Performance of U-shaped Core Orthogonal Fluxgate Magnetometer

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概要

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• We proposed a new method for decreasing transformer effect from excitation current to sense coil in an orthogonal fluxgate operated in the fundamental mode. The point of this method is to use a U-shaped magnetic wire core on each branch of which two identical sense coils are wound and to arrange the two coils in counter series. As a result, induced voltage is reduced by a factor of 1/3 from that observed with a single wire core. The levels of the magnetic noise and drift are reduced substantially. For example, the noise level at 10 Hz decreased from 0.5 n T/√Hz to 0.08 n T/√Hz for small excitation current 4.1 m A with 5.8 m A dc bias. The driftof the sensors is confined within the range 0.5 n T for the U-shaped F G and 1 n T for the single core F G.

• 社団法人 日本磁気学会の論文
• 2005-05-01

著者

• Sasada I.

  Department Of Applied Science For Electronics And Materials Kyushu University

• Goleman K.

  Department Of Applied Science For Electronic And Materials Interdisciplinary Graduate School Of Engi

• SASADA I.

  Department of Applied Science for Electronic and Materials, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University

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• Analysis of eddy-currents interaction with a flaw in a conductive plate
• Performance of U-shaped Core Orthogonal Fluxgate Magnetometer

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