EP4237310A1 - System und verfahren zum überwachen des zustands eines rades eines schienenfahrzeugs - Google Patents
System und verfahren zum überwachen des zustands eines rades eines schienenfahrzeugsInfo
- Publication number
- EP4237310A1 EP4237310A1 EP21787368.6A EP21787368A EP4237310A1 EP 4237310 A1 EP4237310 A1 EP 4237310A1 EP 21787368 A EP21787368 A EP 21787368A EP 4237310 A1 EP4237310 A1 EP 4237310A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wheel
- output
- temperature
- determined
- operating parameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/04—Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/12—Measuring or surveying wheel-rims
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0081—On-board diagnosis or maintenance
Definitions
- the invention relates to a system and a method for monitoring the condition of a wheel of a rail vehicle, in particular during operation of the rail vehicle.
- EP 3 517 927 A1 discloses a method for detecting a Known crack in a wheel set of a rail vehicle.
- DE 198 33 027 C1 describes a method for testing a railway wheel.
- EP 1 485 704 A1 a device for electromagnetic and ultrasonic diagnosis of wheels is known from EP 1 485 704 A1.
- EP 3 206 933 A1 describes a method for diagnosing the condition of wheels on rail vehicles.
- this object is achieved by a system for monitoring the state of a wheel of a rail vehicle.
- a system for monitoring the state of a wheel of a rail vehicle comprises a detection unit which is set up to detect at least one operating parameter for the wheel during a braking event, an evaluation unit which is set up to use the detected operating parameter to calculate a temperature value for the wheel, and a control unit configured to generate and output an output as a function of the determined temperature value.
- the invention is based on the basic idea of being able to detect a structural change in the wheel during ongoing operation by means of temperature monitoring or thermal monitoring.
- the structure diagrams are known and can be stored in the system. Is achieved by the thermal monitoring, also, if necessary, by the time profile of the temperature (i.e. monitoring the temperature curve) and the corresponding adjustment or by monitoring the temperature curve alone without adjustment If it is recognized that a problematic structural transformation is taking place or could take place or is to be feared, a corresponding warning message is issued.
- the condition of the wheel can be monitored in particular while the rail vehicle is in operation. This is an important difference from known methods in which the monitoring takes place, for example, at predetermined time intervals and the rail vehicle has to be taken to a workshop, for example.
- the data recorded during the braking event are evaluated directly and conclusions about the state of the wheel can be output directly.
- monitoring or diagnostics can be performed to detect the formation of martensite and/or other indications of crack or fracture formation. Furthermore, it can be recognized that there is a risk of weakening of the material. In addition, the diagnosis can be used to detect the occurrence of hazards after braking with a disadvantageous adhesion profile.
- a basic idea of the invention is that a probability for the formation of martensite in the wheel of the rail vehicle is determined. This information is then used to identify whether the wheel needs to be checked, for example using a non-destructive testing method, and/or whether the wheel needs to be treated, for example using a lathe.
- the system makes use of the fact that the speeds of the wheels and the speed of the rail vehicle, ie a reference speed, can be recorded. These values are already being used, for example to detect or prevent wheel slippage. For example, a "wheel slide protection" system (WSP) or a similar system is used.
- WSP wheel slide protection
- values recorded by a brake control unit 1 (BCU) can also be used, in which, for example, the brake pressures applied by brake cylinders are recorded.
- the speeds of the wheels and the vehicle as well as the cylinder pressures of the braking system can be used in a simplified thermal model of the material of the tread of a wheel, in particular to determine a temperature distribution in the material.
- a model can be executed by the evaluation unit.
- a more detailed thermal model of the material of the tread of a wheel is necessary, for example for the simulation using a finite element method. Calculations based on such a model can require significant computing power and the calculations can take a long time. This usually excludes the use of such a detailed model on an evaluation unit provided directly in the vehicle. Instead, it can be provided that a table with temperature values and/or a characteristic curve is determined on the basis of the more detailed thermal model outside the rail vehicle, which the system then accesses; for example, a table and/or a characteristic curve can be stored on a memory unit of the system.
