JP2022080902A - Abnormality detection method for pressure accumulation system in railway vehicle - Google Patents

Abstract

To provide an abnormality detection method which can detect the occurrence of an abnormality in a pressure accumulation system in a railway vehicle.SOLUTION: An abnormality detection method for a pressure accumulation system in a railway vehicle comprises: a first step of acquiring and storing operation information of a compressor, operation information of an air brake device, pressure information of a pressure accumulation system and variation information of an air spring collected by a data collection system mounted on a railway vehicle; a second step of extracting the operation period of the compressor longer than the prescribed time from the stored information; a third step of extracting the pressure information of the pressure accumulation system in a period where there is no operation of the air brake device and small variation of the air spring from the extracted operation periods of the compressor; a fourth step of calculating a temporary pressure drop amount in the middle of pressure rise of the pressure accumulation system on the basis of the extracted pressure information of the pressure accumulation system; a fifth step of determining whether or not the calculated pressure drop amount is larger than a prescribed value; and a sixth step of storing or outputting the determination result in a storage device.SELECTED DRAWING: Figure 4

Description

The present invention relates to a technique for detecting an abnormality in a pressure accumulator system including a compressor that generates compressed air used for an air brake or an air spring in a railroad vehicle, and particularly, an operation abnormality of a switching valve in a pressure accumulator system equipped with two dehumidifying cylinders. It relates to an abnormality detection method capable of detecting.

Railcars are equipped with a pressure accumulator system consisting of a compressor that generates compressed air used for air brakes and air springs, a dehumidifying device that dehumidifies compressed air, an air tank that stores compressed air, and a pressure regulator. .. In this accumulator system, when the pressure in the air tank drops below a predetermined value, the compressor is activated to compress the outside air and accumulate it in the air tank, and when the pressure in the air tank reaches the predetermined value, the compressor stops. Is designed to repeat. In this accumulator system, if a component such as a compressor deteriorates or fails due to long-term operation and the capacity is lowered due to the deterioration or failure, the operating time per operation may become long and the total power consumption may increase. Compressor failure is the most frequent cause of abnormality in the accumulator system of railway vehicles.

Therefore, the applicant has filed an invention for predicting the occurrence of an abnormality in a compressor for a railway vehicle (Patent Document 1).
The method for detecting an abnormality in a compressor for a railroad vehicle described in Patent Document 1 includes a step of receiving operation information of the compressor, pressure information of the accumulator system, etc. collected by a data collection system mounted on the vehicle, and collected. A step of extracting the pressure information of the accumulator system from the information during the time when the brake device is not operated and calculating the pressure increase amount of the accumulator system within a predetermined time, and a step of calculating the pressure displacement of the air spring within the predetermined time. A regression model formula is established by multiple regression analysis with the pressure displacement of the air spring, the occupancy rate, the outside air temperature, and the vehicle speed as explanatory variables, and the pressure rise amount of the accumulator system as the dependent variable, and the state of the compressor using the regression model formula. It is designed to include a step of performing a process of determining.

Japanese Unexamined Patent Publication No. 2018-13967 Japanese Unexamined Patent Publication No. 2018-001997

The abnormality detection method disclosed in Patent Document 1 predicts the occurrence of an abnormality. However, some abnormalities in the pressure accumulator system of railway vehicles are caused not only by the failure of the compressor but also by the failure of other components such as the dehumidifier and the pressure regulator.
Patent Document 2 describes an invention for determining an abnormality of the entire pressure accumulation system (air control system) of a railway vehicle. The abnormality determination method of the air control system described in Patent Document 2 is to acquire pressure values of various parts of the air control system and analyze the pressure value data by a statistical method to determine the abnormality. Therefore, it is necessary to newly install multiple pressure sensors in various parts of the air control system, which leads to cost increase and the problem that the amount of work for maintaining them increases as the number of sensors increases. be.

