SU1247842A1 - System for controlling and checking - Google Patents

Abstract

The invention relates to computing; technology and automation, can - be used in digital automated systems and complexes as a subsystem of control: and control, for example, temperature, speed, pressure, etc. The aim of the invention is to increase the reliability of the control. The invention contains the following main components: a control panel, two dividers of purity, controlled frequency and reference frequency generators, a pulse distributor, a comparison unit, three switches, and a display unit. 6 Il. (C

Description

"one

The invention relates to computer technology and automation and can be used in digital automated systems and complexes as a subsystem for controlling and controlling, for example, temperature, speed, pressure, etc.

The purpose of the invention is to increase the reliability of the control.

On: Fig. I is a functional diagram of a system for monitoring and control; Fig. 2 is a functional diagram of the control panel; FIG. 3 is a functional circuit of the display unit; figure 4 is a functional diagram of the frequency divider; on fig.Z - function O1-cha pulse distributor circuit; figb is the functional circuit of the comparison block.

The system for monitoring and control C of Fig. 1} contains a remote control 1, a display unit 2, first and second dividers 3 and 4 frequencies, a distributor 5 pulses, a control counter b, generators 7 and 8 controlled and ono.pHofi frequencies, registers 9 and 10 controls and signs, comparison block II, comparison circuit 12, first to third switches 13-15, first and second triggers 16 and. 17 modes, the first and second triggers 18 and 19 of the control, trigger 20 trigger, the first I second trigger 21 and 22 characters, the first - the sixth elements And 23-28, the first and second elements, BAN 29 and 30, nepBbui - the sixth 31- 36 elements - SHI5first and second one vibrators 37 and 38, nepBbBi and the second, outputs 39 and 40 of the system, first - three-. This information outputs 41 -43 of the control panel | 1 control, outputs 44 and 45 of the remaining and start control of the control panel 1, the first and second outputs 46 and 47 of the distributor 5 pulses, the output 48 of the register 9 krptrol, the first and second outputs 49 and 50 of the register 10 characters, the first - the third outputs 51-53 of the comparator unit 11, the outputs 54-56 of the first and second elements BANKS 29 and 30 and the Sixth element AND 28 correspond o, the outputs 57 and 58, and 35 and the sixth 36 elements 1-SHI respectively .

The control panel 1 (Fig. 2) contains the generator 59 of the unit,, first 60, the second 61 n the third 62 switch groups, the first 63 and the second 54 buttons.

five

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five

The display unit 2 (FIG. 3) contains a group of display elements 65, the first 66 is the seventh 72 display elements, the first 73 is the fifth fifth 77 triggers.

Divider 3 (4) frequency contains (figure 4) the counter 78, the circuit 79 comparison, one-shot 80.

The pulse distributor 5 (Fig. 5) contains a counter 81 and a decoder 82, Comparison Unit 1 (ib) contains a comparison circuit 83, first 84 and second 85 switches and And 86 element.

The control panel 1 is designed to set the code of the monitored parameter (output 41), the number of pulses code that determines the operation of the 4-pulse divider (output 43), the code of the interval duration (output 42J, as well as the start signal formation Start-up output 45) and Stop ( exit 44). These codes and signals are formed using switches 60 - 61 and buttons 64 and. 63 respectively. .

Block 2 is used to write and control the monitored parameter (indicators 65}, the sign of the parameter (indicator 67 - minus and indicator 66 - plus). Triggers 73-77 and indicators 68-72 serve for detecting failures, indicating failures of actuators , the executive body providing the increase in control

This module, Comparison Unit 11 and the system as a whole, respectively. The first frequency divider 3 forms at its output a sequence of pulses, the interval between which is determined by a code, is generated at the output 42 of the control panel 1 and received at its information input. The pulses arriving at the synchronization input of the divider 3 are recorded in the counter 78. When their number coincides with the number that is set at the output 42 of the console 1, a single signal appears at the output of the comparison circuit 79. On its leading edge, the single-vibrator 80 forms an Idulse, which arrives at the output of divider 3 and on the reset input of counter 78. The latter returns to its original state, 5, after which the cycle of operation of divider 3 is repeated.

