WO1999039959A1 - Vorrichtung zur flachstellenortung von wenigstens einem rollfähigen körper - Google Patents
Vorrichtung zur flachstellenortung von wenigstens einem rollfähigen körper Download PDFInfo
- Publication number
- WO1999039959A1 WO1999039959A1 PCT/DE1999/000309 DE9900309W WO9939959A1 WO 1999039959 A1 WO1999039959 A1 WO 1999039959A1 DE 9900309 W DE9900309 W DE 9900309W WO 9939959 A1 WO9939959 A1 WO 9939959A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor means
- support
- rail
- sensors
- flat
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/12—Measuring or surveying wheel-rims
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/28—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring contours or curvatures
- G01B7/282—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring contours or curvatures for measuring roundness
Definitions
- the invention relates to a device and a method for locating flat spots of at least one rollable body, in particular conductive wheels of in particular a rail vehicle.
- Each measuring section is isolated in the middle by radio frequency, which means that the rail is interrupted.
- this has the disadvantage that the wear on the rails and the wheels is increased at these interruptions and, in addition, shearing of the rail sections in the vicinity of the interruption cannot be completely prevented.
- the use of at least one resonant circuit has the disadvantage that increased precautions have to be taken in order to minimize or prevent a disturbance of the resonant circuit, such as, for example, by the traction current of electric traction vehicles.
- DE 21 19 146 B2 discloses a device for locating flat spots, with which flat spots on wheels of rail vehicles, for example, can be detected by means of three device variants.
- the first variant provides for tapping an impedance arranged in a resonant circuit, the object to be measured being part of this resonant circuit, and for amplifying and evaluating the tapped signal.
- Variant two provides, inter alia, a series connection of coils in which one coil is provided in series connection for each rail in the measuring range or one coil alone in the entire measuring range for both rails.
- Version three uses electrically conductive auxiliary rails. This document attempts to create a resonant circuit in the rails. The resonance should occur when a wheel is in the test section. If the wheels of the axle have flat spots, the wheel will fly while rolling over the flat spot if the train speed is sufficiently high. The wheel, which has a flat spot, loses contact with the rail. The signal level breaks down as the resonance state is canceled. 3
- this device only works properly if only one axis is arranged over the measuring section.
- the short circuit of a second axis is maintained in the test section, even if the wheels of another axis which is arranged in the test section have flat spots.
- the present invention has the object of specifying a device and a method for locating flat spots of at least one rollable body, which or with which a detection of flat spots on the at least one rollable body is reliably made possible.
- a further task is to carry out or enable this with as few components as possible and to avoid the abovementioned increased wear and the shifting of the rail sections against one another. It is also an object of the present invention to provide a flat location sensor means with which flat location detection is reliably made possible.
- a device for locating flat spots or for locating unbalances of at least one rollable body, in particular conductive wheels of in particular a rail vehicle, the at least one rollable body being arranged and movable on a support, in particular at least one rail, and wherein at least one sensor means is provided which detects in a measuring section on the support whether the at least one rollable body is in contact with the support, the sensor means having at least two sensors and the support in the measuring section on the support not in at least one direction 4 is interrupted and the sensors of a sensor means are arranged spaced along the support in the measuring section.
- support is to be interpreted in general; in particular, it comprises a rail, two or more rails and a track.
- the device according to the invention is preferably further developed in that electrical signals can be received by the sensor means. In this way, common electronic
- the sensor means advantageously has at least one induction coil as a sensor, it is particularly preferred to use sensors which can be arranged at a distance from a support or a rail. This also has the advantage that variations in a current flow in the vicinity of the induction coils can be measured directly.
- the rolling body is preferably a wheel that is electrically conductive, it is possible to send a current through the wheel.
- the support in particular the at least one rail, is preferably electrically conductive
- a current can flow from the rail and / or the support to the wheel or vice versa, provided the wheel touches the rail or the support, which is at least always the case , if there is no flat spot on the part of the circumference of the wheel that is closest to the support or rail.
- a voltage source which in particular provides a high-frequency voltage, is preferably provided for locating flat spots.
- a voltage source can also be a current source, in which case high-frequency current is then made available. 5
- two rollable bodies (such as wheels in particular) are advantageously arranged on one axle and these can each be moved on one of two rails, it is particularly advantageously possible to move from a flat spot on a rollable body to a flat spot on the other rollable body , which is arranged on the same axis.