- an average temperature of the wheel can be calculated using the simplified thermal model and the locally occurring peak values can be determined by looking up a table, the values stored in the table having been determined with greater computational effort and using more complex models. Specifically, the peak values determined from the table are added to the average temperature.
- the time-temperature curves obtained in this way can be compared with material-specific curves that describe the conditions for certain changes in the metal structure.
- austenite such as a specific temperature increase for a specific time.
- cooling has subsequently taken place sufficiently quickly for the formation of martensite.
- a probability that the formation of martensite has occurred is determined.
- the probability for a specific wheel, a pair of wheels or a differently defined set of wheels can be determined.
- an error code may be generated, output, and/or stored that includes a particular probability of martensite formation in a wheel.
- the detection unit is also set up to detect a braking parameter, in particular a braking pressure of a brake cylinder and/or a braking force.
- the energy can advantageously be determined in a particularly simple and direct manner, which occurs during braking via the contact between the wheel and the rail must be derived. Furthermore, this operating parameter is usually particularly easily accessible via a brake controller of the rail vehicle.
- the operating parameter recorded for the wheel includes a wheel speed, in particular a rotational speed of the wheel, and/or a speed of the rail vehicle.
- the kinetic energy to be absorbed during braking can advantageously be determined simply using basic parameters of the operation of the rail vehicle. It can also be checked whether the wheel blocks when braking or whether it continues to rotate. In particular, the values mentioned can easily be detected by means of a control device which is usually already present and by means of which, for example, the wheel is prevented from slipping during braking.
- the operating parameter recorded for the wheel includes a time derivation of the wheel speed, in particular the rotational speed of the wheel, and/or the speed of the rail vehicle.
- a simple and/or multiple time derivation of the wheel speed, in particular the rotational speed of the wheel, and/or the speed of the rail vehicle can be recorded.
- the dynamics of the braking event are advantageously recorded in a particularly simple manner, and the energies that occur can be easily determined.
- the at least one operating parameter for the wheel can be detected using an anti-slip system.
- the detection unit is included in the anti-slip system or the anti-slip system can be used as a detection unit.
- an anti-skid system that is known per se and may already be present, such as can be integrated into a brake control system of the rail vehicle, are advantageously used for detecting the operating parameter.
- the system can thus be operated particularly efficiently. It can also be easily integrated into existing rail vehicles be integrated, since at best no new sensor devices have to be provided.
- the rail vehicle has an anti-slip system (“wheel slide protection system”, WSP), by means of which the operating parameter for the wheel is recorded. Furthermore, it can be provided that at least one of several operating parameters recorded for the wheel is recorded by the anti-skid system.
- WSP wheel slide protection system
- WSP systems are usually already designed in such a way that a wheel speed, a vehicle speed and/or a brake pressure are detected. It is therefore particularly easy to access this already existing data.
- the temperature value determined for the wheel includes an average temperature of a running surface of the wheel and/or a temperature distribution along the running surface of the wheel and/or a temperature on a contact surface of the wheel. In particular, it is determined whether the wheel continues to rotate when braking or whether it locks and slides on the rail.
- phase transitions or structural changes can occur which, for example, promote the development of expanding damage areas, such as cracks.
- the evaluation unit is set up to determine the average temperature of the running surface of the wheel when determining the temperature value for the wheel using a simplified thermal model and to determine temperature peaks using a look-up table.
- an analysis method that can be carried out with a manageable amount of computing effort is advantageously combined with more complex simulation methods.
- the simplified thermal model makes it possible to determine the average temperature of the tread with sufficient accuracy practically in real time based on the recorded operating parameter.
- the analysis can be carried out, for example, by a computing unit in the rail vehicle itself.
- the determination of the temperature peaks that can occur during a braking process is usually carried out using very computationally intensive methods and therefore typically cannot be carried out in real time, at least not with the usual on-board resources of a rail vehicle. Therefore, simulations can be used to determine values under various conditions and store them in a look-up table.
- the evaluation unit is then set up to determine and use the value or values from the look-up table that match the currently recorded operating parameters. In this case, the lookup replaces the completely new calculation and allows the results to be sufficiently accurate.
