JP6444201B2 - Railway vehicle distortion measurement system and distortion measurement apparatus - Google Patents

Description

  The present invention relates to a strain measurement system and a strain measurement device during travel of a railway vehicle, and more particularly to a strain measurement system and strain measurement device that measure strain during travel of each member of the rail vehicle.

  In each member such as a bogie frame and a wheel shaft of a railway vehicle, in order to analyze a load acting during traveling and a deformation caused by this, measurement using a railway vehicle that simulates actual traveling is performed.

  For example, in Patent Document 1, a sensor is attached to a rolling device such as a bearing of a railway vehicle, in particular, an axle bearing, and various physical quantities such as a load acting during traveling are measured to diagnose an abnormality occurring in the member. An apparatus is disclosed. Sensors for measuring various physical quantities including distortion are attached to a plurality of members of the vehicle, and output signals thereof are sent to an abnormality diagnosis device provided inside the railway vehicle. In the abnormality diagnosis device, an analog signal received from each sensor is amplified by an amplifier, converted into digital data by an AD converter, processed by software of the abnormality diagnosis device, and an abnormality diagnosis of the railway vehicle is performed.

  Patent Document 2 discloses an apparatus for measuring wheel load by attaching a strain gauge to a shaft spring of a railway vehicle and measuring a strain amount generated during traveling. The output of the strain gauge is input to a control device provided in the crew room inside the vehicle, and the wheel load is calculated from the amount of strain of the shaft spring. This document also discloses that a strain gauge attached to a cross beam member is connected to a control device to calculate the amount of twist of the carriage frame.

  By the way, as in the methods of Patent Document 1 and Patent Document 2, generally, an analog electrical signal output from a strain gauge is converted into digital data through an AD converter, and analysis of loads and deformations is performed by various devices. Used for. In a running railway vehicle, a shield wire is used for wiring from a strain gauge to an analysis device inside the vehicle in order to suppress disturbance noise to signal transmission. However, since this shield wire has a larger diameter than a general electric wire, it is necessary to secure a relatively large accommodation space inside the vehicle. Moreover, in a railway vehicle having a long housing dimension in the traveling direction, strains at a plurality of locations are often measured at the same time and are synchronized for analysis, and it is necessary to provide a wiring space along the railway vehicle.

  On the other hand, for example, in Patent Document 3, a strain gauge is attached as an axial force sensor to the axle of a railway vehicle, and the output data is transmitted wirelessly to an analysis device inside the vehicle, and the wiring as described above is unnecessary. A method for measuring the axial force is disclosed. The axial force sensor is connected to an output unit fixed to the axle with a lead wire and transmits output data wirelessly. This is received by an analysis device and combined with other measurement data from an encoder to perform various analyses.

  A data logger device is also commercially available as a portable strain measuring device, and if a strain gauge is connected to the measuring device main body, the strain can be read directly on the spot. Analysis can be performed in the same manner as in Patent Document 3 by attaching such a device to a member of a railway vehicle and further providing a transmission unit for transmitting data.

JP 2008-209229 A JP 2004-209995 A JP 2014-54881 A

  As mentioned above, a space is required to install various devices for simultaneously analyzing strains at multiple locations and analyzing loads, deformations, etc., in order to simulate actual driving Uses a dedicated test vehicle with these placement spaces. In this case, it is difficult to faithfully reproduce the behavior of a vehicle on which a passenger is boarded like an actual business vehicle.

  The present invention has been made in view of such a situation, and an object of the present invention is to accurately correct distortion data at a plurality of locations generated during traveling on a member of a railway vehicle, particularly a business vehicle. It is an object of the present invention to provide a strain measurement system and a strain measurement apparatus that can measure the above.

  A distortion measurement system for a railway vehicle according to the present invention is a distortion measurement system for measuring distortion during traveling of a member of a railway vehicle, from a distortion sensor attached to the member to a distortion measuring device fixed to the member. Using a portable recording medium in which an analog signal is derived and converted into digital data and time data is recorded together, the digital data recorded on each of the plurality of portable recording media is made to correspond to traveling information and the distortion The relative position information of the sensor is given together to measure the distortion of the member.

  According to such an invention, digital data that can be synchronized from a railway vehicle after traveling can be collected, and a wiring space in the vehicle is unnecessary, and distortion generated during traveling in a member of a business vehicle can be accurately measured. Further, without providing an analysis device inside the vehicle, it is possible to analyze a load or deformation as a member of a railway vehicle from a plurality of measurement results of strain that can be synchronized based on traveling information and position information. In addition, since the measuring device can be made compact by eliminating the need for connection of the analyzing device, the mounting site can be set freely, and even if it falls from a member of the railcar that is temporarily mounted, it does not hinder travel.

  Moreover, the distortion measuring apparatus for a railway vehicle according to the present invention associates the distortion data recorded at a plurality of locations in the member of the railway vehicle with the traveling information, and combines the relative position information of the plurality of the locations. A railway vehicle distortion measuring device used for measuring the distortion of a member, including a time calculation unit, an A / D conversion unit, a recording unit, and a portable recording medium socket, and is fixed to the member A distortion measuring device main body, and a distortion sensor electrically connected to the AD converter and affixed to the member, and converts an analog signal from the distortion sensor into digital data via the AD converter In addition, the time data from the time calculation unit is recorded together on the portable recording medium via the portable recording medium socket.

  According to such an invention, digital data that can be synchronized can be stored until after traveling, and no wiring space is required in the vehicle, and data for accurately measuring distortion generated during traveling in the members of the business vehicle is collected. be able to. In addition, since the measuring device can be made compact by eliminating the need for connection of the analyzing device, the mounting site can be set freely, and even if it falls from a member of the railcar that is temporarily mounted, it does not hinder travel.

  In the above-described invention, a vibration sensor may be further provided, and the operation may be performed based on an output of the vibration sensor. According to this invention, the distortion measuring device can be operated only during traveling of the railway vehicle, and the distortion generated during traveling of the member of the business vehicle can be accurately measured while reducing power consumption.

  In the above-described invention, the operation may be performed according to a time table corresponding to the time data. According to this invention, it is possible to operate the distortion measuring device while focusing on the traveling of the railway vehicle, and accurately measure the distortion generated during the traveling of the member of the business vehicle while reducing the power consumption. it can.

It is a block diagram of the distortion measuring apparatus by this invention. It is the (a) top view and (b) side view of a railroad vehicle containing the bogie frame which attaches a distortion measuring device. 1 is a block diagram of a distortion measurement system according to the present invention. It is a figure which shows the example of the analysis by a distortion measurement system.

  The details of the strain measuring apparatus according to one embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, a strain measuring apparatus 1 is connected to a strain sensor 2 made of a strain gauge, and converts an analog signal from the strain sensor 2 into digital data, and an A / D conversion unit. 3, a recording unit 4 connected to 3, a time calculation unit 5 connected to the recording unit 4 and outputting the current time, a vibration sensor 8, and a socket 6 to which a portable recording medium 7 is connected. The strain sensor 2 is preferably a self-temperature compensated strain gauge that takes temperature compensation into consideration, and is preferably directly connected (directly attached) to the A / D converter 3. The strain measuring apparatus 1 also includes a power source for operation such as a battery (not shown).

  The A / D converter 3 receives an analog signal from the strain sensor 2, that is, a voltage value from the strain gauge, and converts it into digital data. An amplifier that amplifies an analog signal is provided between the strain sensor 2 and the A / D converter 3 as necessary.

  The recording unit 4 also serves as a control unit that controls the operation of the distortion measuring apparatus 1. The digital data from the A / D conversion unit 3 and the time data according to the current time from the time calculation unit 5 are combined in the socket 6. Recording can be performed on the connected portable recording medium 7. That is, the digital data recorded on the portable recording medium 7 is data indicating a voltage value corresponding to the distortion. As the portable recording medium 7, for example, an SD card can be used.

  The time calculation unit 5 has a built-in clock and measures the time, and can send time data corresponding to the current time in response to a request from the recording unit 4.

  In addition, the strain measuring apparatus 1 can automatically control ON / OFF of the power supply by the connected recording unit 4 so as to operate based on the output of the vibration sensor 8. The distortion measuring apparatus 1 also includes an input unit (not shown) for performing various other settings and a display unit for assisting input.

  Next, a method for using the strain measuring apparatus 1 will be described with reference to FIG.

  As shown in FIG. 2A, the strain measuring device 1 is fixed to a beam member 12 on the side of a bogie frame of a railway vehicle 11, for example, so as not to drop during traveling. The strain sensor 2 connected to the strain measuring device 1 is attached to a predetermined position of the beam member 12, for example, one each before and after the left and right beam members 12. Referring to FIG. 2B in particular, the beam member 12 is arranged over a wide range from the front vehicle to the rear vehicle in the train formation 10 in which a plurality of railway vehicles 11 are connected. Therefore, each of the strain sensors 2 attached to each beam member 12 can specify an individual attachment location. Specifically, a code that can specify the location is input to the corresponding distortion measuring device 1, and the code is also recorded on the portable recording medium 7 by the recording unit 4.

