Non-destructive detection of insect attack in historically important wooden constructions.

对历史上重要的木结构建筑中的昆虫攻击进行无损检测。

基本信息

批准号：
11680162
负责人：
FUJII Yoshihisa
金额：
$ 1.41万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11680162/
关键词：
AE historical wooden constructions termite attack non-destructive evaluation insect attack

项目摘要

A case study on the non-destructive detection of termite attack using AE monitoring was carried out, by using a traditional Japanese farmer's house in Wakayama Prefecture and common family wooden houses. A portable AE sensor made of PVDF film was developed, which is specially designed for the wooden construction members of the houses. The performance of the sensor and the data transferring system using internet was investigated. The system consists of AE sensor, detector for amplification, filtering and discrimination, counter to count AE events (which was already developed in the research project in 1999), interface between the detector and on-site CPU (called event adapter), and the date transferring and control program for data management between on-site CPU and central control CPU (or Client CPU) using LAN or Internet, or telephones. The feasibility of the continuous AE monitoring system for the historically important wooden constructions, like shrines and temples, was investigated. The client can derive the data by accessing to the server by internet through PC or handy phones.Nine historically important wooden constructions were investigated. In the survey, the termite attack and other biological deterioration was inspected by visual inspections. At the same time, non-destructive detection of termite attack using AE monitoring was also carried out. The active termite attack was detected by AE monitoring. However some practical and technical problems were also found, whne the AE monitoring was applied.In the laboratory tests, the relationships between the relative humidity and the termite infestation was investigated.The above results were totally examined and the final reports was published.

以和歌山县的一处日本传统农舍和普通家庭木屋为对象，开展了利用AE监测无损检测白蚁侵害的案例研究。开发了一种由PVDF薄膜制成的便携式声发射传感器，专为房屋的木结构构件设计。研究了传感器的性能和使用互联网的数据传输系统。该系统由AE传感器、用于放大、过滤和辨别的探测器、用于计数AE事件的计数器（该计数器已在1999年的研究项目中开发）、探测器与现场CPU之间的接口（称为事件适配器）以及使用LAN或互联网或电话在现场CPU和中央控制CPU（或客户端CPU）之间进行数据管理的数据传输和控制程序。研究了神社和寺庙等具有重要历史意义的木结构建筑的连续AE监测系统的可行性。客户端可以通过PC或手机通过互联网访问服务器获取数据。对九个具有重要历史意义的木结构建筑进行了调查。调查中，通过目视检查白蚁侵袭和其他生物恶化情况。同时，还开展了利用AE监测对白蚁侵害进行无损检测。通过AE监测发现白蚁活动活跃。但在AE监测的应用中也发现了一些实际和技术问题。在实验室测试中，研究了相对湿度与白蚁侵扰之间的关系。对上述结果进行了全面检验，并发表了最终报告。