한국소음진동공학회:학술대회논문집 (Proceedings of the Korean Society for Noise and Vibration Engineering Conference)
- 한국소음진동공학회 2002년도 추계학술대회논문집
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- Pages.630-635
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- 2002
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- 1598-2548(pISSN)
마그네토스트릭션 센서를 이용한 굽힘파의 비접촉 측정 및 이상 진단
Diagnosis and Non-contact Measurement of Bending Waves by Magnetosrictive Sensors
초록
This work is concerned with the damage size estimation by using propagating bending wave signals in a beam. For the accurate estimation, we apply the continuous wavelet transforms to the incident waves and the reflected waves from a small damage in a long cylindrical beam. In particular, we propose to use the ratio of the magnitude of the incident and reflected waves along the ridges in the wavelet-transformed time-frequency plane. This technique is applied to the signals measured by non-contact magnetostrictive sensors. Experimental results indicate that the present method using the magnetostrictive sensor can be quite effective for accurate damage size estimation with simple measurements.
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