SU1378069A1 - Apparatus for monitoring signal transmission line - Google Patents

Abstract

The invention relates to telecommunications. The purpose of the invention is to improve the accuracy of control. The device contains 1 mbdulor 2, band-pass filter 3, 4 signal analyzer, 4 control signal generator (CS), 6 command sensor, gr.7 CSS at the serviced amplifying point (GCC), and at each unattended amplifying point ( LLP) 14: -14 — r-r 15 linear signals, control block 16, fault sensors 17, -17, r-18 notification signals. In addition, the sets of 20, -20 linear paths equipment contained in the SLL 14 are presented, containing on the OUP 1 terminal 21 and the output 22 of the signal of the control frequency channel, as well as those available between the OUP 1 and the OUP 14 remote control channel 23, remote signaling channel 24 and linear paths . In order to increase the accuracy of control, they were introduced on the OUP 1 unit 8, detector 9, counter 10, triggers 11, 12, multiplexer 13, and on each NUP 14 — key 19. Almost all the units of the device are monitored, since The algorithm of operation is similar to the algorithm for localizing the failure of linear paths. 4 il. about cl

Description

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The invention relates to telecommunications and can be used to monitor transmission lines sealed by frequency division systems.

The purpose of the invention is to improve the accuracy of control.

Fig. 1 shows a structural electrical circuit of the proposed device; in fig. 2 shows an example of implementation of a control signal generator; in fig. 3 - example of the implementation of the counter; Fig, 4 is an example implementation of a signal analyzer.

The device for monitoring the signal transmission line (Fig. 1) contains on the serviced amplifying point (GCC) 1 a modulator 2, a band

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H5TI 4. The notification signal supplied from the generator 18 to the remote signaling channel 24 through an open (electronic) key 19 is fed to the junction block 8 and then to the modulator 2. The control input of the modulator 2 from the generator 7 of the control signals is alternately fed to control signals that differ in frequency. The formation of the control signals at the output of the generator 7 occurs on the basis of the master oscillator 26 and the frequency divider 27 (Fig. 2). The signals of different frequencies from the information outputs of the divider 27 are fed to the inputs of the switch 29, which is controlled by the shift register 28.

At the outputs of register 28 in turn

filter 3, analyzer 4 signals, the shape is 20 °, the control signal appears in

form 1 under the influence of clock pulses coming from the clock output of the divider 27. Thus, at the output of the switch 29, signals alternating in frequency alternately appear (through the electronic key 30 to the second output of the generator 7 and then to the control input of the module) To a torus 2. Each controlled LLP 14 corresponds to a control signal, which, with a notification signal of this LLP, forms an intermediate -frequency signal. This signal is extracted by a bandpass filter 3 and sent to detector 9. At the output of detector 9, m, a constant signal 1 is generated, Thus, using these blocks, as well as the driver 5 and the flip-flops 11 and 12, a continuous functional control of the transmission line is carried out.

world 5 control signals, sensor 6 commands, control signal generator 7, isolation block B, detector 9, counter 10, first 11 and second 12 triggers and multiplexers 13, and on each unattended amplifying point (LB) 14 - 14 " - generator 15 of linear signals, block 16, controls, malfunction sensors 17, -17, generator 18 of notification signals and a key 19 .. In addition, FIG. Figure 1 shows the sets of linear path equipment contained in LLL 14, contained at the EMS 1 terminal 21, the control signal channel output 22 of the control frequency, as well as the remote control channel 23, the television signaling channel 24 and the linear paths. The generator 7 of the control signals (Fig. 2) consists of the master oscillator 26, the frequency divider 27, the shift register 28, the switch 29 and the key 30, the counter 10 (Fig. 3) consists of the counter-decoder 31, the element OR 32, Inverter 33 and element 34, and the 4 signal analyzer consists of a processor 35, a synchronizer 36, a persistent storage device (ROM) 37, a random access memory (RAM) 38, five port 39-43, and a controller 44 interrupts.

The device works as follows.

Each of the generators 18 of the notification signal is tuned to a specific frequency, corresponding to this data.

A 0 ° control signal appears in

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form 1 under the influence of clock pulses coming from the clock output of the divider 27. Thus, at the output of the switch 29, signals alternating in frequency alternately appear through the (electronic) key 30 to the second output of the generator 7 and then to the control input modulator 2. Each controlled LLP 14 corresponds to a control signal, which, with a notification signal of the LLP 14, forms an intermediate -frequency signal. This signal is separated by a band-pass filter 3 and sent to detector 9. At the output of detector 9, a constant signal 1 is generated. Thus, with the help of these blocks, as well as the driver 5 and. flip-flops 11 and 12 provide continuous functional control of the transmission line.

