JP2006017500A - Apparatus for measuring tension of traveling wire rod - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tension and linear density measuring apparatus capable of suppressing the effects to traveling wire rods and performing online measurements. <P>SOLUTION: The tension and linear density measuring apparatus is constituted of two sets of guide roller devices 10 and 20 for restraining a wire rod traveling in the longitudinal direction at two front-stage and rear-stage locations, a vibration displacement detecting device 40 for detecting the vibrated vibration waveform of the wire rod 1 at a span section L between the two sets of guide roller devices 10 and 20, and an information processing controller unit 30 for computing the tension or density of the wire rod, when the distance between the two sets of guide roller devices 10 and 20 and the linear density or tension of the wire rod are inputted. One of the two sets of guide roller devices 10 and 20 is provided with a vibration device 27 for making vibrating the wire rod vibrate laterally, by vibrating it in its radial direction as the changing frequency. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention improves the quality and quality of a wire by measuring the tension or the wire density of a running wire that is performing winding or stretching work on-line (real-time measurement while manufacturing a wire product). The present invention relates to a tension measuring device that strengthens management.

  When a metal wire (electric wire) of about 20 km wound on a large reel is cut to about 1000 m to 2000 m, and each is wound up on a small reel and divided into small parts, the tension of the wound wire is large. The wire extends and deforms thinly. Therefore, in the winding process of the wire, the tension is adjusted by applying resistance to the pulley that is in contact with the wound wire. The tension value of the running wire is usually measured from time to time with a three-roller type contact tension meter, etc., and the wire rod is adjusted by adjusting the braking force of the outgoing mechanism such as the feeder or adjusting the friction of the shaft of the intermediate pulley. Although the tension of the wire is adjusted, the tension meter is easily brought into contact with the wire to cause bending deformation, so that the tension is affected and the quality of the wire is easily lost. Moreover, since the tension cannot be measured online, the adjustment of the tension due to the contact of the load member is delayed, and many defective products may be produced.

  It is required to measure the tension online without affecting the wire, but as such a method, there is an environmental disturbance to the wire running between the gripping parts such as rollers, etc. A method has been proposed in which the free vibration is measured by frequency analysis and the dominant component is obtained, and the wire tension is calculated from the value of the distance between the wire support, the value of the wire linear density, and the reference vibration order of the dominant vibration. ing. (See Patent Document 1)

  In addition to the above, as a device that measures the tension of the running wire online, a sudden speed change in the direction perpendicular to the running direction of the wire is given at one end of the grip, and the wire running due to the bending deformation wave (lateral wave) of the resulting wire A method has been proposed in which the propagation velocity in the direction is measured and the tension is calculated based on the measured velocity. (See Patent Document 2)

In order to measure the thickness of the running wire online, the laser beam is projected onto the wire to be measured, the transmitted light is received by a photodiode, a CCD line sensor, etc., and the thickness is obtained from the amount and position of the received light. Although there are methods, etc., there are few measuring instruments that measure the line density of the running wire on the machine online, although there is a high necessity.
Japanese Patent Laid-Open No. 9-21713 JP-A-10-305966

  As described above, the 3-roller type tension measuring device is in contact with the wire and bends the wire, so that the wire requires precise on-line measurement, the twisted wire that is easily damaged by bending, the bending rigidity is large, and the fiber is fragile. Not suitable for processing. Therefore, (1) of the problem to be solved by the present invention is to provide a measuring apparatus that can suppress the influence on the wire and reduce the on-line measurement.

  The measurement method described in Patent Document 1 is a method of measuring the vibration frequency excited by the environmental noise and measuring the free frequency of the target order from the dominant frequency. There is a drawback in that it requires a means to obtain the frequency and extra time is required for the calculation, etc. In addition, depending on the characteristics of the environmental noise, the natural frequency component is small and the target frequency is higher than the resonance frequency due to forced vibration. Compared to the method of obtaining the free frequency of the order, there is a drawback that it is difficult to obtain the accuracy of the frequency.

