CN111812775A - Special optical fiber parameter detection fusion splicing device and method - Google Patents
Special optical fiber parameter detection fusion splicing device and method Download PDFInfo
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- CN111812775A CN111812775A CN202010649394.9A CN202010649394A CN111812775A CN 111812775 A CN111812775 A CN 111812775A CN 202010649394 A CN202010649394 A CN 202010649394A CN 111812775 A CN111812775 A CN 111812775A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2553—Splicing machines, e.g. optical fibre fusion splicer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2555—Alignment or adjustment devices for aligning prior to splicing
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Abstract
The invention discloses a special optical fiber parameter detection fusion device and a method, belonging to the technical field of optical fibers. The invention can be applied to parameter detection and fusion processing of large-core optical fibers, polarization maintaining optical fibers, small-diameter optical fibers, single-mode optical fibers and other types of optical fibers, and has the advantages of multiple types of applicable optical fibers, high detection speed, simple operation and the like.
Description
Technical Field
The invention belongs to the technical field of optical fibers, and particularly relates to a special optical fiber parameter detection fusion splicing device and method.
Background
The special optical fiber is different from the conventional communication optical fiber, has special performance and application, has special structure, material, process, transmission wavelength and optical performance, and serves different industry fields. Common special optical fibers comprise large-core optical fibers, polarization maintaining optical fibers, double-clad optical fibers, erbium-doped optical fibers, small-diameter optical fibers, photonic crystal optical fibers and the like, and are widely applied to various fields such as laser, sensing, electric power, medical treatment, military and the like.
In the production process of special optical fibers and optical fiber devices, it is usually necessary to detect parameters such as the diameter of the cladding of the optical fiber, the end face angle, the type of the optical fiber, and the like, and perform high-precision alignment and low-loss fusion splicing on the optical fiber. At present, most of optical fiber parameter detection and fusion splicing processing devices in the industry are separated products, the problems of single function, complex use, low working efficiency and the like exist, and the requirements of special optical fiber parameter detection and fusion splicing processing such as large-core optical fibers, polarization maintaining optical fibers and the like cannot be met aiming at common communication optical fibers with cladding diameters ranging from 80 micrometers to 150 micrometers. Therefore, in order to overcome the defects in the prior art, it is necessary to provide a special optical fiber parameter detection and fusion splicing processing device with complete functions and simple operation.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides the special optical fiber parameter detection fusion welding device and method, which are reasonable in design, overcome the defects of the prior art and have good effects.
In order to achieve the purpose, the invention adopts the following technical scheme:
a special optical fiber parameter detection fusion splicing device comprises an illuminating lamp X direction, an illuminating lamp Y direction, a left side movement mechanism, a left side optical fiber, a left side clamp, a front electrode rod, a rear electrode rod, a right side clamp, a right side optical fiber, a right side movement mechanism, a high-voltage discharge module, an image acquisition module X direction, an image acquisition module Y direction, a control module and an upper computer;
an illumination lamp X-direction and an illumination lamp Y-direction configured for fiber optic imaging illumination;
the image acquisition module X direction and the image acquisition module Y direction are configured for carrying out optical fiber imaging amplification and generating digital optical fiber image data;
a left clamp and a right clamp configured to clamp and fix an optical fiber; the left clamp is fixed on the left moving mechanism, and the right clamp is fixed on the right moving mechanism; the left side movement mechanism and the right side movement mechanism are configured to be used for driving the clamp to realize axial propulsion, X-direction radial adjustment, Y-direction radial adjustment and rotary motion;
front and rear electrode rods configured to produce arc-fused optical fibers; the front electrode bar and the rear electrode bar are both connected with the high-voltage discharge module;
a high voltage discharge module configured to generate a high voltage discharge signal;
the control module is respectively connected with the X direction of the illuminating lamp, the Y direction of the illuminating lamp, the X direction of the image acquisition module, the Y direction of the image acquisition module, the left side movement mechanism, the right side movement mechanism, the high-voltage discharge module and the upper computer, is configured to control the X direction of the illuminating lamp, the Y direction of the illuminating lamp, the left side movement mechanism, the right side movement mechanism and the high-voltage discharge module, preprocesses the optical fiber image data and sends the preprocessed optical fiber image data to the upper computer;
the upper computer is configured to be used for displaying the optical fiber image in real time, determining the diameter of an optical fiber cladding, the end face angle and the type of the optical fiber according to the optical fiber image data, and also sending a control signal to the control module to realize high-precision alignment and low-loss fusion of the optical fibers on the left side and the right side.
Preferably, the light emitting wavelength of the illuminating lamp in the X direction and the light emitting wavelength of the illuminating lamp in the Y direction are 620 nm-650 nm, the brightness can be adjusted through the control module, and the condition that the brightness of a fiber core of the optical fiber exceeds the saturation of an image sensor in the image acquisition module is avoided;
preferably, the distance adjustment range between the front electrode rod and the rear electrode rod is 1 mm-3 mm, the height adjustment range of the front electrode rod and the rear electrode rod relative to the optical fiber is-0.3 mm- +0.3mm (the central position of the optical fiber is 0), and the low-loss fusion welding requirement of the optical fibers such as the large-core optical fiber, the small-diameter optical fiber, the single-mode optical fiber and the like can be met.
Preferably, the control module and the upper computer communicate with each other through a USB cable or a network cable.
In addition, the invention also provides a special optical fiber parameter detection fusion welding method, which adopts the special optical fiber parameter detection fusion welding device, and comprises the special optical fiber parameter detection method and the fusion welding method; the special optical fiber parameter detection method specifically comprises the following steps:
step S11: placing the optical fiber to be tested into a left clamp, and illuminating in the X direction and the Y direction by an illuminating lamp to form optical fiber illumination;
step S12: generating digital optical fiber image data in the X direction and the Y direction of the image acquisition module;
step S13: the control module is used for preprocessing the digital optical fiber image data including image gray value transformation, noise reduction and non-uniformity correction and then sending the preprocessed digital optical fiber image data to an upper computer;
step S14: a user clicks a 'parameter test' button in an upper computer interface, the upper computer firstly obtains the number of column pixels occupied by the fiber cladding according to the collected fiber image, and the cladding diameter of the fiber is calculated according to the actual physical distance corresponding to a single pixel; distinguishing optical fibers with different core diameters through the diameter of the cladding; then calculating an optical fiber end face angle by using an optical fiber contour acquisition algorithm; acquiring the gray value of the image data of the optical fiber array, analyzing the characteristic parameter of the gray curve, and extracting the characteristic parameter of the gray curve; finally, determining the type of the optical fiber according to the characteristic parameters;
the welding method specifically comprises the following steps:
step S21: respectively placing two optical fibers to be processed into a left clamp and a right clamp;
step S22: clicking an alignment button in an upper computer interface, and controlling a left side movement mechanism and a right side movement mechanism by a control module to finish horizontal pushing, X-direction radial adjustment, Y-direction radial adjustment and rotary alignment of the optical fibers;
step S23: clicking a 'welding' button in an interface of an upper computer, controlling a high-voltage discharge module to generate a high-voltage discharge signal by a control module, generating an arc heating optical fiber between a front electrode rod and a rear electrode rod, preheating the optical fiber for a period of time according to program set parameters, controlling a left movement mechanism and a right movement mechanism to simultaneously push the optical fiber by the control module, heating the optical fiber according to the set parameters by the arc between the front electrode rod and the rear electrode rod, and finishing low-loss welding of the optical fiber after discharging.
Preferably, the different-core optical fiber includes a large-core optical fiber, a small-core optical fiber, and a normal-diameter optical fiber.
The invention has the following beneficial technical effects:
the optical fiber to be detected is placed in the optical fiber clamp, the illuminating lamp emits light to illuminate the optical fiber to be detected, digital optical fiber image data are generated in the image acquisition module, and the image data are sent to the upper computer after being preprocessed by the control module. After a user clicks menus such as 'parameter test', 'alignment', 'welding' and the like in an interface by the upper computer according to needs, the device can be controlled to realize corresponding functions, and detection data are displayed. The invention integrates the functions of optical fiber parameter detection and optical fiber alignment and fusion splicing, is suitable for various special optical fibers such as large-core optical fibers with the cladding diameter range of 60-500 mu m, polarization maintaining optical fibers and the like, and provides a detection algorithm based on the gray curve characteristic parameters of optical fiber images. The detection algorithm can quickly and accurately detect the cladding diameter, the end face quality and the optical fiber type of the optical fiber to be detected. The invention has the advantages of multiple types of applicable optical fibers, high detection precision, high speed, low fusion loss, low production cost and the like. In the use process, parameter detection and alignment fusion can be automatically completed through simple menu operation, complex manual adjustment is not needed, and the operation is simple and convenient.
Drawings
Fig. 1 is a schematic block diagram of the apparatus of the present invention.
FIG. 2 is a schematic diagram of the position of a fiber optic imaging related module.
FIG. 3 is a schematic representation of fiber cladding diameter and end face angle.
FIG. 4 is a graph showing the correspondence between fiber images and gray scale values.
FIG. 5 is a flow chart of fiber parameter detection.
Wherein, 1-X direction of the illuminating lamp; 2-Y direction of illuminating lamp; 3-a left side movement mechanism; 4-left side fiber; 5-left clamp; 6-front electrode bar; 7-rear electrode bar; 8-right clamp; 9-right side fiber; 10-right side motion mechanism; 11-a high voltage discharge module; 12-image acquisition module X direction; 13-image capture module Y direction; 14-a control module; 15-an upper computer.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
the embodiment of the invention provides a special optical fiber parameter detection and fusion device, which comprises an illuminating lamp X-direction 1, an illuminating lamp Y-direction 2, a left side movement mechanism 3, a left side optical fiber 4, a left side clamp 5, a front electrode rod 6, a rear electrode rod 7, a right side clamp 8, a right side optical fiber 9, a right side movement mechanism 10, a high voltage discharge module 11, an image acquisition module X-direction 12, an image acquisition module Y-direction 13, a control module 14 and an upper computer 15, wherein the illuminating lamp Y-direction 2, the left side movement mechanism 3, the left side optical fiber 4, the left.
The illuminating lamp X-direction 1 and the illuminating lamp Y-direction 2 are used for optical fiber imaging illumination, the light emitting wavelength is 620-650 nm, and the illumination brightness can be adjusted through the control module 14; the image acquisition modules X to 12 and the image acquisition modules Y to 13 are used for optical fiber imaging amplification and generate digital optical fiber image data.
The installation positions of the illuminating lamps X to 1 and the illuminating lamps Y to 2 are mutually vertical, the installation positions of the image acquisition modules X to 12 and the installation positions of the image acquisition modules Y to 13 are mutually vertical, and the position relation of the optical fiber imaging related modules is shown in figure 2.
The left clamp 5 and the right clamp 8 are used for clamping and fixing optical fibers, the left clamp 5 is fixed on the left movement mechanism 3, and the right clamp 8 is fixed on the right movement mechanism 10; the left movement mechanism 3 and the right movement mechanism 10 are used for driving the clamp to realize axial propulsion, X-direction radial adjustment, Y-direction radial adjustment and rotary motion.
The front electrode bar 6 and the rear electrode bar 7 are used for generating arc welding optical fibers; the front electrode rod 6 and the rear electrode rod 7 are connected with the high-voltage discharge module 11, and the high-voltage discharge module 11 is used for generating a high-voltage discharge signal.
The control module 14 respectively with light X to 1, light Y to 2, image acquisition module X to 12, image acquisition module Y to 13, left side motion 3, right side motion 10, high voltage discharge module 11 and host computer 15 are connected for control light X to, light Y to, left side motion, right side motion and high voltage discharge module to send host computer 15 after analyzing and handling optic fibre image data. Specifically, the control module 14 communicates with the upper computer 15 through a USB cable or a network cable.
