SU1164638A2 - Installation for automatic calibration testing of measuring instruments - Google Patents

Abstract

INSTALLATION FOR AUTOMATED MEASURING INSTRUMENT INSTRUMENTATION according to author. No. 966632, characterized in that, in order to extend the functionality by analyzing the result of calibration, the installation is optional. contains, connected to the auxiliary output of the operator's panel by the fourth input - the block of failures recognition, the inputs - the block of signs of failures, the block of probable causes of failure, the block of actions for failures, the block of repair instructions and the first input - the block of the heater connected to the second output of the recognition block a failure counter of the same type of failures, connected to a block of probable causes of failure by the second input a block for determining the probable cause of a failure and connected to a block of actions for failures by the second input of a decision block, The fault recognition block with the second input is connected to the additional output of the code comparison unit, the first input is connected to the additional output of the error calculator, and the third input to the output of the failure attribute block, the block for determining the probable cause of failure by the first input is connected to the first output of the failure recognition unit, the first output is with the first additional inputs of the memory, print and display units and the second output, c. the first input of the decision block, connected by the third (L input with the output of the repair instructions block, the first output with the second input of the block of the wok and the second output with the second additional inputs of the memory, print and display blocks, output counter of the same type of failures with the third additional inputs of the memory blocks, 4 printing and display, and the block behind - One output is connected to the fourth, with the additional inputs of the memory, printing and display units.

Description

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The invention relates to an information-measuring technique and can be used for automated calibration of measuring instruments having a pointer and a scale.

According to the main auth. No. 966632. a device for automated calibration of instruments is known, which contains a program device, a source of reference signals connected to the terminals of a device being scanned, a pointer position sensor, an analog-digital converter, a block of reference functions, a code sampling unit, a code comparison unit, an error calculator, a control unit, memory blocks, printing and display units, and a flJ operator panel.

This device possesses sufficient accuracy of verification due to the possibility of simultaneous comparison of the current codes of the actual (real) and reference functions of the conversion of the device being scanned, which eliminates the loss of information about the magnitude of the error between the digitized scale marks. However, this device does not allow to recognize the type of detected metrological failures and to choose solutions for further metrological service of the instrument being tested. As a result of verification with such an installation, defective devices that have failures that can be repaired at the place of operation are removed from service and sent to repair agencies, which leads to unjustified expenses of forces and means for their storage and transportation, as well as for the maintenance of a replacement. stock of appliances.

The purpose of the invention is to expand the functionality by analyzing the result of calibration.

The goal is achieved by the fact that the installation containing a series-connected operator console, a source of reference signals, terminals for connecting a measuring instrument to be turned on, an electric sensor for the position of a pointer to be scanned, an analog-to-digital converter, a code comparison unit, an error calculation unit connected to it the first output of the first inputs of the memory block, ne4638 2

chats and displays connected to their second inputs by a second output control unit, the input of which is connected to the first output of the operator's console connected by the first output to the input of the said control unit connected to the input of the program block whose output is connected to the second input of the source of reference signals, 0 the unit of reference functions and the unit of sampling the codes of reference functions, the first output of which is connected to the second input of the dose comparison unit ko5 and the first input of the program section, the second output - with its first input connected with its output the second input of the error calculating unit and the second input — with the third output of the operator’s console; additionally connected to the additional output of said operator’s console are the fourth input of the otgazov recognition unit, the inputs - the block of signs of failures, the block of probable causes of failure, the 5 block of failures, the repair instructions and the first input unit connected to the second output of the failure recognition unit; a counter of the same type of failures; A block of determining the probable cause of a failure connected with a block of probable causes of failure by the second input and a decision block connected to a block of actions for failures by a second input, the block recognizing the failures by a second input connected to an additional output of a code comparison block, the first input to an additional output of a block calculation of errors and the third input - with the output of the block of signs of failures, the block for determining the probable cause of the failure by the first input is connected to the first output of the block of recognition, the failures, the first output - the first additional inputs of the memory block, printing and display, and the second output — with the first input of the decision block associated 0 by the third input with the output of the repair instruction block, the first output with the second input of the queuing block and the second output — with the second additional the inputs of the memory blocks, the memory and the display, the counter of the same type of failures is connected to the output with the third additional inputs of the memory blocks, the speed reading and the display.

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The block by the output is connected to the fourth additional inputs of the memory, print and display locks.

The drawing shows a general, structural scheme of the proposed installation.

