CN115389174A - Optical fiber macrobend test winding device and test method thereof - Google Patents
Optical fiber macrobend test winding device and test method thereof Download PDFInfo
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- CN115389174A CN115389174A CN202211341830.1A CN202211341830A CN115389174A CN 115389174 A CN115389174 A CN 115389174A CN 202211341830 A CN202211341830 A CN 202211341830A CN 115389174 A CN115389174 A CN 115389174A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
- B65H54/28—Traversing devices; Package-shaping arrangements
- B65H54/2803—Traversing devices; Package-shaping arrangements with a traversely moving package
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0207—Details of measuring devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/32—Optical fibres or optical cables
Abstract
The invention discloses an optical fiber macrobend testing winding device and a testing method thereof, wherein the optical fiber macrobend testing winding device comprises a paying-off assembly, a dancing wheel, a tension wheel and a winding assembly; the paying-off assembly comprises a paying-off wheel; the dancing wheel is arranged above the paying-off wheel and connected with the rocker arm, and the rocker arm is connected with the pressure adjusting assembly which drives the dancing wheel to transversely move; the tension pulley and the dancing pulley are positioned on the same horizontal plane, the tension pulley is positioned above the winding assembly, and a tension sensor is arranged on the tension pulley; and the paying-off wheel constantly rotates to wind the optical fiber to be detected on the winding assembly through the dancing wheel and the tension wheel. The device can realize the uniform winding of the optical fiber to be tested, and always keep the same tension at all parts of the optical fiber to be tested during the winding, so as to avoid the different tightness degrees of the wound optical fiber to be tested due to the different techniques and levels of operators, and further avoid the influence of the tightness degrees of the optical fiber to be tested on the macrobending test of the optical fiber.
Description
Technical Field
The invention belongs to the technical field of optical fiber macrobend detection, and particularly relates to an optical fiber macrobend test winding device and a test method thereof.
Background
With the great development of the network age, the internet plays an increasingly important role in the life of people, the application of the internet is directly closely related to the data transmission rate, and with the development of science and technology, people have higher requirements on the data transmission rate, and the optical fiber transmission rate is higher than that of a twisted pair, so that more and more home-entering broadband is mainly optical fiber at present.
Because the influence of the field environment in the application process, the optical fiber can be bent inevitably, when the ordinary single-mode optical fiber is bent, the optical signal in the optical fiber cannot form total reflection, so that part of light is transmitted through the cladding of the optical fiber, the loss of the optical fiber is increased, the transmission performance is reduced, and the normal use of the user internet is seriously influenced. However, before the optical fiber is delivered from a factory, the bending-resistant optical fiber needs to be subjected to a bending additional loss test, namely a macrobending test, so as to ensure the marking and quality requirements of the optical fiber.
At present, according to the requirement of macrobending test of optical fiber, the optical fiber needs to be wound into rings with different diameters for macrobending test, the existing method is that a tester directly winds the optical fiber onto metal rods with different diameters for testing, the existing testing method is that the optical fiber is manually wound, the tester manually directly winds the optical fiber onto the metal rods with different diameters for testing, the tightness of winding of different personnel is different due to different technologies and levels of operators, the tightness of winding of the different personnel has large influence on the macrobending test of the optical fiber, and therefore the testing error is large.
And when the small bending diameter is tested, part of light can be reflected on the cladding, and the coating interface of the optical fiber is totally reflected, so that the macro-bending test of the optical fiber has high randomness, and the test error is large.
Disclosure of Invention
The invention aims to provide an optical fiber macrobend test winding device and a test method thereof aiming at the defects in the prior art, so as to solve the problem of large optical fiber macrobend test error caused by manual optical fiber surrounding and randomness test.
In order to achieve the purpose, the invention adopts the technical scheme that:
the first aspect is that the optical fiber macrobend testing winding device and the testing method thereof comprise a paying-off component, a dancing wheel, a tension wheel and a winding component;
the paying-off assembly comprises a paying-off wheel; the dancing wheel is arranged above the pay-off wheel and connected with the rocker arm, and the rocker arm is connected with the pressure adjusting assembly which drives the dancing wheel to transversely move; the tension pulley and the dancing pulley are positioned on the same horizontal plane, the tension pulley is positioned above the winding assembly, and a tension sensor is arranged on the tension pulley;
and the paying-off wheel constantly rotates to wind the optical fiber to be detected on the winding assembly through the dancing wheel and the tension wheel.
