EP4277825A1 - Verfahren zur erkennung einer fehlfunktion eines überwachungssystems - Google Patents
Verfahren zur erkennung einer fehlfunktion eines überwachungssystemsInfo
- Publication number
- EP4277825A1 EP4277825A1 EP22708749.1A EP22708749A EP4277825A1 EP 4277825 A1 EP4277825 A1 EP 4277825A1 EP 22708749 A EP22708749 A EP 22708749A EP 4277825 A1 EP4277825 A1 EP 4277825A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- monitoring
- rail vehicle
- monitoring system
- signal
- malfunction
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
- B61L25/02—Indicating or recording positions or identities of vehicles or trains
- B61L25/021—Measuring and recording of train speed
Definitions
- the invention relates to a method for detecting a malfunction or a malfunction or a defect in a monitoring system, which is used to monitor the running stability of a rail vehicle during operation of the rail vehicle in a monitoring operating area.
- Acceleration sensors are used in many technical areas. For example, a
- Acceleration sensor used in a vehicle to increase the safety of the vehicle.
- the lateral acceleration of the vehicle can be measured by means of the acceleration sensor and a warning can be given of high acceleration values, e.g. B. to ensure the safety of the occupants of the vehicle and / or in the case of a rail vehicle to prevent damage to the tracks.
- the acceleration sensor can be used to measure the transverse acceleration of the rail vehicle or of an individual car, in particular in order to monitor the so-called sine run of the rail vehicle.
- the sinusoidal run of a rail vehicle also known as wave run, can be understood as an oscillation of the rail vehicle around its ideal driving line. This oscillation can be made rigid by (approximately) conical, outwards tapering, about one axis coupled wheels are caused and occurs particularly strongly at high speeds of the rail vehicle. If the wheels are off-center on two parallel rails, the wheel that is offset to the outside rolls with a larger circumference, causing the axle to turn. The wheelset of the rail vehicle or wagon undergoes lateral acceleration. High lateral acceleration causes high forces in the wheel-rail contact, which can lead to track damage or loss of tracking.
- an acceleration sensor can have a malfunction or a malfunction or a defect that leads to a malfunction of the monitoring system, for example due to a broken wire or a short circuit within the sensor or in the measurement chain.
- the acceleration sensor may then deliver faulty signals.
- the erroneous signals can, for example, lead to a false alarm, i. H. a warning is issued although the situation is not critical.
- faulty signals can lead to critical situations not being recognized and consequently no warning being incorrectly issued. It is therefore desirable to be able to reliably detect a malfunction of an acceleration sensor.
- DE 102015 218 941 A1 describes a method for detecting a defect in an acceleration sensor that is arranged in a rail vehicle and to a
- the acceleration sensor generates a signal and a check is carried out to determine whether a variable dependent on the signal satisfies a specified condition with regard to a reference value.
- the test is used to determine whether the acceleration sensor is defective.
- the object of the invention is to improve the running stability monitoring of a rail vehicle, in particular the reliability of the to increase detection of a malfunction of the monitoring system used for running stability monitoring.
- This object is achieved by a method according to the invention for detecting a malfunction of a monitoring system, which is used to monitor the running stability of a rail vehicle during operation of the
- Rail vehicle is used in a monitoring operation area, solved.
- an acceleration sensor of the monitoring system generates a signal during operation of the rail vehicle.
- a variable dependent on the signal is used to check whether the monitoring system is malfunctioning. The test is carried out during operation of the rail vehicle in an operating area in which the monitoring system does not monitor running stability.
- monitoring systems are often only relevant and active in predetermined operating areas.
- the monitoring system often monitors the running stability of the rail vehicle exclusively in a monitoring operating area provided for monitoring, in which the monitoring system is relevant and active.
- the core of the invention is to use an operating range for detecting a malfunction of the monitoring system, which is outside the monitoring operating range. For example, in this operating range, the running stability monitoring is not used to detect instabilities, but for self-diagnosis.
