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Presentation of the Efficient Leakage Detection by the Measurement of Indirect Media-Propagated AE Signal  

이성재 (부산대학교 대학원 정밀기계공학과)
김전하 (㈜테크노라이)
강명창 (부산대학교 정밀정형 및 금형가공 연구)
김정석 (부산대학교 기계공학부)
Publication Information
Journal of the Korean Society for Precision Engineering / v.21, no.9, 2004 , pp. 63-68 More about this Journal
Abstract
The high pressure vessels that are constructed by welding process have many welding lines and most of the leakage defects are occurred on these welding lines. The acoustic emission(AE) technique has adopted to detect the defect location and leakage on welding parts, but the AE signal in leakage are incomplete due to the attenuation, reiteration, instability and limit of defect size. To overcome these troubles, the experiments in this study are conducted to measure the indirect media-propagated AE signal perpendicular to the leakage hole. The AE signals that are acquired from the direct and indirect media are analyzed, and the reliability of the indirect media-propagated AE signal are examined experimentally. By AE signal investigation, this method can be adopted to detect efficiently the leakage in welding parts.
Keywords
Acoustic Emission; Pressure vessel; Leakage; Welding defect;
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