Further, the pressure regulating assembly comprises a cylinder and a pressure regulator; the pressure regulator is connected with the cylinder, and a piston rod of the cylinder is connected with the rocker arm.
Further, the rocker arm is connected to an angle sensor.
Further, the winding assembly comprises a test roller for winding the optical fiber to be tested; the testing roller is horizontally arranged, and a spline groove is formed in the testing roller; a spline shaft matched with the spline groove penetrates through the test roller; the edge end of the test roller is fixedly connected with the rotating piece; the rotating piece is rotationally connected with the positioning piece; the spline shaft sequentially passes through the test roller, the rotating piece and the positioning piece and is connected with the rotating motor; and the rear end of the rotating motor is provided with a rotary encoder which coaxially rotates with the spline shaft.
Furthermore, a rotary ring groove is formed on the rotary piece; the positioning piece is provided with a plurality of connecting pieces, and each connecting piece comprises a connecting rod and a rotating head; one end of the connecting rod is fixedly connected with the positioning piece, and the other end of the connecting rod is fixedly connected with the rotating head; the rotating head is positioned in the rotating ring groove and is rotationally connected with the rotating ring groove; the rotating piece and the positioning piece are both provided with center holes for the spline shaft to pass through.
Further, the bottom of the positioning piece is fixedly connected with the top of the sliding block; the bottom of the sliding block is provided with a threaded hole, and a lead screw guide rail penetrates through the threaded hole; the edge end of the screw rod guide rail is rotationally connected with the wire arranging motor, and the wire arranging encoder which coaxially rotates with the screw rod guide rail is installed at the rear end of the wire arranging motor.
Further, the device also comprises an attenuation detector; the output end and the input end of the attenuation detector are respectively connected with the laser emitting leading fiber and the laser receiving leading fiber; and two ends of the optical fiber to be tested wound on the test roller are respectively connected with the laser emission leading fiber and the laser receiving leading fiber in a fusion mode.
Furthermore, the tension sensor, the pressure regulator, the angle sensor, the rotating motor, the rotating encoder, the winding displacement motor, the winding displacement encoder and the attenuation detector are electrically connected with the computer.
In a second aspect, a testing method for an optical fiber macrobend testing winding device comprises the following steps:
s1, constantly rotating a pay-off wheel, paying off optical fibers to be tested from the pay-off wheel, and winding the optical fibers to be tested on a testing roller through a dancing wheel and a tension wheel in sequence;
s2, simultaneously starting the rotary motor, the rotary encoder, the winding displacement motor and the winding displacement encoder, winding the optical fiber to be tested at a constant speed by the test roller, and simultaneously driving the sliding block, the positioning piece and the test roller to transversely move at a constant speed by the lead screw guide rail to wind the optical fiber to be tested on the test roller at equal intervals;
s3, after winding is finished, closing the rotary motor, the rotary encoder, the winding displacement motor and the winding displacement encoder, cutting off the optical fiber to be tested from the tension wheel, taking out the testing roller, and respectively connecting two ends of the optical fiber to be tested on the testing roller with the laser emission leading fiber and the laser receiving leading fiber in a fusion mode;
s4, attenuation detectionThe laser emitting and leading fiber emits laser with wavelength of 1548nm, and the laser receiving and leading fiber receives laser power corresponding to the laser intensity with wavelength of 1548nm, which is marked as Y 11548 (ii) a Then, the wavelength is gradually increased by 1nm for transmitting and receiving, and the transmission and the receiving are carried out for N times in a circulating manner, wherein N is the circulating time;