  Furthermore, since the travel speed of the wire is not taken into account in the information processing for calculating the tension from the measured frequency, when the travel speed of the [wire travel speed] / [wave speed of the transverse wave] is a non-negligible travel speed, The error due to computation increases. Therefore, the problem (2) to be solved by the present invention is to provide an apparatus for measuring the resonance frequency due to forced vibration in order to quickly obtain a highly accurate measured value of tension. In addition, (3) of the problem to be solved by the present invention is to provide an information processing control apparatus that performs an operation taking the traveling speed into consideration in order to enable the tension measurement of the wire that travels at a high speed.

  The measuring method described in Patent Document 2 is a traverse mechanism installed in a synthetic fiber winding mechanism for measuring a thin polymer filament wire with extremely small bending rigidity, such as a synthetic fiber winding process. If you can skillfully use the high-speed excitation by, you can obtain a transverse wave with a relatively sharp flexion that allows you to measure the wave velocity, which is very effective, but most machines generate transverse waves. The mechanism is not provided, and it is difficult to apply when a metal or glass wire whose bending rigidity is higher than that of the polymer filament is to be measured. Therefore, (4) of the problem to be solved by the present invention is to provide a measurement method that does not depend on the measurement of wave velocity in the process of handling a metal wire, a glass wire or the like.

  The linear density is a measure of the mass of the wire cross section, and there is a case where it is desired to control / manage the mass per unit length rather than the volume per unit length. Therefore, (5) of the problem to be solved by the present invention is to provide a measuring apparatus capable of measuring the linear density online.

  In order to solve the above-mentioned problem, the invention described in claim 1 is sandwiched between two sets of guide roller devices for restraining a wire rod traveling in the longitudinal direction at two positions of the front and rear stages, and the two sets of guide roller devices. When the vibration displacement detector for detecting the vibration waveform of the wire rod excited in the span portion and the distance between the two sets of guide roller devices and the wire rod density or wire tension are input, the wire rod tension or wire rod density is calculated. A travel characterized by comprising an information processing control device, wherein one of the two sets of guide roller devices is provided with a vibration device that vibrates the wire rod in the radial direction and changes the frequency while changing the frequency. This is a wire tension measuring device.

  According to a second aspect of the present invention, in each of the two sets of guide roller devices, at least two grooved guide rollers use a wire as a mechanism for restraining vibration of the wire and reducing resistance in the traveling direction. A support base having a wire rod holding mechanism arranged in parallel so as to surround, a roller installation angle setting mechanism for changing the installation angle of each grooved guide roller with respect to the wire rod, and a span length variable mechanism for two sets of the wire rod holding mechanism The traveling wire tension measuring device according to claim 1, further comprising a mechanism installed on or on a separate support base.

  According to a third aspect of the present invention, in the vibration exciter, one of the grooved guide rollers constituting the one wire holding mechanism is connected to a magnet attached to the guide roller and a surrounding concentricity via the shaft of the guide roller. The traveling wire rod tension measuring device according to claim 1 or 2, wherein the device is configured to vibrate in the direction of the guide roller shaft by an electromagnetic force exciter comprising a coil disposed in the wire.

  According to a fourth aspect of the present invention, there is provided a laser displacement meter comprising a means for projecting laser light and a CCD line sensor for receiving the light, and a capacitance for measuring displacement by a capacitance between the object and the object. Type displacement gauge, one of the eddy current type displacement gauge that measures displacement by eddy current change depending on the distance to the object, non-contact vibration displacement to detect the transverse vibration displacement of the wire between measurement spans It is a tension | tensile_strength measuring apparatus of the running wire in any one of Claims 1-3 characterized by the above-mentioned.

  According to a fifth aspect of the present invention, the information processing control device has a function of giving a control input for generating a vibration having a required amplitude and frequency to the vibration exciting device, and is measured by the vibration displacement detecting device. The vibration frequency giving resonance is calculated from the measured vibration waveform, and the wire tension or wire density is calculated from the calculated excitation frequency and the previously input measurement span distance, wire travel speed, wire rod density or wire tension. It is a tension | tensile_strength measuring apparatus of the running wire in any one of Claims 1-4 characterized by the above-mentioned.

