SU1241514A1 - Device for transmission of telemetric and remote control signals - Google Patents

Abstract

The invention relates to telecommunications. Control accuracy is enhanced by reliably transmitting commands. The device contains a comparator 1, an information receiver 2, an information sensor 3, a command sensor 4, an encoder 5, a control unit 6, a timer 7, a signal conversion unit 8. a decoder 9, a logic unit (LB) 10, a comparison unit (BS) AND and a block memory 12. At the same time LB 10 consists of the majority element 17, registers 18 and the pulse distributor. BS 11 consists of a code 13 converter, a memory register 14, a comparator 15, and a command decoder 16. If a device has failed or interfered with the communication channel, most of the received code combinations were distorted, then LB 10, according to the received distorted symbol sequence, really determines the transmitted code combination, and BS 11 does not generate a reception, the signal to transmit the service combination YES, confirming the correctness of the passage of the command. The goal is achieved by the introduction of comparator 1, timer 7, LB 10 and BS 11. 2 3.p. f-ly, 1 ill. (L ate

Description

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The invention relates to telecommunications and can be used to transmit and receive commands and messages between the control tower and the unmanaged autonomous point.

The aim of the invention is to improve the control accuracy by increasing the reliability of command transmission.

The drawing shows a structural electric circuit of the proposed device.

The device for transmitting remote control and signaling signals comprises a comparator 1, receiver 2 information, sensor 3 information, command sensor A, encoder 5, control unit 6, timer 7, signal conversion unit 8, decoder 9, logic unit 10, unit P comparison, memory unit 12.

The comparison unit I1 contains a code converter 13, a memory register 14, a comparator 15, a decoder 16 commands.

Logical 10 block contains the majority element 17, registers 18, the distributor 19 pulses.

The device works as follows.

In the initial state, the signal conversion unit 8 is in the receive mode. Timer 7 is set to. It is turned off by the level of the signal arriving at its input from the output of comparator I.

When the state of any switching device changes from the operator's console (not shown), the 3 rd formation sensor generates a pulse that enters the (signal) input of the comparator 1. As a result of setting this impulse to the initial state, the output of the comparator 1 appears the signal level that permits timer 7. Timer 7 is switched to On mode and starts counting time. A pulse from the output of sensor 3 of information simultaneously arrives at the input of control unit 6 and initiates the generation by control unit 6 of a series of n pulses, which is fed to the input of sensor 4 of commands. The (informational) second inputs of the sensor 4 commands post information about the state of the sensor 3 information i Each possible state

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corresponds to a certain binary parallel code, which is transmitted to encoder 5 when a read command is received at the input of sensor 4. B encoder 5 converts binary code from. parallel to the nose with the attachment of the start and stop bits, and in this form the information goes to the signal conversion unit 8. The signal from the output of the comparator 1 simultaneously enters the fourth input of the control unit 6 and, from its first output, the signal converts the signal conversion unit 8 to the mode .. Transmission. The signal conversion unit 8 is the interface module with the communication channel and in the case of

the use of tone frequency channels (.PH) can be used as a model. The information coming from the output of the encoder 5 is transmitted by the signal converting unit 8 via the communication channel.

The control unit 6 from the second output supplies to the first input of the sensor 4 commands of n pulses. With the arrival of each pulse at the output of the command sensor 4, the same control code is generated. Each of these codes through encoder 5 and signal conversion unit B with the addition of start and stop bits enters the communication channel. Thus, an x-multiple transmission of the same codeword is performed. After the last character is transmitted, the control unit 6 transfers the signal conversion unit 8 in the receive mode.

The first received code combination passes through the signal conversion unit 8 and enters decoder 9, where it is converted from serial to parallel code. Start and stop bits are used to synchronize the exchange of information

between transmission and reception. one

The paraffel code from decoder 9 enters the logic block 10 at the inputs of registers 18. At the same time, the stop bit is allocated by the decoder 9 and through the fifth input and the third output of the control unit 6 enters the second (signal) input of the logic unit 10.

In real communication channels, interference always exists that leads to distortion of the transmitted symbols. Loe

A smart unit 10, by a received corrupted sequence of symbols, determines the actually transmitted codeword.

The pulse received at the (signal) input of the logic unit 10, the passage through the distributor 19 pulses, rewrites the first code information in the corresponding register 18 at the (clock) input of the latter. The stop bit of the received second code combination is also allocated by the decoder 9 and, passing through the control block 6 and the pulse distributor 19, rewrites it into the corresponding register 18. Similarly, each of the five received code combinations is written into the corresponding registers 18. When all the registers are full 18, at the (signal) output of the pulse distributor 19, a signal arrives at the (signal) input of the comparator unit 11 and permits its operation.

The information from the outputs of the registers 18 enters the majority element 17.

