CN111163993A - Method for determining an adjustment force based on sound emission measurements - Google Patents
Method for determining an adjustment force based on sound emission measurements Download PDFInfo
- Publication number
- CN111163993A CN111163993A CN201880062650.5A CN201880062650A CN111163993A CN 111163993 A CN111163993 A CN 111163993A CN 201880062650 A CN201880062650 A CN 201880062650A CN 111163993 A CN111163993 A CN 111163993A
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- China
- Prior art keywords
- switch drive
- sensor
- switch
- adjusting
- force
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- 238000005259 measurement Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008878 coupling Effects 0.000 claims description 23
- 238000010168 coupling process Methods 0.000 claims description 23
- 238000005859 coupling reaction Methods 0.000 claims description 23
- 238000012423 maintenance Methods 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000010897 surface acoustic wave method Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 241000283707 Capra Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/20—Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
- B61L27/50—Trackside diagnosis or maintenance, e.g. software upgrades
- B61L27/53—Trackside diagnosis or maintenance, e.g. software upgrades for trackside elements or systems, e.g. trackside supervision of trackside control system conditions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/02—Mechanical devices for operating points or scotch-blocks, e.g. local manual control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/04—Fluid-pressure devices for operating points or scotch-blocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/06—Electric devices for operating points or scotch-blocks, e.g. using electromotive driving means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Railway Tracks (AREA)
Abstract
A method for evaluating a switch drive of a track switch is disclosed, wherein at least one sensor for measuring sound waves is arranged on or in an outer housing of the switch drive, a measurement signal of the at least one sensor is amplified and recorded during an adjusting operation of the switch drive, and an adjusting force of an adjusting force coupler of the switch drive is determined on the basis of the recorded measurement signal of the at least one sensor. Furthermore, a switch drive system is disclosed.
Description
Technical Field
The invention relates to a method for evaluating a switch drive of a track switch. The invention further relates to a switch drive system having a measuring system for carrying out the method and a switch drive for adjusting switch points of a track switch.
Background
To move switches, manually or electrically operated switch drives are used as the most important elements of the railway infrastructure. The required adjustment force acting on the adjustment lever is achieved by means of an adjustable adjustment force coupling. During the service life of the switch drive of up to 25 years, the adjustment forces set from factory delivery may change. During the service life of the switch drive, the adjusting force may decrease. Since the actuating force is of great importance for the safety in terms of the operation of the switches and switch drives, the actuating force must be checked in a monitored manner or by measurement.
Up to now, the adjusting force of the switch drive has to be checked regularly. For this reason, maintenance of the switch drives must be organized and performed. And measuring the adjusting force by using measuring equipment and the force measuring anchor rod on site. Based on the measurement results, the adjustment force coupling is readjusted or the entire switch drive is replaced.
Disclosure of Invention
The object of the invention is to provide a method for determining the adjustment force of a switch drive, in which direct intervention in the operation of the switch drive is avoided.
The above technical problem is solved by the subject matter of independent claims 1 and 10. Advantageous embodiments of the invention are the subject matter of the respective dependent claims.
According to an aspect of the invention, a method for analyzing switch drives of a track switch is provided. According to the invention, at least one sensor for measuring sound waves is provided. The sensor may be arranged on or in the outer housing of the switch drive. Subsequently, during the adjustment operation of the switch drive, the measurement signal of the at least one sensor is recorded. The measurement signal may be amplified. The adjusting force of the adjusting force coupling of the switch drive is determined on the basis of the recorded measuring signal of the at least one sensor.
As sensors, for example, piezoelectric sensors can be used, which can measure sound waves and vibrations generated when the switch drive is in operation. In particular, a surface acoustic wave sensor may be used as the at least one sensor. Such a sensor can be implemented robustly with respect to external influences at a low price, so that it can be used in the field of rail vehicles and rail networks. Vibrations and sound waves generated by components of the switch drive can propagate through the fixing element and the outer housing and can be measured there.
In particular, vibrations of the switch drive motor, the mechanical adjustment path elements (e.g. adjustment slides, ball screws), the adjustment force couplings and the shaft and the bearing can be measured. The at least one sensor can be calibrated on the basis of the measurement signals of a defined number of adjustment processes (adjustment operations). The calibration can preferably be carried out in dependence on the defined nominal adjustment force of the adjustment force coupling and the components used in the switch drive.
An insufficiently maintained adjusting force coupler is tighter than an optimally working adjusting force coupler. The switch drive motors must therefore be operated at higher rotational speeds in order to apply the required torque for tight adjustment force couplings.
The vibrations generated by the switch drive motor are related to the rotational speed of the switch drive motor according to the known motor operating curve of the switch drive motor. On the basis of the determined measurement signal of the at least one sensor, the load level of the switch drive motor and thus also of the adjustment force coupler can be determined. In particular, deviations from the usual setting operation can be detected as early as possible by the determined measurement signal of the at least one sensor.
By means of the method, the current actuating force of the actuating force coupling of the switch drive can be checked in a contactless manner. Thus, manual checks of the adjustment force coupling, which are also direct interventions on the operation of the switch drive, can be avoided. Furthermore, by means of the method, the reaction deviation in determining the actuating force of the actuating force coupling can be minimized.
According to one embodiment of the method, at least one sensor is arranged in a detachable manner outside the outer casing of the switch drive. By fixing the at least one sensor externally, no change of the outer casing is required, and therefore no change of the existing safety certification of the switch drive is required. Thus, the adjustment force can be measured without changing the design of the existing switch drive. It is therefore also possible to check or adapt switch drives that have already been put into operation according to the method according to the invention.
By technically simple fastening of at least one sensor to the outer housing of the switch drive, any electromechanical switch drive motor and actuating force coupling can be realized. For example, the at least one sensor may be detachably arranged on the outer housing by means of at least one magnet, a strap or a clip wrapped around the outer housing, or by means of a clip connection. Alternatively or additionally, the at least one sensor may be temporarily or permanently affixed to the outer housing.
According to a further embodiment of the method, stored measurement signals of a plurality of adjustment processes of the switch drive are compared with each other to determine the need for maintenance of the adjustment force coupling. By comparing a plurality of measurements performed by at least one sensor at different times, a trend or deviation in the adjustment operation can be detected. Deviations in the vibration or sound characteristics of the adjustment operation may be an indication of technical defects or future technical defects. Thus, the cause of a possible defect can be determined and eliminated as early as possible, thereby avoiding costs for failure of the switch drive or replacement of multiple components.
According to a further embodiment of the method, it is determined that maintenance of the actuating force coupling is required below the determined minimum setpoint value of the actuating force. The adjustment force of the adjustment force coupler can be calculated on the basis of the measurement signal determined by the at least one sensor and a corresponding calibration of the at least one sensor.
When the calculated regulating force exceeds or falls below a defined nominal value, the need for maintenance can be signaled. For example, when it is 1.2 times lower than the nominal value of the regulating force, the need for maintenance can be signaled.
According to a further embodiment of the method, the wear state of the adjusting force coupling is determined using stored measurement signals of a plurality of adjusting operations of the switch drive. Based on a number of adjustment operations of the switch drives monitored or checked, trends regarding the vibration characteristics of the switch drives may be measured. Thereby, event-dependent optimized maintenance can be achieved independently of the components of the switch drive. Thus, maintenance costs may be reduced and the availability of switch drives may be increased.
According to another embodiment of the method, stored measurement signals of a plurality of adjustment processes of the switch drives are used to create a state prediction for adjusting the force coupler. A model of the switch drives and wear parts, for example the adjustment force couplers, can be created on the basis of the measurement signals. Thus, predictive state predictions may be created that enable declarations to be made to the customer or service provider regarding maintenance overhead or effective state. In particular, a continuous monitoring of the actuating force can thereby be achieved.
According to a further embodiment of the method, a future point in time of maintenance is determined on the basis of a state prediction of the created adjusting force coupler. From the temporally offset measurement signals, a trend or change in the actuating force can be detected. Thereby, a point of time may be estimated at which maintenance of the switch drives may be advantageous or necessary. Thus, existing service models may be checked or adjusted by performing fact-based data analysis on the monitored switch actuators.
In particular, the determined information about the monitored switch actuators may be combined with other diagnostic data, e.g. from the program Sidis W compact, and used to optimize an existing diagnostic program. Thus, a more accurate risk, status and availability assessment of the examined switch drives can be made.
According to a further embodiment of the method, the measurement signal of the at least one sound sensor is recorded continuously or discretely in time. This makes it possible to monitor the switch actuators for a long time. On the basis of the data or information determined by long-term monitoring, it is possible to obtain accurate performance data for adjusting the force coupler depending on different environmental influences and operational use strengths. These data can be used to further develop or structurally modify the switch drive.
