KR102529926B1 - Method and system of diagnosing defect and calculating remaining life of door of railway vehicle - Google Patents

Abstract

A method and apparatus for diagnosing a defect in a door of a railroad car and calculating the remaining service life are disclosed. The method may include setting a state value for diagnosis of a door; Building a database of indexes for door diagnosis; comparing the detected index with a reference index; And if the detected index is greater than the reference index in the database, the step of storing the fault code of the door, and the step of building the database of the index for diagnosis of the door is a drive that operates the door during one period of closing after the door is opened. measuring the current applied to the motor; storing, as a state value, an integral value of m square of the current applied to the driving motor in a specific time domain within the one period; And processing the state value to calculate an index and a reference index. Here, m is an integer greater than or equal to 1.

Description

Method and apparatus for diagnosing defects in doors of railroad cars and calculating remaining life

The present invention relates to a method and apparatus for diagnosing a defect in a door of a railroad car and calculating the remaining service life, and measures and analyzes a current waveform of a driving motor that opens or closes a door to diagnose a defect in a door of a railroad car and calculates a door defect. It relates to a method and device for calculating the remaining life of

Currently, parts used in railway vehicles are periodically diagnosed, and when abnormalities are found during diagnosis, repair or replacement is performed. However, since the railway system is a mass transportation system, operation becomes impossible when a failure occurs in a door, which is a major device of the railway system. In the state where the door is not closed, it is impossible to operate the railroad car due to concerns about accidents, and when the door is not opened, it may cause great inconvenience to passengers getting on/off. In particular, in the case of the subway, frequent door operation is required, and since the normal operation of the door is often disturbed by passengers, the possibility of unexpected failure is very high, so the door of a railway vehicle is subject to continuous monitoring.

Door defects mostly occur in drive motors, reducers, and mechanical devices. Since defects in the reducer and mechanical devices eventually act as a load on the drive motor, it is possible to analyze the current waveform of the drive motor and detect state values necessary for diagnosis therefrom.

However, in order to use a diagnosis method using a current waveform, it is necessary to collect as much data as possible by setting a data sampling time as short as possible. In general, a current waveform is irregularly mixed with a lot of noise, and it is very difficult to accurately diagnose a defect using the irregular current waveform mixed with noise.

Matters described in this background art section are prepared to enhance understanding of the background of the invention, and may include matters that are not prior art already known to those skilled in the art to which this technique belongs.

An embodiment of the present invention is to provide a method and apparatus for diagnosing a defect in a door of a railway vehicle and calculating the remaining life by measuring and analyzing a current waveform of a driving motor that opens or closes a door.

In addition, another embodiment of the present invention provides a method and apparatus for accurately diagnosing a defect in a door of a railroad car and calculating the remaining life by removing noise by smoothing a current waveform and analyzing the current waveform from which the noise has been removed. want to provide

Furthermore, another embodiment of the present invention can quickly and accurately diagnose a door failure by using a state value related to the door's operating performance when the door is operated for one cycle, and can optimize the required amount of data and required memory resources. It is intended to provide a method and device for diagnosing defects in a door of a railway vehicle capable of preventing an increase and calculating the remaining life.

A method for diagnosing a defect in a door of a railroad car and calculating a remaining service life according to an embodiment of the present invention includes setting a state value for door diagnosis; Building a database of indexes for door diagnosis; comparing the detected index with a reference index; And if the detected index is greater than the reference index in the database, the step of storing the fault code of the door, and the step of building the database of the index for diagnosis of the door is a drive that operates the door during one period of closing after the door is opened. measuring the current applied to the motor; storing, as a state value, an integral value of m square of the current applied to the driving motor in a specific time domain within the one period; And processing the state value to calculate an index and a reference index. Here, m is an integer greater than or equal to 1.

The specific time period within the one period includes two door release sections in which the mechanical locking mechanism of the door is released, two door operating sections in which the door is actually opened or closed, two door locking sections in which the mechanical locking mechanism of the door is locked, It may be one or a combination of two first transition sections between the door unlocking section and the door operating section and two second transition sections between the door operating section and the door locking section.

In one aspect, the state value is the integration of the m square of the current applied to the drive motor during the door release period, the first transition period, the door operation period, the second transition period, and the door lock period when the door is opened. can be a value

In another aspect, the state value is for the time of m square of the current applied to the drive motor during the door release period, the first transition period, the door operation period, the second transition period, and the door lock period when the door is closed. It may be an integral value.

The database includes a buffer database in which the state values are stored and a diagnostic database in which indexes and reference indexes are stored, the maximum number of state values that can be stored in the buffer database is set, and the state values stored in the buffer database are the number of state values. It can be stored in the buffer database until it reaches the set maximum number of state values.

If the number of state values stored in the buffer database is greater than or equal to the maximum number of state values, the state values in the buffer database may be transferred to the diagnosis database and the state values in the buffer database may be deleted.

When the state values are transferred to the diagnostic database, indexes and reference indexes may be calculated by processing the state values in the diagnostic database.

Indexes and reference indexes may be updated until the number of state values stored in the diagnostic database reaches the set number.

If the number of state values stored in the diagnostic database is greater than or equal to a set number, updating of indexes and reference indexes may be prohibited.

The step of storing, as a state value, an integral value of m square of the current applied to the drive motor in a specific time domain within the one period as a state value may further include smoothing the measured current.

The index may be the state value, an average or standard deviation of the state value, and the reference index may be a value obtained by applying a set factor to the index.

The method for diagnosing a defect in a door of a railway vehicle and calculating the remaining lifespan further includes calculating the remaining lifespan of the door, and the calculating the remaining lifespan of the door includes estimating a current usage amount according to an index; And calculating the remaining life of the door based on the current usage amount and the target usage amount.

Calculating the remaining life of the door may further include notifying the calculated remaining life.

If the reference index does not exist in the diagnostic database, the step of comparing the detected index with the reference index may not be performed.

According to another embodiment of the present invention, an apparatus for diagnosing a defect in a door of a railroad car and calculating a remaining service life includes a data detector for measuring data including a state value for diagnosis of a door; And a controller configured to diagnose a door failure and calculate a remaining service life by using the data detected by the data detector, wherein the controller diagnoses a door defect of a railroad car according to an embodiment of the present invention and calculates a remaining service life. It may be configured to implement a method for calculating .

According to an embodiment of the present invention, a defect in a door of a railway vehicle can be accurately diagnosed by removing noise by smoothing a current waveform and analyzing the current waveform from which the noise has been removed.

