SU1451749A1 - Multichannel switching device of remote control system - Google Patents

Abstract

The invention relates to electrical signal transmission systems and is intended for telemetric information transmission systems, as well as for automatic control systems. The purpose of the invention is to increase the reliability of the transmitted information. The multichannel switchboard contains a generator of 1 switching frequency pulses, a delay element 2, and a block 3 for selecting groups of channels. first counter 4 pulses, elements AND of the second group, block 6 forming commands, elements AND 7 of the first group, block 8 channel selection, generator 9 pulses, shaper 10 pulse Reset, outputs 11, - block channel selection, outputs 12 12 "elements And first groups, pulse generator output 13, pulse generator output 14, outputs 15, -15 ' of channel group selection unit, information inputs, OR element, AND element, second pulse counter, code comparison unit, code setting unit, trigger, AND group elements Multichannel Outputs Torah. In order to increase the noise immunity of the control system of the automation operation, switching with a special control circuit is used, which makes it possible to create a system using a computer. 2 silt, n, 5 (L cd 4i CO 5n

Description

The invention relates to electrical signal transmission systems and is intended for telemetric information transmission systems, as well as for automatic control systems.

The purpose of the invention is to increase the reliability of the transmitted information.

Figs 1 and 2 depict the structure on the diagram of the multi-channel switch of the telecontrol system.

The multichannel switchboard contains a generator of 1 switching frequency pulses 1, a delay element 2, a channel group selection block 3, a first counter 4, a second group of AND blocks 5, a block of 6 command command forms 6, a first group of I blocks 7, a channel select block 8, generator 9 pulses, shaper 10 pulses Reset, outputs 1 1, - 1 1 "channel selection block, outputs 12, elements of the first group I 7, output 13 of the pulse generator reset, output 14 of the pulse generator, outputs 15j - ISji of the channel group selection block, information inputs 16, - 16, switch, element IL 17, AND gate 18, a second counter 19, the comparison unit 20 codes, codes specifying unit 21, a trigger 22, the third group of AND gates 23, 24 outputs a multichannel switch.

The multichannel switchboard of the telecontrol system works as follows:

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In the initial state, from the output of block 6 to the second input of the corresponding element And 7 of the first group, a log is received. A clock pulse from generator 1 is fed to the first input of block 3 of selection of channel groups and sets at the output of block 3 log.1, which is fed to the first input of the corresponding element And 7 of the first group, at the output of which log1 also appears, which is fed to the first inputs of elements And 5 of the second group. The same contact pulse goes through the delay element 2 to the input of the first counter of 4 pulses. From the output of block 3, the log 1 arrives at the first inputs of the channel selection block 8 and opens it for the passage of clock pulses coming from the delay element 2 from the corresponding outputs which, in time with incoming pulses, logo1 appears, which is fed to the second

the inputs of the elements And 5 of the second group, the third inputs of which receive signals from the information inputs 16, - 16,0 Digital signals can be of two levels: log.1 or log.O. If log.G arrives, then at the output of element And 5 of the second group there will also be log.1, which goes to the corresponding input of the element OR 17, from the output of which goes to the first input of element AND 18, to the second input of which receives generator 9 pulses, which the head signal is filled, and at the output a modulated pulse train is formed, which is fed to the input of the second counter 19, at the output of which a code is formed. This code goes to the first inputs of block 20 of code comparison, the second inputs of block 20 receive a code from the code setting block 21, and as a result of the code comparison, a log is generated at the output of block 20.O. In case of interference with the information signals 16t, it will be short in duration compared with the duration of the polled channel, therefore the code number received on the second counter 19 will always be less than the code number at the output of block 21, therefore in the case of the log. And 5 of the second group at the output of the code comparison unit 20 will be formed a logo1. If the code number received at the output of the second counter 19 is less than the code number specified in the code setting unit 21, and if the code number at the output of the second counter 19 pulses is greater than or equal to the code number from the output of block 21, then the output of the code comparison unit 20 log.O, arrives at the setup input 1 of the trigger 22, from the output of which log.1 goes to the second inputs of the And 23 elements of the third. groups, to the first inputs of which log.1 arrives in accordance with signals from information inputs 16 / - 16p, as a result of which log1 is obtained at the output of the corresponding AND element of the third group 23.

Since the pulse counter 4 counts the number of pulses equal to the number of elements of the control group plus one, block 3 turns off the corresponding control channel by feeding the corresponding input to the first input.

element And 7 of the first group of the log.O and sets the block 8 to the initial state. Information inputs 16-16 are polled for the period determined by the generator 1 of switching frequency pulses, whose frequency varies depending on the control groups polled by block 3 of the selection of control groups, depending on this the code in block 21 specifying the codes This is due to the appearance of interference in the channels whose polling frequency decreases with increasing interference duration.

After completing the survey of information inputs 16 | the second counter 1 is zeroed each time using the reset pulse shaper 10, and the output of the trigger 22 is set to a log.

Claims (1)

Invention Formula A multichannel switchboard of the telecontrol system, comprising a pulse generator, a delay element, the output of which is connected to the input of the first counter, an instruction generation unit, a first group of AND elements, an OR element, a trigger, characterized in that, in order to increase the reliability of the transmitted information, a signal generator is introduced into it reset, second and third group of elements AND, pulse-frequency generator, channel group selection unit, channel selection unit, second counter, code comparison unit, code setting unit, AND element, Exit pulse generator switchable frequency connected to the input of delay .elementa groups and the first input channel selection unit, the second inputs of which are connected to the respective outputs five 0 five five about 0 five the first counter, the outputs of the command generation unit are connected to the first inputs of the corresponding elements AND of the first group, the outputs of the channel group selection block are connected to the corresponding first inputs of the channel selector block, with the corresponding inputs of the switching frequency pulse generator, the code setting block and the second inputs And the first group, the second input of the channel selection block is connected to the output of the delay element, the outputs of the elements And the first group are connected to the combined first inputs of the corresponding The x elements of the second group, the outputs of the channel selection block are connected to the corresponding inputs of the signal conditioner Reset, with the corresponding second inputs of the elements AND of the second group and the first inputs of the corresponding elements AND of the third group, the third inputs of the elements AND of the second group are information inputs of the device, the outputs of the elements AND the second group is connected to the corresponding inputs of the OR element, the output of which is connected to the first input of the AND element, the second input of which is connected to the output of the pulse generator, the output element I is connected to the first input of the second counter, the second input of the second counter and the first trigger input are connected to the output of the reset pulse generator, the second trigger input is connected to the output of the code comparison unit, the outputs of the second counter are connected to the corresponding first inputs of the code comparison unit, the second inputs of which are connected to the corresponding outputs of the task setting unit, the output of the trigger is connected to the second inputs of the elements AND of the third group, the outputs of which are the outputs of the switch. /f./o 3rt w fttZJ , r-x) “F  . -X)