• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for the non-destructive testing of test objects (1) in the form of wheels or wheel tires of a rail vehicle, wherein a test object (1) attached to the rail vehicle is set in vibration by pulsed excitation. In order to at least partially automate the method, it is provided that the sound (2) emitted by the test object (1) is recorded as measurement data (3) in a system component; the recorded measurement data (3) are compared with reference data (4) from a reference database (5); the comparison determines whether a deviation (6) from the measurement data (3) and reference data (4) lies within or outside an adjustable tolerance range (7); If there is a deviation (6) outside the tolerance range (7), an error message (8) is generated.
    公开号:CH710369B1
    申请号:CH01266/15
    申请日:2015-09-03
    公开日:2020-04-30
    发明作者:Franz Andreas；Hansen Holger；Oechsner Jens-Harro；Tieftrunk Bernd
    申请人:Siemens Mobility Austria Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a method for the non-destructive testing of test objects in the form of wheels or wheel tires of a rail vehicle, wherein a test object attached to the rail vehicle (fixed or detachable) is set into vibration by pulsed excitation.
    The vibration is a unique vibration for each test object, which includes a complex spectrum of frequencies and amplitudes.
    In the field of rail vehicles, methods for the non-destructive testing of test objects in the form of wheels or wheel tires of a rail vehicle are of particular importance, since damage such as cracks, notches or defects in the material structure can lead to failure of the test object. In order to counteract the failure during operation, which can lead to derailment of the rail vehicle, it is necessary to check the wheels or wheel tires on the rail vehicle at predetermined intervals. For this purpose, for example, optical methods are known, by which only visible damage can usually be identified. X-ray methods for determining damage cases are also known, but devices for carrying out X-ray methods are usually only transportable to a limited extent and are extremely costly to purchase.
    It is also known a method with which the test object is set into vibration, for example a resonance vibration, by impulsive excitation of the test object, for example by a blow with a hammer. A specially trained tester can now draw conclusions about damage to the test object based on the sound emitted by the test object, which is perceived by the auditor's hearing.
    [0005] An examiner trained in this way makes use of years of experience when assessing whether there is a damage event or not, and must undergo time-consuming and cost-intensive training before it can be used. Due to the dependency of the procedure on a trained examiner, the analysis is only carried out on a small scale, although the procedure itself is very promising.
    It is therefore an object of the invention to overcome the disadvantages of the prior art and to propose a method for the non-destructive testing of test objects in the form of wheels or wheel tires of a rail vehicle, which can be carried out at least partially automatically in a wide range. Furthermore, the invention should be characterized by simple handling, an inexpensive infrastructure and low operating costs.
    This object is achieved by a method having the features of patent claim 1. Advantageous embodiments of the invention are defined in the respective dependent claims.
    The invention relates to a method for the non-destructive testing of test objects in the form of wheels or wheel tires of a rail vehicle, a test object attached to the rail vehicle being set into vibration by pulsed excitation. According to the invention it is provided thatthe sound emitted by the test object is recorded as measurement data in a data record in a system component;the recorded measurement data are compared with reference data from a reference database;the comparison determines whether a deviation from the recorded measurement data and the reference data lies within or outside an adjustable tolerance range;an error message is generated if there is a deviation outside the tolerance range.
    [0009] A method according to the invention can thus be used to identify a faulty test object by comparing the measurement data with reference data and generating the error message in the event of a deviation that lies outside the tolerance range. The recorded sound is recorded in the system component (a unit for data processing with data reception, data storage, computing and data transmission means - the system component could also be referred to as an EDP-compatible device), preferably digitally, so that the evaluation and comparison is software-based can be done. The reference database includes, for example, a series of reference data for different designs and dimensions of wheel tires or wheels of rail vehicles. Setting the width of the tolerance range around the reference data enables small measurement errors to be compensated. If a deviation is detected that is within the tolerance range, the test object is qualified as OK. However, if the deviation lies outside the tolerance range, the test object is damaged or no longer usable and a corresponding error message is generated. Many different variants are conceivable for generating an error message. For example, the error message by which a defective test object is identified can be output directly to a user or can trigger a sequence of further method steps without the user being directly aware of it. An at least partially automated test, which is based on the digital evaluation of the measurement data, can thus be carried out in a simple manner. For example, it is conceivable that the impulsive excitation is carried out manually on a stationary rail vehicle or that it is triggered manually in a corresponding device. If the impulsive excitation is also automated and integrated into the process, a fully automated test process can even be implemented.
