Low-frequency magnetic field detection for metal sensing

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

Article type: Research Article

Authors: Kiwa, Toshihiko^{a; *} | Kawata, Tomoaki^a | Tsukada, Keiji^a

Affiliations: [a] Department of Electrical and Electronic Engineering, Okayama University, 3-1-1 Tsushimanaka, Okayama, 700-8530, Japan

Correspondence: [*] Corresponding author. Tel.: +81 86 251 8130; Fax: +81 86 251 8130; E-mail: kiwa@elec.okayama-u.ac.jp

Abstract: A new type of magnetic field detection system, which can operate at a frequency below 1 kHz, is proposed and developed. The system consists of a 40-turn-coil to generate the magnetic field and a magneto resistive sensor to detect both the amplitude and the phase signal of the magnetic field induced by eddy-current and magnetization of the samples. The magnetic field detection of ferro- and non-magnetic samples using the system is demonstrated and discussed.

Keywords: Metal sensing, low-frequency, magnetic field detector

DOI: 10.3233/JAE-2007-745

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 447-451, 2007