EP1288098B1 - Radsensor und Anordnung - Google Patents

Radsensor und Anordnung Download PDF

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Publication number
EP1288098B1
EP1288098B1 EP02090264A EP02090264A EP1288098B1 EP 1288098 B1 EP1288098 B1 EP 1288098B1 EP 02090264 A EP02090264 A EP 02090264A EP 02090264 A EP02090264 A EP 02090264A EP 1288098 B1 EP1288098 B1 EP 1288098B1
Authority
EP
European Patent Office
Prior art keywords
coils
coil
track
wheel
wheel sensor
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.)
Expired - Lifetime
Application number
EP02090264A
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German (de)
English (en)
French (fr)
Other versions
EP1288098A1 (de
Inventor
Harald Schmidt
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
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Siemens AG
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Publication date
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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
    • B61L1/163—Detection devices
    • B61L1/165—Electrical

Definitions

  • the invention relates to a wheel sensor according to the preamble of claims 1 and 3 and a Radsensoran Aunt according to the preamble of claims 8 and 10. Radsensoren be used in railways for the track vacancy, but also for other switching and reporting tasks.
  • the magnetic field influencing effect of the iron wheels of rail vehicles is predominantly utilized.
  • the retroactivity of the iron wheels can be detected, whereby a wheel pulse is registered with each wheel detection or axle detection.
  • the number of wheel pulses in conjunction with another wheel sensor provides information about the occupancy state of the intermediate track section.
  • This track vacancy is an essential decision criterion for the control of switches and signals.
  • ICE Intercity Express
  • a coil arrangement with a magnetic core is provided. Two coils arranged concentrically to one another are connected in such a way that opposing magnetic fields arise when the current flows together.
  • a magnetic interference field induces interference voltages in both coils, which compensate each other because of the opposing wiring of the two coils.
  • the coil arrangement is part of an inductive sensor for generating a working magnetic field is maintained. The iron mass of a traveling wheel changes the properties of the working magnetic field, which is sensed.
  • a very strong interference magnetic field such as an excited eddy current brake, the coil core so can magnetize that an undesirable response of the sensor is caused.
  • a similar, but coreless coil assembly is from the DE-A1-199 15 597 known.
  • the sensitivity of this generic axle counter is low, since the magnetic field generated for the detection of the wheel does not optimally penetrate the area of the wheel flange of the wheel.
  • wetness on the sensor housing may result in a further reduction in sensor sensitivity at the usually high operating frequencies of coreless coil assemblies.
  • the invention has for its object to overcome these disadvantages and to provide a wheel sensor with inductive sensor whose parameters are optimized in terms of sensitivity and thus in terms of the reliability of the overall system.
  • an optimization is achieved in that the inner coil has an area ratio corresponding to the higher number of turns than the outer coil. In this way, not only a partial compensation of the same, but a complete compensation is achieved in homogeneous interference fields.
  • the special coil dimensioning also has the consequence that the induction occurring in opposite directions when driving in both coils are not the same size and consequently a sufficiently high total induction remains for the detection of a wheel. Since disturbing effects are virtually completely eliminated and the working magnetic field has a very high field strength and optimally passes through the wheel flange of the wheel to be detected Compared to the prior art, a significant improvement in the sensitivity of the sensor and thus increasing the reliability of the overall system.
  • the second coil is preferably arranged centrally within the first coil according to claim 2.
  • the compensation effect is also present when the inner coil is arranged eccentrically.
  • the coil shapes can be very different.
  • the inner coil may have circular turns and be arranged eccentrically within an oval shaped outer coil.
  • Claim 3 characterizes a further solution of the task, wherein in addition to the solution according to claim 1, a simplification is achieved. Coils of different geometry and different number of turns are not required in this alternative solution. Instead, an overlapping in the vertical projection arrangement of similar coils is provided, the winding planes are arranged quasi one above the other. Since the coils are not interdigitated or interpenetrated, the magnetic field generated by one coil passes through the other coil in equal parts with opposing inner and outer magnetic fluxes, that is, the coils are magnetically decoupled from each other.
  • the coils are preferably designed according to claim 4 as a very flat, spirally wound disc coils. In this way, the coils can be easily installed in the housing of a wheel sensor.
  • the winding planes of the coils in both alternative solutions can run parallel to the track plane.
  • both coils are tilted at the same inclination angle to a horizontal surface in the track direction. Magnetic interference fields then pass through both coils in the same intensity and direction and thus cancel each other, even if the field is not parallel to the coil longitudinal axes.
