SU1339614A1 - Information transmitting and receiving device - Google Patents

Abstract

The invention relates to telemechanics and can be used to transmit remote switching signals in power systems. The purpose of the invention is improving noise immunity. The device comprises a generator 1, a coding unit 2, inputs 3, an input 4, an amplifier 5, a communication channel 6, filters 7 and 8, limiters 9 and 10, filter groups 11 and 12, a control filter 13, a decoding unit 14, the outputs 15, the detector 16, the amplifier 17 and the output 18. In the absence of signals at the inputs 3 to the input of the amplifier 5 receives a control signal. When signals appear at the inputs 3, block 2 outputs at the signal output two frequencies corresponding to the first and second groups. On the receiving side, the signal is allocated by filters 7 and 8 and filter groups 11 and 12 and is decoded by block 14. 4 Il. (L X) - o- with O5

Description

one

 The invention relates to telemechanics and can be used to transmit remote switching signals in power systems.

The purpose of the invention is to improve noise immunity.

Figure 1 shows the arrangement of frequencies of signals in the working channel band; figure 2 shows the functional circuit of the device; in fig. 3 is a functional coding block diagram; 4 is a coding table,

The device contains on the transmitting side generator 1, block 2 encoded NIN, inputs 3, input 4, amplifier 5, communication channel 6, on the receiving side filters 7 and 8, limiting amplifiers 9 and 10, filter groups 11 and 12, filter 13 control signal, decoding unit 14, outputs 15, detector 16, amplifier 17 and output 18.

Coding unit 2 contains frequency divider 19, triggers 20, trigger 21, And 22 and 23 elements, Invariator 24, And 25 elements, And 26 and 27 elements, And 28 elements - 31, frequency dividers 32 and 33, filters 34 and 35 low pass and differential element 36.

The device works as follows.

In the absence of signals at inputs 3, block 2 sends the signal of the control frequency f ,, to the input of amplifier 5, the input signal 4 to the signal 4 to be transmitted over the channel in normal mode, it modulates the control signal at frequency 2 with the help of block 2.

When a signal appears on one of the inputs 3, coding block 2 takes the pilot signal and outputs at its output signals of two frequencies corresponding to the given command (one frequency from the second and first groups),

When several commands appear at the same time, block 2 memorizes them and transmits them by the same code in turn according to their priority,

On the receiving side, the filter 7 selects the signal of the frequencies of the first group, and the filter 8 selects the second. Each of the signals passes the limiting amplifiers 9 and 10 and is selected by the corresponding filter of groups 11 and 12. The signal of the control frequency is passed by the filter 13 and the detected signal is output 18.

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The signals allocated by the filters of groups 11 and 12 are supplied to decoding unit 14, which outputs a decoded signal at one of the outputs 15.

The coding unit 2 operates as follows.

In the initial position, at the outputs of the flip-flops 20, the signal of logic 1, at one of the outputs of flip-flop 21 - the signal of logic, at the other - O, at the output of inverter 24 - logical M. Pulses from the outputs of dividers 19 are applied to the inputs of the And 25-27 elements, pulses corresponding to the lower one are sent to the And 26 element, and the upper frequencies of the control signal are transmitted to the And 27 element.

Items And 28-31 function as keys.

In the quiescent mode, the pulse sequence is only at the output of the AND 31 element, and at the output of the filter 35, a variable sinusoidal voltage is obtained, which is supplied through the differential element 36 to the input of the amplifier 5,

When a signal arrives at input 4, the trigger 21 changes its state and the pulse sequence of different parts appears alternately at the outputs of elements 30 and 31 and the control signal is frequency-shifted. When a signal arrives at input 3, trigger 20 changes state and the signal arrives at elements K 22 and 23, which control the sending of frequencies of the first and second groups, respectively. Elements 28 and 29 are opened, pulse sequences are received at their inputs, splitters 32 and 33 are separated, filters 34 and 35 are received at the inputs of element 36, at the output of which two signal signals are received,

The flip-flops 20 are connected to each other in such a way that the triggering of the oldest of them by priority blocks the triggering of the younger one.

Claims (1)

Invention Formula A device for transmitting and receiving information, containing on the transmitting side a generator and amplifier, the output of which is connected to the input of the communication channel g on the receiving side - a control signal filter, the output of which through the detector is connected to the input of the amplifier, the output of which is the first output of the device, the first group of filters, different TeMj that, for the purpose of noise immunity, a coding block is entered on the transmitting side, the first inputs of which are the first inputs of the device, the output of the generator is connected to the second input the coding unit, the output of which is connected to the input of the amplifier, the third input of the coding unit is the second input of the device, the second group of filters is entered on the receiving side, the first and second amplifiers are limited Teli, the first and second filters, a decoding unit. / group 2 group The output of the channel is connected to the inputs of the first and second filters, the outputs of which are connected to the inputs of the first and second limiter amplifiers, the output of the last of which is connected to the inputs of the filters of the second group and the filter signal, the output of which is connected to the first input of the decoding unit. , the outputs of the filters of the second group are connected to the second inputs of the decoding unit, the output of the first limiting amplifier through the corresponding filters of the first group are connected to the third inputs of the decoding unit,. the outputs of which are the second outputs of the device. p 1p 21 fi1.2 a1u CuHXpOHuJu-Tf 177 mm fyefA / 2 Tl / Ui "pOpn. AM Editor 0. Head M.Artamonov assailant Tehred M.DIDZHKORKOR Corrector V. But ha By 4227/42 Circulation 543 VNISHI State Committee GOLF for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production printing company, Uzhgorod, Projecto st., 4 Figm Subscription