JP2017227492A - Oscillation measuring device and malfunction diagnosis system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a malfunction diagnosis with accuracy higher than the accuracy of conventional malfunction diagnoses, with reduction in cost.SOLUTION: An oscillation measuring device according to an embodiment of the present invention is fixed on an object that travels along an orbit to measure oscillation of the object. A first transmitter and a second transmitter are located along the orbit. The first transmitter is configured to transmit a first trigger signal to a first measurement point on the orbit. The second transmitter is configured to transmit a second trigger signal to a second measurement point on an orbit different from the orbit on which the first measurement point is located. The oscillation measuring device includes an oscillation sensor, a receiving section, and a storage section. The oscillation sensor is configured to measure oscillation data of the object. The receiving section is configured to receive the first trigger signal and the second trigger signal. The storage section is configured to store the oscillation data and necessary information to determine a traveling speed of the object after reception of the first trigger signal and the second trigger signal.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a vibration measuring device and an abnormality diagnosis system used for abnormality diagnosis of an axle bearing in a railway vehicle.

  When an abnormality occurs in an axle bearing in a railway vehicle, abnormal vibration may occur and passenger comfort may be impaired. For this reason, it is not preferable to continue running while an abnormality occurs in the axle bearing. When an abnormality occurs in the axle bearing, it is necessary to take measures such as repairing the axle bearing.

  Although it may take a long time to repair the axle bearing, a great loss can occur when the normal operation is stopped for a long time. For this reason, an abnormality diagnosis of an axle bearing may be performed in order to find an abnormality sign at an early stage in maintenance inspections performed in preparation for normal operation.

  In order to accurately diagnose the abnormality of the axle bearing, the moving speed of the railway vehicle at the time when the vibration data is measured is required. As a method for obtaining the moving speed of the railway vehicle, a method for obtaining the moving speed of the railway vehicle from the rotational speed of the axle bearing is known. For example, Japanese Patent Application Laid-Open No. 2006-77945 (Patent Document 1) discloses an abnormality diagnosis device that obtains an axle rotation speed signal from a rotation speed sensor attached to an axle bearing to diagnose an axle abnormality. .

JP 2006-77945 A

  According to the abnormality diagnosis device disclosed in Japanese Patent Laid-Open No. 2006-77945 (Patent Document 1), whether the measured vibration is a vibration caused by an abnormality in the axle bearing, or the railway vehicle is, for example, a rail joint or a branch point. There is a problem that it is not possible to distinguish whether the vibration is irrelevant to the abnormality of the axle bearing, such as vibration generated when passing (point).

  In addition, in the abnormality diagnosis device disclosed in Japanese Patent Application Laid-Open No. 2006-77945 (Patent Document 1), a rotational speed sensor is required for each axle bearing, so the cost of the rotational speed sensor itself and the labor of installation (cost) ).

  The present invention has been made to solve the above-described problems, and an object of the present invention is to improve the accuracy of abnormality diagnosis of an axle bearing while suppressing cost.

  The vibration measuring apparatus according to an embodiment of the present invention is fixed to an object moving along a track and measures the vibration of the object. A first transmitter for transmitting a first trigger signal along a trajectory toward a first measurement point on the trajectory, and a second trigger signal toward a second measurement point on a trajectory different from the first measurement point A second transmission device for transmission is arranged. The vibration measuring device includes a vibration sensor, a receiving unit, and a storage unit. The vibration sensor is configured to measure vibration data of the object. The receiving unit is configured to receive the first trigger signal and the second trigger signal. The storage unit is configured to store the vibration data and information necessary for obtaining the moving speed of the object after receiving the first trigger signal and the second trigger signal.

  The vibration measuring apparatus according to the present invention stores vibration data after receiving the first trigger signal transmitted toward the first measurement point and the second trigger signal transmitted toward the second measurement point. By setting the first measurement point and the second measurement point before the railroad vehicle passes the point on the track where the vibration that is not related to the abnormality of the axle bearing is unlikely to occur, the vibration measuring device can detect the abnormality of the axle bearing. Vibration measurement can be performed at a point on the orbit where vibration that is unrelated to occurrence is unlikely to occur. As a result, the vibration data measured by the vibration measuring apparatus according to the present invention is less likely to include vibrations unrelated to the abnormality of the axle bearing, so that the accuracy of abnormality diagnosis can be improved.

