EP2240357B1 - Method for increasing the interference resistance of a wheel sensor and wheel sensor for carrying out the method - Google Patents
Method for increasing the interference resistance of a wheel sensor and wheel sensor for carrying out the method Download PDFInfo
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- EP2240357B1 EP2240357B1 EP09707219A EP09707219A EP2240357B1 EP 2240357 B1 EP2240357 B1 EP 2240357B1 EP 09707219 A EP09707219 A EP 09707219A EP 09707219 A EP09707219 A EP 09707219A EP 2240357 B1 EP2240357 B1 EP 2240357B1
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- wheel sensor
- received signal
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000001965 increasing effect Effects 0.000 title claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000011156 evaluation Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 230000008859 change Effects 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims abstract 5
- 238000012545 processing Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000010363 phase shift Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 230000011664 signaling Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 230000036039 immunity Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 3
- 230000001351 cycling effect Effects 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 2
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- 230000001629 suppression Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
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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 vehicle train, e.g. pedals
- 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 vehicle train, e.g. pedals
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/167—Circuit details
Definitions
- the invention relates to a method for increasing the noise immunity of a wheel sensor, in particular for a train detection system, wherein in at least one sensor channel, a transmission signal is generated, which is inductively coupled to a reception signal which is fed to an evaluation device for detecting a magnetic field change as a result of a rail vehicle driving over the track and a wheel sensor for performing the method.
- Wheel sensors are used in the rail industry for the track vacancy, but also for other switching and reporting tasks. In this case, the magnetic field influencing effect of the iron wheels of rail vehicles is predominantly utilized.
- Two-channel sensors are required for direction detection. When driving over a vehicle wheel, the two sensor channels generate consecutively time-shifted signals which are used to detect the direction of travel.
- the operating according to the inductive mode of action wheel sensors can be in addition to the one- or two-channel design in proximity switches that detect the reaction of the iron wheels on a magnetic field generating sensor, and railroad systems encompassing systems with separate transmitter and receiver. Due to the traversing wheel, the receiving system of the sensor generates a receiving voltage in the form of a rolling curve, which is also called a bell curve. When exceeding or falling below - depending on the polarity and coil arrangement - a fixed switching threshold, the wheel is considered recognized.
- the invention relates to an inductive working single or dual-channel wheel sensor with separate transmitter and receiver.
- eddy-current brakes which have been used for some years, for example on the ICE3, which due to their construction and their position close to the rail can cause a similarly high influence on the received voltage as the actual wheels and thus can lead to false counts.
- the invention will be explained in more detail below using the example of the eddy-current brake, without any intention being limited to this particular interference signal source. Rather, the subject matter of the invention relates to any interference with noise immunity caused by eddy current brakes and other similarly acting sources.
- Another possibility is to adjust the switching threshold such that the influence of the eddy current brake just barely exceeds the switching threshold and thus is not interpreted as a wheel, while the wheel itself causes an even stronger influence, which is above the switching threshold, and thus correct detected can be.
- This solution requires an accurate measurement of the interference by the eddy current brakes and is therefore very expensive and also unreliable.
- the invention has for its object to provide a method for increasing the noise immunity of a wheel sensor and a suitable wheel sensor, which allow a simple way increased interference immunity to interference voltages of different causes.
- the object is achieved in that a level difference between a useful signal to be evaluated and a noise signal in response to a noise signal-specific phase difference between the transmission signal and the received signal is maximized.
- a wheel sensor for carrying out the method according to the invention is characterized in that a device for maximizing a level distance between a to be evaluated Useful signal and a noise signal in response to a noise signal-specific phase difference between the transmission signal and the received signal is provided.
- a synchronized to the transmission signal rectifier is provided on the receiver side, which supplies the receiving voltage.
- the useful signal arises in the form of a rolling curve or bell curve to be evaluated.
- the useful signal is level dependent on the phase position between the transmitted signal and the received signal. This dependence is determined as interference-signal-specific phase difference and used for noise suppression.