As a result of considering the cause of the abnormality in the accumulator system of the railway vehicle, the present inventors have found that in the accumulator system equipped with the two-cylinder dehumidifying device having two dehumidifying cylinders, the malfunction of the switching valve of the dehumidifying cylinder is caused. I found that there are relatively many. Each dehumidifying cylinder contains a dehumidifying agent, and since the dehumidifying agent needs to be dried and regenerated from time to time, a switching valve is provided so that the two dehumidifying cylinders can be used alternately. Patent Document 2 describes that an abnormality in the dehumidifier can be detected and air leakage due to a crack in a pipe as a specific example of the abnormality, but does not describe a malfunction of the switching valve as a cause of the abnormality.

The present invention has been made based on the above background, and provides an abnormality detection method capable of detecting the occurrence of an abnormality due to a malfunction of a switching valve of a dehumidifying cylinder in a pressure accumulating system of a railway vehicle. The purpose.
Another object of the present invention is to provide an abnormality detecting method capable of detecting the occurrence of an abnormality in a pressure accumulating system of a railway vehicle without newly installing a pressure sensor.

In order to solve the above problems, the method for detecting an abnormality in the accumulator system of a railway vehicle according to the present invention is
Operation information of the compressor and operation information of the air brake device collected by a data collection system mounted on a railway vehicle equipped with a compressor, a two-cylinder dehumidifier, an air tank, an air brake device, and a pressure accumulator system including an air spring. , The first step to acquire and store the pressure information of the accumulator system and the fluctuation information of the air spring,
From the stored information, the second step of extracting for each compressor the information whose operating period of the compressor is longer than the predetermined time,
From the operating period of the compressor extracted by the second step, the third step of extracting the pressure information of the accumulator system during the period when the air brake device is not operated and the fluctuation of the air spring is small,
Based on the pressure information of the accumulator system extracted by the third step, the fourth step of calculating the temporary pressure drop amount during the pressure rise of the accumulator system for each compressor, and
The fifth step of determining whether or not the pressure drop amount calculated by the fourth step is larger than the predetermined value, and
The sixth step of storing or outputting the determination result in the fifth step in the storage device is included.

According to the above method, the operation information of the compressor, the operation information of the air brake device, the pressure information of the accumulator system, and the operation information of the air spring are collected, and the operation of the air brake device and the operation of the air brake device for the compressor having the accumulator time longer than a predetermined value are collected. The operation of the air brake device and the operation of the air spring are performed in order to calculate the temporary pressure drop during the pressure rise of the accumulator during the period when the air spring is not activated and to determine the state of the accumulator based on the pressure drop. It is possible to accurately detect the occurrence of an abnormality due to a malfunction of the dehumidifying cylinder switching valve of the dehumidifying device by eliminating the influence of.

Here, preferably, in the first step, the operating current value information of the compressor motor is acquired together with the operating information of the compressor, the operating information of the air brake device, the pressure information of the accumulator system, and the fluctuation information of the air spring. ,
From the stored information, a step of determining a motor operation abnormality based on the operating current value of the compressor motor before the third step is provided.
In the third step, the pressure information of the accumulator system during the period in which the air brake device is not operated, the fluctuation of the air spring is small, and the motor operation is not abnormal from the operating period of the compressor extracted by the second step. To extract.

In the compressed air accumulator system of railway vehicles, the ratio of the operation abnormality of the compressor motor to the abnormality of the entire system is relatively large, so the operation abnormality of the motor is separate from the detection of the operation abnormality of the dehumidifying cylinder switching valve. It is desirable to detect. According to the above method, if the compressor motor has an operation abnormality and the accumulator time is long, it is the target of the processing of the 4th step to the 6th step for detecting the operation abnormality of the switching valve. Since it can be removed from the data processing device, the burden on the data processing device can be reduced.

Further, preferably, the operating period of the compressor in the second step is determined based on the operation start command signal of the compressor and the operation stop command signal of the compressor output from the pressure regulator provided in the air tank. do.
According to such a method, the pressure data of the accumulator system during the operating period of the compressor can be easily extracted.

Further, preferably, the pressure information of the accumulator system is a pressure value detected by a pressure sensor provided for supplying the pressure information of the accumulator system to the controller of the air brake device.
In the existing system, a pressure sensor is provided in the brake control unit, and according to the above method, it is possible to determine the presence or absence of an abnormality based on the pressure value of the existing pressure sensor. Therefore, it is possible to detect the occurrence of an abnormality in the accumulator system of a railway vehicle without installing a new pressure sensor.

Further, preferably, the data collection system includes a data transmission device for transmitting the collected data by wireless communication, and the processes of the first step to the sixth step are data for receiving the data transmitted from the data transmission device. It is to be executed by the data processing device of the ground-side device provided with a receiving device, a storage device for storing received data, and a data processing device.
According to such a method, since the burden on the data processing device mounted on the vehicle can be reduced, it is not necessary to mount the high-performance data processing device on the vehicle, and the cost associated with the adoption of the abnormality detection method according to the present invention. Up can be suppressed.

According to the present invention, in the accumulator system of a railway vehicle, it is possible to detect the occurrence of an abnormality due to a malfunction of the switching valve of the dehumidifying cylinder. In addition, there is an effect that it is possible to detect the occurrence of an abnormality in the accumulator system of a railway vehicle without installing a new pressure sensor.

A block diagram showing a schematic configuration of a system for collecting data necessary for implementing an abnormality detection method for an accumulator system in a railroad vehicle according to the present invention and a data processing device for executing abnormality detection processing based on the collected data. Is. It is a block diagram which shows the structure of the two-cylinder dehumidifying device which constitutes the accumulator system mounted on a railroad vehicle. It is a graph which shows the change of MR pressure in one operation period of a compressor in the accumulator system mounted on a railroad vehicle. It is a flowchart which shows an example of the procedure of the abnormality detection processing of the accumulator system in one Embodiment of this invention.

Hereinafter, an embodiment of a method for detecting an abnormality in a pressure accumulator system in a railway vehicle according to the present invention will be described with reference to the drawings.
The abnormality detection method according to the present invention for detecting an abnormality in the accumulator system that generates and accumulates compressed air used for an air brake or an air spring is a pressure accumulator system (compressor) collected in an operating (running and maintenance) train. Based on the pressure data of the dehumidifying device, air tank, air brake, and air spring), the state of the accumulator system is grasped, and the occurrence of an abnormality in the switching valve of the dehumidifying cylinder is detected at the initial stage. Therefore, the configuration of the data collection system required for abnormality detection and the abnormality detection device for determining and notifying the state of the accumulator system based on the data collected by the system will be described first with reference to FIG. 1.

FIG. 1 shows an outline of a system 10 that collects data from an operating train and an abnormality detection device 20 that detects an abnormality in a pressure accumulator system (a switching valve of a dehumidifying cylinder) based on the collected data.
As shown in FIG. 1, each vehicle A, B, C ... of one train is equipped with a compressor 11, an air tank 12, and a brake controller 13 at a rate of one in several cars. (Vehicle B in the figure) is connected. Further, although not shown, each vehicle is provided with air springs 14 for receiving compressed air from the accumulator system at a total of four locations in the front, rear, left and right, and the air springs 14 are provided according to the occupancy rate and the load difference between the left and right. It is configured to adjust the air pressure. The air spring 14 is provided with a displacement sensor or a pressure sensor as a load meter for measuring the weight of the vehicle.

Further, the air tanks 12 provided in a plurality of vehicles constituting one train are connected to each other by a pipe called an MR pipe (not shown), and an air spring of each vehicle is connected to the pipe. A pressure regulator is provided in the air tank 12, and the pressure regulator outputs a signal instructing the operation of the compressor 11 when the pressure of the accumulator system drops below a predetermined value, and the pressure in the air tank 12 rises. When a predetermined value is reached, a signal for stopping the operation of the compressor 11 is output to control the compressor 11. The brake controller 13 is provided with a pressure sensor for detecting the pressure of the compressed air in the MR tube.