- the signal generated by the acceleration sensor is checked for plausibility during the period in which the monitoring system is inactive. This enables signal-based failure detection in a dynamic environment, taking mechanical boundary conditions into account. Conducting the exam outside of the
- Monitoring operating range has several advantages. Certain malfunctions also or exclusively occur outside the monitoring operating range and can be detected more reliably using the method according to the invention.
- running the test during operation (outside the monitoring operating range) has the additional advantage that the complete signal chain can be tested under real environmental conditions over a longer period of time. These real conditions with a complete signal chain can only partially be simulated on a test stand. Accordingly, recurring defects and random errors can be reliably detected by the solution according to the invention.
- the acceleration sensor preferably measures accelerations on the chassis, in particular the bogie, of the rail vehicle. If the accelerations have specified patterns with specified amplitudes, the running behavior is classified as unstable. One reaction to this is, for example, a reduction in driving speed.
- test is carried out during operation of the rail vehicle in an operating area in which the monitoring system does not carry out any running stability monitoring
- the test is carried out during operation of the rail vehicle outside the monitoring operating area. In other words: the test is carried out while the surveillance system is idle.
- the failure can be caused, for example, by a broken wire or a short circuit within the monitoring system, in particular within the acceleration sensor.
- detection of a malfunction to mean the detection of a malfunction of the monitoring system, in particular of the acceleration sensor.
- detection of a malfunction to mean the detection of an incorrect detection of a running instability (i.e. a detection of a running stability that actually does not exist). This can, for example, be caused by external influences, such as the infrastructure, on the vehicle. Under infrastructure in this sense, for example, a worn rail head is to be understood. Incorrect detections can also be caused by defects in the signal transmission or by random errors in the evaluation.
- the solution according to the invention is particularly suitable for this type of detection of a malfunction, since the occurrence of a detection of a Running stability in the operating range that is outside the monitor operating range is an indication of a malfunction of this type.
- a test unit can check whether the variable dependent on the signal satisfies the specified condition.
- software for carrying out the test can be stored in the test unit.
- the test unit receives the signal generated by the acceleration sensor and/or the variable dependent on the signal, preferably directly or indirectly from the acceleration sensor.
- the variable dependent on the signal can, among other things, be a signal value, ie a value of the signal generated by the acceleration sensor.
- the signal is expediently a voltage signal. This means that the quantity can be a voltage or a voltage value. Alternatively, the signal is a current signal. The quantity can be an amperage or an amperage value.
- variable dependent on the signal is a variable calculated by averaging a plurality of signal values that follow one another in time. This means that a number of signal values that follow one another in terms of time are preferably averaged before the test is carried out.
- the signal can be smoothed by averaging.
- a period of time for which the averaging is carried out can preferably be specified.
- the averaging can e.g. B. be a root mean square.
- the averaging can be an arithmetic averaging of the amounts.
- the magnitude of each signal value is expediently first formed and then an arithmetic averaging of a plurality of signal values is carried out.
- the averaging can be a so-called sliding averaging, i. H. a moving average can be calculated for each signal value.
- the reference value can depend on the type of averaging.
- the signal from the acceleration sensor is preferably filtered using a filter. Furthermore, the check is advantageously carried out for the filtered signal.
- the filtering of the signal is preferably performed before the test.
- the signal is preferably filtered before the signal values are averaged.
- By filtering the signal those frequencies and/or frequency bands in which no mechanical vibrations of the rail vehicle are to be expected can be weakened.
- interference frequencies and/or an offset voltage in the signal can/can be attenuated or filtered out of the signal by the filtering.
- signal noise can be reduced by filtering the signal. To this way, an evaluation of the signal and/or a calculation of an acceleration can be facilitated.
- the filter is a bandpass filter.
- the bandpass filter expediently allows that frequency range to pass in which mechanical vibrations of the rail vehicle are to be expected. Using a bandpass filter, those frequencies and/or frequency bands can be attenuated or filtered out of the signal in which no mechanical vibrations of the object are to be expected.
- the filter can be a high-pass filter.