The second frequency divider 4 is designed; to form, pulse

0

five

0

five

0

20

25

at the output after a specified number of pulses is received at its input. The pulses arriving at the input of the divider 4 are recorded in the counter 78. The output signals of the counter 78 are fed to the comparison circuit 79, to another input of which a code of a predetermined number of pulses is output from the output 43 of the remote control 1 of the control. When these codes coincide, the output of the circuit 79 is comparable to where the NIN appears a single signal, on the leading front of which the one-oscillator 60 generates a pulse that arrives at the output of divider 4 and at the reset input of counter 78, transferring it to its initial state .

The pulse distributor 5 is designed to form control pulses defining the beginning and end of the monitoring interval. The pulses arriving at the input of the distributor 5 pulses are fed to the counting input of the counter 81 and the control input of the decoder 82. The first pulse entering the input of the distributor 5 pulses passes to the first output of the decoder 82 and then to the output 46 of the distributor 5 pulses. On the falling edge of this pulse, the counter 81 is recorded 1. The second input pulse passes to the second output of the decoder 82 and further to the output 47 of the distributor 5 pulses. The third and fourth input pulses transfer the counter 81 to the third, and then to the zero state. They correspond to the pulses at the third and fourth-end outputs of the decoder 82 (these outputs are not shown in Fig. 5 and are not used in the system. By this, it is achieved that the time interval between the output pulse 47 and the output 46 pulse of the distributor 5 exceeds three times. the time interval between the pulse at step 46 and the pulse at exit 47 of the distributor 5,.

Control counter 6 is used to count the number of pulses corresponding to the monitored parameter.

The generator 7 of the controlled frequency when turned on generates a sequence of pulses, the frequency of which depends on the value of the monitored parameter. For example, in temperature control, a piezo-quartz thermochamber 30 can be used as a generator 7.

35

40

45

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55

life is not blushing

one world

boo a couple post

for bullet bullets

for -control of 41 s, 83 sources are used in pairs.

Where

A total converter having a frequency of 5.6 MHz and an eL 200 conversion slope.

The frequency generated by generator 7 is determined by the value of the parameter being monitored and depends linearly on its value. For example, for the specified device

20

25

 O where 5

thirty

five

0

five

I 0

five

+ of t,

frequency at {o is the slope of the transform; - the value of the monitored parameter (temperature),

The reference frequency generator 8 serves to form a sequence of stable frequency pulses, independent of the change in the monitored parameter. Its frequency is used to form 3 pulses with a divider, the interval between which is determined by the output from the output 42 of console 1 and determined by the required accuracy of the control.

The generators 7 and 8 are triggered, with a single signal at their input, generated by the trigger 20.

Control register 9 serves to store the value of the parameter being monitored. The write to register 9 is performed at the falling edge of the pulse arriving at the C input.

The character register 10 is intended to store the character of the monitored parameter. 1 at the output 49 of the register 10 corresponds to the plus sign, and at the output 50 - to the minus sign. The writing of the code, the sign in the register 10 is carried out on the falling edge of the pulse arriving at the C input.

Comparison unit 11 is designed to compare the true value of the r-controlled parameter (B) with the required (A) specified at the output 41 of the control panel 1 and generate signals at the output 51, at the output 52, and A B at the output 53. For comparison the true and required values of the parameter, taking into account the signs, sign bits are supplied to the inputs of the comparator block 11 as the highest bits. An example of the implementation of the comparison unit 11 is shown in FIG. The inputs A and B of the comparison circuit 83 receive the required and true value of the monitored parameter along with the sign bits, and the inputs of the E86 element are the bits of the inputs corresponding to the negative signs of the required and true parameter values, respectively. As a result, one of If the value of the element And 86 is present, a zero signal is present and, via Tagore 84 and 85, the output signals of the comparison circuit 83 without change are transmitted to the outputs 51 and 53 of the comparison unit 1. If both signs are negative and A / B, then a single signal is present at the output of element And 86 and the switch 84 and 85 invert the corresponding signals emitted by the comparison circuit 83,

