System and method for diagnosing the health of railway vehicles

Abstract

To provide a technology capable of quickly confirming soundness of a railway vehicle after earthquake occurrence.SOLUTION: A soundness diagnosis system for a railway vehicle that diagnoses soundness of the railway vehicle after earthquake occurrence, includes a soundness diagnosis device having at least one memory that stores a predetermined program, and at least one processor that can access the memory, and a diagnosis result output device that is communicatively connected to the soundness diagnosis device and outputs a diagnosis result of the soundness diagnosis device. The soundness diagnosis device allows the processor to execute a program to acquire vibration acceleration data of the railway vehicle during a diagnosis object period predetermined between an earthquake occurrence time to an emergency stop time of the railway vehicle, to determine good / defective quality of the soundness for the railway vehicle on the basis of the vibration acceleration data, and to output a determination result as the diagnosis result to the diagnosis result output device.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a technique for diagnosing the soundness of a railway vehicle immediately after an earthquake occurs. [Background technology]

[0002] Traditionally, when a large-scale earthquake occurs, railway vehicle operations are immediately stopped, and the tracks and structures over which the tracks run, such as viaducts, are inspected to confirm their integrity before railway vehicle operations are resumed. In order to shorten the time from when operations are stopped to when they are resumed, it is necessary to quickly conduct inspections and grasp the situation.

[0003] Therefore, Patent Document 1 proposes a traffic operation management method for managing train operations when an earthquake occurs, which can shorten the time until train operations are resumed by efficiently performing inspections. In this method, train operations are stopped in the area where an earthquake is detected, and an inspection schedule is created by setting a high inspection priority for structures that are prone to shaking out of multiple structures included in that area. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-28224 Summary of the Invention [Problem to be solved by the invention]

[0005] Patent Document 1 proposes a method for inspecting structures along railway tracks, but it does not inspect the soundness of railway vehicles after an earthquake. After a large-scale earthquake, it is also necessary to confirm the soundness of railway vehicles. In order to shorten the time until train service resumes after an earthquake, it is desirable to be able to confirm the soundness of railway vehicles as soon as possible after the earthquake.

[0006] The present disclosure has been made in consideration of the above circumstances, and its purpose is to provide a technology that can quickly confirm the soundness of a railway vehicle after an earthquake occurs. [Means for solving the problem]

[0007] In order to solve the above problem, a railway vehicle health diagnosis system in the event of an earthquake according to one aspect of the present disclosure is a system for diagnosing the health of a railway vehicle after an earthquake occurs, a health diagnosis device having at least one memory that stores a predetermined program and at least one processor that can access the memory; a diagnostic result output device that is communicably connected to the health diagnosis device and outputs a diagnostic result of the health diagnosis device, The processor executes the program to acquire vibration acceleration data of the railway vehicle for a predetermined target period for diagnosis between an earthquake occurrence time and an emergency stop time of the railway vehicle, and When a noise with a larger amplitude than the others due to breakage, cracks, or abnormal damage of the components of the railway vehicle appears locally in the waveform of Railway vehicle integrity If the noise does not appear, the soundness of the railway vehicle is judged to be good. and outputs the result of the determination as the diagnostic result to the diagnostic result output device.

[0008] Furthermore, a method for diagnosing the health of a railway vehicle when an earthquake occurs according to one embodiment of the present disclosure is a method for diagnosing the health of a railway vehicle after an earthquake occurs, executed by at least one processor, the method comprising: acquiring vibration acceleration data of the railway vehicle for a predetermined diagnostic target period between the time of the earthquake occurrence and the time of the emergency stop of the railway vehicle; The vibration acceleration data When a noise with a larger amplitude than the others due to breakage, cracks, or abnormal damage of the components of the railway vehicle appears locally in the waveform of Railway vehicle integrity If the noise does not appear, the soundness of the railway vehicle is judged to be good. To determine the and outputting the result of the determination as a diagnosis result of the soundness of the railway vehicle. [Effects of the Invention]

