a method for detecting and repairing platform screen door failures quickly.

[0006] The embodiments of the present application provide a method for detecting and repairing subway platform screen doors, including:

[0007] Monitoring subway platform screen doors, where the monitoring includes real-time monitoring and regular monitoring;

[0008] Importing a conversion value table of voltages at each point in the normal timing state of the subway platform screen door;

[0009] Obtaining subway platform screen door voltage data, where the voltage data includes real-time voltage data and historical voltage data, and the subway platform screen door voltage data is obtained during the process of monitoring the subway platform screen doors;

[0010] Comparing the voltage data with the conversion value table and sending an alarm signal for points with abnormal voltages;

[0011] Issuing an alarm signal and responding to the alarm signal for repair, and then performing real-time monitoring on the subway platform screen doors again after the repair is completed.

[0012] Further, for the method of detecting and maintaining the subway platform screen door, the real-time monitoring includes:

[0013] Configuring a monitoring environment for the subway platform screen door with anomalies. The monitoring environment includes installing a signal conversion module and configuring a database. The signal conversion module converts the voltage signal of the subway platform screen door into a real-time digital signal;

[0014] Storing the real-time digital signal as real-time voltage data through the database.

[0015] Further, for the method of detecting and maintaining the subway platform screen door, the regular monitoring includes:

[0016] Configuring a monitoring environment for the subway platform screen door with frequent problems. The monitoring environment includes installing a signal conversion module and configuring a database. The signal conversion module converts the voltage signal of the subway platform screen door into a historical digital signal;

[0017] Storing the historical digital signal as historical voltage data through the database.

[0018] Further, for the method of detecting and maintaining the subway platform screen door, the signal conversion module is an A / D voltage conversion module.

[0019] Further, for the method of detecting and maintaining the subway platform screen door, the database is a SQLite database.

[0020] Further, for the method of detecting and maintaining the subway platform screen door, the signal conversion module is connected to the subway platform screen door through an RS485 interface.

[0021] Further, for the method of detecting and maintaining the subway platform screen door, the normal timing states include the train not approaching the station, the train approaching and stopping steadily, the train closing the door and the stop timing being greater than 6 seconds, the train closing the door and the stop countdown being less than 6 seconds, and the train leaving the platform.

[0022] Further, for the method of detecting and maintaining the subway platform screen door, the voltages at each point include the signal output voltage, the platform screen door output voltage, the platform screen door enable output voltage, the platform screen door opening command voltage, the platform screen door closing command voltage, the platform screen door status voltage, and the interlock contact status voltage.

[0023] Further, for the method of detecting and maintaining the subway platform screen door, the maintenance in response to an alarm signal includes:

[0024] Repairing the points with abnormal voltages;

[0025] After the repair is completed, performing real-time monitoring on the subway platform screen door again;

[0026] Obtain the real-time voltage data and compare the real-time voltage data with the numerical table. If the voltage at each point is abnormal, repair it again; otherwise, end the repair.

[0027] The technical solution provided by the embodiment of the present application has the following advantages:

[0028] 1. It can detect the faults of the platform screen door in time and has a fast response for emergency repair;

[0029] 2. It is easy to operate and can effectively reduce the probability of subway operation delay;

[0030] 3. Monitor the interface between the signal and the platform screen door (safety door), judge the faults caused by occasional and instantaneous reasons that are unknown, provide means for early detection of potential faults, and effectively reduce the operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a flowchart of the method for detecting and repairing the platform screen door preferably in the embodiment of the present invention;

[0032] Figure 2 It is a schematic diagram of a specific application example of the method for monitoring and repairing the platform screen door preferably in the embodiment of the present invention;

[0033] Figure 3 It is a flowchart of the operation of a specific application example of the method for monitoring and repairing the platform screen door preferably in the embodiment of the present invention;

[0034] Figure 4 It is a configuration interface diagram of the platform screen door data monitoring system for a specific application example of the method for monitoring and repairing the platform screen door preferably in the embodiment of the present invention;

[0035] Figure 5 It is a real-time display interface diagram of the voltage at the platform screen door points of the platform screen door data monitoring system for a specific application example of the method for monitoring and repairing the platform screen door preferably in the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] To make the purpose, technical solution and advantages of the implementation of the present application clearer, the technical solution in the embodiment of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0037] In addition, it should be noted that, unless otherwise clearly specified and limited, the similar terms such as "installation", "connection", and "linkage" used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can also be the communication inside two components. Those skilled in the art can understand its specific meaning in this application according to the specific situation.

