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Tree diagnostic system using acoustic emission measurement and ultrasonic computed tomography

Research Project

Project/Area Number 08556023
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 林学
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

WATANABE Naoaki  Tokyo Univ.of Agric and Technol.Fac.of Agric.Assist Prof., 農学部, 助手 (10143637)

Co-Investigator(Kenkyū-buntansha) KANIWA Masanori  Hibiya Amenis Co. Aeboric.Lab., Assist.Manger, 室長代理
IWAI Kunio  Showa Electronic Institute Co.Kanto Branch, Manager, 所長
SATO Keiichi  Tokyo Univ.of Agric and Technol.Fac.of Agric.Assoc Prof., 農学部, 助教授 (90178723)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥17,000,000 (Direct Cost: ¥17,000,000)
Fiscal Year 1998: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1997: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1996: ¥14,800,000 (Direct Cost: ¥14,800,000)
Keywordstree diagnosis / acoustic emission chracteristics / standing tree / ultrasonic computed tomography / non-destructive inspection / ultrasonic propagation characteristics / 音波伝播特性 / 超音波CTスキャナー / アコースティック・エミッション
Research Abstract

To diagnose tree health and evaluate hazard trees, acoustic emission(AE) detection in the xylem of shoot and stem and ultrasonic measurement were made on several tree species using same sensors at one time. The AE generation of the healthy seedlings in the control was concentrated at the initiation or maximum of the solar irradiance. Total AE generation in a day were different among species. Ring-porous wood species, such as Zelkova, Quercus and Fraxinus generated many AE counts, but diffuse porous wood species, Fagus generated few. While healthy seedlings scarcely generated any AE in a night and in rain, stressed ones often generated AE in dark. AE measurements of nine species during drying to death revealed that stressed seedlings were distinguished from healthy and wilted ones by AE pattern and quantity. So, AE monitoring can be used for watering management of seedlings and street trees.
Ultrasonic computed tomography(CT) scanning device was developed for internal decay detection using tone burst wave. Artificial cavity was detected up to 30cm logs in diameter. Ultrasonic propagation characteristics in wood was measured in the cross sectional direction. Ultrasonic pulse was transmitted most quickly in the radial direction passing through pith, when pulsar and sensor were set at the angle of 120-240゚ At other angle, pulse took the shortest course to sensor. These results improve CT program in data processing.

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (32 results)

All Other

All Publications (32 results)

  • [Publications] SATO, K.,: "Acoustic emission characteristics generated from seedling, adult tree and shoot culture of conifers." Progress in Acoustic Emisson.8. 344-348 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 渡部克彦: "AEを用いた樹木の水分通導変化の検出" 日林関東支論. 48回. 97-100 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 渡部克彦: "樹木中の水分通導量とAE発生の関係について" アコースティック・エミッション総合コンファレンス論文集. 11回. 21-26 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 永石憲道: "音波測定を用いた樹木内部欠陥診断" 樹木医学研究. 1(1). 35-42 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 牧野礼: "道管配列の異なる樹木のAE特性" 日林関東支論. 49回(印刷中). (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 牧野礼: "ケヤキ苗木の枯死過程におけるAE特性" 日林関東支論. 50回(印刷中). (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 渡辺直明: "腐朽部診断の方法と器機410-419 新樹木医の手引き" 日本緑化センター, 476 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] SATO,K.et al.: "Acoustic emission characteristics generated from seedling, adult tree and shoot culture of conifers" Progress in Acoustic Emission. 8. 344-348 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] WATANABE,K.et al: "AE-measurement for detection of water conduction in stem of living trees" Trans, Mtg.Kanto Br.Jpn.For.Soc.48. 97-100 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] WATANABE,K.et al.: "Relationship between AE characteristics and amount of water conducts in stem of living trees." Proc.Nat.Confer.Acoustic Emission. 11. 21-26 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] NAGAISHI,N.et al: "Detection of decay and cavity in standing trees by stress wave velocity measurement" J.Tree Health.1 (1). 35-42 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] MAKINO,R.et al: "Acoustic emission characteristics of different conducting system trees" Trans, Mtg.Kanto Br.Jpn.For.Soc.49 (in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] MAKINO,R.et al: "Acoustic emission characteristics of Zelkova serrata seedling in droughty condition" Trans, Mtg.Kanto Br.Jpn.For.Soc.50 (in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] WATANABE,N.: "Diagnostic methods and devices for detecting tree decay" New Manual for treedoctors. Jpn.Greenery Res.& Develop.Cent., Tokyo. 410-419 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] SATO,K.: "Acoustic emission characteristics generated from seedling,adult tree and shoot culture of conifers." Progress in Acoustic Emisson. 8. 344-348 (1996)

    • Related Report
      1998 Annual Research Report
  • [Publications] 渡部克彦: "AEを用いた樹木の水分通導変化の検出" 48回日林関東支論. 97-100 (1996)

    • Related Report
      1998 Annual Research Report
  • [Publications] 渡部克彦: "樹木中の水分通導量とAE発生の関係について" 11回アコースティック・エミッション総合コンファレンス論文集. 21-26 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] 永石憲道: "音波測定を用いた樹木内部欠陥診断" 樹木医学研究. 1(1). 35-42 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] 牧野礼: "道管配列の異なる樹木のAE特性" 49回日林関東支論. 印刷中.

    • Related Report
      1998 Annual Research Report
  • [Publications] 牧野礼: "ケヤキ苗木の枯死過程におけるAE特性" 50回日林関東支論. 印刷中.

    • Related Report
      1998 Annual Research Report
  • [Publications] 渡辺直明: "腐朽部診断の方法と器機 新樹木医の手引き" 日本緑化センター,

    • Related Report
      1998 Annual Research Report
  • [Publications] 永石 憲道: "音速測定を用いた樹木内部欠陥診断" 樹木医学研究. 1. 35-42 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 渡部 克彦: "樹木中の水分通導量とAE発生の関係について" 第11回アコースティック・エミッション総合コンファレンス論文集. 11. 21-26 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Keiichi SATO: "Acoustic Emission Characteristics Generated from seedling, adult tree and shoot culture of Conifers" Transactions of the Material Research Society of JAPAN. 20. 48-51 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 渡部 克彦: "AEを用いた樹木の水分通導変化の検出" 日本林学会 関東支部大会 発表論文集. 48. 97-100 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 牧野 礼: "導管配列の異なる樹木のAE特性" 日本林学会 関東支部大会 発表論文集. 49. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 渡辺 直明: "腐朽部診断の方法と器機「新・樹木医の手引」" 日本緑化センター, 476(410-419) (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] Keiichi SATO: "Acoustic Emission Characteristes Generated from Seedling,Adult tree and Shoot Culture of Conifers." Transactions of the Materials Research Society of JAPAN. 20. 48-51 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 佐藤敬一: "被爆クスノキのアコースティック・エミッション測定" 日本生気象学会誌. 33・3. s51-s51 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 佐藤敬一: "AEを用いて植物とコミュニケイション" コンピューター&エデュケーション(CIEC会誌). 1. 73-76 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 渡部克彦: "AEを用いた樹木の水分通導変化の検出" 日本林学会関東支部大会発表論文集. 48. 97-100 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 渡辺直明: "腐朽部診断の方法と機器「新・樹木医の手引」" 日本緑化センター, 476(410-419) (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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