The upper computer 15 is used for displaying the optical fiber image in real time, determining the diameter of an optical fiber cladding, the end face angle and the type of the optical fiber according to the optical fiber image data, and sending a control signal to the control module 14 to realize high-precision alignment and low-loss fusion of the optical fibers on the left side and the right side.
FIG. 3 is a schematic representation of fiber cladding diameter and end face angle. Since the fiber imaging is performed by using a core direct view method, portions a-b and c-d in the figure represent the gray scale of the cladding portion of the fiber, and portions b-c represent the gray scale of the core portion of the fiber. It can be known from the figure that a complete optical fiber has four gray scale drastic change points a, b, c and d, when an end face angle is calculated, the query is carried out from top to bottom by taking a threshold gray scale value as a reference, four boundary points, namely a, b, c and d, can be found under the condition that the complete optical fiber exists, and the interval of each point is a fixed value. Once the fiber is found to have the end face angle, the a-d interval is reduced, or the number of edge points found is less than four, and the search is carried out until the number of edge points is zero. The number of points where the edges of the optical fiber are abnormal is denoted by x, and since the diameter y of the optical fiber is constant, the end face angle θ of the optical fiber can be obtained by equation (1).
θ＝tan-1(x/y) (1)；
FIG. 4 is a graph showing the relationship between the fiber image and the gray scale value. In the figure, a is the peak of the curve, b is the trough of the curve, c is the inflection point of the curve, x is the height of the peak, and y is the height of the trough. There are 3 peaks, 2 troughs and 4 inflection points in fig. 4. The fiber core areas in the different types of optical fiber images have different characteristics, and characteristic parameters can be extracted according to the gray curve of the fiber core images. The characteristic parameters in the gray curve comprise the number of inflection points, the number of wave crests, the number of wave troughs, the width ratio and the height ratio between the wave crests in the curve. Different types of special optical fibers can be distinguished according to different cladding diameters, fiber core diameters and different characteristic parameters in the gray scale curve.
The specific process of detecting the optical fiber parameters is as follows: the optical fiber to be detected is placed in the left clamp 5, the illuminating lamp X emits light to the left clamp 1 and the illuminating lamp Y emits light to the right clamp 2 to form optical fiber illumination, digital optical fiber image data are generated in the image acquisition modules X to 12 and the image acquisition modules Y to 13, and the digital optical fiber image data are sent to the upper computer 15 after being preprocessed by the control module 14 (including image gray value transformation, noise reduction and non-uniformity correction). A user clicks a 'parameter test' button in an interface of the upper computer 15, the upper computer 15 firstly obtains the number of column pixels occupied by the fiber cladding according to the collected fiber image, calculates the cladding diameter of the fiber according to the actual physical distance corresponding to a single pixel, and can distinguish the detection fiber into specific categories of a large-core-diameter fiber, a small-diameter fiber and a common-diameter fiber through the cladding diameter; then calculating an optical fiber end face angle by using an optical fiber contour acquisition algorithm; and finally, acquiring the gray value of the image data of the optical fiber array, extracting characteristic parameters of a gray curve, and performing related operation analysis on the characteristic parameters and special optical fiber characteristic libraries such as standard large-core optical fibers, polarization maintaining optical fibers and the like in a memory of the upper computer 15 to determine the type of the optical fiber to be detected. The flow is shown in fig. 5.
The specific processes of high-precision alignment and low-loss fusion of the optical fibers are as follows: two optical fibers to be processed are respectively placed into the left clamp 5 and the right clamp 8, an alignment button in an interface of the upper computer 15 is clicked, and the control module 14 controls the left movement mechanism 3 and the right movement mechanism 10 to complete horizontal pushing, X-direction radial adjustment, Y-direction radial adjustment and rotary alignment of the optical fibers. Clicking a 'welding' button in an interface of an upper computer 15, controlling a high-voltage discharge module 11 to generate a high-voltage discharge signal by a control module 14, generating an arc heating optical fiber between a front electrode rod 6 and a rear electrode rod 7, preheating the optical fiber for a period of time according to program set parameters, controlling a left movement mechanism 3 and a right movement mechanism 10 to simultaneously push the optical fiber by the control module 14, heating the optical fiber by the arc between the front electrode rod 6 and the rear electrode rod 7 according to the set parameters, and finishing low-loss welding of the optical fiber after discharging.
