文献类型：期刊文献

英文题名：ACOUSTIC TOMOGRAPHY FOR DECAY DETECTION IN BLACK CHERRY TREES

作者：Wang, Xiping[1,2] Wiedenbeck, Jan[3] Liang, Shanqing[4]

第一作者：Wang, Xiping

通信作者：Wang, XP[1]

机构：[1]Univ Minnesota, Nat Resources Res Inst, Duluth, MN 55811 USA;[2]US Forest Serv, USDA, Forest Prod Lab, Madison, WI 53726 USA;[3]US Forest Serv, USDA, No Res Stn, Princeton, WV 24740 USA;[4]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2009

卷号：41

期号：2

起止页码：127-137

外文期刊名：WOOD AND FIBER SCIENCE

收录：;EI(收录号：20092112087443);Scopus(收录号：2-s2.0-65549126387);WOS:【SCI-EXPANDED(收录号:WOS:000265173600003)】；

基金：This project was funded through a cooperative research agreement between the Natural Resources Research Institute of the University of Minnesota Duluth and the USDA Forest Service Northern Research Station (06-JV-11242300-055). The financial Support from the USDA Forest Service Northern Research Station is gratefully acknowledged. We greatly appreciate Bruce Allison Tree Care, Inc. for providing the PiCUS (R) Sonic Tomograph tool and the Collins Pennsylvania Forest, Inc. for donating the tree samples for this research. We also thank the USDA Forest Products Laboratory and the Chinese Academy of Forestry for Supporting Mr. Shanqing Liang to participate in field and laboratory testing during his 4-month visit at FPL. Thanks also go to Mr. Douglas Rammer of the USDA Forest Products Laboratory for his assistance on generating 2D hardness maps using Matlab software.

语种：英文

外文关键词：Acoustic tomography; decay; defect; hardness; hardwood trees

摘要：This study investigated the potential of using acoustic tomography for detecting internal decay in high-value hardwood trees in the forest. Twelve black cherry (Prunus serotina) trees that had a wide range of physical characteristics were tested in a stand of second-growth hardwoods in Kane, PA, using a PiCUS (R) Sonic Tomograph tool. The trees were felled after the field test and a disc from each sampling height was cut and subjected to laboratory evaluations. It was found that acoustic tomography underestimates heartwood decay when it is the major structural defect in the trees. However, when all internal crack is present in the tree trunk, the acoustic tomography tends to overestimate the size of the defects. In the presence of ring shake in the cross-section, the acoustic shadows resemble the influence of both extensive heartwood decay and lateral cracks. These findings highlight the importance of determining the nature of structural defects when assessing hardwood trees using the acoustic tomography technique. Results from this study offer insights that may be used to improve the interpretation algorithm embedded in the tomography software.