KR101133735B1 - Cable-Length And Line Speed Measuring Apparatus Using Laser beam - Google Patents

Abstract

The present invention is to measure the length of the wire by using a laser sensor to automate the measurement work process to facilitate the work and to improve the labor productivity through accurate length measurement, to form a measuring space therein and A case in which inlet and outlet holes are formed in communication with both sides of the measurement space, respectively, a light emitting sensor installed at an upper end of the measurement space inside the case to emit a laser beam, and spaced apart at the tip side of the light emitting sensor. A collimating lens for focusing the emitted laser beam, a beam splitter installed at intervals on the collimating lens to divert the focused laser beam downward, and a wire rod receiving and moving a laser beam at an upper end of the beam splitter. A sensor unit having a light receiving sensor for sensing, and installed in an upper surface of the case and entering a measurement space An output display unit for numerically displaying the length and the moving speed of the wire rod from the sensor unit which detected the ash, and measuring and calculating the length and the moving speed of the wire rod moved to the sensed data by controlling the sensor unit and calculating the calculated result with the output display unit. Provided is a measuring device for length and flux of a moving wire using a laser beam including a control unit for transmitting.

Description

Cable-Length And Line Speed Measuring Apparatus Using Laser beam}

The present invention relates to an apparatus for measuring the length and speed of a moving wire using a laser beam, and more particularly, by measuring a length of a wire, such as an electric wire, by installing a sensor and automating the measurement work to continuously and uniformly measure the same. The present invention relates to an apparatus for measuring the length and flux of a moving wire using a laser beam that is easy to work and has improved length measurement accuracy.

In general, in producing wire rods such as wires, films, and paper, the accurate measurement of the production length (measurement) is a very important process technology for producing wires in order quantity.

In addition, current ship speed is an important control factor that is referred to in the interlocking control between production facilities, and it is necessary to accurately measure it as data that can predict the production time.However, in the case of the conventional measuring method using a rotary encoder or a belt, contact wear and If slip occurs on the contact surface, measurement error occurs, which causes a difference from the actual production length.

And as a technique for measuring the length of the wire rod using a conventional sensor is disclosed in the Republic of Korea Patent Application Publication No. 10-2009-0007892 bar Looking at its configuration 『Measure the length of the drawn line through the sensor of the measuring pipe to the numerical value A lead line length measuring device configured to display the length of the reference point and the lead line by a sensor unit for irradiating a laser beam to a line introduced into the measuring pipe to optically display a reference point and to sense a moving position of the reference point. Is calculated and displayed as a numerical value on the liquid crystal display window.

However, the leader line length measuring device is a method of irradiating a laser beam to an incoming wire rod and displaying a reference point on the surface of the wire rod, and then detecting the trace by a sensor located at a time point and tracking the trace on the moving wire rod by subdivided sections. There was a problem that an error in measurement due to a tracking error occurs.

In addition, the length can be measured only in a certain direction, when the wire rod is past the length to be measured while moving, there is a problem that the material loss occurs as the error of the measurement is further increased and reworked.

The present invention is to solve the above problems, the work process for measuring the length of the wire rod is not only quick and easy, but also to reduce the material loss by measuring the exact length, it is possible to increase labor productivity by automation of the measurement work process It is an object of the present invention to provide an apparatus for measuring the length and flux of a moving wire using a laser beam.

A case in which a measurement space is formed therein and connected to both sides of the measurement space, respectively, in which a drawing hole and a drawing hole are formed, a light emitting sensor installed at an upper end of the measuring space inside the case, and emitting a laser beam; The collimating lens focuses on the emitted laser beam at intervals at the tip side, and the laser beam focused on the optical axis at intervals on the collimating lens is reflected to the wire rod side facing the light receiving sensor. A beam splitter for transmitting the reflected laser beam to the light receiving sensor, a sensor unit for receiving a laser beam at the top of the beam splitter and detecting a moving wire, and a sensor unit installed on the upper surface of the case and measuring space An output display unit for numerically displaying the length and the moving speed of the wire rod from the sensor unit that detects the entered wire rod; The control unit includes a control unit for controlling the sensor unit and the output display unit, measuring and calculating the length and the moving speed of the wire rod moved to the sensed data, and outputting the calculation result to the output display unit.

