SU1096316A1 - Yarn monitoring apparatus - Google Patents

Abstract

A YARK CONTROL DEVICE containing a high voltage generator, two yarn thickness sensors located at a fixed distance from each other in the direction of the yarn movement, an adjustable delay unit, the first input connected to the output of the first yarn thickness sensor, BTopbw input - with the output of the first integrator, and the output with the first input of the multiplication unit, the second input of which is connected to the output of the second yarn sensor, and the output through the first integrator is connected to the input of the pulse generator, subtraction unit, expander The second, integrator and recorder, characterized in that, in order to extend the functionality by controlling the twist of the yarn, it has a unit for allocating the high-frequency component of the signal, a comparator, a pulse counter, a yarn thickness adjuster and an And element, with the output An adjustable delay unit is connected to the pair input of the subtraction unit via a high-frequency signal extraction unit and to a pulse counter input, the control input of which is connected to the output of the pulse generator, and expand output The pulses are connected to the first input of the element I, the second input connected to the comparator output, and the output to the first input of the recorder, the second input of which is connected to the output of the pulse generator, and the output of the second yarn thickness sensor is connected to the second input of the subtractor whose output is CO via the second integrator, it is connected to the first input of the comparator, and finally, the input connected with the output of the unit thickness control unit. 05

Description

one

The invention relates to textile industry, in particular to devices for controlling yarn when it is produced on spinning machines.

A device for controlling yarn is known, comprising a high voltage generator, two yarn thickness sensors located at a fixed distance from each other in the direction of yarn movement, an adjustable delay unit, the first coupling input with the output of the first yarn thickness sensor, the second input with the output of the first integrator, and the output with the first input of the multiplication unit, the second input of which is connected to the output of the second yarn thickness sensor, and through the first integrator is connected to the input of the pulse generator ,, subtraction unit, extension pulse puller, second integrator and recorder 1,

A disadvantage of the known device is its limited functionality, which makes it impossible to control the twisting of the yarn.

The purpose of the invention is to expand the functionality of the account by controlling the twist of the yarn.

The goal is achieved by the fact that a device for controlling yarn, containing a high voltage generator, two yarn thickness sensors is located at a fixed distance from each other in the direction of the two yarn, an adjustable delay unit, the first input connected to the output of the first thickness sensor yarn, the second input - with the output of the first integrator, and the output - with the first input of the multiplication unit, the second input of which is connected to the output of the second yarn thickness sensor, and the output through the first integrator is connected to the input of the generator pulse pulse, subtraction unit, pulse expander, second integrator and recorder have a high frequency component extraction unit, a pulse counter comparator, a yarn thickness setting unit, and an element, while the output of the adjustable delay unit is connected to the first input through a high frequency component selection unit the subtraction unit and with the input of the pulse counter, the control input of which is connected with the generator output n f pulses, and the output through the pulse expander connected to the first

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input element 1: TA, the second input connected with the output of the comparator, and output with the nepi5buvi input pzriicrits-icpa whose second input is connected to the output of the pulse generator, and the second input sensor of the yarn is connected to the second input 1 of the reading unit, the output of which is ZTS is a integrator of the city; connected to the first input of the comparator, the second input of the yarn thickness adjuster associated with the zglotsy

In FIG. Figure 1 shows the block diagram of the device, in figch 2, temporal diagrams of the operating voltages explaining the operation of the device.

In the direction of movement of the buckle 1, a high-voltage generator 2 and yarn thickness sensors 3 and 4 are located. Sensor 3 is connected to the first input of the block 6 at 1 times 5, the second sensor connected to the output of the sensor 4, Vy.d. A block 6 unit through an inverter 7 is connected to an input of a pulse generator 8 and to an input of a variable delay unit 5, which through a selection module 9 extracts a high-frequency co-signal and is connected to the first input of the subtraction unit 10 and to the input of a pulse counter 11 of pulses. The charging input of the counter 1 1 impulses is connected to the generator 1 of the impulses 8, and ББ;: У; ОД through the expander 12 impulses - to the first input of the element 1.3 1.3 whose second input is connected to the output of the separator 14, the output of the element 13 is connected to the first logger entry

the second input is connected to

In the code of the generator 3 pulses, Ey, the stroke of sensor 4 is connected to the second subtraction of the current control subtraction 10, the output of which through the integrator 16 is connected to the first input of the comparator 14, the output of the transducer 17 of the current thickness of 1 1. The entrance to the comparator 14.,