  Moreover, the vibration measuring apparatus according to the present invention determines the moving speed of the object after receiving the first trigger signal transmitted toward the first measurement point and the second trigger signal transmitted toward the second measurement point. Save the information you need to ask for. By measuring the distance between the first measurement point and the second transmission device in advance, the moving speed of the object between the first measurement point and the second measurement point can be calculated. As a result, a rotational speed sensor for acquiring the moving speed of the object is not necessary, and the accuracy of abnormality diagnosis can be improved while suppressing costs.

It is a figure which shows a mode that the vibration measuring device which concerns on embodiment is being fixed to the rail vehicle. It is a flowchart which shows the flow of the abnormality determination method of a general axle shaft bearing. It is a figure which shows a mode that the transmitter is transmitting the trigger signal to the vibration measuring device. 2 is a functional block diagram for explaining a functional configuration of the abnormality diagnosis system according to Embodiment 1. FIG. It is a figure which shows a mode that a vibration measurement is performed avoiding the joint of a rail in the abnormality diagnosis system which concerns on Embodiment 1. FIG. 3 is a flowchart for explaining processing performed by a control unit of the vibration measuring apparatus according to the first embodiment. 6 is a functional block diagram for explaining a functional configuration of a vibration measuring apparatus according to Embodiment 2. FIG. In the abnormality diagnosis system which concerns on Embodiment 2, it is a figure which shows a mode that measurement data are transmitted to a data collection device from a vibration measuring device. It is a figure which shows the outline of a structure of the abnormality diagnosis system which concerns on Embodiment 2. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated in principle.

[Embodiment 1]
FIG. 1 is a diagram illustrating a state in which a vibration measuring device 21 according to an embodiment is fixed to a railway vehicle 10. As shown in FIG. 1, the axle box 11 supports an axle bearing (not shown) attached to the axle 13. The axle box 11 is an object whose vibration is measured by the vibration measuring device 21. Wheels 15 are attached to both ends of the axle 13 in the axial direction. Since the wheel 15 is rotatably supported by the axle bearing, the railway vehicle 10 can travel on the two rails 40 laid in parallel. The vibration measuring device 21 is fastened to the axle box 11 with bolts 14. The vibration measuring device 21 can be detached from the axle box 11 by being attached to the axle box 11 with bolts 14. For example, the vibration measuring device 21 is detached from the axle box 11 during normal operation and attached to the axle box 11 during a test run during maintenance and inspection.

  Since the vibration measuring device 21 is fastened to the axle box 11 by the bolts 14, it is possible to reduce contact resonance that occurs regardless of the abnormality of the axle bearing on the contact surface between the vibration measuring device 21 and the axle box 11. . The vibration measuring device 21 is preferably fixed on the upper side or the lower side in the straight direction so as to follow the lead vibration direction of the axle box 11.

  FIG. 2 is a flowchart showing a flow of a general axle bearing abnormality determination method. Hereinafter, the step is simply referred to as S. As shown in FIG. 2, the vibration data of the axle bearing is measured in S1. Subsequently, in S2, the frequency analysis of the vibration data is performed. Finally, in S3, it is determined whether or not the peak value of the frequency analysis exceeds a predetermined threshold value, thereby determining the abnormality of the axle bearing. The present invention is for the vibration measurement performed in S1. Hereinafter, characteristic vibration measurement in the present invention will be described.

  When an abnormality occurs in an axle bearing in a railway vehicle, abnormal vibration may occur and passenger comfort may be impaired. For this reason, it is not preferable to continue running while an abnormality occurs in the axle bearing. When an abnormality occurs in the axle bearing, it is necessary to stop the operation of the vehicle and take measures such as repairing the axle bearing.

  It may take a long time to repair the axle bearing. A significant loss can occur when stopping normal operation for a long time. Therefore, for example, an abnormality diagnosis of an axle bearing may be performed in a maintenance inspection performed in preparation for normal operation.

  An abnormality diagnosis of each axle bearing can be performed by fixing the vibration measuring device 21 to each axle box with a bolt 14 and measuring the vibration during maintenance inspection. However, the vibration data measured by the vibration measuring device 21 includes not only vibration caused by an abnormality in the axle bearing but also vibration generated when the railway vehicle 10 passes, for example, a rail joint or a branch point. May include vibrations unrelated to abnormal axle bearing abnormalities. If the vibration data includes vibrations unrelated to the abnormality of the axle bearing, the accuracy of the abnormality diagnosis is lowered.