The invention integrates the functions of optical fiber parameter detection and optical fiber alignment and fusion splicing, is suitable for the diameter range of an optical fiber cladding of 60-500 mu m, completes optical fiber parameter detection within 5 seconds, has the diameter detection precision of 0.5 mu m and the end face angle detection precision of 0.1 degrees, and can identify the types of optical fibers such as large-core optical fibers, polarization-maintaining optical fibers, single-mode optical fibers and the like, and the types of optical fibers comprise large-core optical fibers, polarization-maintaining optical fibers, double-cladding optical fibers, small-diameter optical fibers, erbium-doped optical fibers, photonic crystal optical fibers, single-mode optical fibers and the like; the optical fiber alignment and low-loss fusion can be completed within 20 seconds, the optical fiber alignment precision is 0.1 mu m, and the fusion loss of the polarization maintaining optical fiber and the large-core optical fiber is not more than 0.05 dB.
At present, optical fiber parameter detection devices and alignment fusion splicing devices in the industry are mostly separated products, and are generally only suitable for single-mode optical fibers and multi-mode optical fibers with cladding diameters ranging from 80 micrometers to 150 micrometers. In addition, when the optical fiber alignment device is used, the optical fiber to be detected is only needed to be placed into the clamp, parameter detection and alignment fusion can be automatically completed through simple menu operation, complex manual adjustment is not needed, and the optical fiber alignment device has the advantages of simplicity in operation and good consistency.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (6)
1. The utility model provides a special type optical fiber parameter detection butt fusion device which characterized in that: the device comprises an illuminating lamp X direction, an illuminating lamp Y direction, a left side movement mechanism, a left side optical fiber, a left side clamp, a front electrode bar, a rear electrode bar, a right side clamp, a right side optical fiber, a right side movement mechanism, a high-voltage discharge module, an image acquisition module X direction, an image acquisition module Y direction, a control module and an upper computer;
an illumination lamp X-direction and an illumination lamp Y-direction configured for fiber optic imaging illumination;
the image acquisition module X direction and the image acquisition module Y direction are configured for carrying out optical fiber imaging amplification and generating digital optical fiber image data;
a left clamp and a right clamp configured to clamp and fix an optical fiber; the left clamp is fixed on the left moving mechanism, and the right clamp is fixed on the right moving mechanism; the left side movement mechanism and the right side movement mechanism are configured to be used for driving the clamp to realize axial propulsion, X-direction radial adjustment, Y-direction radial adjustment and rotary motion;
front and rear electrode rods configured to produce arc-fused optical fibers; the front electrode bar and the rear electrode bar are both connected with the high-voltage discharge module;
a high voltage discharge module configured to generate a high voltage discharge signal;
the control module is respectively connected with the X direction of the illuminating lamp, the Y direction of the illuminating lamp, the X direction of the image acquisition module, the Y direction of the image acquisition module, the left side movement mechanism, the right side movement mechanism, the high-voltage discharge module and the upper computer, is configured to control the X direction of the illuminating lamp, the Y direction of the illuminating lamp, the left side movement mechanism, the right side movement mechanism and the high-voltage discharge module, preprocesses the optical fiber image data and sends the preprocessed optical fiber image data to the upper computer;
the upper computer is configured to be used for displaying the optical fiber image in real time, determining the diameter of an optical fiber cladding, the end face angle and the type of the optical fiber according to the optical fiber image data, and also sending a control signal to the control module to realize high-precision alignment and low-loss fusion of the optical fibers on the left side and the right side.
