SU1206730A1 - Arrangement for testing switching articles - Google Patents

Description

The control interval contains an NAND element, connected by the first second inputs to the same inputs of the block, output to the first input of the first And element connected by the second input through the first inverter to the third input of the block, output to the output of the block.

4. The device according to claim 1, characterized in that the blocking device for chattering of the opening contacts comprises a fifth pulse shaper connected by an input to the first input of a block connected by the second and third inputs respectively to the inputs of the second Element AND connected to the first input of the element OR- NOT connected by the second input to the fourth input of the unit, output to the first installation input of the second trigger connected by the second installation input to the fifth input of the unit, information input to the output of the fifth formatter sov, direct and inverted outputs, respectively, - the first and second block outputs.

5. The device according to claim 1, wherein the control unit comprises a pulse generator connected by a control input

f

The invention relates to instrumentation and can be used to control switching products, such as switches.

The purpose of the invention is to increase the credibility of the control result.

Figure 1 is a diagram of the proposed device; 2 shows time diagrams of its work; on fig.Z - timing diagrams of the blocking chatter blocking closure contacts

The device contains a blocking device 1 for blocking contact contacts, a block 2 for interval selection a control, a block 3 for blocking bounce for disconnecting contacts, a block 4 for control, a counter 5, a block 6 for indication, a first 7 and a second 8 for resistors, a second

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with the third input of the control unit; output to the first input of the third element I, connected by the second input to the first input of the control unit; output to the information input of the switch connected by the installation input to the second input. control unit, the first, second and third outputs, respectively, with the second, first and third outputs of the block.

6. The device according to claim 1, which is that the display unit contains the second and third inverters connected by the outputs, respectively, to the second and first inputs of the block, the outputs to the corresponding first installation inputs of the third and fourth triggers connected by the second the installation inputs with the third input of the block, the output of the fourth trigger is connected to the first input of the fourth element And connected by the second input to the inverse output of the third trigger, output to the input of the first indicator connected by a power output from the busbars power supply of the device and the power supply of the second indicator connected by the input to the direct output of the third trigger.

9, the third 10 and the first 11 inputs. Figure 1 also shows the controlled

product 12.

Block 1 blocking the bounce of the closing contacts contains the first 13, second 14, third 15, fourth 16 pulse shapers, the first trigger 17 and the element OR 18.

The interval selection block 2. The control (FIG. 1) contains an IS-NE 19 element, the first inverter 20 and the first And 21 element. The chatter blocking block 3 of the break contacts (Figure 1) contains the fifth pulse shaper 22, the second trigger 23, the second the element And 24 and the element WL-NOT 25.

The control unit 4 (FIG. 1) comprises a pulse generator 26, a third element 27 and a switch 28.

The display unit 6 (figure 1) contains the third 29 and fourth 30 triggers, the fourth element And 31, the second 32 and the third 33 indicators, the second 34 the third 35 inverters.

1 also shows the first 36, second 37 and third 38 outputs of control unit 4.

The first and second inputs of the blocking device 1 blocking the closing contacts are connected respectively to the terminals for connecting the disconnecting and closing contacts of the monitored product 12, the output is connected to the counting input of the counter 5 connected by the transfer output to the first input of the display unit 6 connected to the first input of the block 6 4 controls The terminal dp connecting the switch contact of the monitored product 12 is connected to the common bus of the device. The first and second inputs of block 1 of chatter blocking make contacts are connected respectively via the first 7 and second 8 resistors to the device power bus and directly to the first and second inputs of block 2 of the monitoring interval connected to the first input of block 3 of the jarring of jogging contacts connected to the second the input with the third input of the control unit 2 ejection interval and with the counting input of the meter 5, the third input with the second output of the control unit 4, the fourth input with the first installation input of the counter 5 and with the third output of the control unit 4, the first | And the second outputs, respectively, with the first and second inputs of the control unit 4 connected by the third input to the first input I1 of the device, the second input of which is connected to the third input of the bounce blocking device of the closed contacts, the third the input is with the second installation input of the counter 5, with the third input of the display unit 6 and with the fifth input of the block 3 of the chatter blocking of the break contacts.