- the phase position of the received signal is regulated to a maximum level value of the received signal, to which according to claim 5, an adjustable phase shifter is used.
- an adjustable phase shifter is used.
- either the synchronization signal of the rectifier or the received signal itself can be regulated or shifted.
- the adjusted phase position thus provides the highest possible level value of the received signal.
- a further phase shift of the received signal by an eddy current brake automatically leads to a reduction of the influence, because the maximum influence is no longer reached.
- phase difference is determined and used to attenuate the causing interference signal.
- the phase-position signal is linked to the actual received signal in such a way that a phase change acts in a dampening manner on the received signal, as a result of which this interference-induced influencing is reduced or extinguished.
- Both figures each illustrate a sensor channel with a transmitter 1 and a receiver 2, which are arranged on both sides of a railroad track 3 and inductively coupled 4.
- Transmitter 1 and receiver 2 are designed as resonant circuits.
- the coupling 4 and thus the reception AC voltage changes such that a rolling curve in the form of a bell curve is formed. This signal overshoot is used for wheel detection.
- the reception alternating voltage 5 is rectified in phase with the transmitter 1 6, smoothed in the subsequent low-pass filter 7 and then amplified 8.
- the resulting analog signal 9 is evaluated in an evaluation device 10, preferably a microprocessor.
- the evaluation device 10 performs a sensor adjustment by means of a variable phase shifter 11.
- the evaluation device 10 generates a control signal 12, which adjusts the phase shifter 11 such that, starting from the original synchronization signal 13 of the transmitter 1, the received signal 5 is shifted 14 until the analog signal 9 reaches a maximum.
- noise-induced Phase shifts ie phase differences between the transmission signal and the reception signal quasi-back regulated, so that the signal to be evaluated 9 is in the optimum phase range for wheel detection and suboptimal phase range of the interference.
- the phase difference 16 between the transmission signal 13 and the received signal 5 is determined in a processing unit 15 and the evaluation device 10, respectively.
- the evaluation device 10 evaluates the analog signal 9 as a function of the determined phase difference 16 with respect to its level, wherein a phase difference 16 corresponding noise level is subtracted.
- a sensor adjustment ie a phase adjustment by means of a phase shifter 11 according to Fig. 1 , dispensable.
- the determination of the phase difference 16 by the processing unit 15 can also be taken over by the evaluation device 10, as a result of which a special processing unit 15 can be dispensed with.
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measuring Fluid Pressure (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Erhöhung der Störsicherheit eines Radsensors, insbesondere für eine Gleisfreimeldeanlage, wobei in mindestens einem Sensorkanal ein Sendesignal erzeugt wird, das induktiv mit einem Empfangssignal gekoppelt ist, welches einer Auswerteeinrichtung zur Erfassung einer Magnetfeldänderung infolge eines das Gleis überfahrenden Schienenfahrzeuges zugeführt ist sowie einen Radsensor zur Durchführung des Verfahrens.The invention relates to a method for increasing the noise immunity of a wheel sensor, in particular for a train detection system, wherein in at least one sensor channel, a transmission signal is generated, which is inductively coupled to a reception signal which is fed to an evaluation device for detecting a magnetic field change as a result of a rail vehicle driving over the track and a wheel sensor for performing the method.
Radsensoren werden im Bahnwesen für die Gleisfreimeldung, aber auch für andere Schalt- und Meldeaufgaben eingesetzt. Dabei wird überwiegend die magnetfeldbeeinflussende Wirkung der Eisenräder der Schienenfahrzeuge ausgenutzt. Für die Fahrtrichtungserkennung werden zweikanalige Sensoren benötigt. Beim Überfahren eines Fahrzeugrades erzeugen die beiden Sensorkanäle nacheinander zeitlich versetzte Signale, die zur Fahrtrichtungserkennung benutzt werden.Wheel sensors are used in the rail industry for the track vacancy, but also for other switching and reporting tasks. In this case, the magnetic field influencing effect of the iron wheels of rail vehicles is predominantly utilized. Two-channel sensors are required for direction detection. When driving over a vehicle wheel, the two sensor channels generate consecutively time-shifted signals which are used to detect the direction of travel.
Die nach dem induktiven Wirkprinzip arbeitenden Radsensoren lassen sich neben der ein- oder zweikanaligen Bauweise auch in Näherungsschalter, die die Rückwirkung der Eisenräder auf einen ein Magnetfeld erzeugenden Sensor erfassen, und die Eisenbahnschienen umgreifende Systeme mit getrenntem Sender und Empfänger einteilen. Durch das überfahrende Rad entsteht im Empfangssystem des Sensors eine Empfangsspannung in der Form einer Abrollkurve, die auch als Glockenkurve bezeichnet wird. Bei Über- oder Unterschreitung - je nach Polung und Spulenanordnung - einer festen Schaltschwelle gilt das Rad als erkannt. Die Erfindung bezieht sich auf einen induktiv arbeitenden ein- oder zweikanaligen Radsensor mit getrenntem Sender und Empfänger.The operating according to the inductive mode of action wheel sensors can be in addition to the one- or two-channel design in proximity switches that detect the reaction of the iron wheels on a magnetic field generating sensor, and railroad systems encompassing systems with separate transmitter and receiver. Due to the traversing wheel, the receiving system of the sensor generates a receiving voltage in the form of a rolling curve, which is also called a bell curve. When exceeding or falling below - depending on the polarity and coil arrangement - a fixed switching threshold, the wheel is considered recognized. The invention relates to an inductive working single or dual-channel wheel sensor with separate transmitter and receiver.
Allen induktiv arbeitenden Sensoren ist gemeinsam, dass sie störempfindlich sind gegenüber induktiv eingekoppelten Störspannungen im Bereich der Arbeitsfrequenz.All inductively operating sensors have in common that they are susceptible to interference with inductively coupled interference voltages in the range of the working frequency.
Eine Quelle dafür sind die seit einigen Jahren, beispielsweise beim ICE3, eingesetzten Wirbelstrombremsen, die durch ihren Aufbau und ihre Position in Schienennähe eine ähnlich hohe Beeinflussung der Empfangsspannung wie die eigentlichen Räder verursachen und somit zu Fehlzählungen führen können. Die Erfindung wird nachfolgend am Beispiel der Wirbelstrombremse näher ausgeführt, ohne dass eine Beschränkung auf diese spezielle Störsignalquelle beabsichtigt ist. Vielmehr bezieht sich der Gegenstand der Erfindung auf jegliche Beeinträchtigung der Störsicherheit, die durch Wirbelstrombremsen und andere, ähnlich wirkende Quellen verursacht sind.One source for this are the eddy-current brakes which have been used for some years, for example on the ICE3, which due to their construction and their position close to the rail can cause a similarly high influence on the received voltage as the actual wheels and thus can lead to false counts. The invention will be explained in more detail below using the example of the eddy-current brake, without any intention being limited to this particular interference signal source. Rather, the subject matter of the invention relates to any interference with noise immunity caused by eddy current brakes and other similarly acting sources.
Um die Störsicherheit der Sensoren gegenüber diesen Störgrößen zu erhöhen, sind verschiedene sensorbauartspezifische Lösungsansätze bekannt. Bei den gattungsgemäßen Radsensoren mit getrennten Sender- und Empfängerschwingkreisen wird gemäß der
Eine weitere Möglichkeit besteht darin, die Schaltschwelle derart zu justieren, dass die Beeinflussung der Wirbelstrombremse gerade noch nicht die Schaltschwelle überschreitet und somit nicht als Raderkennung interpretiert wird, während das Rad selbst eine noch stärkere Beeinflussung hervorruft, die oberhalb der Schaltschwelle liegt, und somit korrekt detektiert werden kann. Diese Lösung setzt eine genaue Messung der Störbeeinflussung durch die Wirbelstrombremsen voraus und ist folglich sehr aufwendig und außerdem unzuverlässig.Another possibility is to adjust the switching threshold such that the influence of the eddy current brake just barely exceeds the switching threshold and thus is not interpreted as a wheel, while the wheel itself causes an even stronger influence, which is above the switching threshold, and thus correct detected can be. This solution requires an accurate measurement of the interference by the eddy current brakes and is therefore very expensive and also unreliable.
Eine Alternative zur Schaltschwellenjustierung ist eine Justierung der Wirbelstrombremse, damit eine maximal zulässige Beeinflussung nicht überschritten wird. Diese Lösung ist gleichermaßen aufwendig und unzuverlässig und darüber hinaus wenig praktikabel.An alternative to the switching threshold adjustment is an adjustment of the eddy current brake, so that a maximum permissible influence is not exceeded. This solution is equally costly and unreliable and, moreover, not very practical.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Erhöhung der Störsicherheit eines Radsensors sowie einen dazu geeigneten Radsensor anzugeben, die auf einfache Weise eine erhöhte Störsicherheit gegenüber Störspannungen verschiedener Ursachen ermöglichen.The invention has for its object to provide a method for increasing the noise immunity of a wheel sensor and a suitable wheel sensor, which allow a simple way increased interference immunity to interference voltages of different causes.
Verfahrensgemäß wird die Aufgabe dadurch gelöst, dass ein Pegelabstand zwischen einem auszuwertenden Nutzsignal und einem Störsignal in Abhängigkeit von einer störsignalspezifischen Phasendifferenz zwischen dem Sendesignal und dem Empfangssignal maximiert wird.According to the method, the object is achieved in that a level difference between a useful signal to be evaluated and a noise signal in response to a noise signal-specific phase difference between the transmission signal and the received signal is maximized.
Dabei wird die Tatsache ausgenutzt, dass die Wirbelstrombremse im Gegensatz zum Rade durch ihren induktiv wirkenden Aufbau die Phasenlage zwischen Sendesignal und Empfangssignal verändert. Diese Veränderung der Phasenlage wird zur Reduktion der Störbeeinflussung genutzt. Die Schaltschwellen zur Raderkennung bedürfen folglich keiner aufwendigen und genauen Justage. Ebenso entfällt eine Justierung jeder einzelnen Wirbelstrombremse an dem Schienenfahrzeug.In this case, the fact is exploited that the eddy current brake in contrast to the Rade changed by their inductively acting structure, the phase angle between the transmission signal and the received signal. This change in the phase position is used to reduce the interference. The switching thresholds for wheel recognition therefore require no complex and accurate adjustment. Likewise, an adjustment of each individual eddy current brake on the rail vehicle is eliminated.
Ein Radsensor zur Durchführung des Verfahrens ist erfindungsgemäß dadurch gekennzeichnet, dass eine Einrichtung zur Maximierung eines Pegelabstandes zwischen einem auszuwertenden Nutzsignal und einem Störsignal in Abhängigkeit von einer störsignalspezifischen Phasendifferenz zwischen dem Sendesignal und dem Empfangssignal vorgesehen ist. Üblicherweise ist empfängerseitig ein auf das Sendesignal synchronisierter Gleichrichter vorgesehen, der die Empfangsspannung liefert. Bei Radüberfahrt entsteht das Nutzsignal in Form einer auszuwertenden Abrollkurve oder Glockenkurve. Das Nutzsignal ist pegelmäßig abhängig von der Phasenlage zwischen Sendesignal und Empfangssignal. Diese Abhängigkeit wird als störsignalspezifische Phasendifferenz ermittelt und zur Störsignalunterdrückung benutzt.A wheel sensor for carrying out the method according to the invention is characterized in that a device for maximizing a level distance between a to be evaluated Useful signal and a noise signal in response to a noise signal-specific phase difference between the transmission signal and the received signal is provided. Usually, a synchronized to the transmission signal rectifier is provided on the receiver side, which supplies the receiving voltage. When cycling, the useful signal arises in the form of a rolling curve or bell curve to be evaluated. The useful signal is level dependent on the phase position between the transmitted signal and the received signal. This dependence is determined as interference-signal-specific phase difference and used for noise suppression.
