A Magneto-Modulating Meter of a Weak Variable Magnetic Field

Аннотация

A magneto-modulating converter of a weak magnetic field with a core of an amorphous ferromagnetic alloy with compensated longitudinal magnetostriction, which operates in the mode of autoparametric amplification of the magnetic induction signal, is described. The frequency range of the measured magnetic field is 0.1–240 Hz and the peak-to-peak dynamic range is 120 nT. The sensitivity threshold of the converter is below the minimum level of geomagnetic noise, which allows, upon storage of a repetitive signal in the unshielded space, approaching the sensitivity threshold of superconducting magnetometers.