本研究應用管胞效應與自行架設之光學模組，開發一套光學非接觸式木材纖維量測系統，此系統藉由光學掃描方法掃描試片弦切面與徑切面以預測木材彈性模數(Modulus of Elasticity, MOE)，本研究同時探討試片橫切面晚材率對於預測木材MOE之影響。
本研究以木材纖維量測系統預測柳杉無節材與含節點試片之MOE，並以抗彎實驗量測試片之實驗MOE，由此驗證木材纖維量測系統預測MOE之正確性，結果顯示木材纖維量測系統預測MOE與抗彎實驗MOE有相同之趨勢，得以驗證本系統之正確性，突破以往使用接觸式方法量測木材MOE之限制，達到非接觸式方法預測木材MOE之目標。

In this thesis, an optical system was developed based on the tracheid effect and the self-constructed optical setup to measure the fiber orientation of timber. By using the developed optical system to scan both tangential and radial surfaces, both local and global modulus of elasticity (MOE) of timber can be predicted. Moreover, the measurement of proportion of latewood of the cross-section was used to investigate its effect of predicting MOE.
In this thesis, the specimens adopted were the clear wood and the wood with knot of Cryptomeria japonica to predict the MOE by the optical system. To verify the predicted MOE result, a bending test was also conducted to measure the MOE of specimens. The results show that local MOE profiles along longitudinal direction obtained from optical scanner and bending test have the same tread. In the past, almost all MOEs were determined by the contact method. By using the non-contact method of the optical system, the MOEs can be predicted successfully.

一、簡介------------------------------------------1
1.1 研究動機--------------------------------------1
1.2 研究目的--------------------------------------3
1.3 研究流程--------------------------------------3
二、文獻回顧--------------------------------------5
2.1 木材簡介--------------------------------------5
2.2 木材品質判定方法-------------------------------8
2.3 管胞效應--------------------------------------9
三、實驗原理--------------------------------------12
3.1橢圓方程式-------------------------------------12
3.2 木材彈性模數----------------------------------13
3.2.1平面內及平面外纖維角度與木材MOE之關係----------13
3.2.2 晚材率與木材彈性模數之關係-------------------20
3.2.3 平面內纖維角度與木材剛性之關係---------------23
3.2.4 局部彈性模數與全域彈性模數-------------------23
3.3抗彎機械應力分等-------------------------------25
四、實驗程序--------------------------------------29
4.1 木材纖維量測系統之研發-------------------------29
4.1.1 光源與相機選用程序---------------------------29
4.1.2 光學架設模組--------------------------------29
4.1.3 三軸位移平臺--------------------------------30
4.1.4 數位影像分析--------------------------------30
4.2 實驗樹種與樣本--------------------------------31
4.3 纖維方向檢測方法------------------------------31
4.3.1 平面內纖維角度檢測--------------------------32
4.3.2 平面外纖維角度檢測--------------------------32
4.4 實驗量測程序----------------------------------33
4.5靜態抗彎實驗程序-------------------------------35
五、結果與討論------------------------------------37
5.1 木材纖維量測系統開發--------------------------37
5.1.1 光源與相機選用------------------------------37
5.1.2 影像擷取與平臺位移程式----------------------38
5.1.3 數位影像分析結果----------------------------38
5.1.4 彈性模數計算程式----------------------------39
5.2 纖維角度檢測結果------------------------------39
5.2.1 平面內纖維角度檢測結果----------------------39
5.2.2 平面外纖維角度檢測結果----------------------40
5.3 橫切面之晚材率-------------------------------42
5.4 木材纖維量測系統掃描結果----------------------43
5.4.1 含兩節點試片木材纖維量測系統掃描結果---------43
5.4.2 無節材試片木材纖維量測系統掃描結果-----------45
5.4.3 單一節點試片木材纖維量測系統掃描結果---------46
5.5 靜態抗彎實驗結果-----------------------------47
5.5.1 含兩節點試片靜態抗彎實驗結果----------------47
5.5.2 無節材試片靜態抗彎實驗結果------------------48
5.5.3 單一節點試片靜態抗彎實驗結果----------------49
5.6 比較木材纖維量測系統掃描結果與靜態抗彎實驗結果--50
5.6.1 含兩節點試片掃描結果與抗彎實驗結果-----------50
5.6.2 無節材試片掃描結果與抗彎實驗結果-------------51
5.6.3 單一節點試片掃描結果與抗彎實驗結果-----------52
六、結論與未來展望--------------------------------53
6.1 結論-----------------------------------------53
6.2 未來展望-------------------------------------54
七、參考文獻-------------------------------------56

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