[0009] According to one aspect of the present disclosure described above, it is possible to provide a technology that can quickly confirm the soundness of a railway vehicle after an earthquake occurs. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram illustrating a schematic configuration of a railway vehicle health diagnosis system according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a configuration diagram of a hardware system of the health diagnostic device. [Figure 3] FIG. 3 is a diagram showing the flow of the process of diagnosing the soundness of a railway vehicle by the soundness diagnosis device. [Figure 4] Figure 4 is a graph showing the time series changes in vibration acceleration from immediately after the earthquake until the railway vehicle makes an emergency stop. [Figure 5] Figure 5 is a graph showing the time series changes in vibration acceleration from immediately after the earthquake until the railway vehicle makes an emergency stop. [Figure 6] FIG. 6 is a diagram illustrating an example of the configuration of the diagnosis unit of the health diagnosis device. DETAILED DESCRIPTION OF THE INVENTION

[0011] [Configuration of health diagnosis system 100] Next, an embodiment of the present disclosure will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a health diagnosis system 100 for a railway vehicle 1 according to an embodiment of the present disclosure. As shown in FIG. 1, the health diagnosis system 100 for a railway vehicle 1 includes a health diagnosis device 5, at least one vibration acceleration sensor (a bogie vibration acceleration sensor 6, a carbody vibration acceleration sensor 7) mounted on the railway vehicle 1, and a diagnosis result output device 8. The health diagnosis device 5 and the diagnosis result output device 8 may be mounted on the railway vehicle 1. Alternatively, at least one of the health diagnosis device 5 and the diagnosis result output device 8 may be located in a vehicle operation control facility or the like away from the railway vehicle 1.

[0012] The railway vehicle 1 is composed of a bogie 2 and a car body 3. The car body 3 is supported by the bogie 2 via cushioning elements such as air springs. The railway vehicle 1 is made up of one or more cars and runs on rails as a train. A vehicle information integration system 10 is mounted on the car body 3 of at least one railway vehicle 1 in the train. The vehicle information integration system 10 includes, for example, a monitor device and is connected via transmission means to multiple devices mounted on the railway vehicle 1 so that information can be sent and received between them. By monitoring the vehicle information displayed on the monitor device of the vehicle information integration system 10, the driver can understand the vehicle's operating status and any problems that have occurred.

[0013] The car body 3 is equipped with at least one car body vibration acceleration sensor 7 that detects vibration acceleration in the vertical and / or horizontal directions of the car body 3. The car body vibration acceleration sensor 7 is disposed, for example, at a position on the floor of the car body 3 directly above the center of the bogie 2. Alternatively, multiple car body vibration acceleration sensors 7 may be disposed dispersedly on the car body 3.

[0014] The bogie 2 is equipped with at least one bogie vibration acceleration sensor 6 that detects vibration acceleration in the vertical and / or horizontal directions of the bogie 2. The bogie vibration acceleration sensors 6 are, for example, arranged diagonally distributed on the spring cap of the bogie frame of the bogie 2.

[0015] FIG. 2 is a configuration diagram of a hardware system of the vehicle health diagnosis device 5. As shown in FIG. 2, the vehicle health diagnosis device 5 is a so-called computing device that includes a processor (CPU) 51, a memory 50 accessible by the processor 51, including a ROM 52 and a RAM 53, and an input / output unit 54. The processor 51 is connected to the ROM 52, the RAM 53, and the input / output unit 54 via a bus. The input / output unit 54 is connected to the vehicle information integration system 10 via wired or wireless transmission means so as to be able to send and receive information. The input / output unit 54 is also connected to a monitor device 82 and an alarm 83 mounted on the vehicle body 3 via the transmission means so as to be able to send and receive information. The monitor device 82 and the alarm 83 function as the diagnosis result output device 8. The input / output unit 54 is also connected to an earthquake information input device 9, a bogie vibration acceleration sensor 6, a carbody vibration acceleration sensor 7, and an earthquake information transmission system 80 via the transmission means so as to be able to receive information. 2, one bogie vibration acceleration sensor 6 and one carbody vibration acceleration sensor 7 are shown as representatives, but a plurality of bogie vibration acceleration sensors 6 and a plurality of carbody vibration acceleration sensors 7 may be connected to the soundness diagnosis device 5. The input / output unit 54 is also connected to a storage device 56 so as to be able to read and store information.

