CN109445029B - High-energy discharge fusion device and method for large-core-diameter optical fiber - Google Patents
High-energy discharge fusion device and method for large-core-diameter optical fiber Download PDFInfo
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- CN109445029B CN109445029B CN201811522294.9A CN201811522294A CN109445029B CN 109445029 B CN109445029 B CN 109445029B CN 201811522294 A CN201811522294 A CN 201811522294A CN 109445029 B CN109445029 B CN 109445029B
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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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Abstract
The invention discloses a high-energy discharge fusion device and method for a large-core optical fiber, and particularly relates to the technical field of optical fiber fusion. It has solved current welding set electrode fixed, when carrying out the butt fusion to big core footpath optic fibre, the butt fusion effect can't guarantee even the not enough of butt fusion. The large-core-diameter optical fiber high-energy discharge fusion splicing device comprises two electrodes which are symmetrically arranged on the left and right, an optical fiber channel is formed between the two electrodes, an electrode fixing structure is connected onto each electrode, a distance sensor reference surface is arranged on the electrode fixing structure, a distance sensor is arranged right in front of the distance sensor reference surface and is connected with a CPU through an A/D (analog/digital) conversion circuit, the CPU drives the electrode fixing structure through a stepping motor and a micrometer head, one electrode is connected with a high-voltage discharge control circuit through a high-voltage cable, the output end of the high-voltage discharge control circuit is connected with a high-voltage bag, the output end of the high-voltage bag is connected with the other electrode through another high-voltage cable, and the high-voltage discharge.
Description
Technical Field
The invention relates to the technical field of optical fiber fusion, in particular to a high-energy discharge fusion device and method for large-core optical fibers.
Background
With the continuous progress of fiber laser technology, the use of large-core fiber for laser energy transmission has been widely used in laser weaponry, laser cutting, laser welding, laser medical treatment, and the like. In the development and production processes of optical fiber laser equipment, a special fusion splicer is usually needed to complete low-loss fusion splicing of large-core-diameter optical fibers, and the reliability of the laser equipment is directly influenced by the fusion splicing quality of a splicing point.
The size of the discharge arc directly influences the connection quality of the large-core-diameter optical fiber, the electrode distance needs to be accurately adjusted according to the diameter of a cladding when the optical fiber is welded, the discharge energy needs to be selected according to different core diameters, and otherwise, the connection quality of the optical fiber is influenced.
At present, the electrodes of a common optical fiber fusion splicer are fixed and cannot be adjusted, the discharge output power can only be changed when optical fibers with different diameters are fused, and the diameter range of the applicable optical fiber cladding is narrow and can only reach 80-150 microns due to the small distance between the electrode pins and the limited adjustable range of the discharge output power. When carrying out the butt fusion to bigger core footpath optic fibre, the butt fusion effect can't guarantee or even unable butt fusion.
Disclosure of Invention
The invention aims to overcome the defects and provides a high-energy discharge welding device and a high-energy discharge welding method for large-core optical fibers, which can accurately adjust the distance between electrodes and meet the requirements of welding in different ranges of fiber cladding diameters.
The invention specifically adopts the following technical scheme:
the utility model provides a big core diameter optic fibre high energy butt fusion device that discharges, including left and right two electrodes that the symmetry set up, form an optical fiber channel between two electrodes, connect electrode fixed knot structure on every electrode, be equipped with distance sensor reference surface on the electrode fixed knot structure, distance sensor sets up distance sensor directly in front of distance sensor reference surface, distance sensor passes through AD converting circuit and connects CPU, CPU drives electrode fixed knot structure through step motor and micrometer head, one of them electrode passes through high-voltage cable and connects high-voltage discharge control circuit, high-voltage discharge control circuit's output connects the high-voltage package, the output of high-voltage package passes through another high-voltage cable and connects another electrode, high-voltage discharge control circuit receives the signal that CPU sent.
Preferably, the control end of the stepping motor is connected to the CPU, the stepping motor drives the dividing head to convert the rotary motion into linear motion through the gear, and then the electrode fixing structure is controlled to drive the two electrodes to move.
A high-energy discharge welding method for large-core optical fibers adopts the high-energy discharge welding device for the large-core optical fibers, and when the optical fibers with different core diameters are placed, the distance between the tips of electrode needles is accurately adjusted to match the change of the distance between the tips of the electrode needles;
in order to realize the adjustment of the electrode needle spacing when the optical fibers with different core diameters are welded, the characteristic values corresponding to the optical fibers with different core diameters are calculated firstly, the motor is controlled according to the characteristic values to adjust the electrode spacing, and the distance D between the reference surface of the distance sensor and the induction surface of the distance sensor is selectedTAs a characteristic value, DTCalculated according to the formula (1),
DFthe distance of the optical fiber axis relative to the upper surface of the sensor is calculated according to the formula (2):
DEdistance between tips of two electrodes, D0Is the distance between the electrode tip and the reference surface;
then, according to the one-to-one correspondence relationship between the diameters of the optical fibers and the characteristic values, key options are made and stored in a memory of a peripheral circuit of a CPU (central processing unit), and the distances between the optical fibers with different diameters and different electrodes are adjusted in a key selection mode when the optical fiber is used;
when the diameter of the optical fiber to be fusion spliced is selected, the characteristic value D is determinedTAnd then judging the direction of the driving motor and the distance required to be driven according to the distance between the current distance sensor reference surface and the distance sensor sensing surface.
The invention has the following beneficial effects:
the device enables the electrodes to reach corresponding positions by controlling the stepping motor, so that the distance adjustment of the electrodes is realized; meanwhile, selecting proper discharge parameters aiming at optical fibers with different core diameters; the running direction and the distance of the stepping motor can be calculated according to the distance between the tips of the electrode pins corresponding to the optical fibers with different core diameters, the control precision is as high as 0.4 mu m, the adjusting speed is high, the adjustment can be completed through the stepping motor at one time, too complex calculation is not needed, and high-energy discharge is realized.
Drawings
FIG. 1 is a schematic block diagram of a high-energy discharge fusion apparatus for large-core optical fibers;
FIG. 2 is a schematic diagram showing the spacing between the electrode pins corresponding to fusion splicing of optical fibers of different diameters;
fig. 3 is a diagram of a correlation distance parameter.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in figure 1, the high-energy discharge fusion device for the large-core optical fiber comprises two electrodes which are symmetrically arranged at the left and the right, an optical fiber channel is formed between the two electrodes, an electrode fixing structure is connected on each electrode, a distance sensor reference surface is arranged on the electrode fixing structure, a distance sensor is arranged right in front of the distance sensor reference surface, the distance sensor is connected with a CPU through an A/D conversion circuit, the CPU drives the electrode fixing structure through a stepping motor and a micrometer head, one of the electrodes is connected with a high-voltage discharge control circuit through a high-voltage cable, the output end of the high-voltage discharge control circuit is connected with a high-voltage pack, the output end of the high-voltage pack is connected with the other electrode through another high-voltage cable, the high-voltage discharge control circuit receives a signal sent by a CPU, relevant parameters of the high-voltage pack are provided by the high-voltage discharge control circuit, and switching of different discharge energies is achieved through parameter adjustment.
The control end of the stepping motor is connected with the CPU, the stepping motor drives the dividing head to convert the rotary motion into linear motion through the gear, and then the electrode fixing structure is controlled to drive the two electrodes to move.
