TY - GEN
T1 - Simultaneous measurements of metal thickness and defect depth using low frequency sweeping eddy current testing
AU - She, Saibo
AU - Xia, Zihan
AU - Zheng, Xinnan
AU - Yin, Wuliang
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - In this paper, a new low frequency (50 to 300Hz) sweeping eddy current testing (ECT) method is developed to simultaneously detect defect and measure thickness for metallic plates. The proposed method has been derived through analytical solution (AS) and verified by finite-element method (FEM) and experimental data. A new signal characteristic from both AS and FEM demonstrate that the maximum value of Δ Zabs (difference value between |Zsample| and |Zair|) and its corresponding frequency (lower than 300Hz) can be utilized to distinguish the defect depth in metallic plate and thickness of metallic plate, respectively |Zsample| and |Zair| denote the amplitude of the coil impedance (√R2+X2) under the tested metal plate and in the air, respectively. Moreover, the experimental verification results of aluminum plate correspond to AS and FEM. The accuracy of the estimated thickness of the aluminum plate is within 2%, and the accuracy of the estimated defect depth is within 17.4%.
AB - In this paper, a new low frequency (50 to 300Hz) sweeping eddy current testing (ECT) method is developed to simultaneously detect defect and measure thickness for metallic plates. The proposed method has been derived through analytical solution (AS) and verified by finite-element method (FEM) and experimental data. A new signal characteristic from both AS and FEM demonstrate that the maximum value of Δ Zabs (difference value between |Zsample| and |Zair|) and its corresponding frequency (lower than 300Hz) can be utilized to distinguish the defect depth in metallic plate and thickness of metallic plate, respectively |Zsample| and |Zair| denote the amplitude of the coil impedance (√R2+X2) under the tested metal plate and in the air, respectively. Moreover, the experimental verification results of aluminum plate correspond to AS and FEM. The accuracy of the estimated thickness of the aluminum plate is within 2%, and the accuracy of the estimated defect depth is within 17.4%.
KW - defect detection
KW - low frequency
KW - nondestructive testing
KW - Sweeping eddy current testing
KW - thickness measurement
UR - https://www.scopus.com/pages/publications/85197798832
U2 - 10.1109/I2MTC60896.2024.10561190
DO - 10.1109/I2MTC60896.2024.10561190
M3 - 会议稿件
AN - SCOPUS:85197798832
T3 - Conference Record - IEEE Instrumentation and Measurement Technology Conference
BT - I2MTC 2024 - Instrumentation and Measurement Technology Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2024 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2024
Y2 - 20 May 2024 through 23 May 2024
ER -