[0016] 1, the health diagnosis device 5 includes functional units, namely, a vibration acceleration information collecting unit 501 and a diagnosis unit 502. These functional units are realized by the processor 51 executing a predetermined program stored in the memory 50.

[0017] The vibration acceleration information collecting unit 501 acquires vibration acceleration information output by the bogie vibration acceleration sensor 6 and the carbody vibration acceleration sensor 7, and stores the vibration acceleration information in the storage device 56. The vibration acceleration information includes identification information of the bogie vibration acceleration sensor 6 and the carbody vibration acceleration sensor 7, as well as measurement values ​​and measurement times of the vibration acceleration. A vibration acceleration database is constructed in the storage device 56, which accumulates vibration acceleration data including measurement values ​​and measurement times of the vibration acceleration for each of the bogie vibration acceleration sensor 6 and the carbody vibration acceleration sensor 7.

[0018] The diagnosis unit 502 reads out the vibration acceleration data stored in the vibration acceleration database and uses the vibration acceleration data to diagnose the health of the railway vehicle 1. Here, good health of the railway vehicle 1 means that no abnormalities such as damage have occurred in the bogies 2 and / or carbody 3 of the railway vehicle 1, and poor health of the railway vehicle 1 means that there is a risk that abnormalities such as damage have occurred in the bogies 2 and / or carbody 3 of the railway vehicle 1. Specific processing by the diagnosis unit 502 of the health diagnosis device 5 will be described in detail later.

[0019] [Method for diagnosing the soundness of railway vehicle 1] Here, a method for diagnosing the soundness of the railway vehicle 1 by the soundness diagnosis system 100 will be described with reference to Fig. 3. Fig. 3 is a diagram showing the flow of the soundness diagnosis process by the soundness diagnosis device 5.

[0020] The vibration acceleration information collection unit 501 of the soundness diagnosis device 5 steadily collects vibration acceleration data while the railway vehicle 1 is in operation (including during deceleration for an emergency stop). Here, the soundness diagnosis device 5 acquires vibration acceleration information output by the bogie vibration acceleration sensor 6 and the carbody vibration acceleration sensor 7, and stores the vibration acceleration information in the storage device 56. In this way, vibration acceleration data is accumulated in the vibration acceleration database of the storage device 56.

[0021] When the diagnosis unit 502 of the soundness diagnosis device 5 acquires the earthquake occurrence information (YES in step S1), it starts diagnosing the soundness of the railway vehicle 1 (step S2). The earthquake occurrence information preferably includes the time of the earthquake occurrence. Alternatively, if the earthquake occurrence information does not include the time of the earthquake occurrence, the soundness diagnosis device 5 regards the time of acquisition of the earthquake occurrence information as the time of the earthquake occurrence.

[0022] Earthquake occurrence information may be input to the train health assessment device 5 from the train information integration system 10. The train information integration system 10 receives earthquake occurrence information from outside and outputs it to the train health assessment device 5. Alternatively, the earthquake occurrence information may be input to the train health assessment device 5 using an earthquake information transmission system 80 provided on the railway vehicle 1. The earthquake information transmission system 80 includes a large number of seismometers installed along the railway line and a seismometer alarm control device connected to these seismometers via communication circuits. The seismometer alarm control device determines the area subject to an alarm based on the measurement values ​​of the seismometers and immediately issues an earthquake occurrence alert to all trains in the area via radio. The train health assessment device 5 may receive this alert as earthquake occurrence information. Alternatively, the earthquake occurrence information may be input to the train health assessment device 5 from an earthquake information input device 9. The earthquake information input device 9 is configured to, for example, acquire the running speed of the railway vehicle 1 from a speedometer mounted on the railway vehicle 1, determine an emergency stop when the gradient of decrease in the running speed reaches a predetermined value, and output earthquake occurrence information based on this emergency stop to the soundness diagnosis device 5. Alternatively, an emergency brake application signal may be transmitted to the soundness diagnosis device 5, and the soundness diagnosis device 5 may acquire the emergency brake application signal as earthquake occurrence information.

