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Fundamental technologies for using lasers for insitu measurement of the composition of marine particles

Research Project

Project/Area Number 18H03810
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 24:Aerospace engineering, marine and maritime engineering, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Thornton Blair  東京大学, 生産技術研究所, 准教授 (60526789)

Co-Investigator(Kenkyū-buntansha) 高橋 朋子  国立研究開発法人海洋研究開発機構, 超先鋭研究開発部門(超先鋭技術開発プログラム), Young Research Fellow (20806301)
Liu Zonghua  東京大学, 生産技術研究所, 特任研究員 (90844449)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥44,720,000 (Direct Cost: ¥34,400,000、Indirect Cost: ¥10,320,000)
Fiscal Year 2020: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
Fiscal Year 2019: ¥13,650,000 (Direct Cost: ¥10,500,000、Indirect Cost: ¥3,150,000)
Fiscal Year 2018: ¥20,280,000 (Direct Cost: ¥15,600,000、Indirect Cost: ¥4,680,000)
Keywordsレーザ分光 / ラマン分光 / ホログラフィック / 化学分析 / 現場計測 / 粒子分析 / センシング / レーザー分光 / 粒子計測
Outline of Final Research Achievements

We developed a sensor capable of measuring different types suspended marine particles, including organic carbon, inorganic carbon, micro-plastics and minerals. The sensor uses a laser beam and observes the light that is scattered by particles in seawater. The sensor can differentiate between the different types of particle in the environment by analysing the scattered light signals using machine learning. We verified the performance of our system in controlled laboratory experiments and during sea-trials. Unlike sensors that mix chemical reagents to make measurements, or those that perform physical sampling, the method developed here can make observations continuously provided electrical power can be supplied, making the developed method highly suitable for the large scale, persistent observations needed to better understand the role of marine particles on global scale chemical cycles.

Academic Significance and Societal Importance of the Research Achievements

本研究により、長期・大規模に展開可能な小型・低消費電力及びローコストな海中浮遊粒子の化学センシング技術の基礎を構築し、これまでセンシングできなかった水中における粒子の化学成分の計測を実現した。今後、社会的に重大な地球環境問題のひとつであるマイクロプラスチックスの計測をグローバルスケールで行うことが期待される。社会的意義としては、試薬等を使わないためコンタミの恐れがないため、発電所や自動車、また飲料水のパイプライン内に流れる液体中の腐食物質検出など、インフラのモニタリングに応用が可能であり、さらには、地球外の水環境調査への応用へと道が拓ける。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (17 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (3 results) Journal Article (6 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (7 results) (of which Int'l Joint Research: 7 results) Remarks (1 results)

  • [Int'l Joint Research] Aberdeen University/University of Southampton(英国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Southampton/University of Aberdeen(英国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Schemadt Ocean Institute(米国)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Digital In-line Holography for Large-Volume Analysis of Vertical Motion of Micro-scale Marine Plankton and Other Particles2021

    • Author(s)
      Zonghua Liu, Tomoko Takahashi, Dhugal Lindsay, Thangavel Thevar, Mehul Sangekar, Hiromi Watanabe, Nick Burns, John Watson, and Blair Thornton
    • Journal Title

      Journal of Oceanic Engineering(accepted)

      Volume: -

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Quantitative in situ mapping of elements in deep-sea hydrothermal vents using laser-induced breakdown spectroscopy and multivariate analysis2020

    • Author(s)
      Takahashi Tomoko、Yoshino Soichi、Takaya Yutaro、Nozaki Tatsuo、Ohki Koichi、Ohki Toshihiko、Sakka Tetsuo、Thornton Blair
    • Journal Title

      Deep Sea Research Part I: Oceanographic Research Papers

      Volume: 158 Pages: 103232-103232

    • DOI

      10.1016/j.dsr.2020.103232

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification of microplastics in a large water volume by integrated holography and Raman spectroscopy2020

    • Author(s)
      Tomoko Takahashi, Zonghua Liu, Thangavel Thevar, Nicholas Burns, Sumeet Mahajan, Dhugal Lindsay John Watson, Blair Thornton
    • Journal Title

      Applied Optics

      Volume: - Issue: 17 Pages: 5073-5073

    • DOI

      10.1364/ao.393643

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Partial least squares regression calculation for quantitative analysis of metals submerged in water measured using laser-induced breakdown spectroscopy2018

    • Author(s)
      Takahashi, T., Thornton, B., Sato, T., Ohki, T., Ohki, K. & Sakka, T.
    • Journal Title

      Applied Optics

      Volume: 57 Issue: 20 Pages: 5872-5883

    • DOI

      10.1364/ao.57.005872

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Signal preprocessing of deep-sea laser-induced plasma spectra for identification of pelletized hydrothermal deposits using Artificial Neural Networks2018

    • Author(s)
      Yoshino Soichi、Thornton Blair、Takahashi Tomoko、Takaya Yutaro、Nozaki Tatsuo
    • Journal Title

      Spectrochimica Acta Part B: Atomic Spectroscopy

      Volume: 145 Pages: 1-7

    • DOI

      10.1016/j.sab.2018.03.015

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Classification and statistical analysis of hydrothermal seafloor rocks measured underwater using laser-induced breakdown spectroscopy2018

    • Author(s)
      Yelameli, M., Thornton, B., Takahashi, T., Weerkoon, T. & Ishii, K.
    • Journal Title

      Journal of Chemometrics

      Volume: Vol.33, No.2 Issue: 2

    • DOI

      10.1002/cem.3092

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Fast classification of microplastics by hyphenated-Raman techniques2020

    • Author(s)
      T. Takahashi, Z. Liu, K. Bourdakos, T. Thevar, N. Burns, D. Lindsay, J. Watson, B. Thornton, and S. Mahajan
    • Organizer
      The XXVII International Conference on Raman Spectroscopy
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Comparison of region proposal methods for marine holograms2020

    • Author(s)
      Z. Liu, T. Takahashi, T. Thevar, D. Lindsay, N. Burns, J. Watson, and B. Thornton
    • Organizer
      Global OCEANS 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Shape-based image classification and identification system for digital holograms of marine particles and plankton2020

    • Author(s)
      Z. Liu and J. Watson
    • Organizer
      Global OCEANS 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of Elemental Technologies for Seafloor Mineral Processing of Seafloor Massive Sulfides2019

    • Author(s)
      Yasuharu Nakajima, Joji Yamamoto, Tomoko Takahashi, Blair Thornton, Yuta Yamabe, Gjergj Dodbiba & Toyohisa Fujita
    • Organizer
      OMAE 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Imaging techniques for surveys of gelatinous zooplankton: Holographs, shadowgraphs, laser scanning and 3D reconstructions2019

    • Author(s)
      Lindsay DJ, Hidaka M, Sangekar M, Nishikawa J,, Hopcroft RR, Thornton B, Yamamoto H, Kawahito Y.
    • Organizer
      9th Hydrozoan Society Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of in-situ LIBS and Raman spectroscopic analysers for exploration of deep-sea hydrothermal vent fields2018

    • Author(s)
      Takahashi, T., Yoshino, S., Takaya, Y., Nozaki, T., Ohki, T., Ohki, K., Sakka, T. & Thornton, B
    • Organizer
      SciX, USA
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of metal grade of ore particles in slurry using laser-induced breakdown spectroscopy2018

    • Author(s)
      Nakajima, Y., Yamamoto, J., Takahashi, T., Dodbiba, G., Thornton, B., Fujita, T.
    • Organizer
      OCEANS’18 Kobe, Kobe, Tokyo
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Remarks]

    • URL

      https://schmidtocean.org/artificial-intelligence-guides-rapid-data-driven-exploration/

    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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