| 摘要 |
FIELD: telemetry, telemetering, telecontrol; can be used in controlling and information - metering systems for organization of multiplex single- channels with combined transmission of information and supply power to terminals. SUBSTANCE: the specific feature of the method is in the fact that transmission of information in forward direction, supply power to terminals and synchronization of traffic are carried out by bipolar voltage impulses, having level differentials; coding of information in forward direction is performed by a combination of levels and signs of their differentials; and transmission of information in return direction is carried out by modulation of current in the circuit at low levels of voltages at the circuit formed at transmission of information in forward direction. The system of method implementation uses a channel control unit, terminals, communication line and a matching device; the channel control unit has a controller, clock pulse-generator, transmitter using a coding device, shaper, transformer, receiver using a decoding device and receiving device; the terminal has a transformer, rectifier, filter capacitor, voltage regulator, level detector, decoder of symbols, shaper of 18 sync signals, decoder of information type, data decoder, command decoder, address decoder, control circuit, functional unit, modulator and a coding device. EFFECT: enhanced reliability of synchronization, noise immunity and power efficiency of two-way traffic with combined transmission of data and supply power over two-wire circuits with conductive decoupling of terminals from the circuit. |