[0023] When diagnosing the health of the railway vehicle 1, the health diagnosis device 5 first reads out vibration acceleration data for a diagnosis target period from the vibration acceleration database. The diagnosis target period is set in advance as an arbitrary period from the time when an earthquake occurs until the railway vehicle 1 makes an emergency stop. The health diagnosis device 5 can know the time of earthquake occurrence from earthquake occurrence information. Furthermore, the health diagnosis device 5 can determine the time of emergency stop based on, for example, the speed information of the railway vehicle 1 transmitted from the vehicle information integration system 10. The diagnosis target period may be from the time when the earthquake occurs to the time of emergency stop. Alternatively, it may be from a predetermined time (e.g., 1 second) after the time when the earthquake occurs to the time of emergency stop. Alternatively, the diagnosis target period may be from a predetermined first time (e.g., 1 second) after the time when the earthquake occurs to a predetermined second time (e.g., 15 seconds) after the time when the earthquake occurs.

[0024] 4 and 5 are graphs showing the time-series changes in vibration acceleration from immediately after the occurrence of an earthquake until the railway vehicle 1 makes an emergency stop. In these graphs, the vertical axis represents vibration acceleration detected and measured by the bogie vibration acceleration sensor 6 arranged on the bogie frame of the bogie 2, and the horizontal axis represents elapsed time. When an earthquake occurs at time T1, the railway vehicle 1 decelerates due to the activation of the emergency brake, and the railway vehicle 1 makes an emergency stop at time T2, which is later than time T1. The period from time T1 to time T2 is the period under diagnosis. While the railway vehicle 1 is decelerating after the occurrence of an earthquake, i.e., during the period under diagnosis, the vibration acceleration of the bogie 2 and carbody 3 is affected by the earthquake.

[0025] If the railcar 1 (bogie 2 and / or carbody 3) is free of any abnormalities, such as damage, the waveform of the vibration acceleration data for the diagnostic period will exhibit a relatively uniform sine wave, as shown in Figure 4. On the other hand, if the railcar 1 is damaged or has other abnormalities, noise (disturbance) indicating an abnormality will appear in the waveform of the vibration acceleration data for the diagnostic period, as shown in Figure 5. The noise indicating an abnormality is a locally larger amplitude of vibration acceleration compared to the relatively uniform sine wave shown in Figure 4. When excessive vibrations are applied to the railcar 1 due to an earthquake, damage to the components of the railcar 1 may occur. For example, if a fracture occurs in a component of the railcar 1, the fractured surfaces of the components may come into contact with each other due to vibration, resulting in the superposition of impact components, which is thought to result in the noise shown in Figure 5. While we have given an example of a fracture in a component of the railcar 1, if an abnormality other than a fracture, such as a crack or damage, occurs in the component, parts that would not normally come into contact with each other will come into contact with each other, resulting in noise indicating an abnormality in the vibration acceleration data. Noise contained in the waveform of vibration acceleration data, which indicates the occurrence of an abnormality, can be extracted using a high-pass filter or band-pass filter.

[0026] FIG. 6 is a diagram showing an example of the configuration of the diagnosing unit 502 of the health diagnostic device 5. As shown in FIG. 6, the diagnosing unit 502 of the health diagnostic device 5 includes, for example, a filter 505 and a determiner 506. The filter 505 may be a high-pass filter or a band-pass filter designed to extract noise indicating the occurrence of an abnormality. The filter 505 filters the vibration acceleration data for the diagnostic target period to extract noise contained in the waveform of the vibration acceleration data. The determiner 506 determines the health to be poor if the filter 505 extracts noise indicating the occurrence of an abnormality, and determines the health to be good if no noise is extracted.

[0027] The soundness diagnosis device 5 outputs the determination result of the determiner 506 to the diagnosis result output device 8 as the diagnosis result of the soundness (step S3). As a result, the diagnosis result output device 8 presents the diagnosis result (good / bad) of the soundness of the railway vehicle 1. Here, the diagnosis result output device 8 may be a monitor device 82 or an alarm 83 provided at an appropriate location on the railway vehicle 1. The monitor device 82 displays and outputs the diagnosis result. The alarm 83 outputs the diagnosis result by sound or light. Alternatively, the diagnosis result output device 8 may be a monitor device provided in the vehicle information integrated system 10. The driver or worker can know whether or not there is an abnormality, such as damage, in the railway vehicle 1 from the diagnosis result output to the diagnosis result output device 8. In this way, in the soundness diagnosis system 100, if the railway vehicle 1 makes an emergency stop after an earthquake occurs, the soundness of the railway vehicle 1 can be diagnosed immediately, resulting in excellent immediacy.