  Further, in order to accurately diagnose the abnormality of the axle bearing, the moving speed of the railway vehicle when the vibration data is measured is necessary. As a method of acquiring the moving speed of a railway vehicle, a method of acquiring a rotation speed signal of an axle from a rotation speed sensor attached to an axle bearing is known. However, according to this method, since a rotational speed sensor is required for each axle bearing, the cost of the rotational speed sensor and the time and effort of installation are required.

  Therefore, in the first embodiment, vibration is received after reception of the first trigger signal transmitted toward the first measurement point on the rail 40 and the second trigger signal transmitted toward the second measurement point on the rail 40. Save the data. By setting the first measurement point and the second measurement point before the railcar 10 passes through a point on the track where vibration unrelated to the abnormality of the axle bearing is unlikely to occur, the vibration measuring device 21 can set the axle bearing. Vibration measurement can be performed at a point on the orbit where vibration that is unrelated to the abnormality is difficult to occur. As a result, the vibration data measured by the vibration measuring device 21 is unlikely to include vibrations unrelated to the abnormality of the axle bearing, so that the accuracy of abnormality diagnosis can be improved.

  In the first embodiment, the vibration measurement device 21 receives the first trigger signal transmitted toward the first measurement point and the second trigger signal transmitted toward the second measurement point, and then the railway vehicle. The reception time of the first trigger signal and the reception time of the second trigger signal are stored as information necessary to obtain the moving speed of 10. By measuring the distance between the first measurement point and the second transmission device in advance, the moving speed of the railway vehicle 10 between the first measurement point and the second measurement point can be calculated. As a result, a rotational speed sensor for acquiring the moving speed of the railway vehicle 10 is not necessary, so that the accuracy of abnormality diagnosis can be improved while suppressing costs.

  FIG. 3 is a diagram illustrating a state in which the transmission device 31 (32) transmits the trigger signal Trg1 (Trg2) to the vibration measurement device 21. As shown in FIG. 3, the vibration measuring device 21 receives the trigger signal Trg1 (Trg2). The transmission device 31 (32) is installed, for example, at a location that is separated from the rail joint or branch point by a predetermined distance along the traveling direction of the railway vehicle. By installing the transmission device 31 (32) in such a place, the vibration measurement at the measurement point on the rail where the vibration generated when the railway vehicle 10 passes through the joint or branch point of the rail is almost attenuated. Is possible. The predetermined distance can be appropriately calculated by an actual machine experiment or simulation.

  For example, radio waves or infrared rays can be used as the trigger signal. The radio wave is an electromagnetic wave having a frequency of 3 million megahertz (3 terahertz) or less, for example. Infrared light is, for example, light having a wavelength of 870 nm to 1000 nm.

  When infrared rays are used as a trigger signal, disturbance light such as sunlight is blocked around the transmission devices 31 and 32 (for example, the back surface and both side surfaces) so that the light does not enter the reception unit of the vibration measurement device 21. A light shielding wall, a light shielding sheet, a shielding wall, or the like may be provided. Further, a pipe for blocking ambient light may be provided so as to surround the trigger signal receiving hole of the vibration measuring device 21. In addition, in order to prevent dew condensation and fogging of the trigger signal emission portions of the transmission devices 31 and 32 and the reception portion of the vibration measurement device 21, a porous film or the like that can pass only air without passing rainwater is pasted. Ventilation holes should be provided on each.

  FIG. 4 is a functional block diagram for explaining the functional configuration of the abnormality diagnosis system 100 according to the first embodiment. As shown in FIG. 4, the abnormality diagnosis system 100 includes a vibration measurement device 21, transmission devices 31 and 32, and an analysis device 81.

  The vibration measurement device 21 includes a control unit 210, a reception unit 220, a vibration sensor 230, a storage unit 240, and a power supply unit 250. These are mounted by attaching electronic components to one or both sides of a printed circuit board. The printed circuit board is preferably made of epoxy resin with glass having high rigidity. The vibration measuring device 21 preferably includes a metal housing having an integral structure that houses the components of the vibration measuring device 21 shown in FIG. By housing each component of the vibration measuring device 21 in a metal housing, it is possible to prevent electromagnetic noise generated from the railway vehicle 10 from entering. The metal housing is preferably an iron-based metal.

  When receiving the trigger signal, the receiving unit 220 outputs a signal indicating that the trigger signal has been received to the control unit 210.

  The vibration sensor 230 outputs a signal representing vibration data of an object whose vibration is measured to the control unit 210. The vibration sensor 230 is preferably a piezoelectric acceleration sensor that can detect vibrations in a wide range of frequencies.

  The storage unit 240 includes a removable nonvolatile memory (not shown) such as an SD card or a USB (Universal Serial Bus) memory. Data stored in the storage unit 240 can be taken out by the nonvolatile memory. The storage unit 240 may include, for example, a flash memory that is a nonvolatile semiconductor memory, an EEPROM (Electrically Erasable Programmable Read-Only Memory), or an HDD (Hard Disk Drive) that is a storage device.

  The power supply unit 250 supplies battery power (not shown) to the control unit 210, the reception unit 220, the vibration sensor 230, and the storage unit 240. As the battery, a nickel metal hydride battery that can be repeatedly charged can be used.

  The control unit 210 controls the vibration measuring device 21 in an integrated manner. The control unit 210 includes a processor such as a CPU (Central Processing Unit) and a volatile memory. When the receiving unit 220 receives the trigger signal Trg1, the control unit 210 stores the time when the trigger signal Trg1 is received in the storage unit 240. When the receiving unit 220 receives the trigger signal Trg2, the control unit 210 stores the time when the trigger signal Trg2 is received in the storage unit 240, and also stores the vibration data measured by the vibration sensor 230 in the storage unit 240. Specifically, an analog output signal from the vibration sensor 230 is input to the control unit 210 via an operational amplifier circuit and a filter circuit (both not shown), and the signal is A / D converted by the control unit 210. And stored in the storage unit 240. It is desirable in terms of power saving that the control unit 210 is in a normal sleep state and is activated when a trigger signal is received. The filter circuit constitutes a band pass filter in which a predetermined pass band is set in order to extract frequencies before and after the bearing natural frequency. The filter circuit may be composed of a combination of a high pass filter and a low pass filter.

  The analysis device 81 includes, for example, a PC (Personal Computer) in which abnormality diagnosis software is installed. The analysis device 81 is equipped with a non-volatile memory in which vibration data measured by the vibration measurement device 21 is stored. The analysis device 81 reads vibration data from the non-volatile memory and performs frequency analysis, for example, and performs vibration data abnormality diagnosis.

  In the frequency analysis, when abnormal damage occurs on the rolling surface of the axle bearing (rolling bearing), the vibration caused by the abnormality becomes remarkable and a peak is generated in the passage period of the rolling elements. The abnormality diagnosis can be performed by investigating in advance the damage state of the axle bearing and the peak level of the abnormal vibration waveform, and comparing the investigation result with the analysis result of the vibration data.

  The transmission device 31 is configured to transmit the trigger signal Trg1 toward the first measurement point on the rail 40. The transmission device 32 is configured to transmit the trigger signal Trg2 toward the second measurement point on the rail 40. The transmission devices 31 and 32 are installed along the rail 40. The distance between the first measurement point and the second measurement point is measured in advance and stored in the analysis device 81.

  FIG. 5 is a diagram illustrating a state in which vibration measurement is performed while avoiding the joint of the rail 40 in the abnormality diagnosis system 100 according to the first embodiment. In FIG. 5, the measurement point P <b> 1 is separated from the point G <b> 1 where the rail 40 is connected by a predetermined distance in the traveling direction of the railway vehicle 10 indicated by the arrow M <b> 1. The transmitter 31 transmits the trigger signal Trg1 toward the measurement point P1 on the rail 40. The transmission device 32 transmits the trigger signal Trg2 toward the measurement point P2 on the rail 40. The distance between the measurement points P1 and P2 is the distance D1. The transmission device 32 is separated from the transmission device 31 by a distance D1 in the traveling direction of the railway vehicle 10 in accordance with the distance between the measurement points P1 and P2.

