An MFL Probe using Shiftable Magnetization Angle for Front and Back Side Crack Evaluation

Mohd Aufa Hadi Putera Zaini, Mohd Mawardi Saari, Nurul Arin Nadzri, Aiman Mohd Halil, Keiji Tsukada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Magnetic Flux Leakage (MFL) is one of the common methods in Non-destructive Tests employing magnetic technique. It can be used to detect flaws such as cracks in metallic materials such as steel, whereas, steel is widely known as a base material used for constructions. Therefore, early detection of these flaws is very crucial in order to prevent any accident that could cost lives. Conventionally, MFL method utilizes a strong magnetic field to saturate samples and detects the magnetic flux leakage. However, in this study, a sensitive magnetic probe has been developed to remove the need of using a strong magnetic field to saturate samples. the MFL probe is fabricated with 2 AMR sensors, a home-made amplifier circuit, a set/reset circuit and a flexible yoke. Furthermore, the flexible yoke is proposed in order to apply the magnetic field to the sample at different magnetization angles. Using the developed probe, we measure the magnetic responses at front and back side surfaces of a 2-mm galvanized steel plate at different frequencies. The sample itself is embedded with artificial slits with different depth, ranging from 1.0 mm to 1.6 mm. Moreover, the effect of different magnetization angle of 60° and 90° from the surface is also discussed. From the results, it can be said that the 60° magnetization angle from the surface is proved to provide a considerable improvement for the surface slit detection, while, having close to no effect compared to the 90° magnetization angle on the back side slit detection.

Original languageEnglish
Title of host publicationProceedings - 2019 IEEE 15th International Colloquium on Signal Processing and its Applications, CSPA 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages157-161
Number of pages5
ISBN (Electronic)9781538675632
DOIs
Publication statusPublished - Apr 22 2019
Event15th IEEE International Colloquium on Signal Processing and its Applications, CSPA 2019 - Penang, Malaysia
Duration: Mar 8 2019Mar 9 2019

Publication series

NameProceedings - 2019 IEEE 15th International Colloquium on Signal Processing and its Applications, CSPA 2019

Conference

Conference15th IEEE International Colloquium on Signal Processing and its Applications, CSPA 2019
CountryMalaysia
CityPenang
Period3/8/193/9/19

Keywords

  • Crack in steel
  • Magnetic flux leakage
  • Magnetization angle
  • NDT

ASJC Scopus subject areas

  • Signal Processing

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  • Cite this

    Hadi Putera Zaini, M. A., Mawardi Saari, M., Nadzri, N. A., Mohd Halil, A., & Tsukada, K. (2019). An MFL Probe using Shiftable Magnetization Angle for Front and Back Side Crack Evaluation. In Proceedings - 2019 IEEE 15th International Colloquium on Signal Processing and its Applications, CSPA 2019 (pp. 157-161). [8696064] (Proceedings - 2019 IEEE 15th International Colloquium on Signal Processing and its Applications, CSPA 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CSPA.2019.8696064