基于单片机单板层积材弹性模量无损检测.pdf

研究与分析 林产工业 基于单片机的单板层积材弹性模量的无损检测木 肖 江杨建华撒潮 李黎 摘要： 笔者介绍了以AT89C5l单片机为核心，应用应力波法测量单板层积材的弹性模量；构建了由加速度传感器、信 号调理电路、峰值检测和保持电路、数字处理及显示电路、单片机等组成的测量系统，用以测定单板层积材的动态弹性模 量。将动态弹性模董试验数据与力学试验机所测静态弹性模量相比较，得出二者具有显著的相关性，相关系数达到0．9 以上。基于单片机的应力波法检测单板层积材的弹性模量，具有无损、设备简单、成本低，测量效率高等特点，适用于单 板层积材的实时在线检测，有较好的应用前景。 关键词：单片机；应力波；单板层积材；弹性模基 中图分类号：TS653．3文献标识码：A 文章编号：1001—5299(2009)05—0019—04 NondestructiVeofMOEofLVLBasedon Testing Single-chipMicrocomputer LILi XIAO YANGJian—huaSAChao Jiang of of (SchoolTechnologyBeijingForestryUniversity，Beijing100083，China) introducesthemeasureof modulusof LVL Abstract：This paper dynamic elasticity(MOE)ofbyusing stresswavemethodwithAT89C51 asthecore．Thestresswave measure— single—chipmicrocomputer velocity ment is oftheacceleration andholdcir- detector systemcomposed sensors，signalconditioningcircuit，peak and andSO the MOEdatewith cuits，digital circuit，microcomputer processingdisplay on．Comparingdynamic thestaticMOEtested mechanical authorsofthis findouttheformerhas method，the byusing testing paper sig— nificantrelevancewiththe thecorrelationcoefficientismorethan testresultsshowthatthe latter，and 0．9，The characteristicsofthe wavedetectionbase stress methodon