  Each vibration measuring device 21 shown in FIG. 5A sequentially passes through the point G1 as the railway vehicle 10 advances. Thereafter, as shown in FIG. 5B, each vibration measurement device 21 receives the trigger signal Trg1 from the transmission device 31 when passing the measurement point P1, and stores the reception time of the trigger signal Trg1 in the storage unit 240. Save to. Thereafter, as shown in FIG. 5C, each vibration measuring device 21 receives the trigger signal Trg2 from the transmitting device 32 when passing through the measurement point P2, and stores the reception time of the trigger signal Trg2 in the storage unit 240. Save to. Each vibration measuring device 21 starts vibration measurement in response to receiving the trigger signal Trg2, and stores vibration data in the storage unit 240.

  In the first embodiment, the vibration measurement device 21 stores vibration data measured during a predetermined time from the timing at which the trigger signal Trg2 is received. The vibration data stored in each vibration measuring device 21 is measured under almost the same conditions. For this reason, when comparing the vibration data of the axle bearings, there is no need to make corrections to make the measurement conditions uniform. The difference between the vibration data indicating the abnormality of the axle bearing and the normal vibration data becomes clear without requiring the correction. As a result, the accuracy of abnormality diagnosis is improved, and the abnormality of the axle bearing can be easily found.

  Further, in the first embodiment, the time when the vibration measurement device 21 receives the trigger signal Trg1 together with the vibration data and the time when the trigger signal Trg2 is received are stored in the storage unit 240. Further, the distance between the transmission devices 31 and 32 is measured in advance and stored in the analysis device 81. The analysis device 81 calculates the moving speed of the railway vehicle 10 between the measurement points P1 and P2 from the distance between the transmission devices 31 and 32 and the difference between the reception time of the trigger signal Trg1 and the reception time of the trigger signal Trg2. can do. In the first embodiment, since the rotational speed sensor is not required to acquire the moving speed of the railway vehicle 10, the cost of abnormality diagnosis can be improved while suppressing the cost.

  FIG. 6 is a flowchart for explaining a process performed by control unit 210 of vibration measuring apparatus 21 according to the first embodiment. The process shown in FIG. 6 is called and executed by a main routine (not shown).

  As shown in FIG. 6, the controller 210 determines whether or not a trigger signal has been received in S201. When the trigger signal is received (YES in S201), control unit 210 stores the time at which the trigger signal is received in S202 in storage unit 240, and advances the process to S203. The controller 210 determines whether or not the trigger signal is received for the second time in S203. If the trigger signal is received for the second time in S203 (YES in S203), control unit 210 starts vibration measurement in S204 and returns the process to the main routine. When the second trigger signal is received, the control unit 210 resets the trigger signal count. The timing for starting the vibration measurement may be not after the time when the second trigger signal is received, but after a predetermined time has elapsed since that time.

  If the trigger signal has not been received (NO in S201) and if the trigger signal has not been received for the second time (NO in S203), control unit 210 returns the process to the main routine.

  As described above, according to the first embodiment, the transmission device transmits a trigger signal toward a measurement point at which vibrations unrelated to the abnormality of the axle bearing are unlikely to occur. Therefore, the vibration measuring device can measure the vibration at the timing at which the trigger signal from the transmitting device is received, and thereby can measure the vibration at the measurement point where the vibration unrelated to the abnormality of the axle bearing hardly occurs. As a result, the vibration data measured by the vibration measuring device is unlikely to include vibrations unrelated to the abnormality of the axle bearing, so that the accuracy of abnormality diagnosis can be improved.

  In addition, the vibration measuring device stores the reception times of the two trigger signals. By measuring the distance between the two measurement points in advance and storing it in the analysis device, the moving speed of the railway vehicle between the two measurement points can be calculated. As a result, a rotational speed sensor for acquiring the moving speed of the railway vehicle is not required, and the accuracy of abnormality diagnosis can be improved while suppressing costs.

  The information necessary for obtaining the moving speed of the railway vehicle may be a time interval between the reception time of the first trigger signal and the reception time of the second trigger signal. Alternatively, the distance between the first measurement point and the second measurement point is stored in advance in the vibration measurement device, and the moving speed of the railway vehicle between the first measurement point and the second measurement point is calculated in the vibration measurement device. May be saved.

[Embodiment 2]
In Embodiment 1, the case where the data preserve | saved at the memory | storage part of the vibration measuring device was moved to an analyzer with the removable non-volatile memory was demonstrated. In the second embodiment, a case where the data is transmitted to the analysis device using wireless communication will be described. In the second embodiment, the “measurement data” includes vibration data stored in the storage unit of the vibration measurement device and information necessary for obtaining the moving speed of the railway vehicle. Also in the second embodiment, the information necessary for obtaining the moving speed of the railway vehicle is the reception time of the trigger signal.