[0028] [Summary] The health diagnosis system 100 for a railway vehicle 1 according to the present disclosure is a system for diagnosing the health of a railway vehicle 1 immediately after an earthquake occurs, a health assessment device 5 having at least one memory 50 storing a predetermined program and at least one processor 51 accessible to the memory 50; The system includes a diagnostic result output device 8 that is communicably connected to the health diagnostic device 5 and outputs the diagnostic result of the health diagnostic device 5. The soundness diagnosis device 5 is configured such that the processor 51 executes a predetermined program to acquire vibration acceleration data of the railway vehicle 1 for a predetermined diagnosis period between the time of the earthquake occurrence and the time of the emergency stop of the railway vehicle 1, determine whether the soundness of the railway vehicle 1 is good or bad based on the vibration acceleration data, and output the determination result to the diagnosis result output device 8 as the diagnosis result.

[0029] Furthermore, the method for diagnosing the health of a railway vehicle 1 according to the present disclosure includes: A method for diagnosing the health of a railway vehicle (1) after an earthquake, executed by at least one processor (51), comprising: acquiring vibration acceleration data of the railway vehicle for a predetermined diagnostic target period between the time of the earthquake occurrence and the time of the emergency stop of the railway vehicle; Determining whether the health of a railway vehicle is good or bad based on vibration acceleration data; and The result of the determination is output as a diagnosis result of the soundness of the railway vehicle.

[0030] According to the railway vehicle 1 health diagnosis system 100 and method configured as described above, the good / bad health of the railway vehicle 1 (i.e., the presence or absence of abnormalities such as damage) is diagnosed using vibration acceleration data from the time of the earthquake occurrence to the time of the emergency stop of the railway vehicle 1 at the longest. Therefore, drivers and workers can quickly check the health of the railway vehicle 1 after the earthquake occurs. This can contribute to shortening the time from the occurrence of an earthquake to the resumption of service.

[0031] In the above-described health diagnosis system 100 for a railway vehicle 1, the health diagnosis device 5 may be configured to determine the health as poor when noise appears in the waveform of the vibration acceleration data, and to determine the health as good when no noise appears. Here, the health diagnosis device 5 may have a filter 505 that extracts noise from the vibration acceleration data.

[0032] Similarly, in the above-described method for diagnosing the soundness of railway vehicle 1, the soundness may be judged as poor when noise appears in the waveform of vibration acceleration data, and may be judged as good when no noise appears.

[0033] It is expected that noise will appear in the waveform of the vibration acceleration data if an abnormality such as breakage or damage occurs in the bogie 2 or carbody 3 of the railway vehicle 1. This phenomenon can be used to determine the soundness of the railway vehicle 1.

[0034] In the above-described soundness diagnosis system 100 for the railway vehicle 1, the soundness diagnosis device 5 may be configured to start acquiring vibration acceleration data when triggered by the input of earthquake occurrence information.

[0035] Similarly, in the above-described method for diagnosing the soundness of railway vehicle 1, the acquisition of vibration acceleration data may be started in response to the input of earthquake occurrence information.

[0036] In this way, the input of earthquake occurrence information is used as a trigger to start processing for health diagnosis, so that the processing of health diagnosis system 100 during normal operation of railway vehicle 1 can be reduced.

[0037] Furthermore, the health diagnosis system 100 for the railway vehicle 1 may further include at least one of a bogie vibration acceleration sensor 6 mounted on the bogie 2 of the railway vehicle 1 and a carbody vibration acceleration sensor 7 mounted on the carbody 3, and a vibration acceleration database that stores vibration acceleration data measured by the bogie vibration acceleration sensor 6 and the carbody vibration acceleration sensor 7. In this case, the health diagnosis device 5 is configured to read and acquire the vibration acceleration data from the vibration acceleration database.

