Design of Fluxgate Magnetometer Sensors

  Gautami Singh

Various types of Fluxgate magnetometer sensors are designed and developed for the determination of very weak magnetic field. The sensor core used here consists of high gradient hysteresis curve and of very low power loss. Excitation current is passed through the primary winding. The secondary coil picks up the imbalance in the magnetic flux due to the ambient magnetic field which acts oppositely in each half of the sensor core. This generates second harmonics in the secondary coil having a minimum frequency twice the fundamental drive frequency. Various sensor designs like taped core sensor, toroidal core sensor and PCB based sensor of different specifications are tested and reported. For attaining better stability and linearity of the measurement, the ambient magnetic field is zeroed by an artificial field created by compensating coil or feedback coil by passing appropriate dc current. In this way, the compensating magnetic field is equivalent to the ambient magnetic field and do not depend on amplifier parameters. From this technique, we can measure the magnetic field of very small value with improved accuracy. The sensor developed here are intended for all digital fluxgate magnetometer using FPGA based control circuits for future space payload design.

Keywords- Vector magnetic field, Fluxgate Magnetometer, Permeability, Low noise amplifier

Unique Identification Number - IJEDR1702063
Page Number(s) - 365-373
Pubished in - Volume 5 | Issue 2 | April 2017
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Gautami Singh,   "Design of Fluxgate Magnetometer Sensors", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.5, Issue 2, pp.365-373, April 2017, Available at :http://www.ijedr.org/papers/IJEDR1702063.pdf