The comparison circuit 12 serves to compare the adjacent values of the monitored parameter and the formation. signals in F (if the current value of the parameter is greater than its value in pre-D1 .. control cycle) and B I- (if-, whether TeKyuiee parameter value is less than its value in the previous control cycle j,

The first switch 13 is designed to ensure the correct functioning of the comparison unit 11. He issued- e j. zeroing only in those cases when one and only one single signal is received on block I compared to one 51, and gives one; The primary sipgal in all other cases, rea;

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X,

- Signals na inputs. 1 - 3, Second 14 and third 15 coG C-gutator form the signals corresponding to the removal of the signal about and. an increase in the value of the monitored parameter according to the data of two adjacent control cycles taking into account the signs of the parameter.

The first trigger of the pre-launch of the divider 4, Set to 1, the trigger 16 from the AND 24 element, through which the pulses from the output of the generator 7 pass through the input of the divider 4.

The second trigger 17 jTe aci; i -i a iigeji- is assigned to start and stop the counter 6 of the control. Having established 1 trigger 17, the element 11 23 opens and the pulses from the generator 7 output pass the input of counter b.

When the trigger 17 returns to O, the element H 23 closes at zero, and a pulse arrives at the input of counter 6,

The first 8 and second 19 triggers of the control actions serve to memorize the output of the 1st signals of the comparator unit 11 and generate control signals at the system outputs 39 and 40, respectively. The trigger state of the trigger 18 corresponds to the preceding set value of the monitored parameter trigger 18 controls the switching of the actuator to reduce the size of the controlled parameter, such as turning on the refrigeration unit during control and temperature control.

One-to-one. The state of the trigger 19 corresponds to the reduction of the controlled parameter but compared to the given one. The output signal of the trigger I9 controls the switching on of the actuator, which ensures the increase of the monitored parameter, for example the activation of the heater.

The recording of the information in the triggers 18 and 19 is carried out on the falling edge of the sync pulse arriving at the C-inputs of these triggers.

Start trigger 20 serves to start and stop the system operation. On the Start signal from output 45 of console 1, the op is set to 1, and by the Stop signal from output 44 of console 1 to O, Trigger 20 is set to O when a failure occurs in the system , about which the single signal appears at the output 58 of the liini 36 element, the reset signal to the R input of the trigger 20 forms the element OR 32.

The first trigger 21 characters serves to memorize the positive sign of the monitored parameter. With a positive sign of the parameter through the element And 26. the impulse arrives at the S-input of the trigger 21, which sets it to 1. Having established at 1, the flip-flop 21 prohibits the passage of a pulse by an S-input of the flip-flop 22, closing the element And 27,

The second trigger 22 characters serves to memorize the negative sign of the monitored parameter. With a negative sign of the narsh-penalty through the element And 27 on the S-input trigger 22

with in 1. Switching, the trigger 22 closes the element And 26 and thereby prohibits the triggering of the trigger 21.

Element And 25 and one-shot 37 form a reset signal for triggers 17, 21 and 22 and information recording signal in registers 9 and 10 and triggers 18 and 19 if impulses appear simultaneously at output 47 of distributor 5 and output of divider 4, which indicates zero value of the controlled parameter. In addition, this signal passes to the elements 28-30, allowing the formation of failure signals when a failure of one of the executive bodies or the comparison unit 11 is detected.

Elements And 26 and 27 form the signals for the installation of flip-flops 21- and 22, respectively, in a single state if the sign of the monitored parameter is positive or negative. Elements 28 and the element BAN 29 form the failure signals of the executive agencies that increase and decrease the value of the monitored parameter correspondingly. By comparing the values of the control actions, issued at the end of the previous control cycle and the sign of the increment of the monitored parameter, obtained during the time interval between the previous and the current control cycles.

The element BAN 30 forms the failure signal of the comparator block 11.

Element And 31 generates a reset signal of the trigger 21 and 22 with the appearance of a pulse at the output 46 of the distributor 5 pulses, or when the coincidence of the pulses at the outputs of the divider 4 frequency and 47 of the distributor 5 pulses.

The OR element 33 forms two pulses at the C input of the trigger 17, determining the beginning and end of a single state of the trigger 17.