- a particularly simple and comparatively inexpensive, preferred embodiment provides one sensor means with two sensors for each measuring section per rail.
- An adder is advantageously provided for each sensor means. For example, this can preferably add voltages of the two sensors of the sensor means. If the voltage source is preferably electrically connected to both rails in such a way that a current can flow over the rails, the rolling body and the axis, then a particularly simple evaluation of the measured values is possible.
- the sensors of a sensor means are preferably arranged at a distance of at least half a wheel circumference of a largest wheel to be detected in the vicinity of a rail. Preferably only one sensor means is necessary if the sensors of this sensor are arranged in the vicinity of the rail at a distance from at least one wheel circumference of a largest wheel to be detected.
- the sensor means preferably has three sensors in the vicinity of only one rail. This preferred embodiment provides a relatively inexpensive and fault-insensitive variant. 6
- connection points of the voltage source or the current source with the support in the case of at least two rails are preferably arranged as supports so that they lie exactly opposite one another, that is to say they are the smallest distance apart from one another in the case of parallel rails.
- the device is preferably designed in such a way that the measuring section can be divided into two regions and that the currents flowing through these regions can almost be compensated for by using adaptation impedances.
- the sensors are preferably arranged under the support and in particular under the rails. Furthermore, the sensors are preferably arranged perpendicular to the support or the direction of movement of the rolling bodies, i.e. in the case of coils as sensor means, the winding direction of the coils is perpendicular to the support.
- three sensors each are preferably provided in the regions of the measuring section just mentioned, with the distances between the respective sensors in particular preferably not being greater than half the circumference of a rollable body.
- a changeover switch is preferably provided which, depending on the diameter of the rollable body, in particular the diameter of the wheel, controls the sensors accordingly.
- a means for detecting the wheel diameter is preferably provided.
- the device described is preferably arranged twice in succession.
- a flat location sensor means for locating flat spots on at least one rollable body, in particular at least one wheel is made possible in that the sensor means has at least two induction coils as sensors and that an adder is provided.
- An AC / DC converter and / or rectifier is advantageously provided for the sensor means for each of the at least two coils.
- a method for locating flat spots of rollable bodies or of unbalance of rollable bodies, in particular conductive wheels is specified with the following method steps:
- first and second signals U1, U2; U3, U4 arranged in the measuring section and originating in the measuring section, wherein
- an approximate identity of the amounts of the first and second signals means that the rolling body is outside the measuring section
- a significantly larger amount of the first signal (U1; U2; U3) compared to the second signal (U2; U4) essentially without varying the ratio of the amounts means that there is none on the support due to the path covered by the measuring path Flat exists, and
- a significantly larger amount of the first signal (U1; U2; U3) compared to the second signal (U2; U4) can be assigned to a flat spot on the rolling body with a time-limited variation of this ratio.
- the length of the measuring section is preferably greater than or equal to the circumference of the largest body to be examined on flat spots. This measure determines for each wheelable body, in particular for each wheel to be measured, whether there are flat spots on the circumference. If necessary, the measuring section could still be doubled.
- the first and second signals are preferably electrical voltages.
- the so-called skin effect is used, after which the conduction of the current essentially takes place on the surface of the conductive material, and in this way, in particular, a more accurate detection of the flat spots is made possible. Furthermore, the method is thereby preferably less susceptible to faults.
- a circuit is preferably closed over the body and the support in such a way that the flowing current flows past only one of the at least two sensors of a sensor means. In this way, on the one hand, it can be clearly determined that the body is in the measuring section and, moreover, simple detection of flat spots is possible.
- the axis or the body which has a flat gradient can be found more quickly after evaluating the received measured values.
- a quantitative extent of the flat spot is preferably determined via the parameters speed of the body, duration of the disturbance and weight of the body on the support, then it can be decided after the evaluation without direct mechanical inspection or visual inspection of the operating personnel on the body whether the body needs to be replaced.
- the aforementioned methods preferably take place using two circuits, the circuits being given by the voltage source or the current source, the connection to the respective rails, the rails from this connection to a wheel located thereon, the axle, the second wheel 9 of the axis and the section of the rail between the latter wheel and the connection of the cable to the voltage or current source.
- the running surfaces of the respective wheels with their respective axes, which are adjacent preferably form a parallel short circuit, as long as no flat spot comes in the immediate vicinity of the support.
