Numerical consideration of magnetic camera for quantitative nondestructive evaluation

Jinyi Lee, Do Won Seo, Tetsuo Shoji

Research output: Contribution to journalConference articlepeer-review

14 Citations (Scopus)


It is important to estimate the distribution of intensity of a magnetic field for application of magnetic method to industrial nondestructive evaluation. Magnetic camera provides the distribution of a quantitative magnetic field with homogeneous lift-off and same spatial resolution. It consists of magnetic source, sensor head, magnetic lens, analog-digital converter, data processor, monitor, and each part corresponds to light source, CCD sensor, optical lens, processor, video recorder and monitor in digital video camera, respectively. Leakage magnetic flux near the crack on the specimen could be amplified by 3-dimensional magnetic fluid and zoom in and out of measurement area. This study introduces the numerical consideration of the effects of lens for focusing and concentrating of magnetic flux. The various parameters were magnetic permeability, shapes, sizes of the magnetic lens and measuring points of the magnetic flux. The result showed that the 3-dimensional magnetic fluid has sufficient lens effect for magnetic camera.

Original languageEnglish
Pages (from-to)630-635
Number of pages6
JournalKey Engineering Materials
Issue numberI
Publication statusPublished - 2004
Externally publishedYes
EventProceedings of the 11th Asian Pacific Conference on Nondestructive Testing - Jeju Island, Korea, Republic of
Duration: 2003 Nov 32003 Nov 7


  • Crack
  • Leakage Magnetic Flux
  • Magnetic Camera
  • Magnetic Fluid
  • Magnetic Lens

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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