Detection of decay damage in iron-wood living trees by nondestructive techniques

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• 作者：Cheng-Jung Lin ; Yue-Hsing Huang ; Gwo-Shyong Huang ; Meng-Ling Wu
• 关键词：Stress wave velocity ; Tree risk assessment ; Visual tree inspection ; Nondestructive technique ; Tomogram
• 刊名：Journal of Wood Science
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：62
• 期：1
• 页码：42-51
• 全文大小：1,361 KB
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• 作者单位：Cheng-Jung Lin (1)
  Yue-Hsing Huang (2)
  Gwo-Shyong Huang (1)
  Meng-Ling Wu (3)
  
  1. Forest Utilization Division, Taiwan Forestry Research Institute, 53 Nanhai Rd., Taipei, 10066, Taiwan
  2. Taiwan Forestry Research Institute, 53 Nanhai Rd., Taipei, 10066, Taiwan
  3. Forest Protection Division, Taiwan Forestry Research Institute, 53 Nanhai Rd., Taipei, 10066, Taiwan
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Wood Science and Technology
  Materials Science
  Characterization and Evaluation Materials
  
• 出版者：Springer Japan
• ISSN：1611-4663

文摘

The purpose of this study was to investigate the standard values of living, undamaged iron-wood (Casuarina equisetifolia) trees by different nondestructive techniques. This study also detects the transversal stress wave velocity (V) and tomogram, and resolves corresponding V maps of the trees with and without decay damage. First, a visual tree inspection form with seven categories of tree defects is proposed for tree hazard assessment. The range of demarcation between decay-damaged and sound wood occurred at an approximate V of 1461–1636 m/s by transversal stress wave velocity tomography. Different nondestructive evaluation parameters can serve as an index for diagnosing standard values (with or without decay). A positive significant relationship was found between the diameter and transversal minimum V of 2D in undamaged trees. Moreover, the product diameter × frequency of evaluated value by lateral impact vibration method tended to increase with increasing minimum V of 2D using tomography in undamaged and decay-damaged trees. Decay damage in iron-wood living trees could be inspected and detected by lateral impact vibration method and transversal stress wave velocity tomography for the general location and area of wood deterioration. Keywords Stress wave velocity Tree risk assessment Visual tree inspection Nondestructive technique Tomogram