Optical fiber macrobend testing device and method based on optical fiber production

Abstract

The present invention discloses an optical fiber macrobend test device and method based on optical fiber production, which relates to the field of optical fiber testing technology. A light source for optical signal input is configured at one end of the optical fiber to be tested. The light source, as an optical signal input device, provides an optical signal with constant intensity and wavelength. A detector for receiving and measuring the optical signal transmitted by the optical fiber is configured at the other end of the optical fiber. A traction head is internally configured with a plurality of fixed heads that can clamp the optical fiber. The fixed head is located inside the traction head and rotates around the axis of the rotating table with the traction head. The workbench is annularly configured with a plurality of magnetic strips along the rotating table as the center. The magnetic strips are radially arranged along the rotating table, and the fixed head is separated from the traction head at the magnetic strips. A telescopic part is arranged between the traction head and the rotating table, and the telescopic part is a telescopic arrangement. When the present invention performs a bending test on the optical fiber, the fixed head cooperates with the magnetic strip to clamp the optical fiber, and the optical fiber is fixed at multiple points of the optical fiber to ensure the stability of the optical fiber during the test.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber testing technology, and in particular to an optical fiber macrobend testing device and method based on optical fiber production. Background Art

[0002] Macro bending refers to the bending phenomenon of optical fiber when it is bent with a large radius. The bending of optical fiber will cause loss of optical signal during transmission. The main reason is that when the optical fiber is bent, part of the optical signal will be transferred from the optical fiber core to the cladding, and then scattered or leaked out.

[0003] Macrobending loss usually occurs when the optical fiber is bent with a large radius, such as when it is wrapped around some large objects or bent at a large angle during installation. The impact of macrobending loss on optical fiber transmission performance can be reduced by properly designing the optical fiber structure and selecting appropriate cladding materials.

[0004] Announcement No. CN118500697A discloses an optical fiber macrobend test device, which relates to the technical field of optical fiber test auxiliary equipment, wherein the optical fiber macrobend test device comprises: a mounting seat, a positioning plate, a core shaft and a rotating mechanism; the positioning plate is fixedly mounted on the mounting seat and has a positioning hole penetrating along a first direction, for one end of the optical fiber to pass through; the core shaft is mounted on the mounting seat and is located on one side of the positioning plate in the first direction, for the optical fiber to be wound; the rotating mechanism is mounted on the mounting seat and is arranged corresponding to the positioning plate in the first direction, so that the core shaft is located between the rotating mechanism and the positioning plate in the first direction; wherein the rotating mechanism is used to be fixedly connected to the other end of the optical fiber and rotate the optical fiber around the axis of the first direction. The technical solution provided by the application is to wind the optical fiber on the core shaft, one end passes through the positioning hole for positioning, and the other end is fixedly connected to the rotating assembly, and the rotating assembly rotates, so that the optical fiber rotates accordingly, thereby performing macrobend tests on the optical fiber at different rotation angles.

[0005] Fiber macrobend test: The bending radius of the fiber is a very critical parameter in the test process. Different bending radii often affect the bending loss of the fiber. In the existing test methods, most of them bend the fiber to a specific curvature first, such as the above patent document. Since the stability of the fiber needs to be ensured during the fiber test, the stability of the fiber is ensured by fixing the fiber. However, the operation process is lengthy, the test efficiency is low, and it is not convenient to perform multiple measurements. Summary of the invention

[0006] One of the purposes of the present invention is to provide an optical fiber macrobend testing device and method based on optical fiber production, which can locate multiple points of the optical fiber during the optical fiber bending process, and can detect the optical fiber after the optical fiber is bent, thereby shortening the operation process and improving the efficiency of the optical fiber macrobend test.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: an optical fiber macrobending test device based on optical fiber production, wherein a light source for optical signal input is configured at one end of the optical fiber to be tested, and the light source, as an optical signal input device, provides an optical signal with constant intensity and wavelength, and a detector for receiving and measuring the optical signal transmitted by the optical fiber is configured at the other end of the optical fiber, and the light source and the detector cooperate to evaluate the performance and loss of the optical fiber under macrobending conditions;

[0008] The macrobend test device also includes:

[0009] The support frame is placed on the ground, and a workbench that can be flipped and changed in angle is arranged on the upper part of the support frame. The light source is fixed on the surface of the workbench. The support frame and the workbench are connected by a connecting piece, and the connecting piece is used to fix the flip angle of the workbench.

