JP2002020038A - Control device for thread tension and length - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device for thread tension and length that can control tension accurately and can offer remote control with communication in opposite directions. SOLUTION: The control device for thread tension and length comprises a sensor 10 for detecting tension by means of a strain gauge, an amplifying means 20 for amplifying the output of the sensor, a measuring means for measuring a pulsed thread length with a phase change by inducing magnetization by rotation according to the operation of a comparator on the output signal frequency-divided according to a phase difference among three phases of a motor, a display means for displaying an operating condition on a screen, an actuator means 90 for maintaining the thread tension by means of a small brushless motor using an oilless metal bearing, a thread cutting means 110, a communication means 120 for transmitting a change in the measured tension and the operating condition to a central system according to communication protocol to store the data, and a control means for outputting a control signal for keeping the tension constant according to the tension change.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for controlling the tension and length of a yarn, and more particularly, to detecting a tension directly by using a tension sensor and controlling the tension to accurately control the tension. Oil-free metal bearings (Oilless Metallic Be
small brush squirrel motor (b)
The present invention relates to a yarn tension and length control device that can extend the life of the device by using a rushless motor and can be remotely controlled using two-way communication.

[0002]

2. Description of the Related Art Generally, weaving equipment for weaving woven fabrics includes:
A twisting machine for twisting a yarn, and a winder (twisting preparation machine) for winding to prepare a twisting process by the twisting machine
Is included.

In the winder, a tension controller using the elastic force of a spring is attached to a roll to serve to maintain the tension of the yarn at a constant level. When the thread has a predetermined length, it also serves to cut the thread. At this time, if the tension of the yarn is not constant, the actual lengths of the yarns hooked on the respective shafts are all different, so that after the final operation, the remaining yarn (remaining yarn) is wasted. The role of the tension controller is very important.

A conventional tension controller uses a method in which the speed of a yarn (yarn speed) is sensed and the yarn speed is kept constant by using the elastic force of a spring to maintain the tension constant.

However, the conventional tension controller controls the tension by sensing the yarn speed and keeping the yarn speed constant, instead of sensing the tension, so that it is difficult to control the tension accurately. There is.

Further, the conventional tension controller is mechanically designed to maintain the tension of the yarn by making the crossing angle of the yarn different by using the elastic force of the spring. In order to perform the direct measurement, a measuring instrument must be added. For example, even if a tension measuring instrument is newly added, there is a problem that a deviation of the tension due to the added tension measuring instrument occurs.

Further, since the conventional tension controller uses a motor using a ball bearing as a motor for controlling the movement of the yarn, abrasion heat is generated in a process corresponding to a high-speed speed change, so that the life is relatively shortened. There is a problem of shortening.

Further, since the conventional tension controller can only be set by one-way communication, there is a problem that device diagnosis cannot be performed.

[0009] Despite these many problems,
Since an effective and appropriate device for solving the above problem has not been developed, it is urgently necessary to develop a device for overcoming this problem.

[0010]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to directly detect a tension by using a tension sensor. By controlling the tension, the tension can be precisely controlled, and the oil-free metal bearing (Oi
small brush squirrel motor (brussless motor)
It is an object of the present invention to provide a yarn tension and length control device which can extend the life by using a motor and can be remotely controlled using two-way communication.

Another object of the present invention is to provide a buffering function for the yarn when the motor is controlled to maintain the yarn tension change by crossing the yarn to the front end pre-tenser of the rotating pulley. It is an object of the present invention to provide a yarn tension and length control device which performs the above operation and has a proper spring elasticity so that excessive tension is not approved.

[0012]

In order to achieve the above object, a yarn tension and length control device according to the present invention comprises: a sensor means for detecting a tension at a final end by using a strain gauge; Amplifying means for amplifying the output of the sensor means and an output signal divided by the phase difference of the three phases of the motor are compared by a comparator to induce magnetization by rotation, so as to follow the phase change. Measuring means for measuring the length of the yarn output and measured in pulses, display means for displaying the operating state on the screen, and yarn using a small brush squirrel motor using oil-free metal bearings Actuator means for maintaining the tension at the required tension, cutting means for cutting the thread, and the change in tension measured by the communication protocol. A communication unit for storing the article by transmitting the work status in the center Shisutemu, comprising encompass and control means for outputting a control signal for maintaining the tension constant with the variation of the tension.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
I will explain in more detail.

