EP4490012A1 - Sensor und eisenbahngleisanlage mit sensor - Google Patents
Sensor und eisenbahngleisanlage mit sensorInfo
- Publication number
- EP4490012A1 EP4490012A1 EP23733871.0A EP23733871A EP4490012A1 EP 4490012 A1 EP4490012 A1 EP 4490012A1 EP 23733871 A EP23733871 A EP 23733871A EP 4490012 A1 EP4490012 A1 EP 4490012A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frequency
- sensor
- voltage
- current
- working frequency
- 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
- 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
Definitions
- the invention relates to sensors and railway track systems with sensors.
- Sensors for detecting the wheels of rail vehicles are well known in railway technology, for example in order to be able to detect the entry of a rail vehicle into a predetermined section of a railway line or the departure from this section and to report the respective section as free or occupied.
- the invention is based on the object of specifying a sensor that can reliably detect an approach, in particular of magnetizable objects, for example iron-containing objects such as wheels of rail vehicles, and is nevertheless simple in construction.
- This object is achieved according to the invention by a sensor with the features according to claim 1.
- Advantageous embodiments of the sensor according to the invention are specified in the subclaims.
- a monitoring device that generates a detection signal when the output voltage of the direct source falls below the maximum voltage by a predetermined level, and/or generates a warning signal when the output current of the direct source falls below the maximum current by a predetermined level.
- a significant advantage of the sensor according to the invention is that the detection signal is formed on the basis of measured values that are on the DC voltage side of the converter or on the output side of the direct source.
- the measured value acquisition is therefore decoupled from the AC voltage side and the series resonance circuit, so that the measurement has no or at least no significant influence on the series resonance circuit or its resonance frequency.
- the generation of the detection signal and/or the The warning signal always occurs at the same frequency and depends solely on direct current or DC voltage values.
- the converter can form the alternating voltage with this previously known constant frequency.
- the optimal frequency will not always be known exactly, at least it can change over time.
- the sensor has a frequency generator that controls the converter and thus specifies the frequency of the alternating voltage.
- the working frequency of the frequency generator preferably corresponds to the frequency of the alternating voltage that the converter is intended to generate.
- the frequency generator preferably generates a sine signal or a square wave signal, the frequency of which corresponds to the frequency of the alternating voltage to be generated for the series resonant circuit.
- the monitoring device is preferably connected to the frequency generator and sets its working frequency and thus the frequency of the alternating voltage.
- the monitoring device can advantageously determine the optimal working frequency itself or at least readjust it if this seems sensible.
- the monitoring device is designed to carry out a working frequency check regularly or irregularly, independently or in response to an external control command.
- the monitoring device carries out the working frequency test in detection-free sensor operation.
- the monitoring device leaves the working frequency of the frequency generator and thus the frequency of the alternating voltage to be generated for the series resonant circuit unchanged when the direct source feeds the maximum current into the converter at maximum voltage.
- the frequency is increased when the output voltage of the direct source is less than the maximum voltage and is reduced when the output current of the direct source is less than the maximum current.
- the monitoring device initiates a frequency increase and a frequency reduction as part of the working frequency test - based on the previously set working frequency - and the effects of the frequency increase and the frequency reduction on the output voltage of the direct source and the Output current of the direct source observed.
- the monitoring device preferably leaves the working frequency unchanged if - based on the current working frequency - the output current of the direct source decreases when the frequency is increased and the output voltage of the direct source decreases when the frequency is reduced. If the behavior described last, i.e. that the output current decreases in the event of a frequency increase and the output voltage decreases in the event of a frequency reduction, cannot be determined, then it is advantageous if the monitoring device changes the working frequency as part of the working frequency test, and for as long as this until it determines that - based on the respective changed working frequency - the output current of the direct source decreases with a further increase in frequency and that the output voltage of the direct source decreases with a further reduction in frequency. As soon as it determines this, it preferably continues to use the changed working frequency as the new working frequency for further sensor operation until the next working frequency test.
- the sensor is preferably a wheel flange detector which is designed for wheel detection of rail vehicle wheels traveling on a railway track and passing the sensor and which generates a wheel detection signal as a detection signal.
- the invention also relates to a railway track system which is equipped with a sensor as described above;
- the sensor is arranged in the area of a railway track or attached to it and is used to detect rail vehicle wheels traveling on the railway track and passing the sensor.
- the monitoring device of the sensor preferably generates a wheel detection signal when the output voltage of the direct source falls below the maximum voltage by a predetermined level.
- the monitoring device of the sensor preferably generates a warning signal when the output current of the direct source falls below the maximum current by a predetermined level.
- Figure 3 shows finding and setting the optimal working frequency of the sensor according to Figures 1 and 2 using a frequency diagram.
- the same reference symbols are used for identical or comparable components.
- the voltage limiter 12 If the voltage Us present on the input side of the voltage limiter 12 reaches the maximum voltage Umax, the voltage limiter 12 only outputs this maximum voltage Umax as the output voltage U of the direct source 10, so that in such a case the output current I of the voltage limiter 12 can fall below the maximum current Imax of the current source 11 .
- the frequency f of the alternating voltage Uw applied by the converter 20 to the series resonance circuit 30 is preferably set by the monitoring device 50 in such a way that the direct source 10 - in detection-free sensor operation - feeds the maximum current Imax at the maximum voltage Umax into the converter 20; This will be explained in more detail below.
- the monitoring device 50 accordingly generates the wheel detection signal RDS when the output voltage U of the direct source 10 falls below the predetermined maximum voltage Umax by a predetermined amount.
- the sensor 1 Since the sensor 1 is arranged in the area of the railway track 110 or attached to it, it is suitable for wheel detection of the rail vehicle wheel 120.
- the coil 31 is preferably arranged in the sensor housing la of the sensor 1 in such a way that the magnetic field of the coil 31 runs predominantly vertically, so that the metal mass of the rail vehicle wheel 120 lying above it can be easily detected.
- the sensor 1 according to Figures 1 and 2 is preferably operated as follows: Installation :
- the monitoring device 50 changes the working frequency until it determines that - based on the respective working frequency applied - the output current I of the direct source 10 decreases with a further frequency increase and the output voltage U der with a frequency reduction DC source 10 sinks.
- the monitoring device 50 is preferably used regularly or irregularly, independently or on an external control Carry out a working frequency test in response to the SB command.
- the working frequency test is preferably carried out in detection-free sensor mode in order to avoid an error or a delay in the working frequency test due to the influence of disruptive iron material from passing rail vehicle wheels 120.
- the monitoring device 50 will leave the current working frequency of the frequency generator 40 unchanged when the direct source 10 feeds the maximum current Imax at the maximum voltage Umax into the converter 20, i.e. the optimal operating point has already been reached.
- the exemplary embodiments for the sensor 1 explained above can - but do not have to - have one or more of the features, advantages or properties listed below in bullet points: -
- the series resonance circuit 30 is preferably not operated as a self-oscillating oscillator, but is preferably controlled at its resonance frequency via a converter 20.
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022206169.1A DE102022206169A1 (de) | 2022-06-21 | 2022-06-21 | Sensor und Eisenbahngleisanlage mit Sensor |
| PCT/EP2023/065099 WO2023247171A1 (de) | 2022-06-21 | 2023-06-06 | Sensor und eisenbahngleisanlage mit sensor |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4490012A1 true EP4490012A1 (de) | 2025-01-15 |
| EP4490012B1 EP4490012B1 (de) | 2026-02-18 |
| EP4490012C0 EP4490012C0 (de) | 2026-02-18 |
Family
ID=87001886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23733871.0A Active EP4490012B1 (de) | 2022-06-21 | 2023-06-06 | Sensor und eisenbahngleisanlage mit sensor |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4490012B1 (de) |
| CN (1) | CN119403719A (de) |
| AU (1) | AU2023287321B2 (de) |
| DE (1) | DE102022206169A1 (de) |
| WO (1) | WO2023247171A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3643970A1 (de) * | 1986-12-22 | 1988-06-30 | Siemens Ag | Sensoreinrichtung fuer eisenbahnanlagen |
| RU2092354C1 (ru) * | 1993-04-23 | 1997-10-10 | Геннадий Галиуллович Валеев | Устройство для счета осей железнодорожных подвижных составов (варианты) |
| AT406139B (de) | 1998-04-08 | 2000-02-25 | Frauscher Josef | Radsensor |
| DE19959233B4 (de) | 1999-12-08 | 2007-12-13 | Tiefenbach Gmbh | Induktiver Sensor zum Erfassen von Metallteilen |
| DE10221577B3 (de) | 2002-05-08 | 2004-03-18 | Siemens Ag | Magnetischer Radsensor |
| AT413373B (de) | 2003-03-27 | 2006-02-15 | Frauscher Josef | Schaltungsanordnung zum abgleichen von induktiven sensoren |
| EP1538058A1 (de) * | 2003-12-01 | 2005-06-08 | Alcatel | Verfahren und System zum Ausgleich von Spannungsschwankungen einer Sendespule eines Schienenkontakts |
| DE102012212939A1 (de) | 2012-07-24 | 2014-01-30 | Siemens Aktiengesellschaft | Radsensor |
-
2022
- 2022-06-21 DE DE102022206169.1A patent/DE102022206169A1/de not_active Withdrawn
-
2023
- 2023-06-06 WO PCT/EP2023/065099 patent/WO2023247171A1/de not_active Ceased
- 2023-06-06 EP EP23733871.0A patent/EP4490012B1/de active Active
- 2023-06-06 CN CN202380048387.5A patent/CN119403719A/zh active Pending
- 2023-06-06 AU AU2023287321A patent/AU2023287321B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023247171A1 (de) | 2023-12-28 |
| AU2023287321A1 (en) | 2024-12-12 |
| AU2023287321B2 (en) | 2026-02-26 |
| DE102022206169A1 (de) | 2023-12-21 |
| CN119403719A (zh) | 2025-02-07 |
| EP4490012B1 (de) | 2026-02-18 |
| EP4490012C0 (de) | 2026-02-18 |
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