EP4547542A1 - Verfahren und system zum überwachen eines gleisabschnitts - Google Patents
Verfahren und system zum überwachen eines gleisabschnittsInfo
- Publication number
- EP4547542A1 EP4547542A1 EP23777158.9A EP23777158A EP4547542A1 EP 4547542 A1 EP4547542 A1 EP 4547542A1 EP 23777158 A EP23777158 A EP 23777158A EP 4547542 A1 EP4547542 A1 EP 4547542A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rail
- measurement signals
- rail vehicle
- sensor
- track section
- 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
-
- 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
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/163—Detection devices
- B61L1/165—Electrical
-
- 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
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/162—Devices for counting axles; Devices for counting vehicles characterised by the error correction
Definitions
- the present invention relates to a method and a system for monitoring a section of track for the presence or absence of at least part of a rail vehicle moving on the track.
- axle counters by detecting the vehicle wheels using counting points (sensors).
- a method for monitoring a track section for the presence or absence of at least part of a rail vehicle moving on the track comprising: obtaining first measurement signals from a first sensor located at the beginning of the track section; Obtaining second measurement signals from a second sensor located at the end of the track section (in the case of switch or crossing sections, there may be additional sensors that limit the track section); Evaluating the first measurement signals and the second measurement signals in order to register or count metal bodies moving in and to register or count metal bodies moving out, with both axles or wheels and any brakes present being detected as metal bodies; Infer the presence or absence of the part of the rail vehicle on the track section based on registration or counting.
- the method can be implemented in software and hardware.
- the method can, for example, be carried out or controlled by a system for monitoring a track section according to an embodiment of the present invention.
- the monitored track section can typically have a length of between 30 m (possibly even shorter, but the track section length should always be greater than the maximum axle distance of a vehicle so that a vehicle cannot stand over the section) and virtually infinite.
- the rail vehicle can, for example, be used for transport be used by passengers and/or to transport goods.
- Both the first sensor (sensor counting into the track section) and the second sensor (sensor counting out of the track section) can be designed to detect metal masses or metal bodies that are above or below the top edge of the rail or in the detection area of the sensor condition .
- the sensors can include conventional sensors, in particular axle counting sensors. The sensors must also be able to detect the direction of travel.
- a single sensor may be sufficient to detect both entering and leaving vehicles.
- the first sensor is identical to the second sensor.
- more than two sensors can be present at different points on the track section, whose measurements can be used.
- the rail vehicle can move in the direction from the beginning of the track section to the end of the track section.
- the rail vehicle does not necessarily have to pass through the entire track section, but can, for example, come to a standstill before the track section has been completely traveled through or, if necessary, change direction within the track section.
- the rail vehicle can pass through the track section completely, so that both the first sensor and a second sensor (and/or further sensors, e.g. at a switch or crossing point) are passed by the rail vehicle or part of the rail vehicle at the same time.
- the rail vehicle can, for example, have a length between 10 m and 500 m.
- Embodiments of the present invention can also enable the To detect the presence of a complete rail vehicle on the track section or to detect its absence.
- the measurement signals can be obtained via cable connections, optical connections or wirelessly from the first sensor or the second sensor.
- the measurement signals can include analog measurement signals, for example values of induced voltages which are generated in the sensors due to metal bodies passing through.
- the evaluation of the first measurement signals and the second measurement signals can, for example, comprise a comparison with one or more threshold values.
- Incoming metal bodies can be understood as metallic, particularly ferromagnetic masses or bodies which are parts of the rail vehicle and which move past the first sensor into the track section.
- Outgoing metal bodies can be understood as all metallic, particularly ferromagnetic parts of the rail vehicle which move past the second sensor and thus move outside the track section.
- any brakes that may be present are also detected, which can be provided in particular between two wheels or between two axles of the rail vehicle.
- the brakes can be used for braking in certain driving situations or under certain external environmental conditions.
- Embodiments of the present invention do not require knowledge of the number of axles or wheels and/or the number of brakes that may be present on the rail vehicle.
- differently configured rail vehicles can be supported by embodiments of the present invention in that their absence or presence can be reliably determined.
- the method is designed such that the metal bodies comprise elements of the rail vehicle which are arranged vertically close to the rail, in particular wheels and/or wheel axles and/or brakes of the rail vehicle.
- the method is designed such that the evaluation of the first measurement signals and the second measurement signals comprises: determining a first number of first measurement signals which are above an upper threshold or which are below a lower threshold; determining a second number of second measurement signals which are above the upper threshold or which are below the lower threshold, wherein the upper threshold is greater than the lower threshold.
- the measurement signals can be given, for example, as a measurement signal level, in particular relative voltage (for example related to a measurement value in the absence of a metal body or rail vehicle) as a function of time.
- the upper threshold and/or the lower threshold can be determined by determining measurement values from known metal bodies or from vehicles of known configuration) or training data, whereby, for example, test measurements can be carried out with different rail vehicles passing the sensors.
- the configuration of the rail vehicles with regard to the number of wheels and/or any brakes present can be known.
- the method can be implemented by defining only an upper threshold and a lower threshold and determining whether the respective measurement signals are above or below of the respective sleeper. This provides a very simple method for reliable monitoring of the track section.
- a conventionally provided delay in the measurement signals below the lower threshold is suppressed.
- a lower threshold can have been used to detect a fault during assembly of the respective sensor, in particular to detect whether fixing bolts or screws have come loose so that the position of the sensor relative to the rail has changed unfavorably, e.g. the sensor has fallen off the rail.
- a measurement signal below the lower threshold was conventionally suppressed or delayed.
- This conventionally provided delay is suppressed according to embodiments of the present invention, since the event that a measurement signal is below the lower threshold is also used to detect metal bodies, in particular to detect a magnetic rail brake, in a reliable manner.
- the method is designed such that the conclusion as to the presence or absence of the rail vehicle comprises: comparing the first number with the second number; concluding the presence or absence of the part of the rail vehicle on the track section from the comparison result.
- the first number When the first number is compared with the second number, it can be determined, for example, whether the number of metal bodies entering the track section is the same or different from the number of metal bodies leaving the track section. This allows reliable monitoring to be carried out.
- the method is designed such that the upper threshold is selected such that a brake from a non-activated brake, in particular a magnetic rail brake, of the rail vehicle or from a wheel axle or The measurement signal caused by the wheel is above.
- both a wheel or a wheel axle and a non-activated brake can be reliably detected.
- the method is designed such that the lower threshold is selected such that a measurement signal caused by an activated brake, in particular a magnetic rail brake, of the rail vehicle is below and a measurement signal caused by a wheel or a wheel axle is above.
- An activated brake can therefore also be detected by determining whether a measurement signal is below the lower threshold. This makes it possible to reliably detect or register both an activated brake and a non-activated brake by evaluating the respective measurement signals. This can improve the reliability of the process.
- the method is designed such that the first measurement signals were permanently recorded while the part of the rail vehicle passes/sweeps over the first sensor; wherein the second measurement signals were also recorded permanently while the part of the rail vehicle passes/crosses the first sensor.
- the measurement signals can be monitored permanently, but can also be event-controlled. There is a permanent assessment or if there is no change in the measured values recorded by the sensors within a certain period of time. The occupancy status of the track section is then derived from this.
- the first sensor and/or the second sensor is configured as a metal sensor, in particular as a counting point of an axle counter system. This allows conventional sensors to be supported, which can simplify the implementation of the invention.
- the first sensor and/or the second sensor comprises: an electromagnetic generator coil mounted on one side of a rail of the track for generating an alternating magnetic field; an electromagnetic detection coil, mounted on the other side of the rail of the track, for detecting a changing magnetic field by inducing a voltage, which in particular represents the measurement signals.
- the generator coil can, for example, generate a (higher frequency) changing magnetic field with a frequency of a few kilohertz (e.g. between 30 kHz and 1000 kHz).
- the changing magnetic field generated by the generator coil can also extend into the area of the detection coil.
- the rail vehicle is a long-distance rail vehicle or a local rail vehicle, in particular a subway, a tram or a commuter train.
