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dc.contributor.authorSkjelvareid, Martin Hansen
dc.contributor.authorOlofsson, Tomas
dc.contributor.authorBirkelund, Yngve
dc.date.accessioned2012-03-23T07:20:32Z
dc.date.available2012-03-23T07:20:32Z
dc.date.issued2011
dc.description.abstractSynthetic aperture focusing is known to increase both the lateral resolution and signal-to-noise level of pulse-echo ultrasonic images. In this paper, the use of synthetic aperture imaging for detection and sizing of pitting in a plate is considered. It is assumed that a water layer is present between the transducer and the plate, and that the pitting is on the back side of the plate, seen from the transducer. To account for the different wave velocities of the water and plate layers, one of the recently proposed multilayer synthetic aperture algorithms is used. The algorithm can be adapted to both 2D (line scan) and 3D (surface scan) data, and these two variations are tested on a number of artificial pittings in an aluminum plate. Comparison of raw and focused images shows that the algorithm significantly improves the lateral resolution, thus enabling an accurate estimation of the pitting shape.en
dc.identifier.citationIEEE International Ultrasonics Symposium Proceedings (2011)en
dc.identifier.cristinIDFRIDAID 869975
dc.identifier.issn1051-0117
dc.identifier.urihttps://hdl.handle.net/10037/4045
dc.identifier.urnURN:NBN:no-uit_munin_3766
dc.language.isoengen
dc.publisherIEEEen
dc.rights.accessRightsopenAccess
dc.subjectVDP::Technology: 500::Electrotechnical disciplines: 540en
dc.subjectVDP::Teknologi: 500::Elektrotekniske fag: 540en
dc.titleUltrasonic imaging of pitting using multilayer synthetic aperture focusingen
dc.typeJournal articleen
dc.typeTidsskriftartikkelen
dc.typePeer revieweden


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