The installation contains an operator panel 1, a source of 2 reference signals, a control block 3, a code selection block A, an error calculation block 5, an indicator position sensor 6, an analog-digital converter 7, a reference function block 8, a code comparison block 9, a program block 10 , blocks AND memory, printing 12 and display 13, turnable device 14, block 15 of signs of failures, block 16 of recognition of failures, block 17 of possible causes of failure, block 18 of determining the probable cause of failure, block 19 of failures, block 20 repair instructions, block 21 of the wok, block 22 p Rin ty of decisions, the counter of 23 same failures.

Operator console 1. The first output is connected to the input of control unit 3, the second output to the source of 2 reference signals, the third output to the second input of block 4 of sample codes of reference functions and an additional output to the input of block 15 signs of failures, block 17 probable causes failure, block 19 actions in case of failures, unit 20 of repair instructions, with the first input of the unit 21 for the wok and the fourth input of the unit 16 for the recognition of failures. The source 2 of the reference signals by the second input is connected to the output of the program block 10, the output from the terminals of the measuring instrument 14 to be checked, which output is connected to the input of the electric sensor 6 of the pointer. The comparison unit 9 is connected with the first input to the first input of the error calculation unit 5, an additional output to the second input of the failure detection unit 16, the first input to the output of the analog-digital converter 7, which is connected to the output of the electric indicator 6 of the pointer. The unit 4 for sampling the codes of the reference functions by the first output is connected to the second input of the unit 9 for comparing the codes and the first input 646384

house block 10 of the program, the second exit. the house with the second input of the error calculation block 5, the first input with the output of the block 8 reference 5 functions. The failure detection unit 16 is first output connected to the first input of the likely cause of the failure cause unit 18, the second output to the counter of the same type of failures 23, the first input to the additional output of the error calculation unit 5, the third input to the output of the failure signs block I5. The block 18 for determining the probable cause of the failure, the second input is connected to the output of the block 17, the probable cause of the failure, the second output to the first input of the decision block 22, the first output to the first additional input of memory blocks 1I, printing 12 and display 13, which, by their first input, are connected to the first output of the error calculation unit 5, the second input is connected to the 5th second output of the control unit 3, the second additional input to the second output of the decision unit 22, the third additional input to the counter output 23 of the same type Q some failures and the fourth additional input - with the output of block 21 per wok. The first output control unit 3 is connected to the second input of the program block 10, the decision block 22 is connected to the output of the failure action block 19, the third input to the input of the repair instruction block 20, the first output to the second input of the block 21 after wok

0

The installation works as follows.

Before starting the calibration, the operator produces on the console 1 operator per

The set of the code of the instrument being tested is the Nvrcode of reference functions, which are being studied, and, if necessary, the codes of new signs of failures (x, t), new

causes of failures H nrcJfd (x, t) d, new actions in case of failures of H (new instructions for repairing H (pr | Fn New Prospectus, where 1.1 are, respectively, the scanned indices

device and reference function of permissible values; 3.8, Ф - respectively, the maximum sequence numbers of the existing signs of failures, types of failures and actions available for failures.

Commands corresponding to the dialed codes H „n and are received from the third output of the operator console to the second input of block 4 of the sample codes. From the first output of the operator's console I, selective commands are sent to the control unit 3 to allow the memory Lokov 1I, print I2 or display 13 to start up.

From the first output of the operator's control panel I, a command is also given that goes to the control unit 3 and sets the required number of operation cycles of the program block IO, depending on the specified verification quality indicator. From the second output of the operator's console 1, a command is sent to the second input of the source 2 of reference signals for its pre-switching.

From the additional output of the console 1, the operator is given commands to turn on the diagnostic system to the fourth input of the I6 block of recognition of failures, to enter into the block 15 signs of new signs of failures of scanned instruments; entering into the block 17 probable causes of the failure of new probable causes of the failure of turned-on devices, entering into the block 19 actions in case of failure of new types of failures of turned-on instruments; entering into block 20 instructions for repairing new instructions for repairing calibrated devices; input in block 21, for new wares for consumables, spare parts, tools, labor costs and cost of work.

The code sampling unit 4 recognizes the dial-ups on the control panel I of the operator of the scanner device code H and the codes of the reference functions of the allowable values of the basic error C inside arrays of similar codes. 8 reference functions stored in the unit and produce a synchronous sequential sampling of the current unit 8. codes S. reference conversion function, corresponding to Sv. checked instrument.

The specified codes for the first output of block 4 of sample codes are fed to the first input of block 10 of the program for implementing the software

liver automated calibration of this device.

At the same time, the sequence of codes Sf (x1, the reference function of the transformation of the instrument being scanned, contains the final code S ,; forming the signal code to ensure the return of the controlled

fO of the source 2 reference signals to the initial one are stable when processing the calibration test cycles. The detected code S of the instrument being scanned is sent from the second output of block 4 to the sample code through the error calculation block 5 (its second input) to memory blocks II, printing 12 or display 13.

