SU1345231A1 - Telesignals transmitting-receiving device - Google Patents

Abstract

The invention relates to the field of transmission of telemechanical information and can be used in organizing the transmission of information from precinct, power control centers to power systems using only one frequency communication channel. The aim of the invention is to increase the reliability of the received response information. The introduction of an additional NAND element and two NON elements into the device did not allow the formation of a register shift pulse when receiving from the receiving side only three of the four possible pulses. This made it possible to eliminate failures in the operation of the device, due to the installation of the discriminators of the receivers in an arbitrary position during their operation in half duplex mode, 1 sludge. (L jO 4 in y

Description

The invention relates to the transmission of telemechanical information and can be used in organizing the transmission of information from local energy control centers to power systems using only one frequency communication channel between power control stations.

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

The drawing shows a diagram of a device for transmitting and receiving television signals.

The device contains sensors on the transmitting side), the element NOT 2, the switch 3, the start element 4, the delay element 5, triggers 6-8, the AND-HE element 9, the elements. NOT 10 and 11, the transmitter 12, the receiver 13, on the receiving side the receiver I4, the transmitter 15, the triggers 16 and 17, the element NOT 18, the generator 19 of the pulses, the element AND-NOT 20, the triggers 21 and 22, the element 23 of the launch, consisting of the element 24 of delay and the element 25, the converter 26 of the code.

A device for transmitting and receiving television signals operates as follows.

Telemechanical information from information sensors, the role of which are performed by remote signaling devices located in the panel: remote control panel, is transmitted to. the inputs of the transmitter 12 and the element 5 delay. Removal of the prohibition from the corresponding sensor 1, -1n is carried out with the help of switch 3, which in turn connects them to the inputs of blocks 5 and 12. The information series in the form of short, long and superlong pulses enters the communication line.

The trigger 6 during the transmission is in a state in which from its first output a zero potential is prohibited — the input of the receiver 13 and allowing it to the input of the transmitter 12. At the end of the series, element 5 is triggered on the extra-long pulse and flips trigger 6, which from the second the output of the zap: decides the operation of the transmitter 12 and removes the prohibition from the receiver 13. In addition, the prohibition is lifted through the elements NOT 10 and 11 from the two triggers 7 and 8, which act as an analyzer of response pulses coming from the communication line.

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The use of elements NOT 10 and 11 provides a temporary separation between the operation of the element AND-NOT 9 and reset to zero position of the triggers 7 and 8 when receiving response pulses.

From the moment of the prohibition on the input of the transmitter 12, the level is removed from the communication line. Thus, conditions are created for transmitting response information from the controlled point on it. At the time of receipt of information pulses from the output of the receiver 14 located at the controlled point, in block 26 serial-parallel codes are formed which are entered into the display elements located in the panels of the power distribution board,

At the end of the information series on an extra-long pulse, the trigger element 23 puts a pulse on one of the trigger inputs 17. The last one, having reloaded, removes the prohibition from the input of the AND-NOT element 20. At the same time, from the second output of the trigger 17 through the HE element, the ban is lifted from two triggers 21 and 22, which determine the number of response pulses. Removing a ban from the NAND element 20 is the origin of the response pulses.

On the first front of the pulse from the output of the NAND 20 element, the trigger 16 triggers, which from its first output removes the prohibition from the transmitter 15. At the same time, the zero potential at the second output of the trigger 16 prohibits further operation of the receiver 14. The first and subsequent pulses from the element output 20 through the transmitter 15 enters the communication line and to the counting input of the trigger 21.

After counting four pulses from the pulse generator 19, the trigger 22 from its first output enters O into the code converter 26 and transfers the trigger trigger 17, which from the output I prohibits the switching of the triggers 2 and 22. Simultaneously from the second output through the element 18, a reset is performed of these triggers to the zero position and transfer of the trigger 16 to the position in which from the first output the zero potential prohibits further operation of the transmitter 15. From the second output of this

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trigger single signal is fed to the input of the receiver 14 and thereby prepares it for receiving new information.

After the four impulses of response information are converted at the receiver 13, they arrive at the analyzer input of the response pulses at triggers 7 and 8, which out of the three sends an impulse pulse to the switching block through the AND-NE element 9 to poll the next information sensor.

At the same time, the shift signal switches the trigger 6 to the position in which the operation of the receiver 13 is prohibited (O is applied to one of its inputs) and the operation of the transmitter 12 for transmitting the new information pulse series is enabled. This ends the full implementation of the transmission of the previous series and the beginning of the transfer of the new series.

Claims (1)

Invention Formula A device for transmitting and receiving television signals containing sensors on the transmitter side, the outputs of which are connected to the first input of the transmitter and to the input of the delay element whose output is connected to the first input of the first trigger, the first output of which is connected to the first input of the receiver, the output of which is connected to the first input the second trigger, the first output of which is connected to the first input of the third trigger, the second output of the first trigger is connected to the second input of the transmitter, the output of which is connected to the communication line and to the second input home receiver, the first element output is not connected to the first input of the switch output trigger element connected to the second input kommuta0 five 0 five 0 five 0 five torus, the outputs of which are connected to the inputs of the respective sensors, on the receiving side, the receiver output is connected to the first inputs of the trigger element and the code converter, the first output of which is connected to the second input of the trigger element, the output of which is connected to the first input of the first trigger, the first output of which is connected to the first the input of the NAND element, the output of which is connected to the first inputs of the second trigger, the transmitter and the third trigger, the first output of which is connected to the second input of the transmitter, the output of which is connected to connection to the first input of the receiver, the output of the second flip-flop is connected to the first input of the fourth flip-flop, the output of which is connected to the second outputs of the code converter and the first flip-flop, the second output of which is NOT connected to the second inputs of the second, fourth and third triggers, the second output the last of which is connected to the second input of the receiver, the generator output is connected to the second input of the NAND element, the outputs of the code converter are outputs of the device, characterized in that, in order to increase the reliability received information, the IS-NOT element is entered into it on the transmitting side, the second and third elements are NOT, the first output of the first trigger is connected via the second and third elements connected in series to the second inputs of the second and third triggers, the second output of the second and the output of the third trigger are connected with the first and second inputs of the element NAND, the output of which is connected to the second input of the first trigger and to the inputs of the start element and the element NO.  4ttT l tt  / 7 / y / 7 Editor I. Casard Compiled by N. Lysenko Tehred A. Kravchuk Order 4923/49 Circulation 543Subscribe VNIZHI State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Proofreader M. Demchik