SU467488A1 - Controlled point of telecontrol system - tv alarm - Google Patents

Description

one

The invention relates to the field of telegraph communication.

In the known telecontrol systems, time-division television signals, the connection of the communication channel to individual command and signal circuits at the control room and controlled points is carried out by a pulse distributor. The pulse distributor at a controlled point with dispersed points is a complex, unreliable and inefficient device.

In order to simplify and increase reliability, in the proposed controlled point between the output of the coincidence circuit and the output relay a pulse accumulator is connected, and between the output of the delay line and the coincidence circuit - a trigger generator, the auxiliary output of which is connected to the input of the controlled point via the output relay contact.

FIG. 1 shows a functional diagram of the time-pulse telecontrol system-tv system; in fig. 2 - functional scheme of the proposed controlled item; in fig. 3 is a timing diagram of the pulses in the communication line during the operation of one controlled point.

Communication between dispatch point 1 and each of the controlled points 2, 3 wasp2

Spread over a common line or communication channel of any configuration. The number of items monitored may vary. FIG. 1 shows the controlled point 2 and the most distant point 3 closest to the control tower.

The controlled point consists of a series-connected delay line 4, a trigger generator 5, a matching circuit

6, the pulse accumulator 7 and the output relay 8, the contact 9 of which connects the trigger generator to the line.

From dispatch point 1, synchronization pulses 10, 11 are sent to the communication line.

and others. cyclically. During the time of action of the synchronization pulse, the capacitors of the delay circuits of all controlled points are charged. Trigger generators at controlled circuit points

delays with assigned to each controlled point its delay occurs in the interval between synchronization pulses 10 and 11. Control of the controlled point

This is accomplished by cyclic transmission from the control room of the selective pulses 12, coinciding in time with the pulses of the trigger generator 5. In this case, the pulses of the trigger generator pass through the coincidence circuit 6 and enter the input 3.

pulse feed 7. A pulse coincidence in several cycles of the order leads to an increase in the potential of the pulse accumulator to a value sufficient to trigger the output relay 8. The relay switches on the contact and a second signaling pulse arrives at the second output of the trigger generator 13. The use of a pulse accumulator sharply increases the noise immunity of the telecontrol . The delay circuits of the monitored points are selected so that the remote signaling pulses correspond individually for each point of the time position.

The false operation of the coincidence circuit 6 due to the influence of the tele-alarm pulse when the contact 9 is closed does not occur due to the amplitude difference between the telecontrol pulses 12 and the tele-alarm 13.

The survey of all controlled items occurs in one working cycle. To transmit only the remote signaling at the monitored point, the delay line 4 is switched on with an individual delay and the trigger generator 5, and pin 9 is the remote signaling contact.

467488

four

A twofold increase in the number of control points is achieved by using the inverse zero polarity of synchronization pulses. In this case, the second part of the controlled point operates on the reverse polarity of the synchronization pulses.

Subject invention

The controlled point of the telecontrol system is a tv alarm system for dispersed objects with time-division signals, containing a delay line connected to the output relay through a circuit

coincidence, the second input of which is connected to the input of the delay line and V.: the input of the controlled point, characterized in that, in order to simplify and increase reliability, between the output of the coincidence circuit and the output relay an impulse drive is connected, and between the output of the delay line and the circuit coincidence - the trigger generator, an additional output of which is connected to the input of the controlled point

through the output relay contact.

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