  Since the present invention is a method of directly exciting one end of a grooved guide roller for holding a wire and calculating the tension from the resonance frequency, the frequency giving an amplitude maximum with respect to a change in the excitation frequency (giving an amplitude peak) (Resonance frequency) can be obtained, and it is not necessary to obtain the value of the amplitude itself, so the vibration amplitude may be small, and in the vicinity of the resonance frequency, the frequency that gives the maximum amplitude even if the excitation amplitude is minimized. Can be obtained with high accuracy. For this reason, the excitation force on the wire can be made relatively small, and the measurement accuracy can be increased as compared with a method using free vibration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a tension measuring device according to a first embodiment of the present invention, and FIG. 2 is a schematic diagram for explaining the operation of the laser displacement meter 40 of FIG.

  In FIG. 1, a support base 16 is arranged below the travel path of the wire 1, and the support base 16 on the entrance side of the travel path of the wire 1 has a function of holding and exciting the wire 1. A roller device 10 is arranged. A guide roller device 20 that holds the wire 1 is disposed on the support 16 on the exit side of the travel path of the wire 1.

  A connecting plate 6 is provided between the support side 16 on the entrance side and the exit side of the travel path of the wire 1, and the connecting position of the support base 16 is changed by a screw so that the guide roller devices 10 and 20 are connected. The span length variable mechanism which makes the span length variable is configured. When the connecting plate 6 is not used, the support base 16 is separated on the inlet side and the outlet side, and the guide roller devices 10 and 20 are installed on separate support bases 16 to change the span length. You may be able to do it.

  The guide roller devices 10 and 20 both hold the traveling wire 1 and have substantially the same configuration except that the guide roller device 10 has a vibration function. The guide roller device 10 and the guide roller device 20 both rotate by passing through the oval fixed block 2 through the roller shafts 11a and 12a supporting the grooved guide roller 11 and the grooved guide roller 12, respectively. The guide rollers 11 and 12 with grooves are arranged side by side so as to surround the wire 1 and constitute a wire holding mechanism that restrains vibration of the wire 1 and reduces resistance in the traveling direction.

  The wire holding mechanism in the guide roller device 10 and the guide roller device 20 in this embodiment will be described as being constituted by two grooved guide rollers 11 and 12, but the grooved guide roller constituting the wire holding mechanism is Three or more wires may be arranged so as to surround the wire.

  Further, cylindrical bearing members 17 and 18 each having a bearing portion constituted by a slide bearing 21 are fixed to the support 16 on the entrance side and the exit side of the traveling path of the wire 1. On the upper surface of the cylindrical bearing members 17, 18, an elliptical roller installation angle setting plate 3 that is slightly larger than the fixed block 2 is attached so as to be rotatable about the slide bearing 21. One end of the roller installation angle setting plate 3 is provided with a hole 3a as a fulcrum. Then, an installation angle with the slide bearing 21 as an axis is set, and the roller installation angle setting plate 3 is fixed to the upper surface of the bearing member 17 or 18 by the fixing screw 4 inserted through the hole 3a, and each grooved guide roller The installation angle with respect to the wire 1 of 11 and 12 can be fixed.

  Further, the roller shaft 11 a of the grooved guide roller 11 penetrating the fixed block 2 is fitted into the hole 21 a of the slide bearing 21, and the roller shaft 12 a of the grooved guide roller 12 is a hole 3 b provided in the roller shaft setting plate 3. Is fitted.

  Up to the above configuration, the guide roller device 10 and the guide roller device 20 have substantially the same configuration. However, since the guide roller device 10 includes a vibration device in the bearing member 17, the guide roller device is here. The vibration device 27 in the ten bearing members 17 will be described in detail.

  In the following description, the grooved guide roller 11 of the guide roller device 10 and the grooved guide roller 12 of the guide roller device 10 are attached to distinguish from the grooved guide rollers 11 and 12 of the guide roller device 20. This is referred to as roller 12.

  The roller shaft 11a of the vibration roller 11 passes through the slide bearing 21, and a cylindrical permanent magnet 22 is coaxially fixed to the tip thereof. The cylindrical permanent magnet 22 is housed and disposed in a cylinder 24 installed in the bearing member 17 with a coil 23 wound around the outer periphery and a bottom surface fixed to the support base 16. The cylinder 24 is formed of a material that does not magnetically shield when a current flows through the coil 23, such as a resin. In the cylinder 24, a coil spring 25 loosely fitted to the shaft 11a is disposed on the upper surface of the permanent magnet 22, and the permanent magnet 22 is held at a position intermediate between the upper surface and the bottom surface in the cylinder 24. The roller 11, the bearing member 17, the slide bearing 21, the permanent magnet 22, the coil 23, the cylinder 24, and the coil spring 25 constitute the vibration device 27.