The light emitting sensor of the sensor unit includes a laser pointer that forms a convex lens at the tip and is detectable even when the measured wire is located at a long distance. The light receiving sensor of the sensor unit captures a wire rod surface in real time and is emitted from the light emitting sensor. Receiving the laser beam and detecting the wire rod is composed of an image sensor for estimating the motion of the different image than before and converts it into an electrical image signal.

The controller calculates the displacement of the object by measuring the intensity of the laser beam continuously incident during the exposure time of the wire rod detected by the sensor unit, and calculates and stores the instantaneous velocity value by dividing the displacement value by the fixed exposure time. By measuring the displacement value detected by the wire rod first by the sensor unit from the time point and accumulating the displacement value of the continuously moving wire rod and calculating the final accumulated displacement value of the moved wire rod as a transfer distance. It consists of a digital signal processor (DSP).

In addition, the control unit is capable of measuring the length of the reverse direction of the wire rod moving from the inlet hole of the case toward the inlet hole along with the forward length measurement of the wire rod moving from the inlet hole of the case to the outlet hole, and thus the It is possible to add or subtract the length of the wire rod by reducing the measured travel length in the reverse direction or increasing the measured travel length in the forward direction.

In addition, the control unit sets the length of the wire to be measured in advance, and when the wire rod moving to the measurement detection of the sensor reaches the set measuring length, by sending a signal to the transfer device for supplying the wire rod to brake the transfer device by It is also possible to automatically stop the movement of the wire rod.

Further comprising a Fresnel lens installed on the vertical line to the lower side of the beam splitter in the measurement space inside the case to maintain the maximum light intensity in the laser beam refracted from the light emitting sensor to the wire rod side through the beam splitter; It can also be implemented in the form of measuring the length of the wire rod more accurately.

In addition, the guide member for guiding the wire rod to move smoothly installed in the measuring space inside the case symmetrically up and down, left and right to the center side where the wire rod is located, and to move smoothly, and installed in the rear to support the guide member The guide member is made of an elastic member that can be moved freely up, down, left and right, further comprising a guide portion for smoothly moving the wire rod while maintaining the horizontal line in a form capable of smoothly measuring wire rods of various thicknesses. Can be implemented.

The guide member of the guide part may include a contact part formed of a material having an elastic force to minimize the pressure applied to the wire rod by the pressing force of the top and bottom, left and right to form a curved surface in an arc shape so as to smoothly enter the wire rod forming a circle. It is possible.

According to the apparatus for measuring the length and speed of a moving wire using a laser beam according to the present invention, the length and the speed of the moving wire are collectively processed by detecting the length of the wire and measuring the moving speed along with the process of detecting the length of the wire using the laser beam. It brings mechanization and automation of the measurement, which makes the length measurement work quick and easy, which increases the labor productivity.

In addition, since the length of the moving wire and the speed measuring device using the laser beam according to the present invention can accurately measure the length of the wire through the laser beam emitted from the sensor unit, there is no error due to measurement error, unnecessary material loss It is possible to prevent.

In addition, the length and flux measurement apparatus of the moving wire rod using the laser beam according to the present invention can measure the reduction value according to the movement in the reverse direction as well as the wire movement path in a constant direction can measure the length of the wire rod There is an effect that can be measured more accurately.

In addition, the apparatus for measuring the length and flux of the moving wire using the laser beam according to the present invention maintains the light intensity of the laser beam emitted from the sensor by the Fresnel lens to the maximum to measure the length of the wire more accurately. It is possible to minimize the error.

In addition, the length of the moving wire using the laser beam and the apparatus for measuring the speed of the wire is provided with the guide portion, various types are provided according to the use and the thickness is also applied to measure the length by applying all the wire is formed differently It is easy for the wire rod to enter the measuring device, and it is possible for the entered wire rod to move on the horizontal line without bending and to make more accurate measurements.

1 is a perspective view showing an embodiment according to the present invention.
2 is a cross-sectional view showing an embodiment according to the present invention.
Figure 3 is a conceptual diagram showing the operating principle by the sensor unit in an embodiment according to the present invention.
4 is a conceptual diagram illustrating an operating principle of a sensor unit to which a Fresnel lens is applied in another embodiment according to the present invention.
5 is a cross-sectional view showing yet another embodiment according to the present invention.

Next, a preferred embodiment of the length and the flux measurement apparatus of the moving wire using the laser beam according to the present invention will be described in detail with reference to the drawings.