According to a further embodiment of the method, the measurement signals of the at least one sensor are stored and provided on an external server unit. The determined measurement signals or the adjustment forces of the different adjustment force couplings calculated therefrom can thus be collected and evaluated in a concentrated manner.
In particular, the at least one sensor may be coupled to evaluation electronics, which may transmit the determined measurement signals directly to an external server unit. This enables the measurement signal of the at least one sensor to be evaluated independently of the position.
According to a further aspect of the invention, a switch drive system is provided, which has a measuring system for carrying out the method according to the invention and a switch drive for adjusting at least two switch points of a track switch. The switch drive has a switch drive motor for driving an actuating rod connected to the at least one switch point directly or indirectly via an actuating force coupling. The switch drive furthermore has drive electronics for controlling and adjusting the switch drive motor, wherein at least the switch drive motor and the adjusting force coupling are arranged in an outer housing of the switch drive. According to the invention, at least one sensor for measuring sound waves can be arranged on the outer housing and can be evaluated by measuring electronics, wherein the adjusting force of the adjusting force coupling can be measured during an adjusting operation of the switch drive as a function of the measuring signal of the at least one sensor.
The measuring system can in particular have at least one sensor, which can be arranged on any surface in or on the switch drive. The at least one sensor is connected to the measurement electronics, wherein the measurement electronics can at least pre-amplify and record the measurement signal of the at least one sensor.
The measuring electronics can be connected to the transmitting and receiving device, so that the recorded measuring signals of the at least one sensor can be transmitted to an external server unit. Alternatively, the measurement electronics may store the recorded measurement signals of the at least one sensor on a storage medium, for example a memory card, a hard disk or the cloud.
The measuring system can be implemented as a portable system for targeted checking of defined switch drives or as a retrofit solution permanently integrated into the switch drives. The measuring system can be coupled to the drive electronics of the switch drive motor, so that the measuring signal is recorded in a targeted manner only during the adjusting operation.
Preferably, the at least one sensor may be arranged on the outer housing. The at least one sensor may be implemented in the sensor housing to protect it from the environment, so that the at least one sensor may also be mounted or arranged outside the outer housing of the switch drive. Thereby, it is not necessary to open the outer housing in order to perform the measurement, nor to interrupt its adjustment operation.
Thus, by means of the switch drive system, the measuring system can be positioned and operated without directly intervening in the adjusting operation of the switch drive.
The measurement signal may preferably be the amplitude of vibrations and sound waves that change over time, which vibrations and sound waves may be propagated to the at least one sensor and may be recorded there by fixing and holding the component in the outer housing of the switch drive.
According to one embodiment of the switch drive system, the at least one sensor is a surface wave sensor. The at least one sensor may preferably be a sensor based on the piezoelectric effect. The vibrations and sound waves reaching the at least one sensor may mechanically excite the piezoelectric substrate of the at least one sensor, whereby voltage pulses corresponding to the excitation may be generated and evaluated. In particular, the vibrations and acoustic waves may be surface acoustic waves that may propagate on the surface of the material.
Drawings
The characteristics, features and advantages of the invention described above, as well as the manner of attaining them, will become clearer and more readily appreciated from the following description of a schematic drawing of a preferred embodiment, which is greatly simplified. In this case, the amount of the solvent to be used,
figure 1 shows a perspective view of a switch drive system according to a first embodiment,
fig. 2 shows a schematic flow diagram of a method for analyzing switch drives according to a first embodiment.
In the figures, identical structural elements have identical reference numerals, respectively.
Detailed Description
Fig. 1 shows a perspective view of a switch drive system 1 according to a first embodiment. The switch drive system 1 is formed here by a switch drive 2 and a measuring system 4 arranged on the switch drive 2.
The switch drive 2 has an outer casing 6, which outer casing 6 is open for the purpose of illustration of the components. The switch drive 2 has a switch drive motor 8. The switch drive motor 8 is an electric motor and drives an adjusting slide 10 connected to the adjusting rod.
The switch drive motor 8 drives the adjusting rod 10 indirectly via a transmission, not shown, and via an adjusting force coupling 12 mounted on the ball screw.
By means of the adjusting force coupling 12, a defined adjusting force can be applied to the adjusting slide 10. The adjusting force coupling 12 can prevent damage to the switch drive motor 8 and the gear, in particular, when the adjusting carriage 10 is locked during the displacement process.
When a signal for performing an adjustment operation is input from a control center (control unit in a control station), the drive electronics 14 control the switch drive motor 8.
