Search
Home > Issues > Retrieve
Metallic Crack Detections by Planar Inductive Coil Sensor Under AC and DC Magnetic Fields
Journal of Magnetics, Volume 17, Number 3, 30 Sep 2012, Pages 210-213
Abstract
To detect the surface and the opposite side cracks on iron specimen under AC and DC magnetic fields, the planar inductive coil sensors were employed. When the induced signals were measured, the planar inductive coil sensor and the magnetic field source were lifted off about 2 mm from the top surface of the specimen. AC magnetic fields and DC magnetic fields were applied to the specimens by single straight Cu coil and NdFeB permanent magnet, respectively. The detected signals at crack positions were good coincidence with those of the simulation results.
Keywords: inductive coil sensor; metallic crack; AC magnetic field; DC magnetic field; induced signal
DOI: http://dx.doi.org/10.4283/JMAG.2012.17.3.210
Full Text : PDF