Quantitative nondestructive evaluation of water content distribution in materials or structures
Project/Area Number |
16H04395
|
Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
|
Research Institution | Tokyo Institute of Technology |
Principal Investigator |
HIROSE SOHICHI 東京工業大学, 環境・社会理工学院, 教授 (00156712)
|
Co-Investigator(Kenkyū-buntansha) |
古川 陽 東京工業大学, 環境・社会理工学院, 助教 (60724614)
|
Project Period (FY) |
2016-04-01 – 2020-03-31
|
Project Status |
Completed (Fiscal Year 2020)
|
Budget Amount *help |
¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2018: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2017: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2016: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
|
Keywords | ガイド波 / 分散特性 / 鋼板接着損傷評価 / 電磁波レーダ / カルマンフィルタ / スパース解 / 超音波ガイド波 / 非破壊計測 / 水分量分布 / 超音波 / 電磁波 / 層構造弾性体 / 非破壊評価 / 比誘電率 / 水分量 / 波動伝搬特性 |
Outline of Final Research Achievements |
The purpose of this study is to estimate the water content distribution inside materials or structures by nondestructive measurement using ultrasonic and electromagnetic waves. In the ultrasonic nondestructive measurement, it was shown that the presence of stagnant water in layered structures and the thickness of the water layer can be estimated by using the dispersion characteristics of ultrasonic guided waves in layered structures. In the field of electromagnetic wave measurement, we developed an algorithm for estimating the water content in soil using the Kalman filter theory based on the reflection coefficient of electromagnetic waves.
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Academic Significance and Societal Importance of the Research Achievements |
材料・構造物内部の水分の存在は,構造物の強度や寿命に大きな影響を及ぼすことから,構造物の維持管理を行う上で水分量の分布や時間変化を把握することが重要である.従来の水分量計測はあらかじめ内部に計測装置を埋め込むことによって「点」情報を得る手法が主流であった.本研究では超音波探触子や電磁波レーダなどの非破壊計測装置を用いて一度に広範囲な水分量分布を効率的に求めることを可能にしており,得られた研究成果の意義は大きい.
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Report
(5 results)
Research Products
(29 results)