SU1278367A1 - Apparatus for measuring twist of roving - Google Patents

Abstract

The invention makes it possible to increase the accuracy of measurements of the roving twist by determining the moment of complete parallelization. The segment of Equip 3, installed in clamps x 1 and 2, is spun with the help of actuator 4, the sensor 4 turns of the rotating clamp 2 causes the pulses to pass through the open key 9 and the element OR 11 to the counter 12. As rotate 3 is unwound its cross section changes from round to elliptical. At a certain point in time, the amplitude of the signal from sensor 5, which perceives the cross section of the roving cross section, will exceed the trigger level of trigger 6. At the output of trigger 6, the tc in pulses is equal to twice the frequency of the rotating clamp 2. The first pulse will switch trigger 8, which will open the key 9 As a result, the pulses from the sensor 10 are not received on the accounts of S chik 12. The counter will receive pulses from trigger 6, which are passed through divider 7 and the element OR 11. At a certain moment, the last pulse arrives at counter 12 and measurement ends. Using the former 13, the counter 12 is zeroed, and the trigger 8 is set to 1ND 1 to its original state. In clamps 1 and 2, a new segment 00 CA9 of roving is installed and the measurement process is repeated. 2 Il. O) j

Description

I 1

The invention relates to the textile industry and is intended to measure the twist of a roving.

The purpose of the invention is to improve the accuracy of measuring the twist of a roving by determining the moment of complete parallelization. I

Fig, 1 shows a structural

The diagram of the device, in FIG. 2, is a diagram of the operating voltages.

The device contains a fixed 1 and 2 rotating clamps, into which the ends of a roving 3 are installed. The rotating clamp 2 is rigidly connected to the drive shaft A. A transducer of the form 5 is cross-sectional of a roving through a Schmntt trigger 6 and a pulse trigger at the first input 8 ban. Trigger output

8 is connected to the control input of the key 9, the second input of which is connected to the output of the rotational clamp 10 rotation sensor, and the output is connected to the first input of the OR 11 element. The second input of the OR 11 element is connected to the output of the pulse frequency divider 7, and the output is connected to the input of the counter 12 torsion numbers. The reset shaper 13 is connected via a reset channel to a counter 12 and a second: an inhibition trigger 8 input.

The device works as follows.

The length of the roving 3 is set to 1 and 2. During the unwinding of the roving, due to the B1 of the drive 4, the sensor 10 turns of the rotating clip 2 pulses I (Fig. 2a) corresponding to the number of revolutions of the rotating clip. These pulses pass through the public key.

9, and the OR 11 element on the counter 12, which registers the number of revolutions of the clamp 2. As the roving is unwound, its cross section changes from round to elliptical.

At some point in time, the amplitude of the signal (Fig. 2S) from sensor 5, which perceives the dimensions of the cross section of Rove 3, exceeds the trigger level of the 6 Schmitter trigger, at the output of which pulses (Fig. 2b) appear, equal to twice the frequency of the rotating clip 2. The front of the first pulse switches the prohibition trigger 8, which closes the key 9, and the pulses from the sensor 10 turns of the rotating

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the clamp does not arrive at the counter 12. From the moment of rotation, the counter 12 receives pulses (fig. 2g) from the Schmitt trigger 6, which have passed through frequency divide 7 and the element OR 11.

The divider 7 divides the pulse frequency by 4. The division factor is explained as follows. From the moment t (exceeding 10 the trigger level of the trigger 6 by the signal from the sensor 5) to the instant t (the signal ceases from the trigger 6), the difference passes the moment of the full parallelization of the fibers. And this:. 15 moment is located symmetrically in the interval t t. Therefore, the number of torsions from the moment t to the moment of parallelization corresponds to half the number of pulses from the trigger 6

20 (Fig. 2b). Each turn of clamp 2 causes the appearance of two pulses on trigger b every 180 ° of the angle of rotation of the roving (Fig. 25, the signal has twice the frequency 2f),

25 Thus, the number of revolutions of the clamp 2 during the time t t is equal to the fourth part of the number of pulses from the trigger 6 in the interval t t.

After complete unwinding, level 3 begins to twist with the opposite direction of the turns. At time t, counter 12 receives the final pulse. The measurement of the number of twists ends, and the counter 12.

, g records the result of measuring the twist of a piece of level. Subsequently, with the aid of the reset shaper 13, the counter 12 is nullified, and the inhibitor trigger 8 is set to the initial state, clamps 1 and 2 establish a new section of the roving, and the measurement process is repeated.

As a cross-sectional shape sensor 5, it is advisable to use a shadow type photoelectric sensor. In this case, the width of the photocell window must be greater than the maximum diameter of the roving.

50

Claims (2)

I The invention relates to the textile industry and is intended to measure the twist of a roving. The purpose of the invention is to improve the accuracy of measuring the twist of a roving by determining the moment of complete parallelization. I FIG. 1 shows a block diagram of the device; FIG. 2 shows diagrams of operating voltages. The device contains a fixed 1 and 2 rotating clamps, into which the ends of a roving 3 are installed. The rotating clamp 2 is rigidly connected to the drive shaft A. A sensor 5 of the cross section of the roving is connected to a pulse frequency divider 7 and to the first input trigger 8 ban. The trigger output 8 is connected to the control input of the key 9, the second input of which is connected to the output of the rotational clamp 10 speed sensor, and the output is connected to the first input of the OR 11 element. The second input of the OR 11 element is connected to the output of the pulse frequency divider 7, and the output is connected to the counter input 12 numbers of torsions. The reset shaper 13 is connected via a reset channel to a counter 12 and a second: an inhibition trigger 8 input. The device works as follows. The length of the roving 3 is set to 1 and 2. During the unwinding of the roving, due to the B1 of the drive 4, the sensor 10 turns of the rotating clip 2 generates pulses (Fig. 2a) corresponding to the number of revolutions of the rotating clip. These pulses pass through the public key 9 and the element OR 11 to the counter 12, which registers the number of revolutions of the clamp 2. As the roving unwinds, its cross section changes from circular to elliptical. At some point in time, the amplitude of the signal (Fig. 2S) from sensor 5, which perceives the dimensions of the cross section of Rove 3, exceeds the trigger level of the 6 Schmitter trigger, at the output of which pulses (Fig. 2b) appear, equal to twice the frequency of the rotating clip 2. The front of the first pulse switches the prohibition trigger 8, which closes the key 9. At the same time, the pulses from the 10 turn sensor of the rotating 672 clamp do not enter the counter 12. From the moment of rotation, the counter 12 receives pulses (Fig. 2d) from the Schmitt trigger 6 that have passed through the frequency divider 7 and the element OR 11. The divider 7 divides the pulse frequency by 4. The division factor is explained next. From the moment t (if the signal from the sensor 5 exceeds the trigger level of the trigger 6) to the moment t (the signal stops the trigger 6), the difference passes the full parallelization of the fibers. And this:. The moment is located symmetrically in the interval t t. Consequently, the number of torsions from the moment t to the moment of parallelization corresponds to half the number of pulses from trigger 6 (Fig. 2b). Each turn of clamp 2 causes the appearance of two pulses on trigger b every 180 ° of the angle of rotation of the roving (Fig. 25, the signal has twice the frequency 2f). Thus, the number of revolutions of clamp 2 during the time tt is equal to one fourth of the number of pulses from trigger 6 interval tt. After fully unwinding, the roving 3 begins to twist with the opposite direction of the turns. At time t, counter 12 receives the final pulse. The measurement of the number of twists ends, and the counter 12. captures the result of measuring the twist of a segment of a roving. Subsequently, with the aid of the reset shaper 13, the counter 12 is nullified, and the inhibit trigger 8 is reset, B clamps 1 and 2 establish a new section of the rack, and the measurement process is repeated. As the sensor 5 of the cross-sectional shape, it is advisable to use a photoelectric sensor of the shadow type. In this case, the width of the photocell window must be greater than the maximum diameter of the roving. An apparatus for measuring rotate twist, comprising a rotating clip associated with a drive, a fixed clamp, a rotating clip rotation sensor, a torsional count counter connected by a first input to a reset driver, in order to improve the measurement accuracy by determining the total torque parallelization, a roving cross section form sensor, a Schmitt trigger, a frequency divider, an OR element, a key and a ban trigger, and a cross section cross section sensor to the Schmitt trigger, whose epdsod is connected to the frequency divider and the first input of the inhibit trigger, the output of which is connected to the control input of the key, the rotational speed sensor of the rotating clamp through the key and the element OR connected to the output of the frequency divider and the second input of the torsional number counter, the first input of which is connected to the second entry of the ban trigger. I I I I I I I I I I I I ii {rig.2