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Pulsed remote fi eld technique used for nondestructive inspection of ferromagnetic tube Binfeng Yang a Xuechao Lib aInstitute of Telecommunication Engineering Air Force Engineering University Xi an 710077 China bSchool of Electronics fax 867314573385 E mail address bf yang B Yang NDT53 4 1289 94 2 Smith RA Hugo GR Transient eddy current NDE for ageing aircraft capabil ities and limitations Insight 2001 43 1 14 25 3 Yang BF Luo FL Han D Research on edge identifi cation of a defect using pulsed eddy current based on principal component analysis NDT and E International 2007 40 294 9 4 Yang BF Luo FL Han D Pulsed eddy current technique used for nondestructive inspection of aging aircraft Insight 2006 48 7 411 4 5 Sophian A Tian GY Taylor D et al A feature extraction technique based on principal component analysis for pulsed eddy current NDT NDT and E International 2003 36 37 41 6 Finite element method magnetics FEMM version 3 1 Available femm ber lios de on line 7 Vasic D Bilas V Ambrus D Pulsed eddy current nondestructive testing of ferromagnetic tubes In IMTC 2003 instrumentation and measurement technology conference 2003 p 1120 5 8 Sophian A Tian GY Taylor D et al Design of a pulsed eddy current sensor for detectionofdefectsinaircraftlap joints SensorsandActua