SU1535904A2 - Apparatus for monitoring the consumption of warp yarn - Google Patents

Abstract

FIELD: textile industry. The purpose of the invention is to improve the accuracy of control. A characteristic feature of the device is the presence in it of rasters installed between the radiation sources and the photoreceivers of the corresponding optocouplers. These rasters are similar in design to the raster of an opaque screen. To achieve this goal, it is necessary that the distance between the rasters and the raster of the opaque screen should not exceed the ratio of the square of the distance between adjacent opaque raster lines to the wavelength of the light emitted by the sources of optocoupler pairs. 2 Il.

Description

The invention relates to the textile industry and is complementary to the main author. No. 1463820,

The purpose of the invention is to improve the accuracy of control.

FIG. 1 shows a block diagram of the device; in fig. 2 - voltage diagrams at the outputs of the main elements of the devices,

The device includes means for measuring the length of the warp threads and monitoring the weft thread, including opposite sources of light 1 and photodetector 2, identical optocoupler pairs (for example, three), formed sources 3, 4, 5 radiation, photodetectors 6, 7 , 8 and rasters (gratings) 9, 10, I1, respectively, and

a light-tight screen 12, the length of which L4 is longer than the length of the linear photodetector 2. Screen 12 has two parts: part and the screen height is opaque and part b is made in the form of a grid (raster) with alternating transparent and opaque areas of equal width, the spacing between which D1 is less than the advance advance up of the warp threads for one weft weave. In this case, the screen part a moves between the linear light source (and the photodetector 2, and part b modulates the light fluxes of optocouplers. The device also contains a computing unit including the EXCLUSIVE OR 13 block, differentiating block 14, two detecting blocks 15, 16, and matches (elements AND) 17, 18, 19, the element AND-NOT

tn

with

SP

WITH

N)

20, numerical reference 21, RS-triggers 22, 23, counter 24, reversible counter 25, wherein the output of the linear photoreceiver 2 is connected to the input of the differentiating unit 14, the output of which is connected to the inputs of the detecting units 15, 16, the outputs of which, in turn, are connected to the R and S inputs of the RS flip-flop 23, the outputs of the flip-flop 23 are each connected to one of the inputs of the matching circuits 18, 19, and their outputs to the inputs Summation and Subtraction of the reversible counter 25, outputs of the numerical setting device 21 and the counter 24 is connected to the inputs of the element AND-HE 20, the output of which is connected to the free inputs The signals of the coincidence circuits 18, 19, the inputs of the RS flip-flop 22 and the counter 24 are connected to the output of the detecting unit 15, the outputs of the photodetectors 6, 7, 8 are connected to the inputs of the unit 13, the output of which, as well as the output of the trigger 22 , the output of which is connected to the counting input of the reversing counter 25. The output of the counter 25 (also known as the output of the computing unit) is connected to the recorder 26,

In the initial position, the control number MROCIDTCH DEFINITION THREAD M5 i-LOCM is entered in the numerical setting indicator 21

22, 24, 25 are discarded, a means for imbuing the length of the base and controlling the weft of the weft is installed above the base yarns (the fastening bracket is not shown), and the screen 12 is moving in the area of the means synchronous movement.

The device works as follows.

Screen 12, moving back and forth synchronously with the movement of the warp threads, modulates its opaque part a and the light flux of the linear light source 1. At the output of the linear photoreceiver 2, a signal V2 f (t) is formed (Fig. 2), after differentiating which 1- short short-polarized pulses are obtained, with a positive pulse determining the moment when the warp (screen) starts moving forward and negative backward. After the arrival of the first positive pulse emitted by the block 15, the RS flip-flop 22 is set, tchik 24 starts counting number prokidok weft yarn. Simultaneously, the resolving unit logic level from the output

the trigger 22 arrives at one of the inputs of the coincidence circuit 17, the other input of which receives pulses from block 13. Since the lattices of the adjacent optocouplers are shifted along the direction

base motion by pd1 value

+ 61

2K

(where n is 1, 2, 3, ..., and K is the number of optical pairs), then at their outputs, when they cross their light fluxes by the screen grating 12 (light strikes the photoreceivers of optocouplers, when the slots are aligned, they are transparent the areas of the lattice of the screen 12 and the lattices of the optocouplers) form a series of phase-shifted pulses (Fig. 2, plots V6, V7. V8). All three of the last series are given to the LF inputs of the EXCLUSIVE OR block (modulo 2 addition) 13, the output of which forms a series of three-frequency pulses (compared to an impulse frequency (Gs from one optical pair). From the output of the coincidence circuit, 17 pulses are sent to the counting input of the reversible counter 25. At the same time, until the counter code 24 reached the value N of the setter 21, the output of the NAND 20 circuit is at the level of log 1, which goes to one of the two inputs of each of the matching circuits 18, 19. trigger 23 is set (goes to the state of the log. 1) according to the impulse from block 15 (forward movement) and reset by impulse from block 16 (backward movement). At the same time, through the coincidence circuits 18, 19, the counter 22 is transferred to the summation or subtraction of the counting pulses. the counter 24 reaches the value N, it stops (the stop circuit is not shown), at the output of the NAND circuit 20 a log level appears. O, which blocks the coincidence circuits 18, 19. The counter 25 stops counting, it stores the accumulated number, which is further is displayed by the registrar 26. This number (in pulses), n is proportional to the path traveled by the base for the number of weft yarns equal to N, and characterizes (taking into account the N value) the number (length) of the warp that arrives at each weft throw, and this parameter in turn determines the processing of the main yarns in the process weaving The true job (defined by GOST) is determined by

conversion table or graphics dll specific article number of fabric.

Claims (1)

Claims of Invention A device for measuring the processing of a warp of a warp according to the author. No. 1 63820, characterized in that, in order to increase the control accuracy, it is equipped with additional rasters for the number of optocoupler pairs, similar in design to the raster of the opaque screen, each additional raster is installed between the source the radiation and the photoreceiver of the corresponding optocoupler perpendicular to its optical axis, the distance between adjacent additional rasters is equal to the distance between the optical axes of adjacent optocouplers, and the distance between each additional raster and raster of the opaque 10 screen does not exceed a value equal to the square of the distance between adjacent opaque lines of rasters to the wavelength of light of the radiation sources of optocouplers. 8b / BSU / 7U / 7Ge / LH6 / M & 7OM Phi.1.4 um UK PA 6 and and Ji t i t -t E t (rig I