  • two wheel sensors are arranged one behind the other. In this way, the direction of travel of a rail vehicle passing over the two wheel sensors can be determined on the basis of the time interval of the wheel pulse registration.
  • roof-shaped inclined winding planes of the coil pairs are provided.
  • Claim 10 characterizes a Doppelradsensoran extract in which also overlap the adjacent coils of the two wheel sensors.
  • the magnetic decoupling according to claim 3 also has an effect in this area.
  • the advantage of this arrangement is that the geometric overlapping of the wheel sensors has a longer overlapping phase of the influence exerted by a wheel on both sensors.
  • FIG. 1 schematically illustrates the operation of an inductive sensor with interference field compensation according to the prior art.
  • the sensor consists essentially of an oscillator 1 and a resonant circuit 2 with a capacitor C and two coils L1 and L2.
  • the two coils L1 and L2 in the LC resonant circuit 2 are connected in such a way that the interference voltages U StörL1 and U StörL2 are opposite in direction for the same absolute value and thus cancel each other out.
  • a voltage applied by the oscillator 1 to the LC resonant circuit 2 working voltage U oszL1 or U oszL2 for generating a working magnetic field is hardly affected by this arrangement.
  • FIG. 2 shows a track body 3 in perspective view with a first embodiment of a coil arrangement according to the invention for interference magnetic field compensation. It is seen that a noise magnetic field ⁇ s of a rail current I s is generated.
  • the two coils L1 and L2 connected in series are formed as inner coil Li and outer coil La, wherein the winding orientations of the two coils Li and La are opposite to each other, like the FIGS. 3a and 4 show symbolized by arrows.
  • the number of turns n Li of the inner coil Li is greater than the number of turns n La of the outer coil La.
  • the compensation effect is present even if, as in FIG. 4 , the inner coil Li is not arranged centrically in the outer coil La.
  • the coils Li and La can be of almost any shape, such as circular, square, rectangular or oval.
  • exact compliance with the above-mentioned dimensioning rule, namely the reverse proportionality of the number of turns to the coil surfaces an almost complete compensation of disturbing homogeneous magnetic fields can be achieved.
  • differences between the interference voltages of the coils Li and La can occur as a result of the different coil dimensions.
  • the effectively remaining total noise voltage is always smaller than that of a single coil, so that at least partially compensating effect is guaranteed.
  • FIGS. 5 to 10 refer to a further embodiment according to the invention of an interference field compensating coil arrangement. Opposite in the FIGS. 2 to 4 illustrated variant, this embodiment differs in particular in that the coils used L1 and L2, in contrast to the coils Li and La have similar geometry. This results in a reduction of the effort or costs.
  • FIG. 5 shows in an analogous representation FIG. 2 in that two mutually offset and partially overlapping coils L1 and L2 of the same geometry and number of turns are provided. Since both coils L1 and L2 are identical, the disturbance magnetic field ⁇ s induces in both coils L1 and L2 the same interference voltage U StörL1 and U StörL2 ( FIG. 1 ). For compensation, the coils L1 and L2, as for FIG. 1 executed, interconnected.
  • Each coil L1 and L2 generates a magnetic field as a single coil, since the magnetic decoupling no mutual interference occurs. Therefore, it has no influence that the magnetic fields B L1 and B L2 of both coils L1 and L2 are directed in oscillator operation. Both coils L1 and L2 contribute in equal parts to the detection of a wheel, because their magnetic fields B L1 and B L2 from the flange 4 ( FIG. 8 ) of a wheel are influenced in the same way. Compared to an arrangement with only one sensor coil, that is, without including this single coil in a coil majority for interference field compensation, the Einwirk Scheme of the wheel extends approximately to the lateral offset X of the two coils L1 and L2.
  • FIG. 8 shows the coils L1_1, L2_1 and L2_2 two wheel sensors relative to the track body 3.
  • the coils L1_1, L2_1 and L2_2 and L1_2 are such, for example, within a sensor housing, mounted so that their centers have a constant height to the horizontal base surface of the track body 3 , wherein the winding planes are inclined to the track plane.
  • Magnetic interference fields then pass through the two coils L1_1 and L2_1 or L2_2 and L1_2 in the same intensity and direction and thus cancel each other, even if the Interference field is not parallel to the coil longitudinal axes.
  • the in FIG. 8 shown double sensor is run over by the wheel flange 4 of the wheel in a specific time sequence, so that it can be concluded from the signal sequence on the direction of travel of the rail vehicle.
  • FIG. 9 a preferred coil form for wheel sensors is shown.
  • the coils L1 and L2 are disc-shaped and wound in spirals.
  • the height of the disk coils corresponds to the diameter of the winding wire and is therefore so small that the two overlapping coils L1 and L2 can be installed without inclination in the housing of a wheel sensor.
  • FIG. 10 illustrates a dual sensor with disk coils L1_Sys1 and L2_Sys1 and L1_Sys1 and L2_Sys2, with the adjacent coils L2_Sys1 and L1_Sys2 of the two sensor systems overlap Sys1 and Sys2

