RU2797749C1 - Measuring unit of the system for autonomous testing of electrical equipment - Google Patents

Abstract

FIELD: computer technology.

SUBSTANCE: invention relates to the tools for control of electrical installation. A unit of the measuring system for autonomous testing of electrical equipment of products comprising a control panel made on the basis of a personal computer with a program control unit, an input-output and printing unit, a desktop for connecting the inspected system, a switching rack, an internal power supply connected to the control module, connected to the first and second switching modules, each of which comprises a shift register and switching elements, and additionally, a multimeter, a signal generator and a frequency meter, an expansion module and a time module are connected via cables to the power unit, and the multimeter, high-voltage voltage sources and the signal generator are connected via the expansion module to the control module, and the frequency meter is connected through the time module and the expansion module to the control module, whereas the time module is connected to the output of the internal power supply by the output.

EFFECT: improving the accuracy of monitoring the electrical installation of the inspected system.

1 cl, 3 dwg

Description

Technical field

The invention relates to radio electronics and computer technology, is intended for monitoring electrical installation, namely, checking the compliance of the object of control with its electrical circuit and can be used to monitor the presence of connections, closed contacts, the occurrence of short circuits, insulation resistance, control the parameters of the elements of the control object, control operation element when an acting voltage is applied, control of the presence of pulses with a frequency of 10 Hz and an amplitude of at least 2.6 V, control of a time relay.

State of the art

A known software and hardware complex for automated functional control of electrical mounting structures (patent RU No. 129281, IPC G06F 17/00, publ. a measuring unit, an external power supply unit with an automatic switch and an insulation breakdown control device, and an internal power supply unit. A computer was used as a workstation. The switching unit is equipped with a microprocessor controller with a control system and a programmable source of current and voltage, and the measuring unit is equipped with a voltmeter. The verification of the correct functioning of the product is carried out when the rated supply voltage (27 ± 0.5) V is applied to it and the voltage of the power sources changes in the range from 24 to 32 V.

The disadvantage of the known solution is the inability to check the correct functioning of the product when a high-voltage alternating voltage is applied to it, as well as the limited functionality due to the use of a voltmeter in the structure of the measuring unit.

A device for automated control of the electrical strength of the insulation of products is known, which is closest in essence to the claimed one and selected as the closest analogue (patent RU No. 146457, IPC G01R 31/02, publ. UK), a connector block (BS), a breakdown fixation unit (BFP), switching units (BC), each of which contains a shift register (SR) and switching elements, as well as an external power supply unit (BEP), an internal power supply (IVEP) and a high-voltage test voltage source (HIIN), a personal computer (PC) is used as a workstation, the BVEP is equipped with an automatic switch (AB), the VIIN is programmable, and the switching elements of the BC are made in the form of at least three high-voltage relays (VR) .

The disadvantage of the known device is the limited functionality due to the possibility of its use only for the purpose of controlling the electrical strength of the insulation of product circuits.

The main technical task is to implement the possibility of checking the electrical installation of electrical circuits for monitoring the presence of connections, closed contacts, the occurrence of short circuits, insulation resistance, monitoring the parameters of the elements of the control object, monitoring the operation of the element when an acting voltage is applied, monitoring the presence of pulses with a frequency of 10 Hz and an amplitude of at least 2.6V, time relay control.

The main technical result of the claimed invention is the expansion of functionality.

The technical result is achieved due to the fact that in the block of the measuring complex for autonomous testing of electrical equipment of products, containing a control panel made on the basis of a personal computer with a program control unit, an input-output and printing unit, a desktop for connecting an object of control, a switching rack, including connected through cables to the power block of an external power supply, high-voltage voltage sources, an internal power supply connected to the control module, connected to the first and second switching modules, each of which contains a shift register and switching elements, according to the proposed solution, additionally connected by cables to power block, a multimeter, a signal generator and a frequency meter, an expansion module and a time module, moreover, the multimeter, high-voltage voltage sources and the signal generator are connected through the expansion module to the control module, and the frequency meter is connected through the time module and the expansion module to the control module, while the time module outputs connected to the output of the internal power supply.

