DEVICE FOR GEOELECTRIC EXPLORATION WITH IMPROVED INTERFERENCE RESISTANCE, SENSITIVITY AND METERING ACCURACY Russian patent published in 2010 - IPC G01V3/12 

FIELD: mining.

SUBSTANCE: device includes control (1) unit, Walsh function forming (2) unit, unit (3) for changing the period of modulating pulses, modulators (4), 2ⁿ-input summing unit (5), transducer (6), antenna switch (7), receiver (8), multichannel correlator (9) that includes tapped delay line (10_i), multichannel multiplexer (11_i), multichannel (12_i) low-frequency filter, comparing instrument (13_i) (where i = 1, 2, 3, …, 2ⁿ - quantity of elements of ΔT duration that compile each phase-shift signal with improved autocorrelative properties that is included into sequence group for composite redundant signal), indication (14) unit, unidirectional conduction (15) element, two-digit shift register (16), two-input (17) commutator, subsidiary (18) multiplexer, group (19) multiplexers from 2ⁿ multiplexers, antenna (20).

EFFECT: increase of interference resistance, sensitivity and measuring accuracy at the expense of use of composite redundant signal that consists of a group of phase-shift signals with good autocorrelative properties.

11 dwg, 1 tbl