Affiliations: State Key Laboratory for Strength and Vibration of Mechanical Structures, Shaanxi Engineering Research Center of NDT and Structural Integrity Evaluation, Xi'an Jiaotong University, Xi'an, Shaanxi, China
Correspondence:
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Corresponding author: Zhenmao Chen, State Key Laboratory for Strength and Vibration of Mechanical Structures, Shaanxi Engineering Research Center of NDT and Structural Integrity Evaluation, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China. Tel./Fax: +86 29 82668736; E-mail:chenzm@mail.xjtu.edu.cn
Abstract: In this study, quantitative evaluation of defects in an
outer-square-inner-round (OSIR), aluminum pipe, which is used as the
coolant pipe of Tokamak superconducting magnet, is conducted based on the
eddy current testing (ECT) technique. First, numerical simulations to
predict ECT signal due to defects in OSIR pipes are performed using a code
of Ar method; Second, ECT signal is detected using an
Eddyfi ECT instrument with an absolute pancake ECT probe; Finally, the
defect profile in OSIR pipe is reconstructed from the experimental ECT
signals with the help of a fast-forward ECT solver, the developed multiple
databases strategy and the deterministic inversion algorithm.
