2Michael DH, Lewis AM, Mciver M, et al. Thin-skin electromagnetic fields in the neighbourhood of surfacebreaking cracks in metals[Z]. Proc R Soc Lond A,1991. 587-603.
3Hoshikawa H, Koyama K. Uniform eddy current probe with little disrupting noise[J]. Review of Progress in QNDE, 1998,17:1059-1066.
4Hoshikawa H, Koyama K. Non-destructive testing of weld zone with a uniform eddy current probe[J]. Insight, 1998,40(4): 322-328.