According to this exemplary embodiment, the adjusting slider (adjusting lever) 10 is connected to the switch tongue 16 and can pivot (move) the switch tongue 16 transversely to the rail direction S of the rail 18.
The measuring system 4 is formed by a sensor 20 and measuring electronics 22. The sensor 20 is a SAW (surface acoustic wave) sensor 20 and is positioned on the outer surface of the outer housing 6 of the switch drive 2 by means of magnets, not shown.
The sensor 20 is coupled with measurement electronics 22, so that the measurement electronics 22 can record and process the measurement signals determined by the sensor 20.
A schematic flow chart of a method 30 for analyzing a switch machine drive 2 according to a first embodiment is shown in fig. 2.
In a first step 31, the sensor 20 is arranged on or in the outer housing 6 of the switch drive 2.
Subsequently, the at least one sensor 20 is connected 32 to the measurement electronics 22.
The measurement electronics 22 receive the measurement signals of the at least one sensor 20 and store 33 after amplification and filtering.
In a further step, an adjustment force for adjusting the force coupler 12 is determined or calculated 34 on the basis of the recorded measurement signals. This may be achieved in particular by a calibration previously performed on the at least one sensor 20 and the measurement electronics 22.
Although the invention has been illustrated and described in detail by means of preferred embodiments, the invention is not limited to the examples disclosed, from which other variants can be derived by the person skilled in the art without departing from the scope of protection of the invention.
Reference numerals
1 switch drive system
2 switch actuator
4 measuring system
6 outer casing
8 goat driving motor
10 adjusting slide block (adjusting lever)
12 adjustment force coupler
14 drive electronic device
16 switch tongue
18 track
20 sensor
22 measurement electronics
30 method
31 arranging at least one sensor
32 connecting at least one sensor with the measuring electronics
33 receiving and storing the measurement signal
34 determining the adjusting force
Direction of S track
Claims (11)
1. A method (30) for evaluating switch drives (2) of a track switch, wherein,
-providing at least one sensor (20) for measuring sound waves,
-recording (33) measurement signals of the at least one sensor (20) during an adjustment process of the switch drive (2),
-determining (34) an adjustment force of an adjustment force coupling (12) of the switch drive (2) based on the recorded measurement signal of the at least one sensor (20).
2. Method according to claim 1, wherein the at least one sensor (20) is arranged (31) in a detachable manner outside an outer casing (6) of the switch drive (2).
3. A method according to claim 1 or 2, wherein the stored measurement signals of a plurality of adjustment operations of the switch drive (2) are compared with each other to determine the need for maintenance of the adjustment force coupler (12).
4. Method according to claim 3, wherein a maintenance requirement of the regulating force coupling (12) is determined below a determined minimum nominal value of the regulating force.
5. Method according to any of claims 1-4, wherein the wear state of the adjusting force coupler (12) is determined using stored measurement signals of a plurality of adjusting operations of the switch drive (2).
6. Method according to any of claims 1 to 5, wherein a stored measurement signal of a plurality of adjustment operations of the switch drive (2) is used to create a state prediction of the adjustment force coupler (12).
7. Method according to claim 6, wherein a future point in time of maintenance is determined on the basis of the created state prediction of the adjusting force coupler (12).
8. The method according to any one of claims 1 to 7, wherein the measurement signal of the at least one sensor (20) is recorded continuously or discretely in time.
9. The method according to any one of claims 1 to 8, wherein the measurement signals of the at least one sensor (20) are stored and provided on an external server unit.
10. Switch drive system (1) with a measuring system (4) for carrying out a method (30) according to one of the preceding claims and with a switch drive (2) for adjusting at least two switch points (16) of a track switch, with a switch drive motor (8) for driving an adjusting rod (10) connected with at least one switch point (16) directly or indirectly via an adjusting force coupler (12) and with drive electronics (14) for controlling and adjusting the switch drive motor (8), wherein at least the switch drive motor (8) and the adjusting force coupler (12) are arranged in an outer housing (6) of the switch drive (2), characterized in that at least one sensor (20) for measuring sound waves can be arranged on the outer housing (6) and can be evaluated by measuring electronics (22), wherein the adjusting force of the adjusting force coupling (12) can be measured during an adjusting operation of the switch drive (2) depending on a measuring signal of the at least one sensor (20).
