SU1088052A1 - Device for transmitting and receiving telecontrol signals - Google Patents

Abstract

A DEVICE FOR TRANSMITTING AND RECEIVING TELECOMMUNICATION SIGNALS contains on its transmitting side a pulse generator, a counter, a switch and a transmitter whose output is connected to a communication channel, on the receiving side there is a receiver whose input is connected to a communication channel, the counter The outputs of which are connected with the corresponding. The corresponding first inputs of the decoder, the outputs of the decoder are the outputs of the device, so that, in order to increase the reliability of the device, the decoder is entered into it on the transmitting side, the output of the pulse generator is connected directly to the first input of the decoder and through the counter - with the second input of the decoder, the outputs of the decoder are connected to the corresponding inputs of the switch, the switch output is connected to the input of the transmitter, a pulse width limiter is entered on the receiving side, expand Only the pulse duration and pulse shapers, the receiver output is connected to the second input of the encoder and, in series, i connected the pulse width limiter and pulse width expander to the inputs of the first and second pulse drivers, the output of the first pulse shaper is connected to the first input of the counter and the third decoder input, the output of the second pulse shaper is connected to the second input of the counter. CX) 00 about ate IN

Description

The invention relates to signal transmission and can be used in telecontrol systems and tele signaling. A device for receiving telecontrol signals is known, comprising a command-to-electrical signal converter, an amplifier, counters, a code identifier, a descript, adnibrators, a detector, and a C 11 key. The disadvantage of such a device is the impossibility of simultaneously receiving two or several commands. The closest to the present invention is a device for transmitting and receiving telecontrol signals containing, on the transmitting side, a pulse generator, the output of which is connected to the first inputs of the frequency divider and the And element, the output of the frequency divider is connected to the first input of the counter, the high-voltage counter is connected to the corresponding inputs switch, pulse shaper, the output of which is connected to the second inputs of the counter and frequency divider, the power source, the first and second outputs of which are connected respectively to the first transmitter moves and. the power switch, the first and second outputs of the switch are connected respectively to the second inputs of the power switch and the AND element, the output of the AND element is connected to the second input of the transmitter, which code is the output of the transmitting side of the device, on the receiving side the receiver, the input of which is the input device, the receiver output is connected to the input of the command generator, the first and second outputs of which are connected respectively to the first inputs of the decoder and the clock pulse selector, the importer The initial setup, the first output of which is connected to the first inputs of the pulse generator of the program switches and the interface block, the second output - with the first input of the switching generator, the output and the second input of the switching pulse generator are connected with the first input of the first frequency divider, input the counter and the first output of the counter, the second output of the counter is connected to the second input of the decoder, the output of the clock selector is connected to the third input of the switching pulse generator, the pulse generator The output of the first frequency divider is connected to the third input of the decoder via the pulse gating driver, the first output of the decoder, the second output of the decoder is connected to the second input of the program switching pulse generator, the second output the decoder is connected to the second input of the interface unit, the first output of which is connected to the first, the input of the switching unit, the first output and the second input of which are connected respectively Naturally, with the input and output of the power supply unit, the code of the program switching pulse generator 1 and the other outputs of the interface unit and the on-block are respectively the nep.BbiM, BTopbiM and the third outputs of the receiving side of the t23 device. A disadvantage of the prior art device is the low reliability of signal transmission, since the clock pulses used to switch the pulse distributor on the receiving side of the device are formed by dividing the frequency of the quartz pulse generator triggered by the synchronization pulses. The mismatch of the frequencies of the pulse generators at the receiving and transmitting devices of the device leads to the appearance of spurious signals at the receiver output. The aim of the invention is to increase the reliability of the device. This goal is achieved by the fact that in the device for transmitting and receiving telecontrol signals, containing on the transmitting side a pulse generator, a counter, a switch and a transmitter, the output of which is connected to the communication channel, on the receiving side there is a receiver whose input is connected to the communication channel, the counter whose outputs are connected to the corresponding first inputs of the decoder, the outputs of the decoder are the outputs of the receiving side of the device, the decoder is entered on the transmitting side, the output of the pulse generator is connected directly Significantly with the first input of