SU314832A1 - DEVICE FOR THE FORMATION OF RANDOM THROTTLES ON YARN - Google Patents

Description

The invention relates to the field of textile industry.

There are known devices for shaping random stumps on the same, consisting of a sensor of random pulses, a flow generator of random pulses, a control unit, an adjustment of the main drive, power supply units for an irregular machine.

The disadvantage of the existing devices is the occurrence of an unwanted, regularly repeating (moire) pattern on the fabric and the income of such a yarn into the fabric.

In order to create a 1 st strand with a random length (And the thickness of the thickening and the random interval between the thickenings, the impulse sensors of the proposed device are made in the form of radioactive radiation counters. At the same time, the output of each counter is connected to one of the inputs of the system "And, pa | A slant-modulated signal with an adjustable duty cycle frequency of the meter pulses is fed in. The outputs of the coincidence circuits are connected to the trigger input, which forms a sequence of right-angle random pulses with the case The output intervals of the trigger are connected to an amplifier operating in a key mode, covered by speed feedback, the load of which is an adjustable drive of the power supply or the output pair of the exhaust device Fig. 1 and 2 show the block diagrams of the proposed device; in Fig. 3 - his

schematic diagram.

The device consists of a block of forming a sequence of random voltage pulses (BFSI), a block of drive control (BUP) and an adjustable drive (I / 7),

Kinematically associated with the spinning machine exhaust device (VP) (Fig. 1). The block of forming a random sequence of pulses consists of a block for the formation of the onset of thickenings (BNU), a block of shaping for the end of the bulges (BUD), a block for forming the amplitude of the bulges (B / 4U).

At the output of the BNU p BKU, random sequences of pulses appear at random times.

For example, Lensi of a certain amplitude, for FITNESS and intensity, and incoming BUP input. The input voltage of this unit also receives a random voltage from a BAC.

The voltage at the output of a BAC is a stationary random function of time with a known and specified average anachevia. The amplitude of these impulses is proportional to the random amplitude of the voltage applied from the BOW. At the output of the drive control unit, a random sequence of rectangular pulses having a random duration, amplitude and the distance between them is formed. These pulses are fed to an adjustable drive consisting of an asihroin slip clutch and an amplifier that implements a pulse-by-pulse mode of the drive. The adjustable drive is kinematically coupled to the 1-tailing device (VP) of the spinning machine. In order to obtain high dynamic characteristics, the drive is oh; Vacant rigid feedback in terms of speed through tachogeneration coupled to the output shaft of the coupling. In the absence of a BUP output, the asynchronous slip clutch rotates at a speed that provides the nominal HOMeip yarn. In the event that a voltage pulse appears at the output of the control unit, the speed of the asynchronous slip clutch and, consequently, of the iterative cylinder of the exhaust device, increases in proportion to the width of this unit. Thus, , and yarn thickness repeats the voltage change at the output of the BUL. The detailed block diagram of the proposed device includes the GSI-, GSI-2 and GSI-3 generators of the slash stream of pulses, amplifiers-formers of UV pulses produced by random-flow generators, pulse intensity stabilization units (ASL), pulse intensity intensifiers (SPL), block converting the pulse sequence of pulses into a random voltage (ALL), a unit for shaping a random duration of pulses (VSD), a unit for forming a random amplitude and duration of a stream of pulses (5 SDL), latitude o-pulse modulator of pulses (PWM), gyupastey1, their VUV, amplifier pulse-width random sequence of pulses (U), asynchronous slip clutch (PMS), negative feedback rate (OOS) forming unit. The formation of three streams of random pulses, interconnected between them, is carried out by three counters: ionization of its radiation, operating on the face, causes the appearance of a voltage pulse on the resistances - Rs, connected at the output of the counter. The counters MF and SCS are used to form, respectively, and the end of the thickening, and the counter MF - to form the amplitude of the thickening. The goals of forming and ayurmatization of random imhulses consist of key amplifiers-formers UF1 - KFZ, 9KLYuchennyh output meters - Schz. Normalized impulses from the counters go to one of the inputs of the coincidence circuits BI - 83. BTQpoE INPUT of fallout circuits B) - Pulses come from the intensity stabilization circuits. The intensity stabilization schemes consist of integrating amplifiers (TI-TS, RsCi, RjCz, КЭСз triodes), latitude-im-imilion modulators, and, -, ° C °, sawtooth sources (straighteners D, Dz, chains, , C, RisCe), setting the average intensity of the pulses (constant voltage sources Ui - f / 3 and adjustable resistances - Ris) and the key schemes UV4 - UVB, from which the width-modulated sequence of pulses to the second input of the coincidence circuits BI - Vz . The intensity stabilization schemes express sequences of width-modulated pulses of a constant frequency, but with a duty cycle proportional to the difference between the current and a given intensity, which through the key amplifiers-formers UV4 - UV arrive the second inputs of the coincidence circuits BI - Burst. If the output of the UV4 – UV6 amplifiers is an order of magnitude higher than that of the intensity of the current sequences, then at the output of the coincidence circuits, streams of random impulses of constant intensity are formed. The formation of a stream of random pulses with a random frequency and duration is carried out with the help of a flip-flop Tr, to the inputs of which a random sequence of O- ™ pulses from the coincidence circuits B and Br are received. The pulses from these circuits form the beginning and the end of the pulses, respectively. Thus, the input of the amplifier T from the trigger Tp receives a sequence of pulses that have a random duration and duty cycle. The collector circuit of amplifier T is powered by an output voltage of an integrating magnetic amplifier (MU) that converts a random sequence of pulses coming from a coincidence circuit. Taking a continuous random voltage proportional to the intensity of the stream of random pulses generated by the counter SC. The control voltage taken from the amplifier πg is a sequence of emuls having a random amplitude, duration, and distance between pulses. This location is fed to the input of the power amplifier of the PA operating in the width-shift mode, the output of which includes the excitation winding of the asynchronous slip clutch RH, which drives the power supply and the exhaust cilidry of the spinner of the spinning machine.

The latitude-pulsed mode of the drive is carried out by means of a latitude-pulse modulator, co6tpaHHoro at the input of the PA and consisting of an OV source (D4, RZJ, Cs) and a setting unit (R26). The duty cycle of pulses in the excitation winding of an asynchronous slip clutch is proportional to the difference between the setpoint voltage and the current voltage taken from the amplifier T, the feedback voltage generated by the 7G generator, kinematically connected to the output shaft of the coupling and sawtooth voltage .

Thus, the speed of the power supply or exhaust pair of the spinning machine, and hence the amount of exhaust, varies in proportion to the amplitude and duty cycle of a sequence of random pulses.

The subject of the invention 1. A device for forming random thickenings on a yarn, consisting of a random inoculum sensor, a former and random pulses, a control unit, a regulable drive, power cords of a spinning machine of a spinning machine, pulses with a random length and a thickness of the bulge and a random interval between the bulges, pulse sensors are made

in the form of radioactive radiation meters, with the output of each meter being connected to one of the inputs of the AND circuit, the other input of which is connected to a source of a width-modulated signal with an adjustable

the pulse frequency ratio of the counter, and the outputs of the coincidence circuits are connected to the trigger input, which forms a sequence of rectangular pulses of random duration with random intervals between pulses, the trigger output being connected to a key-driven amplifier feedback-controlled speed, which is adjustable power drive

or exhaust pair exhaust.

2. The device according to claim 1, characterized in that, in order to generate pulses of random duration with random intervals between pulses and random adshlitu, the collector circuit of the amplifier of signals from a trigger is connected to a third source of random pulses through an integrating magnetic amplifier.