Abstract
<p>Fluxgate is a magnetic sensor which works by comparing the measurement magnetic field with the magnetic field reference. This research aims to develop digital scales using fluxgate sensor. The steps involved were sensor development, characterization, distance and mass calibration of the fabricated sensor. Here, a digital scale based on fluxgate sensor with oval vitrovac 6025Z type core, 360 windings of excitation coil and 240 windings of pick up coil was successfully fabricated. Characterization result shows that the sensor has 1669.2 mV/μT sensitivity and working area of about ± 1.9 μT, with maximum absolute error found out to be around 0.0573 μT with maximum relative error is 1.464 %. Calibrated sensor value obtained reveals that the sensor works from 15.86 until 27.00 mm in distance, utilizing equation of relationship between mass and output voltage with the maximum relative error obtained as low as 1.49 %.</p>
Highlights
Fluxgate is a magnetic sensor which works by comparing the measurement magnetic field with the magnetic field reference
In order to improve the quality and output sensor, various studies has been reported by other researchers by modifying the ferromagnetic core structure [3], dimension and structure sensor, along with signal processing circuit
Various method has been reported in the development of sensor making such as conventional method, Printed Circuit Board (PCB), micro technology, and hybrid [4]
Summary
Fluxgate is a magnetic sensor which works by comparing the measurement magnetic field with the magnetic field reference. The advantages of this sensor are small dimension, high temperature stability, low power consumption [1] compared to other available magnetic sensor, makes the measurement of very low magnet field 10−1 − 106nT become possible, with high linearity and great sensitivity, reliability, relative simple, and more economical [2]. In order to improve the quality and output sensor, various studies has been reported by other researchers by modifying the ferromagnetic core structure [3], dimension and structure sensor, along with signal processing circuit. Other possible applications utilizing fluxgate sensor are vibration sensor [5], detector of magnetic material in soil subsurface [6], non-contact current and displacement measurements [7], etc. We aim to develop a digital scale utilizing fluxgate sensor
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