Element ILR1 34 generates a pulse of recording information in registers 9 and 10 and triggers 18 and 19 if pulses from the outputs of single-vibrators 37 or 38 are received at its input.

The element OR 35 generates a signal of failure of the executive bodies of the system, if a failure of one of the two executive bodies is recorded.

controlled parameter.

The OR 36 element forms a signal of a general system failure when the failure of at least one of the monitored elements of the system occurs.

The one-shot 38 generates a pulse of writing information into registers 9 and 10 and triggers 18 and 19 when trigger 17 returns to the zero state and a high potential appears at its inverse output.

The system for monitoring and control works as follows.

Before operation, all the memory elements of the system are reset to the initial state from the control panel 1 (the reset circuit of the initial state is not shown conventionally in Fig. 1). In addition, from the control panel I, a digital code is set that corresponds to the desired value of the monitored parameter (output 41), digital code N, defining a pulse following period at the output of frequency divider 3 (output 42), digital code NO, corresponding to the number of pulses, which generator 7 should produce at a frequency of

about

corresponding to the zero value of the parameter for the time interval defined by

code N (exit 43).

The code N must be chosen such that the period t of the following pulses at the output of divider 3 is numerically a multiple of i / cL .. Then the difference between the number of pulses N formed by generator 7 during this time and N. , will be a multiple of the true value of the controlled parameter t.

The operation of the system starts at the Start signal generated by the operator from the control panel 1. This signal arrives at the S-input of the trigger 20, which is set to 1 and starts the generators 7 and 8. At the counting input of the counter 78 (FIG. 4), pulses from the output

generator 8. On admission

A pulse appears at the input of the divider 3 of the number of pulses equal to N, which passes to the output 46 of the distributor 5 pulses, and divisor 3 starts re-counting the interval defined by the code M from the output 42 of the remote control 1 of the control. This impulse confirms the outcome

The state of triggers 2 and 22, counter b, and sets to

R

trigger 16. Trigger 16 opens element II 24 and the pulses generated by 1 eiratorom 7 begin to start at the input of divider 4. In the future, the operation of the system depends on the sign of the monitored parameter. If the parameter is positive, the generator frequency 7 f f and, therefore, the number of NO dashuls will be generated by the generator 7 in time, i.e. 1-1 impulse at the output delntel 4 in the Vits earlier than the pulse, at the output of the divider 3. The impulse from the output of the divider 4 will reset the trigger 16, which closes the element And 24. At the same time, this pulse passes to the C-input of the trigger 17 and S-input of the trigger 21 As a result, both triggers will go into the typical state. Trigger 21 will detect the plus sign of the parameter being monitored, and trigger 17 will open element 23 and, as a result, pulses from the output of generator 7 will begin to flow to the input of counter 6. Overfed) H1 time interval multiple of T, divider 3 generates a pulse of the cohors passes to the output 47 pulse distributor 5. This pulse through the OR element 33 will also pass to the C input of trigger 17 and returns it to the zero state orge. The trigger 17 closes the element And 23, resulting in the counter b recorded a number multiple of the value of the monitored parameter.

The high potential from the inverse output of the trigger 17 is fed to the input of the single 38, which generates a pulse. This impulse passes through the OR 34 e-mail to the C inputs of registers 9 and 10 and flip-flops 18 and 19. As a result, the value of the parameter being monitored is written to register 9, the sign code of the parameter is written to register 10, and 18 to 19 control action, which is formed by the unit 11 of the comparison. If the parameter value is less than the required, then a trigger 19 will be installed and a single signal will be output at the system output 40. Otherwise, the trigger 18 will become one and a single signal will appear at the system output 39.

From the output of register 9, the code on the meter goes to the display, and from the output. to

24784210

Yes register 10 in block 2 indi-ation enters the k-th sign of the parameter.

If the parameter is negative, the generator frequency is 7 f f. As a result, the pulse at the output 47 of the distributor 5 is Vits before the pulse at the output of the divider 4. It pr01 1degrees to the C input of the trigger 17 and S input of the trigger 22.

