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논문 기본 정보

자료유형
학술저널
저자정보
Lee, J.R. (Department of Aerospace Engineering and LANL-CBNU Engineering Institute Korea, Chonbuk National University) Park, C.Y. (Aeronautical Technology Directorate, Agency for Defense Development) Kong, C.W. (Structures and Materials Department, Korea Aerospace Research Institute)
저널정보
테크노프레스 Smart structures and systems Smart structures and systems 제11권 제2호
발행연도
2013.1
수록면
185 - 197 (13page)

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We developed a simultaneous strain measurement and damage detection technique using a pair of surface-mounted piezoelectric transducers and a fiber connecting them. This is a novel sensor configuration of the fiber acoustic wave (FAW) piezoelectric transducer. In this study, lead-zirconate-titanate (PZT) transducers are installed conventionally on a plate's surface, which is a technique used in many structural health monitoring studies. However, our PZTs are also connected with an optical fiber. A FAW and Lamb wave are simultaneously guided in the optical fiber and the structure, respectively. The dependency of the time-of-flight of the FAW on the applied strain is quantified for strain sensing. In our experimental results, the FAW exhibited excellent linear behavior and no hysteresis with respect to the change in strain. On the other hand, the well-known damage detection function of the surface-mounted PZT transducers was still available by monitoring the waveform change in the conventional Lamb wave ultrasonic path.

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