Frequency dependence of images in scanning laser source technique for a plate

Hayashi, Takahiro; Murase, Morimasa; Kitayama, Tsunaji

Ultrasonics, 2012, 52(5), 636-642

Number of Access:348（2025-11-13 10:08 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84497

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Title
Frequency dependence of images in scanning laser source technique for a plate
Creator
NRID
1000030324479 1000030324479
ORCID
0000-0001-6064-4658 0000-0001-6064-4658
researchmap permalink
takahiro_hayashi takahiro_hayashi
Scopus Author ID
37064150200 37064150200
CreatorName
Hayashi, Takahiro
CreatorName
Murase, Morimasa
CreatorName
Kitayama, Tsunaji
Subject
Nondestructive testing
Laser ultrasonics
Lamb waves
Imaging
Abstract
Defect imaging using scanning laser source technique has been investigated for a plate with rounded defects and notch-type defects in our previous studies. This paper examines frequency dependence of the defect images with both calculations and experiments in order to acquire clearer images. Both calculation and experimental results for a straight notch revealed that clearer images of notch-type defects can be obtained in the range of low frequency-thickness product below about 200 kHz mm. Moreover, images of the defects of various shapes were obtained by synthesizing images from eight receiving transducers, and similarly to the case of the straight notches, they became more clearly in the low frequency range.
Publisher
Elsevier Ltd
Source Title
Ultrasonics
Volume (Issue)
52(5)
Page
636-642
Date of Issued
2012-07
Language
English
Handle URL
https://hdl.handle.net/11094/84497
PISSN
0041624X
NCID
AA00876332
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1016/j.ultras.2012.01.003
Access Rights
open access
CopyRight
© 2012 Elsevier B.V. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article