Next Article in Journal
Chemical Stability of Zirconolite for Proliferation Resistance under Conditions Typically Required for the Leaching of Highly Refractory Uranium Minerals
Next Article in Special Issue
A Uniform Eddy Current Probe with a Double-Excitation Coil for Flaw Detection on Aluminium Plates
Previous Article in Journal
Thermo-Mechanical Fatigue Lifetime Assessment of Spheroidal Cast Iron at Different Thermal Constraint Levels
Previous Article in Special Issue
Phase Coherence Imaging for Near-Surface Defects in Rails Using Cross-Correlation of Ultrasonic Diffuse Fields
Open AccessArticle

Flaw Detection in Aluminum Plates Using a Rotating Uniform Eddy Current Probe with Two Pairs of Excitation Coils

1
Department of Risk Management and Environmental Sciences, Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama 240-8501, Japan
2
Department of Engineering, Lampung University, Lampung 35145, Indonesia
3
Department of Mechanical and Materials Engineering, Kanagawa Institute of Industrial Science and Technology, Yokohama 243-0435, Japan
*
Authors to whom correspondence should be addressed.
Metals 2019, 9(10), 1069; https://doi.org/10.3390/met9101069
Received: 4 September 2019 / Revised: 26 September 2019 / Accepted: 27 September 2019 / Published: 1 October 2019
The use of eddy currents for detecting flaws in specimens is of considerable significance in the industrial sector. In this study, a new design of a rotating uniform eddy current (UEC) probe, termed the rotating butterfly probe, is presented. The probe consists of two pairs of excitation coils arranged perpendicular to each other, positioned in two layers, and in a detection coil. The excitation and detection coils were installed the pancake orientation, which provides larger induction and enhances the sensitivity of flaws detection. In addition, to generate a rotating UEC distribution with same amplitude in all directions, the number of turns between first and second layers of the excitation coils and the amplitude of excitation current were arranged. Finite element simulations were conducted to confirm that rotating UEC distribution has the same amplitude in all directions. The experiment with the rotating butterfly probe was then conducted. In the experiment, the measured results with the probe was indicated the self-differential and self-nulling properties. Moreover, the probe was successful in detecting flaws in all directions on an aluminum plate. This attribute can be used for the effective inspection of test pieces. View Full-Text
Keywords: butterfly probe; rotating uniform eddy current; excitation coil and detection coils; flaws; aluminum butterfly probe; rotating uniform eddy current; excitation coil and detection coils; flaws; aluminum
Show Figures

Graphical abstract

MDPI and ACS Style

Repelianto, A.S.; Kasai, N.; Sekino, K.; Matsunaga, M.; Trung, L.Q. Flaw Detection in Aluminum Plates Using a Rotating Uniform Eddy Current Probe with Two Pairs of Excitation Coils. Metals 2019, 9, 1069.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop