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Study on Design of Magnetic Fl
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The paper describes the magnetic Dipole model of magnetic flux leakage(MFL) based
on the principle of MFL testing, proposes the effects of surface defect width and depth on MFL field, and presents the peak-peak amplitude algorithm that the features of defect signal are extracted. The peak-peak amplitude and separation, signal gradient variation are used as the distinguish criterions of defects. The principle of instrumental hardware design is also introduced.
The introduced gun MFL testing instrument is successfully employed in the nondestructive
evaluation of gun.
Keyword: magnetic flux leakage; defect; nondestructive evaluation; peak-peak amplitude
algorithm; hardware design
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