阅读说明：本技术 光纤的加工工艺 (Optical fiber processing technology ) 是由 冯高锋 杨军勇 袁卿瑞 王醒东 胡涛涛 孙林波 林志伟 于 2021-07-29 设计创作，主要内容包括：本申请公开了一种光纤的加工工艺,包括气线检测工序,气线检测工序包括以下步骤：1)通过激光发射器向光纤发射垂直于光纤的扇形激光,并通过多个并排设置的激光接收器接收；2)当位于中间的至少一个激光接收器的信号强度突变时,判断光纤出现气线,记录气线的起始位置,并控制收卷设备降低收卷速度；3)当激光接收器接收到的信号强度恢复时,判断光纤没有气线,记录气线的结束位置,在光纤的气线段全部绕设在收卷盘上后,恢复收卷设备的收卷速度。本申请能够在线检测气线的出现位置和结束位置,既方便后期对气线段进行处理,又能够在检测出气线时控制收卷设备降低收卷速度,降低光纤的张力,防止光纤因为气线导致断裂。(The application discloses optical fiber processing technology, including gas line detection process, gas line detection process includes following steps: 1) transmitting fan-shaped laser perpendicular to the optical fiber through a laser transmitter, and receiving the fan-shaped laser through a plurality of laser receivers arranged side by side; 2) when the signal intensity of at least one laser receiver positioned in the middle is suddenly changed, judging that the optical fiber has a gas line, recording the initial position of the gas line, and controlling the winding device to reduce the winding speed; 3) when the signal intensity received by the laser receiver is recovered, judging that the optical fiber has no gas line, recording the end position of the gas line, and recovering the winding speed of the winding device after the gas line section of the optical fiber is completely wound on the winding disc. This application can the on-line measuring gas line appear position and the final position, both make things convenient for the later stage to handle the gas line section, can control rolling equipment reduction rolling speed when detecting out the gas line again, reduce the tension of optic fibre, prevent that optic fibre from leading to the fracture because of the gas line.)

1. The processing technology of the optical fiber comprises a melting process, a cooling process, a coating solidification process and a winding process, and is characterized in that an air line detection process is arranged between the cooling process and the coating solidification process, and comprises the following steps:

1) the method comprises the following steps that fan-shaped laser perpendicular to an optical fiber is emitted to the optical fiber through a laser emitter and received through a plurality of laser receivers arranged side by side, the laser receivers receive the fan-shaped laser and generate light intensity signals, and the signal intensity of at least one laser receiver positioned in the middle is weak;

2) when the signal intensity of at least one laser receiver positioned in the middle is suddenly changed, judging that the optical fiber has a gas line, recording the initial position of the gas line, and controlling the winding device to reduce the winding speed;

3) when the signal intensity received by the laser receiver is recovered, judging that the optical fiber has no gas line, recording the end position of the gas line, and recovering the winding speed of the winding device after the gas line section of the optical fiber is completely wound on the winding disc.

2. The optical fiber processing process according to claim 1, wherein the gas line detection step is performed by a gas line detection apparatus comprising:

the laser emitter is used for emitting fan-shaped laser perpendicular to the optical fiber;

the receiving frame and the laser transmitter are respectively positioned on two sides of the optical fiber;

and the laser receivers are arranged on the receiving frame side by side and are used for receiving the fan-shaped laser.

3. The process for manufacturing an optical fiber according to claim 2, wherein a surface of the receiving frame facing the laser transmitter is an arc surface on which the laser receiver is mounted.

4. The optical fiber processing technology according to claim 2, wherein the gas line detection device further comprises two deviation detection mechanisms, a movement adjustment mechanism and a connection frame, the laser emitter is mounted on the movement adjustment mechanism, and the movement adjustment mechanism is used for driving the laser emitter to move along an X direction perpendicular to the optical fiber, and to approach or leave the receiving frame; the connecting frame is used for connecting the laser transmitter and the receiving frame, and the movement adjusting mechanism can drive the laser transmitter and the receiving frame to move synchronously through the connecting frame; two skew detection mechanism are from top to bottom the interval setting, laser emitter and receiving frame are located between two skew detection mechanism, skew detection mechanism includes:

the laser emitting frame assembly is used for emitting a plurality of parallel light rays, the light rays are divided into two groups, the two groups of light rays are respectively positioned on two sides of the optical fiber, the light rays are perpendicular to the optical fiber, and the light rays are perpendicular to the X direction;

the laser receiving frame assembly is used for receiving the light of the laser emitting frame assembly.

