KR20010009948A - Vibration monitoring apparatus for optic fiber drawing equipment and method thereof - Google Patents

Abstract

PURPOSE: A vibration monitoring device of optical fiber drawing equipment, which keeps measuring vibration from a rotating body and a feeding body at real time is provide to improve the quality of optical fibers and decrease the loss of productivity because of convenient maintenance. CONSTITUTION: The monitoring method comprises the steps of: detecting vibration signal from the rotating body consisting of a feeding device(6), and rollers(20, 21, 22, 23), and the feeding body consisting of a preform(1) and a furnace(10) by sensors(S1, S2, S4, S31, S32, S33, S34); transferring it to amplifiers(A1, A2, A3, A4), which is changed to an analog signal in an A/D exchanger(52), then is changed again to a digital signal; recording the signal at regular intervals; comparing the recording data with the standard data; giving an alarm if the data is beyond of the standard.

Description

Vibration monitoring device and method for optical fiber drawing device {VIBRATION MONITORING APPARATUS FOR OPTIC FIBER DRAWING EQUIPMENT AND METHOD THEREOF}

The present invention relates to an optical fiber drawing equipment of an optical fiber drawing device.

In general, in order to manufacture a single optical fiber is made of an optical fiber base material manufacturing process, and a drawing process for withdrawing the prepared base material to the optical fiber. In order to take out a strand of optical fiber from the prepared base material, an optical fiber drawing facility is used. In the optical fiber drawing equipment, each equipment is mounted in a vertical direction in a draw tower, and a drawing process is sequentially performed according to the mounting order of the drawing equipment.

A commonly used optical fiber drawing facility is shown in FIG. As shown in Fig. 1, the optical fiber base material 1: preform accurately leveled in the vertical direction by the chuck 8: is moved by the conveying means 6 up and down (arrow ② direction) to the melting furnace 10: in a furnace at a sufficient temperature (about 2000 ° C or higher). The molten base material is drawn out to one strand of optical fiber 2 in the direction of arrow ①. The drawn optical fiber 2 is controlled in diameter by the diameter controller 12 and cooled to a suitable temperature before passing through a cooling unit 14 to coat the optical fiber 2. The cooled optical fiber 3 is coated with a coating device (ultraviolet curing polymer) while passing through a coating device 16 and cured while passing through a plurality of ultraviolet curing devices 18. The optical fiber coating material is coated on the outer circumferential surface by viscosity and surface tension.

Subsequently, the optical fiber 4 passing through the curing apparatus 18 passes through a capstan 20, and then is wound around the winding part 24 through the plurality of rollers 21 and 22. The capstan 20 may provide a predetermined tensile force from the optical fiber base material 1 to draw an optical fiber having a constant diameter size. Reference numeral 23 denotes a take up reel or spool in which the optical fiber is wound.

The melting furnace 10, the diameter controller 12, the cooling device 14, the coating device 16, the curing device 18 and the capstan 20 are stand-type draw towers. ) Is installed around the optical fiber in the vertical direction sequentially to take out a series of drawing process as described above.

Various techniques have been proposed to improve the quality of the optical fiber drawn out in the optical fiber drawing process made of the above series of processes. For example, Frank V. METHOD AND APPARATUS FOR CONTACTLESS MONITORING OF TENSION IN A MOVING FIBER, invented and patented by FRANF V. DiMarcello, et al., Discloses an apparatus for monitoring the tension of the drawn optical fiber. .

Another example, Thomas J. An apparatus for monitoring the position of an optical fiber is disclosed in US Patent No. 5,519,487 (METHOD FOR MONITORING THE POSITION OF A FIBER), which was invented and patented by Thomas J. Atwood et al.

The U.S. Patent Nos. 5,233,200 and 5,519,487 are devices provided during the optical fiber drawing process to improve the quality of the extracted optical fibers.

However, the drawing towers equipped with the latest optical fiber drawing facilities have been developed in the direction of increasing the drawing speed in order to improve productivity while maintaining a certain quality. When the optical fiber withdrawal speed is increased, the optical fiber is vibrated by the vibration of the rotating body or the moving body, or when the abnormality occurs in the rotating body or the moving body, the phenomenon is often caused by disconnection without disconnection. The rotating body of the drawing tower, the vibration of the moving body, etc. are directly transmitted to the drawing tower, which contributed to the deterioration of the quality of the optical fiber.

When the optical fiber quality problem caused by the vibration, it is not easy to determine the abnormality of the rotating body or the moving body without disassembling and confirming the facility directly, and it was a reality that a lot of time was used to identify the cause of the quality problem. In addition, when disassembling the drawer directly to confirm whether it is broken, the operation of the facility is lowered since the facility cannot be driven in the meantime. This acts as an increase factor in the cost of fiber production, and in particular, reduces reliability in terms of fiber quality problems. It is a reality that a separate manpower for inspecting equipment inspections for abnormal vibrations of the withdrawal tower is required every day.

The present invention has been made to solve the above-mentioned problems, the object of the present invention is to provide a vibration monitoring device that can continuously measure in real time the vibration generated in the rotating body or moving object in the draw tower equipment .

Another object of the present invention is to provide a vibration monitoring device that can prevent the quality problems by detecting in advance the occurrence of abnormalities of the rotating body or the moving body of the draw tower equipment.

Another object of the present invention is to provide a vibration monitoring device that can reduce the loss of productivity due to equipment maintenance can be easily determined whether or not caused by vibration when the quality problems of the drawout tower equipment, without having to disassemble the equipment directly. have.

Still another object of the present invention relates to a vibration monitoring apparatus that can easily trace a cause of a problem of a rotating body or a moving body and actively contribute to the improvement of optical fiber quality by applying vibration data to quality control.

In order to achieve the above objects, the present invention provides an optical fiber drawing device installed in the drawing tower,

A vibration detector configured to detect, as a signal, vibration generated at a predetermined position of the optical fiber extraction apparatus;

An alarm state detection unit which stores the vibration signal transmitted from the vibration detection unit as a function of time and frequency, compares the set tolerance with actual data, and outputs data corresponding thereto; And

It includes an alarm device for notifying the user compared to the state of the data compared in the alarm state detection unit.

Moreover, in the vibration monitoring method of the optical fiber drawing equipment,

Detecting a vibration of the optical fiber drawing equipment in operation as a signal using a sensor (a);

(B) storing the data as a function of time and frequency and comparing the set tolerance with actual data;

(C) automatically outputting data when the measured values exceed the allowable range; And

And (d) notifying the output data as a state recognizable by the user.

1 is a schematic view showing a conventional optical fiber drawing process.

Figure 2 is a block diagram showing a vibration monitoring device of the optical fiber extraction facility according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention; In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

2 is a block diagram illustrating a vibration monitoring apparatus of an optical fiber draw equipment according to an exemplary embodiment of the present invention. The draw tower shown in the drawing is a stand type, and is a frame in which the drawing equipment is mounted in the vertical direction in the process order. At this time, since the optical fiber drawing process has already been described in detail with reference to FIG. 1, a detailed description thereof will be omitted.

In the optical fiber drawing facility which consists of the above-mentioned process sequence, a vibration is generated in a rotating body or a feeding body as mentioned above. In the optical fiber drawing facility, a rotating body is a unit that is rotated by a motor (not shown in the figure), and the feeding unit 6 which moves the furnace 6 up and down (arrow ② direction). And a plurality of rollers 20, 21, 22, 23 for guiding the drawn optical fiber to be wound around the spool 23. The roller here refers to the capstan roller 20, the guide rollers 21 and 22, the take-up reel 23, and the like. The transfer device 6 is controlled by the control of the rotational speed of the motor to control the proper moving speed of the melting furnace 10. In addition, the rollers 20, 21, 22, and 23 also control the rotational speed of the motor by a controller (not shown), thereby controlling the rotational speed of the rollers.

On the other hand, in the optical fiber drawing facility, the conveying body refers to the melting furnace 10 which moves up and down about the base material 1 at a predetermined speed by the conveying apparatus 6. The melting furnace 10 is mounted to a carrier 10a, and the carrier 10a is connected to the transfer device 6 and moved up and down depending on whether the transfer device 6 is operated. Among the optical fiber drawing facilities, the diameter controller 12, the cooling unit 14, the coating unit 16 and the ultraviolet curing unit 18 are fixed fixtures that are firmly mounted to the drawing tower. In addition, since the vibration generated in the rotating body and the conveying body is transmitted directly to the drawing tower, the drawing tower may also be included in the conveying body.

Vibration monitoring apparatus according to the present invention is provided with sensors (S1, S2, S31, S32, S33, S34, S4, respectively) to detect the vibration generated in the rotating body or the conveying body. The plurality of sensors S1, S2, S31, S32, S33, S34, and S4 mean an acceleration sensor that can detect vibration. According to the present invention, the acceleration sensors S1, S2, S31, S32, S33, and the like in the optical fiber drawing facility, the conveying device 6, the melting furnace 10, the drawing tower and the plurality of rollers 20, 21, 22, 23, respectively, S34 and S4 are mounted respectively. However, the vibration monitoring device according to the present invention need not be limited to being mounted on the conveying device 6, the melting furnace 10, the drawing tower and the plurality of rollers 20, 21, 22, 23, the present invention is an optical fiber It is to be mounted on all components in which vibration is generated, including all rotating bodies or moving bodies which are not described in the drawing device.

The acceleration sensors S1, S2, S31, S32, S33, S34 and S4 are connected to the respective amplifiers A1, A2, A3 and A4, and the amplifiers are connected to the alarm state detection unit 60. The alarm state detection unit 60 includes an A / D converter 52 and a data processing unit 54. The A / D converter 52 is connected to the data processing unit 54. The amplifiers A1, A2, A3, and A4 are devices for amplifying minute current signals from the acceleration sensors S1, S2, S31, S32, S33, S34, and S4 and converting them into analog signals of a predetermined size. The A / D converter 52 converts an analog signal into a digital signal.

