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

利用 Ae 和 Tdr 方法开发木质材料在线质量控制系统

基本信息

批准号：
01860019
负责人：
FUSHITANI Masami
金额：
$ 2.82万
依托单位：
Tokyo University of Agriculture and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B).
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

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).

本研究的目的是开发林产品工厂的在线质量控制系统，以提高木材工程建筑部件和材料的可靠性。研究了木材、胶合板、木材胶粘剂等木质板材材料的验证检测方法，特别是声发射（AE）木材分级、胶合板、木材胶粘剂的无损检测以及时域反射法测定含水率。对这些试机进行了制作和测试，并对方法的实用性进行了评价。 1．使用AE轮式传感器的AE分级可以检测和评估强度降低的木材缺陷，例如节子和粗粒，并且比当前基于节子比的目视分级系统更可靠。 AE 分级还可以检测腐烂和检查。因此，通过使用 AE 结合更传统的 MOE 分类来检测木材中的缺陷，可以实现可靠的 AE 木材应力分级。 2. 生产两种类型的AE测试机，用于检查胶合板（900x100mm）和地板的缺陷。机器可以检测和评估电路板的分层情况。 3.开发了基于TDR法的木材含水率测量系统。它包括硬件（计算机、发生器和波形存储器）和软件（控制程序和波形分析程序）。