[0038] Figure 1 This is a flowchart of the method for detecting and maintaining the subway platform screen door preferred in the embodiments of the present invention. As Figure 1 shown, the method for detecting and maintaining the subway platform screen door includes:

[0039] S1) Monitoring the subway platform screen door, and the monitoring includes real-time monitoring and routine monitoring;

[0040] S2) Importing the conversion value table of the voltages at each point in the normal timing state of the subway platform screen door;

[0041] S3) Obtaining the voltage data of the subway platform screen door, where the voltage data includes real-time voltage data and historical voltage data, and the voltage data of the subway platform screen door is obtained during the process of monitoring the subway platform screen door;

[0042] S4) Comparing the voltage data with the conversion value table and sending an alarm signal to the points with abnormal voltages;

[0043] S5) Sending out the alarm signal and performing maintenance in response to the alarm signal, and then performing real-time monitoring on the subway platform screen door again after the maintenance is completed.

[0044] Among them, in step S1) for monitoring the subway platform screen door, the monitoring includes real-time monitoring and routine monitoring.

[0045] Specifically, the real-time monitoring further includes:

[0046] Configuring a monitoring environment for the subway platform screen door with abnormalities, where the monitoring environment includes installing a signal conversion module and configuring a database, and the signal conversion module converts the voltage signal of the subway platform screen door into a real-time digital signal;

[0047] Storing the real-time digital signal as real-time voltage data through the database.

[0048] Real-time monitoring is mostly used to monitor the subway platform screen door with abnormalities, helping the operation and maintenance emergency repair personnel to better complete the emergency repair work.

[0049] Specifically, the routine monitoring includes:

[0050] For the monitoring environment configured for the subway platform screen doors with frequent problems, the monitoring environment includes installing a signal conversion module and configuring a database. The signal conversion module converts the voltage signal of the subway platform screen door into a historical digital signal;

[0051] The historical digital signal is stored as historical voltage data through the database.

[0052] Conventional monitoring is mostly used for monitoring subway platform screen doors with frequent problems. When conventional monitoring is configured on subway platform screen doors with frequent problems, once a problem occurs with the screen door, a rapid response can be made, increasing the safety of subway operation.

[0053] Preferably, the signal conversion module is an A / D voltage conversion module.

[0054] Preferably, the database is an SQLite database.

[0055] Preferably, the signal conversion module is connected to the subway platform screen door through an RS485 interface.

[0056] Step S2) Import the conversion value table of the voltages at each point in the normal timing state of the subway platform screen door;

[0057] Specifically, the normal timing state includes the train not approaching the station, the train approaching and stopping steadily, the train closing the door and the stop timing being greater than 6 seconds, the train closing the door and the stop countdown being less than 6 seconds, and the train leaving the platform.

[0058] Specifically, the voltages at each point include the signal output voltage, the platform screen door output voltage, the platform screen door enable output voltage, the platform screen door opening command voltage, the platform screen door closing command voltage, the platform screen door status voltage, and the interlock contact status voltage.

[0059] Preferably, the A / D voltage conversion module includes 8 voltage acquisition points. Through analog-to-digital conversion, multi-channel voltage acquisition and conversion are performed in each state, and 0 and 1 values are directly output. The value 0 indicates no voltage (disconnected), and the value 1 indicates voltage. Through the acquisition device for acquisition and conversion, the corresponding point value is 0 or 1. The conversion values of the voltages at the points in the normal timing state of the platform screen door in the normal state are shown in the following table:

[0060]

[0061] Step S3) Obtain the voltage data of the subway platform screen door. The voltage data includes real-time voltage data and historical voltage data, and the voltage data of the subway platform screen door is obtained during the process of monitoring the subway platform screen door.

[0062] Real-time voltage data and historical voltage data are obtained through the monitoring of the subway platform screen doors. The real-time voltage data can be viewed as real-time information to know the voltage at each point of the current platform screen doors. The historical voltage data can be viewed as historical information to obtain the historical voltage information of the voltage at each point of the platform screen doors.

[0063] Step S4) Compare the voltage data with the conversion value table and send an alarm signal to the point with abnormal voltage.

[0064] By comparing with the voltage conversion value table of the normal timing state points, find the points with problems and repair and overhaul these points.

[0065] Step S5) Send out an alarm signal and perform maintenance in response to the alarm signal, and then perform real-time monitoring on the subway platform screen doors again after the maintenance is completed.