The device works. It follows the clclBOM trail

With the passage of sections of yarn 1 past ge.aerator-a 2 high April, polarization of the yarn fibers occurs:

they are raspr mp yuts. and occupy a position perpendicular to the trunk of the yarn. As a result, signals (diagrams a and 5 of FIG. 2) 5 coming from sensors 3 and 4 (for example, photovoltaic) j contain as a high-frequency component of a ignore; characterizing the yarniness of the yarn, as well as the low-frequency component of the signal, which characterizes the change in the thickness of the yarn along its length. The signal from sensor 3 is delayed in block 5 of the adjustable delay by the transport delay time t -2 / V, where P is the distance between the sensors. V is the linear speed of the yarn (plot B), and is fed to the first input of multiplication unit 6, the second input of which receives a signal from sensor 4. The voltage from multiplicating unit 6, smoothed in integrator 7, automatically controls the time of transport delay - due to the uneven speed of movement of the yarn, the change of which occurs due to the design features of the torsion-winding mechanisms of the spinning machines. In addition, the signal from the output of the adjustable delay unit 5 enters the high frequency component extraction unit 9 of the signal, where its high frequency signal component (plot 1-) is allocated to the first input of the subtraction unit 10, the second input of which receives the signal From sensor 4, as a result, at output of subtraction unit 10, a signal (plot and) is detected, reflecting a change in yarn thickness along its length. Due to the uneven thickness of the yarn along its length, to obtain a signal reflecting the change in the average diameter of the yarn bore, the signal from the subtraction unit 10 is smoothed in integrator 16 (plot e 1) and is fed to the first input of the comparator 14, the second input of which is constant Voltage (plot II) from the unit 17 of the thickness of the yarn, characterizing 164 the value of the diameter of the yarn at a critical twist. From the output of the high frequency component extraction unit 9, the signal simultaneously arrives at the input of the pulse counter 11, to the control input of which pulses are received from the pulse generator 8. The latter generates reset pulses (plot g), the frequency of which depends on the speed of the drive and the level of the initial setting of the frequency. The pulse counter 11 in the interval between the reset pulses is filled with the frequency of the signal received from the block 9 of the high-frequency component of the signal. As the frequency of the pulses increases from block 9 above the established rate, the counter 11 overflows and an overflow pulse (plot 3) appears at its output and goes to the pulse expander 12, in which it lengthens for a period of time (plot m). With simultaneous input to the inputs of the And 13 element from the comparator 14 (plot k) and from the expander 12 pulses (plot and), a signal appears on the eio output (plot l) indicating the occurrence of the critical twist of the yarn, which is recorded by the recorder 15. To determine the size and location of the section of yarn with critical twist, the recorder 15 simultaneously records the frequency from the generator 8 pulses. The economic effect of using the present invention is provided by expanding the functionality by controlling the twist of the yarn. ildyo and

Claims (1)

A YARN CONTROL DEVICE, comprising a high voltage generator, two yarn thickness sensors located at a fixed distance from each other in the direction of yarn movement, an adjustable delay unit, the first input connected to the output of the first YARN THICKNESS sensor, BTOpbtM input - with the output of the first integrator, and output - with the first input of the multiplication unit, the second input of which is connected to the output of the second yarn sensor, and the output through the first integrator is connected to the input of the pulse generator, the subtraction unit, the pulse expander, A second integrator and recorder, characterized in that, in order to expand functionality by controlling the twist of the yarn, it has a high-frequency component of the signal extraction unit, a comparator, a pulse counter, a yarn thickness adjuster and an And element, while the output of the adjustable delay unit is through the selection unit the high-frequency component of the signal is connected to the first input of the subtraction unit and to the input of the pulse counter, the control input of which is connected to the output of the pulse generator, and the output through the pulse expander is connected to the first input of the And element, the second input connected to the output of the comparator, and the output to the first input of the recorder, the second input of which is connected to the output of the pulse generator, and the output of the second yarn thickness sensor is connected to the second input of the subtraction unit, the output of which is connected through the second integrator to the first input of the comparator, the second input associated with the output of the yarn thickness adjuster. SU „„ 1096316