5. The process for manufacturing an optical fiber according to claim 4, wherein the movement adjusting mechanism comprises:

a base;

the sliding rod is fixed on the base;

the screw rod is rotatably arranged on the base and is parallel to the sliding rod;

the adjusting block is provided with a sliding hole and a threaded hole, the sliding rod penetrates through the sliding rod, the screw rod penetrates through the threaded hole and is meshed with the threaded hole, and the laser emitter is fixed on the adjusting block;

and the driving motor is arranged on the base and is used for driving the screw rod to rotate accurately.

6. The process for manufacturing an optical fiber according to claim 4, wherein the connecting frame has a ring shape or an arc shape.

7. The process of claim 1, wherein the melting step comprises: melting the optical fiber preform at 2200-2300 ℃, and drawing the fiber depending on self gravity;

the cooling process comprises the following steps: the drooping optical fiber is cooled and shaped through an optical fiber cooling device and then is further cooled through a cooling pipe.

8. The process for manufacturing an optical fiber according to claim 7, wherein the coating and curing process comprises:

primary coating procedure: applying a resin to an outer surface of the optical fiber by a coating device to form a primary coating layer;

a primary curing process: curing the primary coating layer by the optical fiber through ultraviolet curing equipment;

a secondary coating procedure: coating resin on the outer surface of the primary coating layer by a coating device to form a secondary coating layer;

a secondary curing process: and (3) enabling the optical fiber to pass through ultraviolet curing equipment to cure the secondary coating.

9. The process for manufacturing an optical fiber according to claim 7, wherein the coating and curing process comprises:

primary coating procedure: applying a resin to an outer surface of the optical fiber by a coating device to form a primary coating layer;

a secondary coating procedure: coating resin on the outer surface of the primary coating layer by a coating device to form a secondary coating layer;

a curing process: and the optical fiber passes through ultraviolet curing equipment to cure the primary coating layer and the secondary coating layer.

Technical Field

The invention relates to the field of optical fiber preforms, in particular to a processing technology of an optical fiber.

Background

The optical fiber is obtained by heating and drawing an optical fiber preform, and the existing optical fiber production process generally comprises a melting process, a cooling process, a coating and solidifying process and a winding process. When there is the bubble in the optical fiber perform, when carrying out the wire drawing, gas line can appear in optic fibre, and the optic fibre performance that has gas line can not satisfy the requirement and intensity reduces, when maintaining original wire drawing speed, and optic fibre is easy to be cracked.

Disclosure of Invention

The invention provides a processing technology of an optical fiber aiming at the problems.

The technical scheme adopted by the invention is as follows:

the processing technology of the optical fiber comprises a melting process, a cooling process, a coating solidification process and a winding process, wherein an air line detection process is arranged between the cooling process and the coating solidification process, and the air line detection process comprises the following steps:

1) the method comprises the following steps that fan-shaped laser perpendicular to an optical fiber is emitted to the optical fiber through a laser emitter and received through a plurality of laser receivers arranged side by side, the laser receivers receive the fan-shaped laser and generate light intensity signals, and the signal intensity of at least one laser receiver positioned in the middle is weak;

2) when the signal intensity of at least one laser receiver positioned in the middle is suddenly changed, judging that the optical fiber has a gas line, recording the initial position of the gas line, and controlling the winding device to reduce the winding speed;

3) when the signal intensity received by the laser receiver is recovered, judging that the optical fiber has no gas line, recording the end position of the gas line, and recovering the winding speed of the winding device after the gas line section of the optical fiber is completely wound on the winding disc.

The processing technology of this application optic fibre is through setting up extra gas line and detecting the appearance position and the final position that the process can the on-line measuring gas line, has both made things convenient for the later stage to handle the gas line section, can control rolling equipment reduction rolling speed when detecting out the gas line again, reduces the tension of optic fibre, prevents that optic fibre from leading to the fracture because of the gas line.

The application detects the principle of gas line: the laser transmitter transmits fan-shaped laser perpendicular to the optical fiber, a small part of the fan-shaped laser passes through the optical fiber and then is received by the laser receiver, because of the action of the optical fiber, the signal intensity of at least one laser receiver in the middle is weak, when the optical fiber has an air line, the air line can influence the transmission of the fan-shaped laser entering the optical fiber, and finally the intensity of the laser entering the laser receiver has larger change, such as the intensity is greatly reduced, namely when the signal of at least one laser receiver in the middle is lower than a preset value, the air line in the optical fiber is judged; when the intensity of the laser receiver is recovered, it is judged that there is no air line in the optical fiber. Because the fan-shaped laser is adopted, the optical fiber deviation does not influence the detection of the gas line basically, and the detection reliability is high.