s5, taking down the optical fiber to be tested from the test roller, tiling the optical fiber, and coiling an optical fiber ring with the diameter larger than 280mm at the tail end of the optical fiber;
s6, emitting laser with the wavelength of 1548nm from the laser emission leading fiber by the attenuation detector, and receiving laser power corresponding to the laser intensity with the wavelength of 1548nm by the laser receiving leading fiber, wherein the laser power is marked as Y 21548 (ii) a Then, the wavelength is gradually increased by 1nm for transmitting and receiving, and the operation is circularly carried out for N times;
s7, calculating attenuation difference of power transmitted in the optical fiber by the same wavelength in the steps S4 and S6, and drawing by taking the attenuation difference as a vertical coordinate and the wavelength as a horizontal coordinate so as to fit and obtain a curve graph of the power attenuation difference transmitted in the optical fiber by the wavelength;
s8, fitting based on the curve graph to obtain a wavelength power attenuation formula:
φ=Ae Bx +C
C=Y 1
Y 1 =Y 11548 -Y 21548
wherein phi is the power attenuation difference of the transmission of the wavelength in the optical fiber; A. b and C are coefficients to be determined, e is a natural constant, x is a wavelength, and Y is 1 The power attenuation difference transmitted in the optical fiber is 1548 nm;
s9, deforming a wavelength power attenuation formula:
φ-C=Ae Bx
taking pairs of two sides:
Ln(φ-C) = Bx+lnA
let U = ln (Φ -C) Z = lnA, then there are:
U = Bx + Z
calculating the absolute value of the deviation:
wherein the content of the first and second substances,
for the theoretical attenuation power difference of the ith test,
the actual attenuation power difference for the ith test, n is the total number of tests,iis a test serial number;
the absolute value of the deviation is minimum, i.e. the partial derivative is 0:
from this calculation:
the optical fiber macrobend testing winding device and the testing method thereof provided by the invention have the following beneficial effects:
the device can realize the uniform winding of the optical fiber to be tested, and always keep the same tension at all parts of the optical fiber to be tested when winding, so as to avoid the different tightness degrees of the wound optical fiber to be tested due to different techniques and levels of operators, and further avoid the influence of the tightness degrees of the optical fiber to be tested on the macrobending test of the optical fiber;
besides, the invention can realize the fitting of the optical fiber macrobend test curve, and eliminate macrobend test errors by taking logarithms on two sides of the test data curve and then according to the method of minimum weighted average, thereby avoiding the problem that the macrobend test errors are crossed due to the transmission of light in a cladding in the macrobend test of the optical fiber, particularly in the small-bending diameter test, and greatly improving the precision and the repeatability of the macrobend test of the optical fiber.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic view of a winding assembly according to the present invention;
FIG. 3 is a schematic diagram of the test of the optical fiber to be tested wound around the test drum according to the present invention.
FIG. 4 is a schematic diagram of testing when optical fibers to be tested are tiled.
Fig. 5 is a view showing the positioning member and the rotating member in cooperation with each other according to the present invention.
Figure 6 is a cross-sectional view of a rotating element of the present invention in engagement with a rotating head.
Fig. 7 is a graph of the transmitted power attenuation difference of the laser wavelength in the optical fiber to be tested under two conditions, that is, a macrobend test curve of the optical fiber, wherein the ordinate is the attenuation difference of the corresponding power transmitted in the optical fiber at the same wavelength, and the abscissa is the wavelength.
FIG. 8 is a graph of attenuation curve obtained by curve fitting, i.e. fitted fiber macrobend test curve, according to the present invention; the abscissa is the wavelength and the ordinate is the attenuation difference of the corresponding power transmitted in the optical fiber by the same wavelength.