- the offset voltage in the signal is expediently attenuated or filtered out of the signal by the high-pass filter.
- the high-pass filter preferably allows that frequency range to pass in which mechanical vibrations of the rail vehicle are to be expected.
- the filter can be a low-pass filter.
- the low-pass filter preferably allows that frequency range to pass in which mechanical vibrations of the object are to be expected.
- the low-pass filter expediently attenuates or filters out frequencies that are higher than the expected frequencies of the mechanical vibrations.
- the signal from the acceleration sensor can be filtered using a filter combination from several different filters.
- the aforementioned reference value is preferably a maximum value of a measurement range of the acceleration sensor.
- the maximum of the measuring range of the acceleration sensor can be taken as the maximum value.
- the check it is preferably checked whether the variable, in particular an averaged signal value and/or an averaged acceleration value, exceeds a predetermined multiple of the reference value.
- the multiple can be a rational number.
- the multiple can also be one, ie it can be checked whether the size exceeds the reference value. If the size is the specified If this exceeds a multiple of the reference value, there is usually a malfunction in the acceleration sensor. It is expediently interpreted as a malfunction of the acceleration sensor or a malfunction of the acceleration sensor is recognized when the variable exceeds the specified multiple of the reference value.
- a filter in particular a filter connected downstream of the acceleration sensor, can be checked for its functionality. For example, the filter may be malfunctioning if the magnitude exceeds the specified multiple of the reference value.
- the filter and/or the acceleration sensor can be checked and, if necessary, the defective element can be repaired or replaced. Furthermore, during the check, using an auxiliary variable that is determined independently of the signal from the acceleration sensor, it can be checked whether the variable dependent on the signal is plausible.
- the auxiliary variable can be a state variable, for example, which characterizes a state of the object in which the acceleration sensor is arranged.
- the auxiliary variable can be a speed of the rail vehicle.
- the auxiliary size z. B. be determined using a measuring device, in particular using a speed measuring device. In particular, during the test it can be checked whether an acceleration determined from the signal is plausible given a speed of the rail vehicle determined independently of the acceleration sensor.
- the method according to the invention can be used for a multi-stage recognition. Signal values that are above the detection range (of detectable accelerations) of the acceleration sensor, for which neither a short circuit nor a wire break was detected, indicate a malfunction (e.g. a defect) in the signal chain or data processing. In this way, maintenance measures can be planned in a targeted manner.
- the check is carried out during operation of the rail vehicle in the monitoring operating area in which the monitoring system carries out the running stability monitoring.
- the test during operation of the rail vehicle in the operating area in which the monitoring system does not monitor running stability is carried out as a supplement.
- the check during operation of the rail vehicle in the operating range in which the monitoring system does not carry out any running stability monitoring is therefore used to check the detection of the malfunction of the monitoring system for plausibility.
- the check is carried out to determine whether the monitoring system is malfunctioning while the rail vehicle is being operated in the monitoring operating area.
- the checking takes place additionally (supplementary) during the operation of the rail vehicle in the operating range in which the monitoring system does not carry out any running stability monitoring.
- the reference value used in the monitoring operating range can correspond to the reference value used in the operating range in which the monitoring system does not carry out running stability monitoring.
- the known limit values that are used in the monitoring operating range can be used to detect the malfunction.
- the reference value can be used specifically for detecting malfunctions in the operating range in which the monitoring system does not perform running stability monitoring.
- the reference value can be selected to be smaller, since the expected accelerations have lower absolute values at lower speeds.
- the respective operating range preferably the
- the monitoring operating range is at a speed of the rail vehicle which is above a predetermined lower speed limit of the monitoring operating range.
- This embodiment is based on the finding that a running gear of a rail vehicle has a so-called basic stability: Accordingly, there is a driving speed (ie speed of the rail vehicle) at which the running gear runs stably.
- the basic stability is, among other things, by a
- the lower speed limit mentioned above is preferably in the range of the speed that characterizes the basic stability (hereinafter: basic stability speed).
