METHOD AND SCHEME FOR SYNCHRONISATION OF SEISMIC AND SEISMOACOUSTIC MEASUREMENT CIRCUITS, ESPECIALLY MINE SPARK-PROOF NETWORKS Russian patent published in 2016 - IPC G01V1/16 G01V1/22 

FIELD: geophysics.

SUBSTANCE: invention relates to geophysics and can be used in seismic surveys. Disclosed is a method of synchronising seismic and seismoacoustic measurement circuits, especially mine spark-proof networks consisting in that in each transmission channel is periodically initiated measurement value of time correction (2Ki) which takes into account time of transmission of signal from receiver (OD) to transmitter (ND) and back. Further, phase automatic frequency control circuit of receiver (OD), comprising internal clock time (RT), generates as a correction in continuous mode shifted second internal reference cycle (TWa) with phase-advance by value of time correction (Ki) in relation to second reference clock period (TW) hours (GPS) with simultaneous advance time hours internal time (RT) by value of time correction (Ki) in relation to second reference clock period (TW), performing manipulation of output of supply-divider converter (PZ), spark-proof supply teletransmission line (TR). Circuit in linear block (BL) of receiver (OD) has, performing manipulation of teletransmission line (TR), semiconductor switch (KL) of receiver (OD), connected through inlet photon-coupled galvanic isolation (SG2) of linear block (BL) to outlet (b) of microcontroller (MK). In its turn, in transmitter (ND) generating unit (UF) of clock cycle (TS) is connected through a capacitor (C) with linear block of transmitter (BLN). Output of generating unit (UF) is connected to one of inputs of phase detector (DFN) of microcontroller of transmitter (MKN). In its turn, in a linear block (BLN) of transmitter there are optically coupled galvanic isolation of signals (SG3) and (SG4).

EFFECT: technical result is increased accuracy of synchronisation of measurements.

7 cl, 3 dwg