@article {62471,
	title = {Development of an axial rotating magnetic field multi-coil eddy current sensor for electromagnetic characterization of stratified CFRP materials},
	journal = {NDT \& E International},
	volume = {126},
	year = {2022},
	month = {2022},
	pages = {102589},
	abstract = {
	This paper presents the development of a multi-coil eddy current (EC) sensor that uses an axial\&nbsp;rotating magnetic field\&nbsp;for the measurement of electrical resistance to determine the electrical\&nbsp;conductivity tensor\&nbsp;of stratified\&nbsp;carbon fiber reinforced polymer\&nbsp;(CFRP) materials. The sensor consists of an identical planar\&nbsp;racetrack\&nbsp;multi-coil, excited by two-phase sinusoidal current sources that are 90{\textdegree} apart in phase to generate an axial rotating magnetic field and eliminate the need for mechanical rotation. Each sensor{\textquoteright}s coil{\textquoteright}s resistance variation is measured using a developed experimental prototype unit and computed using a 3D\&nbsp;finite element method\&nbsp;(FEM) based on the (A, V{\textendash}A) formulation. The inverse problem technique that minimizes the difference between the calculated and measured resistances is then used to identify the electrical conductivity tensor components using the\&nbsp;particle swarm optimization\&nbsp;(PSO) algorithm. The comparison between the computed resistances and the measured ones shows an excellent concordance.

},
	isbn = {0963-8695},
	url = {https://doi.org/10.1016/j.ndteint.2021.102589},
	author = {Lahrech, Ahmed Chaouki and Naidjate, Mohammed and Helifa, Bachir and Zaoui, Abdelhalim and Abdelhadi, Bachir and Lefkaier, Iben-Khaldoun and Feliachi, Mouloud}
}