- Fig. 1 schematically illustrates a system for monitoring a track section according to an embodiment of the present invention
- Fig. 2 illustrates in a schematic side view a part of a rail vehicle whose presence on a track section is monitored according to an embodiment of the present invention
- Fig. 5 shows experimental results obtained according to embodiments of the present invention.
- the system 1 of FIG. 1 for monitoring a track section 2 for the presence or absence of at least part of a rail vehicle 4 moving on the rails 3a, 3b of the track 40 has an input port 5a, 5b in order to receive first measurement signals 6a from a first located at the beginning 7 of the track section 2 To obtain sensor 8a, and to obtain second measurement signals 6b from a second sensor 8b located at the end 9 of the track section 2.
- the system 1 further comprises an evaluation block which is configured to evaluate the first measurement signals 6a and the second measurement signals 6b in order to register or count incoming metal bodies 10a, 10b, 10c, 1od and 11a, 11b of the rail vehicle 4, whereby As a metal body, both axles or wheels 10a, 10b, 10c, l Od as well as any existing brakes 11a, 11b are detected.
- the evaluation block of the system 1 is further configured to conclude the presence or absence of the part of the rail vehicle 4 on the track section 2 based on the registration or counting.
- the system 1 is designed to carry out or control a method for monitoring the track section 2 .
- the rail vehicle 4 moves on the two rails 3a, 3b of a track 40 in the direction indicated by the arrow 12.
- the rail vehicle 4 comprises at least one railcar, which has two pairs of wheel axles 10a, 10b, 10c, 10d, wherein Between each two wheel axles 10a, 10b or 10c, lO a magnetic rail brake 11a, 11b is mounted.
- the sensors 8a, 8b each include a generator coil 13, which is attached to one side of a rail 3b of the track and is designed to generate a changing magnetic field.
- the sensors 8a, 8b further comprise an electromagnetic detection coil 14, which is designed to detect a changing magnetic field by inducing a voltage.
- the measurement signals 6a, 6b can in particular represent a relative (or absolute) induced voltage, which is given as a proportion of an induced voltage that is generated when no metal body passes the respective sensor 8a, 8b.
- the sensors 8a, 8b are therefore configured as metal sensors, which can also conventionally be referred to as counting points.
- the system 1 may further comprise the first sensor 8a and the second sensor 8b.
- the rail vehicle 4 is illustrated at a time after the wheel axles 10c, 1od and the magnetic rail brake 11b have already passed the first sensor 8a. In the further course the rail vehicle passes 4 or the wheels pass. Wheel axles 10a, 10b and the magnetic rail brake 11a also the first sensor 8a. During a later, second period of time, the rail vehicle 4 and in particular the respective wheel axles and the magnetic rail brakes can pass the second sensor 8b.
- Fig. 2 illustrates in a schematic side view a part of the rail vehicle 4, which moves on the rail 3a, 3b.
- the rail vehicle 4 includes a wheel 10a with a wheel axle, a wheel 10b, and a magnetic rail brake 11a, which is arranged between the wheels or wheel axles 10a and 10b.
- the wheels 10a, 10b are mounted on a bogie 12a together with the magnetic rail brake 11a.
- the distance d of a rail friction contact surface 41 of the magnetic rail brake 11a from the surface of the rail 3b, which is designated d, can be, for example, 4 to 9 mm.
- Fig. 3 illustrates in two coordinate systems with a respective abscissa 15, which shows the time, and in a respective ordinate 16, which shows the relative induced voltage in the detection coil 14, which represents the measurement signal of a sensor, or the digitized wheel pulse on an ordinate 17 indicates the analog measurement signals 18, 19, which were recorded in a conventional method and which were each converted into pulses or pulse profiles 20, 21. It was only determined whether the respective measurement signal 18, 19 is above a conventional upper switching threshold 22 or not. If the measurement signal 18, 19 is above the conventional upper switching threshold, which is, for example, 1.58, the signal is evaluated as a counting pulse 20, 21 and is therefore counted as a wheel or as a wheel axle of the rail vehicle.
