SU1499300A1 - Method of automatic monitoring of analogue electric measuring instruments - Google Patents

Abstract

The invention relates to a measuring technique and can be used in the calibration and calibration of analog measuring instruments. The purpose of the invention is to increase productivity. The method is as follows. The scale of the device is projected onto the transmitting camera of the automatic reading unit 1. According to the video signals of the pointer with a period of T _{cf, the} coordinates of the pointer are determined. At the moment when the two successive coordinates of the pointer become the same, which corresponds to a fixed pointer, the error of the device is determined and the next reference signal is applied to the device being turned on. The period T _{c is} determined by the dynamic properties of the scanned instruments. In the drawing: registers 2,3 and 7, trigger 4, error calculation block 5, registration block 6, comparison block 8, reference signal block 9, terminals 10 for connecting scanned devices. 1 il.

Description

one

(21) 4330359 / 24-21

(22) 11/07/87

(46) 07.08.89. Book № 29

(71) Zhytomyr branch of the Kiev Polytechnic Institute. 50th Anniversary of the Great October Socialist Revolution of Brno

(72) Yu.V.Korolkov, A.N. Kirchun and G.V. Medvedev

(53) 621.317..761 (088.8.)

(56) USSR Author's Certificate No. 1320783, kp. G 01 R 35/00, 1985.

(54) METHOD OF AUTOMATIC TESTING OF ANALOG ELECTRIC MEASUREMENT DEVICES

(57) The invention relates to a measuring technique and can be used in the calibration and calibration of analog measuring instruments. The purpose of the invention is to increase the productivity. The way the key is j next. The scale of the device is projected onto the transmitting camera of the automatic reading unit 1. The pointer video signals with a period Tj, p determine the coordinates of the pointer. At the moment when the two successive coordinates of the pointer become the same, which corresponds to a fixed pointer, the response is divided into the error of the instrument and the next reference signal is applied to the instrument. The Trp period is determined by the dynamic properties of the scanned instruments. In the drawing: registers 2, 3 and 7, trigger 4, error calculation block 5, recording block 6, comparison block 8 reference signal block 9, glue {we 10 for connecting turnable devices. 1 il.

&

&

.l and

and,

one,. one" .

(3)

I.

where bt) - circular frequency of its own I

oscillations of the moving part of the device;

Taking into account the Toroj that in (e-K o (, „,

I.

missions

 d

/ (9)

After substitution of expression (9) in (2), we obtain the final expression

for t

wed

Wn

one

In,)

N.Cjl- / i

(ten)

the drawing shows a diagram of the device implements the proposed method

R trigger input. . -; -.;: cir.n--; . ; gomatic, ko) -o read by count ,,; gating pulses with a period of T (, p. At the time of gating on the video signal, pointer A triggers and coordinates are recorded in register 3. But the coordinates of the calibrated mark and pointer in block 5 calculate the error and reserve in block 6 of registration. block 6 is produced by an equality pulse coming from block 8 to compare w; To the information inputs A of block 8.

sob

Its structure includes an automatic reading unit 1, the first output of which is connected to the information inputs of registers 2 and 3, the second output -15 of the comparison comes from the coordinate of unit 1 connected to the input of the record re: - pointer nat from register 3, and to gistra 2 , and the third and fourth - corresponding to inputs B - from register 7, delayed. Correspondingly with the recording input and the installation of the R trigger 4, the output of which is connected.

at the time, i.e. recording the results of calibration is performed when

yen with register entry input 3, output 2o pointer set. The same signal is connected to the first input of the error calculation block 5, the second input of which is connected to the output of the register 2, and the output to the information input of the registration block 6. The input of the register entry 7 is connected to the output of the trigger 4, and the information input of the register 7 is connected to the output of the register 3 and the first input of the comparison unit 8, the second input of which is connected to the output of the register 7, and the output to the recording input of the block 6 and the input of the block 9 , reference signals, the output of which is connected to the terminals 10 for connecting a scanned instrument optically connected to the automatic reading unit 1.

The device works as follows.

Image of the scale being tested at the division of error, about tl and h

The boron is projected onto the transmitting television camera of the automatic reading unit I. The video signals of the inverted marks and pointer, allocated in the automatic reading unit 1, are received respectively at the recording input of the register 2 and the recording recording of the trigger 4, to the installation

Together with the fact that, in order to improve performance, in the interval between the determinations of the error in the video signals of the pointer, its coordinates are determined and compared among themselves, the reference signal is transmitted and the measurement is made when the coordinates are equal.

R trigger input. . -; -.;: cir.n--; . ; gomatic, ko) -o read by count ,,; gating pulses with a period of T (, p. At the time of gating on the video signal, pointer A triggers and coordinates are recorded in register 3. But the coordinates of the calibrated mark and pointer in block 5 calculate the error and reserve in block 6 of registration. block 6 is produced on the basis of a pulse of equality arriving from block 8 to compare w; To information inputs A of block 8

comparisons are received from the coordinate of the pointer from register 3, and to inputs B from register 7,

comparisons are received from the coordinate of the pointer from register 3, and to inputs B from register 7, the detainees.

at the time, i.e. recording the results of calibration is performed when

five

0

five

the scrap is fed to the next reference signal from the reference signal block 9 at terminals 10 The process is repeated,

Taking into account the specific output of devices for increasing the productivity of Pcp, it can be established by the formula (10), based on the dynamics of the instrument having the longest establishment time in a given batch.

Claims (1)

Invention Formula The method is automatic: g:, for example, analog electric devices of devices consisting in I poRiiji; lva-, scientific research institute instrument cabinets for transmission. the television camera, the reference signals to the object being scanned and the the division of error, of tl and h In order to improve performance, in the intervals between the definitions of the error, the video signals of the indicator are extracted, their coordinates are determined and compared to each other, the reference signal is fed and the measurement is made at the moment of equality of coordinates.