SU1260917A1 - Programmed control device - Google Patents

Abstract

The invention relates to test equipment, in particular, to technical means of control, and can be used in technological plants for growing single crystals with a given law of temperature variation over time, in process lines for electroplating and other installations as software devices during technological processes. . The purpose of the invention is to reduce the time to migrate to another mode. For this, the software control device contains a DC source, adjustable resistors, a series-connected AC source, a capacitor, a limiting resistor, and a capillary mercury-electrolytic resistor, a series-connected capacitor, AC amplifier, voltage amplifier, DC amplifier current and adder, as well as elements NOT, comparators, And elements, power amplifiers, relays with corresponding opening and closing contacts, start button, switch Three reference voltage source. 1 il. i (Л С

Description

The invention relates to instrumentation, in particular, to technical means of control, and can be used in process plants for growing single crystals with a given law of temperature variation over time, in process lines for conducting electroplating and other installations as software devices when conducting technological processes.

The purpose of the invention is to reduce the time to migrate to another mode. The drawing shows the functional diagram of the device.

The software control device contains a source of direct current 1, adjustable resistors 2 and 3, an AC source in series 4, a first capacitor 5, a limiting resistor 6 and a capillary mercury electrolytic resistor 7, a second capacitor in series 8, an AC amplifier 9 current, rectifier 10, amplifier P of direct current and adder 12, as well as elements NOT 13-15, first and second comparators 16 and 17, elements 18 and 19, amplifiers 20-23 power, first relay 24 with break contacts 25 and 26 and zamy tang contacts 27 and 28, the second relay 29 with opening contacts 30-32. and closing contacts 33-35 are the third relay 36 with closing contacts 37 and 38, a start button 39 with closing contacts 40 and 41, a switch 42 with opening contacts 43 and 44 and closing contacts 45 and 46 and three sources 47-49 of the reference one tension

The device works as follows.

Based on the required law of change of the controlled parameter of the technological process (e.g. temperature), the switch 42 establishes the appropriate mode of linear variation of the output voltage of the device — twisting (PV) or Lowering (PN). At the same time through the contacts 43 or 45 to the comparator 16 receives a reference voltage, fixing the change in the output signal of the device (at the position of TTE and d, at the position of nH-ort, y, ir,). Adjustable resistors 2 and 3 set the successor

five

0

five

0

five

40

The change in output signal (resistor 2 - increase, resistor 3 - decrease) by setting the magnitude of the control current of the capillary mercury-electrolytic resistor 7.

The unit is triggered by the start button 39. At the same time, a control current begins to flow through the capillary mercury electrolytic resistor 7, changing the value of its resistance, depending on the initial state of the resistor. If the resistance is at a minimum level, the direction of the control current is automatically set, at which the resistance of the resistor increases. If in the initial state the resistance of the resistor is at the maximum level, then the control current reduces the resistance. The voltage drop across this resistance is converted into an output signal of the device by means of an alternating current source 4 of stable amplitude and frequency, capacitors 5 and 8, a limiting resistor 6, an amplifier 9 ac, a center voltage 10, and a DC amplifier 11. The output voltage of this amplifier goes to the output of the device directly through contacts 25 and 37 or through contacts 27 and 37, being previously subtracted from level and. via

 1 gpc

adder 12.

If the resistor 7 is turned on when the device is turned on, the voltage at the output of the DC amplifier 11 is equal to This voltage is compared in the comparator 17 with the voltage of the reference signal previously specified at its second input, the value of which is greater than UQ and less

45 and

he max

for example equal

 Jjijjau5.2 J Tilr

The output of the comparator 17 is formed logical About

which through input 44 is fed to one input of element 19, at the other input of which logical 1 is formed by amplifier 22. Therefore, output of element 19 is logical O, while the relay 24 winding is de-energized, and the output signal of direct current amplifier through contact 25 goes to pin 37 and comparator input ,. sixteen.

The other input of this comparator receives a voltage of 1 „„ „through the contact 43. The output of the comparator 16 is logical 1, which is fed to the input of element I 18, at the second input of which is logical O from the output of element NOT 15. Therefore, the relay winding 36 is de-energized, contacts 37 and 38 are open, the output voltage of the device is absent, and the control current does not flow through the resistor 7.

When the start button 39 is pressed, the voltage U, comes through the contact 40 to the input of the element NOT 14. The winding of the relay 29 is de-energized and through its contacts 30 and 31 the adjustable resistor 2 is supplied with the voltage of the polarity that provides the potential for reducing the voltage at the output of the device. The switch 42 is set to positive resistance of the resistor 7 (in this case, the positive field p 2 PN. At the same time through the contact 45 on the ground). At the same time, the input of the comparator 16 is fed through the contact. For example, a logical O arrives at the input of the amplifier 22, which then enters AND 19, preventing the accidental switching on of the relay 24, and also NOT 15 through the input of the AND element 18. At the output of this element a logical 1, which, through power amplifier 20, turns on a relay. 36. Therefore, contacts 37 and 38 are closed, the resistance of the resistor 7 is pressed Uar, the output signal of the comparator 17 is fed to the input; element AND 19 through contacts 46 and element 25 NOT 13. Due to this activation, relay 24 does not work if in its initial state the resistance of the resistor 7 is maximum, and it works if it is minimal. After pressing the start button 39, the relay 29 is turned on and remains in this state for the entire duration of the voltage reduction. A voltage of the appropriate polarity (depending on the initial resistance of resistor 7) is applied to the adjustable resistor 3. When the output voltage

increases and the output of the device receives an increasing voltage. When the output signal reaches the level and the comparator 16 35 forms a logical O at its output. As a result, the relay 36 de-energizes, and its contacts 37 and 38 disconnect the device output and the resistor

