Abstract
We report a specially designed magnetic field gradiometer based on a single elliptical planar Hall effect (PHE) sensor, which allows measuring magnetic field at nine different positions in a 4 mm length scale. The gradiometer detects magnetic field gradients with equivalent gradient magnetic noises of ∼958, ∼192, ∼51, and ∼26 nT/m√ Hz (pT/mm√Hz) at 0.1, 1, 10, and 50 Hz, respectively. The performance of the gradiometer is tested in ambient conditions by measuring the field gradient induced by electric currents driven in a long straight wire. This gradiometer is expected to be highly useful for the measurement of magnetic field gradients in confined areas for its small footprint, low noise, scalability, simple design, and low costs.
Subject
Electrical and Electronic Engineering,Mechanical Engineering,Control and Systems Engineering
Reference41 articles.
1. New Magnetic Anomaly Constraints on the Antarctic Crust;Kim;J. Geophys. Res. Solid Earth,2022
2. Chen, C.H., Chen, P.W., Chen, P.J., and Liu, T.H. Indoor Positioning Using Magnetic Fingerprint Map Captured by Magnetic Sensor Array. Sensors, 2021. 21.
3. AMR navigation systems and methods of their calibration;Včelák;Sens. Actuator A,2005
4. The optimum layout for giant magneto-resistive angle sensors;Ausserlechner;IEEE Sens. J.,2010
5. Musuroi, C., Oproiu, M., Volmer, M., Neamtu, J., Avram, M., and Helerea, E. Low field optimization of a non-contacting high-sensitivity GMR-based DC/AC current sensor. Sensors, 2021. 21.
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