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Development of the monitoring method of moisture content of piled timbers in a kiln

Research Project

Project/Area Number 24580250
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Wood science
Research InstitutionForestry and Forest Products Research Institute

Principal Investigator

SUZUKI Youki  独立行政法人森林総合研究所, 木材特性研究領域, 室長 (90353739)

Co-Investigator(Kenkyū-buntansha) KOBAYASHI Isao  独立行政法人森林総合研究所, 加工技術研究領域, 室長 (30353684)
IKEDA Kiyohiko  静岡県農林技術研究所, 森林・林業研究センター, 科長 (40502571)
Co-Investigator(Renkei-kenkyūsha) YOSHIDA Takahisa  長野県林業総合センター, 所長 (00450825)
Research Collaborator 池田 元吉  熊本県林業指導所, 部長
祖父江 信夫  静岡大学, 名誉教授
Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsインピーダンス / 含水率 / 高周波 / パルス波 / 製材 / 桟積み / 桟積み製材 / 乾燥 / 製材品 / 非破壊的評価
Outline of Final Research Achievements

Methods for estimating the moisture content of wood have been developed using electrical techniques. Sawing timbers have variable density and moisture content, which leads to insufficient drying of final wood products. Therefore, a technique for monitoring moisture content is crucial for estimating the drying schedule and energy efficiency during kiln drying. We applied an impedance analysis to estimate water distribution using electrical impedance spectroscopy; introduced an electric network model using three series elements of resistance, capacitance, and parallel elements; and calculated Bode-plot curves which were in good agreement with the experimental curves. First, we measured the impedance and phase angle of piled green timbers in a dry-kiln using two parallel electrodes placed between timbers. Further, we separately estimated the resistance and capacitance of water and timber, respectively, using a ladder circuit to model the piled timbers.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (7 results)

All 2015 2014 2013 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (6 results)

  • [Journal Article] 人工乾燥過程における木材の水分量測定-電気的手法を用いた測定-2014

    • Author(s)
      鈴木養樹
    • Journal Title

      木材工業

      Volume: 69 Pages: 410-413

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Presentation] Monitoring the moisture content of piled timbers using impedance models2015

    • Author(s)
      Youki Suzuki(鈴木養樹)、 Kiyohiko Ikeda(池田潔彦)、 Nobuo Sobue(祖父江信夫)、 Takahisa Yoshida(吉田孝久)、 Motoyoshi Ikeda(池田元吉)、 Isao Kobayashi(小林功)
    • Organizer
      IAWPS2015
    • Place of Presentation
      船堀タワー(東京都)
    • Year and Date
      2015-03-16
    • Related Report
      2014 Annual Research Report
  • [Presentation] Monitoring of the moisture content of piled timbers in a kiln during the drying process using impedance models2013

    • Author(s)
      Youki Suzuki, Kiyohiko Ikeda, Nobuo Sobue, Takahisa Yoshida, Motoyoshi Ikeda, Isao Kobayashi
    • Organizer
      10th international conference on electromagnetic wave interaction with water and moist substances
    • Place of Presentation
      Weimar, Germany
    • Related Report
      2013 Research-status Report
  • [Presentation] パルス波による桟積み製材の水分量検出の試み2013

    • Author(s)
      鈴木養樹、池田潔彦、吉田孝久、池田元吉、祖父江信夫、小林功
    • Organizer
      日本木材加工技術協会第31回年次大会
    • Place of Presentation
      静岡県男女共同参画センター(静岡市)
    • Related Report
      2013 Research-status Report
  • [Presentation] 桟木を使った木材含水率測定技術2013

    • Author(s)
      鈴木養樹
    • Organizer
      第64回日本木材学会・木材と水研究会講演
    • Place of Presentation
      愛媛大学(松山市)
    • Related Report
      2013 Research-status Report
  • [Presentation] Evaluation of high moisture content of Japanese cedar(Cryptmeria Japonica) log using the phase detector of electromagnetic wave transmitter2013

    • Author(s)
      Kiyohiko Ikeda, Takeshi Hoshikawa, Jun Watai, Youki Suzuki, Nobuo Sobue, Akihiro Sugiyama
    • Organizer
      18th International Nondestructive Testing and Evaluation of Wood Symposium
    • Place of Presentation
      Madison, USA
    • Related Report
      2013 Research-status Report
  • [Presentation] マイクロ波域の位相を応用した原木水分量評価手法の開発

    • Author(s)
      鈴木養樹ら
    • Organizer
      日本木材学会大会
    • Place of Presentation
      岩手大学(岩手県盛岡市)
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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