SU1283997A1 - Device for checking the switching modules - Google Patents

Abstract

The invention relates to telephony. The purpose of the invention is to increase the speed and completeness of the control. The device contains a switching module 1, consisting of a switching field 2 and control 3, two switches 4 and 5, two distributors 6 and 7 pulses, r-r 8 pulses, a display unit 9, consisting of two indicators 10 and 11 graduation

Description

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The Research Institute of testing cycles and 12 display boards with identical cells, as well as a control unit 13 consisting of a waiting multivibrator 14, a trigger 15, an electronic key 16, ... an OR 17 element and three E 18, 19 and 20 The verification process of switching module 1 consists of two cycles. In the first cycle, the contacts of the control unit 3 (reed switch) are checked.

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The invention relates to telephony and can be used to test switching modules (matrices) in the production and operation of matrix connections, for example, reed switches, etc.

The purpose of the invention is to increase the speed and completeness of the control.

The drawing shows the electrical structure of the device.

The device for testing switching modules contains switching module 1, including switching field 2 and control element 3, first and second switches 4 and 5, pulse distributors 6 and 7, pulse generator 8, display unit 9 including two test cycle indicators IO and I1 , and display 12 display with identical cells, control unit 13, which includes multivibrator 14, trigger 15, electronic key 16, element OR 17, first, vtsgroy and third elements And 18, 19 and 20. At the same time, each identical cell of board 12 is filled on optical interconnected by light and control indicators (not shown)

The device works as follows.

At the moment the supply voltage is applied, the distributors 6 and 7 are reset, at which the signal 1 is set at their first outputs. The trigger 15 also assumes the initial state, at which a zero signal is applied to one of the inputs of the element And 18, prohibiting the passage of an impulse closure, and in the second cycle, sticking contacts are detected in the switching field 2. The goal is achieved by introducing the distributors 6 and 7 pulses, through which the complete verification process of module 1 is carried out, as a result of which From the contact information about the state of the contacts and in the form, it is convenient for perception. 1 il.

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The oscillator b is sent to the input of the distributor 7 via the element OR 17, and the enable signal (1) is sent to one of the inputs of the element 20 from the trigger 15.

From the first distributor 6 a positive signal, i.e. 1 is not going anywhere, since this output is not connected. But from the first output of the distributor 7, a positive polarity signal arrives at one of the inputs of the electronic key entering the switch 5. The key is open, but the reed switch entering the switching module 1 (control element 3) does not work, because the electronic the keys entering switch 4 are closed (no signal is received from the first output of the distributor 6), and the reed switch is supplied with power only through horizontal rails.

As soon as the first pulse of the generator 8 passes through the element AND 20 to the input of the distributor 6, the last one is triggered and a positive signal 1 appears at its second output. This opens the electronic key entering the switch 4, the base of which is connected to the second output of the distributor 6 and since at that time the electronic key entering the switch 5 was already open, the reed switch (in control element 3), which turned out to be at the crossroads of the first horizontal and first vertical busbars, is activated (switched on). The contacts of the reed switch are closed.

As soon as the contacts are closed, a positive signal from the horizontal enters the corresponding vertical

Calc, which is connected with the input of the indicator cell, which is part of the board 12 and forms, in combination with other similar cells, the board as a whole. In this case, the current passes through the LED of the optocoupler and, as a result, the corresponding indicator light on the board 12 lights up.

This indicates that a certain reed switch has worked and its contact is closed.

As soon as the second pulse arrives at the input of the distributor 6, the last one triggers and at its third output a positive signal appears, which is fed to the subsequent electronic key entering the switch 4. At this, the next reed switch operates, and if its contacts close, then at the appropriate place on the display panel 12 of the display, the corresponding cell indicator lights up. When the following pulses arrive at the distributor 6 input, the electronic switches of switch 4 are sequentially turned on, providing alternate switching on the reed relays, and if their contacts are closed, then the lamps of the corresponding indicator cells, i.e. The valve 6 according to the impact of clock pulses of the hetrator 8 provides for alternately connecting the reed relays in the switching module) to the first horizontal. When a positive signal (1 appears at the control (last) (P-1-2) output of the distributor 6, this signal coincides with the signal of the generator 8 at the input of the element I I8 and, having passed the element OR 17, causes the distributor 7 The positive signal disappears from the first distributor 7 code, but appears at the second distributor 7 output. This turns on the subsequent electronic key entering switch 5 and prepares a circuit for switching the reed relays to the second horizontal in the control element. 3 In addition, positive sig al with the second outlet of the distributor 7 is provided to the commutation second horizontal floor 2. Under the influence of the next clock pulse distributor 6 is activated, a positive output signal disappears P +

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and appears at the first exit. Under the influence of the next pulse, the distributor 6 triggers again and a positive signal appears at its output. Again the reed switch is turned on, but already connected to the second horizontal. If the contacts are closed, then the indicator is in the appropriate place on the display panel 12 of the display.

