JP2016055840A - Bearing abnormality detection device for railway vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing abnormality detection device for railway vehicle which can correctly perform abnormality determination on a bearing for railway vehicle.SOLUTION: A bearing abnormality detection device for railway vehicle for detecting abnormalities of a plurality of rolling bearings incorporated in an axle box provided in a carriage comprises: a vibration detection unit 15 which detects vibration of each rolling bearing; an analysis unit 6 which determines abnormalities of the rolling bearings from detection data detected by the vibration detection unit 15; reception response detection start means 13 which receives a detection start signal and makes the vibration detection unit 15 detect vibration of the rolling bearings; and a measurement start command transmission unit 4 which is provided at a place apart from the railway vehicle and transmits a detection start signal to the reception response detection start means 13.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a railway vehicle bearing abnormality detection device that detects an abnormality of an axle bearing in a railway vehicle.

  In a railway vehicle, when an abnormality occurs in an axle bearing, it is necessary to take a measure such as stopping the operation of the vehicle, resulting in a great loss. Therefore, a bearing device with a railcar sensor that detects various operating elements of a rolling device by attaching various detecting elements to the bearing device has been proposed (Patent Document 1).

Japanese Patent No. 4529602

  In the vibration detection of the bearing by the bearing device with a sensor for a rail vehicle, disturbance vibration generated at the time of passing through the joint of the wheel rail and the point portion when the vehicle travels is detected together with the vibration waveform caused by the abnormality of the bearing. There is a problem that the bearing abnormality cannot be accurately determined.

  An object of the present invention is to provide a railway vehicle bearing abnormality detecting device capable of accurately determining abnormality of a railway vehicle bearing.

The bearing abnormality detecting device for a railway vehicle according to the present invention is a bearing abnormality detecting device for a railway vehicle that detects an abnormality of a plurality of rolling bearings 17 incorporated in a axle box 3 provided on a carriage 2 of the railway vehicle 1.
A vibration detecting device 15 for detecting vibration of each of the rolling bearings 17;
An analysis device 6 for judging an abnormality of the rolling bearing 17 from detection data detected by the vibration detection device 15;
A reception response detection start means 13 for receiving a detection start signal and causing the vibration detection device 15 to detect the vibration of the rolling bearing 17;
It has a measurement start command transmission device 4 provided at a location distant from the railway vehicle 1 and transmitting the detection start signal to the reception response detection start means 13.

  According to this configuration, the measurement start command transmission device 4 transmits a detection start signal to the reception response detection start means 13. The reception response detection start means 13 receives the detection start signal and causes the vibration detection device 15 to detect the vibration of the rolling bearing 17. The analysis device 6 determines the abnormality of the rolling bearing 17 from the detection data detected by the vibration detection device 15.

A measurement start command transmission device 4 is provided at a location away from the railway vehicle 1. For example, the measurement start command transmitting device 4 is located at a position along the traveling rail 20 and from a point portion or a joint of the traveling rail 20 (which may be collectively referred to as “seam etc.”) in the rail longitudinal direction. Install in a position away from Thereby, the reception response detection start means 13 receives the detection start signal from the measurement start command transmission device 4 at a timing avoiding the joint and the like, and causes the vibration detection device 15 to detect the vibration of the rolling bearing 17.
The vibration detection device 15 detects vibration by avoiding joints and the like, so that no extra vibration waveform other than the vibration waveform due to the bearing abnormality appears, and therefore the detection data that is the vibration waveform due to the bearing abnormality is clear. Become. Accordingly, it is possible to accurately determine the abnormality of the bearing 17 for the railway vehicle by excluding the vibration waveform caused by passing through the joint or the like of the traveling rail 20.

The measurement start command transmission device 4 may be installed at a position that is separated from a joint or a point portion of the traveling rail 20 that travels the railcar 1 in the rail longitudinal direction.
The determined distance is determined by the result of a test or simulation.
In this case, the reception response detection start means 13 detects from the measurement start command transmission device 4 before or after the rail car 1 travels along the traveling rail 20 and the axle box 3 subject to vibration detection passes through the joint or the like. The start signal is received, and the vibration detection device 15 is caused to detect the vibration of the rolling bearing 17. Therefore, only the vibration of the rolling bearing 17 can be reliably detected by the vibration detection device 15.

