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Development of Portable X-ray CT System I - Evaluation of Wood Density using X-ray Radiography -  

Kim, Kwang-Mo (Timber Engineering Lab., Major in Environmental Materials Science, Department of Forest Science, Seoul National University)
Lee, Sang-Joon (Timber Engineering Lab., Major in Environmental Materials Science, Department of Forest Science, Seoul National University)
Lee, Jun-Jae (Timber Engineering Lab., Major in Environmental Materials Science, Department of Forest Science, Seoul National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.34, no.1, 2006 , pp. 15-22 More about this Journal
Abstract
ln order to manage efficiently many ancient wooden buildings, which have been preserved as cultural properties in Korea, the internal state of wood members should be evaluated exactly and periodically by a NDE (non-destructive evaluation) method. A research project was planned to develop an X-ray CT (computed tomography) system as a NDE method for wood, which could be easily applied in field. This paper includes the first part of this project. First of all, to establish a measuring procedure of wood density using X-ray radiography, the correlation between X-ray intensity and the film brightness was evaluated. Also, initial X-ray intensity was quantified with various radiate conditions controlled by the tube voltage and tube current. And then, the effects of density, annual ring angle, and thickness on the mass attenuation coefficient of wood were examined. Finally, Beer's law was modified with the above results and adopted to calculate the density of wood. As a result of this study, the measuring procedure of wood density was established using a portable soft X-ray device and this procedure was verified with some small wood specimens. This results will he used valuably for the following researches to develop a portable X-ray CT system.
Keywords
X-ray radiography; wood density; beer's law; mass attenuation coefficient; X-ray CT; ancient wooden building; NDE(Non-destructive evaluation);
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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