METHOD AND SYSTEM FOR TRANSMISSION AND RECEPTION OF INFORMATION THROUGH COMMUNICATION LINE IN MINE SHAFT Russian patent published in 1994 - IPC

FIELD: mine communication systems. SUBSTANCE: method involves modulation of carrying signal by information signal, excitation in line of modulated high-frequency signal, its reception, selection and demodulation, creating an additional communication line in shaft, converting analog signal into a binary code pulse, providing it with redundancy, exciting TEN-wave with a frequency f = 20 MHz in communication line modulated by information signal, separating code pulse from demodulated signal, checking it and converting into analog signal. System comprises hoisting metal rope, additional metal conductor running along shaft axis, the metal structures of upper receiving platform of mine head gear being interconnected galvanically. Besides, system has transmitter 1, two clock pulse generators 2,3, code transformation units 4,5, synchropulse shaper 6, synchronizing unit 7, line units 8,9, analog-to-digit converter, modulator, transmitter, transmitting antenna, receiving antenna, receiver, demodulator, operating element. EFFECT: improved functional and operating characteristics. 5 cl, 4 dwg