In one embodiment of the present invention, the gas line detection process is performed by a gas line detection apparatus, and the gas line detection apparatus includes:

the laser emitter is used for emitting fan-shaped laser perpendicular to the optical fiber;

the receiving frame and the laser transmitter are respectively positioned on two sides of the optical fiber;

and the laser receivers are arranged on the receiving frame side by side and are used for receiving the fan-shaped laser.

In one embodiment of the present invention, a surface of the receiving frame facing the laser transmitter is an arc surface, and the laser receiver is mounted on the arc surface.

The arc-shaped surface is arranged, so that when the part of the fan-shaped laser which does not pass through the optical fiber is received by the receiver, the signal intensity is the same. During actual application, signals of the laser receivers can be drawn through computer software, the horizontal coordinate is the mark number of the laser receivers which are sequentially arranged, the vertical coordinate is signal intensity, the points are connected from left to right, the image drawn in a normal state is a straight line with a concave shape in the middle, and when a gas line appears, the concave part changes suddenly, and the concave amplitude is obviously increased.

In one embodiment of the present invention, the gas line detection apparatus further includes two deviation detection mechanisms, a movement adjustment mechanism and a connection frame, the laser emitter is mounted on the movement adjustment mechanism, and the movement adjustment mechanism is configured to drive the laser emitter to move along a direction perpendicular to the X direction of the optical fiber, and to approach or leave the receiving frame; the connecting frame is used for connecting the laser transmitter and the receiving frame, and the movement adjusting mechanism can drive the laser transmitter and the receiving frame to move synchronously through the connecting frame; two skew detection mechanism are from top to bottom the interval setting, laser emitter and receiving frame are located between two skew detection mechanism, skew detection mechanism includes:

the laser emitting frame assembly is used for emitting a plurality of parallel light rays, the light rays are divided into two groups, the two groups of light rays are respectively positioned on two sides of the optical fiber, the light rays are perpendicular to the optical fiber, and the light rays are perpendicular to the X direction;

the laser receiving frame assembly is used for receiving the light of the laser emitting frame assembly.

In the production process, the skew probably appears in optic fibre, can influence the signal that laser receiver received when optic fibre is kept away from or is close to laser emitter, can detect this skew through setting up two skew detection mechanism that the interval set up from top to bottom, and the detection principle is: the distance between two adjacent light rays is determined, when the optical fiber is deviated to shield one of the light rays, the laser receiving rack assembly can detect the optical fiber, and the optical fiber is determined to move to the position corresponding to the light ray.

The offset detection mechanism of top can detect optic fibre along the first skew of perpendicular to light direction, and the offset detection mechanism of below can detect optic fibre along the second skew of perpendicular to light direction, and vertical position through top offset detection mechanism, the vertical position of below offset detection mechanism, first skew, second skew and laser emitter's vertical position can calculate the distance that laser emitter needs to adjust, then carries out accurate control through offset detection mechanism.

In one embodiment of the present invention, the connection frame is annular or arc-shaped to prevent interference with the optical fiber.

In one embodiment of the present invention, the movement adjusting mechanism includes:

a base;

the sliding rod is fixed on the base;

the screw rod is rotatably arranged on the base and is parallel to the sliding rod;

the adjusting block is provided with a sliding hole and a threaded hole, the sliding rod penetrates through the sliding rod, the screw rod penetrates through the threaded hole and is meshed with the threaded hole, and the laser emitter is fixed on the adjusting block;

and the driving motor is arranged on the base and is used for driving the screw rod to rotate accurately.

In one embodiment of the present invention, the melting process comprises: melting the optical fiber preform at 2200-2300 ℃, and drawing the fiber depending on self gravity;

the cooling process comprises the following steps: the drooping optical fiber is cooled and shaped through an optical fiber cooling device and then is further cooled through a cooling pipe.

In one embodiment of the present invention, the coating and curing process includes:

primary coating procedure: applying a resin to an outer surface of the optical fiber by a coating device to form a primary coating layer;

a primary curing process: curing the primary coating layer by the optical fiber through ultraviolet curing equipment;

a secondary coating procedure: coating resin on the outer surface of the primary coating layer by a coating device to form a secondary coating layer;

a secondary curing process: and (3) enabling the optical fiber to pass through ultraviolet curing equipment to cure the secondary coating.

In one embodiment of the present invention, the coating and curing process includes:

primary coating procedure: applying a resin to an outer surface of the optical fiber by a coating device to form a primary coating layer;

a secondary coating procedure: coating resin on the outer surface of the primary coating layer by a coating device to form a secondary coating layer;

a curing process: and the optical fiber passes through ultraviolet curing equipment to cure the primary coating layer and the secondary coating layer.

