METHOD AND DEVICE FOR GENERATING ALTERNATING MAGNETIC FIELD FOR ELECTROMAGNETIC PROBING Russian patent published in 2016 - IPC G01V3/30 

FIELD: physics.

SUBSTANCE: invention can be used for excitation of alternating magnetic field at several frequencies in the frequency range of 0-10,000 Hz at geophysical research of the upper part of the Earth's crust. Core of the invention is that proposed method and a device make it possible to create a probing field at several frequencies simultaneously while providing low power consumption and high accuracy of generating primary probing magnetic field by pulse-width modulation of voltage pulses generated by the output key cascade operating in the mode of autogeneration with a feedback by current in the load.

EFFECT: higher efficiency of the research and the possibility of taking measurements in motion.

2 cl, 1 dwg