Remote Field Eddy Current Military and Commercial Platform Applications
Abstract
A new development in NDI (nondestructive inspection) electromagnetic, eddy current technology enables users to inspect conductive materials under thick layers of composite and find subsurface flaws in thick aluminum, titanium and steel structure. The method is called Remote Field Eddy Current (RFEC). A group of Scientists refined this technology after years of working with Flat Geometry Remote Field Eddy Current (FG_RFEC) technique, as well as in finite element modeling of electromagnetic NDI phenomena [1-4]. A new eddy current instrument, Super-Sensitive-Eddy-Current (SSEC) system with extremely high gain, 100 dB - 140 dB, has also been developed to deal with the low level signals obtained from the FG_RFEC technique after deep penetration. Conventional eddy current techniques, ECT, are capable of detecting only surface and subsurface flaws due to restriction of the skin-depth equation. FG_RFEC technique with the SSEC system allows measurement of signals that have penetrated through the whole wall thickness. Skin-depth is no longer the limit in flaw detection. Meantime, the technique also has high sensitivity to surface and subsurface flaws due to the high gain of the SSEC system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 2006
- Accession Number
- ADA507166
Entities
People
- John C. Brausch
- Kenneth J. Lacivita
- William Sanders
- Yushi Sun