SU761951A1 - Apparatus for monitoring insulation quality - Google Patents

Description

The invention relates to the field of electrical measuring equipment and can be used to create devices for monitoring radio and electrical technical devices for resistance and insulation strength.

A device for checking the parameters of electrical circuits is known, comprising a control unit, a measuring unit, an alarm unit and switches G1].

A disadvantage of this device is the complexity and low reliability with a large number of controlled circuits.

The closest to the proposed technical entity is a device containing a connection block, the outputs of which are connected to the inputs of a switch connecting points, which includes an amplifier and a relay, a measuring unit and a series-connected clock generator and shift register [2].

A disadvantage of this device is the complexity of controlling the formation of controlled circuits and low reliability.

2

The purpose of the invention is to simplify the formation of controlled circuits and increase reliability.

This goal is achieved by the fact that the device for monitoring the quality of the insulation, which contains a connection block, the outputs of which are connected to the inputs of the switch of connecting points, which includes an amplifier and a relay, a measuring unit and serially connected clock generator and shift register, is equipped with a com-. a mutator of arrays, including relays, amplifiers and OR elements by the number of monitored circuits, while the flip contacts of the array switch relay are connected to the corresponding point connection / commutator, fixed closing and fixed disconnecting switches

the measuring unit inputs, one of which is also connected to the high-order switch output of the point connection, the shift register outputs are connected through an IMI element connected in series and an amplifier to the winding input of the corresponding switch relay

761951

arrays, and the high-order output of the shift register is connected to the amplifier input of the switch connecting points, the output of which is connected to the inputs of all the windings of the switch connecting relay points.

To achieve this goal, the elements, OR of the array switch are made with the number of inputs per unit less than the corresponding digit of the shift register output, while the input of the ΐth element OR is connected to the output of the 3rd digit of the shift register, if-th digit of the sequence number ΐ- The second OR element, represented in binary code, contains one.

In addition, to achieve this goal, the relay contacts of the point connection switch are connected according to the scheme. matrix, while the fixed disconnecting contacts of the relay are connected to the corresponding columns, the fixed closing contacts of the relay are connected in rows and connected to the corresponding outputs of the point-connecting switch, and the flip-off contacts of the relay to its inputs.

The drawing shows a structural electrical circuit of the device.

It contains a switch 1 of arrays, which includes a relay with windings 2, amplifiers 3 and elements 4 OR, switch 5 connecting points, which includes a relay with windings 6 and amplifier 7, connection block 8, measurement block 9, clock generator 10 and register 11 shift.

The device works as follows.

In the initial state, monitored points, for example, isolated points and points of disconnected circuits (one from each circuit) of the printed circuit board, are connected to the switch 5 connecting points using the block 8, which groups the points to be monitored in columns, the measuring buses of the columns are connected to the flip-over contacts of the corresponding relay switch 1 arrays. The first pulse of the clock generator 10 records a unit in the first digit of the shift register 11, which entails the appearance of a signal at the outputs of logic elements 4 OR, associated with the outputs of the first digit of the shift register 11 and the corresponding relay of the block of the switch 1 arrays. The output buses of switch 5 of the connection points are broken into two arrays: in the array of worms with the help of switch 1 arrays are connected and connected

one terminal of measurement block 9, all measuring buses of columns that do not have a unit in the first digit of a serial number, represented in the binary numbering system, into a second array connected to another terminal,

all other tires. After switching rele''blokom 9 measurements performed and control resistance (strength or 1 electrical isolation between the two columns massiva5 E, m. E. Between two arrays of measurement points (at, d _Yeung controlled amount points?

each array contains 2 points interconnected with 10 power switches 1 and 5). The second clock pulse generator 10 shifts the unit from the first to the second digit of the shift register 11 and the measuring buses of columns, not ^ 5 having units in the second digit of the sequence number represented in the binary number system, are connected to the first array and connected to the first terminal of the block 9 measurements, measuring the remaining Con ^£ chayut bus to the second terminal of the measuring unit 9 and so on. d. After £ clock pulse generator 10, any two measuring columns tire, at least odnom'takte measurements were pod25 Cpd not connected to the opposite terminals of the measurement unit 9, i.e. between them, the resistance and / or strength of the electrical insulation was monitored.

30 When a (, E + T) th pulse is received from the clock generator 10, a unit is recorded in the first and in (ί + ΐ) bits of the shift register 11 (one in (¢ + 1) shift register register

35 is kept until the end of the product inspection). The appearance of a unit in the (£ + 1) discharge of shift register 11 triggers the operation of all the relays of the switch 5 connecting points, and the controlled points are grouped in rows,

“And the measuring lines of the strings are connected to the changeover contacts of the relay of the switch 1 of the arrays, after which t control operations are performed between the measuring tires

45 rows, similar to the control operations when grouping, controlled points into columns. Thus, for K pulses of the clock generator. K =

(£ + t) cycles) control is performed

50 resistance and (or) strength elek. tricky isolation between any two controlled points. The operation of the clock generator 10 is terminated after (£ + t) cycles.

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The device makes it possible to determine the validity or marriage of the object of control, but sometimes it is necessary to clarify the addresses of controlled points, between which there is a defect. For this, it is necessary to conduct a certain number of additional checks, which are carried out with the help of a microcomputer, to which the device is connected via connection unit 8. In this case, the search for addresses is carried out by the method of half 76,751.

shutdown after necessary measurements of that part of the array of control points where there is no defect.

15

Claims (3)

Claim 1. Device for monitoring the quality of the insulation, containing a connection unit, the outputs of which are connected to the inputs of the switch connecting the points, which includes an amplifier and a relay, a Measurement unit and a series-connected clock generator and a shift register, that is the same that, in order to simplify the formation of monitored circuits and increase reliability, it is equipped with an arrays switch, including relays, amplifiers and OR elements by the number of monitored circuits, 20 at the same time, the switch contacts of the arrays switch with are connected with the corresponding outputs of the switch connecting the points, fixed closing and fixed disconnecting 25 relay contacts are connected to the corresponding inputs of the measuring unit, one of which is also connected to the high-level output of the connecting switch points, the outputs of the shift register .30 are connected through the corresponding series-connected element OR and amplifier with the winding input of the corresponding relay of the array switch, and the high-order output of the shift register is connected to the input of the switch amplifier amplifier Points points, the output of which is connected to the inputs of all the windings of the relay of the point connecting switch. 2. The device according to claim 1, dated by the fact that the OR elements of the array switch are made with the number of inputs per unit less than the corresponding output of the shift register, and the input of the I-th element OR is connected to the output The 4th digit of the shift register, if the 4th digit of the sequence number of the ίth element OR, represented in binary code, contains one. 3, Device by π. 1, differing from the fact that the relay contacts of the point connection switch are connected according to a matrix ·, the fixed opening contacts of the relay are connected to the corresponding columns, the fixed closing relay contacts are connected to the lines and connected to the corresponding outputs of the point connection switch, and the flip-over relay contacts with his entrances.