Array Pulsed Eddy Current Imaging Technique for Nondestructive Testing of Aging Aircraft

摘要

It is different to detect defect in multilayer structure of an aging aircraft fuselage, pulsed eddy current (PEC) technique has been demonstrated to be capable of quantifying this defect. Based on theoretical analysis of PEC technique, the array probe is designed and the array PEC imaging technique has been supposed to detect corrosion in the multilayer structure. By selecting peak amplitude and the zero-crossing time of the time domain transient signal as the imaging features, corrosion can be imaged and detected effectively. It's shown that the technique has the advantage of different imaging mode, fast detecting speed and quantitative measurement and has a lighting application foreground in the field of nondestructive testing.