Design and Development of an Optimized Fluxgate Magnetometer for Improved Earth’s Magnetic Field Studies

Description

Download Design and Development of an Optimized Fluxgate Magnetometer for Improved Earth’s Magnetic Field Studies. Electrical and Computer engineering students who are writing their projects can get this material to aid their research work.

Abstract

This research work was centered on optimizing the Fluxgate Magnetometer Sensor (FMS) at reduced noise level and enhanced sensitivity. The FMS was developed using Manganese Zinc(MnZn) ferrite alloy different from the usual permalloy and amorphous alloy materials.

The developed FMS using MnZn ferrite achieved reduced sensor dimensions with high sensitivity and reduced noise level, thus meeting the necessary requirements for the earth‟s magnetic field studies.

However, the sensor was realized using MnZn ferrite ring core material, excitation and pick-up coils, and the interface electronic circuits. The performance of this designed and developed FMS was optimized using the modified Firefly OptimizationAlgorithm (FOA).

The characteristics of the developed fluxgate sensors were modeled using the modified FOA and the matching between the excitation and detection circuits was then considered.

Analysis was then carried out to determine the values of relevant parameters susing modified FOA written in the MATLAB program. The model yielded an accurate prediction of the sensitivity and noise level compared to the commonly used conventional Part-by-Part Optimization (PPO) and analytical optimization techniques.

Introduction

There have been increasing demands for the integration of a magnetic field sensor that can detect the magnitude and direction of the earth‟s magnetic field in complex electronic systems (Lv and Liu, 2014).

Such a magnetic field sensing system will find application in low-power mobile devices such as in terrestrial and space navigation systems including military detection, craft navigation, medical recognition, modern digital navigation, and nondestructive inspection (David et al., 2010; Hsieh et al., 2013).

The aim of this research is to design and develop an optimized Fluxgate Magnetometer Sensor (FMS), which has a small size, high sensitivity, low noise, low power consumption, and is capable of detecting the magnitude and direction of the earth‟s magnetic field.

In order to optimize the performance of magnetometers, different optimization techniques for their structures and core materials had been developed.

For example, the conventional approach was based on Part-by-Part Optimization (PPO) technique, which includes designing the sensor core first, then select the dimension of the pick-up coil, and finally develop a low-noise detection circuit.

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