    In an embodiment variant of a method according to the invention it is provided that the data record is stored in a database. In this way, the recorded measurement data can be made quickly accessible and can also be subsequently evaluated using an identification code that clearly assigns the data record to the test object. For example, recorded measurement data from several measurements carried out at different times on a test object can be compared with one another so that a change in the state of the test object can be determined.
    In order that defective test objects can also be identified quickly and easily, a further embodiment variant of the invention provides that it is noted in the data record whether an error message has been generated.
    In many cases, additional information data are available when recording the measurement data, the acquisition of which has a positive effect on the retrievability and the linkability of data records with test objects. Such information data can be, for example:<tb> <SEP> identification data such as date, time, personnel number of the user, serial numbers of test objects, bogies or rail vehicles;<tb> <SEP> device-specific data of the system component, such as IMEI (International Mobile Equipment Identity) no. or serial number of a mobile device, user data, device identification or order numbers;<tb> <SEP> position data, such as GPS (Global Positioning System), D-GPS (Differential Global Positioning System), or other location data.It is therefore provided according to a further embodiment variant of a method according to the invention that identification data for identifying the test object or a test period and / or device-specific data for identifying a system component generating the data set and optionally position data of the system component or the test object are also recorded in the data set.
    A further embodiment variant of a method according to the invention provides that a digital audio analysis is carried out in order to compare the recorded measurement data and the reference data and the audio analysis includes at least one frequency analysis. Digital audio analysis systems are particularly well suited for fast, precise and cost-effective evaluation of measurement data. Individual frequency ranges of the measurement data can be filtered out by frequency analysis, so that only a relevant frequency range has to be analyzed.
    An oscillation curve can be broken down in the frequency analysis, for example by means of Fourier transformation, into sinusoidal individual oscillations of different frequency and amplitude, the sum of the individual oscillations corresponding to the original oscillation curve. Another alternative is, for example, the determination of the oscillation curve by a Fourier series, in which partial oscillations with a lowest frequency f1, which corresponds to the fundamental oscillation or the first harmonic, is determined by a longest occurring period duration T1 of the oscillation to be analyzed. It is also conceivable to use a Fast Fourier Transform (FFT) to calculate a Discrete Fourier Transform (DFT). Such a Fast Fourier transformation can be software-supported, for example using the "Sound Forge" software from Sonic Foundry, and carried out in real time.
    [0015] According to a preferred embodiment of a method according to the invention, the reference database is stored locally in the same system component in which the measurement data are recorded. A system component comprises an entire independent unit, which can carry out one or more process steps. By bundling the recording and the evaluation via the reference database in a system component, a test procedure is thus possible which, after the reference database has been loaded into the memory of the system component, functions completely independently and is not dependent on other system components. It is of course conceivable for the reference database to be updated at predetermined intervals or for the database itself to be exported.
    In order to enable simple data exchange between a plurality of system components which are both in the immediate vicinity or at a great distance from one another, it can be provided in an advantageous embodiment of the present invention that the measurement data and / or the data record at least between two different system components are transmitted wirelessly and the wireless transmission is preferably carried out via WLAN (Wireless Local Area Network), Bluetooth, NFC (Near Field Communication) or mobile telecommunications networks. It goes without saying that when transmitting via WLAN, a system component that is not in the same network is addressed via a cable network that is connected to a WLAN router, which router receives the measurement data or the data record. Wireless transmission simplifies operation on the one hand, and on the other hand enables the use of common end devices that have the appropriate receiving units for wireless transmission.
    [0017] Saving the recorded measurement data or the data records in a local database is sufficient for the local evaluation of the data. However, if several different test objects are to be compared with one another, the measurement data being recorded, for example, by different users, or if the recorded measurement data are to be evaluated centrally, for example in order to produce statistics or to make comparisons, the measurement data or data records must be transmitted to a central location necessary. A further preferred embodiment variant therefore provides that the recorded measurement data or the data record is transmitted to a different external database after the comparison. Since the deviation was determined before the transmission, the function of the local system component, which carries out the comparison with the reference data, is not dependent on the successful transmission. It is conceivable, for example, that the measurement data or the data record is immediately transmitted to the external database after each recording or that the measurement data or data records are transmitted at intervals. It is also conceivable that the local reference database is updated by data from the external database.