The majority element 17 selects one of the most likely combinations of received, performs the function of voting m from p. The most likely code combination is allocated by the majority element 17 and is transmitted to the output of logic block 10, then it is fed to the input of comparison block 11. Information on the third inputs of the comparison unit 11 receives information from the outputs of the memory block 12. In memory block 12, codes of all possible control commands with which the remote control and signaling system operates are pre-recorded. Comparison unit 11 performs the function of comparing the received command code with all list codes stored in memory unit 12, searches for the one to be executed, and sends information about the command to recipient 2 information. The decoder 16 of the commands converts the code "junction received over the communication channel and selected by the logic unit 10 as the most reliable one into a command code and sends it to the inputs of the comparator 15 and the register 14 of the memory. At the (installation) input of the comparator 15, the enable signal appears only then.

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when through the distributor 19 pulses information is recorded in all 1 without exception registers 18. At the output of the comparator 15, a pulse of 5 appears, if the codes received through. both inputs are equal. This pulse rewrites the command code into the memory register 14 at the (clock) input and simultaneously arrives at the output of the comparison block 11. In the converter, the command code 12 is converted into a form convenient for the recipient 2 of information, for example, a binary-decimal code, and outputted at the output of block 11 in comparison. The comparison pulse arrives at the third input of the control unit 6 and through it transfers the signal conversion unit 8 to the Transmission mode. At the same time, the same pulse is sent to the third input of the sensor 4 commands and the last generates a service combination YES, other than zero, which through the encoder 5, the signal conversion unit 8, the communication channel reaches the transmitting side and serves as a receipt for decrypted control command.

After passing the service combination YES, the signal conversion unit 8 is transferred by the control unit 6 to the Receive mode.

When transmitting, the signal conversion unit 8 is set to Receive mode. The service combination YES, the passage through the signal conversion unit 8 and the decoder 9, is fed to comparator 1, which changes the signal level at its output each time a different code combination is present at its bit inputs. Thus, comparator 1 turns off and resets timer 7 to its initial state, i.e. the device returns to its original state.

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If the device has experienced a failure or interference in the communication channel has distorted most of the received code combinations, then the comparator block 11 does not generate a signal to transmit the combinations and YES, confirming the correctness of the command. This is because the majority element 17, in the event of a shortage of votes, generates a code combination that does not correspond to any of the command codes stored in memory block 12. For this reason, no code comparison takes place in comparator 15 and the signal from its output is not generated.

In this case, on the transmission at the output of the timer 7, through time L from the moment of its activation, a signal is generated which, through control unit 6, causes the command to be retransmitted. During retransmission, the same n repeated code combinations are transmitted and at the same time timer 7 is switched on again. If this time no receipt is received, then the transmission is again repeated.

This continues until the connection is restored.

Thus, the criterion of the need for retransmission is the triggering of timer 7. The duration T is chosen based on the transmission time, the message processing time at the receiving side and the information transit time and the receipt via the communication channel.

Claims (3)

1. A device for transmitting remote control and signaling signals, comprising an information sensor, an encoder, a memory unit, an information receiver, a decoder, the input of which is connected to the output of the signal conversion unit, the first input of which is connected to the first output of the control unit, the second output connected to the first input of the command sensor, distinguished by the fact that, in order to increase the control accuracy by increasing the reliability of command transmission, a comparison block, a logic block comparator and a timer are introduced, the output of which one with the first input of the control unit, the second input of which is connected to the first input of the comparator and to the first output of the information sensor, the second outputs of which are connected to the corresponding second inputs of the command console, the third input of which is connected to the first output of the comparison unit and to the third input of the control unit, the fourth the input of which is connected to the input of the timer and from the output about 5 0 five 0 five 0 five comparator house, the second inputs of which are connected to the corresponding first decoder codes and to the corresponding first inputs of the logic unit, the second input of which is connected to the third output of the control unit whose fifth input is connected to the second output of the decoder, while the sensor outputs of the command are connected to the corresponding inputs the encoder, the output of which is connected to the second input of the signal conversion unit, the inputs of the receiver of information are connected to the corresponding second outputs of the comparison unit, the first inputs of which are connected cheny vpsodam.logicheskogo to the corresponding first unit, the second vpsod which is connected to the second input of the comparison unit, whose third inputs are connected to corresponding outputs of a memory block. 2. The device according to claim 1, which is based on the fact that the logic block contains the majority element, the registers and the pulse distributor, the first outputs of which are connected to the first inputs of the corresponding registers, the outputs of which are connected The corresponding inputs of the majority element whose outputs are the first outputs of the logic unit, the second output of which is the second output of the pulse distributor, the input of which is the third input of the logic unit, the first inputs of which are the second inputs of the registers. 3. The device according to p. 1.0 tl that the comparison unit contains a code converter, a memory register, a comparator and a decoder of commands, whose outputs are connected to the corresponding first memory register inputs and The first inputs of a comparator, the output of which is connected to the second memory register input, the outputs of which are with the corresponding inputs of the code converter, the outputs of which are the second outputs of the comparison unit, the first output of which is the output of the comparator, the second and third inputs of l are respectively vtorm and third inputs of the comparison unit, the first inputs of which are ALARM IN) I decoder commands.