- FIG. 1 shows an embodiment of a device for locating flat spots according to the invention
- Fig. 3 shows a third variant of the device according to the invention.
- FIG. 4 shows a fourth variant of the device according to the invention.
- FIG. 1 shows a device for locating flat spots on conductive wheels which are arranged on axles of, for example, a rail vehicle.
- the rails are identified by the reference number 1. 10
- Induction coils 2 are arranged near the rails.
- a high-frequency voltage source 3 which in this exemplary embodiment provides a high-frequency square-wave voltage, is electrically connected to the rails 1.
- the measuring path comprises a length from essentially the induction coil 2 arranged on the left to the induction coil 2 arranged on the far right. For the exemplary embodiment in FIG. 1, this measuring path is preferably smaller and larger than twice the center distance of the vehicles to be recorded or equal to the circumference of the largest wheel to be detected.
- the induction coils are grounded on one side and connected to a rectifier 4 on the other side.
- the connections of the induction coils 2 are selected such that the rectified voltages U1 and U2 or U3 and U4 for the
- Ua or Ub is essentially zero. If a rail vehicle with an axle on which two wheels are attached, enter the measuring range, i.e. are located between the first two induction coils 2, a short circuit is generated across the voltage source, part of the rails, the wheels and the axle. In this position, a maximum induction voltage is induced in the second coil, while a minimum induction voltage is induced in the first coil. This means that U2 is much larger than Ul and therefore Ua is approximately U2.
- This special arrangement of two induction coils arranged on one rail 1 and two induction coils arranged on the other rail 1 is selected in order to obtain a relatively symmetrical structure in terms of measurement technology.
- the determined values can thus be sent to the places where the wheels with flat spots or the corresponding wagons can be sorted out accordingly.
- the adder gain is, for example, 1.
- FIG. 2 A somewhat more asymmetrical but nevertheless practicable embodiment is shown in FIG. 2.
- only two induction coils are arranged on a rail. If the distance between these two coils is greater than half the circumference of the largest wheel to be detected, all flat areas of a wheel can also be detected.
- this embodiment has the advantage that fewer components are required.
- the evaluation itself is somewhat more complicated, since malfunctions due to the division of two short circuits and one short circuit within the section of the rails between the coils and one to the right of them could also overlap.
- FIG. 3 The disadvantages of the embodiments shown in FIG. 2 are essentially avoided by the embodiment of FIG. 3.
- three sensors are arranged on a rail, which in this exemplary embodiment are induction coils.
- the switch 6 After driving through the first section of an axle with two wheels located thereon, the switch 6 is switched from the right position to the left position when driving through the area of the central induction coil 2. In this way, the corresponding disturbances are avoided by a second short circuit and, at the same time, a fourth induction coil is saved.
- a comprehensive control of the railway network is required.
- a network of devices according to the invention is to be set up. Locations for such devices and systems are entrances to large marshalling yards, entrances to border stations and entrances to main lines at junctions. The distance to the train station should be chosen so that after the damage has been reported, the operational monitoring department has enough time to prepare the necessary measures.
- AC power source 3 conducts a current I to the rails 1.
- This current I is divided into currents Ix and Iy. These are compared in FIG. 4 by matching impedances 12 and 34. Instead of the matching impedances, capacitors could preferably also be used. Arranged on the rails are two adjacent axes 20 and 23, on which wheels 21, 22 and 24 and 25 are attached. Wheel 22 is between the 13
- Sensors 13 and 14 and wheel 24 are located between sensors 17 and 18.
- the sensors 13, 14, 15 and 17, 18 and 19 are in particular coils and are preferably arranged under the rails 1. Furthermore, the sensors are preferably arranged perpendicular to the rails, as shown in FIG. 4. Depending on the detected wheel circumference, flat spots or imbalances of the wheels are now measured in a measuring section between the sensors 13 and 19, or, if the wheel circumference is sufficiently small, between the sensors 14 and 18. For this purpose, a switch 32 and a are used for switching Switch 33 related.
- the voltages or induced voltages obtained via the sensors 13, 14, 15 or 17, 18, 19 are given as output voltages 28, 29 or 30, 31 to the further electronic equipment.
- the connections of the power source 3 were made vertically opposite on the rails 1.
