Acoustic Tomography for Decay Detection in Black Cherry Trees

Authors

  • Xiping Wang
  • Jan Wiedenbeck
  • Shanqing Liang

Keywords:

Acoustic tomography, decay, defect, hardness, hardwood trees

Abstract

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® 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 an 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.

References

Allegheny National Forest (2002) Master interpretive plan. USDA Forest Service. Eastern Region. 15 pp.nArgus Electronic Gmbh (2006) PiCUS® Sonic Tomograph manual. Rostock, Germany.nASTM (2005) Standard methods of testing small clear specimens of timber. D 143-94. American Society for Testing and Materials, West Conshohocken, PA.nBucur V (2003) Nondestructive characterization and imaging of wood. Springer-Verlag, Berlin, Heidelberg, Germany. 354 pp.nGilbert EA, Smiley ET (2004) PiCUS Sonic Tomography for the quantification of decay in white oak (Quercus Alba) and hickory (Carya spp.). J Arboric 30(5):277 - 280.nNicolotti G, Socco LV, Martinis R, Godio A, Sambuelli L (2003) Application and comparison of three tomographic techniques for detection of decay in trees. J Arboric 29:66 - 78.nTainter FH, Baker FA (1996) Principles of forest pathology. John Wiley & Sons, New York, NY. 803 pp.nWang X, Wiedenbeck J, Ross RJ, Forsman JW, Erickson JR, Pilon C, Brashaw BK (2005) Nondestructive evaluation of incipient decay in hardwood logs. Gen. Tech. Rep. FPL-GTR-162. USDA Forest Service, Forest Products Laboratory. 11 pp.nWang X, Allison RB, Wang L, and Ross RJ (2007a) Acoustic tomography for decay detection in red oak trees. Research Paper FPL-RP-642. USDA Forest Service, Forest Products Laboratory, Madison, WI. 7 pp.nWang X, Allison RB (2007b) Decay detection in red oak trees using a combination of visual inspection, acoustic testing, and resistance microdrilling. J Arboric Urban For 34(1):1 - 4.nWiedenbeck J, Wiemann M, Alderman D, Baumgras J, Luppold W (2004) Defining hardwood veneer log quality attribute. Gen. Tech. Rep. NE-313. USDA Forest Service, Northeastern Research Station. 36 pp.n

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Published

2009-04-13

Issue

Number 2 / April 2009

Section

Research Contributions

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