EP 1087882 A2 20010404 - 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
Application
Priority
- DE 9901671 W 19990607
- DE 19826421 A 19980616
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
IPC 8 full level
B61L 23/04 (2006.01); G01N 29/04 (2006.01); G01N 29/34 (2006.01)
CPC (source: EP)
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 9966320A2
Designated contracting state (EPC)
FI FR
DOCDB simple family (publication)
WO 9966320 A2 19991223; WO 9966320 A3 20000413; DE 19826421 C1 20000309; EP 1087882 A2 20010404; NO 20006391 D0 20001214; NO 20006391 L 20010216
DOCDB simple family (application)
DE 9901671 W 19990607; DE 19826421 A 19980616; EP 99936426 A 19990607; NO 20006391 A 20001214