  When the train formation 10 to which the strain measuring device 1 is attached is run, the recording unit 4 turns on the power of the strain measuring device 1 by the output from each vibration sensor 8 based on the vibration of the railway vehicle 11. For example, when the output from the vibration sensor 8 is equal to or greater than a predetermined threshold value, the power supply for distortion measurement is turned on. As a result, digital data of voltage corresponding to the strain at the location of the beam member 12 to which each strain sensor 2 is attached during traveling of the train formation 10 is recorded on the portable recording medium 7 together with the time data. For example, digital data during running is recorded at a predetermined time interval, that is, at a predetermined sampling period.

  On the other hand, when the train formation 10 is stopped, the recording unit 4 turns off the power of the distortion measuring device 1 by the output from each vibration sensor 8 based on the stop of the vibration of the railway vehicle 11. This stops the recording of digital data. For example, the recording unit 4 controls to turn off the power relating to the distortion measurement unless an output of a predetermined threshold value or more from the vibration sensor 8 is input during a predetermined time interval. Thereby, even if the train organization 10 is operating, for example, the power relating to strain measurement of the strain measuring device 1 can be turned off while the train is stopped at a station, thereby saving power consumption. Further, the recording interval (sampling interval) may be changed according to the magnitude of the vibration, such as shortening the recording interval of the digital data when there is a vibration equal to or greater than a predetermined threshold exceeding the above threshold.

  The portable recording medium 7 is removed from each of the strain measuring devices 1 of the train organization 10 that has finished operation, and digital data recorded in a strain measuring system to be described later is used.

  According to such a strain measuring device 1, the wiring in the railway vehicle 11 is omitted, and the running digital data on the strain of each beam member 12 from the strain sensor 2 attached to each measurement position of the train formation 10. Can be recorded. Since wiring can be omitted without using radio, disturbance noise can be suppressed, and accurate digital data regarding distortion can be obtained. Further, the digital data can be recorded together with the time data, and the digital data at different pasting positions of the plurality of strain sensors 2 can be synchronized.

  The recording unit 4 records new digital data at an address where older data of the portable recording medium 7 is stored when recording is performed up to the upper limit of the capacity of the portable recording medium 7 or every time a predetermined period elapses. The time data may be overwritten and recorded. Digital data or the like can be taken out from the portable recording medium 7 as necessary.

  Next, the details of the strain measurement system that measures the strain of the member from the digital data recorded on the portable recording medium 7 will be described with reference to FIG.

  As shown in FIG. 3, the strain measurement system 20 is composed of a personal computer or the like, and inputs data recorded by connecting the portable recording medium 7 described above, so that each member of the vehicle formation 10 is traveling. The system can analyze deformation and the like, and includes a control unit 21 and a storage unit 22.

  The control unit 21 includes a CPU (not shown) that executes a predetermined program, and a memory (not shown) that includes a ROM that stores the program and a RAM that temporarily stores information necessary for executing the program. The control unit 21 can perform operations such as calculation for measuring distortion described later by executing the program.

  The storage unit 22 includes a storage device such as a hard disk, and stores distortion information 25, position information 26, and travel information 27. The distortion information 25 is based on data read from the portable recording medium 7, and the control unit 21 operating according to a predetermined program converts the above distortion data into a corresponding distortion value, and then combines the time data. These are given reference numerals that can identify the location where the corresponding strain sensor 2 is attached. The position information 26 is relative position information for specifying each pasting position of the strain sensor 2 corresponding to the code with respect to the vehicle formation 10. That is, the position information 26 indicates information for specifying a distortion measurement position with respect to the vehicle formation 10. The traveling information 27 is information obtained by traveling the vehicle formation 10 and combining time data with data including at least the traveling speed.

  Next, a method of using the strain measurement system 20 will be described with reference to FIGS.

  Referring to FIG. 3, as described above, the strain measurement system 20 reads the digital data, time data, and the code that identifies the location where the corresponding strain sensor 2 is attached, recorded on the connected portable recording medium 7. . Here, as described above, the digital data indicates a voltage value corresponding to the distortion of the member where the strain sensor 2 is attached. Therefore, the distortion measurement system 20 performs an operation for measuring the distortion from the voltage by the control unit 21 and converts the digital data into a distortion value. The distortion value and the time data are combined, and a code for specifying the location where the distortion sensor 2 is attached is attached and stored in the storage unit 22 as distortion information 25. The digital data is converted into a distortion value by correcting it as necessary in consideration of temperature compensation.

