EP1485704A1 - Dispositif pour le diagnostic electromagnetique par ultrasons de roues - Google Patents

Dispositif pour le diagnostic electromagnetique par ultrasons de roues

Info

Publication number
EP1485704A1
EP1485704A1 EP02807050A EP02807050A EP1485704A1 EP 1485704 A1 EP1485704 A1 EP 1485704A1 EP 02807050 A EP02807050 A EP 02807050A EP 02807050 A EP02807050 A EP 02807050A EP 1485704 A1 EP1485704 A1 EP 1485704A1
Authority
EP
European Patent Office
Prior art keywords
test
wheels
grounding
rail vehicles
diagnostic system
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.)
Withdrawn
Application number
EP02807050A
Other languages
German (de)
English (en)
Inventor
Christian Klose
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.)
Deutsche Bahn AG
Original Assignee
Deutsche Bahn 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 Deutsche Bahn AG filed Critical Deutsche Bahn AG
Publication of EP1485704A1 publication Critical patent/EP1485704A1/fr
Withdrawn legal-status Critical Current

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
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/24—Probes
    • G01N29/2412—Probes using the magnetostrictive properties of the material to be examined, e.g. electromagnetic acoustic transducers [EMAT]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/042—Wave modes
    • G01N2291/0423—Surface waves, e.g. Rayleigh waves, Love waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/269—Various geometry objects
    • G01N2291/2696—Wheels, Gears, Bearings

Definitions

  • the invention relates to a device for grounding a diagnostic system of wheels of electrically powered rail vehicles using electromagnetic
  • Electromagnetic ultrasonic transducers generate ultrasonic waves in electrically conductive material through the Lorentz force or by using the magnetostrictive effect.
  • EMATs electromagnetic acoustic wave transducers
  • 6,347,550 finally describes the necessary further development of the method in such a way that a non-destructive testing of the volume and surface of the wheel can be ensured while the railway wheel to be tested is rolled over. Since imperfections that originate from internal surfaces (e.g. interface between wheel hub and wheel rim) can now be detected, it is possible to reliably test wheels that are made up of different parts and / or different materials.
  • the vehicles to be tested continuously drive over the test equipment with their own drive during the test process, which enables efficient and time-saving chassis diagnostics, especially when the chassis checks of the high-speed trains are carried out at short intervals.
  • the test heads based on the electromagnetic principle are integrated in the rails of the test track.
  • the invention has for its object to develop a device for grounding a diagnostic system of wheels of electrically powered rail vehicles using electromagnetic ultrasonic wave transducers, which prevents the coupling of the interference emanating from the vehicles into the ultrasonic test heads.
  • a device for grounding a diagnostic system of wheels of electrically powered rail vehicles using electromagnetic ultrasonic wave transducers which prevents the coupling of the interference emanating from the vehicles into the ultrasonic test heads.
  • the length of the galvanically insulated test track section is limited to a constructive length that is smaller than the minimum center distance of two adjacent wheel sets of the rail vehicles to be tested. In this way it is ensured that only the wheelset to be tested is located on the test track section and that there are no undesirable current flows induced in the vehicle in the test track section.
  • a particularly advantageous embodiment of the subject matter of the invention provides that all the line connections between the components of the test system located in the track field (in particular test heads and light barriers) and the switchgear units for system control, power supply and signal evaluation that are spatially separated therefrom are decoupled from high-frequency interference currents. The interference can thus be suppressed without the measurement signals being adversely affected.
  • FIG. 1 Evaluation diagram of a diagnostic process on a vehicle wheel (u A -s Can ) which is corrupted in an unusable manner by interference signals; Evaluation diagram of the interference currents measured in the area of the test heads in the track (i G ⁇ e ⁇ s )
  • Figure 2 schematic structure of the test track section
  • Figure 1 summarizes the main result of the fault analysis carried out on the systems of Irish Bahn AG.
  • the currents emitted by electric traction vehicles and / or vehicles with high-performance on-board electronic devices flow in the rail parallel to the test head or directly through the metal housing of the test head. These high-frequency currents are accompanied by a magnetic field which, due to the design of the test head, causes a voltage induction in the receiver coil. This is shown in the evaluation diagram from FIG. 1 in a clear correlation between a strong change in the current flow in the track and a voltage peak registered in the test head.
  • FIG. 2 shows the solution proposed according to the invention with regard to the future
  • test track section equipped with the test heads (1, 2, 3, 4) integrated in the rail head is galvanically separated from the adjacent track sections by means of known insulated joints (5).
  • the length of this insulated track section (6) must not exceed 1800 mm. This dimension corresponds to the minimum center distance in the bogie of the high-speed trains to be tested.
  • the insulated track section must be earthed via track connector cable (7) so that the drive reverse currents that occur can be dissipated.
  • the high-frequency interference current components must not pass through (Hochfreqenz-decoupling).

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

L'invention concerne un dispositif servant à la mise à la terre d'une installation de diagnostic de roues de véhicules sur rails à entraînement électrique par utilisation de convertisseurs électromagnétiques d'ondes ultrasonores. Ce dispositif empêche l'injection dans les palpeurs ultrasoniques des parasites provenant des véhicules tout en conservant le principe fonctionnel de base de la méthode de contrôle, et ce sans que des interventions soient nécessaires au niveau des dispositifs des véhicules. Le tronçon de voie dans la zone de travail spatiale du contrôle par ultrasons est séparé galvaniquement du potentiel électrique des zones de voies limitrophes et présente en outre une mise à la terre découplée contre des courants parasites haute fréquence.
EP02807050A 2002-03-18 2002-03-18 Dispositif pour le diagnostic electromagnetique par ultrasons de roues Withdrawn EP1485704A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2002/002967 WO2003078997A1 (fr) 2002-03-18 2002-03-18 Dispositif pour le diagnostic electromagnetique par ultrasons de roues

Publications (1)

Publication Number Publication Date
EP1485704A1 true EP1485704A1 (fr) 2004-12-15

Family

ID=27838003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02807050A Withdrawn EP1485704A1 (fr) 2002-03-18 2002-03-18 Dispositif pour le diagnostic electromagnetique par ultrasons de roues

Country Status (3)

Country Link
EP (1) EP1485704A1 (fr)
AU (1) AU2002367788A1 (fr)
WO (1) WO2003078997A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020128188A1 (de) 2020-10-27 2022-04-28 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Verfahren zum Überwachen des Zustands eines Rades eines Schienenfahrzeugs

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3218453C2 (de) * 1982-05-15 1984-06-20 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Elektromagnetischer Ultraschallwandler zur zerstörungsfreien Prüfung von elektrisch leitfähigen Werkstoffen
US5386727A (en) * 1992-06-02 1995-02-07 Herzog Contracting Corporation Dynamic rail longitudinal stress measuring system
DE19833027C1 (de) * 1998-07-23 2000-03-09 Siemens Ag Verfahren und Vorrichtung zum Prüfen eines Eisenbahnrads
DE10052045C2 (de) * 2000-06-20 2002-06-27 Fraunhofer Ges Forschung Vorrichtung und Verfahren zur Prüfung eines Eisenbahnrades

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03078997A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020128188A1 (de) 2020-10-27 2022-04-28 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Verfahren zum Überwachen des Zustands eines Rades eines Schienenfahrzeugs
WO2022089880A1 (fr) 2020-10-27 2022-05-05 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Système et procédé pour surveiller l'état d'une roue d'un véhicule ferroviaire

Also Published As

Publication number Publication date
AU2002367788A1 (en) 2003-09-29
WO2003078997A1 (fr) 2003-09-25

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