公开(公告)号：US20150247825A1

公开(公告)日：2015-09-03

申请号：US14066504

申请日：2013-10-29

申请人： James D. Logan ,  James R. Allen ,  Harry E. Moore ,  Dean A. Nelson ,  Timothy T. Meekhof ,  Peter A. Siebold ,  Ryan D. Baldwin ,  Jean M. Logan

发明人： James D. Logan ,  James R. Allen ,  Harry E. Moore ,  Dean A. Nelson ,  Timothy T. Meekhof ,  Peter A. Siebold ,  Ryan D. Baldwin ,  Jean M. Logan

IPC分类号： G01N29/04

CPC分类号： G01N29/045 ,  G01N29/07 ,  G01N2291/0238 ,  G01N2291/0258 ,  G01N2291/02818 ,  G01N2291/02827 ,  G01N2291/044

摘要： The present invention is a wood grading apparatus including a robust “push” solenoid as a hammer means for impacting a lumber specimen under test. A conventional solenoid coil with stationary magnetic iron pole pieces is combined with a bimetallic armature including a magnetic portion and a non-magnetic portion; said armature is of uniform cross section through the solenoid coil. A magnetic steel portion of said armature is fastened to a nonmagnetic steel portion thereof, whereby the magnetic field may act upon the magnetic portion of said armature and drive said nonmagnetic portion in an outward direction whereby impact or striking action is achieved. The present invention includes said solenoid in a wood grading apparatus whereby physical properties of wood are measured in a conveyor line setting and wood grading is affected by combining sonic velocity and density measurements to determine the modulus of elasticity of the wood object. Sonic velocity in the wood specimen is determined either by reverberation frequency or by rolling transducers that detect the leading edge of a stress wave initiated by said hammer means. A weight measurement means including a horizontal-axis roller lug conveyor chain and a leaf-spring suspension with a load cell means provides for improved accuracy in weight measurement for wood density calculation.

摘要翻译： 本发明是一种木材分级装置，其包括坚固的“推”螺线管，作为用于冲击待测试的木材试样的锤装置。 具有固定磁铁极片的常规电磁线圈与包括磁性部分和非磁性部分的双金属电枢组合; 所述电枢通过螺线管线圈具有均匀的横截面。 所述电枢的磁钢部分固定在其非磁性钢部分上，由此磁场可以作用在所述电枢的磁性部分上，并沿向外的方向驱动所述非磁性部分，从而实现冲击或打击动作。 本发明包括在木材分级装置中的所述螺线管，由此在传送线设置中测量木材的物理特性，并且通过组合声速和密度测量来影响木材分级以确定木材对象的弹性模量。 木材样本中的声速通过混响频率或通过滚动传感器确定，该换能器检测由所述锤装置发起的应力波的前缘。 包括横轴滚珠输送机链条和带有称重传感器装置的板簧悬架的重量测量装置提供用于提高木材密度计算的重量测量精度。

公开(公告)号：US09383341B2

公开(公告)日：2016-07-05

申请号：US14066504

申请日：2013-10-29

申请人： James D. Logan ,  James R. Allen ,  Harry E. Moore ,  Dean A. Nelson ,  Timothy T. Meekhof ,  Peter A. Siebold ,  Ryan D. Baldwin ,  Jean M. Logan

发明人： James D. Logan ,  James R. Allen ,  Harry E. Moore ,  Dean A. Nelson ,  Timothy T. Meekhof ,  Peter A. Siebold ,  Ryan D. Baldwin ,  Jean M. Logan

IPC分类号： G01N29/04 ,  G01N29/07

CPC分类号： G01N29/045 ,  G01N29/07 ,  G01N2291/0238 ,  G01N2291/0258 ,  G01N2291/02818 ,  G01N2291/02827 ,  G01N2291/044

摘要： The present invention is a wood grading apparatus including a robust “push” solenoid as a hammer means for impacting a lumber specimen under test. A conventional solenoid coil with stationary magnetic iron pole pieces is combined with a bimetallic armature including a magnetic portion and a non-magnetic portion; said armature is of uniform cross section through the solenoid coil. A magnetic steel portion of said armature is fastened to a nonmagnetic steel portion thereof, whereby the magnetic field may act upon the magnetic portion of said armature and drive said nonmagnetic portion in an outward direction whereby impact or striking action is achieved. The present invention includes said solenoid in a wood grading apparatus whereby physical properties of wood are measured in a conveyor line setting and wood grading is affected by combining sonic velocity and density measurements to determine the modulus of elasticity of the wood object. Sonic velocity in the wood specimen is determined either by reverberation frequency or by rolling transducers that detect the leading edge of a stress wave initiated by said hammer means. A weight measurement means including a horizontal-axis roller lug conveyor chain and a leaf-spring suspension with a load cell means provides for improved accuracy in weight measurement for wood density calculation.

摘要翻译： 本发明是一种木材分级装置，其包括坚固的“推”螺线管，作为用于冲击待测试的木材试样的锤装置。 具有固定磁铁极片的常规电磁线圈与包括磁性部分和非磁性部分的双金属电枢组合; 所述电枢通过螺线管线圈具有均匀的横截面。 所述电枢的磁钢部分固定在其非磁性钢部分上，由此磁场可以作用在所述电枢的磁性部分上，并沿向外的方向驱动所述非磁性部分，从而实现冲击或打击动作。 本发明包括在木材分级装置中的所述螺线管，由此在传送线设置中测量木材的物理特性，并且通过组合声速和密度测量来影响木材分级以确定木材对象的弹性模量。 木材样本中的声速通过混响频率或通过滚动传感器确定，该换能器检测由所述锤装置发起的应力波的前缘。 包括横轴滚珠输送机链条和带有称重传感器装置的板簧悬架的重量测量装置提供用于提高木材密度计算的重量测量精度。