  A plurality of the reception response detection start means 13 are provided for each of the axle boxes 3 to be subjected to vibration detection, and the reception response detection start means 13 that has received the detection start signal is a reception response detection provided to a subsequent vibration detection target. It may have a function of sequentially transmitting detection start signals to the start means 13. In this case, the person in charge of measurement can omit the operation process for each reception response detection start means 13 corresponding to the subsequent vibration detection target by installing a measurement start command transmission device and turning on the power. Therefore, the operability can be simplified.

  When there are a plurality of joints or point portions of the traveling rail 20, the measurement start command transmitting device 4 may be installed corresponding to the number. In this case, a measurement time lag (time required for transmission) due to the transmission time between the reception response detection start means 13 (slave unit) and the reception response detection start unit 13 (slave unit) provided in the subsequent vibration detection target. (Delay) can be reduced. At the same time, the measurement time lag between the slave units can be made constant. For example, it is not necessary to set a delay time for avoiding a joint of the traveling rail 20 at the measurement timing of the subsequent slave unit.

The measurement start command transmitting device 4 may be installed in a vehicle base that travels and inspects the railway vehicle 1.
The condition for detecting the vibration of each rolling bearing 17 is that the drive motor for driving the railway vehicle 1 is in a non-energized state and the speed of the railway vehicle 1 is 25 km / h or more and 35 km / h or less. good. In this case, for example, after the railway vehicle 1 is set to a constant vehicle speed by a drive motor, the drive motor is deenergized and the railway vehicle 1 is caused to travel with inertial force. Thereafter, the vibration of the rolling bearing 17 is detected. Therefore, when detecting the vibration of the rolling bearing 17, harmful noise due to electromagnetic waves from the drive motor is reduced.

  A railroad vehicle bearing abnormality detecting device according to the present invention is a railcar bearing abnormality detecting device that detects abnormalities of a plurality of rolling bearings incorporated in a shaft box provided on a bogie of a railcar, wherein the vibration of each rolling bearing is detected. A vibration detection device that detects the abnormality of the rolling bearing from detection data detected by the vibration detection device, and a detection start signal received by the vibration detection device to detect the vibration of the rolling bearing. And a measurement start command transmission device that is provided at a location away from the railcar and transmits the detection start signal to the reception response detection start unit. For this reason, the abnormality determination of the bearing for rail vehicles can be performed correctly.

It is a figure which shows the example of installation of the bearing abnormality detection apparatus for rail vehicles which concerns on embodiment of this invention. It is a perspective view which shows the external appearance of the same bearing abnormality detection apparatus. It is a block diagram of a control system of the bearing abnormality detection device. It is a figure which shows the example of attachment of the measurement start command transmission / reception apparatus and vibration detection apparatus of the same bearing abnormality detection apparatus. It is an AA line end view of FIG. It is a circuit diagram which shows roughly the structure of the processing circuit of the same bearing abnormality detection apparatus. It is a figure which shows the example of a vibration measurement by the same bearing abnormality detection apparatus. It is a figure which shows the example of a vibration measurement by the bearing abnormality detection apparatus which concerns on other embodiment of this invention.

  A railway vehicle bearing abnormality detection device according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, this bearing abnormality detection device is a device that detects an abnormality in a plurality of rolling bearings incorporated in a axle box 3 provided in a carriage 2 of a railway vehicle 1. As the railway vehicle 1, for example, various railway vehicles such as a Shinkansen are applied. The bearing abnormality detection device detects the vibration of the bearing from the outside without having to take out the bearing from the axle box 3 when, for example, inspecting the bearing or the like at the vehicle station during vehicle inspection.

  FIG. 2 is a perspective view showing the appearance of the bearing abnormality detection device. As shown in FIGS. 1 and 2, the bearing abnormality detection device includes a measurement start command transmission device (master device) 4, a slave device set 5, and an analysis device 6. The measurement start command transmission device 4 is installed at a location distant from the railway vehicle 1, for example, in the vicinity of the traveling rail 20. A plurality of handset sets 5 are provided for each axle box 3 for vibration detection. The plurality of handset sets 5 are detachably provided on a part of the railway vehicle 1 as will be described later.

