Japanese

1999

Wavelet analysis of elastic wave in wood and its application to non-destructive evaluation

Wavelet transform (WT) is a novel method for a transient analysis of the frequency component in a signal. WT analysis was applied to the elastic wave propagating in wood and its feasibility as a non-destructive evaluation method was investigated.

Original waves Wavelet transform




Wavelet of simple signals
original waves wavelet transform



Influence of grain angle on the WT of elastic wave
propagating of wood		 WT of elastic wave propagating in wood
with an inner cavity of different diameter
influence of grain angle on the WT of elastic wave propagating of wood WT of elastic wave propagating in wood with an inner cavity of different diameter

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