Laser Doppler velocimetry for three-dimensional distribution measurement of velocity vectors based on optical spatial encoding

• Project/Area Number: 19K04426
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21030:Measurement engineering-related
• Research Institution: Kagawa University
• Principal Investigator: Maru Koichi 香川大学, 創造工学部, 教授 (00530164)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 計測工学 / 計測機器 / 速度分布計測 / レーザドップラー速度計 / 速度計測

Outline of Research at the Start

申請者は，光を用いた非接触な速度分布計測技術として，精密な位置情報取得を可能とする光空間エンコード化と，高精度かつ空間分解能の高い計測が可能な差動型レーザドップラー速度計測技術を利用した手法を提案してきた．本研究では，提案手法を発展させ，高精度で扱いやすい新たな3次元空間速度ベクトル分布計測方法を確立するための技術開発を行い，使い勝手の良い装置を実現するための道筋を模索する．

Outline of Final Research Achievements

We studied the technologies to establish the method for measuring three-dimensional distributions of velocity vectors based on optical spatial encoding and differential laser Doppler velocimetry. We demonstrated the three-dimensional distribution measurement of a velocity component by developing a 4x4x5-channel experimental setup. We also developed the measurement system for measuring three velocity components for measuring velocity vectors. In addition, we designed Nb2O5/SiO2-based input/output grating couplers with high optical efficiency for integrated waveguide devices.

Academic Significance and Societal Importance of the Research Achievements

本研究の提案手法により，3次元空間内の精密な位置情報取得を可能としたファイバ光学系による扱いやすい3次元速度分布計測装置が実現できる．この結果，産業分野や医療分野等，様々な分野への貢献が期待できる．また，光学系を集積化することで，マイクロ流路等の微小領域で高精度に速度分布を計測するための超小型装置の実現が期待でき，創薬等に利用されるマイクロ流体デバイスの開発等に役立てることができる．

Research Products

• [Journal Article] Two-dimensional spatially encoded cross-sectional velocity distribution measurements based on coherent bias-frequency encoding and wavelength-division multiplexing (2021)
  • Author(s): K. Maru
  • Journal Title: Opt. Commun. Volume: 485 Pages: 126740-126740
  • DOI: 10.1016/j.optcom.2020.126740
  • Peer Reviewed
• [Journal Article] Two-dimensional distribution measurement of in-plane velocity component using bias-frequency spatial encoding (2021)
  • Author(s): K. Maru, Y. Hashimoto, S. N. A. B. Abd Ghafar
  • Journal Title: Opt. Eng. Volume: 60 Issue: 03
  • DOI: 10.1117/1.oe.60.3.034108
  • Peer Reviewed
• [Journal Article] Differential laser Doppler velocimetry for cross-sectional velocity distribution measurements using 48-channel spatial encoding and nonmechanical scanning (2019)
  • Author(s): K. Maru, Y. Yoshida, M. Yukinari, R. Kimura
  • Journal Title: Opt. Rev. Volume: 26 Issue: 5 Pages: 487-492
  • DOI: 10.1007/s10043-019-00544-0
  • Peer Reviewed
• [Journal Article] Design of transmission-type refractive index sensor, based on silica planar lightwave circuit using combination of refractive angle and phase measurements (2019)
  • Author(s): K. Maru
  • Journal Title: Sensors Volume: 19 Issue: 19 Pages: 4095-4095
  • DOI: 10.3390/s19194095
  • Peer Reviewed
• [Presentation] Nb2O5-based grating coupler employing multiple Nb2O5/SiO2 layers in integrated probe for cross-sectional velocity distribution measurement (2021)
  • Author(s): K. Maru, Y. Yamamoto, K. Nakatsuhara
  • Organizer: 26th Microoptics Conference (MOC2021)
  • Int'l Joint Research
• [Presentation] 空間エンコード化と波長走査を組み合わせた3次元速度分布計測方法 (2021)
  • Author(s): 山地陽翔，S. N. A. B. Abd Ghafar，丸浩一
  • Organizer: 令和3年度SICE四国支部学術講演会
• [Presentation] Velocity distribution measurements based on differential laser Doppler velocimetry (2020)
  • Author(s): K. Maru
  • Organizer: 30th International Symposium on Imaging, Sensing, and Optical Memory (ISOM’20)
  • Int'l Joint Research / Invited
• [Presentation] Simultaneous cross-sectional velocity distribution measurements using laser Doppler velocimeter employing 7 × 8 spatial encoding (2019)
  • Author(s): M. Yukinari, K. Maru
  • Organizer: 24th Microoptics Conference (MOC2019)
  • Int'l Joint Research
• [Presentation] Design of chirped focusing grating coupler in Nb2O5-based integrated probe for laser Doppler cross-sectional velocity distribution measurement (2019)
  • Author(s): S. Doi, K. Maru, K. Nakatsuhara
  • Organizer: 24th Microoptics Conference (MOC2019)
  • Int'l Joint Research