SU1370627A1 - Device for checking and identifying cable cores - Google Patents

Abstract

The invention can be used to label and control cable cores. The purpose of the invention is to increase labor productivity in marking cable cores. The device contains 3.1 and 3.2 control units, each of which includes an amplifier 5 with local effect suppression, a microphone 6 and a telephone 7. Introduction of a switch 8 operating modes, keys 9 and 10, a sound generator 11 and two-terminal 4 and 12, which can serve as a resistor, a diode or a capacitor, allows switching the operation mode only once before identifying the cable cores and reducing the time lost to identify grounded conductors or conductors with leakage resistance. 5 3.p. f-ly, 2 ill. O) with about O)

Description

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The invention relates to instrumentation technology and can be used for marking control cable wires.

The purpose of the invention is to increase labor productivity in marking and monitoring cable cores by ensuring uninterrupted telephone communication between operators located in different rooms.

FIG. 1 shows a diagram of a device for monitoring and identifying cable cores; in fig. 2 is an amplifier circuit with local effect suppression.

A device for monitoring cable 1 with conductors 2.1-2. The P contains (Fig. 1) the first 3.1 and the second 3.2 identical control units, each of which contains a second two-terminal 4, an amplifier 5 with local effect suppression microphone 6, telephone 7, switch 8 operating modes, the first 9 and second 10 keys, the sound generator 11, the first two-terminal 12, the connecting terminal 13 and the terminal 14 for connecting the conductors 2.1-2.P controlled cable 1

FIG. 1 also indicates switching 15, opening 16 and closing 17 contacts of the switch 8 of operation modes.

Amplifier 5 with local effect suppression (Fig. 2) contains a preamplifier 18, a phase-inverse amplifier 19, a push-pull amplifier 20 with an output transformer 21, a resistor 22 and capacitors 23-25.

FIG. Figure 1 also shows a terminal 26 for connecting a housing of a monitored cable 1.

The first input of the amplifier 5 with local effect suppression is connected to the microphone output 6, the first output is connected to the first output of the telephone 7 connected by the second output to the common bus of the device. The second output of the amplifier 5 with local effect suppression is connected to the connecting terminal 13. In each of blocks 3.1 and 3.2 of the control, terminal 14 for connecting conductors 2.1-2.P of the monitored cable 1 is connected to the switching contact 15 of the switch 8 operating modes, M1 ) 1 which connects to ontact 16 which is connected to the control input of the first key 9, 1 the potential input of which is connected to the power supply tin of the device, and the output with the power supply terminal of the sound generator. pa 1 1 connected to about

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device bus and output with second input of amplifier 5 with suppression of local effect connected by power supply and common output with power supply bus and common device bus, third output through second bipolar 4 with output of second key connected by control input with output the first key, potential input - with a common bus device.

The device (Fig. 1) works as follows.

The identification of conductors 2.1-2.P cable 1, the ends of which are located in different rooms, are conducted by two operators using two identical blocks 3.1 and 3.2 controls, one at each end of the cable 1. The process of identification of conductors can be divided into two stages: the first - establishment of two-way telephone communication between operators via one of the wires of the 2.1 cable; the second is the identification of the remaining cable wires.

If it is accepted that the first operator works with block 3.1, and the second with block 3.2, then the sequence of actions of the operators, as well as the passage of electrical signals, are as follows.

1) The first operator sets the conductor for communication, for which connects terminal 26 to the cable body, connects cable 1 to one of the wires, for example, conductor 2.1, terminals 13 and 14, sets switch 8 to the position where contacts 15 and 16 are closed , turns on the power and waits for appearance

The phone has 7 tones.

2) The second operator searches for the specified communication core, for which connects terminal 26 to the cable body, sets the switch

8, block 3.2, to the position in which contacts 15 and 17 are closed, turns on the power supply, short-circuits terminals 13 and 14, and terminal 14 touches alternately the ends of 2.1-2.P. Until a tone signal appears in the telephone 7.

Blocks 3.1 and 3.2 while working as follows. At the moment when the second operator touched the shorted terminals 13 and 14 of the specified core 2.1, key 9 opens in block 3.1 by the appearance of the input current of this key,. by price: emitter, base, key entry

9- pins 15 and 16 of the switch 8- terminal 14 - conductor 2.1 - terminal 14 pins 15 and 17 of the switch 8, two-terminal 12 and terminal 26 of the unit 3.2 - cable housing terminal 26 of the unit 3.1. When opening the key 9, power is supplied to the sound generator 11, which begins to generate a signal with a frequency of 0.8 kHz. This tone is sent to amplifier 5, amplified, and from one of the outputs amplifier 5 goes to telephone 7 of the unit.

