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2023 Fiscal Year Final Research Report

Visualization of Moisture Distribution and Development of AI and Simulation Technologies in the Wood Drying Process

Research Project

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Project/Area Number 22K14926
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 40020:Wood science-related
Research InstitutionNagoya University

Principal Investigator

Ma Te  名古屋大学, 生命農学研究科, 特任講師 (70824316)

Project Period (FY) 2022-04-01 – 2024-03-31
Keywords木材乾燥 / NIR-HSI法 / X線CT法 / 有限要素法 / AI学習 / 3次元シミュレーション技術の開発
Outline of Final Research Achievements

In this study, we successfully constructed a highly reproducible wood drying model by adjusting parameters based on the visualization results of moisture distribution within the wood obtained using near-infrared hyperspectral imaging (NIR-HSI) method. The model confirmed two main characteristics consistent with actual measurements: (i) areas with higher density dried at a slower rate, and (ii) the surface layer of the wood sample appeared a significant gradient as dehydration progresses. Additionally, we successfully simulated moisture movement in wood using X-ray micro-CT images. By applying finite element methods and AI learning to the moisture distribution information obtained by NIR-HSI and the deformation information of the wood obtained by X-ray CT, we also succeeded in constructing a crack prediction model.

Free Research Field

木質科学、応用分光学、農業情報工学

Academic Significance and Societal Importance of the Research Achievements

木材乾燥過程における水分移動メカニズムは非常に複雑であり、自由水・結合水移動にともなう含水率変化に起因する変形、割れなどの材料特性変化の解明には、高い空間分解能で迅速に材内の水分分布を測定できる手法の開発が重要である。本研究では、近赤外ハイパースペクトラルイメージング(NIR-HIS)法よって得られた材内の水の分布情報、およびDIC法やX線CT法によって得られた材の変形情報に、有限要素法やAI学習などを適用して、木材の乾燥過程における3次元水の分布および材の変形を正しくシミュレーションできた。これにより、含水率の変動による材の割れ発生メカニズムの解明や、最適な乾燥条件確立が期待できる。

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Published: 2025-01-30  

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