The invention has the beneficial effects that: the processing technology of this application optic fibre is through setting up extra gas line and detecting the appearance position and the final position that the process can the on-line measuring gas line, has both made things convenient for the later stage to handle the gas line section, can control rolling equipment reduction rolling speed when detecting out the gas line again, reduces the tension of optic fibre, prevents that optic fibre from leading to the fracture because of the gas line.

Description of the drawings:

FIG. 1 is a schematic view of a gas line detection process;

FIG. 2 is a schematic view of a laser transmitter and receiving gantry;

FIG. 3 is a top view of the deflection sensing mechanism;

fig. 4 is a schematic view of the movement adjusting mechanism.

The figures are numbered:

1. an optical fiber; 2. a laser transmitter; 3. fan-shaped laser; 4. a receiving rack; 5. a laser receiver; 6. an arc-shaped surface; 7. a connecting frame; 8. a movement adjustment mechanism; 9. an offset detection mechanism; 10. a laser emitter frame assembly; 11. light rays; 12. a laser receiver frame assembly; 13. a base; 14. a slide bar; 15. a screw rod; 16. an adjusting block; 17. a slide hole; 18. a threaded hole; 19. a drive motor; 20. a coating device; 21. and (7) cooling the tube.

The specific implementation mode is as follows:

the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the optical fiber processing technology comprises a melting process, a cooling process, a coating solidification process and a winding process, wherein an air line detection process is further arranged between the cooling process and the coating solidification process, and comprises the following steps:

1) the method comprises the steps that fan-shaped laser 3 perpendicular to an optical fiber 1 is emitted to the optical fiber 1 through a laser emitter 2 and received through a plurality of laser receivers 5 arranged side by side, the laser receivers 5 receive the fan-shaped laser 3 and generate light intensity signals, and the signal intensity of at least one laser receiver 5 positioned in the middle is weak;

2) when the signal intensity of at least one laser receiver 5 positioned in the middle is suddenly changed, judging that the optical fiber 1 has a gas line, recording the initial position of the gas line, and controlling the winding device to reduce the winding speed;

3) when the intensity of the signal received by the laser receiver 5 is recovered, judging that the optical fiber 1 has no air line, recording the end position of the air line, and recovering the winding speed of the winding device after the air line section of the optical fiber 1 is completely wound on the winding disc.

The processing technology of this application optic fibre is through setting up extra gas line and detecting the appearance position and the final position that the process can the on-line measuring gas line, has both made things convenient for the later stage to handle the gas line section, can control rolling equipment reduction rolling speed when detecting out the gas line again, reduces optic fibre 1's tension, prevents that optic fibre 1 from leading to the fracture because of the gas line.

The application detects the principle of gas line: the laser transmitter 2 transmits fan-shaped laser 3 perpendicular to the optical fiber 1, a small part of the fan-shaped laser 3 passes through the optical fiber 1 and then is received by the laser receiver 5, because of the effect of the optical fiber 1, the signal intensity of at least one laser receiver 5 in the middle is weak, when the optical fiber 1 generates a gas line, the gas line can influence the propagation of the fan-shaped laser 3 entering the optical fiber 1, and finally the intensity of the laser entering the laser receiver 5 is greatly changed, for example, the intensity is greatly reduced, namely when the signal of at least one laser receiver 5 in the middle is lower than a preset value, the optical fiber 1 is judged to generate the gas line; when the intensity of the laser receiver 5 is restored, it is judged that there is no gas line in the optical fiber 1. Because of being fan-shaped laser 3, the detection of gas line is basically not influenced by the deviation of optical fiber 1, and the detection reliability is high.

As shown in fig. 1 and 2, in the present embodiment, the gas line detection process is performed by a gas line detection apparatus including:

the laser emitter 2 is used for emitting fan-shaped laser 3 perpendicular to the optical fiber 1;

the receiving frame 4, the receiving frame 4 and the laser emitter 2 are respectively positioned at two sides of the optical fiber 1;

and the laser receivers 5 are arranged on the receiving frame 4 side by side and used for receiving the fan-shaped laser 3.

As shown in fig. 2, in the present embodiment, a surface of the receiving frame 4 facing the laser transmitter 2 is an arc surface 6, and the laser receiver 5 is mounted on the arc surface 6.

The provision of the curved surface 6 enables the fan-shaped laser light 3 to be received by the receiver without passing through the portion of the optical fibre 1, with the same signal strength. During actual application, signals of the laser receivers 5 can be drawn through computer software, the abscissa is the mark number of the laser receivers 5 which are sequentially arranged, the ordinate is signal intensity, all points are connected from left to right, an image drawn in a normal state is a straight line with a concave shape in the middle, and when a gas line appears, the concave part changes suddenly, and the concave amplitude is obviously increased.

