SU1524068A1 - Device for monitoring electronic objects - Google Patents

Abstract

The invention relates to automation and computing and can be used to increase the reliability of an assessment of the technical condition of objects (TCO) by using sequential analysis (PA), in particular, the sequential criterion of the ratio of probabilities Wald. The purpose of the invention is to increase the reliability of the control. The device contains sensors 1 parameters, switch 2, the normalizer 3, ADC 4, the first 6 and second 10 setters of calculation coefficients, the first 7 and second 11 multipliers, the first 8 and second 15 adders, the first 9 and second 12 accumulating adders, the first 13, second The 16 and third 21 keys, the setting unit 14 of the reference parameter values and the indicator 17, the clock pulse generator 18, the frequency divider 19, the comparison circuit 20, the counter block 22. Using the PAD method for estimating the TCO allows, on average, to reduce the number of measurements by half required level to tovernosti, increase the level of automation in deciding operatively control the probabilities of errors E 1st and 2nd kind according to pred is emymi requirements of reliability of control for each of the parameters. 4 il.

Description

(iMij yes), (

1 i i i i, jkJ

tt

ibi (cy

fXJ - / “,. X ,, ... Hu ln} -C ,, Ci,.,., Cm f

,

The Wald probabilistic ratio criterion. The purpose of the invention is to increase the reliability of the monitoring. The device contains 1 parameter sensors, switch 2, normalizer 3, ADC 4, first 6 and second 10 setting factors, first 7 and second 11 multipliers, first 8 and second 15 adders , the first 9 and the second 12 accumulating adders, the first 13, the second 16 and the third 2 keys, the setting unit 14 of the reference values of parameters and the indicator 17, a clock generator. The invention relates to automation and computing and can be used to evaluate those of the state of the controlled object and prediction of the moment of its withdrawal for prevention

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

Fig, 1 shows the block diagram of the device; Fig 2 shows the synchronization diagram of the operation of the device blocks; FIGS. 3 and 4 are a p-score diagram using the serial analysis method.

The device contains parameter sensors - 1, switch 2, normalizer 3, analog-digital converter 4, accumulator 5 of measurement results, first setting unit 6 for calculating the upper limit value of the parameter, first multiplier 7, second combiner adder 8, first accumulating adder 9, second setting unit 10 for calculating coefficients of the extrapolated parameter value, second multiplier 11, second accumulating adder 12, first key 13, setting unit 14 of reference parameter values, first combinational adder 15, W Doi key 16, an indicator 17, a generator 18, a clock frequency divider 19, Comparisons circuit 20, the third switch 21, the counter unit 22.

The device operates as follows.

The generator 18 and divider 19 perform the functions of the device synchronizer. Synchronizer generates signals А А ,, A ,, .., AL; with

pulses 18, frequency divider 14, comparison circuits 20, meter block 22, Using the PA method in evaluating the TCO allows an average of two times reduction in the number of measurements to achieve the required confidence level, increase the level of automation when making a decision, quickly control the probability errors of the 1st and 2nd kind in accordance with the requirements for the reliability of the control for each of the parameters about 4 or about

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- С,, 0 ,,,,, С S J - 8.0, Sj, which determine the sequence of processing information about the system parameters and synchronize the operation of the node B of the device, where L and m are respectively the number of controlled objects and parameters. The normalizer 3 performs the representation of various electrical quantities of the controlled paramigres of objects at a certain voltage scale and is implemented on an operational amplifier with a change in the gain factor. The gain is automatically set by the control signals fA, sJ in the range of the signal S,. A change in the gain is made by switching resistors in the feedback circuit of the amplifier. The ADC 4 converts the voltage (currents) from the output of the normalizer to a digital binary code o

The operation of the device is carried out in real time, cyclically with a polling period of objects T. In turn, each of the periods TC consists of polling periods of parameters Tf, j 1, t ". Thus, the control of a set of objects and parameters is carried out on the basis of the time principle Separation of the output of the switch 2 can receive information at the current time no more than one physical sensor that performs the functions of measuring any parameter of one of the objects.

