SU1132280A1 - Device for monitoring parameters - Google Patents

Abstract

DEVICE FOR CONTROL. The PARAMETERS containing the first time measurement unit include the first And element and the first pulse counter, the comparison block node containing the first, second, third and fourth comparison blocks, and a full comparison block connected by the first input to the output of the analog-digital converter, the second input to the output of the first register, and the first output to the first input of the first element I, connected with the output to the counting input of the first pulse counter connected by the output to the first inputs of the first and second comparison blocks, the third and third registers connected by outputs with the first inputs of the third and fourth comparison blocks, the fault inputs {and - with the fault input of the first register and the first control output and the first control input of the program block connected by the second control and information outputs, respectively respectively to the control and information inputs of the first, second and third registers, characterized in that, in order to improve the speed of the device, a second time measurement unit, not containing The second element And and the second pulse counter, the third time measurement block containing the third element And and the third pulse counter, the first and second R5 trigs, the first, second, third and fourth elements OR, the fourth and | 7th elements H and its generator frequency, connected to the second input of the first element AND and the first input of the second element AND connected by the second input to the second output of the fifth I comparator unit, the third input c. with the direct output of the first RS flip-flop and the third-star input of the first J element And, and the output with the counting input of the second pulse counter and with the first input of the third And element connected by the second input to the output of the first And element connected with the counting input of the third pulse counter, connected by a fault input to the output of the first NLI element, to the fault inputs of the first pulse counter and the second pulse counter, connected by an output to the second input of the third comparison unit and the second input of the first block and connected by the first and second outputs to the first inputs of the fourth and fifth And elements, respectively, connected by the second inputs to the direct output of the second RS trigger, connected by a 5 input to the output of the fourth comparison block, the first R input to the first input the first element of the RTBI, to the first f-pass of the first RS trigger and to the first

Description

the control output of the program block, the second R-input to the second control input of the program block, the h / second R-input of the first RS flip-flop, the second input of the first OR element and the output of the second OR element connected with the first and second inputs with the outputs the third and fourth elements OR, connected by the first inputs to the outputs of the fourth and fifth elements, respectively, and the second inputs to the outputs of the second and third blocks, respectively, and the first input of the third comparison unit is connected to the second input the second comparison unit, and the second input of the fourth comparison unit with the output of the third pulse counter.

The invention relates to instrumentation technology and can be used in automated systems for monitoring complex objects. A device for monitoring parameters J contains a program block whose first input is connected via a tolerance driver to the first control input of the program block, the first comparison block, the control input of which is connected to the corresponding output of the program block, and the information input to the output of the second comparison block. However, the total time of control of a complex object using a known device remains relatively large even in cases where a larger number of parameters satisfy the specified requirements. The most closest to the offer is a device for controlling frames containing one block of settings memory, one the output of which through the first tolerance driver is connected to the first comparison unit, a. the other output is connected to the measurement interval generator unit, the second comparison unit and the second tolerance generator, one input of the second comparison unit through the time measurement unit is connected to the output of the first comparison unit, another input of the second comparison unit is connected to the output of the tolerance generator, and the third The input of the second comparator unit is connected to the ycTajaoK memory output unit via the measurement interval former block. The device measures the total time the parameter is outside the tolerance and forms the final decision on the validity of the monitored parameter, if the total time the parameter is outside the tolerance did not exceed the allowable value defined by program 2. The disadvantage of the known device is poor performance Reliability is fundamentally said with a waste of time. The purpose of the invention is to increase the speed of the device. The goal is achieved by the fact that the device for control. parameters, containing the first time measurement unit, including the first element AND and the first pulse counter, the unit of the comparison units containing the first, second, third and fourth comparison units, the fifth comparison unit, connected by the first input to the analog-to-digital code the converter, the second input - to the code of the first register, and the nepBbw output to the first input, the first element AND, connected to the output with the counting input of the first pulse counter, S connected by the output to the first inputs of the first and second comparison blocks, the second the third registers connected by outputs with the first inputs of the third and fourth comparison blocks, respectively, the fault inputs with the fault input of the first register and the first control output and the first control input of the program block connected by the second control and information outputs to the control and information to the inputs of the first, second and third registers, a second time measurement block is inserted, containing a second And element and a second pulse counter; a third time measuring block containing t ety AND gate and the third pulse counter, the first and second -triggery R5, first, second, third and fourth OR elements, the fourth and fifth AND gates, and a frequency generator connected to the second vkodom. the input of the first element .and the first input of the second element I connected by the second input to the second output of the fifth comparison unit, the third input to the direct output of the first R3 trigger and the third input of the first element I, and the output to the counting input of the second pulse counter and with the first input of the third element AND, connected by the second input to the output of the first element AND, connected with the output to the counting input of the third pulse counter, connected by the fault input to the output of the first element OR, to the reset inputs of the first counter I1 PU The second pulse counter connected to the second input of the third comparison block and the second input of the first comparison block connected by the first and second outputs to the first inputs of the fourth and fifth And elements, respectively, are connected by the second inputs to the second output of the second RS trigger, connected by the 5 input to the output of the fourth comparison block, the first R input to the first input of the first OR element, the first R input of the first R5 trigger and to the first control output of the program block, the second R input to the second control the input of the program block, to the second R-input of the first H5 trigger, the second input of the first OR element and the output of the second OR element connected by the first and second inputs to the outputs of the third and fourth OR elements, respectively, connected by the first inputs to the fourth and n outputs, respectively And, and the second inputs to the outputs of the second and third comparison blocks, respectively, the first input of the third comparison block is connected to the second input of the second comparison block, and the second input of the fourth comparison block with you the course of the third pulse counter.

