Imaging defects in a plate with full non-contact scanning laser source technique

Hayashi, Takahiro; Murase, Morimasa; Ogura, Natsuki et al.

Materials Transactions, 2014, 55(7), 1045-1050

Number of Access:263（2025-11-13 08:32 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84963

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Title
Imaging defects in a plate with full non-contact scanning laser source technique
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
Ogura, Natsuki
CreatorName
Kitayama, Tsunaji
Subject
laser ultrasonics
Lamb waves
imaging
non-contact evaluation
air-coupled ultrasonic transducer
Description
Takahiro Hayashi, Morimasa Murase, Natsuki Ogura, Tsunaji Kitayama, Imaging Defects in a Plate with Full Non-Contact Scanning Laser Source Technique, MATERIALS TRANSACTIONS, 2014, 55(7), pp. 1045-1050, https://doi.org/10.2320/matertrans.I-M2014817.
Abstract
Previously, we used contact receiving transducers in the scanning laser source (SLS) technique for imaging defects on a plate in order to achieve a high signal-to-noise (SN) ratio. Herein, we developed a fast non-contact defect imaging technique that employs the SLS technique for in-line product inspection. Leaky Lamb waves from a plate were detected with a sufficiently large SN ratio by using low-frequency air-coupled transducers. Spurious images caused by reflected waves in the plate were removed by synthesizing images from multiple receivers. Defect images were compared for different repetition frequencies of laser emission. Images were found to be distorted at high repetition frequencies (2/3 kHz) owing to reverberations in the plate.
Publisher
The Japan Institute of Metals and Materials
Source Title
Materials Transactions
Volume (Issue)
55(7)
Page
1045-1050
Date of Issued
2014-07-01
Language
English
Handle URL
https://hdl.handle.net/11094/84963
PISSN
13459678
eISSN
13475320
NCID
AA1151294X
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.2320/matertrans.I-M2014817
Access Rights
open access
CopyRight
© 2014 The Japanese Society for Non-Destructive Inspection
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article