EP1547898B1 - Device for guiding eddy current sensors along railway tracks for a non destructive inspection of the rail surface - Google Patents
Device for guiding eddy current sensors along railway tracks for a non destructive inspection of the rail surface Download PDFInfo
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- EP1547898B1 EP1547898B1 EP04090504A EP04090504A EP1547898B1 EP 1547898 B1 EP1547898 B1 EP 1547898B1 EP 04090504 A EP04090504 A EP 04090504A EP 04090504 A EP04090504 A EP 04090504A EP 1547898 B1 EP1547898 B1 EP 1547898B1
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- 230000001066 destructive effect Effects 0.000 title claims description 3
- 238000007689 inspection Methods 0.000 title claims 3
- 230000005291 magnetic effect Effects 0.000 claims abstract description 8
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 2
- 230000005294 ferromagnetic effect Effects 0.000 claims description 2
- 230000001939 inductive effect Effects 0.000 abstract description 4
- 238000009659 non-destructive testing Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000011664 signaling Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 230000001609 comparable effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Classifications
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- 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
- B61K9/08—Measuring installations for surveying permanent way
Definitions
- the invention relates to a device according to the preamble of claim 1.
- the task of the eddy current testing technique is to test those surface areas which are exposed to rolling contact between the wheel and the rail. These areas are referred to as the driving mirror and driving edge. Driving edge and driving mirrors are subject during operation of rolling contact fatigue, as a result of which crack-like damage can occur.
- a prerequisite for the success of the eddy current test is that one or more sensors are guided at a constant distance over the areas of the rail in question. This task has been solved with sensor carriers, which consist of a 90 ° -Winkelblech with a roller guide.
- Track free signaling devices are mainly used to secure sections and level crossings.
- the test vehicle does not leave the tested route properly.
- the route remains blocked for other vehicles (so-called "red illumination") until the fault is removed from the signal box. This results in delays for the subsequent rail vehicles with all known consequences.
- the carrier is at least partially made of ferromagnetic material and is simulated in terms of its magnetic or magnetic inductive effect on track switching means a standard wheel of a rail vehicle, it is ensured that a test vehicle always causes unique switching operations in the Gleisokomelde wornen so that false reports on the Busy condition of a track section can be avoided.
- the replica can advantageously take place in that the carrier is a roller mounted on a ferromagnetic, a developed portion of a wheel with flange and wheel arch representing plate.
- the eddy current sensors are kept independent of the rail wear at a constant distance from the rail running edge and the Schienenfahrapt.
- a weakness of the previously used sensor carrier is eliminated, which could not sufficiently adapt to the various wear profiles encountered.
- the sensitivity was unduly reduced and the section in question had to be classified as unaudited.
- the heavily worn areas are particularly susceptible to cracking due to the heavy use.
- the eddy current sensors are interchangeably held in arranged on the support mounting blocks, which recommends to form the support resilient so that in an undesirable collision, for example, with the rail body, the sensors recede and thus can be protected from damage.
- the plate is supported by two in the rail longitudinally arranged roller pairs, preferably the rollers of a pair of rollers are arranged transversely to the rail longitudinal direction side by side and their axes of rotation have different angles with respect to the horizontal.
- FIG. 1A shows in cross-section the situation in which a wheel 2 rolling on a rail 1 is completely recognized by an inductive axle counter system 3.
- the wheel 2 rolls over the rail 1 and influences the course of the emanating from the electromagnet 3a field lines 4 such that in the receiver coil 3b of the axle or wheel sensor, an induction voltage is caused, which leads to a triggering of the axle or wheel recognition.
- FIG. 1B shows in cross-section the situation in which a test device according to an exemplary embodiment of the invention rolls along the rail 1 and is recognized by the inductive axle counter system 3.
- Made of ferromagnetic material existing support plate 5 influences the field line course 4 in the same way as the wheel 2.
- the test device 5 thus causes as well as a wheel unique switching states in the track-free reporting device, so that they can work smoothly.
