Development of a Magnetostrictive Guided Wave Technique for Defect Detection and Monitoring in a Pipe Weld

2017 ◽  
Vol 37 (4) ◽  
pp. 230-238 ◽  
Author(s):  
Se Beom Oh ◽  
Yong Moo Cheong ◽  
Deok hyun Lee ◽  
Kyung Mo Kim
Keyword(s):  
Defect Detection ◽  
Guided Wave ◽  
Wave Technique

Application of the Wavelet Transform for Defect Detection in Prestressing Strands by Guided Wave Technique

2011 ◽  
Vol 130-134 ◽  
pp. 1998-2001 ◽  
Author(s):  
Jiang Xu ◽  
Hong Fen Xiong ◽  
Xin Jun Wu
Keyword(s):  
Cross Section ◽  
Defect Detection ◽  
Guided Wave ◽  
Detection Sensitivity ◽  
Structural Safety ◽  
Threshold Method ◽  
Civil Structures ◽  
Wave Technique ◽  
Different Depths ◽  
Prestressing Strands

Prestressing strands are widely used in civil structures. The health monitoring of the strands is an important factor in evaluating the structural safety. This paper aims to improve the detection sensitivity of the guided wave technique in strands by wavelet processing. Groove defects with different depths are cut in the wire and detected by magnetostrictive sensors. The wavelet threshold method is employed to denoise the signals. In this study, the suitable thresholds are related to the median value of the coefficients. Results show that defects above 3.6% cross section loss can be found after this processing. Moreover, the amplitudes of the defect signals are related to the defect depths, which can be used to size the defects.

Point-focusing SH guided-wave EMAT for defect detection in plate

2019 ◽  
Author(s):  
Hongyu Sun ◽  
Shen Wang ◽  
Songling Huang ◽  
Wei Zhao
Keyword(s):  
Defect Detection ◽  
Guided Wave

Guided-wave technique for the measurement of dielectric thin-film materials’ thermal properties

2002 ◽  
Vol 41 (16) ◽  
pp. 3127 ◽  
Author(s):  
Pascal Huguet-Chantôme ◽  
Ludovic Escoubas ◽  
François Flory
Keyword(s):  
Thin Film ◽  
Thermal Properties ◽  
Guided Wave ◽  
Dielectric Thin Film ◽  
Wave Technique

Determination of the Flexoelectric Coefficient in Liquid Crystal Using Fully-leaky Optical Guided Wave Technique

2014 ◽  
Vol 43 (12) ◽  
pp. 1231003 ◽  
Author(s):  
郑桂丽 ZHENG Gui-li ◽  
张辉 ZHANG Hui ◽  
叶文江 YE Wen-jiang ◽  
张志东 ZHANG Zhi-dong ◽  
宋宏伟 SONG Hong-wei ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Guided Wave ◽  
Wave Technique
Sign in / Sign up

Export Citation Format

Share Document