For diagnostic control, there are three modes of operation: cable control mode and LLP tank; re-control of linear paths; self control mode.

Each of these modes is entered automatically.

The control mode of the cable and tank is established in the event of a malfunction of one of these components. Such a condition of the SCC or cable is considered as faulty, in which at least one of the sensors of the malfunction is triggered on any of the SCC 14. Each of the I7 sensors corresponds to a certain nature of the faulty one.

te, for example, opening the hatch of the NLB,. water in NUP, pressure drop in cable, etc. Under the influence of the sensor 17, the nature of the signal of the notice at the output of the generator 18 of the signal of notification 18

Depending on the nature of the fault, the normal (sinusoidal) signal of the generator 18 is modulated by pulses of a certain duration. In this case, an amplitude-amplified signal is fed to the input of the detector 9. At the output of detector 9, which highlights the envelope, instead of a constant signal 1, a sequence of pulses is received at the first input of counter 10.

Counter 10 counts the number of incoming pulses, which depends on the nature of the fault. The resolution to the counting is carried out under the influence of clock pulses (falling edge), coming from the third output of the generator 7 control signals. These same clock pulses are controlled by a command sensor 6, the output of which is set. the corresponding code combination characterizing the number of the LLP under control .14. In this case, the code combination is established synchronously with the supply of the corresponding control signal to the modulator 2 due to the supply of the same clock signals from the divider 27 to the register 28 and to the sensor 6. When the next clock pulse (leading edge) arrives at the counter 10 from the second output counter 10 receives a request signal in the form of I to the third input of the analyzer 4. The request signal is generated using an element 32, an inverter 33 and an element 34. The analyzer 4, when it receives a request on the third input, records data on the first and second inputs, respectively, about the number of the faulty LLP 14 and the nature of the fault. Upon completion of the recording, the analyzer 4 generates a reset signal from the second output to the counter 10 and the data output to the terminal 21, then stops the service and returns to the request waiting mode, and the counter 10 returns to the initial state.

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The control mode of the linear paths is established when the control signal frequency is input from the output 22 to the trigger input I. The control frequency channel (not shown) is connected to the common output of optical or acoustic signaling units of serial banners in the LAC SUP, which fix the loss of control frequencies. At the same time, the output of the trigger 1I sends a request signal to the fourth input of the analyzer 4. When this signal appears, the analyzer 4 records data on the first input about the number of the LLL currently monitored. With the arrival of the next clock pulse from the sensor 6, the first output of the analyzer 4, a control signal appears that changes the mode of the control signal generator 7. The control signal from the analyzer 4 switches the (electronic) key 30 of the generator 7 in such a way that the control signal, varying in frequency, from the switch 29 is fed to the first output of the generator 7 and further to the remote control channel 23. The second output of the generator 7 in this case comes from an additional output of the divider 27 linear carrier of a constant frequency. The control signal from the first output of the generator 7 is received by the control unit 16. Each control unit 16 is tuned to a frequency corresponding to the LLP 14. The output from the control unit 16 starts a generator of 5 linear signals connected by outputs to the linear paths 15. The generators of 15 linear signals at all controlled LLP 14 are tuned to the same linear frequency usually located outside the linear spectrum of the multichannel transmission system, and started alternately, starting with LLL 14 /.

From the additional output of the linear signal generator 15, when it is started up, a prohibition signal is applied to the (electronic) key 19, which goes into the closed state, disabling the output of the notification signal generator 18 from the remote signaling channel 24. The additional output of the linear signal generator 15 is a common point of its main outputs}.

which are separated from each other by decoupling elements, e.g. resistors.

If the linear path pa device is working properly on this LWN.14, the linear signal through the corresponding set 20 and linear path 25 is fed to the information input of multiplexer 13. In case of damage of one of the sets 20 of linear path equipment 25, the signal to the input of multiplexer 13 follows the corresponding linear path 25 does not arrive. The control input of the multiplexer 13 comes from analyzer 4 (third output) to the address code sequence corresponding to the given linear path 25. All linear paths 25 connected to the information inputs of the multiplexer 13 are sequentially interrogated. the time interval between two adjacent clock pulses from the generator 7 control signals, i.e. does not exceed the time control of one LLP 14.