In addition, when the door is operated for one cycle, door failures can be quickly and accurately diagnosed using state values related to the door's operational performance, and an increase in the amount of data and memory resources required for diagnosis can be prevented. there is.

In addition, when the number of state values stored in the buffer database reaches the maximum number of state values, the state values stored in the buffer database are transferred to the diagnosis database and the state values of the corresponding class in the buffer database are deleted, thereby reducing the cost of memory resources in the buffer database. increase can be prevented.

In addition, since the state values transferred to the diagnosis database are also stored in the form of an average, variance, or standard deviation, an increase in memory resources of the diagnosis database can be prevented.

In addition, if the number of state values stored in the diagnostic database is greater than or equal to the set number, updating of indexes and reference indexes is prohibited, thereby further preventing an increase in memory resources of the diagnostic database.

In addition, since the remaining life of the door can be accurately predicted based on the trend of the index, the time of replacement or repair can be accurately determined.

In addition, effects that can be obtained or predicted due to the embodiments of the present invention will be directly or implicitly disclosed in the detailed description of the embodiments of the present invention. That is, various effects expected according to an embodiment of the present invention will be disclosed within the detailed description to be described later.

Embodiments herein may be better understood with reference to the following description in conjunction with the accompanying drawings in which like reference numbers indicate the same or functionally similar elements.
1 is a schematic diagram showing a railway vehicle according to an embodiment of the present invention.
2 is a schematic diagram showing a door according to an embodiment of the present invention.
3 is a block diagram of an apparatus for diagnosing defects in a door of a railroad car and calculating the remaining service life according to an embodiment of the present invention.
4 is a flowchart of a method for diagnosing a defect in a door of a railroad car and calculating the remaining service life according to an embodiment of the present invention.
5 is a flowchart of step S310 of FIG. 4 .
6 is a flowchart of step S420 of FIG. 5 .
FIG. 7 is a flowchart of part of step S430 of FIG. 5 .
8 is a flowchart of another part of step S430 of FIG. 5 .
9 is a graph exemplarily illustrating a current applied to a driving motor that operates a door when the door is opened and closed.
FIG. 10 is a graph of current obtained by smoothing 10 currents shown in FIG. 9 .
11 is a graph exemplarily illustrating a current applied to a driving motor when an obstacle is present when a door is opened.
12 is a graph illustrating a current applied to a driving motor when an obstacle is present when a door is closed.
13 is a flowchart of step S470 of FIG. 5 .
14 is a flowchart of step S330 of FIG. 4 according to an example.
15 is a graph illustrating door usage according to indexes.
It should be understood that the drawings referenced above are not necessarily drawn to scale and present rather simplified representations of various preferred features illustrating the basic principles of the present disclosure. Certain design features of the present disclosure, including, for example, particular dimensions, orientations, locations, and shapes, will be determined in part by the particular intended application and environment of use.

The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the present disclosure. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprise" and/or "comprising", when used herein, specify the presence of recited features, integers, steps, operations, components and/or components, but It will also be understood that does not exclude the presence or addition of one or more of the features, integers, steps, acts, elements, components and/or groups thereof. As used herein, the term "and/or" includes any one or all combinations of the associated listed items.

As used herein, terms such as “vehicle” or “vehicle” or other similar terms refer to cars, buses, trucks, various commercial vehicles, including sport utility vehicles (SUVs) as well as rail vehicles. It is understood to include vehicles.

Additionally, it is understood that one or more of the methods below or aspects thereof may be executed by at least one control unit (eg, electronic control unit (ECU), etc.), controller, or control server. . The terms "control unit", "controller", or "control server" may refer to a hardware device that includes a memory and a processor. The memory is configured to store program instructions and the processor is specially programmed to execute the program instructions to perform one or more processes described in more detail below. A control unit, controller, or control server, as described herein, may control the operation of units, modules, components, devices, or the like. It is also understood that the methods below may be practiced by an apparatus that includes a control unit or controller along with one or more other components, as recognized by a person skilled in the art.

In addition, the control unit, controller, or control server of the present disclosure may be implemented as a non-transitory computer-readable recording medium including executable program instructions executed by a processor. Examples of computer-readable recording media include ROM, RAM, compact disk ROM, magnetic tapes, floppy disks, flash drives, smart cards, and optical data storage devices. It is not limited to this. The computer readable recording medium may also be distributed throughout a computer network to store and execute program instructions in a distributed manner, such as, for example, a telematics server or a controller area network (CAN).

1 is a schematic diagram showing a railway vehicle according to an embodiment of the present invention.

As shown in Fig. 1, a railway vehicle 1 includes a plurality of vehicles 5 connected to each other. The vehicle 5 is capable of carrying passengers or cargo, and a plurality of bogies 10 are installed under the vehicle 5 to enable the vehicle to move on the track. An engine room may be formed in one of the plurality of vehicles 5, and a control server or controller 160 and a display 170 may be disposed in the engine room.

A truck 10 is usually composed of two or three axle assemblies and supports a vehicle body. The bogie 10 includes a bogie frame, an axle assembly mounted on the bogie frame, a shock absorber, a braking device, a traction motor 14, a gear box 16, and the like.

The traction motor 14 generates power for the railroad car 1 to move on the track by using electric energy supplied through the collector 68. The current collector 68 is connected to an electric car line installed on the railroad car 1 and receives electric energy from the electric car line. The catenary line may form an electric circuit together with the railway vehicle 1 and the track. A circuit breaker 66 is installed between the current collector 68 and the railroad car 1 to protect a circuit in the railroad car 1 from overcurrent.

The gear box 16 includes a plurality of gears meshed with each other, converts power generated by the traction motor 14 according to a gear ratio, and transmits the converted power to the wheels 12 through an axle assembly. Since the bogie 10 is well known to those skilled in the art, further detailed description thereof will be omitted.

The railway vehicle 1 further includes a door 20 through which passengers can get in or out, and a door control unit 22 that controls the operation of the door 20 . The door 20 may be opened or closed under the control of the door control unit 22 .

The railway vehicle 1 further includes a battery 30 and an air compressor 32 . The battery 30 supplies power to the air compressor 32, and the air compressor 32 operates by the power of the battery 30 to compress air. The air compressed in the air compressor 32 is used for braking, suspension, or the collector 68. To this end, the air compressor 32 may be controlled by the brake control unit 36 .