The claimed invention is illustrated by drawings, where in Fig. 1 shows its block diagram, Fig. 2 is a functional diagram of the operator's workplace, in Fig. 3 - its functional diagram, where are indicated:

1 - operator's workplace;

2 - switching rack;

3 - desktop;

4 - keyboard;

5 - mouse;

6 - printer;

7 - display;

8 - PC;

9 - source of internal power supply;

10 - multimeter;

11 - high-voltage voltage source;

12 - signal generator;

13 - frequency meter;

14 - expansion board;

15 - time module;

16 - control module;

17 - the first switching module;

18 - the second switching module.

The operator's workplace 1 includes a table and an operator's chair. On the table there is a control panel made on the basis of a personal computer 7 with an input-output and printing unit, which includes a keyboard 4, a mouse 5, a printer 6, a display 7.

The design of the control panel allows you to place the system unit of the control computer with an integrated controller, keyboard 4, mouse 5 and printer 6, display 7. The control panel is located in the immediate vicinity of the rack (or in the rack) and is connected to it with cables.

The switching rack 2 includes an internal power supply 9 connected to the power supply blocks 220 V 50 Hz, connected by a cable to the input of the control module 16; multimeter 10, high-voltage voltage sources 11, signal generator 12 connected via cables through expansion module 14 to control module 16; frequency counter 13, connected by cables through the time module 15 and expansion module 14 to the control module 16, the time module 15 is connected to the internal power supply. The first and second switching modules 17 and 18 are connected to the control module 16 using four-bus cables.

The control module 16 is made in a 19-inch block frame, it contains:

- upper connection board;

- lower connection board;

- input-output board;

- address selection board;

- device control board.

Two boards for controlling devices of the control module 16 form a block of four buses with an output to two connectors for connecting device contacts. Combining the outputs of the boards is made on the connecting board.

The control module 16 provides the choice of the switch of the first and second switching modules 17 and 18 and the board, with the relay of which the operation of installation on the bus or removal from the bus of the device is carried out.

Switching modules 17 and 18 are made in a 19-inch block frame, they contain:

- upper connection board;

- lower connection board;

- address selection board;

- switchboard.

The two switch boards form a four-bus array with two 32-out connectors.

Combining the outputs of the boards is made on the connecting board.

Switching modules 17 and 18 provide the ability to use a multimeter 10, a frequency counter 13 and supply voltages from high-voltage voltage sources 11 to the control object, allow you to connect any point of the board to any bus.

When measuring time intervals, a board for measuring time intervals is used, in the form of which the time module 15 is made.

To connect the test object, technological cables are used, which connect all the contacts of the product connector and, if necessary, the body of the product connector.

Switching racks 2 are made in the Euromechanics-19 standard. Movable support hinges of the rack allow you to move it for short distances on a flat surface.

Implementation of the invention

During the operation of the claimed invention, the supply to the control object of the acting voltages from the built-in high-voltage DC voltage sources 11 is provided.

Program control unit provides:

- preparation of tasks for the control of the product by describing the scheme of the product;

- preparation of tasks for determining the connections of the product according to the sample of the product;

- execution of the selected task;

- management and dialogue with the operator in the process of control;

- Testing the performance of the installation.

The program control unit is installed on the PC and is a WINDOW application called by the control operator and controls the I/O unit.

The control module 16 is located in the switching rack 2 and provides data input/output between the PC and the control module (MU) via Cable 1, receives ~220 V power, controls the connection of device contacts to the buses (device contacts are connected to the MU by Cable 2), and outputs control actions on switching modules via Cables 5, where the input-output board provides data input-output between the PC and the control module (MU) via cable 1 and issues control actions on switching modules via cable 5.

On the I / O board of the control module 16 are located:

- address register management scheme;

- address registers;

- control circuit for polarized switch relays.

The control module address selection board 16 provides the choice of switching modules 17 and 18 and the switch board, it contains:

- decoder for switching module selection;

- decoder for selecting the board of the switching module.

The control board of the control module 16 provides connection of 30 device contacts to buses 1 ... 4. It contains:

- cell selection decoder;

- four switch cells, each consisting of a decoder and 16 relays controlled by it.

Switching modules 17, 18 control the connection of the contacts of the control object to the buses.

