한국소음진동공학회:학술대회논문집 (Proceedings of the Korean Society for Noise and Vibration Engineering Conference)
- 한국소음진동공학회 2004년도 추계학술대회논문집
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- Pages.615-618
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- 2004
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- 1598-2548(pISSN)
유도 초음파 이용 결함 진단을 위한 정합추적 기법
Matching Pursuit Approach for Guided Wave-Based Damage Inspection
- 발행 : 2004.11.01
초록
For successful guided-wave damage inspection, the appropriate signal processing of measured wave signals is very important. The objective of this paper is to introduce an efficient signal processing technique especially suitable for the guided-waves used for damage detection. The key idea of this technique is to model guided-waves by chirp functions of special form considering the dispersion phenomenon. To determine the parameter of the chirp functions simulating guided-waves, the matching pursuit algorithm is employed. The damage information in waveguides can be extracted by pulse-characterizing parameters. The effectiveness of present method is checked with the longitudinal wave-based damage inspection.
키워드