As a result, the requirement for the oddness of the code determining the time limit for the execution of the procedure of increasing the reliability is necessary for the normal operation of the device.

FIG. 1 is given a block diagram of the proposed device; Fig. 2 is a graph of the law of the distribution of the parameter values (curve 1) and control errors (curve 2), illustrating the achievement of increasing the reliability with the use of the proposed device.

The device contains a parameter measurement unit 1 comprising an analog-digital converter 2 and a fifth comparison unit 3, a first time measurement unit 4 comprising a first pulse counter 5 and a first element AND 6, a second time measurement unit 7 containing a second element 8 and a second counter 9 pulses, a third time measurement unit 10 containing a third element 11 and a third counter .12 pulses, a pulse generator 13, a comparison block node 14 containing first, second, third and fourth comparison blocks 15-18, a fourth and fifth elements AND 19 and 20 per out, second, third and fourth elements OR 21-24, first and second triggers 25 and 26, first, second and third registers 27, 28 and 29, block 30 of programs containing the decoder 31, photo reader 32, fourth register 33, p Element OR 34, Delay Element 35, Start Button 36.

The device works as follows.

The control loop of the next parameter is started by sending a Start signal to the input of the photo reader 32 from the Start button 36 or from the output of WLI element 22. At the Start signal, the photo reader 32 provides line-by-line reading from the punched tape of the parameter control program.

The address part of the program, arriving at the decoder 31, is decrypted, in accordance with which control signals arrive at the control inputs of the corresponding registers 27, 28 and 29. The information inputs of these registers 1 out of the output of the photo reader 32 supply the settings defining the software limitations on parameter control. In the register 27 enter the code of program settings for the parameter, for example, the nominal value for admission. In the register from block 30 of the programs, a code is entered that defines the time limit for the execution of the confidence increase procedure. The register is served with a code defining the requirements for permissible reliability. Codes entered into registers 27, 28 and 29 are stored for the parameter monitoring time. Register 33 is used to enter command codes for the Start, Reset or Stop () modes of the device. Command The reset sets the registers, counters, and triggers to their initial state. In the parameter measurement block M, in the comparison block 3, the parameter transformed by analog-digital-1 by the converter 2 to the code is compared with the tolerance received in block 3 compared with the register 27. The code stored in register 28 acts on the inputs of blocks 16 and 17 of the comparison. On one input of the comparison block, the code stored in the register .29 acts. This code determines the period during which it will be carried out with the procedure of increasing the reliability if the required value of a reliable type will not be reached. For normal operation of the device, it is necessary that the code entered by the register 29 is odd. This makes it possible to exclude the possibility of a Tailing of equal values in blocks 4 and 7 at the end of the period of the execution of the procedure for increasing the reliability. The result of the comparison of the parameter in block 3 of the comparison with the tolerance on it — the signals are Pass or Not pass — is fed to the inputs of blocks 4, and 7 of time measurement. The signal is valid at the input of block 7, and the signal is not valid at the input of block 4. In blocks 4 and 7, the total residence time of the parameter outside the tolerance (in tolerance) is measured, respectively, during the time allotted for monitoring the parameter, after the procedure increase the reliability of controls. The countdown of the execution time of the procedure for increasing the reliability of the congrol begins after the start command is entered into the register 33. This command from the output of register 33 is fed to the inputs of the flip-flops 25 and 26. Trigger 25, on the Start command, sets an enable potential at the inputs of the elements 6 and 8, which, during the action of the corresponding signals from the output of the comparison unit 3, ensures the passage of the reference frequency from the generator 13 through elements 6 and 8 to the inputs of counters 5 and 9. At the same time, the reference frequency from the outputs of elements 6 and 8 through the elements k 11 enters the input of the counter 12 of block 10, where the current time for monitoring the parameter is calculated. The current results of time stamping by blocks 4, 7, and 10 from the outputs of counters 5, 9, and 12 are fed to node 14 of comparison blocks, where in blocks 16 and 17 of the comparison, the total residence time of the parameter beyond the tolerance is compared and in the tolerance measured by blocks 4 and 7 matches, with a validity tolerance Supplied to other inputs of blocks 16 and t comparisons from register output 28. The result of comparing a parameter with a tolerance on it will be considered final as soon as this or other block 16 or 17 compares the achievement of a code to image yzims in counters 5 and 9, a predetermined limit - tolerance reliability. The signal from the output of block 16 or 17 of the comparison, which first recorded the achievement of the specified tolerance for reliability, through the elements SHI 24 or 23 goes to the output of the device, and through the elements SHSh 22 and 34 to the photo reader 32, which proceeds to the next tact of the monitoring program . At the same time, this signal resets the triggers 25 and 26. In the event that the prescribed reliability of the monitoring result is not reached during the time allotted for the increase reliability procedure, the comparison unit 18 will record the end of the time interval allocated for the reliability improvement procedure. Signal