The following boards are installed in switching modules 17 and 18:

- upper connection board;

- lower connection board;

- choice of address;

- switchboard.

The output of the switch is organized using the bottom connection board. It combines the outputs of two boards.

Switch module address selection board 17 and 18 provides module and switch board selection.

On the board are:

- decoder for switching module selection;

- decoder for selecting the board of the switching module.

The commutator board of switching modules 17, 18 provides connection of 64 contacts of the control object to buses 1…4, it contains:

- cell selection decoder;

- eight switch cells, each consisting of a decoder and 16 relays P1 ... P16 controlled by it.

The board for measuring time intervals of the time module 15 is designed to generate a pulse with an amplitude of 5 V and a duration determined by the START and STOP signals, it contains:

- schemes of registration of START signals;

- scheme of impulse formation.

The Keysight N5752A DC source was chosen as the high-voltage voltage source 11.

AKIP 3409-1 was chosen as the signal generator 12.

The Agilent 53131A frequency counter was chosen as frequency counter 13.

In the claimed invention, installation control is carried out:

- to determine the compliance of the electrical installation of the object being checked with its electrical circuit;

- to check the parameters, including the electrical resistance of the insulation and its electrical strength;

- to check the correct functioning by means of the actions of the operator at the request of the control program.

Determining the compliance of the electrical installation of the checked object with its electrical circuit is carried out by the ohmmeter method - the resistance of the connections between the points connected to the switch of the electrical installation circuit of the checked object is controlled. Control is performed using a multimeter operating in ohmmeter mode. The control is carried out at low levels of voltages and currents, which makes it possible to avoid possible damage due to manufacturing defects in the installation.

Check of isolation is carried out by a method of the voltmeter - an ammeter. The multimeter determines the leakage currents. In this case, voltages from a direct current source are applied to the circuits under test. Electrical circuits, the insulation of which must be tested, the points of application of the test voltage, its value, form and duration of exposure are indicated in the file containing the task for monitoring the object.

Before the insulation test operation, all circuits are connected to bus "1". Then the controlled circuit is disconnected from bus "1" and installed on bus "2", after which the resistance between buses "1" and "2" is controlled using a multimeter. At the same time, if the resistance between the tires is not less than the established tolerance, test actions are applied in the modes specified in the control program.

After checking the insulation, the controlled circuit is connected back to bus "1".

These steps are repeated for each circuit.

After checking all the circuits, the “points” are reset from the “C” bus.

To control the operation of the relay, the contacts of the relay winding are connected to buses "3" and "4", and the contacts that need to be checked for operation are connected to buses "1" and "2".

A multimeter is connected to tires "1", "2", and a source of acting voltage is connected to tires "3", "4". The voltage specified in the control program is applied, which is transmitted to the relay winding, and this leads to the operation of the tested contacts. This operation is fixed by a multimeter. The result is recorded in the protocol.

To check the time relay or the presence of a pulse of a certain frequency and amplitude, a frequency meter and a pulse generator are used instead of a multimeter, respectively.

Thus, in the invention, the solution of the problem posed makes it possible to achieve the claimed technical result, namely, to expand the functionality by implementing the possibility of checking the electrical installation of electrical circuits in order to control the presence of connections, closed contacts, the occurrence of short circuits, insulation resistance, control of the parameters of the elements of the control object, monitoring the operation of the element when an acting voltage is applied, monitoring the presence of pulses with a frequency of 10 Hz and an amplitude of at least 2.6 V, monitoring the time relay.

Claims (1)

The measuring unit of the complex for autonomous testing of electrical equipment of products, containing a control panel made on the basis of a personal computer with a program control unit, an input-output and printing unit, a desktop for connecting the test object, a switching rack, including high-voltage high-voltage power supplies connected via cables to the power block voltage sources, an internal power source connected to the control module, connected to the first and second switching modules, each of which contains a shift register and switching elements, characterized in that a multimeter, a signal generator and a frequency meter connected via cables to the power block are additionally introduced, an expansion module and a time module, wherein the multimeter, high-voltage voltage sources and signal generator are connected through the expansion module to the control module, and the frequency meter is connected through the time module and the expansion module to the control module, while the time module is connected to the output of the internal power supply.

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