Back to Search
Start Over
Pulsed Eddy Current Data Analysis for the Characterization of the Second-Layer Discontinuities.
- Source :
-
Journal of Nondestructive Evaluation . Mar2019, Vol. 38 Issue 1, p1-1. 1p. - Publication Year :
- 2019
-
Abstract
- Pulsed eddy current (PEC) technique has been applied as a viable method to detect hidden discontinuities in metallic structures. Conventionally, selected time-domain features are employed to characterize the PEC data, such as peak value, lift-off point of intersection, rising point, crossing time, and differential time to peak. The research presented in this paper continues the effort in a previous study on detecting the radial cracks starting from the fastener hole in second layer of a two-layer mock-up aircraft structure. A large diameter excitation coil with ferrite core is used to induce a strong pulse, and the magnetic field generated by eddy current is detected by Hall sensors. Instead of analyzing the limited time-domain features, we propose using machine learning methods to interpret the raw data without feature extraction. Thus, the second-layer discontinuities can be characterized presumably with all the information contained in a waveform. An automated detection framework is proposed in this paper and the experimental results demonstrate the effectiveness of the proposed method. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01959298
- Volume :
- 38
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Nondestructive Evaluation
- Publication Type :
- Academic Journal
- Accession number :
- 133986030
- Full Text :
- https://doi.org/10.1007/s10921-018-0545-6