Daval Vincent, Pot Guillaume, Belkacemi Mohamed, Meriaudeau Fabrice, Collet Robert
Opt Express. 2015 Dec 28;23(26):33529-39. doi: 10.1364/OE.23.033529.
In this paper, a new approach to computing the deviation of wood grain is proposed. To do this, the thermal conduction properties of timber are used (higher conduction in the fiber direction). Exciting the surface of the wood with a laser and capturing the thermal conduction using a thermal camera, an ellipse can be observed. Using a method similar to the tracheid effect, it is possible to extract information from this ellipse, such as the slope of grain and the presence of knots. With this method it is therefore possible to extend the mechanical model (assessing the mechanical properties of timber) to take certain singularities into account. Using this approach, the slope of grain can be estimated for any wood species, either hardwood or softwood, which was not possible with the existing tracheid effect.
本文提出了一种计算木材纹理偏差的新方法。为此，利用了木材的热传导特性（纤维方向的传导率更高）。用激光激发木材表面并用热成像仪捕捉热传导情况，就可以观察到一个椭圆。采用一种类似于管胞效应的方法，能够从这个椭圆中提取诸如纹理斜率和节疤存在情况等信息。因此，通过这种方法可以扩展力学模型（评估木材的力学性能）以考虑某些奇点。使用这种方法，可以估算任何木材种类（硬木或软木）的纹理斜率，而这用现有的管胞效应是无法做到的。