As shown in fig. 1, 3 and 4, in this embodiment, the gas line detection apparatus further includes two deviation detection mechanisms 9, a movement adjustment mechanism 8 and a connection frame 7, the laser emitter 2 is mounted on the movement adjustment mechanism 8, and the movement adjustment mechanism 8 is configured to drive the laser emitter 2 to move along an X direction perpendicular to the optical fiber 1, and to approach or leave the receiving frame 4; the connecting frame 7 is used for connecting the laser emitter 2 and the receiving frame 4, and the adjusting mechanism 8 can be moved through the connecting frame 7 to drive the laser emitter 2 and the receiving frame 4 to move synchronously; two skew detection mechanism 9 are from top to bottom the interval setting, and laser emitter 2 and receiving frame 4 are located between two skew detection mechanism 9, and skew detection mechanism 9 includes:

the laser emitting frame assembly 10 is used for emitting a plurality of parallel light rays 11, the light rays 11 are divided into two groups, the two groups of light rays 11 are respectively positioned at two sides of the optical fiber 1, the light rays 11 are vertical to the optical fiber 1, and the light rays 11 are vertical to the X direction;

and a laser receiving frame assembly 12 for receiving the light 11 from the laser emitting frame assembly 10.

In the production process, the optical fiber 1 may have a deviation, when the optical fiber 1 is far away from or close to the laser emitter 2, the signal received by the laser receiver 5 is affected, the deviation can be detected by two deviation detection mechanisms 9 arranged at an upper and lower interval, and the detection principle is as follows: the distance between two adjacent light rays 11 is determined, when the optical fiber 1 is deviated to block one of the light rays 11, the laser receiving rack assembly 12 can detect the deviation, and the optical fiber 1 is determined to move to the position corresponding to the light ray 11.

The upper deviation detection mechanism 9 can detect first deviation of the optical fiber 1 in the direction perpendicular to the light ray 11, the lower deviation detection mechanism 9 can detect second deviation of the optical fiber 1 in the direction perpendicular to the light ray 11, the distance required to be adjusted of the laser emitter 2 can be calculated through the vertical position of the upper deviation detection mechanism 9, the vertical position of the lower deviation detection mechanism 9, the first deviation, the second deviation and the vertical position of the laser emitter 2, and then accurate control is carried out through the deviation detection mechanism 9.

As shown in fig. 2, in the present embodiment, the connecting frame 7 has a ring shape or an arc shape in order to prevent interference with the optical fiber 1.

As shown in fig. 4, in the present embodiment, the movement adjusting mechanism 8 includes:

a base 13;

a slide bar 14 fixed on the base 13;

the screw rod 15 is rotatably arranged on the base 13 and is parallel to the sliding rod 14;

the adjusting block 16 is provided with a sliding hole 17 and a threaded hole 18, the sliding rod 14 penetrates through the sliding rod 14, the screw rod 15 penetrates through the threaded hole 18 and is meshed with the threaded hole 18, and the laser emitter 2 is fixed on the adjusting block 16;

and the driving motor 19 is arranged on the base 13 and is used for driving the screw rod 15 to rotate accurately.

In this embodiment, the melting process is: melting the prefabricated rod of the optical fiber 1 at 2200-2300 ℃, and drawing the prefabricated rod by means of self gravity;

the cooling process comprises the following steps: the drooping optical fiber 1 is firstly cooled and shaped by the optical fiber 1 cooling device and then is further cooled by the cooling pipe 21.

In this embodiment, the coating and curing process includes:

primary coating procedure: applying a resin to the outer surface of the optical fiber 1 by the coating device 20 to form a primary coating layer;

a primary curing process: the optical fiber 1 passes through ultraviolet light curing equipment to cure the primary coating layer;

a secondary coating procedure: applying a resin on an outer surface of the primary coating layer by the coating device 20 to form a secondary coating layer;

a secondary curing process: the optical fiber 1 passes through an ultraviolet curing device to cure the secondary coating layer.

In other embodiments, the coating and curing process may include:

primary coating procedure: applying a resin to the outer surface of the optical fiber 1 by the coating device 20 to form a primary coating layer;

a secondary coating procedure: applying a resin on an outer surface of the primary coating layer by the coating device 20 to form a secondary coating layer;

a curing process: the optical fiber 1 passes through an ultraviolet curing device to cure the primary coating layer and the secondary coating layer.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.