DocumentCode :
1664958
Title :
Development of a synthetic A-scan technique for ultrasonic testing of pipelines
Author :
Gunarathne, G.P.P. ; Qureshi, Y.
Author_Institution :
Sch. of Eng., Robert Gordon Univ., Aberdeen, UK
Volume :
1
fYear :
2002
fDate :
6/24/1905 12:00:00 AM
Firstpage :
547
Abstract :
Multiple boundary echoes are often seen in ultrasonic testing of materials. Although these echoes can be a problem in many situations, they can also be used to advantage e.g. in identifying disbonds of laminates or properties of materials beneath the test surface, such as scale deposits in pipelines. However, that requires echo comparison with signals from reference acoustic targets or templates. This is an exhaustive process, particularly when testing non-planar materials such as pipelines. In this paper, a new approach to synthesise reference signals using numerical modelling and computation is presented as an alternative method. The results of signal synthesis have been verified by experiment. Although the techniques described are specifically related to testing of pipelines, they can be extended to other general applications in nondestructive testing of materials.
Keywords :
acoustic field; acoustic intensity; echo; signal synthesis; ultrasonic materials testing; NDT; boundary transmission characteristics; effective target area; multiple boundary echoes; nonplanar surface profiles; numerical modelling; pipelines; radiation pressure field; reference signals; scale deposits; synthetic A-scan technique; transmitting transducer; ultrasonic testing; Acoustic testing; Acoustic transducers; Acoustic waves; Inspection; Materials testing; Nondestructive testing; Numerical models; Pipelines; Probes; Signal synthesis;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2002. IMTC/2002. Proceedings of the 19th IEEE
ISSN :
1091-5281
Print_ISBN :
0-7803-7218-2
Type :
conf
DOI :
10.1109/IMTC.2002.1006901
Filename :
1006901
Link To Document :
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