Dazu ist gemäß Anspruch 2 vorgesehen, dass die Phasenlage des Empfangssignals auf einen maximalen Pegelwert des Empfangssignals geregelt wird, wobei dazu gemäß Anspruch 5 ein einstellbarer Phasenschieber dient. Dabei kann entweder das Synchronisationssignal des Gleichrichters oder das Empfangssignal selbst geregelt bzw. verschoben werden. Die eingestellte Phasenlage liefert somit den größtmöglichen Pegelwert des Empfangssignals. Eine weitere Phasenverschiebung des Empfangssignals durch eine Wirbelstrombremse führt automatisch zu einer Reduzierung der Beeinflussung, weil die maximale Beeinflussung nicht mehr erreicht wird.For this purpose, it is provided according to
Eine andere bevorzugte Ausführungsform zur Maximierung des Pegelabstandes zwischen Nutzsignal und Störsignal besteht gemäß Anspruch 3 bzw. gemäß Anspruch 6 darin, dass die Phasendifferenz ermittelt wird und zur Dämpfung des verursachenden Störsignals verwendet wird. Das Phasenlagensignal wird dabei mit dem eigentlichen Empfangssignal derart verknüpft, dass eine Phasenveränderung dämpfend auf das Empfangssignal wirkt, wodurch diese störsignalbedingte Beeinflussung reduziert oder ausgelöscht wird.Another preferred embodiment for maximizing the level difference between useful signal and interference signal is according to claim 3 or claim 6 in that the phase difference is determined and used to attenuate the causing interference signal. In this case, the phase-position signal is linked to the actual received signal in such a way that a phase change acts in a dampening manner on the received signal, as a result of which this interference-induced influencing is reduced or extinguished.
Die Erfindung wird nachfolgend anhand figürlicher Darstellungen näher erläutert:The invention is explained in more detail below with reference to figurative representations:
Es zeigen:
Figur 1- ein Blockschaltbild einer ersten Ausführungsform eines Radsensors und
Figur 2- eine zweite Ausführungsform eines Radsensors in gleichartiger Darstellung wie
Figur 1
- FIG. 1
- a block diagram of a first embodiment of a wheel sensor and
- FIG. 2
- a second embodiment of a wheel sensor in a similar representation as
FIG. 1
Beide Figuren veranschaulichen jeweils einen Sensorkanal mit einem Sender 1 und einem Empfänger 2, welche beiderseits einer Eisenbahnschiene 3 angeordnet und induktiv gekoppelt 4 sind. Sender 1 und Empfänger 2 sind als Schwingkreise ausgebildet. Bei Radüberfahrt durch ein Schienenfahrzeug verändert sich die Kopplung 4 und damit die Empfangswechselspannung derart, dass eine Abrollkurve in Form einer Glockenkurve entsteht. Diese Signalüberhöhung wird zur Raderkennung benutzt. Die Empfangswechselspannung 5 wird phasensynchron zum Sender 1 gleichgerichtet 6, im nachfolgenden Tiefpass 7 geglättet und anschließend verstärkt 8. Das resultierende analoge Signal 9 wird in einer Auswerteeinrichtung 10, vorzugsweise einen Mikroprozessor, bewertet.Both figures each illustrate a sensor channel with a
Um eine Störung der Signalverarbeitung durch eine Wirbelstrombremse zu minimieren, ist gemäß
Bei der in
Claims (6)
- Method for increasing the interference resistance of a wheel sensor, in particular for a track-free signaling installation, wherein a transmission signal (13) is produced in at least one sensor channel and is inductively coupled (4) to a received signal (5) which is supplied to an evaluation device (10) in order to detect a magnetic field change as a consequence of a rail vehicle traveling over the track (3), characterized in that
a level separation between a useful signal to be evaluated and an interference signal is maximized as a function of an interference-signal-specific phase difference (16) between the transmission signal (13) and the received signal (5). - Method according to Claim 1,