At the command of the Verification given from the first output of the operator’s console 1,

20, the control unit 3, via its first output, launches the program unit 10, which, in accordance with the current codes of the reference conversion function S (x) i, arrives

25 at its first input from block 4, generates a program of operation of the source 2 reference signals. At the same time, the work program of source 2 is realized by supplying electrical

30 signals corresponding to the codes

SfjCx) from the output of block 10 of the program to the second input of source 2.

In accordance with these signals, the source 2 produces reference analog signals and supplies them to the scanned device 14 connected to the terminals of the source 2. The indicator of the scanned device starts moving.

The electric sensor 6 captures the current position of the pointer and outputs analog signals, proportional to the current position of the pointer, to the analog-to-digital converter 7, which converts them into Sfp (x) i ,, code sequences. representing the real function fp (x) i conversion of the instrument being checked. The Sfp (x) i codes of the actual conversion function are received in block 9 of the code comparison. At the same time, the codes of the reference functions of the allowed value of the main error of the instrument being checked from the second 55 output of the stroke sample block 4 in synchronization with the codes Sf (x) i are received in the error calculation block 5.

. The code comparison unit 9 performs a synchronous comparison of the current 7 real Sf (x) i codes and the reference SfjCx) functions of the conversion of the device being tested on the forward and reverse run of the pointer on each cycle tg and sends the results. „Lr 1-6 | . “, Comparing the codes / jS (x) i in the error calculation block 5. The error calculation block 5 processes the incoming information about the ratio of the real and reference functions of the conversion of the instrument being scanned and gives the results in the form of: a) codes for the evaluation function of the systematic error component Pr (06) x h. S (x) i calculated by m realizations of codes of real conversion function on forward and reverse course of pointer by formula w ДС, 6) codes of function of estimating standard deviation of random error component lilC J calculated by sampling of the same volume according to the formula ) ; P Wi-5f lv, T tuc c) of the evaluation function codes of the variation of the readable instrument Sfgvx) i calculated by the formula 5, lxh C4) 1; fs L Unit g} of the function of estimating the limit of the allowed value of the reduced error Sf ddop (x) i, computed. according to the formula) 1 .C.b.M ± Jf XH where Xf, is the normalizing value of the scales of the instrument being checked. In addition, the block 5 for calculating solutions resolves the metrological validity of the tested product by checking the following conditions (Ji sn,, 5 "ELSA" .. 5.,., () Wu5; (2) М,. 6 её . 5 ,, (.) 75, x) i, 5bA in () Sn () Ub e 5 A 88 gle U) i, S, (i), J ..Sf. (t) itjuCA A FUNCTION CODES of the reference functions of the permissible values of the errors of the instrument to be checked (H and b, respectively, the lower and upper values) received from block 4 and forwarded further to memory blocks 11, printing I2 and display 13. If the condition ( l) is performed, the device being tested is recognized as metrologically suitable, otherwise. In addition, he rejects according to the corresponding error characteristic. The operation cycle of block 10 of the program ends by submitting to its first input from the signal code es the first output of block 4 of the sample codes and returning the verification program to its initial state. At this point, from block 10 of the program, a command is sent to the second input of the source 2 of the reference signals to stop it. If the device is recognized as metrologically unsuitable, then the block 16 for declining failures compares the evaluation functions of the error components (x, t) i, (o) x, Sfg (x, tpi, and the difference codes dS (x, t.,)) during the last calibration (at the time ty.) as well as the estimation functions that make up the errors (x, t) i, ((x, t.,) and the difference of the codes g8 (x, tf ,.) obtained with the preceding and even earlier calibrations (entered from the operator’s console 1) with 15 signs of failures coming from the block in the form of arrays of function codes Spr5) A (.X, 1) ((X, 4 :-). resulting in choosing n Signs of failure -. tnp3) ii (np3) j (np3)) j Detected signs of failure are a set of signs of failure K for which, using probabilities of PCD diagnoses) and conditional probabilities of the complex K, for devices with a diagnosis DgPCK / Dj), coming from the block 15 signs of failures, in block 16, the recognition of failures is carried out according to the Bayesian method, the choice of the type of failure (diagnosis Cd) in accordance with the ratio p (c; | K) "x, x {P (pd | K) } - ,,,.,. LP (1),) P (,) In this case, the code S (np9) j of the detected tfiznak complex K, as well as the code) .s of the type of failure (diagnosis) i), where j and S are respectively the order numbers of the sign of failure and the type of failure, are fed into the counter 23 of the same type of failures and then into the memory blocks 11j of the printing 12 and display 13. In the counter 23, the counting and outputting into the memory blocks 11, printing 12 and display 13 of the total number of calibrations of the same type S, the total number of failures of the same type of devices 8 / A., the number of similar failures of the VA. and the number of the detection of the same type of signs 8. This allows plague performance power metal analysis instrumentation proxy and specify probabilities be failures (diagnoses) P (S2) and the conditional probability of failure symptoms complexes DIAT nozah When P () for povppeni authenticity discrimination failure mode. The code of the detected failure type enters block 18 of determining the probable cause of the failure. In addition, functions 18 of the error detection components (x, i), s; f A) CM3sSf, (st., And differences ASj (x, t) i real and reference function of converting a testable instrument as well as from a block of 17 probable causes of failure of signs of probable causes of failure 1pRO ";) 2D Az, Lp), d (|) La, S (, (K, i) 18 determining the probable cause of the refusal produces you a selection of signs of the probable causes of the refusal. of the probable cause of failure, for which, using probabilities of diagnoses P (D) and conditional probabilities of occurrence of the complex of features K of the instruments diagnosed with () coming from block 17, the probable causes of failure, in block 18 of determination. made according to the Bayesian method, the choice of the probable cause of the failure in accordance with the ratio p (l) / K-) n, ".. {p () l RSLG /. where ,, k). P (1) ,,) In this case, the code of the identified probable cause of the failure enters decision block 22 and memory blocks 11, printing 12 and display 13, where it is remembered. WITH ---- „,. It also shows the likely cause of the failure to take action to prevent similar meter failures. The decision block 22, in addition, through the block 18 for determining the probable cause of the failure, from the block 16 recognizes the failures, the code of the detected type of failure and from the block 19 for failures are received the codes of the types of actions for failures and their cost. In block 22, decision making for the identified metrological failure is made a decision on further metrological service of the instrument being checked (adjustment, replacement of the part or assembly, instrument decommissioning), based on the minimum restoration costs, i.e. if it is more profitable to write off the device and purchase a new one, than to replace the failed element and restore its metrological characteristics, then a decision is made to write off the instrument to be tested. Based on the accepted metrological maintenance of the instrument to be checked (for example, repairs), from repair instructions block 20, decision blocks 22, print 12 and display 13 receive the appropriate repair instructions. In addition, from block 22 of decision making, block 21 of the order receives a command to issue memory blocks 11, print 12 and display I3 in accordance with the adopted decision on further metrological servicing of applications for consumables, spare parts, tools, labor costs. and indicate the cost of the work, which allows you to plan repair work. At this the cycle of operation of the installation ends, and the installation is ready for verification of the next measuring device.

The use of the proposed installation makes it possible to recognize the type of detected metrological failures and to choose solutions for the further metrological service of the instrument being tested, which ensures a reduction in the time for searching for the failed element and, therefore, the overall

recovery time of the failed measuring device by 50-70%. This, in turn, leads to increased availability of turnable devices for use. Besides, . Automatic selection of a solution for further metrological servicing of the rejected device with detailed instructions for adjusting or repairing the cost of the necessary consumables, spare parts, indicating the cost of work and the necessary labor costs allows restoring the rejected devices at the place of operation. This, in turn, allows reducing the replacement stock of devices and leads to reduction of material and force costs for transporting rejected devices to repair bodies and back.

Claims (1)

INSTALLATION FOR AUTOMATED VERIFICATION OF MEASURING INSTRUMENTS according to ed. No. 966632, about t l -, characterized in that, in order to expand functionality by analyzing the result of verification, the installation is additional. contains, connected to the auxiliary output of the operator’s panel, the fourth input is a failure recognition unit, inputs are a block of failure signs, a block of probable causes of failure, a block of actions in case of failures, a block of repair instructions and the first input is a block of applications connected to the second output of the block, failure recognition a counter of the same type of failures connected to the block of probable causes of failure by the second input, a block for determining the probable cause of failure and connected to the block of actions in case of failures by the second input is a decision block, and the block fault recognition by the second input Connected to the additional output of the code comparison unit, the first input to the additional output of the error calculation unit and the third input to the output of the failure symptom block, the block of determining the probable cause of failure by the first input is connected to the first output of the failure recognition block, the first output - with the first additional inputs of memory, print and display blocks and the second _Λ output - p. the first input of the decision block connected by the third input to the output of the repair instruction block, the first output - with the second input of the request block and the second output - with the second additional inputs of the memory, print and display blocks, the counter of the same type of failure is connected to the third by the output additional inputs of memory, print and display units, and the application unit is connected with the fourth by the output. additional inputs of memory blocks, printing and display. SU.1164638> 1 1164638 chat and display connected to