SU1627821A1 - Device for measuring linear displacements - Google Patents

Abstract

The invention relates to a measurement technique and can be used to measure - small displacements. It is an invention to extend functionality by providing measurements of the linear deviations of complex profiles. The device contains a clock-type indicator, on the axis of which is fixed arrow 1 with three protrusions, and a dielectric plate 5 with paired with three graduated cabinets of electrically conductive material offset by one third of division relative to each other. A measuring circuit is connected to arrow 1 and graduated cabinets 6-8, which measures the movement when the arrow moves in the forward and reverse directions, which makes it possible to measure deviations of complex profiles with high accuracy. 1 part f-ly, 2 ill. WITH

Description

17 - comparator 20 and one-shot 23. 20 one-shot and also the first element

From the output of the one-shot 23 pulse is applied to the R-input of the trigger 28, S-input of the trigger 24 and the first inputs of a pair of logic elements And 31 and 32. At the same time

OR, pulse counter and scale converter, so that, in order to expand its functionality, it

on the inverse output of the trigger 25 has-25 is equipped with a third graded scale III and

with I and the pulse from the one-shot 23 passes through the logical element And 32 and the scheme OR 34 to the summing input of the counter 35.

In case of violation of the sequence of signal passage, namely when the arrow I returns from the third scale 8 counterclockwise to the second 7, the direct output of the trigger 24 has 1 and the pulse from the one-oscillator 22 passes through the AND 29 logic element and the OR 33 logical element to the subtracting the input of the counter 35, thereby automatically this pulse is subtracted from the total sum of the pulses of the counter 35. Thus, when the arrow 1 is moving in one direction, the pulses are summed, and in the other - are subtracted, the pulses arriving at the counter 35 are fed, in turn, to the input of the large-scale converter 36, and from the output of the latter they are fed to an automated control system.

By using the device, a positive effect is achieved, which consists in extending the functionality by reliably measuring linear displacements of complex profiles by providing the possibility of an automatic reversing counting of pulses, leading to the elimination of errors in measuring complex profiles.

35

Loi connected with it by the third measuring channel identical to the first two, three RS-flip-flops, three pairs of elements AND and the second element OR, all the annular scales are marked on one side of the dielectric plate and shifted relative to each other by a third division, the output of the single-oscillator the first measuring channel is connected to the first inputs of the first pair of elements And, the R input of the second three Gera and the S input of the third trigger, the output of the single measuring channel of the second measuring channel with the S input of

4Q flip-flop, with the first inputs of the second pair of elements And and the R input of the third flip-flop, the output of the one-shot third measuring channel - with the R-input of the first flip-flop, S-input of the second

45 trigger and the first inputs of the third pair of elements AND, the forward and inverse outputs of all the triggers are connected to the second inputs of the corresponding pair of elements AND, the outputs of the first elements AND of all pairs are connected to the inputs of the second element OR, the outputs of the second elements And all pairs - with the inputs of the first the OR element, the output of the first element OR is connected to the summing input of the counter, and the output of the second element OR to the subtractive input of the counter.

2. The device according to claim 1, about tl and - so that the arrow is 55

equipped with a third graded scale

Loi connected with her third measuring channel identical to the first two, three RS-flip-flops, three pairs of elements AND and the second element OR, all the annular scales are applied on one side of the dielectric plate and shifted one-third of the first measuring channel is connected to the first inputs of the first pair of elements And, the R-input of the second trigger and the S-input of the third trigger, the output of the one-channel second measurement channel with the S-input of the first

trigger with the first inputs of the second pair of elements And and the R-input of the third trigger, the output of the one-channel third measurement channel - with the R-input of the first trigger, S-input of the second

trigger and the first inputs of the third pair of elements AND, the forward and inverse outputs of all the triggers are connected to the second inputs of the corresponding pair of elements AND, the outputs of the first elements AND of all pairs are connected to the inputs of the second element OR, the outputs of the second elements AND of all pairs - with the inputs of the first element OR , the output of the first element OR is connected to the summing input of the counter, and the output of the second element OR to the subtracting input of the counter.

2. The device according to claim 1, about tl and - so that the arrow you

7 .16278218

It is filled with three protrusions, located on the axis, perpendicular to the plane with hollows at different distances from its graduated scales.

1 5 2

I NlN 1

FIG. g

Claims (2)

1 "A device for measuring linear displacements, comprising a dial-type indicator with an arrow, a dielectric plate connected to the indicator with two graduated ring graduated scales of electrically conductive material, and a measuring circuit including a high-frequency generator connected through a transformer to the indicator arrow and ring graduated scales, two measuring channels, each of which is connected to the corresponding ring scale and contains a matching trans a formatter, filter, comparator and one-shot, as well as the first OR element, a pulse counter and a scale converter, characterized in that, in order to expand the functionality, it is equipped with a third graduated scale, a third measuring channel associated with it, identical to the first two, three RS-flip-flops, three pairs of elements B and the second element OR, all the ring cabinets are applied on one side of the dielectric plate and are offset from each other by a third of the division, the output of the one-shot of the first measuring the channel is connected to the first inputs of the first pair of AND elements, the R-input of the second trigger and the S-input of the third trigger, the output of the one-shot of the second measuring channel is connected to the S-input of the first trigger, with the first inputs of the second pair of the elements AND and the R-input of the third trigger, output one-vibrator of the third measuring channel — with the R-input of the first trigger, the S-input of the second trigger and the first inputs of the third pair of AND elements, the direct and inverse outputs of all the triggers are connected to the second inputs of the corresponding pair of AND elements, the outputs of the first elements And all the pairs are connected, with the inputs of the second OR element, the outputs of the second elements AND of all pairs - with the inputs of the first OR element, the output of the first OR element is connected to the summing counter input, and the output of the second OR element - with the subtracting counter input. 2. A device according to claim 1, wherein the arrow is made with three protrusions located at different distances from its axis, perpendicular to the plane of the graduated ring scales.