- a lower conventional switching threshold 22a (e.g. at 0.85) is used for drop detection.
- a relatively small signal in the area of the brake 27 is not considered a wheel pulse in the measuring area 18, since the measuring signal of the relatively small brake (meaning the relative increase in the voltage induced in the detector coil 14 resulting from the metal mass of the brakes) in the area 27 is below the conventional upper threshold 22.
- a relatively large However, braking in the region 28 generates a measurement signal 19 which is above the conventional upper threshold 22 and thus leads to the evaluation as a counting pulse. In this conventional case, a relatively large brake is thus incorrectly evaluated as the presence of a wheel, which is indicated by a flash.
- Embodiments of the present invention can avoid such miscounts by braking which causes an increase in the induced voltage in the region of the threshold 22).
- Fig. 4 examples of measurement signals and derived pulse counts are illustrated in Fig. 4.
- the abscissas 15 indicate time
- the ordinate 16 indicates the relative induction voltage
- the ordinate 17 indicates a count pulse.
- An upper threshold 30 and a lower threshold 31 are defined.
- the measurement signals 32 were recorded by a rail vehicle which has at least two wheel axles 10a, 10b and a magnetic rail brake 11a.
- the magnetic rail brake was deactivated, that is, passive.
- the measurement signals 32 generated due to the presence of the wheels or wheel axles 10a, 10b and due to the presence of the magnetic rail are all above the upper threshold 30 and are therefore evaluated as pulses in the counting pulse profile 33.
- the measurement signal curve 34 in Fig. 4 illustrates the measurement signals of the same section of the rail vehicle when the magnetic rail brake 10a is activated, that is, active.
- the measurement signals 34 caused by the presence of the wheel axles or wheels 10a, 10b are again above the upper threshold 30.
- the measurement signal 34 in the area of the active magnetic rail brake is not above the upper threshold 30, but below a lower threshold 31.
- the upper threshold 30 can, for example, lie in a range from 1.2 to 1.35 of a relative induction voltage (or relative wheel cant).
- the lower threshold 31 can, for example, be in a range from 0.8 to 0.9 of a relative induction voltage (or relative wheel cant).
- the evaluation leads to a counting pulse profile 35, which counts both the wheels or wheel axles 10a, 10b as counting pulses and the active brake 11a.
- Magnetic rail brakes are available in various designs and, depending on their design, some of them have a strong influence on the wheel sensor. If the vehicles in question also have small wheels, reliable operation with conventional axle counters is often no longer possible.
- Embodiments of the present invention may include the following details, but do not constitute necessary features of the present invention:
- the brakes are not energized and move a few millimeters above the top edge of the rail. Due to the large metal mass, the brakes influence the counting points to a greater or lesser extent - depending on the design of the brake and its distance from the sensor.
- the upper threshold 30 defined according to an embodiment of the present invention may be smaller than a conventionally used upper switching threshold.
- an embodiment of the present invention proposes to also advantageously use the lower switching threshold of the counting points.
- the lower switching threshold of the counting points is used to detect the sensor failure. If, for example, the fastening bolts on the If the wheel sensor has come loose and the sensor has moved away from the rail, this must be disclosed for safety reasons (drop detection). The undershoot of the lower threshold is usually delayed in the counting point and is not immediately passed on.
- the conventionally applied deceleration is switched off.
- activated brakes generate the same signals when the lower threshold is undershot as passive brakes when the upper threshold is exceeded.
- a method is proposed with which both passive (deactivated) and active (activated) brakes, in particular magnetic rail brakes, can be reliably detected and counted like wheels.
- Fig. 5 shows, in coordinate systems with abscissas 15, which indicate the time, and with ordinates 16, which indicate the absolute induction voltage or an ordinate 17, which indicates the counting pulse, measurement signals 36 of a rail vehicle, which has eight axles or wheels and between or between pairs Each of the wheels has magnetic rail brakes, which are shown in the first half of the figure. 5 are activated and in the second half of the figure. 5 are deactivated (passive).