The data processing unit 54 converts and stores the input digital signal as a function of time and frequency, and compares the set tolerance with actual data to alarm when a measured value exceeds the allowable range. The central processing unit (CPU) of a system that generates a signal or allows the plant manager to be automatically contacted. The alarm device 56 connected to the data processor 54 is a device for displaying the processed data so that the facility manager can visually view. For example, a display unit for displaying data or a graph on an image may be used as an example. have. The alarm device 56 may further include an alarm sound generating unit that independently generates an alarm when the stored data exceeds the allowable range by comparing the stored data with the preset allowable range data.

That is, the present invention can visually use the display device as a way to inform the checker whether the drawer and the drawer tower equipped with the drawer is abnormal, it can be used acoustically the alarm device.

Referring to the specific operation of the monitoring device having the above configuration as follows. When the drawing tower facility is operated, the monitoring device is turned on simultaneously with the operation of the facility. Subsequently, the sensors S1, S2, S31, S32, S33, S34, and S4 detect vibration signals generated in the drawing tower, in particular, a rotating body or a conveying body, and each amplifier A1 receives a weak current signal. , A2, A3, A4). The transmitted weak signal is amplified in the amplifier, and the signal amplified to have a constant magnitude is sent to the A / D converter 52. The analog signal sent from the A / D converter 52 is converted into a digital signal and transferred to the data processor 54. The signals transmitted from the transducer 52 are checked at a predetermined time interval and stored in the data processor 54. When the stored data compares the stored data with reference data of a preset allowable range and the stored data exceeds the data of the boundary area, the data processing unit 54 transmits to the alarm device 56, and through the alarm device 56. The measured data is output.

Alternatively, the data processing unit 54 may process the collected data according to the function of the data processing program, convert the collected data into data to be analyzed by the facility manager, and output the data to be displayed on the screen of the display device. As a result, the user can easily check whether there is an abnormality of the drawing tower equipment visually or acoustically.

On the other hand, in the detailed description of the present invention has been described with respect to specific embodiments, it will be apparent to those skilled in the art that various modifications are possible without departing from the scope of the present invention.

As described above, the present invention is to prevent the degradation of the optical fiber quality due to vibration as a preventive check by the pre-management of the establishment of the drawout tower. In addition, when quality problems occurred, it was possible to establish prompt countermeasures by scientifically and reasonably accurate cause tracking, and sufficient data for optical fiber quality control was provided. In addition, in case of problems with the fiber optic outgoing tower equipment, it has the advantage of being able to contact the equipment manager either visually or audibly.

Claims (11)

In the optical fiber drawing equipment installed in the drawing tower, A vibration detector configured to detect, as a signal, vibration generated at a predetermined position of the optical fiber extraction apparatus; An alarm state detection unit which stores the vibration signal transmitted from the vibration detection unit as a function of time and frequency, compares the set tolerance with actual data, and outputs data corresponding thereto; And Vibration monitoring device of the optical fiber extraction facility comprising an alarm device for notifying the user can recognize the data compared in the alarm state detection unit. The method of claim 1, And an A / D converter in which the alarm state output unit converts an analog signal into a digital signal, and a data processor for processing a signal transmitted from the converter. The method of claim 1, The alarm device is a vibration monitoring device of the optical fiber outgoing facility to compare the measured tolerance data and the measured data and output a preset alarm signal to the facility manager when the comparison value exceeds the allowable range. The method of claim 1, Vibration monitoring device of the optical fiber extraction facility for receiving the information output from the data processing unit the alarm state detection unit visually displays. The method of claim 1, Vibration monitoring device of the optical fiber drawing equipment wherein the vibration detection unit is an acceleration sensor. The method of claim 1, Vibration monitoring device of the optical fiber extraction equipment provided in the rotating body or the moving body of the optical fiber extraction equipment. The method of claim 6, Vibration monitoring device of the optical fiber extraction facility is a rotating device of the optical fiber extraction facility is a conveying device for the melting furnace for heating the optical fiber base material or a plurality of rollers for guiding the drawn optical fiber. The method of claim 1, Vibration monitoring apparatus of the optical fiber taking-out facility, the conveying body of the optical fiber taking-out facility is a melting furnace or an extraction tower for heating the optical fiber base material. In the vibration monitoring method of the optical fiber drawing equipment, Detecting a vibration of the optical fiber drawing equipment in operation as a signal using a sensor (a); (B) storing the data as a function of time and frequency and comparing the set tolerance with actual data; (C) automatically outputting data when the measured values exceed the allowable range; And And (d) informing the user of the output data as a state recognizable by the user. The method of claim 9, And amplifying the detected vibration signal between the steps (b) and (c), and converting the amplified analog signal into a digital signal. The method of claim 9, The step (d) is a vibration monitoring method of the optical fiber extraction equipment further comprises the step of audibly outputting a preset alarm signal to the facility manager, if the compared measured value exceeds the allowable range.