- the temperature at a contact surface of the wheel with the rail can also be determined using the simplified thermal model.
- control unit is set up to generate the output depending on at least one temperature threshold value being reached.
- the output can also be generated as a function of a change over time in the detected operating parameter.
- control unit is also set up to determine a probability of occurrence of a damaged area, in particular a probability of martensite formation, and to generate the output as a function of at least one probability threshold value.
- the output can then include information about the probability of which problems to expect and countermeasures can be taken in a targeted manner, for example certain maintenance measures.
- the output includes a warning message and/or a diagnostic message and/or an error code.
- the control unit is optionally set up to store the output in a diagnostic memory.
- the output can advantageously be read out later, for example by an authorized user.
- the output can also be output directly. For example, depending on the output, an optically or acoustically perceptible signal can be generated. For example, if the output includes a particular error code, a first signal may be output, and if the output includes another error code, a second signal may be output.
- the signal can be used, for example, to issue a request to carry out a specific maintenance measure.
- At least one operating parameter for the wheel is detected when a braking event occurs.
- a temperature value for the wheel is determined on the basis of the detected operating parameter and an output is generated and output as a function of the determined temperature value.
- the method is designed in particular to operate the system. It therefore has the same advantages as the system.
- 1A shows an embodiment of the system.
- FIGS. 2A and 2B show schematic representations of a wheel under different braking conditions.
- Figure 4 shows a cross-sectional view of a wheel and rail.
- 5 shows characteristics relating to the formation of austenite.
- Fig. 6 shows characteristics relating to the generation of martensite.
- FIG. 1A shows an exemplary embodiment of a system 100 according to the invention.
- system 100 is integrated into a rail vehicle 10 or a subsystem of a rail vehicle 10.
- the rail vehicle 10 thus has the system 100 .
- the system has a detection unit 20 .
- the detection unit 20 is part of an anti-slip device 30 which is formed in a manner known per se in the manner of a WSP (wheel slide protection) system.
- WSP wheel slide protection
- the system 100 also has an evaluation unit 40 .
- the system 100 also has a control unit 50 .
- the acquisition unit 20 is set up to acquire at least one operating parameter for the wheel in the event of a braking event.
- the detection unit 20 can further be set up to detect the presence of the braking event itself, something by detecting an activity of a brake cylinder.
- the evaluation unit 40 is set up to determine a temperature value for a wheel of the rail vehicle 10 based on the detected operating parameter.
- the control unit 50 is set up to generate and output an output as a function of the determined temperature value.
- the function of the system 100 can basically be described as follows:
- Data is recorded by means of the recording unit 20, by means of which the evaluation unit 40 monitors the temperature.
- a temperature or a development of the temperature over time is determined, which occurs at a wheel during a braking event.
- This thermal monitoring is used to identify during ongoing operation of the rail vehicle 10 whether the conditions for a specific structural change in the wheel are present.
- microstructure diagrams known per se are used in particular.
- the System 100 enables the following advantages:
- Critical states of the wheel can be detected while the rail vehicle 10 is in operation, and operational safety can be improved.
- Such critical states can be pointed out, in particular in direct temporal connection with their occurrence and/or at a later point in time.
- maintenance or repair measures can be initiated, for example to remedy damage to the wheel that has occurred or is to be feared during the braking event.
- 1B shows an exemplary embodiment of the method which is explained below.
- the starting point here is in particular the exemplary embodiment of the system explained above with reference to FIG. 1A, which is specified in more detail by the following explanations.
- a step S10 at least one operating parameter for the wheel is recorded when a braking event occurs.
- a force is determined at a contact surface between the wheel and the rail.
- Data is collected about the speed of the wheel.
- a braking force of a braking system of the rail vehicle is recorded.
- the exemplary embodiment provides for a control unit of an anti-slip device (WSP) to process the operating parameters and data recorded.
- WSP anti-slip device
- An energy is determined which is absorbed by the wheel via the contact surface.
- the variables that occur can include a braking force P(t) and a wheel speed V W heei(t), which each depend on the time t and are recorded in particular as a function of the time t.
- a simplified thermal model of the wheel is used. It is checked whether the wheel rotates during braking or whether it locks and slides over the rail (wheel lock-up). Especially the values recorded or determined in step S10 are used in the model.
- an average temperature Tmodei(t) of the tread of the wheel is determined as a function of time t.
- the temperature Tmodei(t) for the contact area between the wheel tread and the rail is determined as a function of time t.
- a step S30 the temperature Tmodei(t) determined using the simplified model is modified.
- Parameters are used that were previously determined by simulation using an FEM method. These parameters are provided, for example, by a storage unit.
- a modified Tmodified(t) is determined depending on the time t.
- a step S40 the temperature Tmodified(t) determined in this way is compared with a predefined diagram which includes a characteristic curve which characterizes the prerequisites for austenitization of the material of the wheel or its running surface.
- FIG. 5 An example diagram 500 that can be used in step S40 is shown in FIG. 5 .
- step S70 it is checked whether austenitization has taken place. If this is not the case, it is determined in step S70 that there is no risk of martensite formation.
- step S40 if determined in step S40 that the conditions for a
- a step S50 the determined Temperature Tmodified (t) compared with a predetermined further diagram, which includes a characteristic that characterizes the prerequisites for the formation of martensite for the material of the wheel or its tread.
- FIG. 600 An example diagram 600 that can be used in step S50 is shown in FIG.
- step S70 it is checked whether the prerequisites for the formation of martensite are present, especially if the material cools down sufficiently quickly. If this is not the case, it is again determined in step S70 that there is no risk of martensite formation.
- step S50 determines that the prerequisites for the formation of martensite are present, for example sufficiently rapid cooling, then it is determined in step S60 that there is a risk of martensite formation.
- an output is then generated and output.
- This includes, for example, an error code which indicates whether or not there was a risk of martensite formation.
- a probability with which martensite has formed is also determined in step S60.
- the output generated may include this probability.
- step S70 a probability can be determined with which martensite has formed.
- the output generated may include this probability.
- a threshold value can be specified and the determined value of the probability that martensite has formed can be compared with the threshold value. Then the output can be in Depending on this comparison are generated. For example, an alert can be generated and issued when the threshold has been exceeded.
- the detection unit 20 can include sensors of the MGS3 type, for example.
- the values and parameters recorded by the recording unit 20 make it possible to determine the instantaneous heat on the wheel surface in real time or almost in real time. Even with current anti-skid systems (WSP, "wheel slide protection 11 ), it is not always possible to prevent the wheels from being overloaded, particularly as a result of the input of energy or heat during a braking process. However, based on the data recorded by the anti-skid system, it can be detected that sliding is occurring and/or the duration of a sliding process of a wheel or a wheelset can be determined. A suitable thermal model of the wheel and known material properties of the wheel can be used to determine whether and how transitions between different material states occur, for example between different microstructures or phases of a metal material.
- a diagnostic memory can be read out at regular intervals, for example monthly or on specific occasions, for example during regular maintenance of the wheel or wheel set.
- the data stored in the diagnostic memory can be used to determine whether the wheel should be treated with a lathe. Furthermore, based on the data stored in the diagnostic memory, it can be determined that no treatment with a lathe is required. Furthermore, can based on the data stored in the diagnostic memory, it can be determined that a non-destructive diagnosis of the wheel or wheel set, for example by means of ultrasound, should be carried out in order to detect cracks and/or local changes in the hardness of the material.
- a model is described below by way of example, by means of which the formation of a potentially hardened material texture can be determined.
- martensite formation can be determined and/or a probability is determined that martensite formation has occurred during a braking event.
- the wheel speed, the vehicle speed and the brake pressure applied by a brake cylinder are detected by means of the sensors included in the detection unit.
- a simplified thermal model is accessed, which is provided, for example, by means of the evaluation unit.
- the simplified thermal model can be provided, for example, on a plug-in card and/or a computing unit of a central control unit.
