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Nondestructive evaluation for wood quality and water conductivity of major plantation species in Japan with the developed CT X-ray inspection

Research Project

Project/Area Number 17H03847
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Wood science
Research InstitutionKyushu University

Principal Investigator

Koga Shinya  九州大学, 農学研究院, 教授 (20215213)

Co-Investigator(Kenkyū-buntansha) 内海 泰弘  九州大学, 農学研究院, 准教授 (50346839)
鈴木 良一  国立研究開発法人産業技術総合研究所, 計量標準総合センター, 首席研究員 (80357300)
加藤 英俊  国立研究開発法人産業技術総合研究所, 計量標準総合センター, 研究グループ付 (60583747)
藤原 健  国立研究開発法人産業技術総合研究所, 計量標準総合センター, 主任研究員 (90552175)
池田 武文  京都府立大学, 生命環境科学研究科, 教授 (50183158)
岡野 哲郎  信州大学, 学術研究院農学系, 教授 (00194374)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2017: ¥12,610,000 (Direct Cost: ¥9,700,000、Indirect Cost: ¥2,910,000)
Keywords非破壊 / 超小型X線源 / X線CT法 / 生立木 / 年輪 / 水分分布 / 材密度分布 / 欠点 / X線CT画像 / 材質 / 水分生理 / 野外 / X線
Outline of Final Research Achievements

We are developing a non-destructive X-ray CT wood quality inspection system for standing trees in the field. During this research period, a new prototype was manufactured and improved, and 3D-CT images of the stems of four coniferous trees and five broad-leaved trees were obtained with the prototype. Higher-quality images were obtained than those from fist prototype. We confirm that the difference in moisture content between heartwood and sapwood, location of the decay and the knots, growth rings in the heartwood, and location of the cavitation can be clearly extracted in coniferous trees. On the other hand, we confirm that it is difficult to distinguish heartwood and sapwood, and extraction of growth rings, and tension wood can be extracted in some species. These depend on the species. It is necessary to further study the optimum detection conditions suitable for the target tree species and characteristics of wood.

Academic Significance and Societal Importance of the Research Achievements

立木用非破壊X線CT検査装置の開発を進めている.本研究期間に試作機を製作し,安全性が確保された実験室内において,その装置を用いスギやヒノキなどの針葉樹4種とクリなどの広葉樹5種の幹にX線を照射し,3次元CT画像を得た.得られた画像から節,腐朽の位置が明瞭に把握できること,針葉樹では幹内の水の分布や中心部付近の年輪等が明瞭に判別できること,広葉樹では水の分布や木材の密度分布の判別が容易な樹種とそうでない樹種があり,樹種ごとに撮影条件をかえる必要があることが分かった.現在のところ,野外の立木を非破壊で診断・検査できるX線CT装置は存在しない.引き続き実用化に向け,開発研究を進めていく予定である.

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (5 results)

All 2019 2018 2017

All Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] Development of a portable X-ray CT device for nondestructive inspection of standing trees.2019

    • Author(s)
      Shinya Koga, Ryouichi Suzuki, Takeshi Fujiwara, Hidetoshi Kato, Tetsuo Okano, Yasuhiro Utsumi, Takefumi Ikeda
    • Organizer
      21st International Nondestructive Testing and Evaluation of Wood Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 超小型X線源を用いた立木用X線CT検査装置の開発(Ⅱ)2019

    • Author(s)
      古賀信也、内海泰弘、鈴木良一、藤原 健、加藤英俊、岡野哲郎、池田武文
    • Organizer
      第69回日本木材学会大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 超小型X線源を用いた立木用X線CT検査装置の開発2018

    • Author(s)
      古賀信也,内海泰弘,鈴木良一,加藤英俊,藤原 健,岡野哲郎,池田武文
    • Organizer
      第129回日本森林学会大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 絵かき虫が潜入した葉の組織解剖特性2017

    • Author(s)
      池田武文,薬師川穂、大島一正、加藤秀俊、藤原健、米田稔
    • Organizer
      日本植物学会第81回大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Xylem dysfunction in pine trees suffered from pine wilt disease2017

    • Author(s)
      Takefumi Ikeda
    • Organizer
      IUFRO 125th Anniversary Congress
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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