Compact Magnetic Gradiometer and its Astatization

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 2015 English Publisher:Elsevier BVJournal:Procedia Engineering, volume 120, pages 1,249-1,252 (issn: 1877-7058,

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Authors: Janošek, Michal; Vyhnánek, Jan; Platil, Antonín;

doi: 10.1016/j.proeng.2015.08.841

Compact Magnetic Gradiometer and its Astatization

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Abstract

AbstractWe present a compact (10-cm head size, 3-cm base) axial magnetic gradiometer with a method of its astatization (i.e. suppression of false response to homogeneous field). For astatization, we use two integrated orthogonal sensors and a second-order polynomial correction; after astatization the gradiometer error is suppressed more than 1000×. The gradiometer has been successfully used in a real-world metal-detection task which was allowed by the low gradiometer astatization error of ± 50 nT/m and its noise of 1 nT/(m√Hz) @ 1Hz.

Related Organizations

Czech Technical University in Prague
Czech Republic

Keywords

noise, gradiometer, fluxgate ;, astatization, Engineering(all)

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