As shown in FIGS. 1 to 5, the configuration of the yarn tension and length control device according to the embodiment of the present invention is as follows.
A sensor unit 10 for detecting the tension at the final end, and an amplifying unit 20 for amplifying the output of the sensor unit 10
And a key input unit 30 for allowing a user to input commands and data, and a comparator comparing output signals divided by the phase difference of the three phases of the motor to induce magnetization by rotation, thereby obtaining a phase. And a display drive unit 5 for operating the screen display device 60 for measuring the length of the yarn output and measured in pulses according to the change in
0 and a screen display device 60 for displaying the operation state on the screen
And an input PWM signal for output PWM of 100 kHz or more
A dedicated control comparator 70 for driving a motor installed at the front end of a sensor that controls the yarn speed by synthesizing it with a signal and transmitting it to the actuator 90;
An amplifier 80 for amplifying the output of 0, an actuator 90 for maintaining the tension of the yarn at a required tension, a cutting driving unit 100 for operating the cutting unit 110, and a cutting of the yarn. A cutting unit 110 for setting a value and detecting a state according to a two-way communication protocol of the system so that a change in the tension of the winder can be automatically measured. And a central processing unit 130 that calculates a control amount based on a change in tension, converts the control amount into a PWM signal, and outputs the PWM signal. It becomes.

The operation of the tension and yarn length control device according to the embodiment of the present invention having the above-described structure is as follows.

After the actual tension is detected by the sensor unit 10 using a strain gauge and then converted into an electrical signal and output,
The amplifying unit 20 amplifies the output signal of the sensor unit 10 and outputs the amplified signal to the central processing unit 130.

As shown in FIG. 8, the sensor unit 10 has a structure in which a strain gauge 16 is provided on both sides of a leaf spring 15, and when a change in the tension of the yarn occurs, the pressure of the yarn is applied. Plate spring 15 generates displacement, which causes the strain gauge 1
The current output from 6 is changed to detect the thread tension. That is, the sensor unit 10 uses the leaf spring 15 and the strain gauge 16 which can detect a minute displacement of the force applied by the yarn, thereby changing the tension generated by the minute change in the yarn speed. Is detected directly.

As shown in FIG. 9, the strain gauge 16 is in the form of a circuit with two reference resistors 14 and a bridge, and is generally a road sail using four strain gauges. Instead of using the (Load Cell) method, a small displacement can be sensed by using a method connected in the form of a bridge using two strain gauges, and the maximum delay time falls within 20 μsec. Have a quick response.

In the amplifying section 20, the sensor section 1
A change in the tension detected from 0 is converted to an analog / digital converter (Analog to Digital Conve).
After the digitalization through the ter (rter), this is amplified and output so that the central processing unit 130 recognizes it as a tension value.

As described above, the sensor unit 10 and the amplifying unit 2
As shown in FIG. 10, in the signal input to the central processing unit 130 via 0, the vibration generated from the operation of the weaving machine is input at least three times as much as the change in the tension. For this reason, the central processing unit 130 employs software-like technology to detect a normal tension signal from a noise signal generated by vibration of the machine, and uses a median Fitter method (Median F).
By removing noise by using an ilter method, only a normal tension signal as shown in FIG. 11 can be selectively used. The central processing unit 130 uses a dedicated process that is operated at a high-frequency PWM frequency of the order of 100 KHz and operates at a high speed of 30 KHz.
Make the reaction within μsec.

When the tension is measured and sensed, the central processing unit 130 calculates the deviation between the set tension value and the measured tension value, and requests the operation of the motor of the actuator 90 through an arithmetic operation. By inducing such a movement, a change in the rotational force of the motor induces a torque that causes the tension of the yarn to change.

The motor is as shown in FIG.
A pulley 97 is connected to a motor shaft 91 that is rotated by a rotational force generated by a phase change of a magnetic force between the coil and the magnet, and a three-phase induction motor that is rotated together is used. Since the thread is wound and passed, the central processing unit 130 maintains or changes the tension of the thread passing through the pulley 97 by changing the rotational force of the motor.

As described above, the three-phase induction electric motor used to maintain the tension is a brush squirrel (Bru).
In this case, when the motor is used for a long time, the oil-free metal can be used without using a pole bearing so that the life can be extended in response to a high speed change. Bearing (Oi
By processing the less metallic bearing (92) and the motor shaft 91 to maintain an error of ± 3 × 10 ^[−6] meter, it is possible to prevent shortening of the life due to generation of heat and generation of heat due to a change in motor torque. To limit the PP current through the release of heat due to regeneration and the limitation of overload. The driving shaft 91 is driven into the pulley 97 by 10-40 kg.
Control to within 3 microns crossing for force injection by weight.

