2022 Fiscal Year Final Research Report
Self-Sensing Sytem with Micro Energy Harvester for Structural Health Monitoring
| Project/Area Number |
20K04641
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 22010:Civil engineering material, execution and construction management-related
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| Research Institution | Hokkaido University (2021-2022)
Kyoto University (2020) |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
張 凱淳 京都大学, 工学研究科, 講師 (50751723)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 社会インフラ構造物 / 維持管理 / モニタリング / MEMS / 固有振動数 / センシング |
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| Outline of Final Research Achievements |
Micro energy harvesters (MEH) based on microelectromechanical systems (MEMS) are rapidly developing, providing a green and virtually infinite energy source. The electrostatic vibrational power generator outputs electric power when it vibrates, motivating us to apply it to vibrating civil infrastructures excited by daily loading or sudden event such as earthquake. An innovative monitoring system utilizing MEH devices was proposed for detecting structural health condition of social infrastructures and buildings. The change in natural frequency and amplitude could be monitored by the change in the generated power. A power generation index to detect the damage was proposed and its applicability was verified with the numerical models. The slab and pier models studied herein were simplified and the vibrations used to calculate the MEH generated energy were simply harmonic. More complicated structural types, models, and vibration patterns would help in generalizing the proposed methods.
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| Free Research Field |
コンクリート工学，非破壊検査工学，維持管理工学
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| Academic Significance and Societal Importance of the Research Achievements |
インフラ構造物の点検業務・稼働に物理的な限界があり，状態変化と異常検知に時差が発生する。インフラ状点検作業を振動発電デバイス設置で置換することにより，振動発電デバイスが自己動作（発電）することでリアルタイムモニタリングが可能となる。また，構造物の変位・振動応答と精緻な整合データを出力可能な小型・安価なデバイスの開発による監視範囲の拡大と現場端末および管理サーバとのネットワークを構築できる。本研究の成果により，地方自治体および分野横断型研究開発体制と民間道路管理会社との連携による実務点検業務フローへの実装・実証的アプローチを示すことができる。
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