Hidden metallic object localization by using giant magnetic resistor sensors
ISSN: 0332-1649
Article publication date: 15 November 2011
Abstract
Purpose
The purpose of this paper is to achieve a very accurate localization of hidden metallic objects in human medicine applications.
Design/methodology/approach
The proposed methodology takes advantage of the eddy current effect within a metallic object. Its magnetic reaction field will be measured, e.g. with giant magnetic resistor (GMR) sensors.
Findings
A comparison of measurements and numerical results obtained by finite element computations demonstrate the reliability and positively gives a clue about the feasibility of the suggested method.
Research limitations/implications
While measuring noisy signals, the use of a lock‐in amplifier is rather expensive; especially, in applications with a high number of GMR sensors the use of channel multiplexer must be considered, which again may generate noise.
Originality/value
The paper shows how appropriate shielding of external fields in the measurement setup ensures results of satisfying quality.
Keywords
Citation
Renhart, W., Bellina, M., Magele, C. and Köstinger, A. (2011), "Hidden metallic object localization by using giant magnetic resistor sensors", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 30 No. 6, pp. 1927-1937. https://doi.org/10.1108/03321641111168200
Publisher
:Emerald Group Publishing Limited
Copyright © 2011, Emerald Group Publishing Limited