The winding device comprises a winding component 1; 2. a tension pulley; 3. a tension sensor; 4. a computer; 5. a pay-off assembly; 6. a pressure regulator; 7. a cylinder; 8. dancing wheels; 9. an angle sensor; 10. an optical fiber to be tested; 11. a flat cable encoder; 12. a wire arranging motor; 13. a lead screw guide rail; 14. a rotary encoder; 15. a rotating electric machine; 16. testing the roller; 17. a spline shaft; 18. a positioning member; 19. a rotating member; 20. a slider; 21. an attenuation detector; 22. laser emission fiber leading; 23. receiving a leading fiber by laser; 24. rotating the head; 25. a connecting rod; 26. a central bore; 27. the ring groove is rotated.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Example 1
Referring to fig. 1, the optical fiber macrobend testing winding device and the testing method thereof in the scheme comprise a paying-off assembly 5, a dancing wheel 8, a tension wheel 2 and a winding assembly 1;
the paying-off assembly 5 comprises a paying-off wheel, the dancing wheel 8 is arranged above the paying-off wheel, the dancing wheel 8 is connected with a rocker arm, the rocker arm is connected with a pressure adjusting assembly, and the pressure adjusting assembly drives the dancing wheel 8 to transversely move; the tension pulley 2 and the dancing pulley 8 are positioned on the same horizontal plane, the tension pulley 2 is positioned above the winding assembly 1, and the tension pulley 2 is provided with a tension sensor 3; the paying-off wheel constantly rotates to wind the optical fiber 10 to be measured on the winding assembly 1 through the dancing wheel 8 and the tension wheel 2.
Specifically, the paying-off wheel is connected with a motor and used for driving the paying-off wheel to carry out paying-off operation.
The pressure regulating assembly comprises a cylinder 7 and a pressure regulator 6, the pressure regulator 6 is connected with the cylinder 7, a piston rod of the cylinder 7 is connected with a rocker arm, the rocker arm is connected with an angle sensor 9, and a dancing wheel 8 is connected with the rocker arm.
The angle sensor 9 measures the position of the dancing wheel 8 in real time and transmits the measured position to the computer 4, and the computer 4 compares the received angle signal with a preset value to adjust the rotating speed of the rotating motor 15, so that the dancing wheel 8 is kept vertical, and meanwhile, the rotating encoder 14 transmits the rotating angle and the rotating speed to the controller.
The tension sensor 3 collects tension of the optical fiber 10 to be detected on the tension wheel 2 in real time, if the tension of the optical fiber 10 to be detected is larger than or smaller than a preset value, the computer 4 controls the pressure regulator 6 to operate, the air cylinder 7 is inflated and deflated, the piston on the air cylinder 7 drives the rocker arm to move left and right, the dancing wheel 8 is driven to move left and right, the tension of the dancing wheel 8 on the optical fiber 10 to be detected is changed, and the tension sensor 3 on the tension wheel 2 detects that the tension of the optical fiber 10 to be detected at the moment is the same as the preset tension value.
Referring to fig. 2, the present embodiment specifically shows a winding assembly 1, which includes a testing roller 16 for winding an optical fiber 10 to be tested; the testing roller 16 is horizontally arranged, the spline groove is formed in the testing roller 16, the spline shaft 17 matched with the spline groove penetrates through the testing roller 16, the spline groove is distributed along the length direction of the testing roller 16, and the spline shaft 17 drives the testing roller 16 to rotate so as to wind the optical fiber 10 to be tested on the testing roller 16.
The edge end of the test roller 16 is fixedly connected with a rotating part 19, the rotating part 19 is rotatably connected with a positioning part 18, the spline shaft 17 sequentially penetrates through the test roller 16, the rotating part 19 and the positioning part 18 and is connected with the rotating motor 15, and the rear end of the rotating motor 15 is provided with a rotary encoder 14 which coaxially rotates with the spline shaft 17.
Referring to fig. 5 and 6, a rotating ring groove 27 is formed on the rotating element 19, a plurality of connecting elements are arranged on the positioning element 18, each connecting element comprises a connecting rod 25 and a rotating head 24, the rotating head 24 is cylindrical, one end of the connecting rod 25 is fixedly connected with the positioning element 18, and the other end of the connecting rod 25 is fixedly connected with the rotating head 24; rotating head 24 is located in rotating ring groove 27 and is rotatably connected with rotating ring groove 27; the rotating member 19 and the positioning member 18 are both provided with center holes 26 for the spline shaft 17 to pass through, and a gap exists between the spline shaft 17 and the center holes 26.
The positioning part 18 and the rotating part 19 are both annular structures, and the bottom of the positioning part 18 is fixedly connected with the top of the sliding block 20; the bottom of the slide block 20 is provided with a threaded hole, and a lead screw guide rail 13 is arranged in the threaded hole in a penetrating way; the edge end of the screw rod guide rail 13 is rotationally connected with a wire arranging motor 12, and the rear end of the wire arranging motor 12 is provided with a wire arranging encoder 11 which coaxially rotates with the screw rod guide rail 13.