  The tension measuring device 100 according to the present embodiment includes a guide roller device 10 having functions of holding and exciting the wire 1 on the entrance side, a guide roller device 20 that holds the wire 1 on the exit side, and a laser displacement meter 40. And the information processing control device 30.

  First, the guide roller device 10 will be described. The vibration roller 11 is vibrated by the vertical movement of the roller shaft 11a and causes the wire 1 to undergo lateral vibration. The roller shaft 11a is constrained by a slide bearing 21 and has a structure allowing only vertical motion. A permanent magnet 22 is attached (fixed) to the lower end of the roller shaft 11a, and the vertical motion is elastically constrained by a coil spring 25. The coil 23 is supplied with a control current, and the magnet is driven by electromagnetic force with the roller shaft 11a and the coil 23 arranged concentrically around the roller shaft 11a, thereby causing the roller shaft 11a to vibrate up and down. Vibrate. Thus, the guide roller device 10 constitutes an electromagnetic force exciter.

  The roller shafts 11 a and 12 a are fixedly coupled by the fixed block 2, so that the attached roller 12 moves together with the vibration roller 11 as the roller shaft 11 a moves up and down. The vibration roller 11 and the attached roller 12 are rotatably attached to the roller shafts 11a and 12a, respectively, so that the contact resistance with respect to the travel of the wire is reduced.

  When the angle formed between the wire connecting the centers of the grooved guide rollers 11 and 12 and the wire 1 is changed, the contact pressure of the guide rollers with both grooves on the wire 1 can be changed. For this reason, the roller installation angle setting plate 3 is freely fitted to the outer periphery of the slide bearing 21, and at the same time, the roller shaft 12a is also freely fitted to the hole 3b of the roller installation angle setting plate 3 at its tip. ing. The roller installation angle setting plate 3 is rotated around the outer periphery of the slide bearing 21 (around the central axis of the guide roller shaft 11a), and the rotation can be fixed by the roller setting angle fixing screw 4 to arbitrarily set the roller installation angle.

  Next, the guide roller device 20 will be described. Similar to the guide roller device 10, the guide roller device 20 has two grooved guide rollers 11 and 12 at the upper end, thereby holding the wire 1. The grooved guide rollers 11 and 12 are configured to freely rotate by a slide bearing 21 with respect to the roller shafts 11 a and 12 a, and both shafts are fixed by a fixed block 2.

  The roller installation angle setting plate 3 is fitted to the slide bearing 21 so as to be freely rotatable around the slide bearing 21, and the lower end of the roller shaft 12 a is rotatably fitted to the hole 3 a of the roller installation angle setting plate 3. For this reason, the contact resistance force between the two grooved guide rollers 11 and 12 and the wire 1 turns the roller installation angle setting plate 3 around the slide bearing 21 and the wire and the wire connecting the two roller shafts 11a and 12a. It can be adjusted by changing the angle formed by 1.

  Next, the tension measurement in the running wire 1 will be described. When oscillated by the guide roller device 10, the traveling wire 1 vibrates, and the lateral vibration, that is, the vertical vibration in FIG. 1, is supported through a fixing member 19 fixed at an appropriate position on the support base 16. It is measured by a vibration displacement detector 40 (which will be described by taking a laser displacement meter as an example in the following description) 40.

  Laser light from the laser light source 41 is incident on the traveling wire 1, and the reflected light is received by the CCD line sensor 42. Since the light receiving position on the CCD line sensor 42 changes depending on the vertical position of the traveling wire 1 as shown in FIG. 2, the vertical displacement of the traveling wire 1 is detected from the light receiving position, and the vibration waveform of the traveling wire 1 is output. To do.

  The laser displacement meter 40 may be a transmitted light type in addition to the reflected light type. In that case, the laser light source 41 and the CCD line sensor 42 are opposed to each other with the wire 1 in the direction perpendicular to the paper surface in FIG. When the wire 1 is a metal wire, it is effective to use a capacitance type non-contact displacement meter or an eddy current type non-contact displacement meter instead of the laser displacement meter 40 for measuring the displacement of the running wire 1. It is.

