Dynamic characteristic evaluation and diagnosis of mechanical/biological systems by non-contact laser excitation system

• Project/Area Number: 16H04286
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Dynamics/Control
• Research Institution: Hokkaido University
• Principal Investigator: Kajiwara Itsuro 北海道大学, 工学研究院, 教授 (60224416)
• Co-Investigator(Kenkyū-buntansha): 大橋 俊朗 北海道大学, 工学研究院, 教授 (30270812)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000); Fiscal Year 2018: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2017: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2016: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
• Keywords: 機械力学・制御 / 振動解析・試験 / 非接触レーザー加振 / 損傷検知 / インパルス応答 / レーザー誘起プラズマ / 振動計測 / 音響計測 / 周波数応答 / 構造ヘルスモニタリング / 生物・生体工学

Outline of Final Research Achievements

This study developed a health monitoring system for detecting damage on structures. An approach for detecting a hole drilled on a pipe based on laser plasma acoustic excitation and acoustic measurement is included in the results of this study. Non-contact acoustic impulse excitation can be realized by laser-induced plasma and a microphone is used for measuring the time response of acoustic pressure. In this study, we focus on the detection of the hole on the pipe. The time response of acoustic pressure changes due to reflection of acoustic wave caused at the hole drilled on the pipe. The position of the hole is identified by applying continuous wavelet transform to measured time response data with/without the hole. This study demonstrated the effectiveness of the present damage detection method based on the acoustic excitation using the laser-induced plasma.

Academic Significance and Societal Importance of the Research Achievements

本研究で開発した技術は，非接触かつ高周波数帯域の振動計測を可能にするが故，MEMSなどを対象にした振動計測および自動車など実稼働時の計測が要求される分野において，革新的な振動計測技術となることが期待できる．さらに，高周波数帯域での微小な振動特性の変化を捉えることにより，システムの故障や異常を高感度で検知できるヘルスモニタリングシステムの構築が可能になる．本技術はシステム全体の高周波振動計測に基づく検査法であるため，システム全体としての大域的な診断における高感度化および高効率化が達成され，振動実験解析法の発展およびシステムの高信頼化に大きく寄与し，工学的に極めて有用であるといえる．