  The measurement start command transmission device 4 transmits a detection start signal to the measurement start command transmission / reception device (reception response detection start means) 13 in the handset set 5. The measurement start command transmitting device 4 is installed in the vicinity of the traveling rail 20 at a position away from the joint by a predetermined distance in the rail longitudinal direction. The slave unit set 5 can receive the detection start signal when the slave unit set 5 installed in the axle box 3 that is the object of vibration detection approaches the measurement start command transmission device 4 at the position separated by the predetermined distance. The position is such that disturbance vibrations generated when the seam or the like passes can be excluded in advance. The measurement start command transmission device 4 transmits a detection start signal to the slave unit set 5 by causing the railway vehicle 1 to travel along the traveling rail 20 with the power supply of the measurement start command transmission device 4 turned on.

FIG. 3 is a block diagram of a control system of the bearing abnormality detection device.
The measurement start command transmission device 4 includes a power supply 7, a power supply circuit 8, a communication circuit 9, a communication module 10, and an antenna 11. The power supply voltage supplied from the power supply 7 is changed to a desired voltage by the power supply circuit 8 and supplied to the communication circuit 9, the communication module 10, and the antenna 11 in the subsequent stage. The detection start signal is converted into an electromagnetic wave having a frequency determined by the communication circuit 9 and transmitted to the measurement start command transmission / reception device 13 of the handset set 5 via the communication module 10 and the antenna 11. For example, when the ZigBee module is used as the communication module 10, the power consumption can be reduced.

  Each cordless handset set 5 includes a vibration detection device 15 and a measurement start command transmission / reception device (reception response detection start means) 13. These vibration detection device 15 and measurement start command transmission / reception device 13 are electrically connected via an electric wire 16.

  FIG. 4 is a diagram showing an example of attachment of the measurement start command transmission / reception device 13 and the vibration detection device 15 of the bearing abnormality detection device. FIG. 5 is an end view taken along line AA of FIG. FIG. 5 is an enlarged view of the vicinity of the wheel 19 of the leading vehicle in FIG. As shown in FIGS. 1, 4, and 5, the vibration detection device 15 detects vibration of the rolling bearing 17. A pair of axle boxes 3 are provided at a lower portion of the carriage 2 in the vehicle width direction, and rolling bearings 17 are incorporated in the axle boxes 3 respectively. Two axles 18 are provided in parallel to one carriage 2. For example, a plurality of rolling bearings 17 are incorporated into one axle box 3 at a predetermined interval. As the rolling bearing 17, for example, a ball bearing, a cylindrical roller bearing, a tapered roller bearing or the like is applied.

  The outer ring of the rolling bearing 17 is fitted to the inner peripheral surface of each axle box 3, and the axle 18 is fitted to the inner ring of the rolling bearing 17. Wheels 19 are attached to both ends of the axle 18 in the axial direction, and these wheels 19 are rotatably supported by rolling bearings 17 so as to be able to travel on two rails 20 laid in parallel on the track. The A bolt 21 made of a magnetic material is fastened to the axle box 3. For example, a hexagonal bolt is applied as the bolt 21. The permanent magnet 12 of the vibration detecting device 15 can be attracted and fixed to the head surface of the hexagon bolt exposed from the axle box 3.

  As shown in FIG. 3, the vibration detection device 15 includes, for example, a case (not shown), a vibration detection element 23, a processing circuit 24, a permanent magnet 12 (FIG. 4), a power supply circuit 25, and a recording unit. 40 and a recording medium 22. For example, a processing circuit 24 mounted on a printed circuit board is accommodated in the case. The processing circuit 24 has a plurality of electronic components and is soldered to one side or both sides of the printed circuit board. As the printed circuit board, for example, a highly rigid glass-filled epoxy resin is desirable.

  A vibration detection element 23 for detecting the operating state of the rolling bearing 17 and a holder made of a magnetic material are attached to one end in the axial direction of the case. As the vibration detection element 23, for example, a piezoelectric acceleration sensor is applied. A wide range of vibrations can be detected by using the piezoelectric vibration detecting element 23. Inside the case, a lead wire is connected from a lead terminal of the vibration detecting element 23 to a connection terminal provided in the processing circuit 24.

  As shown in FIG. 4, a permanent magnet 12 is provided at the tip of the holder, and the permanent magnet 12 is attracted and fixed to the head surface of the bolt 21 in the axle box 3. Therefore, the vibration detection device 15 is detachably attached to the head surface of the bolt 21 by the permanent magnet 12. The plurality of vibration detection devices 15 are preferably attached above or below the axle box 3.