- Fig. 2 shows the cross-sectional profile of the support plate 5 of the test apparatus and one of the two support plate 5 supporting roller pairs 6, 6.
- the mutually at an angle extending axes of rotation of the rollers 6, 6 are connected at their ends facing each other with a bearing block 7, the Support plate 5 carries.
- force 10 By acting on the pair of rollers 6, 6 directed towards the rail 1 force 10 ensures that the rollers 6, 6 regardless of the extent of wear of the rail 1 always tangent to the surface and thus always a constant distance between the support plate 5 and the rail surface is maintained.
- the inclination and the distance between the two rollers 6, 6 is adjusted so that one roller is in constant contact with the running edge 8 and the other roller is in constant contact with the driving mirror 9.
- FIG. 3 shows a roller pair 6, 6 running over a severely worn rail 1 of the UIC 60 type.
- the support plate 5 is designed such that no contact with the protrusion 11 resulting from the wear-caused material removal occurs, even with high wear.
- Fig. 4 shows the entire testing device according to an embodiment of the invention in two perspective views.
- the upper view shows the device viewed from above and the lower view shows the device viewed from below.
- the support plate 5 is provided at its front and rear ends with two adjacent apertures for the passage of the rollers 6. Between the two pairs of rollers 6, 6 are several, in the present example, four mounting blocks 13 for receiving a respective eddy current sensor.
- the mounting blocks 13 are formed so that the eddy current sensors 12 can be replaced quickly, for example, if damaged.
- the mounting blocks 13 each form an individual bracket for the eddy current sensors 12 with respect to the support plate 5.
- the angles are selected so that the rail 1 facing lower surfaces 14 of projecting through holes in the support plate 5 eddy current sensors 12 each tangential to the opposite surface region of curved track 1 run.
- the two roller pairs 6, 6 provide for the constant distance between the surfaces 14 of the eddy current sensors 12 and the rail surface.
- the mounting blocks 13 include a spring mechanism that biases the eddy current sensors 12 toward the rail 1 and holds it in position. As a result, the eddy current sensors 12 can recede in the event of an undesired collision with a hard object and thus be protected from damage.
- the device shown in Fig. 4 may be mounted on a Schienenprüfzug or Schienenschleifzug and be carried along with this along the track. However, it can also be attached to a manually operable chassis or a trolley to be moved by them along the rails.
- the holding device for the attachment of the device, ie the storage of the roller pairs 6, 6 in such a way that they are in constant contact with the rail surface are on the train or chassis is not shown.
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- Mechanical Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to a device according to the preamble of
Es ist Stand der Technik, dass Gleise im Rahmen der wiederkehrenden Betriebsüberwachung mit zerstörungsfreiem Prüfverfahren auf Schäden geprüft werden. Hierzu werden sowohl Schienenprüfzüge als auch - im begrenzten Umfange - handgeführte Prüfvorrichtungen eingesetzt. Als zerstörungsfreie Prüfverfahren kamen bisher die Ultraschalltechnik und neuerdings auch die Wirbelstromprüftechnik zum Einsatz. Mit der Ultraschalltechnik werden Materialtrennungen im Inneren der Schiene erfasste. Inhomogenitäten und Trennungen im Oberflächenbereich, wie z.B. Head Checks, Squats und Belgrospi's werden mit der Ultraschalltechnik jedoch nicht erfasst. Hierzu wird, wie in der WO 01/90738 A2 beschrieben ist, neuerdings die Wirbelstromprüftechnik sehr erfolgreich eingesetzt. Aufgabe der Wirbelstromprüftechnik ist es, diejenigen Oberflächenbereiche zu prüfen, welche dem Rollkontakt zwischen Rad und Schiene ausgesetzt sind. Diese Bereiche werden als Fahrspiegel und Fahrkante bezeichnet. Fahrkante und Fahrspiegel unterliegen im Betrieb der