  The system of the information processing control device 30 and the information flow are as follows. Prior to the measurement, the length L of the measurement target span, the mode order n used for the measurement, the traveling speed V of the wire 1, the density ρ of the wire 1, and the like are input from the external input device 33 to the calculation unit 35.

The computing unit 35 outputs information for causing the vibration roller 11 of the guide roller device 10 to vibrate with the vibration frequency f and the amplitude h ₀ to the waveform generation circuit 32 according to a predetermined control command. A current for generating the frequency and amplitude is applied to the coil 23 of the guide roller device 10. At this time, the vibration waveform detected by the laser displacement type is input to the calculation unit 35 through the interface circuit 34.

The calculation unit 35 stores the vibration frequency f, the vibration amplitude h ₀ , and the input vibration amplitude h of the wire 1 which are output and displayed on the display device 50 as necessary. The above vibration, measurement, and recording are sequentially performed by changing the vibration frequency f and the amplitude h ₀ of the vibration roller 12 in accordance with the control command of the arithmetic unit, and the amplitude ratio τ = h / h ₀ with respect to the vibration frequency change. The frequency f _n giving the maximum is obtained. f _n is the frequency that gives the n-th maximum with respect to the change in frequency, that is, the n-th resonance frequency.

(A) In the case of tension measurement From the measurement target span L, the wire density ρ of the wire, the travel speed V of the wire, and the n-th resonance frequency fn obtained from the measurement, the tension is calculated by the following equation. T is calculated.

(B) In the case of linear density measurement When the wire tension is obtained by another measurement method, or when the tension can be regarded as constant without changing during operation due to the structure of the measurement target machine, and the value is known, From the wire tension T input from the external input device, the measurement target span L, the travel speed V of the wire, and the measured n-th resonance frequency f _n , the linear density ρ between the spans of the wire is calculated by the following equation. The

The above expression is an expression that gives the linear density for the case where the linear density can be considered to be almost constant between the spans of the wire. Although it is usually very difficult to measure the line density of a running wire online, this measurement method is effective when the wavelength of the change in the line density along the wire of the wire is somewhat longer than the span. . When the volume density of the wire is constant, it can be used for on-line control of the thickness of the wire.

Hereinafter, the operation of the information processing control device 30 will be described with reference to the flowcharts shown in FIGS. 3 and 4A to 4E.
First, in S1, it is selected whether this measuring apparatus is used for tension measurement or linear density measurement.
In the case of tension measurement for the known physics, the wire density ρ and the traveling speed V of the wire are input. In the case of linear density measurement, a wire tension T and a traveling speed V are input. In S2, the measurement span L and the measurement resonance order n are input in common to both measurements.

  Next, it is selected whether the measuring apparatus is used in the manual mode S3 or in the auto mode S6. In the manual mode S3, the user makes a determination when searching for the resonance frequency, and the user makes a determination of the final accuracy. The manual mode S3 is used for preparation measurement and the like.

  On the other hand, in the auto mode S6, the resonance point search conditions and final accuracy are input in advance, and the resonance point search is automatically performed in accordance therewith, and is used for real-time, online measurement and control.

Manual mode S3 are user excitation frequency f in S4, performs Pick vibration amplitude h ₀ vibrate, measuring the amplitude h of the wire against which loops around until S5, the amplitude ratio τ in the trial The resonance frequency f _n giving the maximum value is found, and then the measurement mode S23 is executed by the subprogram E, the tension T or the linear density ρ is measured, subsequently displayed, and the process ends.

In automatic mode S6, first, as a sweep measurement conditions in the subprogram A shown in FIG. 4 (a), on the sweep f, entering a lower limit f _p ^*, f _q ^* and between the number of measurements N. Subsequently, the initial excitation amplitude h ₀ ^* , h measurement full scale h _f , excitation amplitude adjustment coefficients m ₁ and m _2, and coefficient ε giving relative accuracy in the resonance frequency search are input.