In block 1, the blocking of the chipper contacts the inputs of the first 13 and second 14 pulse formers is connected to the first and second inputs of block 1, respectively, the outputs to the first and second installation inputs of the first

five

Q j 0 5 0

0

five

0

five

the trigger 17 connected to the direct and inverse outputs respectively via the third 15 and fourth 16 pulse shapers with the corresponding inputs of the OR 18 element connected to the output of the output of block 1 connected by the third input to the control inputs of the third 15 and fourth 16 pulse shapers.

In block 2 of the monitoring interval, the first and second inputs of the NANDI element 19 are connected to the same inputs of block 2, the output to the first input of the first element 21, connected to the second input through the first inverter 20 to the third input of block 2, the output to the output of block 2 .

In block 3 of chattering blocking of disconnecting contacts, the input of the first-forwarder 22 pulses is connected to the first input of the unit 3 connected by the second and third inputs respectively to the inputs of the second element 24, connected by the output to the first input of the element 21-2, connected by the second input with the fourth input of block 3, the output with the first setup input of the second trigger 23 connected by the second setup input with the fifth input of block 3, the information input with the output of the fifth driver 22 pulses, direct and inverse outputs corresponding with the first and second outputs of block 3.

In the control unit 4, the control control input of the pulse generator 26 is connected to the third input of the control unit 4, the output to the first input of the third element AND 27 connected by the second input to the first input of the control unit 4, the output to the information input of the switch 28 connected to the installation input the second input of the control unit 4, the first, second and third outputs 01, respectively, with the second, first and third exits blog. ka 4.

In display unit 6, the inputs of the second 34 and third 35 inverters are connected respectively to the second and first inputs of block 6, the output to the corresponding first installation inputs of the third 29 and fourth 30 triggers connected by second installation inputs to the third input of unit 6, the output of the fourth trigger

jQ is connected to the first input of the fourth element I 31 connected by the second input to the inverse output of the third trigger 29, the output to the input of the first indicator 33 connected by the power output to the power supply bus of the device and to the power output of the second indicator 32 connected by the input to the direct output third trigger 29.

The device works as follows.

The total time t4 is subject to control. switching contact product fig.Z)

t. t

H

H 4Aop

where t, - t is the time of bounce of the break contacts, the time of flight of the contact and the time of bounce of the closing contacts of the product 12;

4Aop is the maximum allowed switching time.

Short-term contact loss is also monitored when product 12 is in a fixed position with closed opening contacts or in a fixed position with closed closing contacts, as well as non-closing of closing contacts when the product 12 is switched.

During the process of connecting the product 12, the device is reset as follows.

The low level from the common bus of the device through the disconnecting contact of the connected product 12 enters the input of the pulse shaper 13 and the input of the NAND element 19. At the moment of connecting the monitored product 12, the trigger 17 is reset to a high level at the forward output, since prior to installation of the product 12, a high level from the power supply bus passes through the resistor 7 to the input of the pulse shaper 13. When connecting the product 12 to the input of the shaper J 3 pulses bounce, and at its output a negative and The pulse that sets the trigger 17 to its original state. At the outputs of the formers 15 and 16 pulses, the low level is set at the output of the element OR 18 low level, respectively

15

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the input element AND 21 from the output of the inverter 20 enters a high level; the input level of the element 24 and 24 is set to a low level set from the output of the element OR 18. If during connection of the product 12 the trigger 17 switches to the initial state c. unit at the direct output, then at the output of the driver 15 pulses 10 a positive pulse is formed, which through the element IL1 18 goes to counter 5. Therefore, to reset the counter 5, the flip-flops 23, 29 and 30 are fed to the initial 10 negative impulse setting to zero.

After connecting the product 12 at the input of the pulse driver 14 and the input of the NANDI element 19, a high voltage level is supplied from the power bus through the resistor 8. At the output of the NANDI element 19 a high level is set, respectively, at the output of the II element 21 - a high level , the output of the former 22 pulses is also high.

In the initial state, the counter 5, at the output has a low level, the switch 28, made, for example, on a counter connected to the outputs of the decoder, the outputs and the input connected to the output of the element And 27 has low levels, the input connected to the output of the trigger 23 is a high level, which ensures that the counter of the switch 28 is set to zero. The switch 28 and the counter 5 are triggered by positive pulses.