FIG. 6 is a circuit diagram schematically showing the configuration of the processing circuit 24 of the vibration detecting apparatus.
The processing circuit 24 includes an operational amplifier circuit 26, a filter circuit 27, a microcomputer 28, and a reference voltage circuit 29. The output signal of the vibration detecting element 23 is generally input from the operational amplifier circuit 26 to the microcomputer 28 via the filter circuit 27. The filter circuit 27 constitutes a bandpass filter that sets a certain frequency band in order to extract frequencies before and after the bearing natural frequency. A combination of a high-pass filter and a low-pass filter may be used.

  The microcomputer 28 is normally in a sleep state, and is preferably activated when it is received. The analog output signal of the acceleration sensor which is the vibration detecting element 23 is A / D converted inside the microcomputer 28 and then recorded in the recording means 40 as shown in FIG. Thereafter, data is transferred from the recording means 40 to the recording medium 22. As the recording means 40, for example, a random access memory (abbreviated as RAM: Random Access Memory) capable of rewriting data is applied. By using a micro SD card as the recording medium 22, for example, the vibration detecting device 15 can be made compact.

  As shown in FIG. 6, a power supply voltage is supplied to the vibration detection element 23 and the processing circuit 24. The power supply voltage is a desired voltage. Power supply bypass capacitors C1 to C4 are connected to the vibration detection element 23 and the processing circuit 24. The power supply bypass capacitors C1 to C4 are connected between the power supply line L1 and the GND line L2 for the purpose of supplying a stable power supply voltage by bypassing noise superimposed on the DC power supply and suppressing the fluctuation of the power supply voltage. The

  A power supply bypass capacitor C1 is connected between the power supply line L1 and the GND line L2 of the vibration detecting element 23. The power supply bypass capacitor C1 supplies a stable power supply voltage to the vibration detecting element 23, and suppresses fluctuations in the supplied power supply voltage. An analog output signal from the vibration detection element 23 is input to one input terminal of the operational amplifier 31 in the operational amplifier circuit 26 via the resistor 30.

  A power supply bypass capacitor C2 is connected between the power supply line L1 and the GND line L2 of the operational amplifier 31. The power supply bypass capacitor C2 supplies a stable power supply voltage with noise bypassed to the operational amplifier circuit 26, and suppresses fluctuations in the supplied power supply voltage. An output signal from the operational amplifier 31 is input to the other input terminal via a capacitor 32 and a resistor 33 connected in parallel to the capacitor 32. The operational amplifier 31 amplifies and outputs a difference between inputs (inverted input and non-inverted input) to two input terminals.

  The amplified output signal is input to one input terminal of the operational amplifier 36 in the filter circuit 27 via the resistors 34 and 35 connected in series. A power supply bypass capacitor C3 is connected between the power supply line L1 and the GND line L2 of the operational amplifier 36. The power supply bypass capacitor C3 supplies a stable power supply voltage with noise bypassed to the filter circuit 27, and suppresses fluctuations in the supplied power supply voltage. The output signal from the operational amplifier 36 is input to the other input terminal and is fed back between the resistors 34 and 35 via the capacitor 37.

  The filter circuit 27 extracts only a predetermined frequency band corresponding to the natural vibration of the bearing and removes an unnecessary frequency band. During normal operation of the bearing, natural vibrations of the bearing occur as the rolling element passes through.However, if an abnormality occurs on the rolling surface of the bearing, vibration occurs at the passing period of the rolling element according to the bearing rotation speed. Peaks are superimposed. Therefore, by removing or attenuating frequency components other than the natural vibration component of the bearing by the filter circuit 27 with respect to the output signal from the operational amplifier circuit 26, the frequency component at the time of abnormality can be accurately extracted. The bearing rotational speed is determined so as to correspond to the rotational speed of the drive motor of the railway vehicle, for example.

  The analog output signal that has passed through the filter circuit 27 is input to the microcomputer 28 via the resistor 38 and the like. In the microcomputer 28, the analog output signal is temporarily recorded in the recording means 40 (FIG. 3) after A / D conversion. A reference voltage circuit 29 is connected to the microcomputer 28 so that an excessive voltage is not applied. A power supply bypass capacitor C4 is connected between the power supply line L1 and the GND line L2 of the reference voltage circuit 29. The power supply bypass capacitor C4 supplies a stable power supply voltage with noise bypassed to the reference voltage circuit 29, and suppresses fluctuations in the supplied power supply voltage.

