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Scientia Silvae Sinicae ›› 2010, Vol. 46 ›› Issue (2): 122-127.doi: 10.11707/j.1001-7488.20100220

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A New X-Ray Scanning Method for Measuring the Internal Moisture Content in Wood Drying

Li Xianjun1,Cai Zhiyong2,Fu Feng3   

  1. 1.School of Material Science and Engineering, Central South University of Forestry and Technology Changsha 410004; 2.Forest Products Laboratory, USDA Forest Service Madison, WI 53726-2398; 3.Research Institute of Wood Industry, CAF Beijing 100091
  • Received:2009-06-02 Revised:1900-01-01 Online:2010-02-25 Published:2010-02-25

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Abstract:

Nondestructive X-ray scanning method was used to determine moisture content profile and mean moisture content of red oak (Quercus rubra) and walnut (Juglans nigra) samples during hot air drying. The moisture content measured by the nondestructive X-ray scanning method was compared with the corresponding ones measured by the traditional weighting method. It was found that the two methods were highly correlated with the correlation coefficient over 0.97. Within the range of moisture content between 8% and 68%, the maximum difference of measured moisture contents using the two methods was less than 3%. The result showed that the nondestructive X-ray scanning is a good method to continuously monitor moisture content profile and mean moisture content during wood drying, which could improve the drying efficiency and reduce the energy consumption.

Key words: X-ray scanning, moisture content, moisture content profile, wood drying