탄소 나노 지능형 복합 소재 기반 임팩트 센서 개발 연구

Abstract

This study presents a novel impact sensor which can be fabricated with smart paint made of graphene and mwcnt. This smart nano paint can be easily installed on structures using a spray-on technique and that can make the sensor low cost and practical. The impact sensor is fabricated with the smart nano paint having very sensitive piezoresistivity. The nano smart-paint can detect sufficient impact to cover the damaged energy range of the composite around 1~3J. The voltage outputs from the sprayed paints show fairly linear responses after signal processing. The impact makes deformation of the structure and it brings change of piezoresistivity of the paint and those converts into voltage output consequently by means of simple signal processing system. The nano smart paint is lightweight and easily applied to the structural surface, and there is no stress concentration. The nano smart paint is expected to be a cost effective and sensitive multi-functional sensor for composites and other damage monitoring applications in the field of structural health monitoring.