As shown in FIG. 3, the measurement start command transmission / reception device (reception response detection start means) 13 in each slave unit set 5 includes a power supply 41, a power supply circuit 42, a communication circuit 43, a communication module 44, an antenna 14, and the like. Have The power supply voltage supplied from the power supply 41 is changed to a desired voltage by the power supply circuit 42 and supplied to the communication circuit 43, the communication module 44, and the antenna 14.
A detection start signal from the measurement start command transmission device 4 is received by the antenna 14 of the measurement start command transmission / reception device 13 and then transmitted to the vibration detection device 15 via the communication circuit 43 and the electric wire 16. As a result, the vibration detection device 15 can detect the vibration of the rolling bearing.

  FIG. 7 is a diagram showing an example of vibration measurement by the bearing abnormality detection device. In this example, one point portion Pt is provided in the travel range of the railway vehicle. When the railway vehicle 1 is inspected, the power of the measurement start command transmission device 4 and the plurality of measurement start command transmission / reception devices 13 are all turned on before the railway vehicle 1 travels at the vehicle station (vehicle base). Next, the axle box which is the first vibration detection target of the carriage 2 in the head vehicle is set as a vehicle speed (for example, 25 km / h or more and 35 km / h or less) determined by causing the railway vehicle 1 to travel along the traveling rail 20. The measurement start command transmission / reception device 15 (reception response detection start means 13 of the first slave unit set 5A) is installed in the vicinity of the travel rail 20 when passing the point portion Pa of the travel rail 20 before the measurement start command transmission / reception device 4. Receive the detection start signal.

  Thereby, the vibration detection device 15 (vibration detection device 15 of the first slave unit set 5A) connected to the measurement start command transmission / reception device 13 detects the vibration of the rolling bearing incorporated in the first axle box. Further, the measurement start command transmission / reception device 13 of the first slave unit set 5A transmits a radio wave of the detection start signal to the measurement start command transmission / reception device 13 of the second slave unit set 5B, and the vibration of the second slave unit set 5B. The detection device 15 detects the vibration of the rolling bearing incorporated in the axle box.

  Similarly, the measurement start command transmission / reception device 13 transmits a radio wave of a detection start signal to the measurement start command transmission / reception devices 13 of the following slave unit sets 5C, 5D, 5E, 5F, and is incorporated in a shaft box that is a vibration detection target. The vibrations of the rolling bearings detected are sequentially detected. After the railway vehicle 1 travels, the measurement start command transmission device 4 and the plurality of measurement start command transmission / reception devices 13 are turned off. As shown in FIG. 2, the detection data detected by each vibration detection device 15 is transferred to the recording medium 22, and then the analysis device 6 determines abnormality of each rolling bearing.

  According to the railway vehicle bearing abnormality detection device described above, the reception response detection start means 13 receives the detection start signal from the measurement start command transmission device 4 at a timing avoiding the joint and the like, and sends it to the vibration detection device 15. By detecting the vibration of the rolling bearing 17, an extra vibration waveform other than the vibration waveform due to the bearing abnormality does not appear, and therefore the detection data that is the vibration waveform due to the bearing abnormality is clarified.

  The analysis device 6 determines the abnormality of the rolling bearing 17 from such detection data. Accordingly, it is possible to accurately determine the abnormality of the bearing 17 for the railway vehicle by excluding the vibration waveform caused by passing through the joint or the like of the traveling rail 20.

  The measurement start command transmission / reception device 13 that has received the detection start signal has a function of sequentially transmitting the detection start signal to the measurement start command transmission / reception device 13 corresponding to the axle box 3 provided in the subsequent vibration detection target. The person in charge of measurement can omit the operation process for each measurement start command transmitting / receiving device 13 corresponding to the subsequent vibration detection target by installing the measurement start command transmitting device 4 and turning on the power. Therefore, the operability can be simplified. In addition, since the measurement start command transmission / reception device 13 automatically receives the radio wave of the detection start signal, the vibration measurement is started, so that variations in measurement conditions are reduced.

Another embodiment will be described.
In the following description, the same reference numerals are given to the portions corresponding to the matters described in the preceding forms in each embodiment, and the overlapping description is omitted. When only a part of the configuration is described, the other parts of the configuration are the same as those described in advance unless otherwise specified. The same effect is obtained from the same configuration. In addition to the combination of parts specifically described in each embodiment, the embodiments may be partially combined as long as the combination does not hinder the combination.