the decoder and through the counter - with the second input of the decoder; and through series-connected pulse duration limiter and pulse width expander - with inputs, the first and second are formed pulses, the output of the first pulse generator is connected to the first input of the counter and At the third B 5 SODOM decoder, the output of the second pulse generator is connected to the second input of the counter. Figure 1 shows the block diagram of the device; 2 is a diagram illustrating the operation of the device. The device (Fig. 1) for transmitting and receiving telecontrol signals on the transmitting side 1 comprises an oscillator 2, pulsed O9, a counter 3, a decoder 4, a switch 5, a transmitter 6, a link; 7 on the receiving side 8, a receiver 9, a pulse width limiter 10 , the expander 11 of the pulse duration, the driver of the pulses 12 (clock synchronization) ,, counter 13, the decoder 14, the former of the pulses 15 pulses (frame synchronization). . The device works as follows. On the transmitting side 1, the right angle pulses produced by generator 2 are considered to be counter 3. willows. the binary code goes to the decoder / torus 4, where they are divided into channels, the outputs of which serve the outputs of the decoder 4. Each TV channel on the decoder 4 has two outputs: the first outputs receive wide pulses of T duration corresponding to the transmission of the logical unit ( Fig. 2a), and the second short pulses of duration T, corresponding to the transmission of a logical zero (Fig. 25). Depending on the number of commands in each channel, the switch commutes to its output those or other pulses. At the same time, the pulse repetition period remains unchanged and ra. T. Fig.2 shows a group of pulses in the transmission of a logical unit on all channels. On Fig shows a group of pulses with pre -. giving a logical zero to all channels. On figo shows a group of pulses corresponding to the transmission on the first channel of the logical, zero, and on the other channels - a logical one. . The synchronization dp of the receiving side with the group of pulses transmitted between two adjacent groups of pulses form gaps so that the distance between the leading edges of the pulse of the last channel of the previous group and the pulse of the first channel of the next group equal to T exceeds the pulse repetition period T inside the group . Structurally, p) the openings between adjacent groups of pulses are due to the fact that the last few outputs of the decoder 4 remain free. At the receiving side 8 of the device in the receiver 9, the received distorted signal is amplified and limited in amplitude. The thus-formed 1 1 Pulse signal is fed to the input of the limiter 10 of the pulse duration. An example of the received signal is shown in figure 2,. At the output of limiter 10, pulses are obtained (Fig. 2d), the duration of which does not exceed the duration of the pulses of a logical zero. These pulses are fed to the input of the expander I of the pulse duration. The output of which produces pulses (Fig. 2e), the duration of which is longer than the duration of the transmission pulses of a logical zero, but less than the pulse duration of the transmission of a logical unit. pulses are formed, the fronts of which coincide with the falling edges of the extended pulses (Fig. 2; 1C.). The pulses formed in the imaging unit 12 are lagging in time from the pulses corresponding to the transfer of a logical zero, but coincide with the pulses corresponding to the transfer of a logical unit. Pulse distributor functions execute counter 13 and decoder 14. The counting input of counter 13 receives a signal from the generator of 12 clock clocks, and to the input Reset signal from the generator of 15 J frame synchronization pulses. The frame synchronization pulse affects the input of the counter 13 after each cycle, driving it to its initial state. Counter 13 counts pulses arriving from shaper I2. In this case, there are outputs of the decoder 14 corresponding to the channels. 52 through which logical units are transmitted, there appear pulses (FIR.2). Thus, the proposed device allows to receive clock synchronization pulses from the received sequence of pulses on the receiving side and thereby increase the reliability of the received information.

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Claims (1)

A DEVICE FOR TRANSMISSION AND RECEIVING OF SIGNALS FOR CONTROL, containing on the transmitting side a pulse generator, a counter, a switch and a transmitter, the output of which is connected * to the communication channel, on the receiving side - a receiver whose input is connected to the communication channel, the counter, outputs (outputs which are connected to the corresponding first inputs of the decoder, the outputs of the decoder are outputs to the devices, which means that, in order to increase the reliability of the device, a decoder is inserted into it on the transmitting side, the output of the pulse generator connected directly to the first input of the decoder and through the counter to the second input of the decoder, the outputs of the decoder are connected to the corresponding inputs of the switch, the output of the comm mutator is connected to the input of the transmitter, a limiter of pulse duration, an extender of pulse duration and pulse shapers, a receiver output are introduced connected to the second input of the decoder and through series-connected pulse width limiter and pulse width expander - with inputs of the first and W cerned pulse generators, the first pulse shaper output is connected to the first input of the counter and the third input of the decoder, a second pulse shaper output is connected to the second input COUNT + -. ka. SU „„ 1088052 "3