3.1, and from another output of the amplifier is transmitted to the telephone 7 of the block 3.2 via a circuit: terminal 13 of the block 3.1 - core 2.1 terminal 13 of the block 3.2 - output of the amplifier 5 and telephone 7 of the block 3.2. Simultaneously with the start of operation of the sound generator 11, the key 10 is opened in block 3.1, since unlocking voltage is supplied to its input through the public key 9. When the key 10 is opened, the two-terminal And shunt one of the outputs of the amplifier 5 to set the required signal level in the telephone 3.1. compared with the signal level in the telephone of the unit 3.2. (Details of the tone passing through the output parts of the amplifiers of both blocks are described when considering the operation of the amplifier 5). As a result, when the second operator finds the specified core in the phones 7 of both blocks, a tone signal appears.

The two-port 12 in block 3.2 is designed to prevent the terminals 13 and 14 from connecting to each other by shorting the communication line terminal 14 (core 2.1), through which the tone signal passes to the output of amplifier 5 and telephone 7 of the unit

3.2, while leaving the path for the passage of the input current key 9.

3) The first and second operators conduct telephone conversations. For this, when each of the 3.1 and 3.2 blocks in the telephone 7 indicates the moment when a given core is located, both operators disconnect the terminals 14 and the terminals 13 remain connected to the core 2.1. After that, the operators are convinced that each other’s hearing is heard, and they also agree on the number of the vein found and on the transition to the identification of the next vein. about

Blocks 3.1 and 3.2 at the same time work as follows. When disconnected, the pins of block 14 of the 3.2 breaks the circuit of the input current of the key 9, in block 3.1

9 closes, turns off the pit

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Kie sound generator 11, as a result of which the tone signal disappears in the phones 7 of both blocks. Operator conversations are the same in both directions. For example, the conversation of the first operator through the microphone 6 of the block 3.1 is amplified by his amplifier 5 and from the output of the amplifier 5 through the terminal 13 enters the telephone 7 of the block 3.2 in the same way as a tone signal. However, the signal to the telephone 7 of the block 3.1 is significantly weakened compared to the signal from the telephone 7 of the block 3.2 due to the action of the local effect suppression circuit, the operation of which is described when considering the operation of the amplifier 5.

The next cable core is identified by connecting the first operator of terminal 14 of the block 3.1 to the next cable core and searching for it by the second operator using terminal 14 5 of the 3.2 block until a tone signal appears.

The operation of blocks 3.1 and 3.2 when identifying veins occurs as described when searching for a conductor for communication, but when the second operator passes the next conductor, the input current of key 9 in the area from terminal 14 of the unit

3.1 to terminal 14 of block 3.2 passes through the newly found core, for example

along conductor 2.2, as shown in FIG. 1. The two-way communication between the operators operates continuously along the conductor 2.1, and upon further identification there lived the first and second operators only operate with terminals 14.

The amplifier 5 (Fig. 2) works as follows.

When the first operator talks, the speech signal from microphone 6 is amplified by amplifiers 19 and 20 and extracted in the output transformer 21.

When the sound generator 11 is in operation, the tone signal is amplified by amplifiers 18-20 and is also allocated in the output transformer 21. The output part of amplifier 5 is a differential system, which includes a transformer 21, a telephone 7 and a balanced circuit on elements 22 and 23. When connecting to terminals 13 and 26 of block 3.1 via a two-wire communication line (cable core - object body) of terminals 13 and 26 of the block

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A unit 5 of one unit creates a load in the form of the input resistance of the differential system of the amplifier 5 of another unit.

The signal flow in the differential system is simplified as follows. The sound signal current of the upper half of the secondary winding of the transformer 21 is closed in a circuit: capacitor 25 - terminal 13 of the unit 3.1 - core 2.1 - terminal 13 of the unit 3.2 - telephone 7 of the unit 3.2 - terminal 26 of the unit 3.2 - cable body - terminal 26 of the block 3.1 - telephone 7 of the block 3.1. The sound signal current of the lower half of the secondary winding of the transformer 21 of the block 3.1 is closed along the circuit: telephone 7, the balanced circuit on the elements 22 and 23 of the block 3.1. Thus, when transmitting signals from block 3.1 to block 3.2, the currents of the halves of the secondary winding of the transformer in the telephone 7 of the block 3.1 are directed oppositely and cancel each other. As a result, the signal is allocated in the telephone of block 3.2, and in the telephone of block 3.1, it turns out to be significantly weakened. The local effect is suppressed. This mode of operation of the di (}) interactive system is used in the transmission of a speech signal, i.e. when talking to operators.