Under the matching action of the spline shaft 17 and the spline groove, the test roller 16 is driven to rotate, and in the rotating process, due to the rotating operation of the rotating head 24 and the rotating ring groove 27, the positioning piece 18 does not rotate in the process; meanwhile, under the rotating action of the slider 20 and the lead screw guide rail 13, the slider 20 will make a linear motion on the lead screw guide rail 13, and then the slider 20 will drive the positioning element 18 to move left and right, that is, the positioning element 18 drives the rotating element 19 and the whole testing roller 16 to move left and right, so as to wind the optical fiber 10 to be tested on the testing roller 16 at equal intervals, that is, the testing roller 16 of this embodiment can realize both rotating operation and horizontal moving operation.
Referring to fig. 3, the output end and the input end of the attenuation detector 21 are connected to the laser emitting lead fiber 22 and the laser receiving lead fiber 23, respectively; two ends of the optical fiber 10 to be tested wound on the testing roller 16 are respectively connected with the laser emitting leading fiber 22 and the laser receiving leading fiber 23 in a welding way.
Referring to fig. 4, the fiber 10 to be tested is removed from the test drum 16 and laid flat with a fiber loop of greater than 280mm at the trailing end of the fiber.
The tension sensor 3, the pressure regulator 6, the angle sensor 9, the rotating motor 15, the rotary encoder 14, the winding displacement motor 12, the winding displacement encoder 11 and the attenuation detector 21 are all electrically connected with the computer 4.
Example 2
Referring to fig. 1 to 6, a testing method of an optical fiber macrobend testing winding device includes the following steps:
s1, constantly rotating a pay-off wheel, paying off an optical fiber 10 to be tested from the pay-off wheel, and winding the optical fiber 10 to be tested on a test roller 16 through a dancing wheel 8 and a tension wheel 2 in sequence;
s2, simultaneously starting the rotary motor 15, the rotary encoder 14, the winding displacement motor 12 and the winding displacement encoder 11, winding the optical fiber 10 to be tested at a constant speed by the test roller 16, and simultaneously driving the sliding block 20, the positioning piece 18 and the test roller 16 to transversely move at a constant speed by the lead screw guide rail 13 to wind the optical fiber 10 to be tested on the test roller 16 at equal intervals;
step S3, after winding is finished, closing the rotary motor 15, the rotary encoder 14, the winding displacement motor 12 and the winding displacement encoder 11, cutting off the optical fiber 10 to be tested from the tension wheel 2, taking out the test roller 16, and respectively connecting two ends of the optical fiber 10 to be tested on the test roller 16 with the laser emission leading fiber 22 and the laser receiving leading fiber 23 in a welding manner;
s4, the attenuation detector 21 emits laser with the wavelength of 1548nm from the laser emission leading fiber 22, and the laser receiving leading fiber 23 receives laser power corresponding to the intensity of the laser with the wavelength of 1548nm, which is marked as Y 11548 (ii) a Then gradually increasing the wavelength by 1nm for transmitting and receiving, and circularly performing N times, wherein N is the number of circulating times;
s5, taking down the optical fiber 10 to be tested from the test roller 16, tiling the optical fiber, and coiling an optical fiber ring with a diameter larger than 280mm at the tail end of the optical fiber;
s6, the attenuation detector 21 emits laser with the wavelength of 1548nm from the laser emission leading fiber 22, and the laser receiving leading fiber 23 receives laser power corresponding to the laser intensity with the wavelength of 1548nm, which is marked as Y 21548 (ii) a Then the wavelength is gradually increased by 1nm for transmitting and receiving, and the circulation is carried out for N times;
step S7, calculating an attenuation difference of power transmitted in the optical fiber by the same wavelength in the steps S4 and S6, and drawing by using the attenuation difference as a ordinate and the wavelength as an abscissa to obtain a curve graph of the power attenuation difference transmitted in the optical fiber by the wavelength in a fitting manner, as shown in fig. 7;
s8, fitting based on the curve graph to obtain a wavelength power attenuation formula:
φ=Ae Bx +C
C=Y 1
Y 1 =Y 11548 -Y 21548
