SU1275343A1 - Device for calibrating instrument equipment - Google Patents

Abstract

This invention relates to a measurement technique. The purpose of the invention is to increase speed and simplify the device. It contains terminals 1 for connecting a calibrated measurement device, comparing the level 3 unit and level 4 setter, their interconnections and the connections between the elements. The simplification of the device is achieved by eliminating the need to control the level 4 setter and carry out the calibration characteristic through two points. Therefore, the control and statistical unit consists of a comparing unit 2 2, element OR 5, generator 6 pulses, analog-digital converter 7, keys 8 and 9 zero and level, respectively, counters 10 and 11 zero and level, respectively, element 12, delay lines 13 and 14 zero and level, respectively, adders 15 and 16 zero and level, respectively, subtractor 17, s $ divider 18. As a result of the introduction (L of the second channel zero, the averaged values of the output signal corresponding to zero and a fixed value of output signal, are present simultaneously. 1 yl.

Description

eleven

The invention relates to a measurement technique and can be used to determine the calibration characteristics of linear measuring instruments in a dynamic mode.

The aim of the invention is to increase the speed and simplify the device.

The drawing shows a block diagram of a device for calibrating measuring instruments.

Graduated measurement tool 1 is connected by an input to the first inputs of the comparing blocks 2 and 3 zero levels, respectively, the second input of the comparing block 2 zero is zeroed, and the second input of the comparing block 3 levels is connected to the unit 4 levels. The outputs of the comparing blocks zero 2 and level 3 are connected to the inputs of the element OR 5. The output of the element OR 5 is through a generator 6 pulses connected to the start input of the analog-digital converter 7 and the inputs of the keys zero 8 and level 9. The control inputs of the keys zero 8 and level 9 connected respectively to the outputs of the comparing blocks zero 2 and level 3 o The outputs of the keys zero 8 and level 9 through the counters, respectively, zero 19 and level 11 are connected to the control inputs of the same comparing blocks zero 2 and level 3, as well as the inputs of the element 12 And , output keys zero 8 and level 9 through delay lines, respectively, zero 13 and level 14, the delay time of which exceeds the conversion time of the analog-digital converter 7, are connected to the control inputs of the adders zero 15 and level 16. The output of the measurement means 1 through the analog-digital converter 7 connected to the inputs of adders zero 15 and level 16 connected to the inputs of subtracting unit 17. The output of the latter is connected to one input of the divider 18, which is connected to another input to the second output of the level 4 setter, and to the control input to the output of the I 12 element.

The device works as follows.

In the initial state, counters 10 and 11 and adders 15 and 16 are reset to zero, and comparing blocks 2 and 3 are open. The inputs of the measurement tool 1 and blocks 2 and 3 are being measured.

3

signal x (t) or a test signal close to it in dynamic characteristics. The second input of block 2 is zeroed out, and it issues a signal at x (t)

0. This signal, having passed the element OR 5, starts the generator of 6 pulses and opens the key 8 zero. The pulses of the generator 6 start the analog-to-digital converter 7 uniformly throughout

of time. Indications; the analog-digital converter 7 at x (t) 0 is summed up in the adder 15, and the number of such readings is recorded in the counter 10. If the number is equal

readings 10, 100, 1000 ... counter 10 outputs a signal locking the block 2. In the adder 15 after moving the comma to the left, respectively, by 1, 2, 3 ... decades, a zero offset is formed

calibration characteristics

- UOAnalogically, the second channel works, on the comparing unit 3 of which a constant signal X, corresponding to the selected level of the scale, comes from level 4 setpoint generator. At the output of the adder 16, an average value of the output signal of the measurement means 1 is formed, satisfying the condition x (t) x.

Block 17 subtraction subtracts the zero offset from it, and divider 18, at the command from the output of the element 12, divides it by the digital value of the levels, which comes from the second output

setting unit 4. As a result, at the output of the divider 18, the gain K of the calibration characteristic of the measurement means 1 is formed.

Technical (; cue device effect by

Compared with the known, it is in speeding and simplifying the device. The increase in speed is achieved by introducing a second channel | zero, as a result of which the average values of the output signal of the measurement tool 1, corresponding to zero and a fixed value of the input signal, are simultaneously and not alternately, as in the well-known

device. Therefore, the speed has doubled. Simplification of the device is achieved by the fact that it is not necessary to control the level adjuster and carry out the calibration characteristic

through two points. As a result of this, the control and statistical data processing unit consists entirely of an analog-to-digital converter, elec.

cops OR and AND, a pulse generator, two keys, two delay lines, two counters, two adders, a subtractor and a divider. Invention formula

A device for calibrating measuring instruments, containing terminals for connecting a calibrated measuring instrument, the input terminal of which is connected to the first input of a comparing level unit, another input connected to a level setting device, characterized in that, in order to speed up and simplify | 5 devices, it includes an analog-to-digital converter that compares a zero block, an OR element, a pulse generator, two keys, two counters, two delay lines, two totalizers, an AND element, a subtractor and a divider, and one input comparator unit

) 34

the zero is connected to the input terminal for connecting the calibrated measuring instrument, and the other is zeroed, the wiring {zero of the zero and level matching blocks are connected via the OR element and the pulse generator to the start input of the analog-digital converter and the first inputs of the keys connected by the control inputs to the outputs of the matching blocks , and the outputs through the delay lines — with the control inputs of the adders, and through the counters — with the inputs of the AND element and the control inputs of the comparing units zero and zf, the output terminal for connecting the gradient uemogo measuring instruments through analog-to-digital converter, adders and subtractor connected to the first input of the divider, a second input connected to a second output level set point and control input - with the output member I.

Claims (1)

The claims ⁵ A device for calibrating measuring instruments, comprising terminals for connecting a calibrated measuring instrument, the input terminal of which is connected to the first input of the level comparing unit, another input connected to the level meter, characterized in that, in order to improve speed and simplify the device 15, an analog-digital converter was introduced to it, comparing the zero block, the OR element, a pulse generator, two keys, two counters, two delay lines, two totalizers 20, element I, a subtractor and a divider, and one input d, the zero comparison block is connected to the input terminal for connecting the calibrated measuring instrument, and the other is zero, the conclusions of the zero and level comparison blocks are connected via the OR element and the pulse generator to the start input of the analog-to-digital converter and the first key inputs connected by the control inputs to the outputs of the comparison blocks and outputs through the delay line with the control inputs of the adders, and through counters with the inputs of the element And and the control inputs of the comparison blocks of zero and level, the output terminal for Connections of a calibrated measuring instrument through an analog-to-digital converter, adders and a subtraction unit are connected to the first input of the divider connected by the second input to the second output of the level gauge, and the control input with the output of element I.