SU861926A2 - Device for measuring linear displacements - Google Patents

Description

    -. one,.. . :. ..-- :: /: Iobrereieie refers to a device for high-precision measurement of linear reconnections

Basically. No. 462061, a device for measuring pinch movements, which contains: conversion of movement into an electrical signal, outputs that are connected to the first two inputs of the subtraction unit, a control unit, a memory unit, a dividing unit, combictor sources of exemplary figures of the measured value, whose inputs are connected to the inputs of the device and the first inputs of the first and second switches, the second inputs of the switches are connected to the outputs of the sources of exemplary increments of the measured value, and the outputs of the switches are connected to the input s pen displacements converters into an electric signal subtracting unit outputs through the third, fourth and fifth switches are respectively connected to inputs of blocks -k

the memory and one of the inputs of the division unit, the other input of which is connected to the output of the first memory block, the outputs of the memory blocks are connected to two other inputs of the subtractors, and

5, the control inputs of the switches are connected to the outputs of the control unit {l J.. .

In this device, the measurement result is obtained at the output of the block

10 divisions as a dependency

Mh | -Mg:,

K ((

ts

where the signal N from the outputs of the displacement transducers are functions, o% A | al;

20

Claims (2)

in ETIK expressions: Y is the measured value; X (5 initial value of the measured value; parameters of the conversion functions; D - exemplary increment of the measured value. The disadvantage of this device is the presence of an error as a result of measurement due to the inadequacy of the model of the conversion function of the real conversion function. This error is especially significant when using inductive and capacitive 1x transducers. The aim of the invention is to improve the measurement accuracy. The goal is achieved by the fact that the device is equipped with an arithmetic unit The solution of the power equation, the input of which is connected to the output of the division block, two blocks of formation of the initial value of the measured value, whose inputs are connected to the output of the arithmetical solution of the power equation, and the outputs - of the inputs of the corresponding sources of exemplary increments of the measured value and their The switch shows the block diagram of the device. The device contains identical transducers 1 and 2 movements into an electrical signal, block 3 subtraction, 1I: exact: 4 and 5 each increment of the measured value, switches 6-10, blocks P and 12 pA, mc, block 13 cfl, block 14 of control, arithmetic block 15 for solving power equations, and blocks 16 and 17 of forming the initial value of the measurand. Measured value through blocks 1 and 17 of forming the initial value of the measured value, sources 4 and 5 exemplary increments and switches 6 and 7 are connected to the inputs of identical transducers 1 and 2. The output of the transducers is connected to the subtraction unit J, the output of which through the switches 8 and 9 is connected to the memory blocks 11 and 12, and the switch 10 to the first input of the GB unit of the division. The output of the i2 memory block is connected to the input of the 3 subtraction unit, and the output of the P memory block to the input of the 3 subtraction unit and to the JBTOpoMy input of the dividing unit 13, the input of the power equation solving unit 15 is connected to the output of the dividing unit 13, and the output is connected to the blocks 16 and T7 formed the initial value of the measured value. The switches 6-IO are connected to the control unit 14. The device works as follows. The input value, the passage through v blocks 16 and 17 of the formation of the initial value, takes the values of% X, Xo-V, where XQ is an arbitrary initial value of the measured value, respectively. These values simultaneously arrive through switches 6 and 7 to the input of identical transducers 1. and 2, the output signals of which are sent to the readout block 3. Through the control unit open by the switch 8, the result of the subtraction enters the memory unit 11. At this time, switches 9 and 10 are closed. Thus, the IB memory block records the value of g Cl o + 2-0) X, N. And the output signals of the transducers, Qi-jWOi, are the parameters of the conversion function. Then the control unit switches switches 6 and 7 to a position in which sources 4 and 5 of exemplary increments of the measured value are connected to the transducer inputs. After that, the inputs Xot-C + A) and X0- (X + A) are respectively input to the converters. The output signals of the j-j and NA transducers are related to the input quantities by the ratios (o- + L) P2. () 4 CX-5)) + a. Signals1Y M- and Mj |. enter the subtraction unit, and from its output through the switch 9, opened by the control unit, into the memory unit 12. At this time, the switches 8 and 10 are closed. Thus, in memory block 12, the memory is stored {magnitude .a,) (). The output signals of the memory blocks I again are sent to the subtraction unit, to the output of which a signal equal to () -CN -N4) (402X0 -20 ) D. The indicated signal through the open control unit, the switch 10 is supplied as a divider to the input of the dividing unit 13. The value of -H2 passes to the second input of the division block as a dividend (4aiXo4-2c5i X from the memory block. As a result of the division at the output of the block, 13 division, the first measurement result of M -Na .V (.N ,, -N4) is obtained where & error from inadequacy of the model of the conversion function of the real formation function iipe. The signal from the output of the division block 13: is fed to the input of the arithmetic block 15 of the solution of the power equation that calculates the value of the initial level of the measured value. For example, when using inductive-transform Movers The emie value of the measured value is calculated by 1WS from the equations of the form The obtained value Xo is applied to form the initial value of the measured value for lock 16 and 17. Then the measurement process is repeated according to the algorithm suppressed above, and the adjusted measurement result is obtained at the output of the division 13, while the error of the inadequacy of the model of the transformation function of the real transformation function is missing. Invention A device for measuring linear displacements along the auth. No. 462061, 9 tl and so that, in order to improve measurement accuracy, it is equipped with an arithmetic unit for solving a power equation, whose input is connected to the dividing unit, with two units of the initial value of the measured value The inputs are connected to the output of the arithmetic unit of the solution of the power equation, and the outputs are connected to the inputs of the corresponding sources of exemplary increments of the measured Velich and associated with the latest switches. Sources of information taken into account for the examination of I. I. Author's network of the USSR No. 462061, cl. Soi B 7/02, 19.03.74.