The balance circuit on the elements 22 and 23 compensates in the range of conversational frequencies the resistance of the elements that load the upper half of the secondary winding of the transformer 21: the capacitor 23 compensates the capacitors of both blocks 24 and the link capacity, and the input resistance of the system 3.2 .

During the operation of the sound generator 11, a strong attenuation of the tone signal in the local telephone should not be, since both operators need to control the moment of the core presence as a tone signal, therefore at this time they are balanced) the circuit is shunted by a two-terminal 4 through a public key 10. the degree of unbalance di1 {x}) of the potential system and, accordingly, the volume level of the dial tone: in the telephone of block 3.1 relative to the signal in the telephone of block i.2.

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The capacitor 24 shrinks the effect of the link capacitance on the amplitude-frequency characteristic of the two-way path. The capacitor 25 is separating and serves to close the path to the input current of the switch 9 through the output transformer 21 when searching for a conductor for communication, as well as to protect the output from overvoltages at 50 Hz.

In order to establish the required volume level in the phone 7, depending on the level of external acoustic noise and depending on the amplification of the amplifier 5, due to the destabilizing factors, the device has a talk volume control placed in the amplifier 18 and a tone control knob, placed in the sound generator 11. The regulators act independently and do not affect each other.

Thus, due to the introduction of keys 9 and 10, the sound generator 11, two-terminal 4 and 12, and new connections, the labor productivity in monitoring and marking the cable cores with the help of the proposed device is increased. This is due to the following.

1) Switching the mode of operation is performed using switch 8 only once before identifying the cable cores or cable groups: the first Biiu i and the second operators place the devices of their devices in the Job Specification and Search for Welding positions, respectively. This reduces the number of actions that operators perform when identifying veins, thereby saving time and increasing user convenience.

2) In identifying the veins, there is a permanent two-way telephone communication between the operators, which allows them to quickly agree on their further actions in case of any malfunctions arising in the process of identifying the veins, especially if there are 1 faulty conductors (broken, grounded, or leakage). The presence of continuous communication contributes to increased operational efficiency and improved usability of the device.

3) Set the cores to limit the production of electrically active terminal 14, i.e. circuit voltage between terminals 14 and 2f, if present

In cable 1 of grounded conductors, the device responds with a tone signal, the sound of which, without being touched by the second operator of the cable core, is a warning of a faulty core. In this case, both operators may attempt to immediately identify the reason for the premature occurrence of a tone or the first operator marks this core and sets the next one for identification. The marked conductor (s) is checked at the end of working with the cable, since it will take less time to search for and find out the reason for grounding (leakage), since the remaining cable cores have already been identified. This makes it possible to reduce the time lost in identifying grounded conductors or conductors with leakage resistance.

4) The search for specified conductors is carried out by an electrically passive terminal 14 of block 3.2, i.e. when a circuit appears between terminals 14 and 26 of unit 3.2, it does not respond to this, so the second operator does not stay on grounded conductors or leaky conductors when searching for wires.

5) Operators in identifying cable cores always use the same terminals 14 for the same circuit between devices. This increases the usability of the device.

Claims (6)

1. A device for monitoring and identifying cable cores containing the first and second control units, each of which contains a local effect suppression amplifier connected to a microphone output by a first input, to a first output of a telephone connected to the device’s second output with a second output, The first connecting terminal, a terminal for connecting the body of the cable to be monitored, characterized in that, in order to increase labor productivity in marking and monitoring cable cores, eklyuchatel modes, two two-terminal network, an audio generator, a terminal for five 0 five 0 five 0 the key of the cable to be monitored, two keys, the second amplifier output with local effect suppression of the first control unit connected via a connecting terminal and a communication line to the first connecting terminal of the second control unit connected to the second amplifier output with interference suppression of the second control unit, in each of control units, the terminal for connecting the wires of the monitored cable is connected to the switching contact of the operating mode switch, the breaking contact of which is connected to the control input of the primary the key, the potential input of which is connected to the device power bus, and the output to the power supply of a sound generator connected to the common output of the device common bus, and output to the second input of the amplifier with local effect suppression connected to the power output and common output, respectively power supply and a common bus device, the third output through the first two-port network - with the output of a second key connected by a control input with the output of the first key, the potential input - with a common bus device, a terminal for connecting tim controlled cable housing connected to the common bus of the device, make contact switch modes coupled through a second two-terminal devices with a common bus. 2. The device according to claim 1, about tl and the fact that the line was controlled by the control 0 with moo zie is one of my cable 3. The device is somewhat Item 1, that is, the fact that the first two-port device is a resistor. 4. The device according to claim 1, TL and - with the fact that the first, two-pole is a diode. B. Apparatus according to claim 1, characterized in that the second two-port is a capacitor. 6. A device according to claim 1, wherein the second bipolar circuit is a resistor.