Publication

A new compact 2D planar fluxgate sensor with amorphous metal core

Radivoje Popovic, Pavel Kejik
2000
Journal Articles

Abstract

A new compact 2D planar fluxgate sensor using a ferromagnetic amorphous metal core is described. The fluxgate sensor consists of two orthogonal planar metallic coils and a ring shaped amorphous magnetic ribbon mounted on a PCB substrate. Each planar coil is used alternatively as excitation or as pick-up coil. An electronic interface drives alternatively the two coils and performs a feedback on each sensing coil in order to compensate for the two measured magnetic field omponents. The sensing element has a magnetic sensitivity of 55 VrmT at an excitation frequency of 8.4 kHz with a 160 mApeak driving current. Used as an electronic compass, the reached precision angle is better than 1degree.

Official source

https://infoscience.epfl.ch/entities/publication/963c68a5-a51c-4cbe-a815-fa39a54fdbc3

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Radivoje Popovic, Pavel Kejik
2000
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/963c68a5-a51c-4cbe-a815-fa39a54fdbc3

About this result

Related concepts (31)

Amorphous metal

An amorphous metal (also known as metallic glass, glassy metal, or shiny metal) is a solid metallic material, usually an alloy, with disordered atomic-scale structure. Most metals are crystalline in their solid state, which means they have a highly ordered arrangement of atoms. Amorphous metals are non-crystalline, and have a glass-like structure. But unlike common glasses, such as window glass, which are typically electrical insulators, amorphous metals have good electrical conductivity and can show metallic luster.

Magnetic core

A magnetic core is a piece of magnetic material with a high magnetic permeability used to confine and guide magnetic fields in electrical, electromechanical and magnetic devices such as electromagnets, transformers, electric motors, generators, inductors, magnetic recording heads, and magnetic assemblies. It is made of ferromagnetic metal such as iron, or ferrimagnetic compounds such as ferrites. The high permeability, relative to the surrounding air, causes the magnetic field lines to be concentrated in the core material.

Magnetometer

A magnetometer is a device that measures magnetic field or magnetic dipole moment. Different types of magnetometers measure the direction, strength, or relative change of a magnetic field at a particular location. A compass is one such device, one that measures the direction of an ambient magnetic field, in this case, the Earth's magnetic field. Other magnetometers measure the magnetic dipole moment of a magnetic material such as a ferromagnet, for example by recording the effect of this magnetic dipole on the induced current in a coil.

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A new compact 2D planar fluxgate sensor with amorphous metal core

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