20

25

thirty

35

40

five

0

five

When the opening contacts of the product 12 are opened, they bounce, which causes a series of pulses to be entered to the input element AND-NOT 19 of the block 2 and an interval of control connected to the resistor 7. This series of pulses passes through the element AND-NOT 19 to the input of element 21, since from the resistor 8 to the other input of the element NAND 19, a high level is set. The element 21 of a series of pulses passes to its output, which is ensured by a high level from the output of the inverter 20. The first pulse of the series starts the driver of 22 pulses in block 3 of the chatter blocking of the break contacts, which sets the negative

a pulse to the input of the trigger 23, setting it to a state with a high level at the forward output (FIG. 2), while in the control unit 4, the passage of pulses from the generator 26 of pulses through the element 27 to the input of the switch 28, made, for example, is allowed on the counter and the decoder in three ways. The frequency of the pulses of the generator 26 can be adjusted from the input 11 of the device and is chosen from those considerations so that the signal at the output of the switch 28 and the output 36 of the unit 4 is not earlier than after time. The digitizer’s resolution and the connection of the decoder (in the switch 28) to it are also chosen for the reasons of setting the reference value t, counted from the moment of closing the closure contacts of the product 12. After

flight

product contact

12, after time t, + t, its closing contacts are closed and their bounce will begin, which will cause a series of pulses to be set through a resistor 8 to the input of the driver 14 of the pulses of the blocking device 1 from bounce of closing contacts (.З). The pulse shaper 14 of the first pulse of the input series will form a negative pulse, which switches the trigger 17 to a high state at the inverse output. At the moment of changing the level at the inverse output of the trigger 17 from low to high, the pulse shaper 16 is triggered, which sends an positive pulse of duration t y to the input of the inverter 20 and AND 24 through the OR 18 element.

y / yin

t ,.

one

t, j + tg

where t min is the minimum possible time for contact opening and contact bounce, respectively. The value of tg can be adjusted by the control signal from the input 9 of the device, which varies the pulse duration of the drivers 15 and 16.

At the output of the inverter 20, a low level is formed, which prevents the bounce pulses of the closing contacts of the product 12 from

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stepping from the output element AND NOT 19, through the element 21, the driver 22 to install the trigger 23.

Since the output of block 1 (figure 2).

5, the falling edge of the positive pulse is formed after time tj, and from output 36 of control unit 4, the pulse arrives through time t, two impulses coincide on AND 24, from which output a positive impulse through element OR-NE 25 sets the trigger 23 to zero position at the direct input.

15 As a result of this, the switch 28 in the control unit 4 is reset to a high level from the inverse output of the trigger 23 to its initial state and the passage

20 pulses from the generator 26 pulses through the element H 27 on the switch 28.

Positive momentum 5

0

five

0

five

0

Stew tj. from the output of the element OR 18 enters the input of the counter 5, adding to its contents a unit, after each switching of the product 12 from one fixed position to another. As a result of the number of switches, for example, six switches, when the product 12 is suitable for each switch, specified by selecting a conversion factor, counter 5 switches and sets a high level to the input of the inverter 35, a low level from the output of which resets trigger 30 unit at the exit. Since the trigger 29 of the block 6 is in the case of the suitability of the product 12 in a state with a high level at the inverse output, a high level is generated at the output of the element 31, including the indicator 33, indicating the result is valid.

In the case of the uselessness of the product 12, when the switching time thereof exceeds a value, as a result

increase of any of times t

2

The tg bounce of the contact closure continues even after the termination of a positive pulse at the output of block 1 (of duration tj). At the output 5 of the inverter 20 (Fig. 2), a high level is established, which causes the bounce pulses from the resistor 8 to pass through the elements 19, 21 and 22 to the input of the trigger 23 and re-set it to the high-level position on the direct output. The pulses from generator 26 pass through AND 27 to switch 28 and fill its counter, which is included in its composition, and positive pulses are sequentially generated at the outputs 36-38 of control unit 4. The pulse from output 36 through element I 24 does not pass, since this element is locked low from the output of block 1. The pulse from output 37 through inverter 34 flips trigger 29 to a low level on the inverse output, while turning off indicator 33 through element 31 and the high level indicator 32 turns on, indicating the result is not valid. The impulse from the output 38 is used to set the trigger 23 through the OR-NOT 25 element to the initial state, which also leads to the use of 1206730

ten

ten

installation of the switch 28 and the prohibition of the passage of pulses from the generator 26 of pulses through the element 27.

In case of short-term contact loss in the fixed state of the product 12 or the non-contact of the closing contacts immediately after the switch, the device operates similarly to the dynamic test mode (Figures 2 and 3) with pulses output at the outputs 36-38 of the control unit 4.

Thus, by introducing resistors, block 2 of the monitoring interval and performing blocks 1-6 in the proposed device, the total time for switching the product in the switching mode of the product is additionally controlled, and 20 is also continuously monitored for contact at any of the fixed positions products, which significantly increases the reliability of the control result.

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Editor A. Shandor

Compiled by V. Dvorkin

Tehred M. Parotsay Proofreader O. Lugov

Order 8706/47 CirculationSignature

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch ShSh Patent, Uzhgorod, st. Project, 4

Claims (6)

1. DEVICE FOR CONTROL OF COMMUTATION PRODUCTS, comprising a block for blocking the bounce of make contacts, connected by the first and second inputs, respectively, with terminals for connecting the opening and closing contacts of the product to be monitored, and the output with the counter input of the counter connected by the transfer output to the first input of the display unit connected to the second the input with the first output of the control unit, the blocking blocking rattle of the NC contacts, characterized in that, in order to increase the reliability of control, in the device the first and second resistors and a control interval allocation unit are introduced, the terminal for connecting the switching contact of the product being monitored is connected to the device’s common power bus, the first and second inputs of the contact blocking blocking block are connected respectively through the first and second resistors to the device’s power bus and directly to the first and the second inputs of the control interval allocation unit connected by the output to the first input of the blocking block of the bounce of the NC contacts connected by the second input ohm with the third input of the control interval allocation block and with the counter input * of the counter, the third input with the second output of the control unit, the fourth input with the first installation input of the counter and the third output of the control unit, the first and second outputs, respectively, with the first and second inputs of the block control connected by the third input to the first input of the device, the second input of which is connected to the third input of the blocking block of the bounce of closing contacts! 9 clocks, the third input - with the second installation input of the counter, with the third input and display and to a fifth input blocking unit debounce NC contacts. 2. The device according to claim 1, characterized in that the block blocking the bounce of make contacts contains the first and second forming. pulse drivers connected by inputs with the first and second inputs of the block, outputs respectively with the first and second installation inputs of the first trigger connected by direct and inverse outputs · respectively through the third and fourth pulse shapers with the corresponding inputs of the OR element connected by the output to the output of the block, connected to the third input with the control inputs of the third and fourth pulse shapers. 3. The device according to claim 1, characterized in that the unit is SU „1206730 of the control interval contains an AND-NOT element connected by the first μ second inputs with the same inputs of the block, an output with the first input of the first AND element connected by the second input through the first inverter with the third input of the block, the output - with the output of the block. 4. The device according to claim 1, characterized in that the blocking blocking rattles of the NC contacts contains a fifth pulse shaper connected by an input to the first input of the block connected by the second and third inputs respectively to the inputs of the second AND element connected by the output to the first input of the OR-HE element connected by the second input to the fourth input of the block, output - with the first installation input of the second trigger, connected by the second installation input with the fifth input of the block, information input - with the output of the fifth pulse generator ow, direct and inverse outputs, respectively - with the first and second outputs of the block. 5. The device according to claim 1, characterized in that the control unit comprises a pulse generator connected to the control input with the third input of the control unit, and output to the first input of the third element And connected by the second input to the first control unit input, output - s. information input of the switch connected by the installation input to the second input. control unit, the first, second and third outputs, respectively, with the second, first and third outputs of the block. 6. The device according to claim 1, wherein the display unit comprises a second and third inverters connected ^ inputs respectively to the second and first inputs of the block, outputs - with the corresponding first installation inputs of the third and fourth triggers connected by second installation inputs with the third input of the block, the output of the fourth trigger is connected to the first input of the fourth element And, connected by the second input to the inverse output of the third trigger, the output is to the input of the first indicator connected by the power output to the power bus device and with the power output of the second indicator connected by an input to the direct output of the third trigger.