  FIG. 8 is a diagram illustrating an example of vibration measurement by a bearing abnormality detection device according to another embodiment. In this example, two point portions Pt are provided in the travel range of the railway vehicle 1 and one vehicle 1 enters between them. Corresponding to these two point portions Pt, first and second measurement start command transmitting devices 4A and 4B are installed. In this case, in the leading vehicle 1, the first measurement start command transmission device 4A → the first handset 5A → the second handset 5B → the third handset 5C → the fourth handset 5D It sets so that a detection start signal may be transmitted in order and measurement of each vibration detection target may be started.

  Further, the fifth handset 5E in the succeeding vehicle starts measurement of the vibration detection target when receiving the detection start signal from the second measurement start command transmission device 4B. Hereinafter, the fifth handset 5E is set to transmit a detection start signal to the sixth handset 5F. By setting in this way, the measurement time lag (time delay required for transmission) due to the transmission time between the slave sets can be reduced. At the same time, the measurement time lag between the slave sets can be made constant. For example, it is not necessary to set a delay time to avoid a seam or the like at the measurement timing of the subsequent slave unit set.

Although not shown, each measurement start command transmission / reception device 13 receives a detection start signal at a timing when the axle box of each vehicle carriage 2 passes through the vicinity of the measurement start command transmission devices 4A and 4B, respectively. Each vibration measurement may be started. Each of the handset sets 5A... 5F is set to start measurement only when receiving the radio wave of the detection start signal transmitted from the measurement start command transmitting devices 4A and 4B. The vehicle traveling speed is set to a predetermined vehicle speed when the first handset 5A receives the radio wave of the detection start signal from the measurement start command transmission device 4A.
In this case, it is not necessary to transmit the detection start signal radio wave from the slave unit set to the slave unit set, and vibration measurement of all axle boxes is performed at the same position. Hateful.

DESCRIPTION OF SYMBOLS 1 ... Railway vehicle 2 ... Bogie 3 ... Shaft box 4 ... Measurement start command transmission device 6 ... Analysis device 13 ... Measurement start command transmission / reception device (reception response detection start means)
15 ... Vibration detecting device 17 ... Rolling bearing 20 ... Running rail

Claims (6)

A railway vehicle bearing abnormality detection device that detects an abnormality of a plurality of rolling bearings incorporated in an axle box provided on a railway vehicle carriage,
A vibration detecting device for detecting vibration of each of the rolling bearings;
An analysis device for judging abnormality of the rolling bearing from detection data detected by the vibration detection device;
A reception response detection start means for receiving a detection start signal and causing the vibration detection device to detect vibration of the rolling bearing;
A measurement start command transmission device provided at a location away from the railway vehicle and transmitting the detection start signal to the reception response detection start means;
A bearing abnormality detecting device for railway vehicles, comprising:   The bearing abnormality detection device for a railway vehicle according to claim 1, wherein the measurement start command transmission device is installed at a position separated in a rail longitudinal direction from a joint or a point portion of a traveling rail for running the railway vehicle. Railway vehicle bearing abnormality detection device.   The bearing abnormality detection device for a railway vehicle according to claim 2, wherein a plurality of the reception response detection start means are provided for each axle box to be detected for vibration, and the reception response detection start means that has received the detection start signal is A railway vehicle bearing abnormality detection device having a function of sequentially transmitting a detection start signal to a reception response detection start means provided in a subsequent vibration detection target.   The railway vehicle bearing abnormality detection device according to claim 3, wherein when there are a plurality of joints or point portions of the running rail, the railroad vehicle bearing abnormality detection is provided with the measurement start command transmission device corresponding to the number. apparatus.   The railway vehicle bearing abnormality detection device according to any one of claims 1 to 4, wherein the measurement start command transmission device is installed in a vehicle base that travels and inspects the rail vehicle. Anomaly detection device.   6. The railway vehicle bearing abnormality detection device according to claim 5, wherein the condition for detecting the vibration of each rolling bearing is that the drive motor for driving the railway vehicle is in a non-energized state and the speed of the railway vehicle is A bearing abnormality detecting device for a railway vehicle that is 25 km / h or more and 35 km / h or less.

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