- the upper threshold 30 and the lower threshold 31 are also shown.
- the upper threshold 30 is 1.28 and the lower threshold is 0.85, but these values can be adjusted depending on the application or situation.
- the counting pulse profile 37 shows that both the wheels or wheel axles and the magnetic track brakes are reliably detected in the activated and in the non-activated state.
- the rail vehicle comprises two carriages, each with two bogies, with the magnetic rail brakes being active in the first carriage and passive in the second carriage. Using the proposed method and system, a track section can be monitored in a reliable manner.
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022210357.2A DE102022210357A1 (de) | 2022-09-29 | 2022-09-29 | Verfahren und System zum Überwachen eines Gleisabschnitts |
| PCT/EP2023/075490 WO2024068313A1 (de) | 2022-09-29 | 2023-09-15 | Verfahren und system zum überwachen eines gleisabschnitts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4547542A1 true EP4547542A1 (de) | 2025-05-07 |
Family
ID=88204452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23777158.9A Pending EP4547542A1 (de) | 2022-09-29 | 2023-09-15 | Verfahren und system zum überwachen eines gleisabschnitts |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4547542A1 (de) |
| CN (1) | CN119923341A (de) |
| AU (1) | AU2023350057A1 (de) |
| DE (1) | DE102022210357A1 (de) |
| WO (1) | WO2024068313A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB938228A (en) | 1959-01-20 | 1963-10-02 | Stamicarbon | Automatic vehicle detection apparatus for use on railways |
| ES2069947T3 (es) * | 1991-09-02 | 1995-05-16 | Stein Gmbh | Sensor de rueda para detectar ruedas de vehiculos que circulan sobre carriles. |
| DE9420736U1 (de) | 1994-12-13 | 1995-02-09 | Siemens AG, 80333 München | Einrichtung zum Vermeiden von Fehlzählungen bei der Achszählung im Eisenbahnwesen |
| DE19709840C2 (de) * | 1997-02-28 | 2001-10-04 | Siemens Ag | Einrichtung für die Achszählung zum Unterscheiden von Radbeeinflussungen und Nicht-Radbeeinflussungen |
| DE102005048852A1 (de) | 2004-10-12 | 2006-04-20 | Frauscher Gmbh | Verfahren und Vorrichtung zur fehlertoleranten richtungsorientierten Achszählung von Schienenfahrzeugrädern |
| DE102012217591A1 (de) | 2012-09-27 | 2014-03-27 | Siemens Aktiengesellschaft | Verfahren und Anordnung zum Überwachen eines durch zwei Achszähl-Sensoreinheiten begrenzten Streckenabschnitts |
| DE102013224346A1 (de) | 2013-11-28 | 2015-05-28 | Siemens Aktiengesellschaft | Verfahren und Vorrichtung zur Erhöhung der Verfügbarkeit einer Gleisfreimeldeanlage |
| DE202019005540U1 (de) * | 2019-06-17 | 2021-02-01 | Shenzhen Keanda Electronic Technology Corp., Ltd. | Achszählsystem |
| DE102019215844A1 (de) | 2019-07-23 | 2021-01-28 | Siemens Mobility GmbH | Sensoreinrichtung für eine Anordnung zur Detektion und Analyse eines entlang einer Spur, insbesondere entlang eines Gleises, bewegten Rades eines Fahrzeugs |
-
2022
- 2022-09-29 DE DE102022210357.2A patent/DE102022210357A1/de not_active Withdrawn
-
2023
- 2023-09-15 WO PCT/EP2023/075490 patent/WO2024068313A1/de not_active Ceased
- 2023-09-15 EP EP23777158.9A patent/EP4547542A1/de active Pending
- 2023-09-15 AU AU2023350057A patent/AU2023350057A1/en active Pending
- 2023-09-15 CN CN202380067976.8A patent/CN119923341A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| AU2023350057A1 (en) | 2025-03-20 |
| CN119923341A (zh) | 2025-05-02 |
| WO2024068313A1 (de) | 2024-04-04 |
| DE102022210357A1 (de) | 2024-04-04 |
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