  The difference between the first and second embodiments is the configuration of the vibration measuring device and the configuration of the abnormality diagnosis system. That is, the configuration of the vibration measuring device 21 shown in FIG. 4 of the first embodiment is replaced with the vibration measuring device 22 shown in FIG. 7, and the configuration of the abnormality diagnosis system 100 shown in FIG. 4 is shown in FIG. The abnormality diagnosis system 200 is replaced. Since it is the same about other structures, the description will not be repeated.

  FIG. 7 is a functional block diagram for explaining a functional configuration of the vibration measuring apparatus 22 according to the second embodiment. As shown in FIG. 4, the vibration measurement device 22 further includes a communication unit 260 in addition to the configuration of the vibration measurement device 21 of FIG. 4. The communication unit 260 transmits the measurement data and the identifier (ID) of the vibration measurement device 22 to the data collection device 60 using a communication method compliant with ZigBee (registered trademark). A communication method compliant with ZigBee generally consumes less power than a communication method compliant with other communication standards. Therefore, power consumption can be suppressed by using a communication method compliant with ZigBee. The transmission data includes, for example, measurement date, information for identifying the axle bearing on which the vibration measuring device 22 is installed (for example, model or model number), or position information on which the vibration measuring device 22 is installed. desirable. Communication between the vibration measuring device 22 and the data collecting device 60 may be via a repeater (not shown). Communication unit 260 includes a communication circuit (not shown) and an antenna. The communication unit 260 may also function as the reception unit 220.

  FIG. 8 is a diagram illustrating how measurement data is transmitted from the vibration measurement device 22 to the data collection device 60 in the abnormality diagnosis system 200 according to the second embodiment. As shown in FIG. 8A, in the second embodiment, the data collection device 60 is installed in the vicinity of the rail 40. In the traveling direction M1 of the railway vehicle 10, the head vibration measurement device 22 has reached the measurement point 12 after passing through the measurement point P11. The head vibration measuring device 22 transmits the measurement data to the data collecting device 60 as shown in FIG. 8B after passing through the measurement point P12. The same applies to the vibration measurement device 22 that follows.

  FIG. 9 is a diagram showing an outline of the configuration of the abnormality diagnosis system 200 according to the second embodiment. As shown in FIG. 9, the abnormality diagnosis system 200 includes a plurality of vibration measurement devices 22, a data collection device 60, a data storage server 70, and an analysis device 82.

  The data collection device 60 collects transmission data from the vibration measurement device 22. The data collection device 60 transmits the collected transmission data to the data storage server 70 via a telephone line.

  The data storage server 70 stores the measurement data included in the transmission data from the data collection device 60 in association with the ID. Furthermore, the data storage server 70 manages the measurement data by classifying the measurement data, for example, for each vehicle in which the vibration measuring device is installed, for each cart, or for each axle box, based on the received ID.

  The analysis device 82 accesses the data storage server 70 using a communication method based on LAN (Local Area Network), WiFi (registered trademark), Bluetooth (registered trademark), or ZigBee, and acquires measurement data. The analysis device 82 performs frequency analysis based on the acquired measurement data and displays the result. The analysis device 82 stores the analysis result and transmits the analysis result and the ID to the data storage server 70. The data storage server 70 stores the analysis result and ID as a backup. In the data storage server 70, the analysis result and the ID are associated and managed. When the peak value (amplitude, speed, or acceleration) of the frequency analysis is equal to or greater than a predetermined threshold value, the analysis device 82 issues a warning that abnormal vibration has occurred to a predetermined transmission destination. The threshold value may be set stepwise from a value corresponding to mild abnormal vibration to a value corresponding to severe abnormal vibration.

  The frequency analysis may be performed by the data storage server 70. In that case, the data storage server transmits the result of the frequency analysis to a browsing terminal 90 such as a personal computer, a mobile phone, a smartphone, or a PDA. The user can browse the result of the abnormality diagnosis for each ID of the vibration measuring device 22 through the browsing terminal 90. Therefore, the result of the abnormality diagnosis can be browsed even when away from the analysis device 82. As a result, not only the administrator of the abnormality diagnosis system 200 but also the administrator of peripheral devices including the railway vehicle 10 can confirm the result of the abnormality diagnosis. Also, maintenance information such as bearing replacement information can be confirmed or an axle bearing can be ordered via the abnormality diagnosis system 200. Measurement data, frequency analysis results, abnormality determination results, or determination criteria (threshold values) may be stored in the data storage server 70 or the analysis device 82.

  As described above, according to the second embodiment, the transmission device transmits a trigger signal toward a measurement point at which vibration unrelated to the abnormality of the axle bearing is unlikely to occur. Therefore, the vibration measuring device can measure the vibration at the timing at which the trigger signal from the transmitting device is received, and thereby can measure the vibration at the measurement point where the vibration unrelated to the abnormality of the axle bearing hardly occurs. As a result, the vibration data measured by the vibration measuring device is unlikely to include vibrations unrelated to the abnormality of the axle bearing, so that the accuracy of abnormality diagnosis can be improved.

  Further, the vibration measuring device stores the time when the two trigger signals are received. By measuring the distance between the two measurement points in advance and storing it in the analysis device, the moving speed of the railway vehicle between the two measurement points can be calculated. As a result, a rotational speed sensor for acquiring the moving speed of the railway vehicle is not required, and the accuracy of abnormality diagnosis can be improved while suppressing costs.

  Furthermore, in the abnormality diagnosis system according to the second embodiment, the vibration measurement device can wirelessly communicate with the outside. Therefore, there is no need for wiring for communication. Further, unlike the abnormality diagnosis system according to the first embodiment, there is no need to extract measurement data from the vibration measuring device. As a result, analysis of measurement data in a remote place becomes easy.

  In the abnormality diagnosis system according to the second embodiment, the vibration measurement device transmits measurement data and ID to the data collection device. The data collection device transmits the received measurement data and ID to the data storage server. Therefore, the data storage server can specify which vibration measurement device the received measurement data is measured by. The abnormality diagnosis system facilitates management of measurement data from the plurality of vibration measurement devices 22.

  Each embodiment disclosed this time is also planned to be implemented in appropriate combination within a consistent range. The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 10 Rail vehicle, 11 axle box, 13 axle, 14 volt, 15 wheel, 21, 22 Vibration measuring device, 31, 32 Transmitter device, 40 rail, 60 Data collection device, 70 Data storage server, 81, 82 Analysis device, 90 Viewing terminal, 100, 200 abnormality diagnosis system, 210 control unit, 220 receiving unit, 230 vibration sensor, 240 storage unit, 250 power supply unit, 260 communication unit.

Claims (7)

A vibration measuring device fixed to an object moving along a trajectory and measuring the vibration of the object,
A first transmitter configured to transmit a first trigger signal along the trajectory toward a first measurement point on the trajectory; and a second measurement on the trajectory different from the first measurement point A second transmitter configured to transmit a second trigger signal toward the point is disposed;
The vibration measuring device includes:
A vibration sensor configured to measure vibration data of the object;
A receiver configured to receive the first trigger signal and the second trigger signal;
A vibration measurement apparatus comprising: a storage unit configured to store the vibration data and information necessary for obtaining a moving speed of the object after receiving the first trigger signal and the second trigger signal. .   2. The vibration measurement device according to claim 1, wherein the storage unit is configured to store the vibration data measured after a predetermined time has elapsed since receiving the first trigger signal and the second trigger signal. .   The vibration measurement device according to claim 1, further comprising a communication unit configured to wirelessly communicate measurement data stored in the storage unit to an external device. A plurality of vibration measuring devices according to claim 3;
The first transmission device and the second transmission device;
A data collection device for wirelessly receiving the measurement data from each of the plurality of vibration measurement devices and collecting the measurement data;
A data storage server that receives the measurement data from the data collection device and stores the measurement data;
An analyzer that wirelessly receives the measurement data from the data storage server and determines whether the measurement data is abnormal by determining whether a frequency analysis result of the measurement data exceeds a predetermined threshold , Abnormal diagnosis system.   The abnormality diagnosis system according to claim 4, wherein the data collection device is installed in the vicinity of the trajectory.   The abnormality diagnosis system according to claim 4, wherein a distance between the first measurement point and the second measurement point is stored in the analysis device in advance.   The abnormality diagnosis system according to claim 4, wherein the measurement data includes an identifier of the vibration measurement device.

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