Uar, the output signal of the korathor 17 is fed to the input; Element I 19 through contacts 46 and element 25 NOT 13. Thanks to this switch on, 24 does not work if in the initial state the resistance of the resistor 7 is maximum, and does it work minimally. After pressing the start button 39, the relay 29 turns on and remains in this state for the entire duration of the descent. A voltage of the corresponding polarity (depending on the initial resistance of the resistor 7) is applied to the adjustable resistor 3. When the output voltage

the device becomes equal at the output of the comparator 16 forms

7, the resistance of which ceases to be “O logical O, as a result of which

relay 36 turns off and contacts 37 and 38 open, i.e. the control current through the resistor 7 is terminated and the voltage from the output of the device is turned off.

change. If the output of the device requires a voltage of the level reached, then it should be. provide for self-blocking of contact 37. (not shown).

If the resistor 7 is maximal at the moment when the device is turned on, the voltage at the output of the DC amplifier 11 is equal to

and"

At the output of the comparator 17 - .50, regardless of the initial state of logical 1, which through the contact 44 goes to one input of the element And 19, on the other input of which logical 1 is formed by the amplifier 22. Therefore, at the output of the element 55, And 19 - logical 1, and the relay 24 is triggered. Pin 27 connects the output of the adder 12 to pin 37 and

609174

the input of the comparator 16. At the same time, the contact 28 connects the adjustable resistor 2 to the output of a different polarity (in this case, negative) of the DC source 1. Similarly, when the start button 39 is pressed, the relay 29 is turned off and relay 40 is switched off via contact 40. Relay 36 is turned on, contacts 37 and 38 are closed, the resistance of resistor 7 begins to decrease, and at the output of adder 12, the voltage starts to increase, it is equal, - Ug ,,,. Consequently, the device also receives an increasing voltage.

In order to obtain a mode for reducing the voltage at the output of the device, the switch 42 is set at position 10

five

 Mon At the same time through contact 45 to the input of the comparator 16 enters for example

Mon At the same time through contact 45 to the input of the comparator 16 enters for example

Uar, the output signal of the comparator 17 is fed to the input; element AND 19 through contacts 46 and element NOT 13. Due to this activation, relay 24 does not work if the resistance of the resistor 7 is maximum in the initial state and triggers if it is minimal. After pressing the start button 39, the relay 29 is turned on and remains in this state for the entire duration of the voltage reduction. A voltage of the appropriate polarity (depending on the initial resistance of resistor 7) is applied to the adjustable resistor 3. When the output voltage

the device becomes equal at the output of the comparator 16 is formed

logical Oh, as a result

relay 36 turns off and contacts 37 and 38 open, i.e. the control current through the resistor 7 is terminated and the voltage from the output of the device is turned off.

Thus, the proposed device provides a change in the output voltage both in the direction of increasing it and in the direction of decreasing the capillary mercury electrolytic resistor, which eliminates the process equipment downtime required for reconfiguring the device to another mode, and increases the productivity of the growing process. crystals on average by 6-8%. The proposed device can take 512

But in those technological processes where, for one reason or another, equipment downtime is unacceptable, or where a continuous technological cycle is required.

Claims (1)

Invention Formula Software control device containing a DC source, two adjustable resistors, the first element AND, four power amplifiers, three relays connected by inputs to the outputs of the corresponding power amplifiers, an AC source connected in series, the first capacitor, a limiting resistor and a capillary a mercury electrolytic resistor connected by a second output to a common bus, a second capacitor connected by a first output to a first output of a capillary mercury electrolytic resistor, and The second output is to the input of an AC amplifier connected in series with a rectifier, a DC amplifier and the first comparator, two sources of reference voltage, a second comparator connected by a first input through the disconnecting contact of the first relay to the output of the DC amplifier, a start button, the device output being connected via the first closing contact of the third relay to the first input of the second comparator, from. Likewise, in order to reduce the time for reconfiguring to another mode, a second element AND is inserted into the device, connected by the output to the input of the first power amplifier, the first element is NOT, connected by the input to the output of the first comparator, the second element is NOT, connected by the output to the input of the second power amplifier, the third element is NOT connected by the output to the primary input of the first element I, which is connected by the output to the input of the third power amplifier, and the second input to the output of the second comparator ,, sum- 7 " the torus connected by the first input to the output of the DC amplifier, the second input to the output of the first voltage source, and the output via the closing contact of the first relay to the first input of the second comparator, the second input of which is connected through the first closing contact of the start button with the input the second element is NOT, the switch, the first opening contact of which is connected between the first reference voltage source and the second input of the second comparator, the first closing contact is connected between the second reference voltage source and the second input of the second comparator, the second disconnecting contact is connected between the output of the first comparator and the first input of the second element AND, and the second closing contact between the output of the first element NOT and the first input of the second element I. connected to the second input to the input of the third element NOT and to the output a fourth power amplifier connected by the input via the second make contact of the trigger button to the common bus; the first output of the capillary mercury electrolytic resistor through the second contact ground is t its relay is connected to the first pins of adjustable resistors, each of which has second and third pins that are connected and connected through the first respectively opening and closing contacts of the second relay, through the second respectively opening and closing contacts of the first relay and through the second opening and closing contacts of the second relays respectively to the positive and negative terminals of the DC source, and through the third disconnecting and closing contacts of the second relay, respectively, to the negative and put to a terminal, a source of a direct current source, as well as a third source of direct current, connected by an output to the second input of the first comparator. Editor I. Casard Compiled by V. Pr. Mitzin Tehred A. Kravchuk Order 5230/48 Circulation 836 Subscription VNRSHPI State Committee of the USSR for inventions for discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Proofreader O.Lugov