    Since in particular the use of mobile devices, such as smartphones, tablets, phablets, PDAs (Personal Digital Assistant) or pocket PCs, is widespread, it is advantageous to use such an easily available and powerful device as a system component. Therefore, a further preferred embodiment variant of the invention provides that the recorded measurement data are transmitted wirelessly to a mobile terminal. For example, a specialized detection device, for example a filtered microphone, can record the vibrations, the measurement data not being evaluated in the detection device but being transmitted to the mobile terminal.
    Most mobile devices have means for recording sounds, for example via microphones that can create digital audio files. In order to minimize the number of system components, it is provided in an alternative embodiment variant of the method that the measurement data are recorded using a mobile terminal.
    In order to use the computing power of the mobile device and to enable non-destructive testing, even if there is no connection to an externally connected communication network, such as wired internet or mobile internet, a further alternative embodiment variant provides that the comparison between measurement data and reference data is carried out on the mobile terminal.
    Is the computing power or the storage capacity of the mobile device is not sufficient, for example, because the databases are too extensive or the digital audio analysis uses a battery of the mobile device too high, or should the comparison between measurement data and reference data only at a central point are carried out, according to a preferred alternative embodiment of the invention, the measurement data are transmitted from the mobile terminal to an evaluation unit for the purpose of comparison with the reference data, and depending on the detected deviation, a message is transmitted from the evaluation unit to the mobile terminal. The message that is transmitted back to the mobile terminal contains the information as to whether the detected deviation is outside the tolerance range, so that corresponding information can be displayed to the user on the mobile terminal.
    In order to enable simple and quick operation even by untrained personnel, it is necessary that the user receives feedback about at least the result of the comparison, that is, receives immediate feedback as to whether a defect was found during the test or whether the test object was in Is okay. Immediate measures, such as marking the defective test object or decommissioning a bogie with the test object, can be initiated. Furthermore, the user preferably receives feedback when a recording and / or processing process has ended. This has the advantage that the user knows when the next test object can be started. In addition, it is conceivable that a feedback is output if the acquisition or recording has failed. For example, the detection process can fail if the excitation is too weak and therefore insufficient sound is emitted or ambient noise disturbs the detection. In this way, feedback can be generated if the measurement data deviate too much from the reference data or are in the wrong frequency spectrum or the amplitudes are too weak. In this case, the recording of the measurement data by the user must be repeated in order to obtain evaluable measurement data.
    Feedback can be given by output units, such as displays for optical output or speakers for acoustic output, which are perceptible to the user. If a mobile device, such as a smartphone, is used as a system component, the feedback can take place via the existing infrastructure of the device, which usually has a (touch) screen, vibration motors and loudspeakers. For example, an application (app) can be used to display a graphical user interface that enables visual feedback, or the app addresses the vibration motors for haptic feedback, or the app outputs sound via the loudspeaker as acoustic feedback. Of course, a combination of several different types of feedback is also conceivable.
    It is therefore provided in a preferred embodiment of the invention that an acoustic and / or haptic and / or visual feedback is generated,depending on whether the deviation is within or outside the tolerance range;when the acquisition and / or processing is complete;if the capture process has failed.
    A particularly preferred embodiment variant of a method according to the invention provides that in the event of the detection of a deviation which lies outside the tolerance range, the error message is transmitted to a control center for rail vehicles. This ensures that a central point, for example a distribution center, which allocates the individual rail vehicles to the respective orders and routes, is immediately informed if a rail vehicle is no longer ready for use and is therefore not available for orders.
    In a further particularly preferred embodiment of the invention it is provided that maintenance and / or repair orders for the corresponding rail vehicles are scheduled and initiated in the control center for rail vehicles. The test object in question or the rail vehicle or bogie on which the test object is arranged can thus be repaired in a timely manner in a simple manner. For example, individual repairs can be brought forward if defects are found, or maintenance work can be postponed to later times if all tests for a rail vehicle are negative and no defects have been found.
    According to a further preferred alternative embodiment, a detection device for recording the emitted sound is attached in a stationary manner and the sound is emitted by a rail vehicle passing the detection device or a detection device for recording the emitted sound is moved relative to the rail vehicle. The impulsive excitation is carried out automatically, for example by a device which specifically contacts test objects or is struck against test objects. This device is preferably connected to the detection device itself. It is also conceivable to provide a defined recess in the track of the rail vehicle, for example in the area of the heart of a switch, which is used for impulsive excitation. By attaching a stationary detection device, for example in the area of switches or on the track body, the emitted sound from rail vehicles passing by the detection device can be recorded and evaluated. For example, the detection device can be equipped with camera systems or axle counters in order to detect the test objects and, if necessary, to carry out the impulsive excitation. This enables automated evaluation of the data from a large number of rail vehicles, even during operation. If the detection device is moved relative to the rail vehicle, it can be guided past a stationary rail vehicle, for example, whereby energy can be saved since the moving mass of a vehicle carrying the detection device is significantly less than that of an entire rail vehicle.
