EP2146886A1 - Wheel sensor - Google Patents
Wheel sensorInfo
- Publication number
- EP2146886A1 EP2146886A1 EP08759473A EP08759473A EP2146886A1 EP 2146886 A1 EP2146886 A1 EP 2146886A1 EP 08759473 A EP08759473 A EP 08759473A EP 08759473 A EP08759473 A EP 08759473A EP 2146886 A1 EP2146886 A1 EP 2146886A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- signal
- transmitter
- channel
- wheel
- 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
- 238000012545 processing Methods 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 230000001360 synchronised effect Effects 0.000 claims description 14
- 238000011156 evaluation Methods 0.000 claims description 3
- 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
- 238000013461 design Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000036039 immunity Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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 Gleisokomeldeirriated, with two inductively operating sensor channels having separated by a railroad transmitter and receiver.
- 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 a vehicle wheel, the two sensor channels create sequentially offset in time ⁇ Sig nal, which are used for direction detection.
- 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.
- a cause of the disturbances are rail currents, which arise through the return current of a locomotive, whereby a harmonic content in the receiver generates a disturbance signal in the form of can induce exercise.
- This beating which is superimposed on the received voltage, is difficult to separate from the wheel influence to be detected, because in this case low-pass filters fail as a matter of principle.
- 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.
- Winding can be achieved, as described in DE 19 915 597 Al and DE 10 137 519 Al.
- the invention has for its object to provide a gattungsge ⁇ MAESSEN wheel sensor having a simple design, increased interference immunity to interference voltages of different causes.
- Processing unit for level evaluation of received signals of the sensor influenced by a wheel passage sensor channel and the other, uninfluenced sensor channel is provided, wherein the processing unit comprises means for linking, in particular subtraction, the received signals of the uninfluenced and the affected sensor channel. Consequently, the two Sen ⁇ sorkanäle set next to a sum signal that includes a desired signal and an interfering signal, the interfering signal also available, which is used for large compensation of the induced interference by subtracting from the sum signal.
- each sensor channel is equipped with a transmitter-resonant circuit, wherein the two transmitter-Schwing ⁇ 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 oscillation circuit can be suppressed by a low-pass filter on the receiver side.
- the operating frequencies may be 40 kHz and 45 kHz.
- a wheel sensor for detecting a Radbeein kgung is characterized according to claim 3, characterized in that the two receivers each have a receiver resonant circuit, the Aus ⁇ output signal 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 is supplied.
- a sum signal, containing the wanted signal with superimposed interference signal is produced on the first or the second Sig ⁇ nal kauskanal.
- 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 is carried out in each signal ⁇ processing channel by synchronous rectification, that is, the phase of the transmitter acts on the synchronous rectifier ⁇ rectifier for 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. As a result, the received signal is back in his transmitter-specific frequency components decomposed 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 receiver Schwingkrei- ses two signal processing channels with synchronous rectifier, low pass filter and signal amplifier is supplied, wherein a synchronous rectifier of the transmitter of the one sensor channel and the other synchronous rectifier is driven 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 for each required input signal, namely the sum signal and interference signal for the one sensor channel and the sum ⁇ signal and interference signal for the other sensor channel, a sepa ⁇ rater signal processing channel and thus a specific input for the processing unit available stands. Ultimately, the safety of the wheel sensor function increases.
- the figure shows a block diagram of a wheel sensor.
- the received signals 8 and 9 are each fed into two signal processing channels 10a and 10b or IIa and IIb whose essential components are synchronous rectifiers 12a and 12b or 13a and 13b, low-pass filters 14a and 14b or 15a and 15b and signal amplifiers 16a and 16b or 17a and 17b are.
- the synchronous rectifier 12a and 13a ⁇ the driven from the transmitter resonant circuit 2 of the first sensor channel A and the synchronous rectifier 12b and 13b are controlled by the station resonant circuit 3 of the second sensor channel B at ⁇ .
- the phase position 18 be ⁇ tion 19, whereby the synchronous rectifier 12a and 13a or 12b and 13b can perform a phase-synchronous Gleich ⁇ direction of the receiving signal formed as an alternating signal 8 and 9 respectively.
- the received signal is 8 or 9 decomposed into its sender's specifi ⁇ frequency components, namely on the signal processing channels 10a and IIa for the sensor channel A and the signal processing channels 10b and IIb for the sensor channel B.
- the subsequent low-pass filter 14a, 14b, 15a, 15b of each of the four Signalverarbei ⁇ processing channels 10a, 10b, IIa, IIb by the Einkopp- development of the respective other transmitter resonant circuit can be suppressed 2 relationship ⁇ , 3 beats caused.
- This low-pass filtering ⁇ is possible because of the different operating frequencies of the transmitter resonant circuits 2 and 3.
- FIG. The low-pass 14a, 14b, 15a, 15b is connected via the signal amplifier 16a, 16b, 17a, 17b, which is used for level adjustment, with inputs U_A and U_b and U_b_stör U_a_stör and a microprocessor 20 verbun ⁇ .
