Abstract

Previous research [1–4] has demonstrated that transient eddy-current (EC) techniques have significant advantages for the nondestructive evaluation (NDE) of hidden corrosion in multilayer aircraft structures when compared with conventional EC NDE. By sampling the time-domain response to a step or pulsed excitation using a high-speed digitiser, the probe response is effectively captured over a wide range of frequencies within a single measurement of only a few milliseconds duration, giving a very significant performance advantage over swept-frequency methods. In addition, direct measurement of the transient magnetic field (eg. using a Hall effect device), rather than the voltage induced in a pickup coil, allows transient EC NDE to probe more deeply into a multilayer structure compared to conventional EC techniques, giving improved sensitivity to deeply buried defects including hidden corrosion [1, 2, 5].

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.