Rollkontaktermüdung, infolge derer rissartige Schädigungen entstehend können. Voraussetzung für das Gelingen der Wirbelstromprüfung ist, dass ein oder mehrere Sensoren in einem konstanten Abstand über die infrage kommenden Bereiche der Schiene geführt werden. Diese Aufgabe wurde bisher mit Sensorträgern gelöst, die aus einem 90°-Winkelblech mit einer Rollenführung bestehen.It is state of the art that tracks are checked for damage in the context of the recurrent operation monitoring with non-destructive testing method. For this purpose, both rail test trains and - to a limited extent - hand-held test devices are used. The non-destructive test methods hitherto used were ultrasound technology and, more recently, eddy current testing technology. Ultrasonic technology detects material separations inside the rail. However, inhomogeneities and separations in the surface area, such as head checks, squats and Belgrospi's are not detected with the ultrasound technique. For this purpose, as in the WO 01/90738 A2, recently the eddy current testing technique has been used very successfully. The task of the eddy current testing technique is to test those surface areas which are exposed to rolling contact between the wheel and the rail. These areas are referred to as the driving mirror and driving edge. Driving edge and driving mirrors are subject during operation of rolling contact fatigue, as a result of which crack-like damage can occur. A prerequisite for the success of the eddy current test is that one or more sensors are guided at a constant distance over the areas of the rail in question. This task has been solved with sensor carriers, which consist of a 90 ° -Winkelblech with a roller guide.
Das Problem der Anordnungen dieser Bauart besteht darin, dass die heute üblichen Gleisfreimeldeeinrichtungen mit Schaltmitteln basierend auf dem magnetischen oder magnetinduktiven Prinzip gestört werden können. Gleisfreimeldeeinrichtungen dienen hauptsächlich zur Sicherung von Streckenabschnitten und Bahnübergängen. In dem Fall, dass in den Gleichfreimeldeeinrichtungen bei der Erkennung von Rädern bzw. Achsen eine Störung auftritt, verlässt das Prüffahrzeug die geprüfte Strecke nicht ordnungsgemäß. Die Strecke bleibt für weitere Fahrzeuge gesperrt (so genannte "Rotausleuchtung") bis die Störung vom Stellwerk aufgehoben wird. Hierdurch entstehen Verspätungen für die nachfolgenden Schienenfahrzeuge mit allen bekannten Konsequenzen.The problem with the arrangements of this type is that the track-free signaling devices customary today can be disturbed by switching means based on the magnetic or magnetic-inductive principle. Track free signaling devices are mainly used to secure sections and level crossings. In the event that a fault occurs in the DC lock in the detection of wheels or axles, the test vehicle does not leave the tested route properly. The route remains blocked for other vehicles (so-called "red illumination") until the fault is removed from the signal box. This results in delays for the subsequent rail vehicles with all known consequences.
Es ist die Aufgabe der vorliegenden Erfindung, eine Vorrichtung zur geführten Bewegung von Wirbelstromsensoren entlang Eisenbahnschienen zum Zwecke der zerstörungsfreien Prüfung von deren Oberflächen, wobei die Wirbelstromsensoren an einem Träger befestigt sind und dieser auf den Schienen gleitet oder mittels Rollen entlang diesen geführt wird, zu schaffen, die in den Gleisfreimeldeeinrichtungen mit Schaltmitteln basierend auf dem magnetischen oder magnetinduktiven Prinzip stets eindeutige und störungsfreie Zustände erzeugt.It is the object of the present invention to provide a device for the guided movement of eddy current sensors along railway tracks for the purpose of nondestructive testing of their surfaces, wherein the eddy current sensors are mounted on a carrier and this slides on the rails or is guided by rollers along them, which always produces clear and trouble-free conditions in the track-free reporting devices with switching means based on the magnetic or magnetic induction principle.
