Development of On-Line Quality Control System for Wood-Based Materials Utilizing Ae and Tdr Methods

本研究的目标是在森林产品工厂中开发在线质量控制系统，以提高木材工程的可靠性。木材面板材料的证明测试方法，如木材和木木，木材粘合剂是调查的，特别是使用声学发射（AE）的，非破坏性测试的木木和木粘合剂和动态内容的测量。这些试验机器是生产和测试的，以及估计方法的实际使用情况。AE分级使用AE轮式传感器可以检测和评估强度-减少光束的缺陷，例如knots和closs grin，而且它比基于当前视觉分级系统的knot比率更可靠。AE分级也可以检测到轮和检查。因此，可靠的AE编码器压力分级可以通过使用AE来检测与更多传统MOE分类连接的损坏。2.两种类型的AE测试机器生产了Plywood Board（900 x100 mm）和地板Board中的检测缺陷的目的。在董事会上，可以被机器探测到和评估。3.根据TDR方法开发的基于木材水分含量测量系统。它包括硬件（一台计算机、一台生成器和一个波形存储器）和软件（一个控制程序和一个波形分析程序）。

The aim of this research is development of on-line quality control systems in forest products factories in order to elevate the reliability of construction parts and materials for timber engineering. Methods of the proof testing of materials of woody panel, such as lumber and plywood, and wood adhesive were investigated, specially, grading of lumber by using acoustic emission (AE), nonーdestructive testing of plywood and wood adhesive and measurement of moisture content by using time domain reflectometry method. These trial machines were produced and tested, and the practical usefulness of the Methods were estimated.1. The AE grading using an AE wheeled sensor could detect and evaluate strength-reducing lumber defects such as knots and closs grain, and it is more reliable than the current visual grading system based on knot ratio. The AE grading could also detect rots and checks. Therefore, reliable AE lumber stress grading can be realized by using AE to detect defects in lumber in conjunction with the more traditional MOE classification. 2. Two types of AE testing machines were produced for the purpose of inspecting defects in plywood boards (900x100mm) and floor boards. Delamination in the boards could be detected and evaluated by the machines. 3. Wood moisture content measuring system based on TDR method was developed. It is including hardware (a computer, a generator and a wave memory) and software (a control program and a wave form analysis program).