TY - JOUR
T1 - Features extraction and discussion in a novel frequency-band-selecting pulsed eddy current testing method for the detection of a certain depth range of defects
AU - Xie, Shejuan
AU - Zhang, Lei
AU - Zhao, Ying
AU - Wang, Xiaogang
AU - Kong, Yuying
AU - Ma, Qiang
AU - Chen, Zhenmao
AU - Uchimoto, Tetsuya
AU - Takagi, Toshiyuki
N1 - Funding Information:
The authors would like to thank the National Key Research and Development Program of China under Grant 2018YFC0809003 , the Natural Science Foundation of China (No. 51877163 ). This work was partly supported by Xinjiang Uygur Autonomous Region Science and Technology Project of Supporting Xinjiang (No. 2019E0239 ) and Xinjiang Natural Science Foundation (No. 2019D01A76 ).
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/4
Y1 - 2020/4
N2 - Local wall thinning defects are unavoidable defects in actual engineering structures and in some cases it occurs in a certain depth range of the object structures. In this study, a novel frequency-band-selecting pulsed eddy current testing (FSPECT) has been proposed for the detection of local wall thinning defects in a certain depth range. Feature of peak value has been extracted and analyzed. The results demonstrate that the FSPECT possess the comparable performances in terms of detection sensitivity over the traditional square wave pulsed eddy current testing (PECT). In addition, other fruitful detailed features extraction in the numerical calculation and experimental signals of FSPECT are deeply studied. The features obtained by simulation and experiment mainly include lift-off point of intersection (LOI) and zero-crossing time. Furthermore, the influences of the depth of local wall thinning defect on features of LOI and zero-crossing time have been explored, which enhance the accuracy and reliability of FSPECT method for the evaluation of local wall thinning defects.
AB - Local wall thinning defects are unavoidable defects in actual engineering structures and in some cases it occurs in a certain depth range of the object structures. In this study, a novel frequency-band-selecting pulsed eddy current testing (FSPECT) has been proposed for the detection of local wall thinning defects in a certain depth range. Feature of peak value has been extracted and analyzed. The results demonstrate that the FSPECT possess the comparable performances in terms of detection sensitivity over the traditional square wave pulsed eddy current testing (PECT). In addition, other fruitful detailed features extraction in the numerical calculation and experimental signals of FSPECT are deeply studied. The features obtained by simulation and experiment mainly include lift-off point of intersection (LOI) and zero-crossing time. Furthermore, the influences of the depth of local wall thinning defect on features of LOI and zero-crossing time have been explored, which enhance the accuracy and reliability of FSPECT method for the evaluation of local wall thinning defects.
KW - Detection sensitivity
KW - Features extraction
KW - Frequency-band-selecting pulsed eddy current testing (FSPECT)
KW - Lift-off point of intersection (LOI)
KW - Zero-crossing time
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U2 - 10.1016/j.ndteint.2019.102211
DO - 10.1016/j.ndteint.2019.102211
M3 - Article
AN - SCOPUS:85077718128
SN - 0963-8695
VL - 111
JO - NDT and E International
JF - NDT and E International
M1 - 102211
ER -