- the preferred speed of the rail vehicles for measurement is between 60 and 120 km / h. It is also preferably provided to measure flat spots or imbalance of wheels in a speed range between 40 km / h and 250 km / h.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19980174T DE19980174D2 (de) | 1998-02-05 | 1999-02-05 | Vorrichtung zur Flachstellenortung von wenigstens einem rollfähigen Körper |
EP99915457A EP1060098A1 (de) | 1998-02-05 | 1999-02-05 | Vorrichtung zur flachstellenortung von wenigstens einem rollfähigen körper |
AU34062/99A AU3406299A (en) | 1998-02-05 | 1999-02-05 | Device for detecting flats on at least one body capable of rolling |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19804566.2 | 1998-02-05 | ||
DE1998104566 DE19804566C2 (de) | 1998-02-05 | 1998-02-05 | Vorrichtung und Verfahren zur Flachstellenortung von wenigstens einem rollfähigen Körper |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999039959A1 true WO1999039959A1 (de) | 1999-08-12 |
Family
ID=7856739
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/000309 WO1999039959A1 (de) | 1998-02-05 | 1999-02-05 | Vorrichtung zur flachstellenortung von wenigstens einem rollfähigen körper |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1060098A1 (de) |
AU (1) | AU3406299A (de) |
DE (2) | DE19804566C2 (de) |
WO (1) | WO1999039959A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10305470A1 (de) * | 2003-02-13 | 2004-08-26 | Schenck Process Gmbh | Meßstrecke zur Erfassung unterschiedlicher physikalischer Größen schienengebundener Fahrzeuge |
FR2893900B1 (fr) * | 2005-11-29 | 2008-05-23 | Signal Dev Sarl | Procede et dispositif de detection de defauts de circularite de roues de materiel ferroviaire et systeme comprenant un tel dispositif |
DE102006015924B4 (de) * | 2006-04-05 | 2008-04-17 | Schenck Process Gmbh | Meßstrecke an einer Schiene |
DE102015206636B4 (de) | 2015-04-14 | 2019-01-10 | Robert Bosch Gmbh | Verfahren zum Bereitstellen von Daten für eine Bremsplattenerkennung von Schienenfahrzeugen |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2119146B2 (de) | 1970-04-22 | 1975-10-30 | Telefonaktiebolaget Lm Ericsson, Stockholm | Verfahren und Anordnung zum Ermitteln von Flachstellen in der Lauffläche der Räder von Schienenfahrzeugen |
US4058279A (en) * | 1976-11-29 | 1977-11-15 | General Signal Corporation | Flat wheel detector |
WO1987006203A1 (en) * | 1986-04-16 | 1987-10-22 | O^/Degaard & Danneskiold-Samso^/E Aps | Apparatus for track-based detection of holes and flat spots in railway wheels |
-
1998
- 1998-02-05 DE DE1998104566 patent/DE19804566C2/de not_active Expired - Fee Related
-
1999
- 1999-02-05 WO PCT/DE1999/000309 patent/WO1999039959A1/de not_active Application Discontinuation
- 1999-02-05 EP EP99915457A patent/EP1060098A1/de not_active Withdrawn
- 1999-02-05 DE DE19980174T patent/DE19980174D2/de not_active Ceased
- 1999-02-05 AU AU34062/99A patent/AU3406299A/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2119146B2 (de) | 1970-04-22 | 1975-10-30 | Telefonaktiebolaget Lm Ericsson, Stockholm | Verfahren und Anordnung zum Ermitteln von Flachstellen in der Lauffläche der Räder von Schienenfahrzeugen |
US4058279A (en) * | 1976-11-29 | 1977-11-15 | General Signal Corporation | Flat wheel detector |
WO1987006203A1 (en) * | 1986-04-16 | 1987-10-22 | O^/Degaard & Danneskiold-Samso^/E Aps | Apparatus for track-based detection of holes and flat spots in railway wheels |
Non-Patent Citations (1)
Title |
---|
PAUL M ARNOCZKY: ""Flachstellenortung quo vadis?", Periodica Polytechnica, Transportation Engineering", vol. 22, no. 3-4, 1994, pages 129-152 |
Also Published As
Publication number | Publication date |
---|---|
DE19804566A1 (de) | 1999-08-19 |
DE19980174D2 (de) | 2001-02-15 |
EP1060098A1 (de) | 2000-12-20 |
AU3406299A (en) | 1999-08-23 |
DE19804566C2 (de) | 2002-01-31 |
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