The distributor 6 under the influence of clock pulses again alternately sends a positive signal to the electronic keys in switch A, ensuring their sequential switching

and reed relays connected to the second horizontal. If the contacts are OK, the indicators light up. When a signal occurs at the output of the P + 2 distributor 6, then the distributor 7 is triggered again by one step and sends a positive signal to the next horizontal (third), and then the distributor 6 provides for switching on the electronic switches in switch 4, one by one, and for switching on the reed switches .

This operation (when the distributor 7 takes one step, and the distributor 6 runs through its steps) continues until the distributor 7 provides alternate connection of a positive signal to all horizontal meters in the control element

LLL 3 and also in the switching field 2. In this case, all the reed relays included in the switching module 1 turn on alternately and the indicators of the board 12 are turned on. Where the reed switch contacts do not close, the corresponding indicators do not light up.

Thus, when all relays are connected in series, the state of their contacts will be displayed on the display 12 (when all relay contacts are activated, all the indicator lights on the display, and if individual contacts fail, the corresponding indicators do not burn) , positive signal according to the last (control) output () of the distributor 7.

Under the influence of this impulse in the device, trigger 15 is activated and sends a signal of misalignment to one of the inputs of the element I 18 and to one of

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inputs of the indicator 11, and the input of the element And 20 of the indicator 10 receives a ban (O). In addition, the pulse from the P + 1 output of the distributor 7 causes the waiting multivibrator 5 14 to work. A positive signal from its output goes simultaneously to the second of the inputs of each indicator 10 and 11.

But since the first input of the indicator 11 already has a positive signal from the trigger 15, a positive signal appears at its output. In addition, a positive signal from the output of the standby multivibrator 14 is fed to the prohibiting input of the generator 8. The generator 8 and the distributors 6 and 7 stop their operation.

The indicator is lit for the time specified by the wait time.

the key closes depends on the capacitor capacitance and the resistor included in the electronic key 16.

As soon as the electronic key 16 is closed, the thyristors supply circuit in the optocouplers of the indicator cells of the board 12 is cut off and the indicators go out. The display 12 is ready to receive the following information as soon as the electronic key 1 is opened.

Now, the second stage of the module verification. Alternately, from the distributor 7, a positive signal is given to all horizontals of the switching field 2. But since distribution 6 does not work (and on its outputs O, since it stopped in the position (P + 2) due to the fact that

the multivibrator 14, the signal 20 of one of the inputs of the element I 20 is given that the first test cycle (the cycle prohibiting the signal from the trigger 15), the contact closure test has ended.

then the starting pulses from the generator to the input of the distributor 6 do not pass, but then they pass to the input 25 of the distributor 7. Thus, the electronic keys of the switch 4 do not work, which means that none of the reed switch does not work, although their conclusions, connected to the appropriate; zimi horizontals, power is supplied (the relay is connected via switch keys and to the minus power bus).

The dwell time of the multivibrator 14 must be such as to ensure that the information is removed from the display 12, since during this time the indicators are hot at the intersections where the contact is closed and not hot where the contacts have not closed. Thus, the state of the contacts of the switching matrix is presented in boldly (module 1

Muttsii): the indicator is on - the corresponding matrix contact is closed, the indicator is off - the corresponding contact is not closed. After the end of the time delay, the pending multivibrator 14 returns to its original state and thereby enables the operation of the generator 8.

In addition, when a positive signal appears at the output of the standby multivibrator 14, the capacitor included in the electronic switch 16 is charged. The charging current passes from the output of the waiting multivibrator 14 through a capacitor, the base-emitter transition of the transistor — the electronic switch 16 to the common bus (the transistor state has not changed since it was already open, and the degree of its saturation increased) But as soon as the pending multivibrator 14 returns to its original state, a zero appears at its output, and the electronic key 16 is briefly buried. Time at which

the key closes depends on the capacitor capacitance and the resistor included in the electronic key 16.

As soon as the electronic key 16 is closed, the thyristors supply circuit in the optocouplers of the indicator cells of the board 12 is cut off and the indicators go out. The display 12 is ready for the following information as soon as the electronic key 16 is opened.