First, a preferred embodiment of the length and flux measurement apparatus of the moving wire rod using the laser beam according to the present invention, as shown in Figs. 1 and 2, the case 10, the sensor unit 20, and the output display unit 30 And a controller 40.

The case 10 is the most basic appearance body that is the overall technical configuration is installed, specifically forming the inlet hole 11 through which the wire rod 2 enters on one side, the wire rod entered on the other side ( 2) is formed to take out the hole (12), the inside is composed of a measuring space (15) which is a passage for connecting the inlet (11) and the outlet (12) and the sensor unit 20 is provided.

The inlet hole 11, the outlet hole 12 and the measurement space 15 is preferably formed to the same inner diameter so that the wire rod 2 entered is moved on the horizontal line without bending.

The sensor unit 20 detects the wire rod 2 moving into the inlet hole 11 and measures the length and the flux of the wire rod. 11) side or the drawing-out hole 12 side. Preferably, as shown in Figure 2 is provided on the side of the drawing hole (12) is a form that minimizes the distance interval from the position cut with the cutting tool.

The sensor unit 20 receives a light emitting sensor 21 for emitting a laser beam, a collimating lens 23 for focusing the emitted laser beam, and a laser beam passing through the collimating lens 23. And a beam splitter 24 for reflecting to the wire rod side facing the wire rod and transmitting the laser beam reflected from the wire rod side to the light receiving sensor, and a light receiving sensor 22 for receiving the laser beam and detecting the movement of the wire rod 2. .

The light emitting sensor 21 is installed on the upper end of the measurement space 15 inside the case 10 and irradiates a laser beam to the wire 2 that enters through the inlet hole 11 of the case 10. Specifically, a convex lens is formed at the tip and the laser beam is composed of a laser pointer that can be detected even when the moving wire 2 is located at a long distance.

The laser pointer is equipped with a laser diode (LD) for generating a laser by using a forward semiconductor junction, so that the laser can be emitted.

The collimating lens 23 is installed at intervals on the front end side of the light emitting sensor 21 to focus the emitted laser beam and output a parallel beam.

In other words, the laser beam emitted from the light emitting sensor 21 splits and emits at one point, and thus the split laser beam is gathered while passing through the collimating lens 23 and thus the focus is controlled to be switched to the parallel beam. To be done.

In addition, the light emitting sensor 21 may be installed so that the mounting position of the collimating lens 23 from the position of the light emitting sensor 21 close to the light emission by splitting the laser beam at one point. That is, it is preferable that the splitting of the laser beam emitted from the light emitting sensor 21 passes through the collimating lens 23 in the minimum range so that the laser beam forms a constant parallel beam with the smallest focus.

The beam splitter 24 is mounted on the optical axis at intervals from the collimating lens 23 so as to convert the laser beam passed through the collimating lens 23 downward. That is, the laser beam emitted from the light emitting sensor 21 is reflected to the side facing the light receiving sensor 22 (the wire rod side), and the laser beam reflected from the wire rod 2 side is transmitted to the light receiving sensor 22 side. .

In addition, the beam splitter 24 preferably includes a polarizing beam splitter that reflects linearly polarized light emitted from the light emitting sensor 21 and transmits linearly polarized light delayed by 1/2 wavelength, and the beamsplitter is an incident laser beam. Since it will be apparent to those skilled in the art as the divided into a transmission beam and a reflection beam, detailed description thereof will be omitted.

The light receiving sensor 22 detects the laser beam at the upper end of the beam splitter 24 and detects the distance change by estimating the movement of the moving wire 2 in accordance with the detection signal. Is taken in real time and receives the laser beam emitted from the light emitting sensor 21, when the wire rod (2) is detected consists of an image sensor for estimating the movement of the different image than before to convert it into an electrical image signal.

Here, the image sensor is preferably provided with a charge coupled device (CCD) image sensor.

The CCD is a charge coupled device, in which fine pixels are arranged in detail, and each pixel stores an image by converting light entering through the lens into charge. That is, since the positions of each of the pixels consisting of millions are different and the magnitude of the electric charges included are also different, the information of the pixels is combined to make the subject information.

The output display unit 30 is installed on the upper surface of the case 10 and measures the length and the moving speed of the wire rod 2 measured from the sensor unit 20 that detects the wire rod 2 entered into the measurement space 15. It is made to display numerically.

At this time, the output display unit 30 to display the length and the moving speed of the wire rod (2).

The output display unit 30 displays the set value when the wire rod 2 is moved by a preset value, or is measured starting from the time when the light receiving sensor 22 detects the movement of the wire rod 2. It may be implemented in various forms, such as a real-time numerical display method to continuously display the numerical value.

The control unit 40 emits a laser beam from the light emitting sensor 21 by supplying power, and intensity of the laser beam continuously incident during the exposure time of the wire rod 2 detected by the sensor unit 20. ), The displacement of the object is calculated and the internal memory for calculating and storing the instantaneous velocity value by dividing the displacement value by the fixed exposure time, and the displacement value first detected by the wire rod 2 by the sensor unit 20. Is calculated from the point of time and is a digital signal processor (DSP) that calculates the displacement value of the continuously moving wire rod 2 and calculates the final accumulated displacement value of the moved wire rod 2 as a feeding distance. Is done.

The digital signal processing system is a system capable of processing a digital signal that enables processing including arithmetic operations such as adding, subtracting, winning, and regulating the information expressed in a digital format.

The controller 40 is set in advance by storing the distance from the measuring point A1 at which the wire rod 2 is detected to start measurement to the end point A2 of the outlet hole 12 of the case 10. In other words, from the measuring point A1 where the wire rod 2 can be sensed by the sensor unit 20 to the end point A2 of the lead hole 12, which is a position where the wire rod 2 can be drawn out and cut by the cutting tool. The distance L1 is stored in the control unit 40 and the value obtained by subtracting the length D3 from the actual moving length D2 is displayed on the output display unit 30.

That is, the expected measurement length D1 to be measured may be expressed as follows.

[Equation 1]

D1 = D2-D3

In addition, the control unit 40 calculates the displacement value of the wire rod 2 that is continuously moved by measuring the displacement value at which the front end of the wire rod 2 is first detected by the sensor unit 20 from the time point and accumulates the movement. The final cumulative displacement of the wire rod is calculated as the feed distance.

In addition, the control unit 40 at the outlet hole 12 of the case 10 together with the forward length measurement of the wire rod 2 moving from the inlet hole 11 of the case 10 toward the outlet hole 12. It is possible to measure the length of the reverse direction of the wire rod 2 moving toward the inlet hole 11, so that the measurement of the length of movement in the measured reverse direction from the measuring point A1 is reduced or the length of movement in the forward direction is increased. It is desirable to allow the wire rod 2 to be added or subtracted by measuring the length of the wire 2.

That is, the controller 40 calculates the length of movement in the reverse direction as it moves toward the inlet hole 11 when the length to be measured is measured together with the length measurement of the wire rod 2 moving toward the outlet hole 12. To reduce the measurement.

For example, when the length of the wire rod 2 is to be measured 20 m and the moving wire rod 2 moves 22 m past it and is displayed on the output display unit 30, the wire rod 2 is moved in the reverse direction by 2 m. In this case, the measured value that decreases by measuring the length moving in the reverse direction is displayed on the output display unit 30 so that the length of the wire rod 2 of 20 m to be measured can be measured.

In addition, the controller 40 presets the length of the wire rod 2 to be measured, and when the wire rod 2 moving to the measurement detection of the sensor unit 20 reaches the set measurement length, the wire rod 2 ) Is made to stop the movement of the wire rod 2 automatically by sending a signal to a transfer device (not shown in the drawing) to brake the transfer device.

Next, the operation relationship between the length of the moving wire and the speed measuring device using the laser beam according to a preferred embodiment of the present invention.

First, Figure 3 is a conceptual diagram showing the operation principle of the sensor unit according to the length of the moving wire and the beam speed measurement apparatus using the laser beam of the present invention, referring to this, by pressing the operation switch (not shown in the drawing) is applied to the control unit Sensing is possible in the sensor unit 20 with the signal of 40.

Here, the sensor unit 20 emits a laser beam from the light emitting sensor 21 to the collimated lens 23 positioned on the horizontal line by applying power, and the emitted laser beam passes through the collimated lens 23. The laser beams gathered at one focal point are irradiated to the beam splitter 24 and refracted in a right angle to the wire rod surface, and the laser beam reflected from the wire rod surface is finally incident to the light receiving sensor 22. Recognize.

In this case, when the wire rod 2 entering the inlet hole 11 of the case 10 is detected and a signal is applied, the light receiving sensor 22 captures the movement of the wire rod 2 in real time and continuously moves to change the image. The signal is sensed by the control unit 40.

That is, the laser beam emitted from the light emitting sensor 21 is finally irradiated to the light receiving sensor 22. When the wire 2 is detected by the wire beam 2, the light receiving sensor 22 enters and continues. The wire rod 2 that is moving is estimated by the motion to the controller 40.

Subsequently, the control unit 40 receiving the signal from the sensor unit 20 measures the displacement value at which the front end of the wire rod 2 is sensed as a starting point, calculates a cumulative displacement value that changes according to the movement of the wire rod 2, and then loads the wire rod 2. In addition, the control unit 40 calculates the moving speed value of the wire rod 2 by dividing the displacement value by the time when the wire rod 2 is sensed and exposed by the light receiving sensor 22. ) Length and the moving speed are displayed on the output display unit (30).

That is, according to the apparatus for measuring the length and flux of the moving wire using the laser beam according to the present invention, the length of the moving wire is detected by using the laser beam as well as the length change and the moving speed are measured and displayed. And the mechanization and automation of the flux measurement, thereby making the length measurement work quick and easy, thereby increasing labor productivity.

In addition, since the length of the moving wire and the speed measuring device using the laser beam according to the present invention can accurately measure the length of the wire through the laser emitted from the sensor unit, there is no error due to the measurement error, thereby reducing unnecessary material loss. prevent.

In addition, the length of the moving wire rod and the speed measuring apparatus using the laser beam according to the present invention can measure the decrease in accordance with the movement in the reverse direction as well as the wire movement path in a constant direction can measure the length of the wire rod There is an effect that can be measured more accurately.

In addition, according to another embodiment of the apparatus for measuring the length and the speed of the moving wire using the laser beam according to the present invention, as shown in FIG. 4, the lower side of the beam splitter 24 in the measurement space 15 inside the case 10. Fresnel lens is installed on a vertical line and is emitted from the light emitting sensor 21 to maintain the maximum light intensity in the laser beam refracted toward the wire rod 2 through the collimating lens 23 and the beam splitter 24 It is also possible to further include a (Fresnel lens) (60).

The fresnel lens 60 will be described in detail. The laser beam emitted from the light emitting sensor 21 and reflected by the beam splitter 24 through the collimating lens 23 is reflected by the fresnel lens 60. Maintain 100% light intensity of the laser.

That is, if the present invention is configured as in the other embodiments described above, it is possible to minimize the error of the measurement by more accurately measuring the length of the wire by maintaining the maximum light intensity of the laser emitted from the sensor.

Also in the above-described other embodiments, the present invention can be implemented in the same configuration as the above-described embodiment except for the above-described configuration, and thus detailed description thereof will be omitted.

In addition, another embodiment of the apparatus for measuring the length and flux of the moving wire using the laser beam according to the present invention is installed in the measuring space 15 inside the case 10 as shown in FIG. It is also possible to further comprise a guide portion (70) which is respectively mounted on the symmetrical position up, down, left and right so that 2) moves smoothly while maintaining the horizontal line.

The guide part 70 is symmetrically up, down, left, and right in the measurement space 15 inside the case 10 so as to protrude to the center side where the wire rod 2 is located, and the wire rod 2 which moves smoothly moves. It is made by installing a guide member 71 for guiding the guide member and an elastic member 73 installed at the rear to support the guide member 71 and allowing the guide member 71 to be freely moved up, down, left and right.

The guide member 71 of the guide portion 70 minimizes the pressure that the wire rod 2 receives due to the pressing force of the top and bottom, left and right and the curved end in an arc shape so that the entry of the wire rod 2 in a circular shape is smooth. It is possible to include a contact portion (71a) formed of a material having an elastic force so as to.

Preferably, the contact portion is selectively used among materials having elastic force such as rubber and urethane.

When the present invention is configured as in the other embodiment described above, various types are provided according to the use, and the wire is made easy to enter the measuring device in measuring the length by applying all the wires which are formed in different thicknesses. It is also possible for the entered wire rod to move on the horizon without bending and to make more accurate measurements.

Also in the above-described other embodiments, the present invention can be implemented in the same configuration as the above-described embodiment and / or other embodiments, except for the above-described configuration, and thus detailed description thereof will be omitted.

In the above description of the preferred embodiment of the moving wire length and the beam speed measuring apparatus using a laser beam according to the present invention, the technical concept of the present invention is not limited thereto, the claims and the detailed description of the invention and the accompanying drawings. It is possible to perform various modifications and changes within the scope of the present invention, which also belongs to the scope of the present invention.

2: wire rod 10: case
11: drawing hole 12: drawing ball
15: measuring space 20: sensor
21: light emitting sensor 22: light receiving sensor
23: collimating lens 24: beam splitter
30: output display unit 40: control unit
60: Fresnel lens

Claims (10)

A case having a measurement space formed therein and communicating with both sides of the measurement space to form a drawing hole and a drawing hole;
A light emitting sensor installed at an upper end of the measurement space inside the case to emit a laser beam, a collimating lens for focusing the emitted laser beam at a distance from a distal end of the light emitting sensor, and a gap between the collimating lens A beam splitter installed on the optical axis and reflecting the concentrated laser beam to the wire rod side facing the light receiving sensor and transmitting the laser beam reflected from the wire rod side to the light receiving sensor; and receiving and moving the laser beam from the upper end of the beam splitter. A sensor unit having a light receiving sensor for detecting a wire rod;
An output display unit installed on the upper surface of the case and displaying the length and the moving speed of the wire in numerical values from the sensor unit sensing the wire rod entering the measurement space;
A control unit for controlling the sensor unit and the output display unit, measuring and calculating the length and the moving speed of the wire rod moved to the sensed data, and outputting the calculation result to the output display unit; Including,
The controller measures the displacement value of the wire rod first detected by the sensor unit from the time point and accumulates the displacement value of the continuously moving wire rod, and calculates the final accumulated displacement value of the moved wire rod as the transfer distance. In addition, it is possible to measure the reverse length of the wire rod moving from the inlet hole of the case toward the inlet hole with the forward length measurement of the wire rod moving from the inlet hole of the case, so that the measured point from the measured point An apparatus for measuring the length and velocity of a moving wire rod using a laser beam, characterized in that the length of the wire rod is added or subtracted by decreasing the moving length measurement value in the reverse direction or increasing the moving length measurement value in the forward direction. The method according to claim 1,
The light emitting sensor of the sensor unit, measuring the length and the flux of the moving wire rod using a laser beam, characterized in that the convex lens formed at the tip and the wire rod to be measured is composed of a laser pointer that can be detected even at a long distance. The method according to claim 1,
The light receiving sensor of the sensor unit is an image sensor which photographs the wire rod surface in real time, receives the laser beam emitted from the light emitting sensor, and when the wire rod is detected, estimates the movement of an image different from the previous one and converts it into an electric image signal. Length and beam velocity measuring apparatus of a moving wire using a laser beam. The method according to claim 1,
The controller calculates the displacement of the object by measuring the intensity of the laser beam continuously incident during the exposure time of the wire rod detected by the sensor unit, and calculates the instantaneous velocity value by dividing the displacement value by the fixed exposure time. A device for measuring the length and flux of a moving wire using a laser beam, comprising: an internal memory for storing and a digital signal processing system for accumulating a transfer distance based on a moving displacement value by adding from a time point at which the wire is detected. . delete delete The method according to any one of claims 1 to 4,
The control unit automatically sets the length of the wire to be measured in advance and sends a signal to the transfer device for supplying the wire rod to brake the transfer device when the wire rod moving to the measurement detection of the sensor part reaches the set measurement length. Length and flux measurement apparatus of the moving wire rod using a laser beam, characterized in that to stop the movement of the wire rod. The method according to claim 1,
Further comprising a Fresnel lens installed on the vertical line to the lower side of the beam splitter in the measurement space inside the case to maintain the maximum light intensity to the laser beam refracted from the light emitting sensor to the wire rod side through the beam splitter A device for measuring the length and flux of a moving wire using a laser beam. The method according to claim 1,
A guiding member symmetrically arranged up and down and left and right in the measurement space inside the case so as to protrude to the center side where the wire rod is located and to guide the wire rod to move smoothly;
An elastic member installed at a rear side to support the guide member and allowing the guide member to be freely moved up, down, left and right; Length of the moving wire rod and the speed measuring device using a laser beam further comprises a guide portion to make the entry to the wire rod to keep the horizontal line to move smoothly. The method according to claim 9,
The guide member of the guide part is a laser including a contact portion formed of a material having an elastic force to minimize the pressure received by the wire rod to form a curved surface in the arc shape and the pressing force to the top, bottom, left and right to facilitate the entry of the circular wire rod smoothly Device for measuring the length and flux of moving wires using beams.

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