Diese Aufgabe wird erfindungsgemäß gelöst durch eine Vorrichtung mit den Merkmalen des Anspruchs 1. Vorteilhafte Weiterbildungen dieser Vorrichtung ergeben sich aus den Unteransprüchen.This object is achieved by a device having the features of
Dadurch, dass der Träger zumindest teilweise aus ferromagnetischem Material besteht und in Bezug auf seine magnetische oder magnetinduktive Wirkung auf Gleisschaltmittel einem Standard-Rad eines Schienenfahrzeugs nachgebildet ist, ist sichergestellt, dass ein Prüffahrzeug stets eindeutige Schaltvorgänge in den Gleisfreimeldeeinrichtungen bewirkt, so dass Fehlmeldungen über den Besetztzustand eines Gleisabschnitts vermieden werden.The fact that the carrier is at least partially made of ferromagnetic material and is simulated in terms of its magnetic or magnetic inductive effect on track switching means a standard wheel of a rail vehicle, it is ensured that a test vehicle always causes unique switching operations in the Gleisfreimeldeeinrichtungen so that false reports on the Busy condition of a track section can be avoided.
Die Nachbildung kann vorteilhaft dadurch erfolgen, dass der Träger eine auf Rollen gelagerte ferromagnetische, einen abgewickelten Teilbereich eines Rades mit Spurkranz und Radlauf darstellende Platte ist.The replica can advantageously take place in that the carrier is a roller mounted on a ferromagnetic, a developed portion of a wheel with flange and wheel arch representing plate.
Bei einer vorteilhaften Ausbildung der Vorrichtung sind die Wirbelstromsensoren unabhängig vom Schienenverschleiß in konstantem Abstand von der Schienenfahrkante und dem Schienenfahrspiegel gehalten. Hierdurch wird eine Schwäche der bisher eingesetzten Sensorträger beseitigt, welche sich den verschiedenen anzutreffenden Verschleißprofilen nicht ausreichend anpassen konnten. Hierdurch bestand die Gefahr, dass der zulässige Abstandsbereich zwischen den Sensoren und der Schienenoberfläche überschritten wurde. Als Folge wurde die Prüfempfindlichkeit unzulässig herabgesetzt und der betreffende Abschnitt musste als ungeprüft eingestuft werden. Gerade die stark verschlissenen Bereiche sind jedoch wegen der starken Beanspruchung besonders rissgefährdet.In an advantageous embodiment of the device, the eddy current sensors are kept independent of the rail wear at a constant distance from the rail running edge and the Schienenfahrspiegel. As a result, a weakness of the previously used sensor carrier is eliminated, which could not sufficiently adapt to the various wear profiles encountered. There was a risk that the permissible distance between the sensors and the rail surface has been exceeded. As a result, the sensitivity was unduly reduced and the section in question had to be classified as unaudited. Especially the heavily worn areas are particularly susceptible to cracking due to the heavy use.
Aus diesem Grunde ist es ein erheblicher Vorteil, wenn die Wirbelstromsensoren so geführt werden, dass sie ungeachtet des Verschleißzustandes der Schienen einen stets konstanten Abstand zu diesen haben.For this reason, it is a significant advantage if the eddy current sensors are guided so that they always have a constant distance to them irrespective of the state of wear of the rails.
Zweckmäßig sind die Wirbelstromsensoren auswechselbar in auf dem Träger angeordneten Montageblöcken gehalten, wobei sich empfiehlt, die Halterung federnd auszubilden, so dass bei einer unerwünschten Kollision beispielsweise mit dem Schienenkörper die Sensoren zurückweichen und hierdurch vor Beschädigungen geschützt werden können.Suitably, the eddy current sensors are interchangeably held in arranged on the support mounting blocks, which recommends to form the support resilient so that in an undesirable collision, for example, with the rail body, the sensors recede and thus can be protected from damage.
