MULTICHANNEL SYSTEM FOR SEISMIC SURVEYS Russian patent published in 2020 - IPC G01V1/22 G01V1/00 

FIELD: geophysics.

SUBSTANCE: invention relates to geophysics and can be used for seismic investigations. Disclosed is multichannel system for seismic investigations, which relates to multichannel systems for transmitting seismic signals from sensors-sensors to alarm notification devices, recording and processing devices and can be used for warning on occurrence of seismic shocks and tsunamis. Multichannel system for seismic investigations comprises communication line (1), terminal device (2), central station (3), subscriber stations (4) having input (5) for signals coming from seismic sensors-sensors or bottom sensors-sensors, which measure pressure of water column, command generator (6), recorder (7), central station synchronization signal extraction device (8), multipliers (9), Walsh signal reference generator (10), integrators (11), analogue-to-code converter (12), memory register (13), second controlled inverter (14), switch circuit (15), current generator (16), 2ⁿ-channel Walsh signal generator (17), auxiliary n-bit binary counter (18), 2ⁿ-input digital switch (19), a clock pulse generator (20), a subscriber station synchronization signal extraction device (21), command decoder (22), count pulse counters (23), a subscriber station zero-authority (24), a subscriber station flip-flop (25), first switch (26) and second switch (27), two-input adder (28), group of 2ⁿ multipliers (29), 2^n-1-bit cyclic shift register (30), first controlled inverter (31), zero-organ (32) of the central station, flip-flop (33) of central station, first switch (34) and second switch (35), two-input adder (36), group of 2ⁿ multipliers (37), 2^n-1-bit cyclic shift register (38), controlled inverter (39), central station clock pulse generator (40).

EFFECT: high noise-immunity of a multichannel system for seismic investigations owing to use of an ensemble of discrete orthogonal functions with good autocorrelation properties.

1 cl, 1 tbl, 8 dwg