Abstract
Although quite a number of papers can be found up to now dealing with the subject of the measurement of wood density by using the X-ray exposure methods, direct scanning or radiographic photography, the following two aspects, which are very important from both theoretical and engineering application points of view, have not yet been properly handled. One is that the elementary analyses or the experimental measurement on the mass attenuation coefficients were not specified in regard to spectrum energy distridutions(1). In this connection, the ambiguities in the specification of the coeffiecients and in turn for the results among studies arise when only one of the two parameters, namely wave length and applied voltage, of defining the energy spectrum of X-ray is given. The other is that the relationships between the relative intensity and the sample thickness as well the wood moisture content(2), which are the critical factors for the design and the selection of X-ray apparatus, were not sufficiently examined. In addition, the knowledge of the measurement of wood miosture content by using the direct X-ray scanning method is also almost unavaible now. In the study, the direct X-ray scanning method of measuring wood moisture content was at first investigated theoretically with respect to the relationship between the mass attenuation coefficients of wood (beech,Fagus Sylvatica) and the maximum spectrum energy of X-ray. Secondly, the dependence of the relative intensity on the sample thickness and on the wood moisture content was analysed. The main advantage of the method is on-site nondestructive measuring of wood moisture content in the processes such as drying, impregnation and unsteady mass diffusion. Specifically for the application in the area of biomechanics, the method can also be used for understanding the water pathway within wood, for example, the water around the knots and the relation between the stress distribution and the local moisture content of wood.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
