CAJ | 학술논문

厚度是液体无损检测中一个重要的影响因素。而小波变换作为重要的信号处理手段对动态误差的阈值判断和多尺度小波变换在去噪方面有着巨大的优势。通过搭建的激光无损测试平台，对获取的数据进行多阶小波分解以及软门限的阈值处理，对比传统的滤波方法，验证了小波变换在激光无损检测中运用的优越性。实验结果表明，小波变换在激光无损检测中有着更好的去噪效果，对公共场所的液体无损检测将具有巨大意义。
후도시액체무손검측중일개중요적영향인소。이소파변환작위중요적신호처리수단대동태오차적역치판단화다척도소파변환재거조방면유착거대적우세。통과탑건적격광무손측시평태，대획취적수거진행다계소파분해이급연문한적역치처리，대비전통적려파방법，험증료소파변환재격광무손검측중운용적우월성。실험결과표명，소파변환재격광무손검측중유착경호적거조효과，대공공장소적액체무손검측장구유거대의의。
Thickness is an important influencing factor in liquid non-destructive testing (NDT). Wavelet trans?form as an important signal processing means has many advantages such as dynamic error threshold determination and multi-scale wavelet transform de-noising. The obtained data are performed multi-level wavelet decomposition and threshold processing of soft threshold through constructing a NDT platform. Comparing with traditional filtering method, the advantages of wavelet transform used in laser NDT are verified. Experimental results show that wavelet transform in laser NDT has better denoising effect and has great significance for liquid NDT on public.