해양 구조물의 부식손상 검색을 위한 임피던스 기반 건전성 감시기술

Abstract

This paper proposes impedance-based structural health monitoring (SHM) techniques for detecting corrosion damage of offshore structures. Piezoelectric sensors that can serve as both actuators and sensors at the same time in a high frequency range (typically higher than 30 kHz) are utilized for impedance measurements. The feasibility of the proposed approach was verified throughout the laboratory testing using a simple aluminum beam specimen. Finally, the field test employing six Macro-fiber composite (MFC) sensors was carried out for a offshore structure currently under construction.