The data collection system 10 in the present embodiment uses the data transmission path 15 provided in the train to output data from the pressure sensor of the brake controller 13 and the sensor of the air spring 14 of each vehicle from the pressure regulator to the compressor 11. It is configured to be able to collect operation instruction signals. Each vehicle A, B, C ... Is provided with transmission terminal devices 16a, 16b, 16c ..., respectively, and these transmission terminal devices 16a, 16b, 16c ... Are connected by a data transmission path 15. The brake controller 13 is connected to the transmission terminal device (16b in the figure) of the vehicle. The sampling period of data and signals from each sensor may be, for example, 0.2 seconds. When the air spring 14 includes a solenoid valve, the control signal of the solenoid valve may be collected instead of the data of the sensor of the air spring 14.

The central terminal device 17 stores the data collected via the data transmission path 15 together with the electric vehicle identification information (car number information) in a recording device 18 provided with a storage device such as a hard disk or a semiconductor memory for wireless communication. The transmission unit 19 having a function is configured to periodically transmit the collected data to the abnormality detection device 20 on the ground side.
The recording device 18 stores the train identification information (organization number), and when the central terminal device 17 transmits the collected data, the train identification information is transmitted together with the collected data. The recording device 18 may be a server.

The abnormality detection device 20 of the accumulator system of the railway vehicle of the present embodiment has a data receiving unit 21 for receiving collected data and the like transmitted from the transmitting unit 19 of the data collecting system 10 on the upper side of the vehicle, and a hard disk for storing the received data. And a data storage unit 22 such as a semiconductor memory. Further, the abnormality detection device 20 determines the abnormality based on the drop amount calculation unit 23 that calculates the amount of pressure drop during compression by the compressor based on the received data (pressure value) and the calculated drop amount. It includes a determination processing unit 24, a result storage unit 25 for storing determination results, and an alert transmission unit 26 for transmitting alert (alarm) information to an external portable information terminal 30 or the like.

The functions of the drop amount calculation unit 23 and the determination processing unit 24 are a calculation device such as a CPU (microprocessor), a storage device such as a ROM or RAM, an input device such as a keyboard, and an output device such as a display device. It can be realized by a personal computer equipped with a personal computer and a program stored in the storage device. Since the hardware configuration itself of such a personal computer is known, the illustration thereof will be omitted.

FIG. 2 shows a configuration of an effective accumulator system by applying the method for detecting an abnormality in the accumulator system of the present invention.
As shown in FIG. 2, the accumulator system to which the abnormality detection method of the accumulator system of the present invention is applied is a compressor (air compressor) 11, an air tank (air reservoir) 12, a dehumidifying device 31, and a compressor 11. The MR tube 33 is connected to the air tank 12 with a controller 32 for controlling the air tank 12. A signal is output to the air tank 12 to start the operation of the compressor 11 when the pressure in the tank drops below a predetermined value, and a signal to stop the compressor 11 is output when the pressure in the air tank 12 reaches a predetermined value. A compressor 34 is provided.

The dehumidifying device 31 is a two-cylinder dehumidifying device, and is a pair of a cooler CL whose inlet is connected to the discharge port of the compressor 11, a drain valve DV connected to the outlet of the cooler CL, and a pair connected to the outlet of the drain valve DV. Dehumidifying cylinders DR1 and DR2 connected to the outlets of the switching valves MV1 and MV2, switching valves MV1 and MV2, respectively, and check valves CV1 and CV2 connected to the outlets of the dehumidifying cylinders DR1 and DR2. It is composed of a throttle NV or the like provided between the upstream sides of the valves CV1 and CV2.
The switching valves MV1 and MV2 have an exhaust position b that opens the outlet to the atmosphere and closes the inflow port when degaussing (OFF), and closes the exhaust port and communicates the inflow port to the outlet when exciting (ON). The supply position a is provided.

