MAKING OF FLUXGATE MAGNETIC SENSOR AND ITS APLICATION FOR MEASURING THE MAGNETIC FIELD

• Main Author: AZHAR (NIM 20206035), ZUL
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/11709
• Institution: Institut Teknologi Bandung

Fluxgate magnetic sensor design that using double secondary coil (pick-up) has been made. Fluxgate sensor element has two excitation coils, two pick-up coils and seven layer of sensor cores. Excitation coils as internal magnetic field generator and pick-up coils as receiver exchange of external field (sensing), so the sensitivity of fluxgate sensor depend on design of secondary coils element. Magnetic field in the secondary coil will be zero while no external magnetic field, moreover if external magnetic field exist so that exchange of magnetic field will take place in the secondary coil. Fluxgate magnetic sensor works based on the second harmonic principle. According to this principle, external magnetic field intensity is proportional with the output voltage of sensor. Based on the analysis of the data was received by the sensor's sensitivity sensor x, sensor y and sensor z that is 283,02mV/uT; 329,91mV/uT and 312,14mV/uT, respectively. The maximum absolute error that was received from the polynomial function approached above was 0,46mV/uT; -0,22mV/uT and 0,63mV/uT and the Level of the maximum relative error of the sensor system in this approach was 1,30%; 0,63% and 0,43%, respectively. <br />