0

15

20

25

thirty

The trigger 22 will fix the minus sign of the parameter, and the trigger 17 will open the element And 23, and the meter b starts counting the pulses of the generator 7. When the divisor 4 receives the number of pulses equal to N, it gives an impulse that passes to the C input of the trigger 17 and returns it in O. Trigger 17 closes the element I.23 and the flow of 1 pulses to the counter 6 stops. As a result, the counter 6 will have a number equal to the difference N, T.e. multiple value of the monitored parameter. In the future, the work of the elements of the system is similar to that described.

At zero value napaivieTpoB for the time to the input delntel 4 receives NQ pulses. As a result, the pulses at the output of the divider 4 and at the output 47 of the distributor 5 in the TC simultaneously. They arrive at the inputs of the AND 25 element, which gives a pulse to the input of the one-vibrator 37. The single-oscillator 37 generates a pulse to the R-inputs of the trigger 17, 21 and 22, as a result of which they remain in the zero state. At the same time, this impulse 34 passes to the C-inputs of registers 9 and 10 and triggers 18 and 19. As a result, registers 9 and 10 will write the code of the zero value of the meter, and to triggers 18 and 19 the necessary control signals formed by block 11 compare.

The next pulse generated by the generator 8 transfers the counter 78 (Fig 4) to the next state, etc. The capacity of the counter 78 is determined by the need for an interval between two successive monitoring and control cycles. If, for example, the counter 78 is two-digit, then this provides an interval between n, control, and equals 3. The fourth pulse formed by generator 8 is fed to the input of counter 78. On the falling edge of this pulse is the counter

35

40

50

55

78 returns to its original state, after which the distributor 5

Pulses ready for the next control cycle.

The next pulse, formed by the divider 3, passes to the output 46 of the distributor 5 and the system starts the next cycle of parameter control. At the end of this cycle, which is performed similarly as described in counter 6, the next value of the parameter being monitored is recorded, the parameter sign code in the triggers 21 and 22, and the values of the control signals on the outputs of the comparison block 11. The value of the parameter from the output of counter 6 is fed to the B input of the comparison circuit 12, and to the other its input the previous value of the parameter stored with register 9. As a result, a single signal appears at one of the outputs of the comparison circuit 12, which corresponds to a positive or negative increment of the monitored parameter. This output signal is fed to the inputs of switches 14 and 15, the other inputs of which receive signals from the output of the trigger 21 and the output 49 of the register 10 and the decisive signs of the neighboring, parameter values. If during the elapsed time interval the parameter value decreases, then a single signal appears at the output of the switch 14, and if it increases, then at the output

switch 15. These signals are fed to the inputs of elements 28 and 29

respectively, the other inputs of which receive signals from the outputs of the switches 13, the element OR 34, and the triggers 19 and 18, respectively. Thanks to this, at output 54 of the element 28 and Vits, there is a single signal if the executive body fails to ensure the temperature increase, and output 55 of the element BAN 29, if the executive body fails to provide a decrease in temperature. .

If O, two or three single output signals appear simultaneously at the outputs of the comparison block 11, the failure of this block is detected by the switch 13, the signal from the output of which goes to the input of the element AND 30. When a pulse arrives from the output of the element OR 34, the BAN 30 output pulse, signaling the failure of the unit 11 of the comparison.

11 failure pulses are received in the display unit 2, memorized by the corresponding triggers, which include a failure indication, thereby informing the operator. In addition, the failure pulse passes through the OR elements 36 and 32 and flushes the trigger 20 into O

start-up, thereby stopping the further operation of the faulty system, from the outputs of the flip-flops 19 and 18, respectively. If the inputs of the element And 28 simultaneously receive a signal from

switch output I 14 (indicating a decrease in the value of the parameter) and a signal from the output of trigger 19 (indicating that at the end of the previous monitoring cycle

if the executive body is turned on, ensuring an increase in the value of the parameter), the element AND 28, when a pulse arrives from the output of the element OR 34, generates a signal of failure of the corresponding executive body. Similarly, the element BANGE 29 generates a signal of failure of the executive body, providing a parameter reduction, if an increase in the parameter value is recorded when the executive body is turned on.