characterized in that
the level separation is maximized by regulating the phase angle of the received signal (5) at a maximum level value of the received signal (5). - Method according to Claim 1,
characterized in that
the level separation is maximized by determining the phase difference (16) and by using it to attenuate the interference signal causing it. - Wheel sensor for carrying out the method according to one of the preceding claims,
characterized in that
a device is provided in order to maximize a level separation between a useful signal to be evaluated and an interference signal as a function of an interference-signal-specific phase difference (16) between the transmission signal (13) and the received signal (5). - Wheel sensor according to Claim 4,
characterized in that
the device has a phase shift (11) which can be regulated at the maximum level value of the received signal (5). - Wheel sensor according to Claim 4,
characterized in that
the device has a processing unit (15) for detection of the phase difference (16), which acts on an attenuation unit in order to attenuate the interference signal causing it.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008008028A DE102008008028A1 (en) | 2008-02-04 | 2008-02-04 | Method for increasing the interference immunity of a wheel sensor and wheel sensor for carrying out the method |
| PCT/EP2009/050166 WO2009098101A1 (en) | 2008-02-04 | 2009-01-08 | Method for increasing the interference resistance of a wheel sensor and wheel sensor for carrying out the method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2240357A1 EP2240357A1 (en) | 2010-10-20 |
| EP2240357B1 true EP2240357B1 (en) | 2011-06-29 |
Family
ID=40566174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09707219A Active EP2240357B1 (en) | 2008-02-04 | 2009-01-08 | Method for increasing the interference resistance of a wheel sensor and wheel sensor for carrying out the method |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2240357B1 (en) |
| CN (1) | CN101939201B (en) |
| AT (1) | ATE514611T1 (en) |
| AU (1) | AU2009211471B2 (en) |
| DE (1) | DE102008008028A1 (en) |
| DK (1) | DK2240357T3 (en) |
| WO (1) | WO2009098101A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19709840C2 (en) * | 1997-02-28 | 2001-10-04 | Siemens Ag | Axle counting device to distinguish between wheel influences and non-wheel influences |
| DE10122980A1 (en) | 2001-05-11 | 2002-11-14 | Alcatel Sa | Wheel sensor device (rail contact) in track systems, with means for protection against electromagnetic interference |
| EP1468891B1 (en) * | 2003-04-14 | 2005-06-08 | Alcatel | Method for increasing the signal/noise ratio of axle counters systems |
| ES2247447T3 (en) * | 2003-04-29 | 2006-03-01 | Siemens Schweiz Ag | PROCEDURE FOR THE DETECTION OF THE OCCUPATION OF THE RAILWAYS. |
| CN2661525Y (en) * | 2003-11-20 | 2004-12-08 | 徐大年 | Anti interference wheel detector |
-
2008
- 2008-02-04 DE DE102008008028A patent/DE102008008028A1/en not_active Ceased
-
2009
- 2009-01-08 WO PCT/EP2009/050166 patent/WO2009098101A1/en active Application Filing
- 2009-01-08 CN CN200980104117.1A patent/CN101939201B/en active Active
- 2009-01-08 AU AU2009211471A patent/AU2009211471B2/en not_active Ceased
- 2009-01-08 AT AT09707219T patent/ATE514611T1/en active
- 2009-01-08 DK DK09707219.3T patent/DK2240357T3/en active
- 2009-01-08 EP EP09707219A patent/EP2240357B1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009098101A1 (en) | 2009-08-13 |
| AU2009211471A1 (en) | 2009-08-13 |
| DE102008008028A1 (en) | 2009-11-26 |
| CN101939201B (en) | 2013-05-15 |
| AU2009211471B2 (en) | 2013-09-05 |
| DK2240357T3 (en) | 2011-10-17 |
| EP2240357A1 (en) | 2010-10-20 |
| CN101939201A (en) | 2011-01-05 |
| ATE514611T1 (en) | 2011-07-15 |
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