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介绍弹性波层析成像技术应用于活立木内部缺陷检测的研究现状,阐述弹性波的产生、传播途径和成像原理,总结该技术在应用中出现的问题。并使用弹性波层析成像技术对美国林务局纳西比特营地脂松活立木进行检测。结果表明:弹性波层析成像技术能够模拟出不规则树干形状并以二维图像方式直观地显示立木腐朽部位、程度、大小及形状等情况。基于此方法发展的设备,具有检测方便、有效、实用性强等特点。
This paper introduces the research status of elastic wave tomography applied to the detection of internal defects in living wood, describes the generation, transmission and imaging principle of elastic waves, and summarizes the problems in the application of this technology. The elastic forest tomography technique was used to test the pine wood standing in Naxi Bide camp of US Forest Service. The results show that elastic wave tomography can simulate the irregular trunk shape and display the decayed site, extent, size and shape of the standing tree visually in two-dimensional images. Based on this method of development of equipment, with easy detection, effective, practical and so on.