[0038] In this way, the health diagnosis system 100 constructs its own vibration acceleration database, but the health diagnosis device 5 may also use a vibration acceleration database constructed in the vehicle information integration system 10 installed in the railway vehicle 1.

[0039] The functions performed by the components described herein may be implemented in circuitry or processing circuitry, including general-purpose processors, application-specific processors, integrated circuits, ASICs (Application Specific Integrated Circuits), CPUs (Central Processing Units), conventional circuits, and / or combinations thereof, programmed to perform the described functions. Processors include transistors and other circuits and are considered circuitry or processing circuitry. A processor may also be a programmed processor that executes a program stored in memory. In this specification, a circuit, unit, or means is hardware that is programmed to perform or executes the described functions. The hardware may be any hardware disclosed herein or any hardware known to be programmed to perform or execute the described functions. When the hardware is a processor, which is considered a type of circuitry, the circuit, means, or unit is a combination of hardware and software used to configure the hardware and / or processor.

[0040] The foregoing discussion of the present disclosure has been presented for purposes of illustration and description and is not intended to limit the present disclosure to the form disclosed herein. For example, in the foregoing Detailed Description, various features of the present disclosure are grouped together in a single embodiment for the purpose of streamlining the disclosure. However, multiple features included in the present disclosure can be combined into alternative embodiments, configurations, or aspects other than those discussed above. [Explanation of symbols]

[0041] 1: Railway vehicles 2: Cart 3: Body 5: Health diagnostic device 6: Cart vibration acceleration sensor 7: Body vibration acceleration sensor 8: Diagnostic result output device 50: Memory 51: Processor 100: Health diagnostic system 505: Filter

Claims

1. A system for diagnosing the soundness of a railway vehicle after an earthquake, comprising: a health diagnosis device having at least one memory storing a predetermined program and at least one processor accessible to the memory; a diagnostic result output device that is communicably connected to the health diagnosis device and outputs a diagnostic result of the health diagnosis device, The soundness diagnosis device is configured, by the processor executing the program, to acquire vibration acceleration data of the railway vehicle for a predetermined diagnosis period between the time of an earthquake occurrence and the time of an emergency stop of the railway vehicle, determine the soundness of the railway vehicle to be poor when noise with a larger amplitude than others due to abnormalities such as breakage, cracks, or damage in components of the railway vehicle locally appears in the waveform of the vibration acceleration data, and determine the soundness of the railway vehicle to be good when no noise appears, and output the result of the determination to the diagnosis result output device as the diagnosis result. Railway vehicle health diagnostic system.

2. the soundness diagnosis device includes a filter that extracts the noise from the vibration acceleration data; The railway vehicle health diagnosis system according to claim 1 .

3. the soundness diagnosis device starts acquiring the vibration acceleration data in response to input of earthquake occurrence information; 3. The railway vehicle health diagnosis system according to claim 1 or 2.

4. at least one of a bogie vibration acceleration sensor mounted on a bogie of the railway vehicle and a carbody vibration acceleration sensor mounted on a carbody; a vibration acceleration database that stores vibration acceleration data measured by the bogie vibration acceleration sensor and the carbody vibration acceleration sensor, The health diagnosis device reads and acquires the vibration acceleration data from the vibration acceleration database. The railway vehicle health diagnosis system according to any one of claims 1 to 3.

5. 1. A method for diagnosing the health of a rail vehicle after an earthquake, executed by at least one processor, comprising: acquiring vibration acceleration data of the railway vehicle for a predetermined diagnostic target period between the time of the earthquake occurrence and the time of the emergency stop of the railway vehicle; When a noise having a larger amplitude than others due to an abnormality such as a break, crack, or damage of a component of the railway vehicle appears locally in the waveform of the vibration acceleration data, the soundness of the railway vehicle is judged to be poor, and when the noise does not appear, the soundness of the railway vehicle is judged to be good; and outputting a result of the determination as a diagnosis result of the soundness of the railway vehicle. A method for diagnosing the health of railway vehicles.

6. input of earthquake occurrence information as a trigger to start acquiring the vibration acceleration data; The railway vehicle health diagnosis method according to claim 5.

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