Um einerseits den konstanten Abstand zu der Schienenoberfläche einzuhalten und andererseits zu verhindern, dass eine Berührung zwischen dem Träger und der Schienenoberfläche stattfindet, wird die Platte von zwei in Schienenlängsrichtung hintereinander angeordneten Rollenpaaren getragen, wobei bevorzugt die Rollen eines Rollenpaares quer zur Schienenlängsrichtung nebeneinander angeordnet sind und ihre Drehachsen unterschiedliche Winkel gegenüber der Horizontalen aufweisen. Durch eine entsprechende Lagerung der Rollen bzw. der die Rollen tragenden Platte kann sichergestellt werden, dass die Lauffläche der Rollen unabhängig vom Verschleiß einer Schiene stets tangential auf dieser aufsitzt.On the one hand to maintain the constant distance to the rail surface and on the other hand to prevent contact between the carrier and the rail surface takes place, the plate is supported by two in the rail longitudinally arranged roller pairs, preferably the rollers of a pair of rollers are arranged transversely to the rail longitudinal direction side by side and their axes of rotation have different angles with respect to the horizontal. By a corresponding bearing of the rollers or the rollers carrying the plate can be ensured that the running surface of the rollers is always seated tangentially regardless of the wear of a rail.
Die Erfindung wird im Folgenden anhand eines in den Figuren dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:
- Fig. 1
- die Wirkung eines Rades auf einen magnetinduktiven Rad- bzw. Achssensor einer Gleisfreimeldeeinrichtung (A) sowie die vergleichbare Wirkung einer erfindungsgemäßen Vorrichtung auf diesen Sensor (B),
- Fig. 2
- den rollengelagerten Träger einer Prüfvorrichtung, die ein Schienen-Neuprofil überfährt,
- Fig. 3
- den rollengelagerten Träger einer Prüfvorrichtung, die ein stark verschlissenes Schienenprofil überfährt, und
- Fig. 4
- zwei perspektivische Darstellungen einer Prüfvorrichtung mit in Montageblöcken aufgenommenen Wirbelstromsensoren, einerseits von oben und andererseits von unten betrachtet.
- Fig. 1
- the effect of a wheel on a magnet-inductive wheel or axle sensor of a track-free signaling device (A) and the comparable effect of a device according to the invention on this sensor (B),
- Fig. 2
- the roller bearing support of a test device overriding a new track profile,
- Fig. 3
- the roller bearing carrier of a test device, which passes over a heavily worn rail profile, and
- Fig. 4
- two perspective views of a tester with recorded in mounting blocks eddy current sensors, on the one hand from the top and on the other hand viewed from below.
Fig. 1A zeigt im Querschnitt die Situation, in der ein auf einer Schiene 1 rollendes Rad 2 vollständig von einem induktiven Achszählersystem 3 erkannt wird. Das Rad 2 rollt über die Schiene 1 und beeinflusst den Verlauf der von dem Elektromagneten 3a ausgehenden Feldlinien 4 derart, dass in der Empfängerspule 3b des Achs- bzw. Radsensors eine Induktionsspannung hervorgerufen wird, die zu einer Auslösung der Achs- bzw. Raderkennung führt. Fig. 1B zeigt im Querschnitt die Situation, in der eine Prüfvorrichtung gemäß einem Ausführungsbeispiel der Erfindung entlang der Schiene 1 rollt und von dem induktiven Achszählersystem 3 erkannt wird. Die aus ferromagnetischem Material bestehende Trägerplatte 5 beeinflusst den Feldlinienverlauf 4 in gleicher Weise wie das Rad 2. Die Prüfvorrichtung 5 bewirkt somit ebenso wie ein Rad eindeutige Schaltzustände in der Gleisfreimeldeeinrichtung, so dass diese störungsfrei arbeiten kann.1A shows in cross-section the situation in which a wheel 2 rolling on a
