Composite Structure Damage Detection Using FBG Sensor and Reference Database Algorithm = 광섬유 브래그 격자 센서와 레퍼런스 데이터베이스 알고리즘을 이용한 복합재 구조물의 손상 검출

다국어 초록 (Multilingual Abstract)

Continuous structural health monitoring (SHM) instead of conventional non-destructive inspection (NDI) of the composite structure is needed to detect and localize low velocity impacts which can cause barely visible impact damages (BVID). Furthermore, SHM system to identify occurrence of damage due to such low velocity impact is highly desirable. In this paper, damage detection on composite plate is investigated using fiber Bragg grating (FBG) sensors. A high speed FBG interrogator is used to sample the response signals from the FBG sensor at 100 kHz and a damage detection algorithm based on similarity comparing reference database method is used for identifying undamaged or damaged state of the composite specimen. Moreover, through the present study it is demonstrated that FBG sensors together with reference database algorithm are suitable not only for localizing the impact location on the composite specimen but also for detecting damage on the composite specimen.

목차 (Table of Contents)

• ABSTRACT
• 1. Introduction
• 2. Principle
• 3. Damage Detection
• 4. Conclusion
• References