SU310282A1 - DEVICE FOR TELECOMMUNICATION - Google Patents

Description

This invention relates to the field of telemechanics.

There are known devices for telecontrol stations of cathodic protection through the pipeline to my channel, containing a dispatcher and each controlled point receiver, whose input is connected to T1rubap | ro: vadom, station "cathodic protection connected via a modulator To the pipeline, generators, the output of which (Connected to one of the modulator inputs, switching unit, one of the inputs to which is connected to the receiver output, and the other input to the output of the PD imi: pulse bar, at the control room the decoder, whose input is connected to the output of the irovatel pulses and blo-signaling, the input connected to the output of the decoder, and for each paragraph kontroliruemo.m pauses shaper whose output is connected to the output leraklyucheni block.

The proposed device differs from the known ones in that it contains, at all controlled points, interconnected blocking unit and memory block, the inputs of which are connected to the outputs of the pulse shaper. The output of the memory unit is connected to the corresponding inputs of the driver and the switch unit. The output of the receiver is connected to the input of the prohibition unit, the output of which is connected to the input of the driver

pauses. At the last controlled. paragraph output pulse shaper with input shaper pause.

This improves the reliability of the device.

FIG. 1 shows a block diagram of the device; in fig. 2 - time diagram of the device, for five control

kp, kp- ,.

At the control room, the DPD device contains a pulse former Y, which can be started manually or automatically according to a predetermined polling program. The output of the pulse generator / is connected to one of the inputs of the modulator 2, the generator 3 is connected to the other input. The output of the modulator 2 itself is connected between the cathodic protection station 4 and the cathode output of the pipeline 5. The input of the receiver 6, the output of which is connected, is connected to the cathode output of the pipeline To one of the inputs of the switching unit 7, to the other input (blocking), the output of the pulse generator 1 is connected. The output of the switch unit and 7 is connected to one of the inputs of the decoder 8 (for example, the counter and pulses), to another input (zap) accele) connected to the output of the pulse shaper /. The output of the decoder 8 is connected to the input of the signaling unit. At the end: except for the similar nodes, KOTOf) bie have the same switching on as on the digital point, excluding only the decoder 8 and the outgoing unit 9, has 1 with a number of cables. knots. Shaper iShuls 1, to one of the inputs of which is connected one of the outputs of the switching unit 7 and which is impacted on the cnnt1p10L | Ipolitem point automatically, its output is also connected to one of the inputs of the chamfer 10. Units “memory output 0 of the memory 0 is connected to to the third input (prohibition) of the switching unit 7 "to one (blocking) input of the gap 11 pause maker; to another input of the 1st pause is connected another output of the switching block 7. The output of the pause 11 punch is connected to the second input of the ramping unit. iMetalSorV / and to the fourth (blocking) output of the switching unit 7. Also, the output of the pause maker // (connected to one (blocking) © block is cleared) 13. Two of the other (blocking) receivers 6 are connected to the two other (blocking) blocks and the output of the imaging unit /. The second output of the memory unit 10 is connected to the fourth (preparatory) input of the prohibition 12. One of the outputs of the block 12 is connected, to the third (blocking) input of the pauses // and the other output of the prohibition 12 is connected to another (reset-with) input-unit of the MEMORY1 10.

At the last controlled point, the device contains a receiver 6, a pulse shaper 1, the output of which is connected to the MODULATOR 2, a switching blunder 7 and the shaper 11, the output of which is connected to one (blocking) of the inputs of the switching unit 7. There is also a generator 3.

The device only provides telecontrol of cathodic stations with a frequency signal superimposed on the station's stationary current. In the case of using DC pulses as sipnals of the cathodic protection station itself, the device varies somewhat in (Receiving and transmitting parts. Receiver 6 is simplified, "modulator 2 is imputed, and the control frequency generator 5 is not used.

The device works as follows.

At Diopack DI, the Impulses / former that forms a rectangular impulse of n duration is automatically or automatically triggered. A rectangular impulse arrives at one of the inputs of the modulator 2 from the other impregnator of the modulator 5. The constant current of the cathodic protection station 4, before being supplied to the pipeline 5, is controlled by the control frequency fc for the duration of a rectangular pulse from the pulse former ./. The pipeline channel receives the control signal filled with the control frequency D ..

At the first controllable point (point from the control room, the signal is fed to the input of receiver 6, where 1P | is converted into a video signal. From the receiver 6, the video signal through the switching unit 7 is directly fed to the imaging unit and pulses 1, which, as in the display item , forms a rectangular emulsion with a duration of C on the end. or the action of the receiving signal - with a terminal 6 and delivers it to one of the mz inputs of the modulator 2. A control signal is generated, which is a constant current

The cathodic protection station enters the pipeline. At the same time, the signal from the imaging unit and the pulses 1 is fed to the blocking input of the switching unit 7, which prevents the signal from the receiver 6 from coming to the pulse shaper during its period.

The control signal is distributed to

to xntrol

receiving the first direct signal 1 occurs

forming a pilot signal and transmitting it to a pipe | drive with a good cathodic protection station.

The direct sipnal spreads to the third controlled point, and the reverse to the first, as shown in the time diagram.

The pulse former 1 is also fed to the memory block 10, which excludes a direct signal pulse, which at the end of the signal is triggered and sends a signal to the switch unit 7 and the pause driver //, which has been disconnected from the switching unit 7. Now this block eliminates the video signal from the receiver 6 directly to the driver

pulses 1,. to which the signal from the output of receiver 6 will flow through the pause generator 11 after the operation of the memory block 10 is triggered. Forms | p (the memory of the pauses by the signal from the memory block is prepared for receiving a signal from the switching unit 7.