11. Switch drive system according to claim 10, wherein the at least one sensor (20) is a surface wave sensor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017217414.5 | 2017-09-29 | ||
| DE102017217414.5A DE102017217414A1 (en) | 2017-09-29 | 2017-09-29 | Method for determining a force based on acoustic emission measurements |
| PCT/EP2018/074095 WO2019063263A1 (en) | 2017-09-29 | 2018-09-07 | Method for determining an actuating force on the basis of sound emission measurements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111163993A true CN111163993A (en) | 2020-05-15 |
| CN111163993B CN111163993B (en) | 2022-04-01 |
Family
ID=63685926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880062650.5A Active CN111163993B (en) | 2017-09-29 | 2018-09-07 | Method for determining an adjustment force based on sound emission measurements |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP3661829B1 (en) |
| CN (1) | CN111163993B (en) |
| AU (1) | AU2018340218B2 (en) |
| DE (1) | DE102017217414A1 (en) |
| ES (1) | ES2903446T3 (en) |
| PL (1) | PL3661829T3 (en) |
| WO (1) | WO2019063263A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202000002818A1 (en) * | 2020-02-12 | 2021-08-12 | Silsud S R L | APPARATUS AND METHOD FOR HANDLING THE NEEDLES OF A RAILWAY SWITCH |
| EP3885234A1 (en) * | 2020-03-27 | 2021-09-29 | Siemens Mobility GmbH | Cover for mounting on a point machine and method for providing a monitoring of a point machine |
| WO2023109995A1 (en) * | 2021-12-14 | 2023-06-22 | Bornemann Gewindetechnik GmbH & Co. KG | Track system comprising a spindle assembly having an integrated sensor |
| EP4342764A1 (en) * | 2022-09-20 | 2024-03-27 | voestalpine Signaling Austria GmbH | Method for monitoring a rail switch and switch drive |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19830685A1 (en) * | 1998-07-04 | 2000-01-05 | Dieter H Gaertner | Monitoring unit for operating noise of railway vehicles or for monitoring railway vehicle routes |
| DE19944896A1 (en) * | 1999-09-09 | 2001-03-15 | Siemens Ag | Train location system for rail network |
| CN1799912A (en) * | 2005-08-31 | 2006-07-12 | 武汉理工大学 | Method and apparatus for online test control of operation status of hydraulic switch machine turnout |
| DE202015100566U1 (en) * | 2015-02-05 | 2016-05-09 | Hanning & Kahl Gmbh & Co. Kg | Device for measuring the contact force on a switch |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29917827U1 (en) * | 1999-10-09 | 2001-03-01 | Hanning & Kahl GmbH & Co., 33813 Oerlinghausen | Point setting device |
| DE102008055651A1 (en) * | 2008-10-29 | 2010-05-06 | Siemens Aktiengesellschaft | Point Diagnostic System |
-
2017
- 2017-09-29 DE DE102017217414.5A patent/DE102017217414A1/en not_active Withdrawn
-
2018
- 2018-09-07 WO PCT/EP2018/074095 patent/WO2019063263A1/en unknown
- 2018-09-07 EP EP18778815.3A patent/EP3661829B1/en active Active
- 2018-09-07 AU AU2018340218A patent/AU2018340218B2/en active Active
- 2018-09-07 ES ES18778815T patent/ES2903446T3/en active Active
- 2018-09-07 PL PL18778815T patent/PL3661829T3/en unknown
- 2018-09-07 CN CN201880062650.5A patent/CN111163993B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19830685A1 (en) * | 1998-07-04 | 2000-01-05 | Dieter H Gaertner | Monitoring unit for operating noise of railway vehicles or for monitoring railway vehicle routes |
| DE19944896A1 (en) * | 1999-09-09 | 2001-03-15 | Siemens Ag | Train location system for rail network |
| CN1799912A (en) * | 2005-08-31 | 2006-07-12 | 武汉理工大学 | Method and apparatus for online test control of operation status of hydraulic switch machine turnout |
| DE202015100566U1 (en) * | 2015-02-05 | 2016-05-09 | Hanning & Kahl Gmbh & Co. Kg | Device for measuring the contact force on a switch |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2018340218B2 (en) | 2020-12-17 |
| EP3661829A1 (en) | 2020-06-10 |
| EP3661829B1 (en) | 2021-10-27 |
| ES2903446T3 (en) | 2022-04-01 |
| CN111163993B (en) | 2022-04-01 |
| WO2019063263A1 (en) | 2019-04-04 |
| PL3661829T3 (en) | 2022-02-14 |
| DE102017217414A1 (en) | 2019-04-04 |
| AU2018340218A1 (en) | 2020-03-19 |
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