From the above sweep conditions, in the subprogram B shown in FIG. 4 (b), the measurement start initial value was determined, and the subprogram C shown in FIG. 4 (c) was equally divided into N within the sweep frequency range. The vibration is sequentially performed at each frequency, and the wire amplitude h (j) at the j-th frequency is obtained for j = 1 to N. If the amplitude h (j) of the wire is too large and exceeds the full scale h _f of the measurement, or if it is too small and the measurement accuracy is difficult to obtain, it passes through the loop of S13, S14, S15, S16, S13 or S13 of this loop. The excitation amplitude is increased or decreased by a loop in which the route is replaced with the route of S17 and S19 so that it is within the full scale of the wire rod amplitude measurement. The excitation amplitude h ₀ at this time is set as an allowable excitation amplitude H (j). From this, the amplitude ratio τ (j) = h (j) / H (j) at the j-th frequency is calculated.

Next, the frequency f (J) that gives the maximum to the amplitude ratio τ (j) is obtained in the sweep range j = 0 to N by the subprogram D shown in FIG. Subsequently, an operation for increasing the accuracy of f (J) is performed by the program S7 of the main flow. The That program S8, f compared (J) and the resonant frequency f _n obtained so far, if the relative difference is greater than f is, C following loop as the sweep range J-1 to J + 1 by the program S10 repeat.

When the relative difference satisfies the condition of S8, this is set as the resonance frequency f _n , the tension T is calculated in the case of the wire tension measurement by the subprogram E shown in FIG. In this case, the linear density ρ is calculated. These are then displayed.

  When the measurement is continued continuously, the process from B to S11 in the main flow is repeated.

[Tension measurement example]
For a metal wire having a wire rod density ρ = 0.000113 kg / m, the set tension is 0.14N, 0.26N, 0.36N, 0.47N, 0 according to the measurement span L = 0.2 m and the use mode n = 1. FIG. 5 shows the measurement results obtained by changing the traveling speed from 0 to 250 m / min for each case of .57N. Here, the set tension is a value indicated by a three-roller tension measuring instrument obtained by adjusting the balance weight that changes the wire resistance when the wire is stationary. Within this condition, the error is within a few percent, and the applicability to online control such as metal wire processing and rewinding is proved.

[Example of linear density measurement]
Measure the wire density for the a, b, c, and d4 types of metal wires under the conditions of the measurement span L = 0.2 m and the use mode n = 1, where the wire tension is 0.49 N and 0.686 N. The results are shown in FIG. Under these conditions, it is proved that application to on-line control of linear density is possible.

  In the present invention, the lateral vibration is constrained at the support portions at both ends of the measurement span, but with respect to running, a grooved rotary roller having a small resistance is pressed to suppress contact resistance, and one roller is displaced and excited in the lateral direction of the wire. By measuring the lateral vibration of the wire in a non-contact manner using a laser displacement meter or the like, continuous measurement with reduced contact resistance to the running wire is made possible.

  Further, in the present invention, the forced excitation is realized with little influence on the wire by displacing and exciting one of the support roller portions. Conventionally, the gripping of the wire by the support roller having a very low resistance to running as in the present invention has not been conceived. Therefore, the vibration of the wire without contacting the wire between the set spans can be applied to the ferromagnetic wire. It was almost impossible except for a method of exciting with a magnet vibrator and a method of exciting a light and large volume yarn with sound pressure.

  Also, in the present invention, a theoretical formula taking into account the traveling speed of the wire rod is derived in a form that can be applied to higher order vibrations, and an information processing control device is introduced that is introduced into a calculation unit that calculates tension. This enables application to high-speed running wire.

  In the present invention, two or more (for example, 3) guide rollers at both ends of the span are set as one set, and the rollers are installed so as to face each other with the wire interposed therebetween, as if the wire is 2 or more. The guide roller passes through a circular hole formed by surrounding the U-shaped groove, but the restriction is realized. In addition, in order to remove backlash at the contact portion between the wire rod and the roller groove, the contact pressure between the wire rod and the roller groove can be adjusted by moving the shafts of the two rollers slightly in the direction perpendicular to the wire running direction. Yes.

  In the present invention, the running wire tension measuring device is a device that calculates the wire tension using the theoretical formula from the measurement of the resonance frequency when the line density is known, but using the exact same device, If the wire tension is already known, the wire density of the wire can be calculated using the above theoretical formula by measuring the resonance frequency in the same way. Can be used as a line density measuring device for running wire. However, the tension or linear density cannot be obtained unless the linear density or tension is a known amount.