Now the second stage of the module verification is taking place. Alternately, from the distributor 7, a positive signal is given to all horizontals of the switching floor 2. But since the distributor 6 does not work (and O on its outputs, since it stopped at the position (P + 2) due to the fact that

one of the inputs of the element And 20 filed prohibitory signal from the trigger 15),

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then the starting pulses from the generator B to the input of the distributor 6 are not passed, but they are then passed to the input of the distributor 7. Thus, the electronic switches of switch 4 do not work, which means that no reed switch does not work, although their conclusions, connected to the appropriate; zimi horizontals, power is supplied (the relay is connected via switch keys and to the minus power bus).

On all the horizontals of the switching field 2, in turn, from the distribution-7, a positive signal is received. But since none of the reed relays are triggered, their contacts therefore do not close, and no indicator of the board 12 lights up.

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But if there is a stuck contact (meaning the relay contacts that remain closed when the coil of this relay is de-energized), then on the board 12 the indicator lights up which shows what relay it is in. stuck contact.

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After the complete completion of the second 50, test cycle (test cycle for the contacting of the relay contacts), a signal appears at the output P + 1 of the distributor 7, and the indicator 10 is activated, which lights up to 55 s, meaning that the full test cycle has ended. At the same time, the display 12 will be full of information on the presence and location of sticking so. Thus, the testing process of the switching module consists of two cycles.

In the first cycle, we check the relay contacts for a short circuit. A sticking contact in this cycle cannot be detected, since all the closed contacts (including the sticking ones) light the indicators of the corresponding cells in the table 12.

In order for you to make a stuck contact, the reed switch must be de-energized and check their contacts for opening. Consequently, if in the switching field 2 there is a stuck contact, then in the second test cycle we reveal it.

Thus, after a complete check of the module, we have complete information about the state of the contacts of the relay in the com-20 inputs of all elements AND the combined field 2. If necessary, this information can be transferred to a previously prepared standard table, and this switching module together with the table sent for repair, and the verification process for other switching modules continues.

Working with a table (transferring information from board I2 to a table) actually reduces to the fact that the table is superimposed on board 1 2 after the end of the next test cycle and in the cross it marks are made, for example. measures, different signs on the presence of the following malfunctions: sticky contacts (contacts, remaining

with the coils closed after the breakdown, the coils corresponding to these contacts of the relay); permanently open contacts (contacts that remain open and closed, regardless of whether they are de-energized or under the current of the relay, corresponding to these contacts).

As a result of the check, there is a plethora of information about the state of contacts in a form that is convenient for perception.

Claims (1)

Invention Formula A device for testing switching modules, comprising a pulse generator, a control unit, the first output of which is connected to the input of the pulse generator, first and second switches, a display unit and a switching module including a switching field and a control element whose inputs are connected to the corresponding inputs of the second switch characterized by the fact that in order to continue (with the effect and completeness of control, two pulse distributors are introduced, the information outputs of each of which are connected to the inputs of the corresponding switch, and the clock inputs are connected, respectively, to the second and third outputs of the control unit, the control outputs each pulse distributor is connected respectively to the first and second inputs of the control unit, made in the form of a waiting multivibrator, a trigger, an electronic key, first, second, and third elements, OR, the first and second inputs connected respectively to the outputs of the first and second AND gates, per- ; 25 thirty These are the third input of the control unit, which is connected to the output of the pulse generator, the input of the standby multivibrator is connected to the combined inputs of the trigger and is the second input of the control unit, the output of the standby multivibrator is the first output of the control unit, the first output of the trigger is connected to the second input third element And, the output of which is the second output of the control unit, the second output of the trigger is connected to the second input of the first element AND, the output of the OR element is the third output of the control unit, the input of the electronic switch is connected to the output of the waiting multivibrator, and the output is the fourth output the control unit, the fifth and the second outputs of which are, respectively, the first and second outputs of the trigger, the second input of the second element I is the first input of the control unit, wherein the display unit is made in the form of two indic40 45 control end cycles and display boards with identical cells, each of which is made on optically linked light and control indicators, the control indicator is connected between the respective vertical and horizontal tires in series with the corresponding controlled contact of the switching field, the combined first and second outputs of the light indicators through electronic key control unit 9li ajyy / lu connected to the common bus, the vertical control element of which the connecting buses of the display panel are connected to the corresponding outputs with the corresponding buses of the elementary switch, the first, the fifth and the control of the switching module and the sixth outputs of the control unit of the second switch, inputs 5 are on to the corresponding inorganic compound; with the corresponding indicators of the end of the cycles, the commutation field Tires of the module for checking the indication-switching unit, horizontal busbars.