Acoustical Holography Implementation for Defected Rails Inspection
Alexey Kh.VOPILKINDmitry A.KONONOVDmitry S.TIKHONOV
摘要：<正>This paper describes technology of acoustical holography （FT-SAFT processing） implementation for ultrasonic testing of a priory defected rails to improve repairing and exploitation of railway.Mobile system with flaws visualization in all rail volume was developed.System intended for repeated testing of rails which was marked as defected by standard inspection methodology and equipment.System allows flaws detection,size and position calculation.Size and position of flaws is taking into account at the rail lifetime calculation task. Time of next inspection also calculated.Described various types of flaws in various rail parts and inspection procedure used to detect all flaws.Rails flaws acoustical images reconstructed with FT-SAFT algorithm presented.Presented results of flaws sizing which approves possibility of acoustical holography implementation to obtain high resolving power and accurate flaws sizing if any part of rail.Presented results of flaws size measurements by fractography after rails fracturing and similarity of size measured by holography and by fractography.Described procedure of defected rail lifetime calculation which allows to decrease repairing of railway and therefore to decrease trains idle standing.
17th World Conference on Non-Destructive Testing