METHOD AND SYSTEM FOR SYNCHRONIZATION OF SEISMIC AND SEISMO-ACOUSTIC MEASUREMENT NETWORKS, IN PARTICULAR INTRINSICALLY SAFE MINE NETWORKS

摘要

A method of synchronization of the seismic and seismo-acoustic measurement networks, in particular intrinsically safe mine networks is characterized in that in each transmission channel a measurement of time correction (2Ki) of signal propagation from the receiver (OD) to the transmitter (ND) and back is periodically initiated. Then in the receiver (OD) phase-locked loop comprising a real time clock (RT), shifted second internal reference tact (TWa) is generated as a correction in the continuous mode, shifted forward of the time correction (Ki) in phase relative to the second reference tact (TW) from a clock (GPS) with simultaneous forward shift of the internal time clock (RT) by the time correction (Ki). Besides, in a continuous mode, the internal synchronizing tact (TSa) is generated (N) times, preferably 250 times more often, with forward shift of correction time (Ki) in phase, relative to the second reference tact (TW), keying the output of supplying-separating inverter (PZ), intrinsically safely providing power to the teletransmission line (TR). The system designed for this method contains in a linear block (BL) of a receiver (OD) a semiconductor key (KL) of the receiver (OD) shorting a teletransmission line (TR), connected via an input transoptor galvanic seperator (SG2) of the linear block (BL) to the output (b) of the microcontroller (MK). In a transmitter (ND) a forming block (UF) of synchronizing tact (TS) is connected via a capacitor (C) to a transmitter linear block (BLN). The output of the forming block (UF) is connected to one of the inputs of a phase detector (DFN) of the microcontroller of the transmitter (MKN). The transmitter linear block (BLN) contains the transoptor galvanic separators (SG3 and SG4) of signals.