COMMUNICATION UNIT FOR REMOTE CONTROL OVER PIPE-LINE CHANNEL Russian patent published in 2001 - IPC

FIELD: transmission of electric signals. SUBSTANCE: given unit is designed for organization of communication channel over main pipe-line. Communication unit for remote control includes pipe-line, transmitter incorporating grounding electrode, information signal generator and oscillatory circuit and receiver incorporating grounding electrode, selective amplifier and oscillatory circuit. Each oscillatory circuit is composed of inductance coil and cylindrical capacitor. Metal grid of pipe-line is used as one plate of capacitor and current-conducting material deposited on insulation of pipe-line at points of transmission and reception of information signal is employed as the other plate of capacitor. Oscillatory circuits of transmitter and receiver have resonance frequency equal to frequency of information signal. EFFECT: enhanced efficiency and functional reliability of unit. 3 dwg