When the switching valve MV1 is turned on and the switching valve MV2 is turned off, the moist air from the compressor 11 is supplied to one of the dehumidifying cylinders DR1 via the cooler CL, the drain valve DV, and the switching valve MV1, and the adsorbent in the dehumidifying cylinder DR1. After being dehumidified and dried by, it reaches the air tank 12 via the check valve CV1. At this time, a part of the dry air flows back from the outlet of the other dehumidifying cylinder DR2 to the inlet through the throttle NV, and the adsorbent in the dehumidifying cylinder DR2 is dried and regenerated to become moist air and becomes the electromagnetic valve MV2. It is discharged through the exhaust position b of. On the other hand, when the switching valve MV1 is turned on and the switching valve MV2 is turned on, contrary to the above, the dehumidifying cylinder DR2 dehumidifies and dries the moist air, and the dehumidifying cylinder DR1 regenerates the adsorbent. The switching control signals of the switching valves MV1 and MV2 output from the controller 32 of the dehumidifying device 31 may be collected.

Next, the details of the abnormality detection determination process by the pressure accumulator abnormality detection device 20 will be described with reference to the graph of FIG. 3 and the flowchart of FIG.
As described above, in the two-cylinder dehumidifying device, a part of compressed air is discharged from the switching valve of the dehumidifying cylinder on the regeneration side when the switching valves MV1 and MV2 are switched. The present inventors increase the switching discharge amount when the switching valves MV1 and MV2 deteriorate, and the time required for the compressor to raise the air in the air tank to a predetermined pressure (this is referred to as a pressure accumulating time in the present specification). ) That is, the change in the drive start time and stop time of the compressor and the value of the pressure sensor was recorded in the vehicle during commercial operation, predicting that the operating time of the compressor per operation would be long.

As a result, when the compressor is started, the pressure of the air in the air tank gradually rises, and the pressure rise stops at the timing when the switching valves MV1 and MV2 of the dehumidifying device 31 are switched during the compression, and after a while, the pressure rises again. It turned out to rise gradually. Further, FIG. 3 shows an abnormality in which an abnormality was observed during the change in pressure. In the graph shown in FIG. 3, it can be seen that the pressure drops at the timing when the switching valves MV1 and MV2 are switched. Therefore, when the dehumidifying device in which the change in pressure was found to be abnormal was inspected, it was found that air was leaking from the switching valve, that is, the switching valve was defective. From this, it was found that when the amount of pressure drop during the operation of the compressor exceeds a predetermined amount, it can be determined that there is an abnormality in the switching valve.

Based on the above findings, the present inventors have developed an abnormality detection device 20 as shown in FIG. 1 and an abnormality detection method executed by the abnormality detection device 20. FIG. 4 shows an example of the abnormality determination processing procedure executed by the data processing unit (23, 24) of the abnormality detection device 20.
When the abnormality detection determination process of FIG. 4 is started, the determination process unit 24 first calculates the pressure accumulation time per operation of the compressor from the collected data stored in the data storage unit 22 (step). S1). Specifically, the time t1 when the pressure regulator output, which is a command to start the operation of the compressor, changes to "1" and the time t2 when the pressure regulator output changes to "0" indicating the stop of operation are read, and the equation (t2) is read. -Calculate the accumulator time from t1).

Next, it is determined whether or not the accumulation time calculated in step S1 is larger than the preset predetermined time (step S2). Here, if it is determined that the accumulation time is smaller than the predetermined time (No), the process returns to step S1 and the accumulation time when the compressor operates next is calculated.
On the other hand, if it is determined in step S2 that the accumulation time is longer than the predetermined time (Yes), the process proceeds to step S3, and the operation information of the air brake and the information of the air spring (displacement sensor or pressure) during the corresponding compressor operation period. The value of the sensor) is read from the data storage unit 22. Then, it is determined whether or not the air brake is operated or the air spring is operated during the operating period of the compressor of interest (step S4). Since the air spring operates frequently as the occupancy rate fluctuates and the pressure and displacement amount fluctuate, the air spring does not operate when the occupancy rate fluctuation during compressor operation is small to some extent (for example, 5% or less). It may be regarded as.

If it is determined in step S4 that the air brake is operating or the air spring is operating (Yes) during the compressor operating period, the process returns to step S1 and the accumulation time when the compressor is operated next is calculated. On the other hand, if it is determined in step S4 that neither the air brake nor the air spring is operated (No), the process proceeds to step S5, and the detection value of the pressure sensor that detects the pressure of the compressed air during the operating period of the compressor of interest ( MR pressure value) is read. Then, it is determined whether or not the detected value of the pressure sensor during compression has a drop of a predetermined value or more (step S6).

If it is determined in step S6 that there is no drop in the MR pressure value (No), the determination result indicating that the accumulator system is normal is stored in the result storage unit 25 (step S10). On the other hand, if it is determined in step S6 that there is a drop in the MR pressure value (Yes), the process proceeds to step S7 to calculate a temporary pressure drop in the MR pressure value (ΔP in FIG. 3). Subsequently, it is determined whether or not the pressure drop amount is larger than a preset predetermined value (step S8). When the amount of drop in the MR pressure value is smaller than the predetermined value (No), the determination result indicating that the accumulator system is normal is stored in the result storage unit 25 (step S10). The "predetermined value" in step S8 can be determined by statistically processing the past acquired data.

On the other hand, if it is determined in step S8 that the amount of drop in the MR pressure value is larger than the predetermined value (Yes), the process proceeds to step S9, and the determination result indicating that the accumulator system is abnormal is stored in the result storage unit 25. .. Further, at this time, an alert may be sent (or an alarm is issued).
After that, it is determined whether or not the determination is completed for all the compressors in one organization (step S11), and if it is determined that the determination is not completed for one organization (No), the process returns to step S1 and then the compressor is stepped. The processes of S1 to S10 are executed. Further, in step S11, if it is determined that the determination for one organization is completed (Yes), the process is terminated.

In the pressure accumulator abnormality detection system of the present embodiment, the central terminal device 17 periodically collects the operating current value of the compressor 11, stores it in the storage device 18, and transmits it to the abnormality detection device 20 on the ground side. , The abnormality of the compressor 11 is detected based on the operating current value data received by the determination processing unit 24. Therefore, when it is determined in step S2 that the accumulator time is longer than the predetermined value, it is determined whether or not there is an abnormality in the compressor 11 based on the operating current value, and when the compressor is normal, the process proceeds to step S3. You may try to do it.

Further, instead of detecting and collecting the operating current value of the compressor 11, the output current value of the SIV (inverter) is detected and collected, and the current value of the period other than the operating period of the heater or the air conditioner is obtained from the current value. , It may be extracted as the operating current value of the compressor 11 and it may be determined whether or not there is an abnormality in the compressor 11 based on the extracted operating current value.
By excluding those whose accumulator time is long due to the operation abnormality of the compressor motor from the processing target for detecting the operation abnormality of the switching valve, the CPU of the abnormality detection device 20 including the data processing device The burden can be reduced.

As described above, in the above embodiment, since it is possible to detect an abnormality in the pressure accumulator system due to a defect in the switching valves MV1 and MV2 of the dehumidifying device 31 based on the MR pressure value, the dehumidifying device 31 has a flow meter. There is no need to provide. Further, since the MR pressure value can be obtained from the pressure sensor originally provided in the brake controller 13, there is an advantage that it is not necessary to newly provide a pressure sensor. However, it is also possible to obtain the MR pressure value by providing a pressure sensor in the middle of the air tank or the MR pipe.

In the above embodiment, it has been described that all the steps S1 to S11 of the abnormality detection process shown in FIG. 4 are executed by the abnormality detection device 20 on the ground side, but the processes of steps S1 to S3 are performed by the central terminal mounted on the vehicle. The data executed by the device 17 or the like and stored in the recording device 18 may be transmitted to the ground-side device (20), and the ground-side device (20) may execute the processes of steps S4 to S11. Further, it is also possible to execute all the processes of steps S1 to S11 by the device on the vehicle side.

