Magnetic field sensing using a fluxgate magnetometer: Difference between revisions
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==Basic principles of a fluxgate == | ==Basic principles of a fluxgate == | ||
===How does a fluxgate work?=== | ===How does a fluxgate magnetometer work?=== | ||
A fluxgate magnetometer works by exploiting the | A fluxgate magnetometer works by exploiting the magnetic response of a ferromagnetic core to detect an external magnetic field. It detects changes in magnetic permeability <math>\mu</math> due to the presence of an external field, typically producing a signal at 2nd harmonic of the excitation frequency. In a fluxgate sensor, the core material has very high magnetic permeability, meaning the core material can concentrate magnetic fields very well. Besides, it reacts strongly to changes in external fields. Its permeability changes nonlinearly as the material saturates, which is crucial for generating detectable signals (like the 2nd harmonic) when there's an external field. | ||
In a fluxgate sensor, the core material has very high magnetic permeability | |||
===Illustrations of a fluxgate=== | ===Illustrations of a fluxgate=== | ||
Revision as of 12:14, 23 April 2025
Introduction to magnetic field sensing
Different types of magnetometers
Applications
Basic principles of a fluxgate
How does a fluxgate magnetometer work?
A fluxgate magnetometer works by exploiting the magnetic response of a ferromagnetic core to detect an external magnetic field. It detects changes in magnetic permeability due to the presence of an external field, typically producing a signal at 2nd harmonic of the excitation frequency. In a fluxgate sensor, the core material has very high magnetic permeability, meaning the core material can concentrate magnetic fields very well. Besides, it reacts strongly to changes in external fields. Its permeability changes nonlinearly as the material saturates, which is crucial for generating detectable signals (like the 2nd harmonic) when there's an external field.
Illustrations of a fluxgate
Introduction to the fluxgate magenotometer
We plan for a setup....
Modelling and measurements of a permanent magnet
....