  The present invention has been mainly focused on the application to metal wires, but it can be used for a wide range of materials such as plastic wires, glass wires, filament fibers, staple fibers, and on-line measurement of tension or on-line density. Is possible.

  In addition, from the viewpoints of energy saving, effective use of resources, weight reduction / portability of equipment, etc. Elongation and cutting are likely to occur, and on-line control of tension or line density is required in the wire processing and rewinding processes. The measuring instrument can be applied to such situations.

  The present invention is not limited to the embodiments described above, and various design changes can be made without departing from the present invention described in the claims, and the invention is not limited to the embodiments. Not too long.

(A) is the schematic of the tension | tensile_strength measuring apparatus of the running wire of 1st Embodiment which concerns on this invention, (b) is the schematic top view. It is the schematic for demonstrating an effect | action of the laser displacement meter 40 of FIG. 3 is a flowchart relating to the operation of the information processing control device 30 in FIG. 1. (A)-(e) is a subprogram for demonstrating the flowchart of FIG. It is a graph of the relationship between a set tension | tensile_strength and a running speed by measurement span L = 0.2m and use mode n = 1 about a metal wire. It is a graph which shows the result of having measured the line density about the case where wire rod tension | tensile_strength is 0.49N and 0.686N on condition of measurement span L = 0.2m and use mode n = 1 about a metal wire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire rod 2 Fixed block 3 Roller installation angle setting plate 3a Hole 4 Roller setting angle fixing screw 6 Connecting plate 10, 20 Guide roller device 11, 12 Grooved guide roller 11a, 12a Roller shaft 16 Support base 17, 18 Bearing member 19 Fixed member 21 Slide bearing 22 Permanent magnet 23 Coil 24 Tube 25 Coil spring 27a Hole 30 Information processing control device 32 Waveform generation circuit 33 External input device 34 Interface circuit 35 Calculation unit 40 Laser displacement meter 41 Laser light source 42 CCD line sensor 50 Display device 100 Tension measuring device

Claims (5)

  Two sets of guide roller devices that constrain the wire running in the longitudinal direction at two locations, the front stage and the rear stage, and vibration that detects a vibration waveform of the wire that is vibrated in a span portion sandwiched between the two sets of guide roller devices A displacement detection device and a distance between the two sets of guide roller devices, and an information processing control device that calculates the wire rod tension or wire rod density when inputting the wire rod density or wire rod tension, One is a tension measuring device for a running wire, characterized in that it includes a vibration device that vibrates the wire in the radial direction while changing the frequency to laterally vibrate.   Each of the two sets of guide roller devices includes a wire holding mechanism in which at least two grooved guide rollers are arranged in parallel so as to surround the wire as a mechanism for restraining vibration of the wire and reducing resistance in the traveling direction. Two sets of a roller installation angle setting mechanism for changing the installation angle of each guide roller with a groove with respect to the wire and a wire holding mechanism are installed on a support base having a variable span length mechanism or on a separate support base. The travel wire rod tension measuring device according to claim 1, further comprising a mechanism.   The vibration exciter is an electromagnetic force exciter comprising one of the grooved guide rollers constituting the one wire rod holding mechanism, and a magnet attached to the guide roller shaft and a coil concentrically disposed around the guide roller shaft. The traveling wire tension measuring apparatus according to claim 1, wherein the apparatus is configured to vibrate in the direction of the guide roller shaft.   Laser displacement meter composed of means for projecting laser light and CCD line sensor for receiving light, capacitance displacement meter for measuring displacement by capacitance between the object and the distance to the object A non-contact vibration displacement detecting device is included in the wire rod for detecting the transverse vibration displacement of the wire rod between the measurement spans by one of the eddy current displacement meters that measure the displacement by the eddy current change caused by the eddy current. The tension | tensile_strength measuring apparatus of the running wire in any one of 1-3.   The information processing control device has a function of giving a control input for generating vibration of a necessary amplitude and frequency to the vibration exciter, and an excitation frequency that gives resonance from the vibration waveform measured by the vibration displacement detector. The wire rod tension or wire rod density is calculated from the calculated excitation frequency and the pre-input measurement span distance, wire rod traveling speed, wire rod wire density or wire rod tension. A tension measuring device for a running wire according to any one of the above.

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