G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 29/14 (2006.01) F26B 25/22 (2006.01)
Patent
CA 2633499
The present invention relates to a method for the determination of the stresses occurring in wood when drying or being dried. With the method in accordance with the invention, electrodes (1) are used to generate an electric field in drying wood (2) in order to measure the electric complex spectrum using the impedance spectroscopy method while at the same time employing sensors (3) to measure acoustic emissions from drying wood and using the results for calculating the parameters required for determining the stress state existing in the wood and for monitoring and/or controlling the drying process.
L'invention concerne un procédé de détermination des tensions apparaissant dans le bois lors du séchage. Ce procédé utilise des électrodes (1) permettant de générer un champ électrique dans le bois (2) en cours de séchage afin de mesurer le spectre complexe électrique par une spectroscopie d'impédance. Ce procédé utilise simultanément des capteurs (3) permettant de mesurer les émissions acoustiques du bois en cours de séchage ainsi que les résultats obtenus pour calculer les paramètres requis afin de déterminer l'état de tension existant dans le bois et de surveiller et/ou de contrôler les procédés de séchage.
Lappalainen Reijo
Miettinen Pekka
Tiitta Markku
Kirby Eades Gale Baker
Korwensuun Konetehdas Oy
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