The linear signal from the output of the multiplexer .13 is fed to the second input of the 8 isolation unit. Next, the linear signal is fed to the information input of the modulator 2, where, together with the linear carrier, from the generator 7 of the control signals, an intermediate frequency signal is generated, separated by a bandpass filter 3. If there is an intermediate frequency signal, the output of the bandpass filter 3 is from the output of the detector 9 to the first. input of the counter 10, in the absence of a signal - O. The counter 10 receives the resolution to the counter via the third input from the analyzer 4.

When the signal O at the first input of the counter 10, the latter generates a request signal that arrives at the third input of the analyzer 4. If a fault occurs on one of the LLP 14 from this LUP 14 and from all subsequent NUP 14, the linear signal along the corresponding linear path 25 does not arrives, which causes the presence of a signal O at the input of the counter 10 during this time interval. When a request signal arrives at the third input to the analyzer 4, it records data

a failure of the linear path 25 and proceeds to polling the next linear path 25. At the end of the survey of all linear paths 25 of one LLP 14, the linear paths 25 of the next LLP 14 are polled. At the end of the survey of all LLP 14, the analyzer 4 generates a reset signal that returns a trigger 11 in the initial state, removes the control signal from the first output and outputs the recorded data to the terminal 21.

Periodically, at certain predetermined time intervals, for example, 1 time per day, the device is set to self-monitoring mode. The installation period in the self-control mode is determined by the driver 5 under the influence of clock signals received from the third output of the generator 7. At the moment of transition to the self-control mode, the driver 5 sends a switch signal to the trigger 12, which generates a request signal to the fifth input of the analyzer 4. Analyzer operation algorithm 4 in this case is similar to the algorithm for operating in the linear paths control mode 25. Since the probability of a malfunction of the linear path 25 during the self-control mode is negligible, the analyzer r 4 in this mode monitors the serviceability of the device unit. For example, the absence of a linear signal from one of the LCP 14 in the self-monitoring mode indicates a malfunction of the corresponding generator 15 linear signals. Self-control encompasses almost all blocks of the proposed control, since the algorithm works similarly to the algorithm for localizing fault linear paths.

Claims (1)

Invention Formula A device for monitoring a signal transmission line, comprising a serially connected modulator and a band-pass filter at a serviced amplifying point, a serially connected command sensor and a signal analyzer, a driver of control signals and a generator of control signals whose first, second and third codes are connected respectively to the input of the telecontrol channel, to the control input of the modulator and the sensor input of the commands connected to the input of the driver of control signals, and at each unattended amplifying point there are fault sensors, the outputs of which are connected to the corresponding inputs of the notification signal generator, and sequentially connected control unit, the input of which is connected to the outputs of the telecontrol channel, and the linear signal generator, the outputs of which are connected to the inputs of the corresponding linear paths, characterized By the fact that, in order to increase the control accuracy, a multiplexer, an isolation unit, first and second triggers and a series-connected detector and counter are introduced at the serviced amplifier point, and a switch at each unmanaged booster point, while the output of the bandpass filter at the serviced amplifier point connected to the detector input, the first and second outputs of the counter are connected respectively to the second and third inputs of the signal analyzer, the first output of which is connected to the input of the control signal generator. (kdlokam5 6, y) FIG. 2 0 five 0 five 0 the third output of which is connected to the second input of the counter, the third and fourth of which are connected respectively to the first and second outputs of the signal analyzer, the third, fourth and fifth outputs and the fourth and fifth inputs of which are connected respectively to the control input of the multiplexer, to the reset inputs of the first and the second flip-flops, the terminal of the terminal of the served amplifying point, the output of the first flip-flop, whose signal input is the input of the signal of the control frequency channel, and the output of the second flip-flop, signal in D which is connected to the output of the control generator of control signals, the output of the multiplexer, the information inputs of which are connected to the corresponding linear paths, through the decoupling unit, the second input of which is connected to the output of the tele-alarm system, is connected to the signal input of the modulator, and at each unattended amplifier paragraph, the output of the notification signal generator via a key, the second input of which is connected to the additional output of the linear signal generator, is connected to the input of the remote signaling channel. (om§ff.) (Omffj.9) BxJ () Bjl. (O / nM (Unblocked) Bbixj Out, 2 / oZh1; fig.Z