[0066] Specifically, the maintenance further includes:

[0067] Repair the points with abnormal voltage;

[0068] Perform real-time monitoring on the subway platform screen doors again after the maintenance is completed;

[0069] Obtain the real-time voltage data and compare the real-time voltage data with the value table. If the voltage at each point is abnormal, repair again; otherwise, end the repair.

[0070] Figure 2 FIG. is a schematic diagram of a specific application example of the method for monitoring and maintaining the subway platform screen doors preferably used in the embodiments of the present invention. As Figure 2 shown, the lightweight database and the operating software are separately deployed, and the operating environment can be built on any computer equipped with an operating system, such as a Windows system computer. A portable storage device 201 can be carried, preferably a USB flash drive. The storage device 201 is pre-installed with a C / S program based on C# with an SQLite database 203 and a C / S program 202 based on.NET. A Windows system laptop computer 301 has been deployed. A RS485A / D voltage acquisition module 401 for supporting the voltage acquisition device is provided. This module has a TCP transmission protocol packet, and the required interfaces are independently developed. The repair and maintenance personnel 101 can carry the storage device 201 to deploy the system into the Windows system laptop computer 301 and perform repair and emergency repair tasks on the platform screen doors through the RS485A / D voltage acquisition module 401 for supporting the voltage acquisition device.

[0071] The storage device 201 is equipped with a C / S program based on C# with the SQLite database 203 and a C / S program 202 based on.NET, including a C / S program developed in C# and the SQLite database. This software includes three basic functions: permission setting, which assigns permissions to managers and ordinary staff; emergency repair and maintenance. The emergency repair and maintenance mode: the emergency repair mode means that during the operation time, the platform screen door repair work is completed as quickly as possible; the maintenance refers to the repair and maintenance of the platform screen door at a certain cycle or specified time outside the operation time; routine monitoring, which conducts daily monitoring on the voltage data of the platform screen door points of the problem stations. Correspondingly, for permission setting, there are three types of permissions: super administrator permission, which is mainly used to view the functions of various permissions, does not perform any operations, does not edit personnel permissions, and does not write the detection data into the database; general administrator permission, which can modify the password for general permissions, review the voltage data reports of the operators, and include operations on the operator permissions such as viewing real-time information, reading the current point voltage data, saving the current voltage data to the database, viewing the voltages of each point of the current platform screen door, viewing historical information, and exporting historical information.

[0072] Both routine monitoring and emergency repair and maintenance include: real-time information query and historical information query, correspondingly including generating real-time information charts. The charts use Gantt charts to directly display the voltage of the platform screen door points in real time, forming statistical information charts. The statistical data can be queried, displayed, and the corresponding files can be exported according to time conditions or station conditions. For routine monitoring, long-term monitoring is carried out on the platform screen doors of stations with frequent failures. Its software function module is the same as that of emergency repair and maintenance. The only difference is that the hardware module needs to be permanently installed at the voltage monitoring interface of the monitored platform screen door point, and the program automatically records the data and stores it in the database.

[0073] The program of the Windows system laptop 301 and the interface device: This software part is developed in C# under the.net platform for a C / S program, with functions of interface display and high-speed data reading and writing. The interface device can be connected to the RS485 A / D voltage acquisition module 401. Among them, the RS485 A / D voltage acquisition module 401 includes 8 voltage acquisition points. Through analog-to-digital conversion, multiplexed voltage acquisition and conversion are carried out in each state, and 0 and 1 values are directly output. The value 0 indicates no voltage and the value 1 indicates voltage.

[0074] Figure 3 It is a flowchart of the operation of a specific application example of the method for monitoring and maintaining the subway platform screen door preferably used in the embodiment of the present invention. As Figure 3 shown, the whole process is divided into two categories:

[0075] The first category is the emergency repair and maintenance task. This task goes from step S1 to step S10, and is

[0076] S1 -> S2 -> S3 -> S4 -> S5 -> S6 -> S7 -> S8 -> S9 -> S10,

[0077] The second category is regular monitoring tasks. This task goes from step S11 to step S10, and is

[0078] S11 -> S4 -> S5 -> S6 -> S7 -> S8 -> S9 -> S10,

[0079] The following will elaborate on the entire process from two aspects:

[0080] In the first category of emergency repair and maintenance tasks:

[0081] S1: Environment configuration,

[0082] 1. Connect the interface on the platform screen door to the RS485 A / D voltage acquisition module 401.

[0083] 2. Connect the data acquisition and conversion module to the PC and configure the Windows environment.

[0084] S2: Task assignment

[0085] Assign staff to perform the emergency repair and maintenance tasks of the platform screen door.