As shown in fig. 2 and 3, a large-core optical fiber high-energy discharge fusion welding method adopts the large-core optical fiber high-energy discharge fusion welding device, the device determines the distance from the tip of an electrode needle to a reference surface of a distance sensor and the distance from the center of the tip of the electrode needle to a sensing surface of the distance sensor by calculating the distance between the tip of the electrode needle during certain optical fiber fusion welding, then calculates the functional relationship between the distance from the sensing surface of the distance sensor to the reference surface of the distance sensor and the distance between the tips of the electrode needles, and then controls a stepping motor to enable the electrode to reach the corresponding position, thereby realizing the distance adjustment of the electrode; meanwhile, the proper discharge parameters are selected according to the optical fibers with different core diameters. The distance between the tips of the electrode needles corresponding to the optical fibers with different core diameters can be stored, and the running direction and the distance of the stepping motor can be calculated, wherein the specific method comprises the following steps:
when optical fibers with different core diameters are put in, the distance between the tips of the electrode needles is accurately adjusted to match the change of the distance between the tips of the electrode needles;
in order to realize the adjustment of the electrode needle spacing when the optical fibers with different core diameters are welded, the characteristic values corresponding to the optical fibers with different core diameters are calculated firstly, the motor is controlled according to the characteristic values to adjust the electrode spacing, and the distance D between the reference surface of the distance sensor and the induction surface of the distance sensor is selectedTAs a characteristic value, DTCalculated according to the formula (1),
DFthe distance of the optical fiber axis relative to the upper surface of the sensor is calculated according to the formula (2):
DEdistance between tips of two electrodes, D0Is the distance between the electrode tip and the reference surface;
then, according to the one-to-one correspondence relationship between the diameters of the optical fibers and the characteristic values, key options are made and stored in a memory of a peripheral circuit of a CPU (central processing unit), and the distances between the optical fibers with different diameters and different electrodes are adjusted in a key selection mode when the optical fiber is used;
when the diameter of the optical fiber to be fusion spliced is selected, the characteristic value D is determinedTAnd then judging the direction of the driving motor and the distance required to be driven according to the distance between the current distance sensor reference surface and the distance sensor sensing surface.
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 (1)
1. A large-core optical fiber high-energy discharge fusion welding device is characterized by comprising two electrodes which are symmetrically arranged on the left and right, an optical fiber channel is formed between the two electrodes, each electrode is connected with an electrode fixing structure, a distance sensor reference surface is arranged on the electrode fixing structure, a distance sensor is arranged right in front of the distance sensor reference surface and is connected with a CPU (central processing unit) through an A/D (analog/digital) conversion circuit, the CPU drives the electrode fixing structure through a stepping motor and a micrometer head, one electrode is connected with a high-voltage discharge control circuit through a high-voltage cable, the output end of the high-voltage discharge control circuit is connected with a high-voltage package, the output end of the high-voltage package is connected with the other electrode through another high-voltage cable, and the high-voltage discharge control;
the control end of the stepping motor is connected with a CPU, the stepping motor drives the dividing head to convert the rotary motion into linear motion through a gear, and then the electrode fixing structure is controlled to drive the two electrodes to move;
when optical fibers with different core diameters are put in, the distance between the tips of the electrode needles is accurately adjusted to match the change of the distance between the tips of the electrode needles;
in order to realize the adjustment of the electrode needle spacing when the optical fibers with different core diameters are welded, the characteristic values corresponding to the optical fibers with different core diameters are calculated firstly, the motor is controlled according to the characteristic values to adjust the electrode spacing, and the distance D between the reference surface of the distance sensor and the induction surface of the distance sensor is selectedTAs a characteristic value, DTCalculated according to equation (1)And then the mixture is discharged out of the furnace,
DFcalculating the distance between the axis of the optical fiber and the sensing surface of the distance sensor according to the formula (2):
DEdistance between tips of two electrodes, D0Is the distance between the electrode tip and the reference surface of the distance sensor;
then, according to the one-to-one correspondence relationship between the diameters of the optical fibers and the characteristic values, key options are made and stored in a memory of a peripheral circuit of a CPU (central processing unit), and the distances between the optical fibers with different diameters and different electrodes are adjusted in a key selection mode when the optical fiber is used;
when the diameter of the optical fiber to be fusion spliced is selected, the characteristic value D is determinedTAnd then judging the direction of the driving motor and the distance required to be driven according to the distance between the current distance sensor reference surface and the distance sensor sensing surface.
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