著者

近藤 司 清水 つばき

出版者

函館工業高等専門学校

雑誌

函館工業高等専門学校紀要 (ISSN:02865491)

巻号頁・発行日

vol.49, pp.7-12, 2015

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A lot of structures, such as a bridge, a tunnel, an expressway and a steel tower, which give the damage to the society by the destruction exist in this country. The safety inspection of the bolt used for those joining part is the work on which a lot of time is spent and is high-cost. The sensor which could easily visualize a destruction risk was developed by this study. The sensor consists of the first material, the second material and spring. The second material is installed for the first material in parallel, and one end is fixed. The second material has a fragile characteristic than the first material, under the elastic deformation or plastic deformation. When a joining part is deformed by external force, the first material also is deformed. Then, the second material breaks and jumps out by the spring force to outside. Therefore the destruction risk of the junction can be visualized. The destruction detection system was developed by converting an electrical signal by a switch with the signal that the second material protruded. The break of the second materials was able to be confirmed as electrical signal by a simple experiment.