- the energy absorbed by the wheel is first determined, for example according to the following model, which is explained with reference to Fig. 2A and Fig. 2B and Fig. 4:
- the sliding speed is multiplied by the actual braking force at the contact between the wheel 210, 420 and the rail 440 .
- a contact force is determined based on the pressure of the brake cylinders. Furthermore, the angular acceleration of the wheelset is also taken into account, where J denotes a moment of inertia of the wheels:
- Fi designates the braking force that acts on an individual wheel 210, 420 at the contact surface between wheel 210, 420 and rail 440. This is a direct function of the actual brake pressure p c .
- This function F(p c ) can be determined, for example, using the general calculations of a braking process, as described in UIC 544-1.
- the surface temperature can then be determined, taking into account in particular that in this case the heat can quickly be partitioned by around 50% permanently, ie around 50% of the heat generated is absorbed by the wheel. This is described, for example, in P.T. Zwierczyk, "Thermal stress analysis of a railway wheel-rail rolling-sliding contact", Budapest 2015. Other models can be assumed to have a different partition, for example depending on certain environmental parameters.
- a simplified thermal model of the wheel 210, 420 can be determined.
- Fig. 3 shows an example of a temperature profile determined according to this modified model: At the peaks in temperature, the observed point on the running surface of the wheel 210, 420 touches the rail 440 and absorbs heat, then the contact is broken and the point cools down again .
- the average temperature of the wheel is shown as a dashed line, the temperature with additional peaks is shown as a solid line.
- Fig. 2A the model is shown for the case that the wheel is rotating, while in Fig. 2B the case is shown that the wheel 210, 420 is blocked ("lock-up" with the wheel 210, 420 over the rail 440 slides.
- Tdrcie denotes a temperature of the tread, specifically an average temperature.
- the mass of the tread 220 is pre-calculated in the example.
- the Kalker method can be used, for example, in which the radius of the wheel 210 and the width of the surface 220 are determined specifically for the vehicle. Furthermore, the depth of the tread can be calculated using simulations. The result is roughly the following representation:
- a temperature Tspot of the contact point 230 can be determined in a model for the case shown in FIG. 2B.
- the area of the contact point 230 can be assumed to be approximately 1 cm 2 in area and 2 mm in depth.
- the area can be calculated specifically for the vehicle.
- the Kalker method can be used for this, for example.
- the depth of the tread can be calculated using simulations.
- FIG. 3 shows an example of how the temperature changes at a point in the area of the tread of the wheel 210 , 420 during braking when the wheel 210 , 20 rotates during a braking process.
- the increase in the average temperature in the area of the tread is shown as a dashed line 310 .
- those shown as solid line 320 are Temperature peaks have to be taken into account, whereby the peaks will occur when the point contacts the rail and absorbs energy, while the energy is then released again and the temperature correspondingly decreases again (Source: PT Zwierczyk, "Thermal stress analysis of a railway wheel-rail rolling-sliding contact”, Budapest 2015).
- the average temperature along the circumference of the tread 230 changes slowly compared to the temperature peaks.
- the average temperature is determined using the simplified model discussed above with reference to Figure 2A.
- at least one parameter is determined by fitting using a finite element method (FEM), in particular the dashed line 310 in FIG.
- FEM finite element method
- a temperature versus time curve can now be used, such as from the data shown in FIG.
- the temperature changes during the braking event are taken into account, that is to say in particular temperature increases and temperature drops.
- the diagram represents a time-temperature transformation diagram (continuous cooling transformation, CCT).
- a material composition as follows is assumed: 0.33% C, 1.12% Mn, 0.30% Si, 0.027% S, 0.018% P, 0.24% Ni, 0.11% Cr, 0 .04% Mo, 0.19% Cu, 0.010% Al, grain size 8-9, austenitized at 850°C (1562°F) for 1 h.