[0086] S3: Emergency repair and maintenance personnel, task assignment

[0087] The employee carries the storage device 201 to the accident site for operation. The storage device 201 is pre - installed with a C / S program based on the SQLite database 203 and a C / S program based on.NET 202. Insert the portable storage device 201 into the USB port of the PC.

[0088] S4: Software and hardware settings

[0089] Figure 4 This is the configuration interface diagram of the platform screen door data monitoring system, which is a specific application example of the preferred method for monitoring and maintaining the platform screen door in the embodiments of the present invention. As Figure 4 shown, each point of the platform screen door can be custom - named. Bind the RS485 serial port and the A / D module, and set the relevant hardware bindings such as the bound COM port, baud rate, parity bit, format bit, data format, etc.

[0090] S5: Determine whether the software and hardware are successfully debugged

[0091] After the hardware connection is completed, start the software and perform read and write tests. If the tests pass, read and display the normal signals of the stations to be detected and write them into the database. If the connection is successful, the "Connection Successful" field will be returned on the software display interface, indicating that the software and hardware are well connected. If there are red warning fields on the display interface during the software and hardware debugging, the connection needs to be re-debugged.

[0092] S6: Software business implementation

[0093] After the software and hardware debugging is completed, if it is the first type of emergency repair and maintenance task, select the "Real-time Information Detection" function.

[0094] S7: Result display

[0095] Figure 5 This is the real-time display interface diagram of the voltage at the shielding door points of the shielding door data monitoring system, which is a specific application example of the monitoring and maintenance method of the subway shielding door preferred in the embodiment of the present invention. As Figure 5 shown, according to the selected service, the software interface directly generates a simulation diagram of the corresponding points of the shielding door. On this diagram, the "Powered" and "Powerless" indicators are directly displayed for the point voltages. The powered state uses green as the background color, and the powerless state uses red as the background color.

[0096] S8: Perform emergency repair and maintenance according to the results

[0097] Compare with the normal point voltage to find the points with problems and perform emergency repair and maintenance on these points.

[0098] S9: Check whether the points are normal

[0099] After the emergency repair and maintenance work is completed, use the software to detect again to check whether the point voltage is normal. If it is normal, proceed to the next step. If the voltage is abnormal, perform emergency repair and maintenance again.

[0100] S10: Save the results and exit

[0101] After the emergency repair and maintenance is completed, save the data of this time and exit the software.

[0102] In the second type of emergency repair and maintenance task:

[0103] S11: Routine monitoring

[0104] This task is mainly for the shielding doors of stations with frequent problems for daily monitoring. After connecting the storage device 201 (pre-installed with a C / S program with an SQLite database 203 and a.NET-based C / S program 202) to the PC and the RS485 A / D voltage acquisition module 401, perform routine monitoring on the shielding doors with frequent problems.

[0105] S4: The software and hardware settings are similar to those of the first type.

[0106] S5: The successful operation judgment of software and hardware debugging is similar to the first category.

[0107] S6: In software implementation business, select real-time monitoring, record data, and at the same time

[0108] S7: The result display allows querying of real-time data, similar to the first category of emergency repair and maintenance, and historical data can also be displayed. The historical data is displayed in the form of a Gantt chart and can also be directly exported as an excel report.

[0109] S8: Perform emergency repair and maintenance according to the result. This function can lock the voltage point through historical information query or real-time information query;

[0110] S9: Perform emergency repair and maintenance according to the result, and the operation is similar to the first category;

[0111] S10: Save the result and exit, and the operation is similar to the first category.

[0112] This specific application example combines the characteristics of subway emergency repair and maintenance monitoring, adopts a split design, uses a portable storage device to store the C / S software and database, uses A / D to collect the voltage of the full circuit of the platform screen door, and reads, stores, calculates, and displays data in the windows environment to form a set of efficient and accurate operation systems. It reduces the burden on enterprises. Only an additional voltage collector needs to be purchased, with a unit price within 1000 yuan. Compared with purchasing 100,000 yuan of monitoring equipment, each set of equipment reduces the enterprise burden by 99,000 yuan.

[0113] The method for detecting and repairing subway platform screen doors using the present invention has the following advantages:

[0114] 1. Can promptly detect platform screen door failures and has a fast response for emergency repair;

[0115] 2. Easy to operate, can effectively reduce the probability of subway operation delays;

[0116] 3. Monitor the interface between the signal and the platform screen door (safety door), make fault judgments on occasional and instantaneous faults of unknown causes, provide means for early detection of potential faults, and effectively reduce the operation and maintenance costs.

