Contactless detection of bending sensitive magnetostrictive bilayers utilizing higher harmonics

Issue title: Proceedings of the twelfth International Symposium on Interdisciplinary Electromagnetic, Mechanic and Biomedical Problems, ISEM Bad Gastein

Article type: Research Article

Authors: Kosel, J.^{a; *} | Pfützner, H.^a | Traxler, S.^a | Kaniusas, E.^a | Mehnen, L.^a | Meydan, T.^b | Vazquez, M.^c | Rohn, M.^d | Merlo, A.M.^e | Marquardt, B.^f

Affiliations: [a] Vienna University of Technology. 27, 1040 Vienna, Austria | [b] Wolfson Centre for Magnetics Technology, Cardiff University, UK | [c] Instituto de Ciencia de Materiales de Madrid, CSIC, Spain | [d] Profactor, Steyr, Austria | [e] Centro Ricerche Fiat – Vehicles, Torino, Italy | [f] ELCAT, Wolfratshausen, Germany

Correspondence: [*] Corresponding author. Tel.: +43 1 58801 35132; Fax: +43 1 58801 35199; E-mail: juergen.kosel@tuwien.ac.at

Abstract: The study concerns a novel contactless sensor system based on a multifunctional magnetostrictive bilayer material. The permeability of the bilayer ribbons is sensitive either to bending or temperature. The higher order harmonics which are generated by the bilayer in response to a magnetic interrogation field are detected. Their amplitudes depend on the bilayer's permeability, hence on the quantity to be measured. The detection of the third harmonics proved to be most efficient. The sensor system enabled contactless measurements with a distance up to 1 m using a bilayer of only 80 mm in length and 0.1 mm in thickness.

Keywords: Sensors, magnetostriction, contact-less, multifunctional

DOI: 10.3233/JAE-2007-827

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 477-483, 2007