111 スマートワッシャ応用を目指した圧電振動発電の検討

概要

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Bolted joints are widely used in mechanical and architectural structures. However, many serious accidents occur because of loosening in bolted joints. The conventional methods of the bolt loosening inspection require the use of special measurement equipment and human operation. It is difficult to conduct inspections in dangerous places, such as atomic power plants, space stations and bridges. In this study, a smart washer was proposed to detect the bolt loosening without human involvement and to achieve continuous monitoring. The smart washer which consists of the flexible cantilever beam enables to detect bolt loosening by using self-sensing and actuation functions of piezoelectric material. The subject of this paper is the power supply system of the health monitoring by using the smart washer. Applying energy harvesting system by piezoelectric vibration is proposed in this paper. Experimentation was performed to evaluate the charge characteristic by piezoelectric vibration power generator. This paper describes some conditions of piezoelectric vibration power generation when the use of a smart washer on the bridge.
一般社団法人日本機械学会の論文
2011-09-05