Reference wavelets used for deconvolution of ultrasonic time-of-flight diffraction (ToFD) signals

机译：用于超声飞行时间衍射（ToFD）信号反卷积的参考小波

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One major disadvantage of ultrasonic time-of-flight diffraction (ToFD) technique is the weakness of echoes which are diffracted from crack tips. This shortcoming, to some extent, can be overcome by application of proper signal processing techniques. Deconvolution techniques have shown to be quite effective for this purpose. A deconvolution process needs to use a reference wavelet in order to extract the required information from the signal. Accordingly, one of the major challenges in using deconvolution techniques is the choice of the reference wavelet. This paper discusses some of the problems encountered in the selection of the reference wavelet and proposes methods to overcome these problems. The angle-dependent deconvolution technique is one of these methods in which the reference wavelet used for processing each part of the signal is different from wavelets used for other parts. The principles of this method are described and its effectiveness is demonstrated by both simulation and experiment.

机译：超声飞行时间衍射（ToFD）技术的一个主要缺点是从裂纹尖端衍射回波的弱点。通过应用适当的信号处理技术可以在某种程度上克服这一缺点。反卷积技术已证明对于此目的非常有效。去卷积处理需要使用参考小波，以便从信号中提取所需的信息。因此，使用反卷积技术的主要挑战之一是参考小波的选择。本文讨论了参考小波选择中遇到的一些问题，并提出了克服这些问题的方法。依赖于角度的反卷积技术是这些方法之一，其中用于处理信号各部分的参考小波不同于用于其他部分的小波。描述了该方法的原理，并通过仿真和实验证明了该方法的有效性。

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来源
《17th world conference on nondestructive testing (17th WCNDT)》|2008年|1248-1256|
会议地点 Shanghai(CN);Shanghai(CN)
作者
Mangui Liang; rnJun Wu; rnShujuan Wang; rnZhaowei Wang;
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作者单位

Institute of Information Science,Beijing Jiaotong University Beijing 100044,P.R.China;

rnInstitute of Information Science,Beijing Jiaotong University Beijing 100044,P.R.China;

rnInstitute of Information Science,Beijing Jiaotong University Beijing 100044,P.R.China;

rnInstitute of Information Science,Beijing Jiaotong University Beijing 100044,P.R.China;

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会议组织
原文格式 PDF
正文语种
中图分类组织检查法、非破坏性试验法;
关键词
ultrasonic testing, time-of-flight diffraction (ToFD) technique, deconvolution, wavelet;

机译：超声波测试，飞行时间衍射（ToFD）技术，去卷积，小波;

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1. Signal quality enhancement using higher order wavelets for ultrasonic TOFD signals from austenitic stainless steel welds [J] . Praveen A., Vijayarekha K., Abraham S.T., Ultrasonics . 2013,第7期

机译：使用高阶小波对来自奥氏体不锈钢焊缝的超声TOFD信号进行信号质量增强
2. An alternative Ultrasonic Time-of-Flight Diffraction (TOFD) method [J] . F.W.T. Yeh, T. Lukomski, J. Haag, NDT & E international . 2018,第DECa期

机译：替代的超声飞行时间衍射（TOFD）方法
3. An alternative Ultrasonic Time-of-Flight Diffraction (TOFD) method [J] . F.W.T. Yeh, T. Lukomski, J. Haag, NDT & E international . 2018,第Deca期

机译：替代的超声飞行时间衍射（TOFD）方法
4. Reference wavelets used for deconvolution of ultrasonic time-of-flight diffraction (ToFD) signals [C] . Farhang HONARVAR, Amin YAGHOOTIAN World Conference on Nondestructive Testing . 2008

机译：用于超声波飞行时间衍射（TOFD）信号的去折叠的参考小波
5. Ultrasonic signal detection and recognition using dynamic wavelet fingerprints. [D] . Hou, Jidong. 2004

机译：使用动态小波指纹进行超声波信号检测和识别。
6. Broadband and High Sensitive Time-of-Flight Diffraction Ultrasonic Transducers Based on PMNT/Epoxy 1–3 Piezoelectric Composite [O] . Dongxu Liu, Qingwen Yue, Ji Deng, 2015

机译：基于PMNT /环氧树脂1-3压电复合材料的宽带高灵敏度飞行时间衍射超声换能器
7. Reference wavelets used for deconvolution of ultrasonic time-of-flight diffraction (ToFD) signals [O] . Farhang Honarvar, Amin Yaghootian 2012

机译：用于超声飞行时间衍射（ToFD）信号反卷积的参考小波
8. Ultrasonic Time-of-Flight Diffraction (TOFD) Measurements of Crack Depths in an Acceleration Reservoir of a High Velocity Research Gun [R] . Gieske, J. H. 1988

机译：超高速飞行时间衍射（TOFD）测量高速研究枪加速油藏中的裂缝深度

Reference wavelets used for deconvolution of ultrasonic time-of-flight diffraction (ToFD) signals

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