Fig. 2 zeigt das Querschnittsprofil der Trägerplatte 5 der Prüfvorrichtung sowie eines der beiden die Trägerplatte 5 tragenden Rollenpaare 6, 6. Die unter einem Winkel zueinander verlaufenden Drehachsen der Rollen 6, 6 sind an ihren einander zugewandten Enden mit einem Lagerbock 7 verbunden, der die Trägerplatte 5 trägt. Durch eine auf das Rollenpaar 6, 6 wirkende, zu der Schiene 1 hin gerichtete Kraft 10 ist gewährleistet, dass die Rollen 6, 6 ungeachtet des Ausmaßes des Verschleißes der Schiene 1 immer tangential an deren Oberfläche anliegen und somit stets ein konstanter Abstand zwischen der Trägerplatte 5 und der Schienenoberfläche eingehalten wird. Die Neigung und der Abstand zwischen den beiden Rollen 6, 6 ist so eingestellt, dass die eine Rolle in ständigem Kontakt mit der Fahrkante 8 und die andere Rolle in ständigem Kontakt mit dem Fahrspiegel 9 ist.Fig. 2 shows the cross-sectional profile of the
Fig. 3 zeigt ein über eine stark verschlissene Schiene 1 vom Typ UIC 60 laufendes Rollenpaar 6, 6. Die Trägerplatte 5 ist so gestaltet, dass es auch bei hohem Verschleiß zu keiner Berührung mit dem sich aus dem verschleißbedingtem Materialabtrag entstandenen Überstand 11 kommt.FIG. 3 shows a
Fig. 4 zeigt die gesamte Prüfvorrichtung nach einem Ausführungsbeispiel der Erfindung in zwei perspektivischen Ansichten. Die obere Darstellung zeigt die Vorrichtung von oben betrachtet und die untere Darstellung zeigt die Vorrichtung von unten betrachtet.Fig. 4 shows the entire testing device according to an embodiment of the invention in two perspective views. The upper view shows the device viewed from above and the lower view shows the device viewed from below.
Die Trägerplatte 5 ist an ihrem vorderen und hinteren Ende mit jeweils zwei nebeneinander liegenden Durchbrüchen für den Durchgriff der Rollen 6 versehen. Zwischen den beiden Rollenpaaren 6, 6 befinden sich mehrere, im vorliegenden Beispiel vier Montageblöcke 13 für die Aufnahme jeweils eines Wirbelstromsensors. Die Montageblöcke 13 sind so ausgebildet, dass die Wirbelstromsensoren 12 beispielsweise bei Beschädigung schnell ausgewechselt werden können. Die Montageblöcke 13 bilden jeweils einen individuellen Haltewinkel für die Wirbelstromsensoren 12 in Bezug auf die Trägerplatte 5. Die Winkel sind so gewählt, dass die der Schiene 1 zugewandten unteren Oberflächen 14 der durch Bohrungen in der Trägerplatte 5 ragenden Wirbelstromsensoren 12 jeweils tangential zum gegenüberliegenden Oberflächenbereich der gekrümmten Schiene 1 verlaufen. Die beiden Rollenpaare 6, 6 sorgen für den konstanten Abstand zwischen den Oberflächen 14 der Wirbelstromsensoren 12 und der Schienenoberfläche. Die Montageblöcke 13 enthalten einen Federmechanismus, der die Wirbelstromsensoren 12 in Richtung zur Schiene 1 hin vorspannt und in ihrer Position hält. Hierdurch können die Wirbelstromsensoren 12 im Falle einer unerwünschten Kollision mit einem harten Gegenstand zurückweichen und somit vor Beschädigungen geschützt werden.The
Die in Fig. 4 dargestellte Vorrichtung kann an einem Schienenprüfzug oder Schienenschleifzug angebracht sein und mit diesem entlang der Gleisstrecke mitgeführt werden. Sie kann jedoch auch an einem manuell betreibbaren Fahrgestell oder einer Draisine angebracht sein, um durch diese entlang der Schienen bewegt zu werden. Die Haltevorrichtung für die Anbringung der Vorrichtung, d.h. der Lagerung der Rollenpaare 6, 6 in der Weise, dass diese in ständigem Kontakt mit der Schienenoberfläche sind, am Zug bzw. Fahrgestell ist nicht dargestellt.The device shown in Fig. 4 may be mounted on a Schienenprüfzug or Schienenschleifzug and be carried along with this along the track. However, it can also be attached to a manually operable chassis or a trolley to be moved by them along the rails. The holding device for the attachment of the device, ie the storage of the roller pairs 6, 6 in such a way that they are in constant contact with the rail surface are on the train or chassis is not shown.