wherein phi is the power attenuation difference of the transmission of the wavelength in the optical fiber; A. b and C are coefficients to be determined, e is a natural constant, x is a wavelength, and Y is 1 The power attenuation difference transmitted in the optical fiber is 1548 nm;
s9, deforming a wavelength power attenuation formula:
φ-C=Ae Bx
taking pairs of two sides:
Ln(φ-C) = Bx+lnA
let U = ln (Φ -C) Z = lnA, then there are:
U = Bx + Z
calculating the absolute value of the deviation:
wherein the content of the first and second substances,
for the theoretical attenuation power difference of the ith test,
the actual attenuation power difference for the ith test, n is the total number of tests,iis a test serial number;
the absolute value of the deviation is minimal, i.e. the partial derivative is 0:
from this calculation:
as shown in fig. 8, error analysis and test accuracy comparison were performed:
TABLE 1
As shown in Table 1, compared with the common single-point test method, the test method of the invention has the advantages that the test precision of the transmission wavelength at 1500nm is improved by 1.2%, and the test precision of the transmission wavelength at 1625nm is improved by 2%.
And (5) testing repeatability, and continuously testing the same optical fiber for 100 times.
TABLE 2
As can be seen from Table 2, compared with the common single-point test method, the test standard deviation of the transmission wavelength at 1500nm is improved by 0.011, and the test standard deviation of the transmission wavelength at 1625nm is improved by 0.03. The invention can greatly improve the macro-bending test repetition and test precision of the optical fiber.
While the embodiments of this invention have been described in detail, it should not be considered limited to such details. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (9)
1. The utility model provides an optic fibre macrobend test winding device which characterized in that: the dancing wheel tension device comprises a paying-off assembly, a dancing wheel, a tension wheel and a winding assembly;
the paying-off assembly comprises a paying-off wheel; the dancing wheel is arranged above the pay-off wheel and connected with the rocker arm, the rocker arm is connected with a pressure adjusting assembly, and the pressure adjusting assembly drives the dancing wheel to transversely move; the tension pulley and the dancing pulley are positioned on the same horizontal plane, the tension pulley is positioned above the winding assembly, and a tension sensor is arranged on the tension pulley;
and the paying-off wheel constantly rotates to enable the optical fiber to be detected to pass through the dancing wheel and the tension wheel to be wound on the winding assembly.
2. The optical fiber macrobend test winding device according to claim 1, wherein: the pressure regulating assembly comprises a cylinder and a pressure regulator; the pressure regulator is connected with the cylinder, and a piston rod of the cylinder is connected with the rocker arm.
3. The optical fiber macrobend test winding device according to claim 2, wherein: the rocker arm is connected with an angle sensor.
4. The optical fiber macrobend test winding device according to claim 3, wherein: the winding assembly comprises a test roller for winding the optical fiber to be tested; the testing roller is horizontally arranged, and a spline groove is formed in the testing roller; a spline shaft matched with the spline groove penetrates through the test roller; the edge end of the test roller is fixedly connected with the rotating piece; the rotating piece is rotationally connected with the positioning piece; the spline shaft sequentially penetrates through the test roller, the rotating piece and the positioning piece and is connected with the rotating motor; and a rotary encoder which coaxially rotates with the spline shaft is installed at the rear end of the rotary motor.
5. The optical fiber macrobend test winding device according to claim 4, wherein: the rotating piece is provided with a rotating ring groove; the positioning piece is provided with a plurality of connecting pieces, and each connecting piece comprises a connecting rod and a rotating head; one end of the connecting rod is fixedly connected with the positioning piece, and the other end of the connecting rod is fixedly connected with the rotating head; the rotating head is positioned in the rotating ring groove and is rotationally connected with the rotating ring groove; and the rotating part and the positioning part are both provided with center holes for the spline shaft to pass through.
