Abstract
Log moisture content (MC) has been determined based on the propagation velocity (PV) of ground penetrating radar (GPR) signals. This approach is based on measuring the travel time of the GPR signal through the log, from which its PV and the apparent log dielectric permittivity can be retrieved. Linear regression between the log dielectric permittivity and MC was established for each of the investigated wood species (quaking aspen, balsam poplar, and black spruce), log state (thawed and frozen), and direction of measurement [on the log cross-section (CS) and through the bark (TB)]. CS and TB measurements led to different results depending on the log state and wood species. Linear models with different slopes were found for thawed (slope=6.4–9.8) and frozen (slope=12–29) logs due to the difference in the dielectric properties of the frozen and unfrozen water in wood. The models for quaking aspen and balsam poplar were very similar to each other and differed from that of black spruce in terms of slopes and intercepts. Generally, the PV method leads to poorer log MC prediction accuracy than the partial least squares method presented in Part 1 of this study.
Acknowledgments
The authors wish to thank FPInnovations and Sensors & Software, Inc. for their support. We thank A. Haddadi and C. Lamason from the University of New Brunswick and K. Phung from the University of British Columbia for their help during the experiments. This work was supported by the Natural Sciences and Engineering Research Council of Canada (Strategic Grant STPGP 396789) and the New Brunswick Innovation Foundation (Research Technician Initiative Grant 2012-018).
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©2015 by De Gruyter
Articles in the same Issue
- Frontmatter
- Original Articles
- Cloning and expression of a sesquiterpene synthase gene from Taiwania cryptomerioides
- Stabilization, degradation, and dissolution behavior of Scots pine polysaccharides during polysulfide (K-PS) and polysulfide anthraquinone (K-PSAQ) pulping
- Swelling, viscoelastic, and anatomical studies on ionic liquid-swollen Norway spruce as a screening tool toward ionosolv pulping
- Synthesis and antifungal activity of dehydroabietic acid-based thiadiazole-phosphonates
- Nanofibrillation of TEMPO-oxidized bleached hardwood kraft cellulose at high solids content
- Free radical gelling reactions of lignosulfonates
- Preparation of electrode for electric double layer capacitor from electrospun lignin fibers
- Standard and non-standard deformation behaviour of European beech and Norway spruce during compression
- Determination of log moisture content using ground penetrating radar (GPR). Part 1. Partial least squares (PLS) method
- Determination of log moisture content using ground penetrating radar (GPR). Part 2. Propagation velocity (PV) method
- Improved method based on dual-energy X-ray absorptiometry for nondestructive evaluation of solid wood moisture content
- A comparative study of dewatering of Pinus radiata sapwood using supercritical CO2 and conventional forced air-drying via in situ magnetic resonance microimaging (MRI)
- Influence of exposure time, wood species and dimension on the remaining copper and chromium content in CC-treated wood after field and laboratory leaching tests
Articles in the same Issue
- Frontmatter
- Original Articles
- Cloning and expression of a sesquiterpene synthase gene from Taiwania cryptomerioides
- Stabilization, degradation, and dissolution behavior of Scots pine polysaccharides during polysulfide (K-PS) and polysulfide anthraquinone (K-PSAQ) pulping
- Swelling, viscoelastic, and anatomical studies on ionic liquid-swollen Norway spruce as a screening tool toward ionosolv pulping
- Synthesis and antifungal activity of dehydroabietic acid-based thiadiazole-phosphonates
- Nanofibrillation of TEMPO-oxidized bleached hardwood kraft cellulose at high solids content
- Free radical gelling reactions of lignosulfonates
- Preparation of electrode for electric double layer capacitor from electrospun lignin fibers
- Standard and non-standard deformation behaviour of European beech and Norway spruce during compression
- Determination of log moisture content using ground penetrating radar (GPR). Part 1. Partial least squares (PLS) method
- Determination of log moisture content using ground penetrating radar (GPR). Part 2. Propagation velocity (PV) method
- Improved method based on dual-energy X-ray absorptiometry for nondestructive evaluation of solid wood moisture content
- A comparative study of dewatering of Pinus radiata sapwood using supercritical CO2 and conventional forced air-drying via in situ magnetic resonance microimaging (MRI)
- Influence of exposure time, wood species and dimension on the remaining copper and chromium content in CC-treated wood after field and laboratory leaching tests