公开(公告)号：US06598477B2

公开(公告)日：2003-07-29

申请号：US10002427

申请日：2001-10-31

申请人： Stanley L. Floyd

发明人： Stanley L. Floyd

IPC分类号： G01N3346

CPC分类号： G01N33/0098 ,  B27B1/007 ,  G01N33/46 ,  G01N2203/0405 ,  Y10T83/145 ,  Y10T83/527 ,  Y10T83/533 ,  Y10T83/543

摘要： A method of predicting warp of lumber that might be sawn from any given log is disclosed. The method involves measurement of stress wave velocity in the tree stem. A scan is then made to define the exterior geometric configuration of the log. In particular, measurements relating to lack of longitudinal axis linearity (sweep) or irregularity of cross sections of the log are important. Stress wave values and selected geometric parameters are entered into a multivariate regression equation to predict warp propensity of lumber that might be sawn from the log. The equations are originally derived by examination of a representative population of logs of the particular species and locale and measurement of warp in lumber sawn from the logs. Logs determined to produce warp prone lumber can be isolated and used to produce other products such as timbers or plywood where warp is not as critical.

摘要翻译： 公开了一种预测可能从任何给定日志中锯切的木材翘曲的方法。 该方法涉及测量树干中的应力波速度。 然后进行扫描以定义日志的外部几何配置。 特别是与日志的横截面的纵轴线性（扫描）的缺乏或不规则性有关的测量是重要的。 将应力波值和选定的几何参数输入到多元回归方程中，以预测可能从日志中锯出的木材的翘曲倾向。 方程式最初是通过检查特定种类和地区的代表性原木数量和从原木中锯切锯材的翘曲测量而得出的。 确定产生经向翘曲的木材的原木可以被隔离并用于生产其他产品，例如木材或胶合板，其中翘曲不那么关键。

公开(公告)号：US06293152B1

公开(公告)日：2001-09-25

申请号：US09389676

申请日：1999-09-02

申请人： Mark A. Stanish ,  Stan L. Floyd ,  Steven M. Cramer

发明人： Mark A. Stanish ,  Stan L. Floyd ,  Steven M. Cramer

IPC分类号： G01N3346

CPC分类号： G01N29/4418 ,  G01N29/07 ,  G01N29/42 ,  G01N33/46 ,  G01N2291/011 ,  G01N2291/0238 ,  G01N2291/048 ,  Y10T83/141 ,  Y10T83/145 ,  Y10T83/527 ,  Y10T83/533

摘要： A method for determining twist potential of wood is described. One embodiment of the method comprises nondestructively obtaining a grain angle of wood, such as trees or lumber, and then determining twist potential of the wood based on the grain angle. Where the wood comprises lumber, grain angle determinations typically are made on at least one major surface of the lumber. The method typically comprises determining grain angle at at least two measuring locations separated by a predetermined distance, such as at substantially one-foot intervals along the board. The method also can further comprise obtaining at least one fiber dive angle. Particular embodiments of the present invention determine grain angle using infrared radiation, microwave radiation, light energy (such as by using a laser), electricity, ultrasound energy, and combinations thereof. Working embodiments of the method used light energy and ultrasound energy to determine grain angle. For example, a first transmission speed of an ultrasound pulse through the board was determined along a first path and along a second path. Grain angle was then determined by comparing the first and second transmission speeds. Plural grain angles also can be determined using this ultrasound method. Twist potential can be correlated to empirically determined twist angle. The method of the present invention provides can determine twist potential that correlates with empirically determined twist potential with an R2 value of at least 0.50.

摘要翻译： 描述了确定木材扭转电位的方法。 该方法的一个实施例包括非破坏性地获得木材（例如树木或木材）的晶粒角度，然后基于晶粒角度确定木材的扭转电位。 在木材包括木材的情况下，通常在木材的至少一个主表面上进行晶粒角度测定。 该方法通常包括在至少两个测量位置处确定分隔一预定距离的晶粒角度，例如沿板的基本上一英尺的间隔。 该方法还可以进一步包括获得至少一个纤维潜水角。 本发明的具体实施例使用红外辐射，微波辐射，光能（例如通过使用激光），电力，超声能量及其组合来确定晶粒角度。 该方法的工作实施例使用光能和超声能量来确定晶粒角度。 例如，沿着第一路径和第二路径确定通过板的超声脉冲的第一传输速度。 然后通过比较第一和第二传输速度来确定晶粒角度。 也可以使用该超声波方法来确定多个晶粒角度。 扭转电位可以与经验确定的扭转角度相关。 本发明的方法可以确定与经验确定的扭转电位相关的扭转电位，R2值至少为0.50。