Digital binary code, taken from the output of the ADC 4 and carrying information about the measured value of one of the parameters, is fed to the drive 5 and the first accumulating adder 9. In blocks 6–9, circuit 20 and blocks 21 and 22 using the sequential analysis method for each successive measurement, two hypotheses are tested: H is the parameter in the tolerance; H - the parameter is higher than the tolerance. As a result of checking for the J-ro parameter at the m-th step (test) the sum

and,

(one)

one

where Ujj is the result of the i-ro measurement of the j-ro parameter, and the condition is checked (fYoZ).

J

m

,

(2)

exhalation (2) value of A; and

jm

Are linear functions and are calculated by the formulas

 jm

AT,; + TB,

(3)

 J

 2J

+ TV

where in

 2J

In expression (4).

C - dispersion measurement error;

In the first multiplication unit 7, the product mB,; is formed, with the value Bj. comes from block 6, and

P

Blj

P

AT,}

hypothesis H is missed, while true competing hypothesis is H,); - the second upper threshold j-ro

which is equivalent to the inoperability of the object); - the first upper threshold of the J-ro parameter (the maximum permissible value, if not exceeded, the object functions with high efficiency).

from the value of A: and Rj in accordance with the expressions (3) "In Scheme 20

oi - the tolerance is probable; the value of m is from block 22 V of the first

side of the 1st kind (if the deviation combiner 8 is formed, hypothesis H is formed, while it is true);

| 5 - the probability of comparison error is permissible; comparison of a side of the 2nd kind is carried out (if the current amount received from

block 9, with values A; And K. sh, coming from block 8, and forming a solution in accordance with conditions (5). Decision results through

of the parameter (maximum admittance - the third key 21 is supplied to the indicator value, exceeding 17) If the decision is connected with the acceptance of one of the hypotheses (n, or H), the signals from the output of circuit 20 are fed to the inputs of block 22 to zero the contents of the corresponding counter, and a block 9 for zeroing the contents of the first accumulating adder by the monitoring parameter. The accumulator 5 records and

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When checking the condition (2), the formrus is one of three possible solutions,

YU

if A-, then the hypothesis is accepted

if,:; Rjm ° is accepted

hypothesis H

one

if, then tested (5)

Neither continue

If the parameter is characterized not only by the upper thresholds, but also by the lower thresholds (tolerances), the calculation is carried out using expressions of the form (l) - (4), except that in the expressions

5 (4) values and Ilftji should be replaced respectively by the values of Пц ,: and Пц. If the upper and lower thresholds are symmetrical with respect to the nominal value of the parameter Lcc, the need for parallel calculations for both thresholds is eliminated

In the first accumulating adder 9, an amount is formed in accordance with the expression (|). The preliminarily calculated values of B j,, Bjj are written in the setpoint generator 6, Block 22 performs the calculation of the number of tests m for each of the parameters. The number of counters included in block 22 is L x

0 X t, the size of each counter, n, is determined from the ratio

n logjam „, where m d, scr - the maximum allowed

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the number of tags (tests), after which the decision must be made

In the first multiplication unit 7, the product mB,; is formed, with the value Bj. comes from block 6, and

d the value of m - from block 22 in the first

from the value of A: and Rj in accordance with the expressions (3) "In Scheme 20

combiner adder 8 form-

Q

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storing the values of the last N measurements for each of the m parameters of all L objects of the cantrol. The drive contains L m N N cells. Recording and counting the words in the accumulator control S divides the signals GLA, jCl, S, bodies 19 °. The measurement results from accumulator 5 are transferred to the second multiplier 11, with which, as well as using the unit 10 and the second accumulating adder 12 calculation of the extrapolated J-ro value of the parameter Uj

BUT

U;

according to the expression

N

 a; ei ;;; i, N; j i, m.

one(

ai3UijJ

where a ;, is the extrapolation coefficient of the result of i-ro measurement

The values of the coefficient a, for each i-ro measurement, are calculated previously based on the expression

3 | () - 2i AN + 7ltJ.Oi "ig - TMN 2T

The coefficient setter. 10 serves to record and store the coefficients of a - and performs the functions of a semi-permanent storage device with a capacity of N words.

