Volume 9, Issue 4 (December 2013)                   IJEEE 2013, 9(4): 232-236 | Back to browse issues page

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Rezaeealam B. Spatial detection of ferromagnetic wires using GMR sensor and based on shape induced anisotropy. IJEEE 2013; 9 (4) :232-236
URL: http://ijeee.iust.ac.ir/article-1-545-en.html
Spatial detection of ferromagnetic wires using GMR sensor and based on shape induced anisotropy
B Rezaeealam
Abstract:   (10782 Views)
The purpose of this paper is to introduce a new technique for row spacing measurement in a wire array using giant magnetoresistive (GMR) sensor. The self-rectifying property of the GMR-based probes leads to accurately detection of the magnetic field fluctuations caused by surface-breaking cracks in conductive materials, shape-induced magnetic anisotropy, etc. The ability to manufacture probes having small dimensions and high sensitivity (11 mV/mT) to low magnetic fields over a broad frequency range (from dc up to 1 MHz) enhances the spatial resolution of such a probe that is applicable to eddy current testing (ECT) techniques. Here, an AC uniform magnetic field is formed using a Helmholtz coil in which by scanning the probe over an array of acupuncture needles, the distances between them are detected. The results verified the possibility and the performance of the proposed row spacing measurement using GMR sensor.
Keywords: Spacing Measurement , GMR Sensor
Full-Text [PDF 1711 kb]   (2490 Downloads)    
Type of Study: Review Paper | Subject: Purpose-Specific Hardwares
Received: 2013/01/12 | Revised: 2014/09/16 | Accepted: 2013/12/22
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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
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© 2022 by the authors. Licensee IUST, Tehran, Iran. This is an open access journal distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license.