Line-focusing of ultrasonics SV wave by electromagnetic acoustic transducer

Ogi, Hirotsugu; Hirao, Masahiko; Ohtani, Toshihiro

Journal of the Acoustical Society of America, 1998, 103(5), 2411-2415

アクセス数:549件（2025-08-23 13:53 集計）

固定URL: https://hdl.handle.net/11094/84151

閲覧可能ファイル 

ファイル フォーマット 利用条件 サイズ 閲覧回数 利用開始日 説明 information
161597_1 pdf なし 208 KB 367 2021.09.14  

論文情報

ファイル出力 EndNote Basic出力 Mendeley出力

タイトル
Line-focusing of ultrasonics SV wave by electromagnetic acoustic transducer
著者
NRID
1000090252626 1000090252626
researchmap permalink
read0042771 read0042771
Scopus Author ID
35563683500 35563683500
著者名
Ogi, Hirotsugu
NRID
1000080112027 1000080112027
著者名
Hirao, Masahiko
著者名
Ohtani, Toshihiro
内容
Hirotsugu Ogi, Masahiko Hirao, Toshihiro Ohtani. Line-focusing of ultrasonics SV wave by electromagnetic acoustic transducer. Journal of the Acoustical Society of America, 1998, 103(5), 2411. https://doi.org/10.1121/1.422760.
抄録
An electromagnetic acoustic transducer has been developed for line- focusing the shear-vertical (SV) wave in a metal. The EMAT consists of a permanent magnet to supply the bias magnetic field normal to the surface, and a meanderline coil to induce the dynamic field and eddy currents in the surface region of the sample. The meanderline spacing is continuously changed so that the generated SV waves from all segment sources become coherent on the focal line after traveling oblique paths. The printed circuit technique enables the fabrication of such a functionally spaced meanderline coil within 1-μm accuracy. The directivity is measured using a half-cylindrical sample of an aluminum alloy, which shows a much sharper radiation pattern of the focusing EMAT than the EMAT having a meanderline coil of constant spacings. This EMAT is then tested through detecting a shallow notch. The scattered signal from the notch is received by the same EMAT, which shows enough strength even for the notch of 0.2-mm depth.
出版者
Acoustical Society of America
収録物名
Journal of the Acoustical Society of America
巻(号)
103(5)
ページ
2411-2415
刊行年月
1998-05
言語
英語
ハンドルURL
https://hdl.handle.net/11094/84151
PISSN
00014966
NCID
AA00253792
関連情報 (isIdenticalTo)
DOI (出版社版)
https://doi.org/10.1121/1.422760
アクセス権
open access
権利情報
Copyright 1998 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.
出版タイプ
Version of Record
カテゴリ
学術雑誌論文 Journal Article