Effects of probe and inducer on saturation of crack signal in high-sensitivity AC field measurement technique

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Effects of probe and inducer on saturation of crack signal in high-sensitivity AC field measurement technique

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As in the eddy-current technique, a major problem in separating and sizing deep surface cracks in the AC field measurement (ACFM) technique is the saturation of the crack signal. It is essential that the operator ensures the crack signal does not reach saturation for the deepest possible crack. The paper explains how the parameters of the probe and inducer in the high-sensitivity ACFM technique with a rhombic inducer control the sensitivity and saturation level. Theoretical results are presented on the effects of the inducer size, probe position and probe length on the crack signal. It is shown that for an inspection task where there is an indication of the maximum crack depth, the saturation problem can be avoided by choosing the right size inducer, the right position for the probe and the correct probe length.

Inspec keywords: crack detection; electromagnetic induction; electric field measurement; eddy current testing; probes; electric sensing devices; inspection

Other keywords: probe length; inspection; eddy-current technique; crack depth; probe position; rhombic inducer; saturation; sensitivity; inducer size; crack signal saturation; deep surface cracks; AC field measurement

Subjects: Electromagnetic induction; Measurement of basic electric and magnetic variables; Materials testing; Steady-state electromagnetic fields; electromagnetic induction; Nondestructive testing: eddy current testing and related techniques; Electrical instruments and techniques; Voltage measurement

References

    1. 1)
      • D.H. Michael , A.M. Lewis , M. McIvor , R. Collins . Thin-skin electromagnetic fields in the neighbourhood of surface breaking cracks in metals. Proc. R. Soc. Lond. A, Maths Phys. Sci. , 587 - 603
    2. 2)
      • D. Mirshekar-Syahkal , R.F. Mostafavi . Analysis technique for interaction of high-frequency rhombic inducer field with cracks in metals. IEEE Trans. Magn. , 2291 - 2298
    3. 3)
      • D. Mirshekar-Syahkal , R.F. Mostafavi . High-sensitvity AC field measurement using rhombic inducer. Rev. Prog. Quant. Nondestr. Eval. , 1121 - 1128
    4. 4)
      • V.S. Cecco , G. van Drunen , R. S. Sharp . (1985) Recognising the scope of eddy current testing, Research techniques in nondestructive testing.
    5. 5)
      • J.H. Rose , E. Uzal , J.C. Moulder . Magnetic permeability and eddy-current measurements. Rev. Prog. Quant. Nondestr. Eval. , 315 - 322
    6. 6)
      • D. Mirshekar-Syahikal , C. Moschovinos , P. Hadjikyriakos . A new combination of probe and inducer with enhanced sensivity for AC field measurements of surface cracks. Rev. Prog. Quant. Nondestr. Eval. , 1095 - 1102
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