SU794537A2 - Device for measuring single filament linear speed pulsations - Google Patents

Description

The invention relates to the measurement of motion parameters, is intended to measure the speed of the thread in the technological processes of the textile industry.

A device [1] is known for measuring 5 pulsations of the linear speed of a single thread in the technological processes of spinning and weaving according to ed. St. No. 547695, consisting of an average speed meter, a pulsation value estimator, a pulse width meter 10, and a speed deviation sign determination unit.

Such a device does not allow to establish the value of the linear speed of the thread at the moment of its break, which is necessary for determining the limiting speeds of rewinding the threads during the design and development of various automatic devices for technological control of the thread (yarn).

The aim of the additional invention is to expand the functionality of the device by measuring the linear speed of the thread at the time of its breakage while increasing the speed and accuracy of measurements. 25

This is achieved by the fact that the device for measuring the ripple of the linear speed of a single thread according to ed. St. No. 547695 an integrator and two keys are additionally introduced. In this case, the control inputs of the key are connected through the integrator to the sensor of the first channel of the medium speed meter, the signal input of one of the keys is connected to the output of the time relay, and the output of the key is connected to the input of the prohibition trigger, counter and keys of the sign display unit, the signal input of the second key connected to the second output of the adjustable delay unit, and the key output is connected to the average speed indicator, and the regulatory input of the adjustable delay unit is connected to the output of the integrator of the average speed meter.

The drawing shows a structural diagram of the described device.

The sensor 1, the first in the direction of the thread, through the pulse former 2 and the adjustable delay unit 3 is connected to one of the inputs of the matching circuit 4, as well as to the pulse expander 5 and the matching circuit 6. Sensor 7 is connected via the pulse former 8 to the second input of the matching circuit 4, with an expander 9 and a matching circuit 10. To the output of the matching circuit 4, a coincidence indicator 12 is connected through the integrator 11. In this case, the output of the integrator And is connected to the regulatory input of the adjustable delay unit

3. The output of the pulsation value estimator, consisting of expanders 5 and 9, outputs associated with the coincidence circuit 13, is connected to a pulse shaper 14, which is connected via one channel to the input of the trigger 15, and through the other channel, through the inhibit trigger 16, the shaper 17 - with the second input of the trigger 15. To the output of the trigger 15 is connected a time relay 18 through the shaper 19. The key 20 communicates with the reference pulse generator 21 with the counter 22 and the pulsation value indicator 23. The outputs of the matching circuits 6 and 10 are connected to the indicators through the keys 24 and 25 sign 26 and 27. The average speed indicator 28 through the key 29 is connected to the adjustable delay unit 3.

The output of the integrator 30 connected to the sensor 1 is connected to the control input of the keys 29 and 31, and the output of the key 31 is connected to the counter 22, the inhibition trigger 16 and the keys 24, 25.

The device operates as follows.

The signals from sensors 1 and 7, perceiving irregularities of the thread, are fed through pulse shapers 2 and 8 to coincidence circuit 4, the pulsation unit for estimating the value of the ripple and to the unit for determining the sign of the speed deviation, and the signal from the first in the direction of movement of the sensor 1 is delayed in the adjustable unit delays 3. In the unit for estimating the magnitude of the pulsation, an impulse is formed, the duration of which is proportional to the magnitude of the pulsations of the speed, is determined by the pulse duration meter, consisting of formers 14, 17, 19, triggers 15, 17, k yucha 20, generator 21, counter 22, time relay 18 and ripple value indicator 20. In the speed deviation sign determination unit, consisting of coincidence schemes 6, 10, keys 24, 25 and sign indicators 26, 27, the sign of speed deviation relative to the average is determined values. The frequency of change of readings is determined by the parameters of the time relay.

When the thread breaks at the input of the integrator 30, the signal disappears, and a control signal is supplied to the control inputs of the keys 29 and 31. The keys 29 and 31 interrupt the connection of the indicators of the mean velocity value 28 and the ripple value 23 with the measurement units. The indicators 23 and 28 fix the values of the linear speed of the thread at the time of its break.

With an increase in the ripple of the linear speed of the thread, a quick manual adjustment of the delay time of the sensor signal, carried out in the adjustable delay unit, is impossible, which leads to the loss of some information and to an increase in the measurement error. Using the connection between the integrator 11 and the adjustable delay unit 3 allows you to automatically monitor low-frequency changes in linear speed, which improves the speed and accuracy of the measurement result.

Using the invention allows to increase the accuracy of measurement, as well as to determine the speed of the thread at the time of its break, which is necessary to determine the speed of technological modes.

Claims (1)

by matches associated with coincidence circuit 13, connected to pulse generator 14, which is connected to trigger input 15 through one channel, through inhibit trigger 16 through another channel, driver 17 to second trigger input 15. A time relay is connected to trigger output 15 18 through the driver 19. The key 20 communicates the generator of the reference pulses 21 with the counter 22 and the ripple magnitude indicator 23. The outputs of the coincidence circuits 6 and 10 through the keys 24 and 25 are connected to the indicators 26 and 27. The indicator of the average speed 28 through the key 29 connected to the regulator a delayed delay 3. The output of the integrator 30 connected to the sensor 1 is connected to the control input of the keys 29 and 31, and the output of the key 31 is connected to the counter 22, the prohibition trigger 16 and the keys 24, 25. The device works as follows. The signals from sensors 1 and 7, which detect the irregularities of nitnes, are fed through pulse formers 2 and 8 to the coincidence circuit 4, to the pulsation estimation unit and to the speed deviation sign determining unit, and the signal from the sensor 1 in the direction of movement of the thread 1 is delayed in the adjustable block delays 3. In the pulsation estimation unit, a pulse is formed, the duration of which, proportional to the magnitude of the velocity pulsations, is determined by a pulse width meter consisting of drivers 14, 17, 19, triggers 15, 17, key 20, generator 21, counter 22, time relay 18, and ripple magnitude indicator 20. In the sign of determining the speed deviation sign, consisting of coincidence schemes 6, 10, keys 24, 25, and indicators 26, 27, the sign speed deviations relative to mean value. The frequency of changing indications is determined by the parameters of the time relay. When the thread is broken at the input of the integrator 30, the signal disappears, and a locking signal is applied to the control inputs of the keys 29 and 31. The keys 29 and 31 interrupt the connection of the indicators of the value of the average speed 28 and the value of the ripple 23 with the measuring blocks 794537. Indicators 23 and 28 record the linear speed of the thread at the moment it breaks. With an increase in the ripple magnitude of the linear speed of the thread, the manual re-tuning of the delay time of the sensor signal carried out in the adjustable delay block is impossible, which leads to the loss of a part of information and an increase in the measurement error. The use of communication between the integrator 11 and the adjustable delay unit 3 allows one to automatically monitor the low-frequency variations of the linear velocity, which improves the speed and accuracy of the measurement result. The use of the invention allows to increase the measurement accuracy, as well as to determine the speed of movement of the thread at the time of its breaking, which is necessary to determine the speed of technological modes. The invention The device for measuring the pulsation of the linear velocity of a single thread according to the author. St. No. 547965, which is distinguished by the fact that, in order to measure the linear speed of the thread at the moment of its breaking, as well as to increase speed and accuracy of measurement, an integrator and two keys are added to it, while the control inputs of the keys are connected through the integrator with the sensor the channel of the average speed meter, the signal input of one of the keys is connected to the time relay output, and the key output is connected to the prohibition trigger input, the counter and keys of the sign indication unit, the signal input of the second key is connected to the second output of the controller Rui delays, and key output is connected to the indicator medium speed, and adjusting the adjustable delay unit input coupled to the output of the integrator meter medium speed. Sources of information taken into account in the examination 1. USSR author's certificate 547695, cl. G 01 P 15/10, 1977 (prototype).