According to the present invention, apart from the conventional method of controlling the tension using the elastic force of the spring, the pulley 9 is used for transferring the yarn.
7, by applying a change in the inertial force of the rotation of the pulley 97 by the motor by means of the motor, and by appropriately adjusting the tension measured after the rotation of the motor and the rotation force of the motor, to maintain a constant value. To maintain the tension. That is, the central processing unit 130 adjusts the balance between the rotational force of the motor and the measured value of the sensor unit 10 to maintain the tension so as to match the set tension, and matches the adjusted balance value. In this way, the rotational force of the motor is changed.

As described above, by controlling the tension using the pulley 97, in the present invention, the pretensor (Pre) that crosses the yarn path twice or more so as to buffer the change in the yarn length due to the change in the tension. -Tenser) 95 is additionally installed. A leaf spring causes the arm (Arm) of the pretensor 95 to buffer the yarn with a constant force, thereby providing the displacement needed to maintain the changed tension on the input side by the motor. Thus, the pretensor 95 ensures that the yarn and the pulley 97 do not run idle on the surface of the pulley 97 and that a constant frictional force is maintained.

Also, in order to reduce the error of the length of the yarn caused by the slippage between the yarn and the pulley 97, the surface of the pulley 97 is subjected to a sending process and an oxide film for strengthening the surface of aluminum. After processing, DLC (Diamond Like Carbo)
The deposition of n) improves the problem that the life is shortened due to surface friction. Further, in order to reduce the response delay due to the rotational inertia, aluminum is processed to a thickness of 3 mm or less, and an oxide film is processed and DL is processed.
In order to prevent deformation even in the deposition of C, low-temperature deposition of 200 ° C. or less is applied for processing.

In the central processing unit 130, the yarn is cut into a predetermined length by measuring the length of the yarn and operating the cutting unit 110 via the cutting drive unit 100. As a method of measuring the height, an output pulse output by the phase displacement of the motor is used. That is, the central processing unit 130 uses the output pulse output by the phase displacement of the motor to generate the motor shaft 91.
The length of the yarn is measured by detecting the number of rotations of the pulley 97 connected to the pulley, and in this case, an inverter generally used to drive a three-phase induction motor is used. Apply the phase control method.

Further, the central processing unit 130 controls the motor to brake and cut the yarn so as to prevent the yarn from becoming entangled due to the free rotation due to the rotational inertia which is a problem at the end of the operation.

In the cutting section 110, an operation for cutting the yarn is performed by fixing the transfer ceramic guide 111 and fixing the cutting thread blade 112 to the guide 111. In the process of cutting the yarn, the central processing unit 130 brakes the motor attached to the front end of the sensor to stably cut the yarn, thereby bobbin bobbin.
(bbin) and the tension maintaining motor is maintained at a large tension, so that the yarn is cut, and the braking of the motor stops the continuous operation of the pulley 97 to prevent the yarn from being wound around the pulley 97. I do.

The central processing unit 130 uses the communication converter 120 to enable automatic setting management and operation according to an automatic recognition communication protocol so that it can be connected and disconnected during operation. In the past, it was only possible to set by one-way communication, but in the present invention, the state of each node is read or stored weekly through two-way communication and commanded,
Two-way communication is used so that the status can be checked and the device can be automatically diagnosed and the status recognized.

The central processing unit 130 allows a user to input or control data through the key input unit 30, and outputs a result generated during operation to the screen display 60 through the display driving unit 50. This allows the user to confirm this.

According to the present invention, the DC-DC converter can supply +5 V, +12 V and +24 V with only a single external power supply.
Power supply. Also, by suppressing the current loss, the maximum current does not exceed 1A.

Further, a frame capable of fixing parts and the like in a case is manufactured and assembled in order to eliminate a malfunction of the sensor due to minute vibration. In addition, in order to block malfunctioning equipment and harmful radio waves due to electromagnetic waves,
A mixture of BS resin and antistatic liquid is used, and a special paint is mixed to maintain the strength of the plastic.

Although the present invention has been described with reference to the above embodiments, the present invention is not limited to these embodiments, and various modifications may be made without departing from the scope and spirit of the present invention.

[0035]

As described above, according to the embodiment of the present invention, the change in the tension generated by the change in the yarn speed is detected by the sensor, and the tension is adjusted in response to the detected change in the tension. In this way, it is possible to fundamentally block problems caused by externally approved points of change in tension, so that high-quality fibers can be produced.

