EP2146886B1 - Capteur de roue - Google Patents
Capteur de roue Download PDFInfo
- Publication number
- EP2146886B1 EP2146886B1 EP08759473A EP08759473A EP2146886B1 EP 2146886 B1 EP2146886 B1 EP 2146886B1 EP 08759473 A EP08759473 A EP 08759473A EP 08759473 A EP08759473 A EP 08759473A EP 2146886 B1 EP2146886 B1 EP 2146886B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- transmitter
- signal
- wheel
- channel
- 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.)
- Not-in-force
Links
- 238000012545 processing Methods 0.000 claims abstract description 28
- 230000001360 synchronised effect Effects 0.000 claims description 15
- 238000011156 evaluation Methods 0.000 claims description 3
- 230000011664 signaling Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000036039 immunity Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004804 winding Methods 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
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/167—Circuit details
-
- 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
Definitions
- the invention relates to a wheel sensor, in particular for a Gleisokomelde worn, with two inductively operating sensor channels having separated by a railway track transmitter and receiver, a processing unit for level evaluation of received signals of the affected by a wheel passage sensor channel and the other, uninfluenced sensor channel is provided Means for linking, in particular subtraction, the received signals of the uninfluenced and the affected sensor channel has.
- Wheel sensors are used in the rail industry for the track vacancy, but also for other switching and reporting tasks. In this case, predominantly the magnetic field influencing effect of the iron wheels of rail vehicles is utilized.
- Two-channel sensors are needed to detect the train's direction of travel. 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.
- the invention relates to a two-channel wheel sensor with separate transmitters and receivers.
- One cause of the disturbances are rail currents, which are caused by the return current of a locomotive, wherein a harmonic content in the receiver can induce a disturbance signal in the form of beats.
- This beating which is superimposed on the received voltage, is difficult to separate from the wheel influence to be detected, because here low-pass filters in principle fail.
- Another cause of interference voltages can also be arranged adjacent other sensors or sensor channels, which are operated at the same operating frequency and lead by mutual influence of their transmitter to beats.
- the DE 33 02 883 A1 discloses a circuit arrangement for generating Achsterrorismen, wherein by bandpass filtering a reduction of noise voltages is sought.
- a two-channel wheel sensor is known in which the two transmitters are operated at the same frequency but with a 90 ° phase shift in order to reduce the mutual influence of the transmitters.
- the invention has for its object to provide a generic wheel sensor having a simple design, increased interference immunity to interference voltages of different causes.
- the object is achieved in that the two receivers each have a receiver resonant circuit whose output is fed via a synchronous rectifier, which is controlled by the transmitter of the other sensor channel, a low-pass filter and a signal amplifier of the processing unit.
- the output signal of each receiver resonant circuit in each case to process a signal processing channel.
- a sum signal is produced at the receiving end on the first or the second signal processing channel which contains the useful signal with a superimposed interference signal.
- the other, uninfluenced signal processing channel is acted upon only by the interference signal, so that the useful signal can be determined by subtraction in the processing unit.
- the demodulation of the received signal takes place in each signal processing channel by synchronous rectification, that is, the phase position of the transmitter acts on the synchronous rectifier for the phase-synchronous rectification of the received alternating signal.
- Synchronization signals of both transmitters are fed virtually cross-over to the synchronous rectifier of the other channel.
- the received signal is again decomposed into its transmitter-specific frequency components and rectified.
- the following lowpass serves to suppress the beats that have developed on the transmitter side. After the low-pass filter is followed by a signal amplifier for level adjustment, the output signal of the processing unit, in particular a microprocessor, is evaluated.
- each sensor channel is equipped with a transmitter-resonant circuit, wherein the two transmitter-resonant circuits have different operating frequencies. These operating frequencies differ in an order of magnitude in which the beats resulting from the coupling in of the respective other transmitter / oscillator circuit can be suppressed by a low-pass filter on the receiver side.
- the operating frequencies may be 40 kHz and 45 kHz.
- the output signal of each receiver resonant circuit is supplied to two signal processing channels with synchronous rectifier, low pass filter and signal amplifier, wherein a synchronous rectifier is driven by the transmitter of the one sensor channel and the other synchronous rectifier by the transmitter of the other sensor channel.
- no signal processing channel must be used twice, that is, depending on the wheel crossing influenced state of the sensor channel either the sum signal or the noise processing.
- the level evaluation in the processing unit is simplified, since a separate signal processing channel and thus a specific input for the processing unit are available for each input signal required, namely the sum signal and interference signal for the one sensor channel and the sum signal and interference signal for the other sensor channel. Ultimately, the safety of the wheel sensor function increases.
- the figure shows a block diagram of a wheel sensor.
- transmitter resonant circuits 2 and 3 and receiver resonant circuits 4 and 5 are arranged, which are associated with two sensor channels A and B.
- the two transmitter resonant circuits 2 and 3 are tuned to different operating frequencies, for example 40 kHz and 45 kHz.