Research Products

• [Journal Article] Vibration control of automotive drive system with backlash considering control period constraint (2019)
  • Author(s): YONEZAWA Heisei、KAJIWARA Itsuro、NISHIDOME Chiaki、HIRAMATSU Shigeki、SAKATA Masato、HATANO Takashi
  • Journal Title: Journal of Advanced Mechanical Design, Systems, and Manufacturing Volume: 13 Issue: 1 Pages: JAMDSM0018-JAMDSM0018
  • DOI: 10.1299/jamdsm.2019jamdsm0018
  • NAID: 130007604471
  • ISSN: 1881-3054
  • Peer Reviewed / Open Access
• [Journal Article] Evaluation of the clamping force of bolted joints using local mode characteristics of a bolt head (2018)
  • Author(s): Naoki Hosoya, Takahiko Hosokawa, Itsuro Kajiwara, Shinji Hashimura, and Feblil Huda
  • Journal Title: Journal of Nondestructive Evaluation Volume: 37 Issue: 4 Pages: 75-75
  • DOI: 10.1007/s10921-018-0528-7
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Experimental verification of a real-time tuning method of a model-based controller by perturbations to its poles (2018)
  • Author(s): Kajiwara Itsuro、Furuya Keiichiro、Ishizuka Shinichi
  • Journal Title: Mechanical Systems and Signal Processing Volume: 107 Pages: 396-408
  • DOI: 10.1016/j.ijmecsci.2018.03.023
  • NAID: 120006463567
  • Peer Reviewed / Open Access
• [Journal Article] Damage detection in pipes based on acoustic excitations using laser-induced plasma (2018)
  • Author(s): Kajiwara, I., Akita, R. and Hosoya, N.
  • Journal Title: Mechanical Systems and Signal Processing Volume: -
  • NAID: 120006486805
  • Peer Reviewed / Open Access
• [Journal Article] Dynamic characterizations of underwater structures using noncontact vibration tests based on nanosecond laser ablation in water: evaluation of passive vibration suppression with damping materials (2017)
  • Author(s): Hosoya Naoki、Kajiwara Itsuro、Umenai Koh、Maeda Shingo
  • Journal Title: Journal of Vibration and Control Volume: - Issue: 16 Pages: 3714-3725
  • DOI: 10.1177/1077546317710158
  • Peer Reviewed / Open Access
• [Journal Article] Numerical simulations of magnetic resonance elastography using finite element analysis with a linear heterogeneous viscoelastic model (2017)
  • Author(s): Tomita Sunao、Suzuki Hayato、Kajiwara Itsuro、Nakamura Gen、Jiang Yu、Suga Mikio、Obata Takayuki、Tadano Shigeru
  • Journal Title: Journal of Visualization Volume: 21 Issue: 1 Pages: 133-145
  • DOI: 10.1007/s12650-017-0436-4
  • NAID: 120006383831
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Lamb wave generation using nanosecond laser ablation to detect damage (2017)
  • Author(s): Hosoya, N., Umino, R., Kanda, A., Kajiwara, I. and Yoshinaga, A.
  • Journal Title: Journal of Vibration and Control Volume: 印刷中 Issue: 24 Pages: 5842-5853
  • DOI: 10.1177/1077546316687904
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Non-destructive ripeness assessment of apples using a non-contact laser excitation system based on a laser-induced plasma shock wave (2017)
  • Author(s): Hosoya, N., Mishima, M., Kajiwara, I. and Maeda, S.
  • Journal Title: Postharvest Biology and Technology Volume: 128 Pages: 11-17
  • DOI: 10.1016/j.postharvbio.2017.01.014
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Nano-second Laser-induced Breakdown Shock Wave in Air for Non-contact Vibration Testing (2016)
  • Author(s): Hosoya, N., Nagata, M., Kajiwara, I., Umino, R.
  • Journal Title: Experimental Mechanics Volume: 56 Issue: 7 Pages: 1305-1311
  • DOI: 10.1007/s11340-016-0167-9
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Visualization of Lamb waves propagating in transparent materials using high-speed camera (2018)
  • Author(s): Katsumata, T., Hosoya, N., Kanda, A., Kajiwara, I. and Onuma, T.
  • Organizer: The 5th Asia-Pacific Conference on Engineering and Applied Science
  • Int'l Joint Research
• [Presentation] DEAによる構造物の振動制御に関する研究(DEAの積層構成と制御効果の考察) (2018)
  • Author(s): 平原隼人、梶原逸朗、細矢直基、前田真吾
  • Organizer: Dynamics and Design Conference 2018
• [Presentation] 実験モード解析による「太陽のタマゴ」の硬さ評価 (2018)
  • Author(s): 細矢直基、出西勇気、高橋健太郎、梶原逸朗
  • Organizer: Dynamics and Design Conference 2018
• [Presentation] Excitation system based on laser-induced plasma to generate Lamb wave (2017)
  • Author(s): Hosoya, N., Yoshinaga, A., Kanda, A., Umino, R. and Kajiwara, I.
  • Organizer: International Conference on Engineering Vibration 2017
  • Int'l Joint Research
• [Presentation] Bolt Loosening Diagnosis by Measuring Vibration Responses Excited by Laser Induced Plasma (2017)
  • Author(s): Singh, M.P., Kajiwara, I. and Hosoya, N.
  • Organizer: The 17th Asian Pacific Vibration Conference
  • Int'l Joint Research
• [Presentation] Structural Health Monitoring Based on Laser Excitation Vibration Test and Wavelet Transform (2017)
  • Author(s): Cao, S., Kajiwara, I., Li, X. and Hosoya, N.
  • Organizer: The 11th International Conference on Sensing Technology
  • Int'l Joint Research
• [Presentation] レーザーを用いた音響加振に基づく閉空間内の異物検知 (2017)
  • Author(s): 小田一心、梶原逸朗、細矢直基
  • Organizer: Dynamics and Design Conference 2017
• [Presentation] レーザーアブレーションを用いた Lamb波の生成（金属チップによる損傷防止） (2017)
  • Author(s): 奥村洋平、細矢直基、神田淳、岩﨑紗綾、梶原逸朗
  • Organizer: Dynamics and Design Conference 2017
• [Presentation] Quality assessment of apples based on modal analysis using laser-induced plasma shock wave (2016)
  • Author(s): Mishima, M., Hosoya, N., Kajiwara, I. and Maeda, S.
  • Organizer: ISMA2016 International Conference on Noise and Vibration Engineering
  • Place of Presentation: KU Leuven (Leuven, Belgium)
  • Year and Date: 2016-09-19
  • Int'l Joint Research
• [Presentation] レーザプラズマ音響加振・計測による構造ヘルスモニタリング (2016)
  • Author(s): 秋田涼佑、梶原逸朗、細矢直基
  • Organizer: Dynamics and Design Conference 2016
  • Place of Presentation: 山口大学常盤キャンパス(宇部市)
  • Year and Date: 2016-08-23
• [Presentation] 制御性指標に基づくスマート構造のアクチュエタ配置最適化 (2016)
  • Author(s): 北畠茂幹、梶原逸朗、有坂寿洋
  • Organizer: Dynamics and Design Conference 2016
  • Place of Presentation: 山口大学常盤キャンパス(宇部市)
  • Year and Date: 2016-08-23
• [Remarks] 北海道大学 大学院工学研究院 人間機械システムデザイン部門 知的構造システム研究室 ホームページ
  • URL: http://labs.eng.hokudai.ac.jp/labo/lsm/
• [Remarks] 北海道大学 知的構造システム研究室
  • URL: http://labs.eng.hokudai.ac.jp/labo/lsm/
• [Remarks] 北海道大学 スマートメカニズム研究室
  • URL: http://labs.eng.hokudai.ac.jp/labo/lsm/