Abstract
To confirm the feasibility of applying THz time domain spectroscopy (TDS) technique to nondestructive evaluation (NDE) of wood, the relation of relative permittivity to density for specimens of 12 wood species was investigated using THz-TDS transmission measurement system. The dielectric anisotropy, the difference in the relative permittivity in the fiber and transverse direction of wood, was also examined. The relative permittivity increased with wood density. The relation between the anisotropy and density was concave downward. These findings indicate that THz-TDS technique can be applied to NDE of wood density and grain direction.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have