- two time-shifted signals are generated, which are used for direction detection.
- the received signals 8 and 9 are fed respectively into two signal processing channels 10a and 10b or 11a and 11b whose essential components are synchronous rectifiers 12a and 12b and 13a and 13b, low-pass filters 14a and 14b and 15a and 15b and signal amplifiers 16a and 16b and 17a and 17b, respectively.
- the synchronous rectifiers 12a and 13a are driven by the transmitter oscillation circuit 2 of the first sensor channel A
- the synchronous rectifiers 12b and 13b are driven by the transmitter oscillation circuit 3 of the second sensor channel B.
- the phase position 18 or 19 serves for this activation, whereby the synchronous rectifiers 12a and 13a or 12b and 13b can perform a phase-synchronized rectification of the received signal 8 or 9 formed as an alternating signal.
- the received signal 8 or 9 is divided into its transmitter-specific frequency components, namely on the signal processing channels 10a and 11a for the sensor channel A and on the signal processing channels 10b and 11b for the sensor channel B.
- cross-demodulation is from a signal processing channel 10b and 11a of the associated sensor channels A and B demodulated that signal component, that is filtered out, on the operating frequency of the other sensor channel B or A from an external Source of interference in the receiver resonant circuit 4 or 5 was induced.
- the signals on the two other signal processing channels 10a and 11b are obtained by the demodulation of the received signals 8 or 9 coupled in directly at the wheel crossing of the transmitter resonant circuit 2 or 3.
- the signal processing channels 10a and 11b sum signals that contain the useful signal and the interference signal, and on the two other signal processing channels 10b and 11a, only the interfering signals.
- the subsequent low-pass filter 14a, 14b, 15a, 15b of each of the four signal processing channels 10a, 10b, 11a, 11b the beats resulting from the coupling of the respective other transmitter resonant circuit 2 and 3 are suppressed.
- This low-pass filtering is possible because of the different operating frequencies of the transmitter resonant circuits 2 and 3.
- the low-pass filter 14a, 14b, 15a, 15b is connected to inputs U_a and U_b as well as U_b_stör and U_a_stör of a microprocessor 20 via the signal amplifiers 16a, 16b, 17a, 17b serving for level matching.
- the inputs U_a and U_b represent the two sum signals and U_b_stör and U_a_stör the two interference signals.
- the microprocessor 20 combines the analog signals U_a and U_a_stör and U_b and U_b_stör with the possibilities of digital signal processing and generates an output signal 21 and 22, which is the difference U_a - U_a_stör and U_b - U_b_stör in the simplest case, and ultimately decides whether registered a bike crossing or not, or if an error message is issued.
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Measuring Fluid Pressure (AREA)
- Pinball Game Machines (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Claims (3)
- Capteur de roue, notamment sur un dispositif d'indication de la voie libre, comprenant deux canaux (A, B) de capteur travaillant par induction et ayant des émetteurs et récepteurs séparés par un rail (1) de chemin de fer, dans lequel une unité de traitement est prévue pour l'évaluation du niveau de signaux (8,9) de réception du canal (A ou B) de capteur influencé par un passage de la roue, qui a des moyens de combinaison, notamment de soustraction, de signaux (8, 9) de réception du canal (A) de capteur non influencé et du canal (B) de capteur influencé,
caractérisé en ce que
les deux récepteurs ont respectivement un circuit (4, 5) oscillant de récepteur, dont le signal de sortie est envoyé par un redresseur (12b, 13a) synchrone, qui est commandé par l'émetteur de l'autre canal (A, B) de capteur, à un filtre (14b, 15a) passe bas et à un amplificateur (16b, 17a) de signal de l'unité de traitement. - Capteur de roue suivant la revendication 1,
caractérisé en ce qu'aux canaux (A, B) de capteur sont associés des circuits (2, 3) oscillants d'émetteur, qui ont des fréquences de travail différentes. - Capteur de roue suivant l'une des revendications précédentes,