The railroad car 1 further includes a broadcast communication device 40, a wireless communication device 50, and a fire alarm 62. The broadcast communication device 40 transmits information visually or audibly to passengers, and the wireless communication device 50 communicates data wirelessly with a control server or controller of another railway vehicle 1 or a control server in a control room. has been For example, the wireless communicator 50 can communicate with an external server or other railway vehicles 1 through a wireless communication protocol such as Bluetooth, ZigBee, Wi-Fi, and LTI. The fire alarm 62 may detect whether a fire has occurred in the vehicle 5 and transmit a signal to the controller 160, an external server, or other railroad vehicle 1.

The railway vehicle 1 further includes a heating, ventilation, and air conditioning (HVAC) 60 . The air conditioner 60 maintains a comfortable indoor environment by maintaining the temperature inside the vehicle 5 at an appropriate temperature regardless of external temperature changes.

The railway vehicle 1 further includes a main transformer 34 and a switchboard 64. The main transformer 34 converts the high voltage received through the current collector 68 into a voltage required by each electrical component and supplies the converted voltage. Various switches are provided in the switchboard 64, and the switches control the connection between the main transformer 34 and each electric component.

2 is a schematic diagram showing a door according to an embodiment of the present invention.

As shown in FIG. 2 , the door 20 includes first and second door panels 202 and 204 , a drive motor 210 , a screw shaft 212 , and a fork assembly 220 . In addition, the door 20 further includes a door operation detection sensor 230, a door lock detection sensor 240, an internal emergency handle 250, and an external emergency handle 260. It can be understood that the door 20 shown in FIG. 2 is an example of a subway door, and the door that can be diagnosed using the embodiment of the present invention is not necessarily limited to the door 20 shown in FIG. will be.

The driving motor 210 receives current and rotates to open or close the first and second door panels 202 and 204 . The drive motor 210 includes a motor shaft, and the motor shaft is connected to the screw shaft 212 through a coupling 214 to transmit rotational force.

The screw shaft 212 receives rotational force from the drive motor 210 and rotates. A screw thread is formed on the outer circumferential surface of the screw shaft 212 .

The fork assembly 220 is movably coupled to the screw shaft 212 through a nut unit. In addition, the first and second door panels 202 and 204 are coupled to the fork assembly 220 . Since the nut unit is screwed to the screw thread of the screw shaft 212, when the screw shaft 212 rotates, the fork assembly 220 moves along the screw shaft 212 and the first and second door panels 202, 204) is moved. Accordingly, the door 20 may be opened or closed.

The internal emergency handle 250 and the external emergency handle 260 unlock the door 20 in an emergency so that the door 20 can be manually opened or closed from inside or outside the vehicle 5 .

The door operation detection sensor 230 may detect whether the door 20 is opened or closed, and the door lock detection sensor 240 may detect whether the door 20 is unlocked or locked.

3 is a block diagram of an apparatus for diagnosing defects in a door of a railroad car and calculating the remaining service life according to an embodiment of the present invention.

As shown in FIG. 3, the device for diagnosing defects in the door 20 of the railway vehicle 1 and calculating the remaining life according to an embodiment of the present invention includes a data detector 100, a controller 160, a display ( 170), a speaker 180, and a mobile device 190.

The data detector 100 detects data for diagnosis of the door 20 . For example, the data may include state values (eg, first, second, third, fourth, and fifth state values) for evaluating the performance of the door 20 . The data detector 100 may include a door operation detection sensor 230 , a door lock detection sensor 240 , an ammeter 110 , and a timer 120 .

The door operation detection sensor 230 may detect whether the door 20 is completely closed or completely opened by detecting the positions of the first and second door panels 202 and 204 . Accordingly, the door operation detection sensor 230 detects the operation of the door 20 and transmits a signal corresponding thereto to the controller 160 .

The door lock detection sensor 240 detects whether the mechanical locking mechanism of the door 20 is released or locked. Typically, the mechanical locking mechanism is released or locked at the beginning or end of operation when the door 20 is opened or closed, in order to maintain the open or closed state of the door 20 . Accordingly, the door lock detection sensor 240 detects the operation of the mechanical locking mechanism and transmits a corresponding signal to the controller 160 .

The ammeter 110 detects the current applied to the driving motor 210 and transmits a signal corresponding thereto to the controller 160 .

The timer 120 measures the time required from the start of a specific event and transmits a signal for this to the controller 160 . For example, the start time of a specific event may be the start time of a door operation section.

The controller 160 is communicatively connected to the data detector 100 and is configured to receive a signal for data detected by the data detector 100 . The controller 160 diagnoses the door 20 using the signal received from the data detector 100 . For this purpose, the controller 160 may be implemented with one or more processors 162 that operate according to a set program, and the set program diagnoses a defect in a door of a railroad car according to an embodiment of the present invention and remaining service life. It may be programmed to perform each step of the method of calculating .

The controller 160 includes a database 164 , which may include, for example, a buffer database 166 and a diagnostic database 168 .

When it is determined that the door 20 is out of order, the controller 160 may store a failure code and transmit a warning signal to the display 170 , the speaker 180 , and/or the mobile device 190 . A mechanic may repair or replace the door 20 based on the warning signal.

4 is a flowchart of a method for diagnosing a defect in a door of a railroad car and calculating the remaining service life according to an embodiment of the present invention.

As shown in FIG. 4, the method for diagnosing a defect in the door 20 of a railroad car 1 and calculating the remaining life according to an embodiment of the present invention includes setting a state value for diagnosis of the door 20. Step (S300), step of building an index database (S310), step of comparing the detected index with a reference index in the database (S320), comparison result door 20 between the detected index and the reference index in the database A step of diagnosing defects of (S330) and a step of calculating the remaining life of the door 20 through trend analysis of the index (S340). If the index detected in the step of diagnosing the defect of the door 20 (S330) is greater than the reference index in the database, a fault code is stored. In addition, the method for diagnosing defects in the door 20 of the railroad car 1 and calculating the remaining life according to an embodiment of the present invention sends a warning signal to a display 170, a speaker 180, an external server, and/or Transmitting the warning signal to the mobile device 190, visually outputting the warning signal through the display 170, audibly outputting it through the speaker 180, or visually outputting the warning signal through the external server and/or the mobile device 190. , may further include audibly or tactilely outputting.