    A further preferred alternative embodiment variant of a method according to the invention provides that a detection device is arranged on a rail vehicle and that the test object is repeatedly stimulated at temporary, preferably periodic, intervals. A single test object can thus be checked or evaluated over a longer period of time or also over certain route sections. If the measurement data are linked to position data, conclusions can also be drawn about possible causes of damage on certain sections of the route.
    If, in addition to the emitted sound, other extraneous or secondary noises, such as driving or ambient noises, the use of directional microphones for recording the measurement data and / or the use of filtering methods is advantageous. Such filter methods can be designed, for example, as algorithms which determine the measurement data by comparing the sound before or after the method is carried out with that during the method. Other conceivable filter methods are loudness analysis methods according to Zwicker and Feldkeller (measurement and evaluation of the loudness of diffuse and direct sound according to DIN 45631), reflection filter or active noise reduction (ANC), the latter being used to cancel sound with opposite polarity by means of destructive interference. It is also conceivable to combine ANC with the algorithm described above, that is to say picking up the sound before or after carrying out the method according to the invention, in order to use this sound for extinguishing.
    To further explain the invention, reference is made to the figures in the following part of the description, from which further advantageous refinements, details and developments of the invention can be found. The figures are to be understood as examples and are intended to illustrate the character of the invention, but in no way to narrow it down or even reproduce it conclusively. Show it:<tb> Fig. 1 <SEP> a first embodiment variant of a method according to the invention,<tb> Fig. 2 <SEP> a detailed block diagram of an evaluation unit for a method according to the invention,<tb> Fig. 3 <SEP> a second embodiment variant of a method according to the invention,<tb> Fig. 4 <SEP> a third embodiment variant of a method according to the invention.
    Figure 1 shows the structure of a first embodiment of a test arrangement of a method according to the invention. The method serves to set test objects 1 in the form of wheels or wheel tires of a rail vehicle in vibration and to record and then evaluate a sound 2 emitted by the test object, which corresponds to the natural frequencies of the test object 1. The exact course of the method is discussed in FIG. 2. Metallic wheels, metal rims, metal tires or metal wheel tires as well as rubberized tires are conceivable as test objects 1. With rubberized tires, the sound e.g. the air pressure, cracks or defects identifiable.
    The impulsive excitation of the test object 1 is symbolically represented in FIG. 1 with a hammer. It goes without saying that a multitude of manual and automated processes are possible for the excitation, which are not limited to the use of a hammer. The sound 2 emitted by the test object 1, which usually only exists for a few seconds, is recorded by a detection device 15, for example a microphone arrangement, and recorded digitally as measurement data 3. The measurement data 3 form an input variable for the detection of damage to the test objects 1 in the evaluation unit 13 connected to the detection device 15. In this embodiment variant, the detection device 15 and the evaluation unit 13 together with a communication unit 16 form a common system component. Via the communication unit 16 there is a wireless transmission of a data record 9, which contains the measurement data 3, to a different external database 11 for the purpose of archiving and jointly evaluating measurement data 3 from different rail vehicles. The wireless transmission takes place, for example, via WLAN or a mobile communication network ("mobile Internet"). It is of course also conceivable that the wireless transmission takes place up to a receiving device which forwards the data to the external database 11 via a wired line.
    FIG. 2 shows a block diagram of the evaluation method according to the invention: as described above, the measurement data 3 serve as an input variable. These are compared with reference data 4 of a reference database 5. This reference database 5 contains data from undamaged test objects 1, reference data 4 being available, for example, for different geometric forms of the test objects 1. In the embodiment variant described in FIG. 1, the reference database 5 is located in the same system component as the detection device 15, so that the evaluation can take place locally. However, it is also conceivable that the reference database 5 is stored in the external database 11 and only the reference data 4 which is required in each case is transmitted to the evaluation unit 13. By specifying the limits of a tolerance range 7, it can thus be determined whether a deviation 6 between the measurement data 3 and the reference data 4 lies within or outside the tolerance range 7. The comparison includes a digital audio analysis, which includes a frequency analysis.
    If the deviation 6 is within the tolerance range 7, no defect has been found; test object 1 is in order and ready for use. The measurement data 3 are then recorded in a data record 9, which is stored in a database 10, 11. This can be an internal database 10 as shown or an external database 11, whereby the combination of an internal and external database 10, 11 is also possible. In addition to the measurement data 3, identification data (date, serial number of the test object 1 or the like), device-specific data (IMEI, serial number of the detection device 15 or evaluation unit 13) and position data (GPS, DGPS) can also be recorded in the data record 9. It is also advantageous to record any logical or sensory data that may arise, in order to be able to access as much information as possible in the subsequent evaluation or in the assignment of the data records 9 to the test objects 1.
    However, if the deviation 6 lies outside the tolerance range 7, the test object 1 is defective and may no longer be usable. As a result, an error message 8 is generated, which is also stored in data record 9. This error message 8 can now either notify the user to inform him that a defect has been found or else it is sent to a control center 14 for rail vehicles, which for example terminates or initiates the repair or the next maintenance for the rail vehicle in question.
    A second embodiment variant of a test arrangement is shown in FIG. 3, a system component being formed by a mobile terminal 12. Such a mobile terminal 12 can be, for example, a commercially available smartphone or tablet which has a suitable computer program product. Such program products that can be executed on mobile devices 12 are usually referred to as applications or apps and are characterized by simple and intuitive operation, which can provide both visual, acoustic and haptic feedback to the user. In addition to this, such mobile terminals 12 usually have sufficient computing power and storage capacity to execute a computer program for evaluating the measurement data 3.
    In this embodiment variant, the mobile terminal 12 combines the detection device 15, which in this case is formed by a system-specific microphone of the mobile terminal 12, and the evaluation unit 13. After the comparison, the data record 9 can in turn be transmitted to the external database 11 , whereby the system's own interfaces of the mobile device are used for communication (Bluetooth, WLAN, NFC, mobile communication networks).
    FIG. 4 shows a third embodiment variant, in which a mobile terminal 12 also represents a system component. In contrast to FIG. 3, the detection device 15 is a separate, independent system component, which transmits the measured data 3 wirelessly to the mobile terminal 12. In this embodiment variant, the mobile terminal device 12 is only used to display and operate the corresponding app, but the measurement data 3 are transmitted wirelessly to a corresponding evaluation unit 13 without being evaluated. The evaluation itself takes place entirely in the evaluation unit 13, which transmits the evaluated data record 9 and / or possibly an error message 8 or a message that there is no error back to the mobile terminal 12 by means of communication device 16.
    In order to facilitate the operation of the test arrangement by untrained personnel or to ensure the consistency of the recorded data and to avoid measurement errors, feedback is output according to the invention if a deviation 6 is outside the tolerance range 7 or an error message 8 has been generated. A feedback is also generated when the acquisition and / or processing process is completed, whereby feedback is also generated in the event of a failed acquisition. This feedback can take place either via the mobile terminal 12 or via corresponding display units.
    An alternative embodiment variant of the invention provides that the resonance vibrations of the test objects are also recorded and evaluated during operation, in that either the detection device 15 is arranged in a stationary manner, for example at a switch or at another point on the track body, and the emitted sound 2 comes from rail vehicles passing the detection device 15, which are excited by appropriate means. It is also conceivable for the detection device 15 to be arranged on a rail vehicle itself and for the test object to be excited with corresponding means at intervals of time. In a further alternative embodiment variant, the detection device 15 is moved past the rail vehicle, for example in the form of a test car, which excites the test objects by appropriate means and the detection device 15 records the emitted sound 2.
    Reference symbol list
    1 test object 2 emitted sound 3 measurement data 4 reference data 5 reference database 6 deviation 7 tolerance range 8 error message 9 data record 10 database 11 external database 12 mobile terminal 13 evaluation unit 14 control center 15 detection device 16 communication unit
    权利要求:
    Claims (19)
    [1]
    1. A method for the non-destructive testing of test objects (1) in the form of wheels or wheel tires of a rail vehicle with sound, wherein a test object (1) attached to the rail vehicle is set into vibration by impulsive excitation, characterized in that- The sound (2) emitted by the test object (1) is recorded as measurement data (3) in a data set (9) in a system component;- The measurement data (3) recorded in this way are compared with reference data (4) from a reference database (5);- The comparison determines whether a deviation (6) of the recorded measurement data (3) from the reference data (4) lies within or outside an adjustable tolerance range (7);- In the event of a deviation (6) lying outside the tolerance range (7), an error message (8) is generated.
    [2]
    2. The method according to claim 1,characterized in thatthe data record (9) is stored in a database (10).
    [3]
    3. The method according to claim 2,characterized in thatin the data record (9) it is additionally noted whether the error message (8) was generated.