[0117] It should be noted that Figure 4 and Figure 5 are screenshots of the actual use interface of the software. The main purpose is to help understand the method for detecting and repairing subway platform screen doors of the present invention, will not affect the understanding and description of the present invention, has no direct association with the method process of the present invention, and is just a result. Using actual screenshots can more clearly describe the core idea of the preferred embodiment of the present invention.

[0118] Those skilled in the art will appreciate that information, signals, and data can be represented using any of a variety of different technologies and techniques. For example, the data, instructions, commands, information, signals, bits, symbols, and chips described throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0119] Those skilled in the art will further appreciate that the various illustrative logical blocks, modules, circuits, and algorithmic steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or a combination of both. To clearly illustrate this interchangeability of hardware and software, the various illustrative components, blocks, modules, circuits, and steps are described above in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and the design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of this application.

[0120] The various illustrative logical modules and circuits described in connection with the embodiments disclosed herein can be implemented using a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gates or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0121] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of both. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read from, and write to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.

[0122] In one or more exemplary embodiments, the described functionality may be implemented in hardware, software, firmware, or any combination thereof. If implemented as a computer program product in software, the functions may be stored on or transmitted via a computer-readable medium as one or more instructions or code. The computer-readable medium includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. The storage media may be any available media that can be accessed by a computer. By way of example and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a web site, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of the medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, where disks typically reproduce data magnetically, while discs reproduce data optically with a laser. Combinations of the above should also be included within the scope of computer-readable media.

[0123] The above embodiments are provided for those skilled in the art to implement or use the present application. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the application idea of the present application. Therefore, the protection scope of the present application is not limited by the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. A method for detecting and maintaining a subway platform door, characterized in that: include: Monitoring subway platform doors, including real-time monitoring and routine monitoring; Import the conversion value table of voltage at each point of the normal timing state of the subway screen door; Acquire subway screen door voltage data, the voltage data includes real-time voltage data and historical voltage data, and the subway screen door voltage data is acquired during the process of monitoring the subway screen door; Comparing the voltage data with the conversion value table and sending an alarm signal to the point where the voltage is abnormal; An alarm signal is sent down and maintenance is performed in response to the alarm signal, and after the maintenance is completed, the subway platform screen door is again monitored in real time.

2. The method for detecting and maintaining a subway platform screen door according to claim 1, characterized in that: The real-time monitoring includes: A monitoring environment is configured for the subway platform screen door that has an abnormality, wherein the monitoring environment includes installing a signal conversion module and configuring a database, wherein the signal conversion module converts the voltage signal of the subway platform screen door into a real-time digital signal; The real-time digital signal is stored as real-time voltage data through the database.

3. The method for detecting and maintaining a subway platform screen door according to claim 1, characterized in that: The routine monitoring includes: A monitoring environment is configured for the subway platform screen door with frequent problems, wherein the monitoring environment includes installing a signal conversion module and configuring a database, wherein the signal conversion module converts the voltage signal of the subway platform screen door into a historical digital signal; The historical digital signal is stored as historical voltage data through the database.

4. The method for detecting and maintaining a subway platform screen door according to claim 2 or 3, characterized in that: The signal conversion module is an A / D voltage conversion module.

5. The method for detecting and maintaining a subway platform screen door according to claim 2 or 3, characterized in that: The database is a SQLite database.

6. The method for detecting and maintaining a subway platform screen door according to claim 2 or 3, characterized in that: The signal conversion module is connected to the subway screen door via an RS485 interface.

7. The method for detecting and maintaining a subway platform screen door according to claim 1, characterized in that: The normal timing status includes the train not entering the station, the train entering the station and stopping steadily, the train closing its doors and the stop countdown is greater than 6 seconds, the train closing its doors and the stop countdown is less than 6 seconds, and the train leaving the platform.

8. The method for detecting and maintaining a subway platform screen door according to claim 1, characterized in that: The voltages at each point include a signal output voltage, a shield door output voltage, a shield door enable output voltage, a shield door open command voltage, a shield door close command voltage, a shield door state voltage and an interlock contact state voltage.

9. The method for detecting and maintaining a subway platform screen door according to claim 1, characterized in that: Repairs performed in response to an alarm signal include: Repair points with abnormal voltage; After the maintenance is completed, the subway platform screen door is again monitored in real time; The real-time voltage data is obtained and compared with the value table. If the voltage at each point is abnormal, maintenance is performed again; otherwise, maintenance is terminated.

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