Here, the state value means data for evaluating the performance of the door 20 of the railroad car 1, and a plurality of state values (eg, first, second, and third) are used to diagnose the door 20. , 4, 5 status values) can be set. For accuracy of diagnosis, the state value may be processed into an index, and the index may be processed into a reference index. Accordingly, the door 20 of the railroad car 1 can be diagnosed by comparing an index according to a state value with a reference index. Here, the index may be the state value or may be calculated by processing the state value, and the reference index may be calculated by applying a setting factor to the index. Also, when a plurality of state values are set, a plurality of indices and a plurality of reference indices may be calculated. For example, if the state value includes the first, second, third, fourth, and fifth state values, the first, second, third, fourth, and fifth indexes and the first, second, third, fourth, and fifth reference indexes are calculated. It can be. Here, the first index may be the first state value or may be calculated by processing the first state value, and the first reference index may be calculated by applying a set factor to the first index. Also, the second index may be the second state value or may be calculated by processing the second state value, and the second reference index may be calculated by applying a set factor to the second index. Similarly, the third index may be the third state value or may be calculated by processing the third state value, the third reference index may be calculated by applying a setting factor to the third index, and the fourth index may be calculated by processing the third state value. A fourth state value, or calculated by processing the fourth state value, the fourth reference index may be calculated by applying a setting factor to the fourth index, and a fifth index is the fifth state value, or It is calculated by processing the fifth state value, and the fifth reference index may be calculated by applying a setting factor to the fifth index.

Here, the setting factor for the first reference index is a setting factor for the second reference index, a setting factor for the third reference index, a setting factor for the fourth reference index, and/or a setting factor for the fifth reference index. may be the same or different. That is, a setting factor for one reference index may be the same as or different from a setting factor for another reference index.

The step S310 may be performed when the database is not established because the door 20 is initially mounted on the railroad car 1 or when the database is reset due to maintenance or replacement of the door 20 of the railroad car 1. Also, step S320 may be performed only when a reference index exists in the diagnosis database 168.

5 is a flowchart of step S310 of FIG. 4 .

As shown in FIG. 5, the step of constructing the index database (S310) starts by setting the maximum number of state values that can be stored in the buffer database 166 (S410). For example, the user may set the maximum number of state values in consideration of the memory capacity of the buffer database 166 and the like. Alternatively, the controller 160 may set the maximum number of state values by itself in consideration of the memory capacity of the buffer database 166 and the like. In addition, when a plurality of state values are set, the maximum number of state values that can be stored in the buffer database 166 may be set for each state value.

When the maximum number of state values is set, the data detector 100 detects data for diagnosis of the door 20 (S420), processes the detected data, and stores it as state values in the buffer database 166 (S430). ). Here, the data includes the current applied to the drive motor 210 . In addition, the state values include state values 1, 2, 3, 4, and 5. The first state value is the release peak current in the door release section in which the door 20 is released, and the second state value is the door release peak current. The current during the actually opened or closed door operation period or the average of the currents, the third state value may be the locking peak current in the door locking period in which the door is locked after the door operation period, and the fourth state value is the driving motor in a specific time domain. 210 is the integral value of the current applied to the time, and the fifth state value is the integral of the m square of the current applied to the drive motor 210 in a specific time domain (where m is an integer greater than or equal to 2) of the time integral value. can be a value That is, the state value may include a time integral value of m square of the current applied to the driving motor 210 in a specific time domain (here, m is an integer greater than or equal to 1).

Hereinafter, the step of detecting data for diagnosis of the door 20 ( S420 ) will be described in more detail with reference to FIGS. 6 and 9 .

6 is a flowchart of step S420 of FIG. 5 .

As shown in FIG. 6 , the step of detecting data (S420) starts by detecting a door operation signal (S510). Here, the door operation signal may be a signal to open the door 20 or a signal to close the door 20 . The door operation signal may be generated by the door control unit 22 based on the operation of the railway vehicle 1 . If the door operation signal is not detected in step S510, step S420 does not proceed.

Also, the controller 160 determines whether the door lock detection sensor 240 detects a door release signal (S520). Step S520 continues until a door release signal is detected.

Upon detecting the door operation signal and the door release signal, the ammeter 110 measures the current applied to the driving motor 210 (S530). 9 is a graph exemplarily illustrating a current applied to a driving motor that operates a door when the door is opened and closed. 9 shows the current from when the door 20 is opened until it is closed. However, since the defect of the door 20 can be diagnosed when the door 20 is opened or when the door 20 is closed, the current when the door 20 is opened or closed is normally measured in step S530. . In addition, as shown in FIG. 9 , it can be seen that the current when the door 20 is opened and the current when the door 20 is closed have a similar pattern to each other. That is, it can be seen that the current rapidly increases at the beginning of operation, the current is maintained substantially constant during the middle of operation, and the current rapidly increases again at the end of operation. The first, second, and third state values for diagnosis of the door 20 may be set using the current pattern. In addition, when the door 20 is normally opened or closed, the sum of currents applied in each time period or the sum of m squares of currents applied in each time period (where m is an integer equal to or greater than 2) is maintained almost constant. Able to know. Accordingly, the fourth and fifth state values for diagnosis of the door 20 may be set. This will be described later.

Step S530 continues until the door lock detection sensor 240 detects a door lock signal (S540).

Hereinafter, with reference to FIGS. 7, 8, and 10 to 12, processing the detected data and storing the detected data as state values in the buffer database 166 (S430) will be described in more detail.

FIG. 7 is a flowchart of part of step S430 of FIG. 5 , and FIG. 8 is a flowchart of another part of step S430 of FIG. 5 .

As shown in FIGS. 7 and 8 , the step of processing the detected data and storing it as a state value in the buffer database 166 (S430) starts by smoothing the measured current (S610). Since the measured current may include high-frequency noise, the measured current is smoothed using a low pass filter or a moving average as a preprocessing for diagnosis.

FIG. 10 is a graph of current obtained by smoothing 10 currents shown in FIG. 9 . 10 shows a graph of current obtained by measuring the current 10 times from the time the door 20 is opened until it is closed, and smoothing the measured current 10 times using a moving average.

As shown in FIG. 10 , the procedure for opening or closing the door 20 generally includes three characteristic operating sections and two transition sections.

For example, when the door 20 is opened, the mechanical locking mechanism of the door 20 is released at the initial stage of opening. Since a considerably large torque is required to unlock the mechanical locking mechanism of the door 20, a large current flows through the driving motor 210. Here, a period in which the mechanical locking mechanism of the door 20 releases when the door 20 is opened is referred to as a door release period O1. In addition, the door releasing period O1 may be defined as a time point at which the current increases and then decreases from the time of detecting the door operation signal and the door release signal, and the first set current Uom can be used That is, the door release period O1 may be defined as a point in time from when the door operation signal and the door release signal are detected to a point in time when the current is greater than or equal to the first set current Uom and less than the first set current Uom.

