Detection of an evanescent scattered wave field by the dynamic shear strain and spatio-temporal gradient analysis
| Project/Area Number |
22560421
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Measurement engineering
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| Research Institution | Saga University |
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Principal Investigator |
TERAMOTO Kembu 佐賀大学, 工学(系)研究科(研究院), 教授 (70207489)
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| Project Period (FY) |
2010-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 非破壊検査 / 超音波計測 / 動的せん断歪み解析 / 超音波撮像 / 波動応用計測 / ガイド波 / ラム波 / 波動情報処理 / 時空間勾配解析 / 動的せん断歪み解析法 / 品質評価 / ナノスケール計測 / 超解像 / ナノイメージング / 場の動的計測 |
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| Outline of Final Research Achievements |
A Quantitative acoustical imaging technology is used or developed to classify the region of defect. The proposed evanescent field imaging method can be summarized as follows. 1) The distributions of the normal displacement of the object surface is governed by the 2-dimensional wave equation in the Lamb-wave field. 2) When the single propagating wave front exists on the surface of the object with no defect, the orthogonal pair of the out-of-plane shear strains are linearly dependent each other. Therefore the determinant of a covariance matrix which is composed of the orthogonal pair of the shear strains becomes zero. 3) When a region of interest having somewhat inhomogeneity exists, scattered wave arises in the Lamb-wave field. Consequently, the determinant becomes larger than zero because of the independency between the orthogonal pair over the region of the scattered and incident wave field.
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Report
(6 results)
Research Products
(38 results)