- FIG. 6 shows a CCT diagram 600 for an exemplary steel as the material of the wheel. This graph relates the texture of the material as a function of cooling rate.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020128188.9A DE102020128188A1 (de) | 2020-10-27 | 2020-10-27 | Verfahren zum Überwachen des Zustands eines Rades eines Schienenfahrzeugs |
| PCT/EP2021/077261 WO2022089880A1 (de) | 2020-10-27 | 2021-10-04 | System und verfahren zum überwachen des zustands eines rades eines schienenfahrzeugs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4237310A1 true EP4237310A1 (de) | 2023-09-06 |
| EP4237310B1 EP4237310B1 (de) | 2025-05-14 |
Family
ID=78085668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21787368.6A Active EP4237310B1 (de) | 2020-10-27 | 2021-10-04 | System und verfahren zum überwachen des zustands eines rades eines schienenfahrzeugs |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20230406374A1 (de) |
| EP (1) | EP4237310B1 (de) |
| CN (1) | CN116507546A (de) |
| DE (1) | DE102020128188A1 (de) |
| WO (1) | WO2022089880A1 (de) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19627731A1 (de) * | 1996-07-10 | 1998-01-15 | Abb Patent Gmbh | System für die Antriebs- und Bremsensteuerung eines Schienenfahrzeuges |
| DE19833027C1 (de) | 1998-07-23 | 2000-03-09 | Siemens Ag | Verfahren und Vorrichtung zum Prüfen eines Eisenbahnrads |
| AU2002367788A1 (en) | 2002-03-18 | 2003-09-29 | Deutsche Bahn Ag | Device for the electromagnetic ultrasonic diagnosis of wheels |
| DE102007060032A1 (de) * | 2007-12-13 | 2009-06-25 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Verfahren und Regeleinrichtung zur Antriebs- und Bremskraftkontrolle eines Fahrzeugs sowie ein Fahrzeug mit der Regeleinrichtung |
| IT1396005B1 (it) * | 2009-06-29 | 2012-11-09 | Gen Electric | Sistema e metodo di rilevamento di surriscaldamenti anomali in veicoli per trasporto stradale in movimento |
| EP2674504A1 (de) | 2012-06-11 | 2013-12-18 | Siemens S.p.A. | Verfahren und System zur Wärmebehandlung von Schienen |
| AT516487A1 (de) | 2014-10-16 | 2016-05-15 | Siemens Ag Oesterreich | Zustandsdiagnose von Schienenfahrzeugrädern |
| WO2018133922A1 (en) * | 2017-01-17 | 2018-07-26 | Siemens Aktiengesellschaft | Method for determining a parameter of a wheel of an observed railway vehicle and evaluation unit |
| EP3517927B1 (de) | 2018-01-24 | 2020-11-18 | Vibro-Consult AG | Verfahren und vorrichtung zur früherkennung eines risses in einem radsatz für ein schienenfahrzeug |
| EP4137375B1 (de) * | 2018-07-12 | 2024-12-18 | Amsted Rail Company, Inc. | Bremsüberwachungssysteme für schienenfahrzeuge |
| CN110217266A (zh) * | 2019-06-21 | 2019-09-10 | 中国神华能源股份有限公司 | 列车制动状态下异常车轮识别系统及方法 |
| CN110626382A (zh) * | 2019-09-19 | 2019-12-31 | 中铁第四勘察设计院集团有限公司 | 一种动车组轮对车载检测装置及方法 |
| CN111791916A (zh) * | 2020-07-17 | 2020-10-20 | 成都盛锴科技有限公司 | 一种车轮踏面温度在线动态检测方法及系统 |
-
2020
- 2020-10-27 DE DE102020128188.9A patent/DE102020128188A1/de active Pending
-
2021
- 2021-10-04 WO PCT/EP2021/077261 patent/WO2022089880A1/de not_active Ceased
- 2021-10-04 US US18/034,299 patent/US20230406374A1/en active Pending
- 2021-10-04 EP EP21787368.6A patent/EP4237310B1/de active Active
- 2021-10-04 CN CN202180073303.4A patent/CN116507546A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102020128188A1 (de) | 2022-04-28 |
| EP4237310B1 (de) | 2025-05-14 |
| WO2022089880A1 (de) | 2022-05-05 |
| US20230406374A1 (en) | 2023-12-21 |
| CN116507546A (zh) | 2023-07-28 |
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