    [4]
    4. The method according to any one of claims 1 to 3,characterized in thatTo compare the recorded measurement data (3) and the reference data (4), a digital audio analysis is carried out and the audio analysis includes at least one frequency analysis.
    [5]
    5. The method according to claim 1 to 4,characterized in thatin the data record (9) also identification data for identifying the test object (1) and / or for identifying a test period and / or system components specific data for identifying the system component generating the data record (9) and optionally the position data of the system component or the test object (1) be recorded.
    [6]
    6. The method according to claim 4,characterized in thatthe reference database (5) is stored locally in the system component in which the measurement data (3) are recorded.
    [7]
    7. The method according to claim 5 or 6,characterized in thatthe recorded measurement data (3) or the data record (9) are transmitted wirelessly at least between the system component recording the measurement data (3) and a further system component and the wireless transmission is preferably carried out via WLAN, Bluetooth, NFC or mobile telecommunication networks.
    [8]
    8. The method according to claim 7,characterized in thatafter the comparison, the recorded measurement data (3) or the data record (9) is transmitted to a further database (11) for storing the recorded measurement data (3) or the data record (9).
    [9]
    9. The method according to claim 7,characterized in thatthe recorded measurement data (3) are transmitted wirelessly to a mobile terminal (12).
    [10]
    10. The method according to claim 7,characterized in thatthe measurement data (3) are recorded with a mobile terminal (12).
    [11]
    11. The method according to claim 9 or 10,characterized in thatthe comparison between the recorded measurement data (3) and the reference data (4) is carried out by means of the mobile terminal (12).
    [12]
    12. The method according to claim 9 or 10,characterized in thatthe recorded measurement data (3) are transmitted from the mobile terminal (12) to an evaluation unit (13) for the purpose of comparison with the reference data (4) and, depending on the detected deviation (6), the error message from the evaluation unit (13) to the mobile Terminal (12) is transmitted.
    [13]
    13. The method according to any one of claims 1 to 12,characterized in thatthe error message (8) an acoustic and / or haptic and / or visual feedback is generated.
    [14]
    14. The method according to any one of claims 1 to 13,characterized in thatan acoustic and / or haptic and / or visual feedback is generated when the measurement data (3) are recorded and / or the comparison is complete.
    [15]
    15. The method according to any one of claims 1 to 14,characterized in thatan acoustic and / or haptic and / or visual feedback is generated if the recording of the measurement data (3) has failed.
    [16]
    16. The method according to any one of claims 1 to 15,characterized in thatIf a deviation (6) is found which is outside the tolerance range (7), the error message (8) is transmitted to a control center (14) for rail vehicles.
    [17]
    17. The method according to any one of claims 1 to 16,characterized in thata detection device (15) for recording the emitted sound (2) is attached in a stationary manner and the sound (2) is emitted by the test object (1) guided past the detection device (15).
    [18]
    18. The method according to any one of claims 1 to 16,characterized in thata detection device (15) for recording the emitted sound (2) is moved relative to the test object (1) to be tested.
    [19]
    19. The method according to any one of claims 1 to 16,characterized in thata detection device (15) is arranged on the rail vehicle and the test object (1) is repeatedly stimulated at temporary, preferably periodic, intervals.
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    同族专利:
    公开号 | 公开日
    AT516462A1|2016-05-15|
    DE102015215399A1|2016-05-04|
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    GB2349467A|1999-04-29|2000-11-01|Paul Grant|Wheel testing system|
    EP2833115A4|2012-03-28|2015-11-11|Ntn Toyo Bearing Co Ltd|Railroad vehicle bearing malfunction sensing system|
    CN104364629B|2012-05-23|2017-08-29|国际电子机械公司|The track component inspection analyzed based on resonance signal|
    法律状态:
    2019-04-15| PUE| Assignment|Owner name: SIEMENS MOBILITY GMBH, AT Free format text: FORMER OWNER: SIEMENS AG OESTERREICH, AT |
    2019-12-30| PFA| Name/firm changed|Owner name: SIEMENS MOBILITY AUSTRIA GMBH, AT Free format text: FORMER OWNER: SIEMENS MOBILITY GMBH, AT |
    2021-04-30| PL| Patent ceased|
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    申请号 | 申请日 | 专利标题
    ATA50784/2014A|AT516462A1|2014-10-30|2014-10-30|Non-destructive testing of wheels or tires of a rail vehicle|
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