from the output of the comparison unit 18 by setting in one state the trigger previously reset by the signal Resetting from the output of the block 33. The high potential of the trigger 26 is open, the elements AND 19 and 20, resulting in the signals from the outputs of the comparison unit 15 passing in the same way as described through the elements OR 24 , 23 and 22 to the input of photo reader device 32.

Block 15 of comparison, in contrast to blocks 16 and 17, records in which of the counters 5 or 9 the value is greater at the time of the end of the procedure for increasing the reliability of the control. The final result is recognized as valid when the code in the counter 9 is higher than the code recorded in the counter 5 at the moment the procedures for decreasing the validity are completed. Otherwise, the final result is deemed unsuitable.

. Since the reliability of the result of the control, formed when the required confidence value is reached, is higher than the result of the control, which is formed only due to the npocjip-rth comparison by the principle where it is greater. at the output of the device, it is necessary, simultaneously with the result of monitoring, to indicate a sign indicating the degree of confidence with which the control of one or another parameter was performed.

Such a signal arrives at the output of the device from a single output of the trigger 26 and means by its appearance that the required reliability of control of the parameter has not been achieved. However, even in this case, the reliability of the control will be higher than without the execution of the procedure for increasing the reliability.

As can be seen from the graph below (Fig. 2), the parameters for increasing the reliability require parameters whose values are in zones II, where the random component has the greatest influence on the result of the control. At the same time, the values of the overwhelming majority of parameters are in zone J, where the influence of the random component on the result of the control is much less than in zone P, the situation with parameters whose values are in zone 10 is similar. Consequently, for parameters whose values lie in zone I and PG, where the influence of the random component is weakened, the required value of the total residence time in the tolerance (outside the tolerance) is reached before the time allotted for increasing the reliability of the control in the known device.

The proposed device allows reducing the time of control of complex objects and, consequently, reduces the cost of their maintenance.

vx / IT yyvL vvvl-rHvv

Amin4

Claims (1)

/ 54) DEVICE FOR MONITORING 'PARAMETERS, comprising a first time measuring unit, including a first AND element and a first pulse counter, a unit of comparison units containing the first, second, third and fourth comparison units, a fifth comparison unit connected to the first input to the output of the analog-to-digital converter, the second input to the output of the first register, and the first output to the first input of the first AND element, connected by the output to the counting input of the first pulse counter, connected by the output to the first inputs of the first and second comparison shafts, the second and third registers connected by the outputs to the first inputs of the third and fourth comparison blocks respectively, the reset inputs - with the reset input of the first register and the first control output and the first control input of the program unit, connected by the second control and information outputs respectively to the control and information the inputs of the first, second and third registers, characterized in that, in order to increase -the device’s speed, it contains a second time measuring unit, neither containing a second And element and a second pulse counter, a third time measuring unit containing a third And element and a third pulse counter, the first and second R5 triggers, the first, second, third and the fourth element OR, the fourth and fourth elements And the frequency generator connected to the second input of the first element And and the first input ^ of the second element And ° connected ' ^{z the} second input to the second output of the fifth ι comparison unit, the third input. with the direct output of the first RS-trigger and the third input of the first .j element And, and the output with the counting input of the second pulse counter and with the first input of the third element And connected by the second input g to the output of the first element And, connected by the output to the counting input of the third pulse counter connected by the discharge input to the output of the first OR element, to the discharge inputs of the first pulse counter and the second pulse counter connected by the output to the second input of the third comparison unit and the second input of the first comparison unit, sub connected by the first and second outputs to the first inputs of the fourth and fifth elements, respectively, connected by the second inputs to the direct output of the second R5 trigger, connected by the S input to the output of the fourth comparison unit, the first R input to the first input of the first OR element, to the first -Input of the first RS trigger and to the first control output of the program block, second R input to the second control input of the program block, ^ second R input of the first RS trigger, second input of the first OR element and output of the second OR element, connected first and second inputs with outputs of the third and fourth elements of OR, respectively, connected by the first inputs to the outputs of the fourth and fifth elements of And, respectively, and the second inputs to the outputs of the second and third comparison blocks, respectively, with the first input of the third comparison block connected to the second input of the second block comparison, and the second input of the fourth comparison unit with the output of the third pulse counter.