The values of Uj through the first key 13 arrive at the second adder 15, where

the magnitudes and values of the deviations D are calculated; extrapolated pad values of ujg from nominal values

l

uj

U:

- and.

, j, - vjhj

The values of the nominal values are stored in the setting unit 14 and according to the signals A ;, the Cj divider 19 frequencies are inserted into the adder 15 °. The reference setpoint generator is a permanent storage device with a capacity of L m memory cells

Indicator 17 is used to visually assess control results. For this purpose, the digital values received at its inputs from blocks 21 and 15 are converted to analog values and stored for at least T o. For each parameter, the parameter number, the upper and lower tolerances of the deviation from the nominal, the current extra deviation are displayed on the indicator. - a polished value of the nominal value, the final conclusion about whether the parameter is in the tolerance or not in the tolerance.

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Claims (1)

Invention Formula A device for monitoring radioelectronic objects, containing parameter sensors, a switch, a normalizer, an analog-digital converter, a storage of measurement results, the first Unit of coefficients for calculating the upper boundary value of a parameter, the first multiplier, the first accumulating adder, the second unit of coefficients for calculating the extrapolated parameter value, the second multiplier, the second accumulating adder, the first key, the setting unit of the reference parameter values, the first Raman adder, the second key, and Indicator, clock pulse generator, frequency divider, third key, parameter sensor outputs are connected to the information inputs of the switch, the output connected to the information input of the normalizer, the output of which is connected to the data input of the analog-digital converter, the output of which is connected to the input of the measurement results accumulator, which output connected to the input of the first multiplier of the second multiplier, the input of the second multiplier of which is connected to the output of the second factor calculator extrapolated the second value of the second multiplier is connected to the data input of the second accumulating adder, the output of which is connected to the data input of the first key, the output of which is connected to the input of the first term of the first combinational adder, the input of the second term of which is connected to the output of the reference parameter values, and the output with the data input of the second key, the output connected to the first data input of the indicator, the second data input of which is connected to the output of the third key, the output of the clock pulse generator All of them are connected to the input of the frequency divider, the sync outputs of which are connected to the corresponding synchronous inputs of the switch, the normalizer, the analog-digital converter, the accumulator of measurement results, the second unit of factors for calculating the extrapolated parameter value, the first, second and third keys, the unit of reference parameter values and the indicator, characterized in that. In order to increase the reliability of control, a second combinational adder, a comparison circuit and a block of counters are entered into the device, the output of the analog-digital converter is connected to the input of the first term of the first accumulating adder, the output connected to the first input of the circuit with the counter input connected to the output of the counters, and the output to the input component of the second combination adder, the input of the second component connected to the second output of the fifth unit of calculation of the coefficients of the upper boundary value of the pairs, movement of the second Raman The output of which is connected to the score of the adder is connected to the second input. the first input of the block of counters, with the input of the data of the third key and the input of the second term of the first accumulating adder, the first output of the first setpoint of the calculation coefficients of the upper 15 parameter limit value is connected to the input of the first multiplier calculating the upper boundary value of the parameter, the comparison scheme, the first multiplier and the first Raman adder. m is / REO isted the input of the counter block connected to the output and the output to the input of the first term of the second combiner adder, the input of the second addend connected to the second output of the first set factor for calculating the upper limit value of the parameters, the output of the second combinator adder connected to the second input Comparison circuits, synchronous inputs of the frequency divider are connected with the corresponding synchronous inputs of the first setter of calculation coefficients of the upper limit value of the parameter, the comparison circuit, the first multiplier and the first Raman adder. REO is defective S / 5 fig.Z t / OU vlg / ipymt4fJOHupyem I with high efficiency (t G Fyy Odget is not a slave about that Ying and