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Design of eddy current testing probe for surface defect evaluation

Mohd Mawardi, Saari and Nurul A’in, Nadzri and A. M., Halil and M., Ishak and Kenji, Sakai and Toshihiko, Kiwa and Keiji, Tsukada (2019) Design of eddy current testing probe for surface defect evaluation. International Journal of Automotive and Mechanical Engineering (IJAME), 16 (1). 6357- 6367. ISSN 1985-9325(Print); 2180-1606 (Online)

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Early detection of defects in metallic components used in infrastructure is crucial to ensure their safety and reliability. This paper presents a development of a small eddy current testing (ECT) probe for evaluation of sub-millimetre surface defects. The ECT probe is developed in a planar differential using sensitive anisotropy magnetoresistance sensors, and the signal amplification is achieved by a home-made instrumentation amplifier. The developed ECT probe is evaluated by performing phase sensitive measurement of the magnetic responses of sub-millimetre surface slits at the excitation field of 200 Hz and 10 kHz. Compared to the real component of the magnetic response, the imaginary component can be used to identify the existence and position of the slits based on the signal intensity change caused by the induced eddy current. The spatial distribution of the magnetic response measured by the ECT probe can be used to estimate the dimension of the slit. It is expected that the developed ECT probe can be utilised for assessment of sub-millimetre surface defect.

Item Type: Article
Uncontrolled Keywords: Eddy current testing (ECT); crack detection; steel
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty/Division: Faculty of Electrical & Electronic Engineering
Faculty of Mechanical Engineering
Depositing User: Pn. Hazlinda Abd Rahman
Date Deposited: 17 Apr 2019 09:05
Last Modified: 08 Jul 2019 04:32
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