  As described above, since the portable recording medium 7 is removed from each of the distortion measuring devices 1 attached to the train formation 10, distortion information is obtained from data recorded in the same manner for all of the removed portable recording media 7. 25 is obtained and stored in the storage unit 22. In this way, the distortion of each pasted portion at each time of each distortion information 25 can be measured in synchronization with the time data, and the load applied to the beam member 12 and deformation such as bending and twisting caused thereby are related to the distortion. The information to be analyzed can be analyzed.

  Also, as shown in FIG. 4, since the distortion information 25 associates distortion values at a plurality of locations with time, it can be associated with traveling information according to such time. Furthermore, the relative position in the train formation 10 of each beam member 12 whose distortion has been measured can be obtained from the position information 26. As a result, the strain information 25 can be synchronized at the time when the specific running state is reached, and the strain information 25 is related to strain such as load and deformation of each beam member 12 as a member disposed at each position of the train formation 10. Information can be analyzed by the control unit 21. In addition, in the time zone when the power of the strain measurement apparatus 1 is turned off due to the train formation 10 being stopped, digital data is not recorded, and the distortion information 25 does not exist.

  On the other hand, when the length of the train formation 10 is taken into consideration, the time for passing the specific point A on the track differs depending on each part where the strain sensor 2 is attached. Here, the time difference T that passes through the point A between the reference position on the train organization 10 from which the travel information 27 is obtained and each location where the strain sensor 2 is pasted is calculated from the position information 26 and the travel information 27. It can be obtained by using data of traveling speed. That is, the time at which each location where the distortion is measured passes through the point A can be obtained. Thereby, the information related to the distortion of the beam member 12 at each measurement position when passing through a specific point A on the track can be analyzed. For example, it is possible to compare and analyze information related to the distortion of each member of the leading vehicle, the central vehicle, and the rear vehicle when passing a specific curve.

  As described above, according to the strain measurement system 20, it is possible to accurately measure the strain generated during travel on the members of the business vehicle using the digital data collected using the strain measurement apparatus 1 described above. Even if an analysis device is not provided inside the vehicle 11, the distortion information 25 including time data is used, and a plurality of distortion measurement results are synchronized based on the position information 26 and the traveling information 27. Information can be analyzed. In addition, since the strain measuring device 1 does not need to be connected to an analysis device and can be downsized, the attachment site can be set freely, and even if it drops off, it does not affect the running of the vehicle.

  Note that the strain measuring apparatus 1 may control the power ON / OFF so as to operate according to the time table corresponding to the time calculation unit 5. As a result, digital data on distortion can be collected only when necessary in accordance with a predetermined schedule of train formation 10 operation, and power consumption can be saved.

  In the above-described embodiment, the strain sensor 2 is attached to the beam member 12 on the side of the carriage frame and the strain on the beam member 12 is measured. However, the strain on other members of the railway vehicle 11 can be measured similarly.

  Up to this point, representative embodiments and modifications based thereon have been described. However, the present invention is not necessarily limited thereto, and those skilled in the art will understand the gist of the present invention or the appended claims. Various alternative embodiments and modifications may be found without departing from the invention.

DESCRIPTION OF SYMBOLS 1 Strain measuring apparatus 2 Strain sensor 7 Portable recording medium 10 Train organization 11 Railway vehicle 12 Beam member 20 Strain measuring system 25 Strain information 26 Position information 27 Running information

Claims (3)

A distortion measurement system capable of giving a comparison / analysis of information related to distortion of each member in the railway vehicle in a specific traveling state of a train formation connected to the railway vehicle,
A portable recording medium in which an analog signal from a strain sensor affixed to the member is guided to a strain measurement device fixed to the member, converted into digital data, and time data is recorded as strain information at a predetermined sampling period. Used, the strain information recorded on each of the plurality of portable recording media is collected together with relative position information for identifying the corresponding pasted location of the strain sensor, and the specific running state is obtained. A distortion measurement system for a railway vehicle, comprising a process of synchronizing the distortion information at time from the time data.   The railway distortion measurement system according to claim 1, wherein the distortion information is selected from the specified distortion measurement device. The specified strain measuring device corresponds to the strain sensor affixed to a beam member. As information related to the strain of the member, at least one information of a load applied to the beam member, a bending caused by the load, and a twist strain measurement system of a railway vehicle according to claim 2, wherein the giving.

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