- the lower speed limit is, for example, in a range from 120 to 160 km/h, for example 140 km/h.
- the operating range in which the monitoring system does not monitor running stability corresponds to a speed range below a specified upper speed limit.
- the speed range below the specified upper speed limit the speed range below the specified upper speed limit
- Running stability monitoring is not used to detect instabilities but, for example, for self-diagnosis and consequently to detect a malfunction of the monitoring system.
- the upper speed limit is below one
- Monitor operating range lower speed limit is below base stability speed.
- the upper speed limit is below the lower speed limit of the monitor operating range.
- the speed cap is 90% of the base stability speed.
- the speed range below the specified upper speed limit preferably does not extend to standstill, but rather to a very slow speed, for example 20 km/h.
- the speed of the object is expediently measured using a speed measuring device. It is also expedient if the speed measuring device works independently of the acceleration sensor, so that a malfunction of the acceleration sensor is not necessarily accompanied by a malfunction of the speed measuring device.
- variable dependent on the signal is based on the Acceleration determined by the signal (or an acceleration value determined on the basis of the signal).
- a voltage offset of the acceleration sensor is monitored, checking the acceleration determined using the signal enables a reliable check. This is because, in the event of a malfunction of the acceleration sensor, the acceleration sensor can supply a correct offset voltage but an incorrect acceleration value (e.g. always zero).
- variable can be another variable derived or determined from the signal of the acceleration sensor. It makes sense for the reference value to be a value of the same physical quantity.
- the acceleration sensor is a sensor for measuring an acceleration perpendicular to a direction of travel of the rail vehicle. That is, the acceleration can be a lateral acceleration.
- the acceleration sensor expediently measures the actual transverse acceleration of subsystems of the rail vehicle when it is free from malfunctions.
- the monitoring system is temporarily deactivated when a malfunction of the monitoring system is detected.
- externally induced vibrations which are caused by the infrastructure, for example, do not lead to permanent restrictions in operation.
- the temporary deactivation can be lifted after a predetermined period of time. Will the malfunction after If the cancellation is detected again, the monitoring system can be temporarily deactivated again.
- the monitoring system is no longer used for running stability monitoring if a malfunction of the monitoring system is repeatedly detected. A check by a maintenance measure is required.
- the monitoring system is permanently disabled and will only be used again after a maintenance measure has been carried out.
- a warning is issued if a malfunction of the monitoring system is detected.
- the warning can be an acoustic and/or visual warning, for example. If such a warning is present, the monitoring system can be checked and, if necessary, repaired or replaced.
- the signal from the acceleration sensor is filtered by means of a frequency filter.
- the frequency filter is matched to frequencies of a signal which the acceleration sensor generates while the malfunction is being detected.
- the frequency filter is preferably adapted in such a way that characteristic frequencies of the signal which the acceleration sensor generates while the malfunction is being detected are filtered out. This embodiment is particularly suitable for detecting a malfunction caused by an external impact on the vehicle.
- the frequency filter is, for example, the high-pass, low-pass and/or band-pass filter described above.
- the invention also relates to a device for detecting a malfunction of a monitoring system, which is used to monitor the running stability of a rail vehicle during operation of the rail vehicle in a monitoring operating area.
- the device includes an acceleration sensor of the monitoring system, which is designed to generate a signal during operation of the rail vehicle.
- the device also includes a test device, which is designed to check whether the monitoring system is malfunctioning using a variable that is dependent on the signal.
- the test device is also designed to carry out the test during operation of the rail vehicle in an operating area in which the monitoring system does not monitor running stability.
- the invention also relates to a rail vehicle with a device of the type described above.
- the invention also relates to a computer program, comprising instructions which, when the program is executed by the device of the type described above, cause it to carry out the method of the type described above.
- the invention also relates to a computer-readable storage medium comprising instructions which, when executed by a device of the type described above, cause to carry out the method of the type described above.
- Figure 1 schematically shows the sequence of a
- FIG. 2 shows the structure of an exemplary embodiment of a rail vehicle according to the invention
- FIG. 1 shows a flowchart which represents the sequence of the method according to the invention for detecting a malfunction of a monitoring system.
