查詢結果分析
相關文獻
- Stress Wave Tomography for the Quantification of Artificial Hole Detection in Camphor Trees (Cinnamomum camphora)
- 應力波檢測技術應用於樟木圓盤內部孔洞之評估
- Detection and Evaluation of Termite Damage in Norfolk Island Pine (Araucaria heteaophylla) Trees by Nondestructive Techniques
- Comparison of Time Domain BEM for 2D Elastodynamic
- 樟葉蜂 (Mesoneura rufonota (Rohwer))形態及生活史之觀察
- 應用簡單幾何形狀試片之側壁回波量測材料常數
- 高含油量品系樟樹之選育與推廣
- 以應力波技術檢測鋼筋混凝土結構之裂縫
- 杉木粒片板與工廠廢料粒片板之性質比較
- 模擬酸雨對杉木及樟樹苗木生長與養分淋溶之影響
頁籤選單縮合
題 名 | Stress Wave Tomography for the Quantification of Artificial Hole Detection in Camphor Trees (Cinnamomum camphora)=應用波斷層影像技術定量評估樟樹人造孔洞之研究 |
---|---|
作 者 | 林振榮; 張東柱; 阮名揚; 林達德; 曾家琳; 王亞男; 蔡明哲; | 書刊名 | 臺灣林業科學 |
卷 期 | 26:1 2011.03[民100.03] |
頁 次 | 頁17-32 |
分類號 | 436.18 |
關鍵詞 | 應力波; 斷層影像技術; 非破壞性評估; 樟樹; Stress wave; Tomographic technique; Nondestructive evaluation; Cinnamomum camphora; |
語 文 | 英文(English) |
中文摘要 | 本研究的目的是應用應力波斷層影像技術評估樟樹圓盤在不同大小的人造孔洞的影像反應,評估非破壞性參數與孔洞大小的關係,以瞭解非破壞性技術檢測孔洞的準確性,結果顯示徑向應力波速度與殘餘圓盤直徑比率之間有顯著的正相關性存在,而徑向應力波速度與相對應力波速度降低率之間有顯著的負相關性存在,當人造孔洞面積佔有圓盤橫斷面面積2.3%以上時,解析出的二維斷層影像圖中之孔洞及健全材質位置可以明顯的區別,因此,斷層影像法可以檢測樹木中的孔洞大小及相對位置,將圓盤橫斷面切成不同小區塊,其木材密度與影像解析的橫向應力波速度之間有顯著的正相關性存在,檢測不同含水率對應力波速度的影響,在纖維飽和點以上時應力波速度隨著含水率的增加而有降低的傾向,由斷層影像解析實驗的結果可以提供現場樹木橫斷面二維斷層影像解析的重要資訊。 |
英文摘要 | The purpose of this study was to evaluate defects/holes in trees using a stress wave tomographic technique. Results revealed that there was a significant positive relationship of the residual disc diameter ratio with the stress wave velocity, and a negative relationship with a reduction in the corresponding stress wave velocity in the virtual radial direction. A difference in the mapped color and stress wave velocity between the hole area and its surrounding sound area was obvious, and when the ratio of the hole area to the cross-sectional area exceeded 2.3%, the hole was detectable by tomography. A significant positive relationship between wood density and stress wave velocity of the transverse section was found in this study. Moreover, above the fiber saturation point, stress wave velocities tended to decrease with increasing moisture contents using tomography. Experimental results could provide some vital information for detecting defect locations and sizes in trunk cross-sections. |
本系統中英文摘要資訊取自各篇刊載內容。