When the mechanical locking mechanism of the door 20 is released, the current flowing through the driving motor 210 gradually decreases. However, since this reduction in current does not have a significant effect on the operation control of the door 20, the first transition period T1 is defined as a period from the door releasing period O1 to the end of the current reduction. The first transition period T1 is not included in the characteristic operating period. However, when a defect occurs in the door 20, even during the first transition period T1, the current applied to the drive motor 210 or the integral value of the m square of the current is the normal current or the m square of the current. Since the integral value with respect to the time of , even during the first transition period (T1), the current applied to the drive motor 210 or the integral value with respect to the time of m square of the current is used to diagnose the defect of the door 20. can have meaning in order to

After the first transition period T1, the door 20 is substantially opened, and at this time, the current is maintained substantially constant. Here, a period in which the door 20 is substantially opened is referred to as a door operating period O2 . Various methods may be used to define the door operation section O2, but a set time is used in this specification. That is, the door 20 may be set to be substantially opened for a set time period, and it may be defined that the door operation period O2 ends when the set time elapses after the door operation period O2 starts.

After the door operation period O2 is finished and until the mechanical locking mechanism of the door 20 is locked, the current flowing through the driving motor 210 is not controlled according to a special strategy and has a great influence on the operation control of the door 20. do not harm Therefore, the second transition period T2 is defined as the time from when the door operation period O2 ends to the time when the mechanical locking mechanism of the door 20 starts to be locked, and the second transition period T2 also has a characteristic operation. not included in the range. However, when a defect occurs in the door 20, the current applied to the driving motor 210 or the integral value of the m square of the current applied to the driving motor 210 even during the second transition period T2 is the normal state current or the m square of the current. Since the integral value with respect to the time of , even during the second transition period (T2), the current applied to the drive motor 210 or the integral value with respect to the time of m square of the current is used to diagnose the defect of the door 20. can have meaning in order to

Then, since a considerably large torque is required to release the mechanical locking mechanism of the door 20, a large current flows again to the driving motor 210. Here, a period in which the mechanical locking mechanism of the door 20 is locked when the door 20 is opened is referred to as a door locking period O3. In addition, the door locking period O3 may be defined as a point in time at which the current increases and then decreases, and the third set current Pom may be used to determine whether the current increases and then decreases. That is, the door locking period O3 may be defined as a point in time from when the current is greater than or equal to the third set current Pom to less than the third set current Pom.

Similar to the case where the door 20 is opened, three characteristic operating sections and two transition sections are defined even when the door 20 is closed. That is, the door release period C1 may be defined as a point in time from when the door operation signal and the door release signal are detected to a point in time when the current is greater than or equal to the first set current Ucm and less than the first set current Ucm. 1 transition period (T3) may be defined as the time point at which current reduction ends from the door release period (C1), and the door operation period (C2) is the time when the set time elapses from the start of the door operation period (C2). up to, and the second transition period T4 may be defined from the time when the door operation period C2 ends to the time when the mechanical locking mechanism of the door 20 starts to be locked, and the door locking period ( C3) may be defined as a time point from when the current is greater than or equal to the third set current Pcm to less than the third set current Pcm.

When the door 20 is opened or the door 20 is closed, one period includes the door release period (O1, C1), the first transition period (T1, T3), the door operation period (O2, C2), and the second transition period. Sections T2 and T4 and door locking sections O3 and C3 are sequentially included.

Referring back to FIGS. 7 and 8 , the controller 160 detects the release peak currents Uox and Ucx as first state values in the door release sections O1 and C1 (S620). Here, the release peak current (Uox, Ucx) is defined as the maximum current value in the door release section (O1, C1). That is, when the door 20 is opened, the first state value is the release peak current Uox in the door release section O1, but when the door 20 is closed, the first state value is the release peak current in the door release section C1. is the current (Ucx). When there is a problem with the door 20, since the current applied to the drive motor 210 increases in the door releasing section O1 and C1, the first state value is defined as the maximum current value in the door releasing section O1 and C1. It can be.

Then, the controller 160 determines whether the first transition period (T1, T3) has started. That is, the controller 160 determines whether the detected current is less than the first set current (Uom, Ucm) (S630). The reason for determining whether the first transition intervals T1 and T3 have started is to accurately determine the start of the door operation intervals O2 and C2. That is, when the current decreases after the mechanical locking mechanism of the door 20 is released, a large current fluctuation may occur due to noise or the like. In this situation, if the slope of the current is used to determine the door operation ranges O2 and C2, the start of the door operation ranges O2 and C2 cannot be accurately determined due to current signal distortion. Accordingly, the start of the door operating sections O2 and C2 may be accurately determined by calculating the slope of the current from the point at which the current stably decreases.

If it is determined that the current detected in step S630 is less than the first set current (Uom, Ucm), the controller 160 calculates the slope of the current (S640). As described above, the current is stably maintained at a constant value in the door operating sections O2 and C2. This means that the absolute value of the slope of the current is small.

Then, the controller 160 determines whether the absolute value of the current slope is less than the set slope (S650). That is, when the absolute value of the current slope is less than the set slope, it means that the current is stably maintained at a constant value, and accordingly, the start of the door operating sections O2 and C2 can be determined.

If the absolute value of the current slope is greater than or equal to the set slope in step S650, the controller 160 determines that the first transition period (T1, T3) is in progress and continues to calculate the current slope (S640).

In step S650, if the absolute value of the current slope is less than the set slope, the controller 160 determines that the door operating section (O2, C2) has started and controls the current or average current for the set time (ie, during the door operating section). It is detected as a two-state value (S660).

During step S660, the controller 160 determines whether the current is greater than or equal to the second set current (S670). The fact that the door 20 is not closed or opened by a passenger or an obstacle occurs when the door 20 is actually closed or opened. That is, the abnormal operation of the door 20 occurs in the door operating sections O2 and C2.

11 is a graph exemplarily showing the current applied to the drive motor when an obstacle is present when the door is opened, and FIG. 12 is a graph exemplarily showing the current applied to the drive motor when there is an obstacle when the door is closed. am.

