EP2146886B1 - Capteur de roue - Google Patents

Capteur de roue Download PDF

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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
Application number
EP08759473A
Other languages
German (de)
English (en)
Other versions
EP2146886A1 (fr
Inventor
Rainer Freise
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2146886A1 publication Critical patent/EP2146886A1/fr
Application granted granted Critical
Publication of EP2146886B1 publication Critical patent/EP2146886B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 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.

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  • 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)
  • Measuring Fluid Pressure (AREA)
  • Pinball Game Machines (AREA)

Claims (3)

  1. 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.
  2. 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.
  3. 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.
EP08759473A 2007-05-15 2008-05-08 Capteur de roue Not-in-force EP2146886B1 (fr)

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)

* Cited by examiner, † Cited by third party
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***
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)

* Cited by examiner, † Cited by third party
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
EP1541440B1 (fr) * 2003-12-08 2006-02-15 Alcatel Procédé pour modulation de phase d'un circuit résonant électrique et électromagnétique, particulièrement pour compteurs d'essieux

Also Published As

Publication number Publication date
EP2146886A1 (fr) 2010-01-27
WO2008138858A1 (fr) 2008-11-20
ATE496812T1 (de) 2011-02-15
DE102007023475A1 (de) 2008-12-11
DE102007023475B4 (de) 2009-07-09
DE502008002480D1 (de) 2011-03-10

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