6. The optical fiber macrobend test winding device according to claim 5, wherein: the bottom of the positioning piece is fixedly connected with the top of the sliding block; the bottom of the sliding block is provided with a threaded hole, and a lead screw guide rail penetrates through the threaded hole; the edge end of the screw rod guide rail is rotationally connected with the wire arranging motor, and the rear end of the wire arranging motor is provided with a wire arranging encoder which coaxially rotates with the screw rod guide rail.
7. The optical fiber macrobend test winding device according to claim 6, wherein: the device also comprises an attenuation detector; the output end and the input end of the attenuation detector are respectively connected with a laser emission leading fiber and a laser receiving leading fiber; and two ends of the optical fiber to be tested wound on the test roller are respectively connected with the laser emission leading fiber and the laser receiving leading fiber in a welding way.
8. The optical fiber macrobend test winding device according to claim 7, wherein: the tension sensor, the pressure regulator, the angle sensor, the rotating motor, the rotating encoder, the winding displacement motor, the winding displacement encoder and the attenuation detector are all electrically connected with the computer.
9. A testing method adopting the optical fiber macrobend testing winding device of claim 8 is characterized by comprising the following steps:
s1, constantly rotating a pay-off wheel, paying off optical fibers to be tested from the pay-off wheel, and winding the optical fibers to be tested on a testing roller through a dancing wheel and a tension wheel in sequence;
s2, simultaneously starting the rotary motor, the rotary encoder, the winding displacement motor and the winding displacement encoder, winding the optical fiber to be tested at a constant speed by the test roller, and simultaneously driving the sliding block, the positioning piece and the test roller to transversely move at a constant speed by the lead screw guide rail to wind the optical fiber to be tested on the test roller at equal intervals;
s3, after winding is finished, closing the rotary motor, the rotary encoder, the winding displacement motor and the winding displacement encoder, cutting off the optical fiber to be tested from the tension wheel, taking out the testing roller, and respectively connecting two ends of the optical fiber to be tested on the testing roller with the laser emission leading fiber and the laser receiving leading fiber in a fusion mode;
s4, the attenuation detector emits laser with the wavelength of 1548nm from the laser emission leading fiber, and the laser receiving leading fiber receives laser power corresponding to the laser intensity with the wavelength of 1548nm and marked as Y 11548 (ii) a Then, the wavelength is gradually increased by 1nm for transmitting and receiving, and the transmission and the receiving are carried out for N times in a circulating manner, wherein N is the circulating time;
s5, taking the optical fiber to be tested down from the test roller and tiling the optical fiber, and coiling an optical fiber ring with a diameter larger than 280mm at the tail end of the optical fiber;
s6, emitting laser with the wavelength of 1548nm from the laser emission leading fiber by the attenuation detector, and receiving laser power corresponding to the laser intensity with the wavelength of 1548nm by the laser receiving leading fiber, wherein the laser power is marked as Y 21548 (ii) a Then the wavelength is gradually increased by 1nm for transmitting and receiving, and the circulation is carried out for N times;
s7, calculating attenuation difference of corresponding power transmitted in the optical fiber by the same wavelength in the step S4 and the step S6, and drawing by taking the attenuation difference as a vertical coordinate and the wavelength as a horizontal coordinate so as to fit and obtain a curve graph of the power attenuation difference transmitted in the optical fiber by the wavelength;
s8, fitting based on the curve graph to obtain a wavelength power attenuation formula:
φ=Ae Bx +C
C=Y 1
Y 1 =Y 11548 -Y 21548
wherein phi is the power attenuation difference of the transmission of the wavelength in the optical fiber; A. b and C are coefficients to be determined, e is a natural constant, x is a wavelength, and Y is 1 Power attenuation difference transmitted in the optical fiber for 1548nm wavelength;
s9, deforming a wavelength power attenuation formula:
φ-C=Ae Bx
taking pairs of two sides:
Ln(φ-C) = Bx+lnA
let U = ln (Φ -C) Z = lnA, then there are:
U = Bx + Z
calculating the absolute value of the deviation:
wherein, the first and the second end of the pipe are connected with each other,
for the theoretical attenuation power difference of the ith test,
the actual attenuation power difference for the ith test, n is the total number of tests,iis a test serial number;
the absolute value of the deviation is minimal, i.e. the partial derivative is 0:
from this calculation:
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