Global patent index - EP 1087882 A2

EP 1087882 A2 2001-04-04 - METHOD AND DEVICE FOR DETECTING DEFECTS IN A GUIDE RAIL

Title (en)

METHOD AND DEVICE FOR DETECTING DEFECTS IN A GUIDE RAIL

Title (de)

VERFAHREN UND VORRICHTUNG ZUM NACHWEIS EINES DEFEKTS EINER FÜHRUNGSSCHIENE

Title (fr)

PROCEDE ET DISPOSITIF POUR DETECTER UN DEFAUT DANS UN RAIL DE GUIDAGE

Publication

EP 1087882 A2 (DE)

Application

EP 99936426 A

Priority

  • DE 9901671 W
  • DE 19826421 A

Abstract (en)

[origin: WO9966320A2] A method for detecting a defect (48) in a guide rail (1) is disclosed, wherein an ultrasound wave (40) that is injected into the guide rail (1) with a frequency of less than 100 kHz is detected on the opposing inner sides (41, 43) of the rail surface (39) after at least two reflections. The method can be implemented both in reflection and transmission mode. The rail of a railroad, for instance, can be monitored during train operation on the railway to detect defects and rail fractures. Preferred devices for implementing the method are also disclosed. Several devices can be combined to form a monitoring system, with the aid of which long distances covering several hundred kilometers can also be monitored.

IPC 1-7 (main, further and additional classification)

B61L 23/04; G01N 29/04

IPC 8 full level (invention and additional information)

B61L 23/04 (2006.01); G01N 29/04 (2006.01); G01N 29/34 (2006.01)

CPC (invention and additional information)

B61L 23/044 (2013.01); G01N 29/043 (2013.01); G01N 29/348 (2013.01); G01N 2291/0422 (2013.01); G01N 2291/044 (2013.01); G01N 2291/056 (2013.01); G01N 2291/2623 (2013.01)

Citation (search report)

See references of WO 9966320A3

Designated contracting state (EPC)

FI FR

EPO simple patent family

WO 9966320 A2 19991223; WO 9966320 A3 20000413; DE 19826421 C1 20000309; EP 1087882 A2 20010404; NO 20006391 A 20010216; NO 20006391 D0 20001214

INPADOC legal status

2004-04-28 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20031017

2002-08-14 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20020703

2001-04-04 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001206

2001-04-04 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): FI FR