Claims (1)

Invention Formula The system for monitoring and control, containing a control panel, a display unit, the first frequency divider, a pulse distributor, controlled and reference frequency generators, the first element I, and the outputs of the generators of the controlled and reference frequencies are connected respectively to the first input of the first element I and the synchronization input of the first frequency divider, characterized in that, in order to increase the reliability of the control, a comparison unit is inserted control counter, three switches, two triggers control, two mode triggers, two mark triggers, comparison circuit, control register, mark register, two one-shot, second frequency divider, two BAN elements, trigger trigger, OR elements, five elements AND, the first, second and third information outputs control panel connected to 13 the first information input of the comparison unit and the information inputs of the first and second frequency dividers, respectively, the output of the first frequency divider is connected to the input of the pulse distributor, the first output of which is connected to the S input of the first mode trigger, with the installation; 124 with the first input of the control counter and the first input of the first OR element, the output of which is connected to the R-inputs of the first and second sign triggers, the inverse outputs of which are connected to the second inputs of the fourth and fifth elements And, respectively, the outputs of which are connected to the S-inputs of the first and second triggers sign, respectively, and the first inputs, respectively, with the first and second inputs of the third element 1-1LI and the third element And, the outputs of which are connected to the C-input of the second trigger mode a and the control input of the first one-shot coo correspondingly, the output of which is connected to the R input of the second mode trigger, with the second input of the first OR element and the first input of the fourth OR element, the second input of which is connected to the output of the second one-oscillator, the control input of which is connected to the inverse output and D-input of the second trigger the mode, the direct npsod of which is connected to the second input of the first element I, the output of which is connected to the counting input of the control counter, the information output of which is connected to the information input of the control register, the first information The input of the comparison circuit and the bits of the parameter values of the second information input of the comparison block, first, second and three. These two outputs are connected to the first, second, and third inputs of the first switch, the output of which is connected to the first input of the sixth And element and the inverse inputs of the first and second BANNER elements, the outputs of which are connected to the second and third inputs of the unit failure and scramblers, respectively, common failure input. the torx is connected to the output of the sixth, OR element and the second input of the second CM element, the first input of which is connected to the control console stop output, the start output of which is connected to the S trigger input -; ; -; , ten 15 2478421 The R input of which is connected to the output of the second OR element, and the direct output to the control inputs of the reference and controlled frequency generators, the output of which is connected to the first input of the second element I, the second input of which is connected to the right the output of the first mode trigger, and the output to the synchronization input of the second frequency divider, the output of which is connected to the first input of the fourth And element and the R input of the first mode trigger, the second output of the pulse distributor connected to the first input of the fifth element And, etc. my exits first O and second sign triggers are connected respectively to the first and second information inputs of the sign register and the high and low sign bits of the second information input of the comparison unit, the first and the third, whose inputs are connected to the D and N inputs of the nerve and second control triggers, the forward outputs of which are connected respectively with the first and second output of the system and the second inputs of the second and first elements of the BANGE, the third inputs of which are connected respectively to the outputs of the third and second switches, second s inputs are connected together and to a first output circuit srav20 25 thirty five 0 five 0 five The second output of which is connected to the third inputs of the second and third switches, and the second information input to the information input of the values of the parameters of the display unit and the information output of the control register, the C input of which is connected to the C inputs of the first and second control and sign register triggers, the output of the fourth element OR, the first inputs of the first and second BANNER elements and the second input of the sixth element AND, the output of which is connected to the fourth input of the failure of the display unit and. the second input of the sixth OR element, the first input of which is connected to the first failure input of the display unit and the output of the fifth IZH element, the first and second inputs of which are connected respectively to the second and third failure input of the display unit, the first and second sign inputs of which. connected respectively with the first and second register of the mark, per the left output of which is connected to the first input of the second and fourth inputs of the third switch, four 12А784216 the first and the first inputs of which are interconnected and with the direct output of the first sign trigger. 2 4S “7 L .J Fut.5 6 Sos: tav; ital V. Kopylov Editor I. Segl nik Tehred V. Kadar Proofreader V. But ha about. . Order 4124/47 Circulation 836 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d.4 / 5 Production and printing company, Uzhgorod, Projecto st., 4