| Project/Area Number |
24580250
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Wood science
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| Research Institution | Forestry and Forest Products Research Institute |
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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)
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| 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)
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| Co-Investigator(Renkei-kenkyūsha) |
YOSHIDA Takahisa 長野県林業総合センター, 所長 (00450825)
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| 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
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| 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)
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| 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 |
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| 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.
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