- the inputs U_a and U_b represent the two sum signals and U_b_stör and U_a_stör the two Störsig ⁇ 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)
- Electric Propulsion And Braking For Vehicles (AREA)
- Pinball Game Machines (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007023475A DE102007023475B4 (en) | 2007-05-15 | 2007-05-15 | wheel sensor |
PCT/EP2008/055695 WO2008138858A1 (en) | 2007-05-15 | 2008-05-08 | Wheel sensor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2146886A1 true EP2146886A1 (en) | 2010-01-27 |
EP2146886B1 EP2146886B1 (en) | 2011-01-26 |
Family
ID=39712477
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08759473A Not-in-force EP2146886B1 (en) | 2007-05-15 | 2008-05-08 | Wheel sensor |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2146886B1 (en) |
AT (1) | ATE496812T1 (en) |
DE (2) | DE102007023475B4 (en) |
WO (1) | WO2008138858A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011081424A1 (en) * | 2011-08-23 | 2013-02-28 | Siemens Aktiengesellschaft | A method for detecting state changes in an arrangement and arrangement for detecting state changes |
CN103552581B (en) * | 2013-11-12 | 2016-01-13 | 哈尔滨理工大学 | Wheel sensor |
CN105329258B (en) * | 2015-11-20 | 2017-03-15 | 重庆微标科技股份有限公司 | It is applied to signal acquisition circuit, the apparatus and system of magnet steel on-line fault diagnosis |
PL229703B1 (en) | 2016-04-28 | 2018-08-31 | Bombardier Transp Zwus Polska Spolka Z Ograniczona Odpowiedzialnoscia | Integrated system of a sensor for detecting the presence of the rail vehicle wheel |
DE102016211354A1 (en) | 2016-06-24 | 2017-12-28 | Siemens Aktiengesellschaft | Transmitter device, sensor device and method for detecting a magnetic field change |
EP3916434B1 (en) * | 2020-05-27 | 2024-04-03 | Siemens Mobility GmbH | Wheel detector and method for detecting a track-bound wheel |
DE102021212809A1 (en) | 2021-11-15 | 2023-05-17 | Siemens Mobility GmbH | Sensor device and method for detecting a change in magnetic field |
DE102023103783B3 (en) | 2023-02-16 | 2024-03-28 | Scheidt & Bachmann Gmbh | Axle counter system for monitoring a track section of a rail system |
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 (en) * | 1983-01-28 | 1984-08-02 | Siemens AG, 1000 Berlin und 8000 München | Circuit arrangement for generating axle counting pulses for axle counting systems |
DD246090A1 (en) * | 1986-02-19 | 1987-05-27 | Werk F Signal Und Sicherungste | CIRCUIT ARRANGEMENT FOR GENERATING TORQUE-FREE, DIRECTIONAL SIGNALS IN AXLE EQUIPMENT |
DD246089A1 (en) * | 1986-02-19 | 1987-05-27 | Werk F Signal Und Sicherungste | CIRCUIT ARRANGEMENT FOR MONITORING AXLE EQUIPMENT |
DE4240478A1 (en) * | 1992-12-02 | 1994-06-09 | Sel Alcatel Ag | Axle counting and travel direction detection system at specific railway track point - has at least two sensors displaced relative to each other and fixed at one rail or two rails of track as well as one generator and two transmitters and two receivers |
DE19545234C2 (en) * | 1995-11-22 | 2001-12-13 | Siemens Ag | Device for detecting line interruptions in axle counting systems |
DE19638956A1 (en) * | 1996-09-12 | 1998-03-19 | Siemens Ag | Interface for multi-sectioned train-axle count arrangement |
AT406139B (en) * | 1998-04-08 | 2000-02-25 | Frauscher Josef | WHEEL SENSOR |
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 |
DE10123673A1 (en) * | 2001-05-16 | 2002-11-21 | Alcatel Sa | Inductive rail contact |
DE10137519A1 (en) * | 2001-07-30 | 2003-02-13 | Siemens Ag | Wheel sensor for a unit signaling a clear railway line has an inductive sensor on a railway line to detect a change in a magnetic field as the iron wheels of a railway vehicle pass over a rail |
ATE317788T1 (en) * | 2003-12-08 | 2006-03-15 | Cit Alcatel | METHOD FOR PHASE MODULATION OF AN ELECTRICAL AND ELECTROMAGNETIC SWITCHING CIRCUITS, PARTICULARLY FOR AXLE COUNTERS |
-
2007
- 2007-05-15 DE DE102007023475A patent/DE102007023475B4/en not_active Expired - Fee Related
-
2008
- 2008-05-08 EP EP08759473A patent/EP2146886B1/en not_active Not-in-force
- 2008-05-08 DE DE502008002480T patent/DE502008002480D1/en active Active
- 2008-05-08 AT AT08759473T patent/ATE496812T1/en active
- 2008-05-08 WO PCT/EP2008/055695 patent/WO2008138858A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2008138858A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE502008002480D1 (en) | 2011-03-10 |
DE102007023475A1 (en) | 2008-12-11 |
EP2146886B1 (en) | 2011-01-26 |
WO2008138858A1 (en) | 2008-11-20 |
ATE496812T1 (en) | 2011-02-15 |
DE102007023475B4 (en) | 2009-07-09 |
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