2. A specialty fiber optic parameter sensing fusion splice device as claimed in claim 1, wherein: the light emitting wavelength of the illuminating lamp in the X direction and the light emitting wavelength of the illuminating lamp in the Y direction are 620 nm-650 nm, the brightness can be adjusted through the control module, and the fact that the brightness of the fiber core of the optical fiber exceeds the saturation of an image sensor in the image acquisition module is avoided.
3. A specialty fiber optic parameter sensing fusion splice device as claimed in claim 1, wherein: the adjusting range of the distance between the front electrode bar and the rear electrode bar is 1 mm-3 mm, the central position of the optical fiber is 0, and the adjusting range of the height of the front electrode bar and the rear electrode bar relative to the optical fiber is-0.3 mm- +0.3 mm.
4. A specialty fiber optic parameter sensing fusion splice device as claimed in claim 1, wherein: the control module is communicated with the upper computer through a USB cable or a network cable.
5. A special optical fiber parameter detection fusion splicing method is characterized in that: the special optical fiber parameter detection fusion-splicing device according to claim 1, comprising a special optical fiber parameter detection method and a fusion-splicing method; the special optical fiber parameter detection method specifically comprises the following steps:
step S11: placing the optical fiber to be tested into a left clamp, and illuminating in the X direction and the Y direction by an illuminating lamp to form optical fiber illumination;
step S12: generating digital optical fiber image data in the X direction and the Y direction of the image acquisition module;
step S13: the control module is used for preprocessing the digital optical fiber image data including image gray value transformation, noise reduction and non-uniformity correction and then sending the preprocessed digital optical fiber image data to an upper computer;
step S14: a user clicks a 'parameter test' button in an upper computer interface, the upper computer firstly obtains the number of column pixels occupied by the fiber cladding according to the collected fiber image, and the cladding diameter of the fiber is calculated according to the actual physical distance corresponding to a single pixel; distinguishing optical fibers with different core diameters through the diameter of the cladding; then calculating an optical fiber end face angle by using an optical fiber contour acquisition algorithm; acquiring the gray value of the image data of the optical fiber array, analyzing the characteristic parameter of the gray curve, and extracting the characteristic parameter of the gray curve; finally, determining the type of the optical fiber according to the characteristic parameters;
the welding method specifically comprises the following steps:
step S21: respectively placing two optical fibers to be processed into a left clamp and a right clamp;
step S22: clicking an alignment button in an upper computer interface, and controlling a left side movement mechanism and a right side movement mechanism by a control module to finish horizontal pushing, X-direction radial adjustment, Y-direction radial adjustment and rotary alignment of the optical fibers;
step S23: clicking a 'welding' button in an interface of an upper computer, controlling a high-voltage discharge module to generate a high-voltage discharge signal by a control module, generating an arc heating optical fiber between a front electrode rod and a rear electrode rod, preheating the optical fiber for a period of time according to program set parameters, controlling a left movement mechanism and a right movement mechanism to simultaneously push the optical fiber by the control module, heating the optical fiber according to the set parameters by the arc between the front electrode rod and the rear electrode rod, and finishing low-loss welding of the optical fiber after discharging.
6. A special optical fiber parameter detection fusion-splicing method according to claim 5, wherein: the optical fibers with different core diameters comprise large-core-diameter optical fibers, small-diameter optical fibers and common-diameter optical fibers.
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| CN112130256A (en) * | 2020-11-06 | 2020-12-25 | 南京天兴通电子科技有限公司 | Novel optical fiber type identification system |
| CN112444959A (en) * | 2020-11-20 | 2021-03-05 | 中电科仪器仪表(安徽)有限公司 | Device and method for processing optical fiber image ghost |
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| CN208188398U (en) * | 2018-04-27 | 2018-12-04 | 深圳市中为光通信技术有限公司 | A kind of optical fiber fusion splice system |
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| JP2010117600A (en) * | 2008-11-13 | 2010-05-27 | Furukawa Electric Co Ltd:The | Fusion splicer, and connection control method for fusion splicer |
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Application publication date: 20201023 |
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| RJ01 | Rejection of invention patent application after publication |