| 摘要 |
<p>The method involves exciting a piece of wood (3) to generate mechanical vibrations, and detecting a vibratory and/or acoustic response of the wood in response to the excitation. The dimension and mass of the wood are measured to determine its density, and frequency bands of a frequency spectrum of detected acoustic response are analyzed. Young's modulus of the wood is determined from the density and the frequency band analysis, and a possible defect in the wood is determined from the analysis. A modulus of rupture of the wood is determined from the Young's modulus of the piece of the wood. An independent claim is also included for a device for non-destructive determination of modulus of rupture of a piece of wood, comprising an impactor.</p> |