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measuring Fluid Pressure (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Vehicle Body Suspensions (AREA)
  • Pinball Game Machines (AREA)
EP02090264A 2001-07-30 2002-07-17 Radsensor und Anordnung Expired - Lifetime EP1288098B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10137519A DE10137519A1 (de) 2001-07-30 2001-07-30 Radsensor
DE10137519 2001-07-30

Publications (2)

Publication Number Publication Date
EP1288098A1 EP1288098A1 (de) 2003-03-05
EP1288098B1 true EP1288098B1 (de) 2008-12-31

Family

ID=7693880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02090264A Expired - Lifetime EP1288098B1 (de) 2001-07-30 2002-07-17 Radsensor und Anordnung

Country Status (6)

Country Link
EP (1) EP1288098B1 (da)
AT (1) ATE419158T1 (da)
DE (2) DE10137519A1 (da)
DK (1) DK1288098T3 (da)
ES (1) ES2316521T3 (da)
PT (1) PT1288098E (da)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602005025359D1 (de) * 2004-07-16 2011-01-27 Lynxrail Corp Gerät zur bestimmung von schwankbewegung und anstellwinkel eines schienenfahrzeugradsatzes
DE102005023726B4 (de) * 2005-05-23 2007-11-22 Frauscher Gmbh Verfahren und Vorrichtung zur Vermeidung von ungewollten Beeinflussungen von Doppelsensoren
DE102007023475B4 (de) 2007-05-15 2009-07-09 Siemens Ag Radsensor
DE102007023476B4 (de) 2007-05-15 2009-07-09 Siemens Ag Radsensor
DE102008056481A1 (de) 2008-11-05 2010-05-06 Siemens Aktiengesellschaft Radsensor
DE102009007068A1 (de) 2009-01-29 2010-08-12 Siemens Aktiengesellschaft Radsensor
DE102009053257B4 (de) * 2009-11-05 2013-10-02 Siemens Aktiengesellschaft Radsensor
DE102012212939A1 (de) 2012-07-24 2014-01-30 Siemens Aktiengesellschaft Radsensor
DE102017220281A1 (de) 2017-11-14 2019-05-16 Siemens Aktiengesellschaft Sensoreinrichtung
DE102018111448A1 (de) 2018-05-14 2019-11-14 PINTSCH TIEFENBACH GmbH Sensor zum Erfassen von Metallteilen, sowie Verfahren zum Abschwächen eines magnetischen Feldes
DE102018111454A1 (de) * 2018-05-14 2019-11-14 PINTSCH TIEFENBACH GmbH Sensor zum Erfassen von Metallteilen, sowie Verfahren zum Abschwächen eines magnetischen Feldes
DE102021212809A1 (de) 2021-11-15 2023-05-17 Siemens Mobility GmbH Sensoreinrichtung und Verfahren zum Erfassen einer Magnetfeldänderung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882374A (en) * 1974-04-18 1975-05-06 Us Army Transmitting-receiving coil configuration
DD261004A1 (de) * 1987-06-25 1988-10-12 Deutsche Reichsbahn Magnetostatischer impulsgeber
DE3842882A1 (de) * 1988-12-20 1990-06-21 Knorr Bremse Ag Verfahren und anordnung zur unterdrueckung des stoereinflusses magnetischer bremsen auf magnetische achszaehler
DE19709844A1 (de) * 1997-02-28 1998-09-03 Siemens Ag Sensor, insbesondere Radsensor
AT406139B (de) * 1998-04-08 2000-02-25 Frauscher Josef Radsensor

Also Published As

Publication number Publication date
ES2316521T3 (es) 2009-04-16
PT1288098E (pt) 2009-02-02
DE10137519A1 (de) 2003-02-13
DE50213159D1 (de) 2009-02-12
DK1288098T3 (da) 2009-04-20
EP1288098A1 (de) 2003-03-05
ATE419158T1 (de) 2009-01-15

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