- FIG. 2 schematically shows a rail vehicle 2 with a device 1 according to the invention.
- the speed axis shown in FIG. 3 represents the order of magnitude of the speed values and intervals described below, without being true to scale.
- the device 1 includes a monitoring system 4 and a test device 5.
- the monitoring system 4 includes an acceleration sensor 6 and a monitoring unit 8.
- the rail vehicle 2 also includes a speed measuring device 10 for determining a speed v of the rail vehicle 2
- the speedometer 10 includes a speed sensor and determines the driving speed v based on a speed of a wheel set axle 12 of the rail vehicle 2.
- the acceleration sensor 6 and the speed measuring device 10 of the rail vehicle 2 are arranged on the wheel set axle 12 of the rail vehicle 2.
- the monitoring unit 8 includes a high-pass filter 14 and a band-pass filter 16.
- the acceleration sensor 6 is a sensor for measuring a transverse acceleration a of the rail vehicle 2.
- the monitoring unit 8 is used to process the signal generated by the acceleration sensor 6. If the acceleration sensor 6 is fault-free, the acceleration sensor 6 accordingly measures the lateral acceleration of the attachment point on the rail vehicle 2. This means that the acceleration sensor 6 generates a signal in the form of a voltage which is dependent on the lateral acceleration a of the rail vehicle 2. A lateral acceleration calculated from the signal therefore corresponds to the true lateral acceleration if the monitoring system 4 does not have a malfunction. In the event of a malfunction of the monitoring system 4, on the other hand, the transverse acceleration calculated from the signal does not necessarily correspond to the true transverse acceleration of the rail vehicle 2.
- the measurement of the transverse acceleration of the rail vehicle 2 is used to monitor the running stability of the rail vehicle 2 by the monitoring system 4.
- Run stability monitoring performed by the monitoring system 4 during operation of the rail vehicle 2 in a monitoring operating range dvo (vi , V2).
- the monitoring operating range dvo is characterized by a driving speed v of the rail vehicle 2 . i.e. if the driving speed v is within the monitoring operation range dvo (vi ⁇ v ⁇ V2), running stability monitoring can be reasonably performed.
- V2 corresponds to the maximum vehicle speed.
- the driving speed v G which represents the basic stability of the rail vehicle 2 (also referred to below as the basic stability speed) is in a lower sub-range of the monitoring operating range dvo: vi ⁇ v G ⁇ v 2 .
- the acceleration sensor 6 measures a lateral acceleration of the rail vehicle 2 in a method step A1 and thereby generates a signal.
- the signal generated by the acceleration sensor 6 is filtered and averaged in a method step A2 and the individual signal values are each converted into an acceleration value using a clear conversion rule.
- the bandpass filter 16 is a filter for the frequency range from 3 to 9 Hz. Mechanical vibrations typically occur in the frequency range from 3 to 9 Hz due to transverse accelerations a of the rail vehicle 2 . Accordingly, the bandpass filter 16 allows the frequency range from 3 to 9 Hz to pass.
- the running behavior is classified as unstable. In response to this, the driving speed v is reduced.
- Reducing the driving speed is a correct reaction when the running behavior is actually unstable.
- reducing the driving speed should be avoided if the acceleration values determined are on a Malfunction of the monitoring system 4 based.
- the driving speed v is permanently reduced. This leads to delays in operation, unnecessary visits to the workshop and thereby reduces the availability of the rail vehicle 2. It is therefore desirable to increase the reliability of the running stability monitoring.
- the device 1 is also designed to detect a malfunction of the monitoring system 4 .
- the testing device 5 is set up to detect a defect in the acceleration sensor 6 or in other parts of the monitoring system 4 or in processes that are carried out by the monitoring system 4 . These processes can be, for example, the processing and evaluation of signals from acceleration sensor 6 or variables based on these signals.
- the checking device 5 checks whether a variable dependent on the signal from the acceleration sensor 6 satisfies a predetermined condition with regard to a reference value.
