Transverse Field Effect in Fluxgate Sensors

Peter Brauer, José M.G. Merayo, Otto V Nielsen, Fritz Primdahl, Jan Raagaard Petersen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A model of the fluxgate magnetometer based on the field interactions in the fluxgate core has been derived. The non-linearity of the ringcore sensors due to large uncompensated fields transverse to the measuring axis are calculated and compared with measurements. Measurements of the non-linearity are made with a spectrum analyser, measuring the higher harmonics of an applied sinusoidal field. For a sensor with a permalloy ringcore of 1" in diameter the deviation from linearity is measured to about 15 nTp-p in the earth's field and the measurements are shown to fit well the calculations. Further, the measurements and the calculations are also compared with a calibration model of the fluxgate sensor onboard the "MAGSAT" satellite. The later has a deviation from linearity of about 50 nTp-p but shows basically the same form of non-linearity as the measurements.
Original languageEnglish
JournalSensors and Actuators A: Physical
Volume59
Pages (from-to)70-74
ISSN0924-4247
Publication statusPublished - 1997

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