caractérisé en ce que le signal de sortie de chaque circuit (4, 5) oscillant de récepteur est envoyé à deux canaux (10a, 10b, 11a, 11b) de traitement du signal, ayant des redresseurs (12a, 12b, 13a, 13b) synchrones, des filtres (14a, 14b, 15a, 15b) passe bas et des amplificateurs (16a, 16b, 17a, 17b) de signal, un redresseur (12a, 13a) synchrone étant commandé par l'émetteur de l'un des canaux (A) de capteur et l'autre redresseur (12b, 13b) synchrone étant commandé par l'émetteur de l'autre canal (B) de capteur.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007023475A DE102007023475B4 (de) | 2007-05-15 | 2007-05-15 | Radsensor |
PCT/EP2008/055695 WO2008138858A1 (fr) | 2007-05-15 | 2008-05-08 | Capteur de roue |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2146886A1 EP2146886A1 (fr) | 2010-01-27 |
EP2146886B1 true EP2146886B1 (fr) | 2011-01-26 |
Family
ID=39712477
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08759473A Not-in-force EP2146886B1 (fr) | 2007-05-15 | 2008-05-08 | Capteur de roue |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2146886B1 (fr) |
AT (1) | ATE496812T1 (fr) |
DE (2) | DE102007023475B4 (fr) |
WO (1) | WO2008138858A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011081424A1 (de) * | 2011-08-23 | 2013-02-28 | Siemens Aktiengesellschaft | Verfahren zum Erfassen von Zustandsänderungen in einer Anordnung und Anordnung zum Erfassen von Zustandsänderungen |
CN103552581B (zh) * | 2013-11-12 | 2016-01-13 | 哈尔滨理工大学 | 车轮传感器 |
CN105329258B (zh) * | 2015-11-20 | 2017-03-15 | 重庆微标科技股份有限公司 | 适用于磁钢在线故障诊断的信号获取电路、装置及系统 |
PL229703B1 (pl) * | 2016-04-28 | 2018-08-31 | Bombardier Transp Zwus Polska Spolka Z Ograniczona Odpowiedzialnoscia | Zintegrowany układ czujnika do wykrywania koła pojazdu szynowego |
DE102016211354A1 (de) * | 2016-06-24 | 2017-12-28 | Siemens Aktiengesellschaft | Sendereinrichtung, Sensoreinrichtung und Verfahren zum Erfassen einer Magnetfeldänderung |
EP3916434B1 (fr) * | 2020-05-27 | 2024-04-03 | Siemens Mobility GmbH | Détecteur de roue et procédé de détection d'une roue sur rail |
DE102021212809A1 (de) * | 2021-11-15 | 2023-05-17 | Siemens Mobility GmbH | Sensoreinrichtung und Verfahren zum Erfassen einer Magnetfeldänderung |
DE102023103783B3 (de) | 2023-02-16 | 2024-03-28 | Scheidt & Bachmann Gmbh | Achszählersystem zum Überwachen eines Gleisabschnitts eines Schienensystems |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3206611C1 (en) * | 1982-02-24 | 1983-10-06 | Siemens Ag | Rail contact |
DE3302883A1 (de) * | 1983-01-28 | 1984-08-02 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zum erzeugen von achszaehlimpulsen fuer achszaehlanlagen |
DD246089A1 (de) * | 1986-02-19 | 1987-05-27 | Werk F Signal Und Sicherungste | Schaltungsanordnung zur ueberwachung von achszaehleinrichtungen |
DD246090A1 (de) * | 1986-02-19 | 1987-05-27 | Werk F Signal Und Sicherungste | Schaltungsanordnung zur erzeugung stoerungsfreier, richtungsabhaengiger signale in achszaehleinrichtungen |
DE4240478A1 (de) | 1992-12-02 | 1994-06-09 | Sel Alcatel Ag | Achszählvorrichtung |
DE19545234C2 (de) * | 1995-11-22 | 2001-12-13 | Siemens Ag | Einrichtung zum Erkennen von Leitungsunterbrechungen in Achszählanlagen |
DE19638956A1 (de) * | 1996-09-12 | 1998-03-19 | Siemens Ag | Anschaltbaugruppe |
AT406139B (de) | 1998-04-08 | 2000-02-25 | Frauscher Josef | Radsensor |
DE10122980A1 (de) | 2001-05-11 | 2002-11-14 | Alcatel Sa | Radsensoreinrichtung (Schienenkontakt) bei Gleisanlagen, mit Mitteln zum Schutz vor elektromagnetischen Störungen |
DE10123673A1 (de) * | 2001-05-16 | 2002-11-21 | Alcatel Sa | Induktiver Schienenkontakt |
DE10137519A1 (de) | 2001-07-30 | 2003-02-13 | Siemens Ag | Radsensor |
ATE317788T1 (de) | 2003-12-08 | 2006-03-15 | Cit Alcatel | Verfahren zur phasenmodulation eines elektrischen und elektromagnetischen schwingkreises, insbesondere für achszähler |
-
2007
- 2007-05-15 DE DE102007023475A patent/DE102007023475B4/de not_active Expired - Fee Related
-
2008
- 2008-05-08 EP EP08759473A patent/EP2146886B1/fr not_active Not-in-force
- 2008-05-08 AT AT08759473T patent/ATE496812T1/de active
- 2008-05-08 DE DE502008002480T patent/DE502008002480D1/de active Active
- 2008-05-08 WO PCT/EP2008/055695 patent/WO2008138858A1/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
DE102007023475B4 (de) | 2009-07-09 |
DE102007023475A1 (de) | 2008-12-11 |
EP2146886A1 (fr) | 2010-01-27 |
DE502008002480D1 (de) | 2011-03-10 |
WO2008138858A1 (fr) | 2008-11-20 |
ATE496812T1 (de) | 2011-02-15 |
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