As shown in FIGS. 11 and 12 , when the door 20 encounters an obstacle while being opened or closed, the load caused by the obstacle increases so that the current may be greater than the second state value by a set value da or more. If the state value detected during the abnormal operation of the door 20 is used to obtain the index and reference index, the index and reference index may be distorted. In addition, if the door 20 is diagnosed using the state value or index detected during abnormal operation, failure diagnosis and remaining life prediction become inaccurate. Accordingly, when the abnormal operation of the door 20 is detected, the controller 160 determines the state values detected in the period in which the abnormal operation is detected (eg, first, second, third, fourth, and fifth values in the corresponding period). state value) and prevent it from being used for database construction and diagnosis. That is, if it is determined that the current is greater than the second set current in the door operation section (O2, C2), the controller 160 deletes the data detected in the period in which the abnormal operation is detected (S675), terminate the method according to

Contrary to this, when it is determined that the current is less than or equal to the second set current in the door operating sections O2 and C2, the controller 160 determines whether the door operating sections O2 and C2 have ended. That is, the controller 160 determines whether a set time has elapsed after the start of the door operation section (O2, C2) (S680).

If the set time has not elapsed after the start of the door operating section (O2, C2) in step S680, the controller 160 returns to step S660 and continuously detects the current or the average of the currents as the second state value during the set time.

If it is determined in step S680 that the set time has elapsed after the start of the door operation period (O2, C2) (that is, when it is determined that the door operation period (O2, C2) has ended), the controller 160 sets the door locking period ( O3, C3) is started. That is, it is determined whether the current is equal to or greater than the third set current (Pom, Pcm) (S682). Step S682 is repeatedly performed until the current becomes equal to or greater than the third set current (Pom, Pcm).

If it is determined that the door locking period (O3, C3) has started, the controller 160 detects the locking peak current (Pox, Pcx) as a third state value (S684). Then, the controller 160 determines whether the current is less than the third set current (Pom, Pcm) (S686).

If it is determined in step S686 that the current is equal to or greater than the third set current (Pom, Pcm), the controller 160 returns to step S684 and continuously detects the lock peak current (Pox, Pcx) as the third state value.

If the current is determined to be less than the third set current (Pom, Pcm) in step S686, the controller determines the sum of the currents applied in each time interval (ie, the integrated value of the current applied in each time interval) and each The sum of m squares of currents applied in time intervals (where m is an integer greater than or equal to 2) (i.e., the integral value of m squares of currents applied in each time interval with respect to time) is detected as the 4th and 5th state values (S690). In one example, the integral value of the current over time in the door release section (O1, C1), the integral value of the current over time in the first transition section (T1, T3), the current in the door operation section (O2, C2) The time integral value of , the time integral value of the current in the second transition period (T2, T4), and/or the time integral value of the current in the door lock period (O3, C3) as the fourth state value can be detected. In addition, the integral value for the time of the m square of the current in the door release section (O1, C1), the integral value for the time of the m square of the current in the first transition section (T1, T3), the door operating section (O2, C2 ), the integral value over time of the m square of the current in the second transition period (T2, T4), the integral value over the time of the m square of the current in the second transition period (T2, T4), and / or the m square of the current in the door lock period (O3, C3) An integral value with respect to time of can be detected as a fifth state value. In another example, an integrated value with respect to time of current applied in two or more time intervals (eg, O1 and T1) is detected as a fourth state value, and two or more time intervals (eg, O1 and T1) are detected. ), an integral value of the m square of the applied current over time may be detected as the fifth state value. In another example, the time integral value of the current applied while the door is open (ie, at O1, T1, O2, T2, O3) and/or while the door is closed (ie, at C1, T3, C2, The integral value for the time of the applied current (at T4 and C3) is detected as the fourth state value, and at the time of the m square of the applied current while the door is open (ie, at O1, T1, O2, T2, and O3) An integral value for and/or an integral value for m squared time of the current applied while the door is closed (ie, at C1, T3, C2, T4, and C3) may be detected as the fifth state value.

Thereafter, the controller 160 stores the detected first, second, third, fourth, and fifth state values in the buffer database 166 (S695).

Referring back to FIG. 5 , when state values 1, 2, 3, 4, and 5 are stored in the buffer database 166, the controller 160 sets the number of state values stored in the buffer database 166 to the maximum state value. It is determined whether the number is greater than or equal to (S440). Since the 1st, 2nd, 3rd, 4th, and 5th state values are all stored during one period in which the door 20 operates normally, the controller 160 determines the number of one of the 1st, 2nd, 3rd, 4th, and 5th state values. It is determined whether the number of state values is greater than or equal to the maximum. Alternatively, it may be determined whether the total number of first, second, third, fourth, and fifth state values is greater than or equal to the maximum number of state values.

If the number of state values stored in the buffer database 166 is less than the maximum number of state values, the data detector 100 continuously detects data for diagnosis of the door 20 (S420).

If the number of state values stored in the buffer database 166 is greater than or equal to the maximum number of state values, the controller 160 transfers the state values in the buffer database 166 to the diagnosis database 168, and the state values in the buffer database 166 The value is deleted (S450). Since the number of state values stored in the buffer database 166 is the maximum number of state values or the product of the maximum number of state values and the number of types of state values, memory resources of the buffer database 166 can be efficiently managed. there is.

When state values are transferred from the buffer database 166 to the diagnostic database 168, the controller 160 processes the state values in the diagnostic database 168 to calculate an index and reference index (S460), and the index and reference index stored in diagnostic database 168. Here, since the state values include state values 1, 2, 3, 4, and 5, the index and reference index are the first index and the first reference index for the first state value, and the index for the second state value. The second index and the second reference index, the third index and the third reference index for the third state value, the fourth index and the fourth reference index for the fourth state value, and the fifth state value for the fifth state value index and a fifth reference index. In addition, the first index is a first state value and an average or standard deviation of the first state value, the first reference index is a value obtained by applying a set factor to the first index, and the second index is a second state value, the average or standard deviation of the second state value, the second reference index is a value obtained by applying a set factor to the second index, and the third index is the third state value or the average or standard deviation of the third state value; The third reference index is a value obtained by applying a set factor to the third index, the fourth index is the fourth state value and the average or standard deviation of the fourth state value, and the fourth reference index is a value obtained by applying a set factor to the fourth index. The applied value, the fifth index may be a fifth state value and an average or standard deviation of the fifth state value, and the fifth reference index may be a value obtained by applying a set factor to the fifth index.

Then, the controller 160 updates the diagnostic database 168 (S470).

Hereinafter, a step of updating the diagnostic database 168 will be described in detail with reference to FIG. 13 .

13 is a flowchart of step S470 of FIG. 5 .

As shown in FIG. 13, updating the diagnostic database 168 (S47) includes indexes 1, 2, 3, 4, and 5 in the diagnostic database 168 and indexes 1, 2, 3, 4, This is performed when a 5-standard index is stored. That is, if the first, second, third, fourth, and fifth indexes and the first, second, third, fourth, and fifth reference indexes are stored in the diagnosis database 168, the data detector 100 diagnoses the door 20. Detect data for (S710). Here, the data includes the current applied to the drive motor 210 .

The controller 160 processes the data detected by the data detector 100 and stores the first, second, third, fourth, and fifth state values in the buffer database 166 (S720). The controller 160 determines whether the number of state values (eg, one of first, second, third, fourth, and fifth state values) stored in the buffer database 166 is greater than or equal to the maximum number of state values (n). (S730).

If the number of state values stored in the buffer database 166 is less than the maximum number of state values, the data detector 100 continuously detects data for diagnosis of the door 20 (S710).

If the number of state values stored in the buffer database 166 is greater than or equal to the maximum number of state values, the controller 160 transfers the first, second, third, fourth, and fifth state values in the buffer database 166 to the diagnosis database 168. and the 1st, 2nd, 3rd, 4th, 5th state values of the corresponding class in the buffer database 166 are deleted (S740).

Then, the controller 160 updates the first, second, third, fourth, and fifth indexes and the first, second, third, fourth, and fifth reference indexes in the diagnosis database 168 (S750). For example, the 1st, 2nd, 3rd, 4th and 5th indices defining probability distribution functions approximate to the distributions of the 1st, 2nd, 3rd, 4th and 5th state values are respectively updated. For example, the number, average, and variance of the first state values in the diagnostic database 168 before the update are Nc, Ac, and σ _c ² , respectively, and the number, average, and variance of the first state values transferred from the buffer database 166. If the variances are n, a, and σ ² respectively, the number, mean, and variance of the first state values in the diagnostic database 168 after updating are as follows.

Number of first state values after update = Nc+n

Average of first state values after update = (Ac*Nc + a*n)/(Nc + n)

Variance of first state values after update = (σ _c ² *Nc + σ ² *n)/(Nc + n)

As mentioned above, since the first index can be defined as the average or standard deviation of the first state values, the first index is also updated when the average and variance of the first state values are updated. Additionally, when the first index in the diagnostic database 168 is updated, the first reference index in the diagnostic database 168 is updated accordingly.

After that, the controller 160 determines whether the number of state values (eg, one of first, second, third, fourth, and fifth state values) stored in the diagnostic database 168 is greater than or equal to the number of set state values. It does (S760). The performance of the door 20 is high at the initial stage of installation, replacement, or maintenance, and decreases as the period of use increases. Accordingly, performance of the door 20 at the initial stage of installation, replacement, or maintenance may be used as a criterion for evaluating the performance of the door 20 . In addition, memory resources of the diagnostic database 168 can be efficiently managed by limiting the number of state values stored in the diagnostic database 168 . In addition, by using the performance of the door 20 at the initial stage of installation, replacement, or maintenance as a criterion for evaluating the performance of the door 20, the defect of the door 20 can be accurately diagnosed.

In step S760, if the number of state values stored in the diagnosis database 168 is less than the number of set state values, the data detector 100 continuously detects data for diagnosis of the door 20 (S710).

In step S760, if the number of state values stored in the diagnostic database 168 is greater than or equal to the number of set state values, the controller 160 prohibits updating of indexes and reference indexes in the diagnostic database 168 (S770). In some embodiments, an update period in which the diagnostic database 168 can be updated may be set, and when the update period elapses from the time when the database construction starts, updating of indexes and reference indexes in the diagnostic database 168 may be prohibited. Also, if updating of indexes and reference indexes in the diagnostic database 168 is inhibited, the controller 160 may delete corresponding state values stored in the diagnostic database 168 . Accordingly, memory resources of the diagnosis database 168 can be managed. Further, if updating of indexes and reference indexes in diagnostic database 168 is inhibited, controller 160 may inhibit the transfer of state values from buffer database 166 . In this case, if the number of state values stored in the buffer database 166 is greater than or equal to the maximum number of state values, the controller 160 assigns indexes 1, 2, 3, 4, and 5 in the buffer database 166 to the diagnostic database 168. ), respectively, and can be deleted without transferring the first, second, third, fourth, and fifth state values in the buffer database 166.

Hereinafter, the step of diagnosing the defect of the door 20 (S330) will be described in more detail with reference to FIG. 13 .

14 is a flowchart of step S330 of FIG. 4 according to an example.

As shown in FIG. 14 , the controller 160 determines whether the first index in the buffer database 166 or the diagnostic database 168 is greater than or equal to the first reference index in the diagnostic database 168 (S810). That is, if the first state values in the buffer database 166 are transferred to the diagnostic database 168, the controller 160 determines whether the first index in the diagnostic database 168 is greater than or equal to the first reference index in the diagnostic database 168. It is determined, and if the first state values in the buffer database 166 have not been transferred to the diagnostic database 168, the first state values in the buffer database 166 are processed to calculate the first index, and the first state values in the buffer database 166 are calculated. It is determined whether the first index is equal to or greater than the first reference index in the diagnosis database 168.

If it is determined in step S810 that the first index is greater than or equal to the first reference index, the controller 160 stores a fault code (S860). In contrast, if it is determined that the first index is less than the first reference index in step S810, the controller 160 determines that the second index in the buffer database 166 or the diagnostic database 168 is the second reference index in the diagnostic database 168. It is determined whether it is abnormal (S820).

If it is determined in step S820 that the second index is greater than or equal to the second reference index, the controller 160 stores a fault code (S860). In contrast, if it is determined that the second index is less than the second reference index in step S820, the controller 160 determines that the third index in the buffer database 166 or the diagnostic database 168 is the third reference index in the diagnostic database 168. It is determined whether it is abnormal (S830).

If it is determined that the third index is equal to or greater than the third reference index in step S830, the controller 160 stores a fault code (S860). In contrast, if it is determined that the third index is less than the third reference index in step S830, the controller 160 determines that the fourth index in the buffer database 166 or the diagnosis database 168 is the fourth reference index in the diagnosis database 168. It is determined whether it is abnormal (S840).

If it is determined that the fourth index is greater than or equal to the fourth reference index in step S840, the controller 160 stores a fault code (S860). In contrast, if it is determined that the fourth index is less than the fourth reference index in step S840, the controller 160 determines that the fifth index in the buffer database 166 or the diagnostic database 168 is the fifth reference index in the diagnostic database 168. It is determined whether it is abnormal (S850).

If it is determined in step S850 that the fifth index is greater than or equal to the fifth reference index, the controller 160 stores a fault code (S860). In contrast, if it is determined that the fifth index is less than the fifth reference index in step S850, the controller 160 determines that the door 20 is normally operated and proceeds to step S340.

If the fault code is stored in step S860, the controller 160 may transmit a warning signal to the display 170, the speaker 180, an external server, and/or the mobile device 190. The mechanic can service or replace the part based on the warning signal.

Meanwhile, in FIG. 14 , it is described that a failure code is stored if there is one positive determination in step S810, step S820, step S830, step S840, or step S850, but the embodiment of the present invention is not limited thereto. That is, when the number of positive decisions is greater than or equal to the set number in S810, S820, S830, S840, or S850, or a positive determination is made in S810, S820, S830, S840, or S850, If it is repeated more than a set number of times, a failure code can be saved. In this case, inaccuracy of diagnosis due to noise and external environment can be further reduced.

If it is determined that the door 20 operates normally in step S330, the controller 160 may calculate the remaining life of the door 20 (S340).

15 is a graph illustrating door usage according to indexes. The graph illustrated in FIG. 15 may be set in advance through experiments or the like.

As shown in FIG. 15 , when the number of uses of the door 20 increases, the index increases due to aging and performance degradation of parts that operate the door 20 . When the index increases to the failure index, maintenance or replacement of the door 20 is required. That is, an index corresponding to the target number of uses of the door 20 is defined as a failure index. Accordingly, the remaining life of the door 20 may be analyzed through trend analysis of indexes.

In step S340, the controller 160 estimates the current usage by using one of the first, second, third, fourth, and fifth indexes, and subtracts the current usage from the target usage to calculate the remaining life of the door 20. there is.

In contrast, the controller 160 estimates the current usage according to the first index, estimates the current usage according to the second index, estimates the current usage according to the third index, and estimates the current usage according to the fourth index. and estimate the current usage according to the fifth index. In addition, the controller 160 determines the maximum value of the current amount according to the first index, the current amount according to the second index, the current amount according to the third index, the current amount according to the fourth index, and the current amount according to the fifth index. The final current usage amount may be detected, and the remaining life of the door 20 may be calculated by subtracting the final current usage amount from the target usage amount.

Controller 160 may then notify the display 170 , speaker 180 , external server, and/or mobile device 190 of the calculated remaining life. The mechanic may prepare for replacement or maintenance of the door 20 based on the notified remaining life.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and is easily changed from the embodiments of the present invention by a person skilled in the art to which the present invention belongs, so that the same It includes all changes within the scope recognized as appropriate.

Claims (15)

A method for diagnosing a defect in a door of a railway vehicle and calculating the remaining life,
Setting a state value for door diagnosis;
Building a database of indexes for door diagnosis;
comparing the detected index with a reference index; and
If the detected index is greater than the reference index in the database, storing the failure code of the door;
including,
The step of building an index database for door diagnosis is
measuring a current applied to a driving motor that operates the door during a period of closing the door after opening the door;
storing, as a state value, an integral value of m square of the current applied to the driving motor in a specific time domain within the one period; and
calculating an index and a reference index by processing the state value;
Including,
The specific time period within the one period includes two door release sections in which the mechanical locking mechanism of the door is released, two door operating sections in which the door is actually opened or closed, two door locking sections in which the mechanical locking mechanism of the door is locked, A method for diagnosing defects in a door of a railway vehicle including two first transition sections between the door release section and the door operation section and two second transition sections between the door operation section and the door lock section and calculating the remaining life .
(However, m is an integer greater than 1) delete According to claim 1,
The state value is the integral value of m squared time of the current applied to the driving motor during the door release period, the first transition period, the door operation period, the second transition period, and the door lock period when the door is opened. How to diagnose door defects and calculate remaining life. According to claim 1,
The state value is the integral value of m squared time of the current applied to the driving motor during the door release period, the first transition period, the door operation period, the second transition period, and the door lock period when the door is closed. How to diagnose door defects and calculate remaining life. According to claim 1,
The database includes a buffer database in which the status value is stored and a diagnosis database in which indexes and reference indexes are stored,
The maximum number of state values that can be stored in the buffer database is set,
The state values stored in the buffer database are stored in the buffer database until the number reaches the set maximum state value, and the defect of the door of the railroad car is diagnosed and the remaining life is calculated. According to claim 5,
If the number of state values stored in the buffer database is greater than or equal to the maximum number of state values, the state values in the buffer database are transferred to the diagnostic database and the state values in the buffer database are deleted. method. According to claim 6,
A method of diagnosing a defect in a door of a railway vehicle and calculating the remaining life by calculating an index and a reference index by processing the state value in the diagnostic database when the state value is transferred to the diagnostic database. According to claim 7,
A method of diagnosing a defect in a door of a railway vehicle in which the index and reference index are updated until the number of state values stored in the diagnosis database reaches the set number and calculating the remaining life. According to claim 7,
A method of diagnosing a defect in a door of a railway vehicle in which updating of indexes and reference indexes is prohibited when the number of state values stored in the diagnosis database is more than a set number and calculating the remaining service life. According to claim 1,
The step of storing, as a state value, the integral value for the time of the m square of the current applied to the drive motor in a specific time domain within the one period as a state value, further comprising the step of smoothing the measured current. How to diagnose faults and calculate remaining life. According to claim 1,
The index is the state value, the average or standard deviation of the state value, and the reference index is a value obtained by applying a set factor to the index, diagnosing a defect in a door of a railroad car and calculating the remaining life. According to claim 1,
Further comprising calculating the remaining life of the door,
The steps to calculate the remaining life of the door are
estimating the current usage according to the index; and
Calculating the remaining life of the door based on the current usage amount and the target usage amount;
A method for diagnosing a defect in a door of a railway vehicle and calculating the remaining life. According to claim 12,
The step of calculating the remaining life of the door further includes the step of notifying the calculated remaining life. According to claim 5,
A method of diagnosing a defect in a door of a railway vehicle and calculating a remaining service life in which the step of comparing the detected index with the reference index is not performed if the reference index does not exist in the diagnosis database. A device for diagnosing a defect in a door of a railroad car and calculating the remaining life,
a data detector for measuring data including state values for door diagnosis; and
a controller configured to diagnose a failure of the door using the data detected by the data detector and calculate the remaining service life;
Including,
The controller diagnoses a defect in a door of a railroad vehicle and executes a method for diagnosing a defect in a door of a railroad vehicle and calculating a remaining service life according to any one of claims 1 and 3 to 14, and A device that calculates the remaining life.

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