After receiving a direct signal from a diopet4epiQKoro point and transmitting its signal, the first point being monitored will receive, with some time delay, with the integrated signal of the input signal, the return signal from the second point being monitored. The video signal from the output of the Receiver 6 through the switching unit 7 enters the .adine from 1 input | B of the pausing generator / 7. After

The video signal is terminated from the receiver 6, the gap former generates a pulse of a certain duration and delivers it to one of the driver's inputs and pulses 1 and to the D other blocking input of the switching block 7. During the operation of the driver, the blocker pauses the switch to be blocked than the effect of the direct pilot signal on the pause driver is eliminated. Upon termination of the action of the impulse on the formiroforl}, it transmits the signal of transmission. The lock interlock from the imposer “chips”, placed on the switch unit 7, switches on the effect of its own leverage signal on the operation of the opener 1J. Thus, the total duration of the pause should be greater than or equal to

in

Analogue, pich; but the next signal of the second controllable signal occurs; step 1, when receiving the reverse control signal from the third controlled point after receiving the stern P | mto signal from the first cathodic protection station, then forming the inepiBoro transmission signal. Signal formation is carried out by all controlled points. The effect of subsequent direct signals on the tele.ntrol device of all monitored cathodic protection stations is prevented by blocking operation of the switching unit with 7 signals from the pause generator // and pulse generator 1.

Upon termination of the return signals from subsequent monitored (points, the telecontrol device ensures that the circuit is restored to its original state ready (To receive a "direct signal from the previous cathodic protection station. After the end of reception and transmission of the control signal, the forbidden signals are removed in the prohibition block 12 from the receiver 6 - pulse generator

I.C of the memory block / C, after it is triggered, a permission signal is sent to the prohibition block 12, which ensures that the prohibition block can function after the first control signal has been transmitted as a result of the reception of the first direct signal from the previous point.

If IB is the flow of time provided for receiving a reverse signal and the receiver’s input does not receive a signal, the prohibition unit 12 sends a prohibition signal to the silencer

II, which ensures that the latter is disconnected from the action of the receiver 6. Then, after a time that blocks the next direct signal from the previous monitored item, the prohibition unit 12 delivers "and the memory block 10. The memory block returns to" a similar position and terminates to block the signal of the switch on the switching unit 7 and the signal to the gap generator 11. Now the switch to the switch restores the possibility of the signal passing from the receiver 6 through the switching unit directly to the driver pulses /, and the gap former // returns to its original position, eliminating the effect on it of a signal from the receiver output through the switching unit. The circuit is prepared to receive the first pilot signal from the previous cathodic protection station in the new polling cycle.

During the reception of the return signal, when the pause driver starts to operate, a signal is sent from one to the one of the blocking inputs of the installation unit, thus preventing the functioning of the prohibition unit 12 after receiving the return signal.

At the last station of cathodic protection, the device is somewhat more trivial, since its function consists in generating and transmitting a control signal after receiving the direct signal, and then blocking the logic for the time excluding the effect of the second return signal from the penultimate controlled point, formed by receiving the inverse of the last one. Here, the control signal is formed after receiving the first control signal, as well as on all the stations (Cathode protection section. After the transfer is completed, the shaper 11 is started from the pulse shaper /. The dimmer supplies the blocking signal to the switching unit 7. For a time the silna switching unit eliminates the passage of the control signal from the receiver 6 to the driver and pulses L

At the control point, feedback pulses are received from the first control point. After transmitting the interrogation signal, the decoder 8 is reset to the initial position of the signal 1M from the pulse former. First item to be controlled

, - transmits a pilot signal pulse to the control point after receiving the signal from the remote control point, then it transmits a pulse each time it receives a return signal from the second cathodic protection station.

, Q In the control unit's device, the signal from the receiver: 6 through the switching unit 7 enters the decoder 8, which counts the pulses and forms a signal as a result of the decryption of the received pulse train after the polling pulse. The signal from the decoder will be sent to the signaling unit 9, which signals, indicating the number of the malfunctioning station by the cathode protection. The process of polling cathodic protection stations and receiving signals at the control room is shown in the time diagram. An arrow with a chip (they have shown that direct signals are not used.

Preface and Record

A device for telecontrol of cathode stations is sewn up along a pipeline channel, containing a receiver at the control room and each controlled point, the input of which

connected to the pipeline, a cathodic protection station connected through the modulator to the pipeline, a generator, the output of which is connected to one of the inputs of the modulator, a switching unit, one of the inputs of which is connected to the output of the pulse carrier, at the dispatching point deshi (|) A rator, one input of which is connected to the output of the imaging device, pulse, and a safety unit, the input of which is connected to the output of the decoder, c on each controlled launch of the pause driver, the output of which is connected to the output of the transmission unit, which differs m, which, in order to improve the device’s operational reliability, it contains interconnected at all controlled points

the block .- is bored with the blocks of tees, the inputs of which are connected to the outputs of the pulse former, the output of the memory block is connected to - corresponding to | The inputs-and

Former of the pauses and the Pe1switched-and block, the output of the receiver is connected to the input of the prohibition block, the output of the prohibition block is connected to the input of the for-1m1irovatel-pau-Uz, and on the last controlled point the output of the forminator

impls connected to the entrance of the shaper pause.