ELECTROMAGNETIC EXPLORATION OF MINERAL RESOURCES Russian patent published in 2011 - IPC G01V3/12 

FIELD: electricity.

SUBSTANCE: underwater electromagnetic field (EM) generator (5) for electromagnetic exploration of sea bottom includes AC to DC converter (18) designed for generation of DC output signal from AC input signal, and switching module (19) intended for signal generation and setting the wave shape by means of selective switching of DC output signal. Electromagnetic field generator (5) also includes antenna (20) for generation of electromagnetic field in response to the signal setting the wave shape. Such approach to the design, which consists in use of the switched DC source, allows generating electromagnetic signals in the form of meander-shaped wave or in the form of the sequence of rectangular pulses which have sharp characteristics of transient sections and are independent of characteristics of AC input signal.

EFFECT: quick excitation of down converter of alternating voltage frequency and reduction of the transient process duration.

32 cl, 5 dwg