한국조명전기설비학회:학술대회논문집 (Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference)
- 한국조명전기설비학회 2004년도 학술대회 논문집
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- Pages.359-364
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- 2004
COMPARISON OF SIGNAL PROCESSING TECHNIQUES FOR UT-NDE ON NUCLEAR POWER PLANTS
- Lee, Young-Seock (Dept. of electronics, Chungwoon University) ;
- Kim, Se-Dong (Electrical Eng., Doowon Technical College)
- 발행 : 2004.11.03
초록
This paper deals with the comparison of signal processing techniques of ultrasonic data. The goal of signal processing is the ultrasonic speckle suppression and the visibility enhancement of flaw-reflected ultrasonic echo. The performance of conventional SSP(split spectrum processing) method and the wavelet denoising method are compared and discussed for tested ultrasonic data. Tested ultrasonic data obtained from the weld area of centrifugal-casted stainless steel material and safe-ending material with holes and notch of variable depths are presented. In experimental results, the outputs of wavelet-based denoising method show the clear and sharp peaks at the positions of flaw-reflected echos comparing with those of SSP method.
키워드