Further, according to the embodiment of the present invention, the entire tension can be managed by remote control, and the work tension in each work process can be detected and controlled by the central system. There is an effect that the quality of production can be controlled by maintaining, managing and supervising the tension.

Further, according to the embodiment of the present invention, it is possible to perform the operation with the standardized tension, and it is possible to accurately perform the tension and the application operation management corresponding to the characteristics of the fiber.

According to the embodiment of the present invention, a minute change in tension, which cannot be controlled by a machine, is measured, and a small high-power motor is controlled to stabilize the minute tension. This maintains a stable tension in response to a change in tension on the input side, and the microprocessor (mi)
It is possible to control the tension by controlling the tension by the cro process, and to transmit the measured tension and yarn speed to the system for storage and maintenance.

Further, according to the embodiment of the present invention, it is possible to prevent a bad work by controlling and managing a setting and a work state through a network, and it is possible to connect an additional application program and the like. Possible,
There is an effect that the central system can control and manage.

Further, according to the embodiment of the present invention, it is possible to process a unique fiber in which the tension is continuously changed by applying the deformation of the tension by applying an arbitrary tension pattern. There is an effect that can be done.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a yarn tension and length control device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a yarn tension and length control device according to an embodiment of the present invention.

FIG. 3 is a plan view of a yarn tension and length control device according to an embodiment of the present invention.

FIG. 4 is a side view of a yarn tension and length control device according to an embodiment of the present invention.

FIG. 5 is a main part configuration diagram of a yarn tension and length control device according to an embodiment of the present invention.

FIG. 6 is a configuration diagram of a guide of a yarn tension and length control device according to an embodiment of the present invention.

FIG. 7 is a sectional view of a pulley and a motor of a yarn tension and length control device according to an embodiment of the present invention.

FIG. 8 is a configuration diagram of a sensor unit of a yarn tension and length control device according to an embodiment of the present invention.

FIG. 9 is a layout diagram of a strain gage of a yarn tension and length control device according to an embodiment of the present invention.

FIG. 10 is a waveform diagram of a signal input to a central processing unit of a yarn tension and length control device according to an embodiment of the present invention.

FIG. 11 is a waveform diagram of a signal filtered by a central processing unit of a yarn tension and length control device according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Sensor part 20 Amplification part 30 Key input part 40 Electrical angle part 50 Display drive part 60 Screen display 70 Dedicated control comparator 80 Amplifier 90 Actuator 100 Cutting drive part 110 Disconnect part 120 Communication converter 130 Central processing unit

Claims (6)

[Claims] 1. A sensor for detecting a tension at a final end using a strain gauge, an amplifier for amplifying an output of the sensor, and a frequency divided by a phase difference of three phases of a motor. The output signals are compared by a comparator to induce magnetization by rotation,
Measuring means for measuring the length of the yarn output and measured in pulses along the phase change, display means for displaying the operating state on the screen, and a small brush squirrel using oil-free metal bearings Actuator means for maintaining the thread tension at the required tension using a motor, cutting means for cutting the thread, and a central system for monitoring the change in tension and working conditions measured by the communication protocol. And a control means for outputting a control signal for maintaining the tension constant according to the amount of change in the tension. And length control device. 2. The small-sized brush squirrel motor includes an oil-free metal bearing (Oiles Metallic B).
earing) and the motor shaft 91 is ± 3 × 10 ^[-6]
2. The yarn tension and length control device according to claim 1, wherein the yarn is processed so as to maintain a meter error. 3. The small brush squirrel motor is provided with a sending (Se) on the surface of the pulley in order to reduce a length error of the yarn caused by a slip between the yarn and the pulley.
After performing an oxide film treatment for strengthening the surface of the aluminum together with the NDC treatment, the DLC (Diamond)
The yarn tension and length control device according to claim 1, wherein vapor deposition of (Like Carbon) is performed. 4. The yarn tension and length control device according to claim 1, wherein two strain gauges are used to form a ridge with two reference resistors in terms of a circuit. 5. The control device according to claim 1, wherein the control means controls the cutting of the yarn together with the braking of the motor so as to prevent the yarn from becoming entangled due to free rotation due to the rotational inertia of the motor, which is a problem at the end of the operation. The yarn tension and length control device according to claim 1. 6. The communication means reads or stores the status of each node on a weekly basis through two-way communication so that the status can be confirmed, and the status can be confirmed, and diagnosis and recognition can be automatically performed. The yarn tension and length control device according to claim 1, characterized in that: