SU1231388A1 - Device for measuring linear displacements - Google Patents

Abstract

The device relates to a measurement technique and can be used in automatic control and regulation systems. The aim of the invention is to improve accuracy and speed. The goal is achieved by the fact that the nominal load characteristic is entered into the correction unit, and information about linear displacements at the first moment of time is stored in the first memory block, where it is stored until the next clock cycle, which is set by the TALST generator. The second cycle of information will be rewritten in the second memory block, and in the first memory block the information due to the next child will be recorded. Then, according to the processing algorithm, the information enters the dividing and multiplying units, as a result of which the actual load characteristic of the device is determined, the deviation of which from the nominal one determines the multiplicative measurement error due to various perturbative factors. 2 Il. (Ls

Description

The invention relates to a measurement technique and can be used in automatic, control and regulation systems.

The purpose of the invention is to increase the accuracy and speed of the device.

Figure 1 presents the block diagram of the proposed device} figure 2 is a graph of the correction of the load characteristics,

The device contains a measuring unit 1, the output of which is connected to the input of the second unit. 2 memory whose output is connected to the input of the first memory block 3 memory, the first code of the second dividing unit 4 and the first input of the first dividing unit 5. The output of the first memory block 3 is connected to the second input of the first block: 5 divisions, the output of which is connected to the first input of the multiplication unit 6, the output of the load response correction unit connected to the first input of the block 7. The second input of the multiplication unit 6 is connected to the first output of the load response correction unit 7, the second output of which is connected to the second input of the second unit

4 divisions. The output of the second power unit 4 is connected to the second input of the load response correction unit 7 and is the output of the device. The second input of the measuring unit 1, the third inputs of the multiplication unit 6, the second division unit 4, the nejmoro unit

The 5 divisions and the correction unit 7 are equipped with the agglomeration and visual characteristics and are connected to the output of the clock generator 81.

The device works as follows.

Exposed; nominal load; on characteristic i with tilt angle fti (FIG. 2), and this information is entered into block 7, information on linear displacements X at the first time moment is hominoed in block 2, where it is stored until the following clock, which is specified by the clock generator 8, With the eye clock, the information from block 2 is rewritten into block 3, and block 2 records information i due to the following point in time, as a result, information about the measured parameter X is successively in. different times are written and erased in blocks 2 and 3 like a shift register memory.

If the load characteristic I deviates from the initial value D

1231388

under the action of various kinds of perturbing factors, a multiplicative measurement error arises (Fig. 2).

The condition when this error is O can be written as

 1-1

(one)

from where

X,

1-1

CL, -Y Vj-,. Vj .. V,; V, and.

(2)

If a change in the output parameter M is determined only by a change in the parameter a with x const (Fig. 2), then

W.

1-1.

(3).

about . about

Since, under actual operating conditions of the system, the change in the parameter a and the measured quantity X can occur simultaneously, the dynamics of the measuring process can be represented in the following way. ;

When the moment corresponds to 1 "index O, the value of y is measured and the variable xx is calculated and a" is recorded in block 7,

At the moment t

index

su i-1 measure x value. outcome

Vj., From condition X. -, calculate

1-1 "o

value 4. , by the expression (3).

V.

g 1

(a.j) and write to block 7, erasing the previous value.

If the moment is 1, the index-, su m measure the value of X. (.,

; , ./ -,: Y: .. calculate the value of a (,; - - a

At:

.

and write to block 7 instead of the previous value a.,.,. So late on. one measure ut t, -t- ,. clock generator, multiplicative error correction is performed. Taking into account that the rate of change of the error A l / d is significantly less than the frequency of the clock generator, it is always possible to choose a frequency that would significantly reduce the multiplicative measurement error.

Shape Splash

 A device for measuring linear movements containing a measuring unit, two memory units, two division units, a multiplication unit and a clock unit.

The generator is different. In order to improve accuracy and speed, the device is equipped with a load response correction unit, the output of the measuring unit is connected to the input of the second memory unit, the output of which is connected to the input of the first memory unit, the first input of the first division unit and the first the input of the second dividing unit, the output of the first memory unit is connected to the second input of the first dividing unit, the output of which is: connected to the first input of the multiplication unit, and the first output (load correction unit x)

characteristics - to the second; the input of the multiplication unit, the output of which is connected to the first input of the correction unit to the load characteristic, the second output of which is connected to the second input of the second division unit, the output of which is connected to the second input of the load characteristic correction unit and is the output of the device, and the clock generator outputs are connected to the input of the measuring unit, to the third inputs of the multiplication unit, the division units and the correction unit of the load characteristic.

fuf.t

Editor A. Ogar

Compiled by A.Grigor nts

Tehred V.Kadar Proofreader V.But ha

Order 2555/46 Circulation 670 Subscription

 VShPI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (2)

Claims ⁵⁵ A device for measuring linear displacements comprising a measuring unit, two memory units, two division units, a multiplication unit and a clock 3 1231388 4 generator, with the additional characteristics - to the second; the unit’s input. in order to improve accuracy and speed, the device is equipped with a load characteristic correction unit, the output of the measuring unit is connected to the input of the second ”memory unit, the output of which is connected to the input of the first memory unit, the first input of the first division unit and the first input of the second division block, the output of the first memory block is connected to the second input of the first division block, the output of which is: connected to the first input of the multiplication block, and the first output of the load correction multiplier block, the output of which is connected to the first input of the load characteristic correction block, the second output of which is connected to the second input of the second division block, the output of which is connected to the second input of the load characteristic correction block and is the device output, and the clock outputs are connected to the second input of the measuring block, to the third inputs of the block multiplication, dividing blocks of the th block correction load characteristics.