Although the invention made by the present inventor has been specifically described above based on the embodiment, the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the accumulator time is longer than the average time, and the one with no braking operation during compression and the one with less fluctuation of the air spring is extracted, and the switching valve of the dehumidifying device is extracted. When the amount of pressure drop of the compressed air at the switching timing of is greater than or equal to the predetermined value, it is judged that the switching valve is defective. Data without brake operation or pressure fluctuation of the air spring is extracted from the inside at the switching timing of the switching valve, the amount of pressure drop during compression by the compressor is calculated, and if it is above the specified value, the switching valve is defective. You may decide that it is.

Further, in the above embodiment, the case where the present invention is applied to the detection of an operation abnormality due to a defect of the switching valve of the dehumidifying device constituting the accumulator system of the air compressed by the compressor has been described. It can also be used when it is desired to detect an air leak in the middle of a pipe that sends compressed air.

10 Data collection system 11 Compressor 12 Air tank 13 Brake controller 14 Air spring 15 Data transmission line 16A, 16B, 16C Transmission terminal device 17 Central terminal device 18 Recording device 19 Transmission unit 20 Ground side device (abnormality detection system)
21 Data receiving unit 22 Data storage unit 23 Pressure drop amount calculation unit 24 Judgment processing unit 25 Result storage unit 26 Alert transmission unit 31 Dehumidifying device 33 MR tube 34 Pressure regulator DR1, DR2 Dehumidifying cylinder MV1, MV2 Dehumidifying cylinder switching valve

Claims (5)

Operation information of the compressor and operation information of the air brake device collected by a data collection system mounted on a railway vehicle equipped with a compressor, a two-cylinder dehumidifier, an air tank, an air brake device, and a pressure accumulator system including an air spring. , The first step to acquire and store the pressure information of the accumulator system and the fluctuation information of the air spring,
From the stored information, the second step of extracting for each compressor the information whose operating period of the compressor is longer than the predetermined time,
From the operating period of the compressor extracted by the second step, the third step of extracting the pressure information of the accumulator system during the period when the air brake device is not operated and the fluctuation of the air spring is small,
Based on the pressure information of the accumulator system extracted by the third step, the fourth step of calculating the temporary pressure drop amount during the pressure rise of the accumulator system for each compressor, and
The fifth step of determining whether or not the pressure drop amount calculated by the fourth step is larger than the predetermined value, and
A method for detecting an abnormality in a pressure accumulator system in a railway vehicle, which comprises a sixth step of storing or outputting a determination result in the fifth step in a storage device. In the first step, the operating current value information of the compressor motor is acquired together with the operating information of the compressor, the operating information of the air brake device, the pressure information of the accumulator system, and the fluctuation information of the air spring.
From the stored information, a step of determining a motor operation abnormality based on the operating current value of the compressor motor before the third step is provided.
In the third step, the pressure information of the accumulator system during the period in which the air brake device is not operated, the fluctuation of the air spring is small, and the motor operation is not abnormal from the operating period of the compressor extracted by the second step. The method for detecting an abnormality in a pressure accumulator system in a railroad vehicle according to claim 1, wherein the method is characterized by extracting. The claim is characterized in that the operating period of the compressor in the second step is determined based on the operation start command signal of the compressor and the operation stop command signal of the compressor output from the pressure regulator provided in the air tank. The method for detecting an abnormality in a pressure accumulator system in a railway vehicle according to 1 or 2. The pressure information of the accumulator system is a pressure value detected by a pressure sensor provided for supplying the pressure information of the accumulator system to the controller of the air brake device, according to claims 1 to 3. The method for detecting an abnormality in the pressure accumulator system in a railroad vehicle described in any one of them. The data collection system includes a data transmission device that transmits the collected data by wireless communication, and the processes of the first step to the sixth step are a data reception device that receives the data transmitted from the data transmission device. The method for detecting an abnormality in a pressure accumulator system in a railroad vehicle according to any one of claims 1 to 4, wherein the data processing device is executed by the data processing device of a ground-side device including a storage device for storing data and a data processing device. ..

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