SU1674207A1 - System for transmitting information through fiber-optic communication line - Google Patents

Abstract

The invention relates to fiber-optic information transmission systems intended for remote control of robotic complexes and other equipment. The purpose of the invention is to simplify the system. Into a system containing amplifier 1, mixer 2, multiplexers 3 and 20, encoders 4 and 21, modulator 5, carrier frequency generator 6, decoders 8 and 18, demultiplexers 9 and 19, selector 15, amplifier 16, demodulator 17, optoelectronic converters 7 and 22, electro-optical converters 10 and 14, optical splitters 11 and 13, and a fiber-optic transmission line 12 containing a single fiber, a low-pass filter 24 and a high-pass filter 23 are inserted, the selector 15 is made in the form of a low-pass filter 25 and a filter high frequency 26. 1 Il.

Description

The invention relates to communication technology, in particular to fiber optic information transmission systems designed for remote control of robotic complexes and other equipment.

The purpose of the invention is to simplify the system.

The drawing shows a block diagram of a system.

The system for transmitting information on a fiber-optic communication line contains an amplifier 1, a mixer 2, a multiplexer 3, an encoder 4, a modulator 5, a carrier frequency generator 6, an optoelectronic converter 7, a decoder 8, a demultiplexer 9, an electro-optical converter 10, an optical splitter on the transmitting side 11, a fiber-optic communication line 12, on the receiving side there is an optical splitter 13, an optoelectronic converter 14, a selector 15, an amplifier 16, a demodulator 17, a decoder 18, a demultiplexer 19, a multiplexer 20, an encoder 21, an electrooptic 22. convertor at the transmitting side administered highpass filter (HPF) 23, a lowpass filter (LPF) 24, a selector 15 is configured to low pass filter 25 and high pass filter 26.

The system operates as follows. The video signal from the camera and telemetry signals from the sensors are respectively supplied to the inputs of the amplifier 1 and multiplexer 3. From the output of the amplifier 1, the video signal is fed to the low-pass filter 24, eliminating the high-frequency components in the frequency range of more than seven MHz present in the video signal spectrum. The multiplexer 3 converts the telemetry signals into a serial NRZ code, which is input to the encoder 4, which converts the NRZ code to a linear self-synchronizing code, from the output of the encoder 4, the signals are fed to the input of the modulator 5, to the other input of which the carrier frequency from the generator 6 The modulator 5 can be performed amplitude, frequency or phase depending on the requirements of the system for speed, the probability of error, complexity, etc. The carrier frequency f _H > f _BMa Kc + Δf, where feMSKc is the upper boundary of the spectrum of the video signal (7 MHz) and Δ ΐ ~ is the frequency band necessary for transmitting telemetry signals in a linear code. From the output of the modulator 5, the modulated carrier frequency enters the filter 23, eliminating the combined components located in the spectral region of the video signal. The mixed video signal and telemetry signals from the output of the mixer 2 are fed to the input of the converter 10. converting the electrical signal into an optical signal with a radiation wavelength A; . From the output of the converter 10, the optical signal through the splitter 11 is fed into the fiber-optic communication line 12, and from it through the splitter 13 on the receiving side is fed to the input of the converter 14, which converts the optical signal with a radiation wavelength λι into electrical. From the converter 14, the signal arrives at the inputs of the low-pass filter 25 and high-pass filter 26, which are part of the selector 15, in which the separation of television and telemetry channels. From the output of the low-pass filter 25, the video signal through the amplifier 16 is fed to the monitor, from the output of the high-pass filter 26, the modulated carrier is fed to the input of the demodulator 17, in which the linear code is extracted. From the output of the demodulator 17, the linear code is sent to the decoder 18, which converts it into a serial NRZ code, which flows to the demultiplexer 19, which separates the telemetry channels. The signals of the telecontrol channels are time-multiplexed by a multiplexer 20, from the output of which a serial NRZ code is fed to the input of the encoder 21, which performs the same function as the encoder 4. From the output of the encoder 21, a linear self-synchronizing code is fed to the input of the converter 22, which converts the linear code into a sequence of optical pulses with a radiation wavelength y · Through the splitter 13, the optical signal from the output of the converter 22 is input into the communication line 12, from which through the splitter 11 is fed to the input 7 zovatelya performing conversion of optical pulses with a wavelength of Ar in the line code, applied to the input of the decoder 8, the output of which post-, NRZ-code sequence is input to a demultiplexer 9, separating telecontrol channels.

Thus, the system transmits all the information flows circulating in the remote control system, one fiber in a limited frequency range.

Claims (1)

SUMMARY OF THE INVENTION A system for transmitting information on a fiber-optic communication line, comprising, on the transmitting side, an amplifier whose input is the information input of the system, a mixer, a multiplexer, the inputs of which are information inputs of the first group of the system, the output of the mixer is connected via an electro-optical converter to the input of the optical splitter, the input-output of which is connected to the fiber-optic communication line, the output of the multiplexer is connected through the encoder to the input of the modulator, the output of the optical the coupler is connected through a series-connected optoelectronic converter and decoder to the input of the demultiplexer, the outputs of which are the outputs of the first group of the system, on the receiving side there is an optical splitter, the input-output of which is connected to the fiber-optic communication line, the output of the optical splitter is connected to the input of the optoelectronic converter, a demodulator, the output of which is connected through a decoder to the input of the demultiplexer, a multiplexer, the inputs of which are information inputs of the second group of systems threads, the multiplexer output is connected through a series-connected decoder and an electro-optical converter with the input of an optical splitter, a selector, an amplifier, the output of which is an output of the system, the outputs of the demultiplexer are the outputs of the second group of the system, characterized in that, for the sake of simplification, they are introduced on the transmitting side low-pass filter and high-pass filter, the output of the amplifier through a low-pass filter is connected to the first input of the mixer, the output of the modulator through a high-pass filter is connected to w with the mixer input, on the receiving side the selector is made on a high-pass filter and a low-pass filter, the output of the optoelectronic converter is connected to the input of the low-pass filter and the high-pass filter of the selector, the output of the low-pass filter is connected to the input of the amplifier, the output of the high-pass filter is connected to the input of the demodulator .