论文信息 - Air-coupled ultrasonic assessment of wood veneer.

Air-coupled ultrasonic assessment of wood veneer.

Air-coupled ultrasound (ACU) provides a tool to evaluate wood samples of small or moderate thickness (<30 mm) thereby avoiding direct contact or liquid coupling. Results of through-transmission ACU measurements on wood veneer samples and related products are reported with respect to a wide variety of quality aspects. Fluctuations in the averaged received signal levels appear to be correlated to the presence of natural or machine-induced thickness and density variations, flaws and grain damage, errors produced by the manufacturing process, insufficient bonding on a substrate, etc. In addition it is seen that the variability of the signal levels enables to distinguish between quarter and crown areas.

Erik Blomme | Tijl Cool | Pieter Lust | Dirk Bulcaen | Filip Declercq

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