- the variable dependent on the signal is the transverse acceleration a described above.
- the test device 5 determines in a method step A4 whether the acceleration value of the lateral acceleration a satisfies a specified condition with regard to a reference value. This will check if the monitoring system is malfunctioning.
- step B the check is carried out during operation of the rail vehicle 2 in an operating area in which the monitoring system 4 does not monitor running stability:
- the test is additionally performed in a step Bl, while the driving speed below the
- Basic stability speed is: v P ⁇ v G .
- the acceleration sensor 6 measures a transverse acceleration of the rail vehicle 2 and generates a signal in the process.
- the signal generated by the acceleration sensor 6 is filtered and averaged in a method step B3 and the individual signal values are each converted into an acceleration value using a clear conversion rule.
- a method step B4 the checking device 5 checks whether a variable dependent on the signal from the acceleration sensor 6 satisfies a predetermined condition with regard to a reference value.
- the variable dependent on the signal is the transverse acceleration a described above.
- the test device 5 determines in a method step B5 whether the acceleration value of the lateral acceleration a meets a specified condition with respect to a reference value fulfill. This checks whether the monitoring system 4 has a malfunction.
- a reaction to the detection of a malfunction in the monitoring system 4 is triggered.
- the monitoring system 4 is temporarily deactivated in a method step CI when a malfunction of the monitoring system 4 is detected. This means that externally induced vibrations do not lead to permanent restrictions. If the malfunction of the monitoring system 4 is detected repeatedly, the monitoring system 4 is permanently deactivated in a method step C2. In this case, a maintenance measure is required. The monitoring system 4 is only activated again after the maintenance measure has been completed.
- a warning can be issued in a method step C3 if a malfunction of the monitoring system 4 is detected.
- the high-pass filter 14 and/or band-pass filter 16 can be adjusted in a method step C4 if a malfunction of the monitoring system 4 is detected, which is caused, for example, by an external influence on the rail vehicle 2.
- the high-pass filter 14 and/or band-pass filter 16 is adapted to frequencies of the signal that the acceleration sensor 6 generates while the malfunction is being detected. The adjustment is made in such a way that characteristic frequencies of the signal are filtered out.
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021201672 | 2021-02-23 | ||
| PCT/EP2022/051524 WO2022179781A1 (de) | 2021-02-23 | 2022-01-25 | Verfahren zur erkennung einer fehlfunktion eines überwachungssystems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4277825A1 true EP4277825A1 (de) | 2023-11-22 |
Family
ID=80683722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22708749.1A Pending EP4277825A1 (de) | 2021-02-23 | 2022-01-25 | Verfahren zur erkennung einer fehlfunktion eines überwachungssystems |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20240230708A9 (de) |
| EP (1) | EP4277825A1 (de) |
| WO (1) | WO2022179781A1 (de) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2166365A1 (de) * | 2008-09-19 | 2010-03-24 | Bombardier Transportation GmbH | Verteiltes Sicherheitsüberwachungssystem mit einer Sicherheitsschleife und Verfahren zum Testen eines solchen Systems |
| US10137915B2 (en) * | 2013-12-24 | 2018-11-27 | Amsted Rail Company, Inc. | System and method for detecting operational anomalies in train consists and railcars |
| DE102015218941A1 (de) | 2015-09-30 | 2017-03-30 | Siemens Aktiengesellschaft | Verfahren zur Erkennung eines Defekts eines Beschleunigungssensors und Messsystem |
-
2022
- 2022-01-25 US US18/547,551 patent/US20240230708A9/en active Pending
- 2022-01-25 EP EP22708749.1A patent/EP4277825A1/de active Pending
- 2022-01-25 WO PCT/EP2022/051524 patent/WO2022179781A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022179781A1 (de) | 2022-09-01 |
| US20240230708A9 (en) | 2024-07-11 |
| US20240133917A1 (en) | 2024-04-25 |
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Owner name: SIEMENS MOBILITY GMBH |