Title :
DC magnetic field sensor employing multifield eddy-current effects
Author :
Kaplan, Ben-zion ; Rabinovici, R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel
fDate :
1/1/1988 12:00:00 AM
Abstract :
An eddy-current sensor for DC and low-frequency magnetic fields is treated. It is based on a direct application of eddy-current effects in nonlinear ferromagnetic conductors, in the presence of several alternating magnetic fields of different frequencies (multifield eddy-current effects). The one-dimensional multifield eddy-current effect is examined to elucidate the principle of operation of the sensor. The transduction gain of the sensor is evaluated, using a simplified model of its operation. Experimental results confirm the applicability of the model and demonstrate a sensitivity of 0.1 nT
Keywords :
eddy currents; magnetic fields; nonelectric sensing devices; DC magnetic field sensor; LF magnetic fields; alternating magnetic fields; multifield eddy-current effects; nonlinear ferromagnetic conductors; transduction gain; Conductors; Eddy currents; Frequency; Magnetic analysis; Magnetic fields; Magnetic levitation; Magnetic materials; Magnetic properties; Magnetic sensors; Nonlinear magnetics; Saturation magnetization;
Journal_Title :
Magnetics, IEEE Transactions on