Claims (10)
- Device for guided movement of eddy current sensors (12) along railway tracks (1) for the purpose of non-destructive inspection of its surface, and the eddy current sensors (12) are mounted on a support (5) which slides on the tracks (1) or is guided along by means of rollers, characterised in that the support (5) is at least partially composed of ferro-magnetic material, and it is relative to its magnetic or magnetic-inductive effect on track switching means designed like a standard wheel of a rail vehicle.
- Device according to Claim 1, characterised in that the support (5) is a ferro-magnetic plate (5) which is mounted on rollers (6) like an angled partial area of a wheel with track rim and wheel run.
- Device according to Claim 1 or 2, characterised in that the eddy current sensors (12) are held independently from track wear at a constant distance from the track movement edge (8) and the track drive mirror (9).
- Device according to one of Claims 1 to 3, characterised in that the eddy current sensors (12) are exchangeably held on assembly blocks (13) which are arranged on the support (5).
- Device according to Claim 4, characterised in that the eddy current sensors (12) are held in a springy manner.
- Device according to one of Claims 1 to 5, characterised in that the plate (5) is supported by two pairs of rollers (6, 6) which are arranged one behind the other as seen in the longitudinal direction of a track.
- Device according to Claim 6, characterised in that the rollers (6) of a pair of rollers are arranged transversely to the longitudinal direction of a track, and their rotary axes are at different angles relative to the horizontal.
- Device according to one of Claims 1 to 7, characterised in that the rollers (6) are mounted in such a manner that their running surface is independently of wear of a track (1) always tangentially seated thereon.
- Device according to one of Claims 1 to 8, characterised in that it is designed for being guided along a track inspection train of a track dragging train.
- Device according to one of Claims 1 to 8, characterised in that it is designed for being guided along a manually operated frame or carriage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1025114 | 2003-12-23 | ||
| NL1025114 | 2003-12-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1547898A1 EP1547898A1 (en) | 2005-06-29 |
| EP1547898B1 true EP1547898B1 (en) | 2006-07-05 |
Family
ID=34545955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04090504A Active EP1547898B1 (en) | 2003-12-23 | 2004-12-22 | Device for guiding eddy current sensors along railway tracks for a non destructive inspection of the rail surface |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1547898B1 (en) |
| AT (1) | ATE332261T1 (en) |
| DE (1) | DE502004000916D1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT525305A1 (en) * | 2021-08-04 | 2023-02-15 | Siemens Mobility Austria Gmbh | Sensor arrangement and landing gear |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH357086A (en) * | 1957-03-19 | 1961-09-30 | Werk Signal Sicherungstech Veb | Control device in equipment of railway safety systems for the end of train signal or axle counting with magnetic, inductive or capacitive impulses |
| US3144227A (en) * | 1959-08-14 | 1964-08-11 | Int Standard Electric Corp | Electromagnetic track apparatus, particularly for axle-counting systems in railway safety installations |
| AT287066B (en) * | 1969-04-24 | 1971-01-11 | Simmering Graz Pauker Ag | Device to improve the axle counting on the drive |
| FR2831508B1 (en) * | 2001-10-30 | 2004-11-19 | Sncf | AXLE COUNTER ERROR ELIMINATION DEVICE FOR RAIL VEHICLE, CORRESPONDING VEHICLE BOGGY AND METHOD FOR CONTROLLING THE PASSAGE OF A RAIL VEHICLE IN A CANTON |
-
2004
- 2004-12-22 EP EP04090504A patent/EP1547898B1/en active Active
- 2004-12-22 AT AT04090504T patent/ATE332261T1/en not_active IP Right Cessation
- 2004-12-22 DE DE502004000916T patent/DE502004000916D1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP1547898A1 (en) | 2005-06-29 |
| ATE332261T1 (en) | 2006-07-15 |
| DE502004000916D1 (en) | 2006-08-17 |
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