Title :
Pulsed Eddy-Current Based Giant Magnetoresistive System for the Inspection of Aircraft Structures
Author :
Yang, Guang ; Tamburrino, Antonello ; Udpa, Lalita ; Udpa, Satish S. ; Zeng, Zhiwei ; Deng, Yiming ; Que, Peiwen
Author_Institution :
Dept. of Electr. & Comput. Eng., Michigan State Univ., East Lansing, MI, USA
fDate :
3/1/2010 12:00:00 AM
Abstract :
Research in nondestructive evaluation is constantly increasing the sensitivity of detection of small cracks embedded deep in layered aircraft structures. Pulsed eddy-current (PEC) techniques using coil probes have shown considerable promise in detection and characterization of buried cracks in multilayered structures. In this paper, we describe the design and development of a nondestructive inspection system that uses pulse excitation of a planar multiline coil to generate a transient field that is detected via a giant magnetoresistive (GMR) field sensor. An analysis algorithm using features in time and frequency domain processes the experimentally measured signals for automatic detection of small cracks under fasteners in multilayered structures at a depth of up to 10 mm.
Keywords :
aerospace components; coils; crack detection; eddy current testing; fasteners; giant magnetoresistance; magnetic sensors; magnetoresistive devices; multilayers; analysis algorithm; buried cracks; depth 10 mm; fasteners; frequency domain process; giant magnetoresistive field sensor; layered aircraft structures; multilayered structures; nondestructive evaluation; nondestructive inspection system; planar multiline coil; pulsed eddy-current techniques; small crack automatic detection; time domain process; transient field; Giant magnetoresistive sensors; nondestructive evaluation; pulsed eddy current;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2009.2032330
