SU1760311A1 - Textile material length measuring device - Google Patents

Abstract

The invention relates to a measurement technique and rips 2 length measurements of textile materials can be used. The aim of the invention is to improve the measurement accuracy. When a measuring tape moves with a controlled material fixed on it with the help of clamps, the tag attached to one of the clamps periodically enters the zone of action of the position sensors, the signals from which are received by the control unit. Odnfemog. About registries of the registers dmni - Asko ko: kktsii and current values of length The n.v.n post signals from the dpini sensor. In the second section of the block, the beetle is produced; and measurement results h psn .-; e disbrztoatkm received signals. 2 Il.

Description

The invention relates to. the field of engineering for light industry and can be used to measure the length of textile materials.

It is known a device for measuring the length of rolls, textiles and plastics, containing a measuring tape, measuring roller: shafts for compensating for the Nygheri-na.

The disadvantage of this device is e ... errors pr. And measurement dpln :. The cuts are measured when the measuring measure slips relative to the drive drum and the material relative to the measuring tape. In addition, the measuring tape itself is pulled out during operation, which leads to a change in the linear gear ratio and the occurrence of errors in measuring the length.

A device 2 for measuring moving materials, a mechanism for applying an electrolyte solution as labels and reading them are known.

A disadvantage of this device is the stability of the position of the edge of the mark, which determines the beginning and end of the reading of the reference area due to dissection of the electrolyte deposited on the spot, the frequency of measuring. wo go, p: (.-gi ng between neighboring 1 m. btcism, mmya on material in one contact with tr; and: with a sporting shaft, k, -, - post-window deformation of them, and after it. Thus, the radius of the e-ion and the ос ises and we marks that control the inverse and the end of the counting of the pulses, as it floats in the measurement zone, which leads to an additional error. when labels are placed on the section of the bending of the material /; ohm of the transport shaft, then the distance between them is also affected by the thickness

s

material, which is also a source of error. The use of liquids as labels limits the technological capabilities of the devices.

The aim of the invention is to improve the measurement accuracy

The goal is achieved by the fact that the device is equipped with a conveyor belt, kinematically connected with transporting shafts, clamps installed on the conveyor belt with the possibility of pressing the controlled material to it, a marker mark made in the form of a metal flag installed rigidly on one of the clamps with the possibility of with position sensors, the measurement result correction block is made in the form of a control block, the dynamic correction register, the first and second inputs of which It is connected respectively to the first and second outputs of the control unit, the current length register, the input connected to the third input of the dynamic correction register, and the computing unit, the inputs connected to the outputs of the dynamic correction registers and the current length value, the input register of the current length value forms the first input of the block correct the measurement results, the first and second inputs of the control unit, respectively, its second and third inputs, and the output of the computing unit is the output of the corrector unit ktsii measurements.

FIG. 1 shows the scheme of the proposed device; Fig. 2 shows the following loop control system of the material.

A device for measuring the length of textile materials comprises a belt conveyor drive consisting of an engine 1, a shoe 7, a gear 2, a worm gear 3, a chain transfer 4, a driving drum 5, a tension drum 27, three conveyor belts 6, which are dimensional. The mechanism of asynchronous material supply to measuring tapes contains an electromagnetic clutch 8. flywheel 9, gear 10, worm gear 11, chain gear 12, feed shaft 13, pressure shaft 14. The angular speed of the feed shaft 13 is greater than the angular speed of the driving drum 5, which provides material feed to measuring tapes in free state. In order to securely adhere the material with the tape along the edge of the belt conveyor and cyclically clamp and release the material, one of the measuring tapes is installed with a predetermined pitch of the material 15 sec.

a roller 35 and a spring 36. and on the device case two otpodchiki 33 and 34 are fixed. For reliable, without slipping clutch of the measuring tapes with the driving drum, metal eyelets are mounted along the edges and teeth on the driving drum. The dynamic correction device contains a label 16, made in the form of a metal flag attached to the material clamp 15, position sensors 19 and 20 located on the reference length from each other, a length sensor 28 consisting of a disk with cutters 17 fixed on the shaft drive drum

5 and optocouplers 18, control unit 21, dynamic correction register 22, register of current value of length 23, computing unit consisting of subunits 24, 25, recorder 26. Follower control system

0, the material loop comprises photodiodes 29, and 30, an illuminator 31, an electromagnetic clutch control unit 32.

The device works as follows.

5When engine power up

It is transported by the feed shaft 13. The free end of the material is picked up by measuring tapes, clamped by the clamps and moved by a belt conveyor.

0 Due to the different angular velocities of the feed shaft 13 and the drive drum 5 of the belt conveyor, the material is fed into the measurement zone in a free, undeformed state. Next

5, the system allows control of the size of the material loop. When there is an excess of material, a loop is formed, overlapping the photodiode 30. The signal from the photodiode 30 is fed to the input of the electromagnetic control unit

0 by clutch 32, which turns on electromagnetic clutch 8. Electromagnetic clutch 8 opens a kinematic chain, transmitting motion to the supply shaft 13. Once the material loop is selected, photodiode 29 opens and the electromagnetic clutch control unit 32 disconnects the electromagnetic clutch 8, which closes the kinematic chain of the feed drive shaft 13. The material is fed to the measured

The tape on the straight section of the upper branch of the belt conveyor eliminates the influence of the thickness of the material being measured on the measurement accuracy. When moving the conveyor belt

5, the clamps 15 move with it relative to the sensors 19 and 20, coupling the measured material with the tape in the straight portion of the conveyor and freeing the material in the curvilinear portion of the trajectory of the clamps 15 under the influence of

the paths of the retractors 33 and 34 installed on them. When the measuring tape moves, the label 16 attached to one of the clamps 15 of the material gets into the zone of action of the sensor 19 of the beginning of the standard measure of length, which supplies the input of the control unit 21 to a pulse signals that null the dynamic correction register 22 and allow the passage of pulses from the length sensor 28 to the input of the register 22. At the same time, the pulses of the length 28 transmitter are fed to the register input of the current length value 23. in which the current length value is stored. The pulses from the sensor of length 28 correspond to a certain angle of rotation of the driving drum 5 and, consequently, to a certain movement of the measuring tape 6. The label 16, having passed the reference distance 10, falls into the zone of action of the sensor of the end of the standard measure of length 20, which supplies a pulse to the control unit 21 where the control unit 21 sets a signal prohibiting the passage of pulses from the length sensor 28 to the input of the dynamic correction register 22. Thus, the code of the number of pulses from the length sensor is stored in the dynamic correction register 22 28 corresponding to the passage of the measuring tape 6 of the reference distance 0. This code is fed to the first input of the subunit 24, to the second input of which, before the start of the measurement, the code of the value of the standard measure of length is entered. Subunit 24 implements the dependency

TO

J °.

PC

where lo is the standard measure of length;

PC is the number of pulses from the length sensor 28, recorded in the dynamic correction register 22 and corresponding to the reference length measure;

Cd - dynamic correction factor.

The code of the value of the dynamic correction coefficient from the output of the subblock 24 is fed to one of the inputs of the subblock 25, to the other input of which from the output of the register of the current length 23 is fed the code of the current value of the length of the material. Subunit 25 implements the dependency

IT Cd Fri,

where Fri - the number of pulses from the output of the sensor of length 28, corresponding to the current value of the length of the material

IT is the current length of the material.

The adjusted value of the current material length from the output of the subblock 25 is fed to the recorder 26.

Claims (1)

Thus, for each revolution of the measuring tape, the value of the current length of the material is adjusted. Apparatus of the Invention A device for measuring the length of textile materials, comprising transporting shafts, a pulse sensor associated with one of the transporting shafts, two position sensors disposed at a predetermined distance from each other along the direction of movement of the material being monitored, a measurement correction unit whose first input connected to the output of the pulse sensor, the second and third respectively to the first and second position sensors, a register connected to the output of the measurement result correction block eny, characterized in that, in order to increase the measurement accuracy, it is provided with the transporting belt is kinematically associated with the conveying rollers, clamps, mounted on the conveyance belt to press the test material thereto, the marker tag formed of a metal flag, installed rigidly on one of the clamps with the ability to interact with position sensors, the results correction unit is made in the form of a control unit, a dynamic correction register, the first and second inputs of which are connected respectively to the first and second outputs of the control unit, the register of the current length, the input connected to the third input of the dynamic correction register and the computing unit, the inputs connected to the outputs of the dynamic correction register and the current length, the input of the register of the current length forms the first input of the correction unit of measurement results, the first and second inputs of the control unit, respectively, the second and third inputs of the control unit, and the output of the computing unit Is the output of the measurement correction block. fJ f2 // fO 1 1 G I D FIG. 2