[0010] A rotating table is arranged at the center of the workbench;

[0011] The traction head is internally provided with a plurality of fixed heads capable of clamping optical fibers. The fixed heads are located inside the traction head and rotate with the traction head around the axis of the rotating table. The worktable is provided with a plurality of magnetic strips in a ring shape along the rotating table as the center. The magnetic strips are radially arranged along the rotating table. The fixed heads are separated from the traction head at the magnetic strips.

[0012] The telescopic member is arranged between the traction head and the rotating table, and the telescopic member is telescopically arranged;

[0013] The detector is installed at one end of the traction head and moves with the traction head.

[0014] In one or more embodiments of the present invention, the traction head includes a traction frame for connecting to the telescopic member, the traction frame is internally provided with a guide groove capable of accommodating a plurality of fixed heads, the fixed heads are arranged in the guide groove, one end of the guide groove at which the fixed heads are separated from the traction frame is a separation end, and the other end is a support end, and an elastic member is arranged inside the support end to support the fixed heads to move toward the separation end;

[0015] The bottom of the guide groove is a magnetic plate, which is installed inside the traction frame and repels the magnetic strip.

[0016] In one or more embodiments of the present invention, a bent spring sheet is arranged on one side of the disengagement end of the guide groove, and the inward side of the spring sheet is bent to form at least one bend for clamping the fixed head. A magnetic attraction component is arranged at the bottom of the spring sheet, and the bottom wall surface of the magnetic attraction component and the bottom wall surface of the traction frame are highly offset, and the bottom wall surface of the magnetic attraction component at the magnetic strip coincides with the bottom wall surface of the traction frame.

[0017] In one or more embodiments of the present invention, a rubber sheet is disposed at the bottom of the fixing head, the rubber sheet is flexibly arranged, and a cavity is arranged inside the fixing head, the cavity is filled with a medium, the cavity supports the rubber sheet, and the bottom surface of the rubber sheet coincides with the bottom surface of the fixing head;

[0018] A sheet-shaped magnetic block is arranged at the bottom of the fixed head, and the sheet-shaped magnetic block is embedded in the inner side of the fixed head and can magnetically attract the magnetic strip.

[0019] In one or more embodiments of the present invention, a plurality of suction cups are arranged at the bottom of the fixed head, and the suction cups extend into the interior of the fixed head. An air extraction part is arranged at one end of the suction cups extending into the interior of the fixed head, and the air extraction part is an elastic cavity and is connected to the suction cups.

[0020] The position of the fixed head corresponding to the bend inside the guide groove is provided with an arc-shaped spacer, the arc-shaped spacer contacts the suction cup, and the arc-shaped spacer is squeezed when the fixed head is located inside the guide groove and is in a bent and clamped state.

[0021] In one or more embodiments of the present invention, a positioning groove is configured on the side of the traction frame away from the disengagement end, and the positioning groove is used to install and position the detector. A top plate with a trapezoidal cross-section is installed on the inner wall of the positioning groove. The top plate is elastically arranged and squeezes the detector to ensure the stability of the detector after the detector is inserted into the bottom of the positioning groove.

[0022] In one or more embodiments of the present invention, one end of the optical fiber is fixed at the light source, and the other end is inserted into the traction head. An elastic roller for clamping the optical fiber is arranged inside the traction head. A plurality of annular grooves of inconsistent sizes are arranged on the outer wall of the elastic roller. The optical fiber passes through the annular grooves corresponding to the sizes thereof. A driving wheel that contacts the workbench is arranged on the outer side of the elastic roller and meshes with the driving wheel. The driving wheel rubs against the workbench to cause the elastic roller to rotate.

[0023] In one or more embodiments of the present invention, the telescopic member is composed of two mutually sleeved connecting tubes, the scale lines are set on the outer surface of the inner tube, and the outer tube is provided with an observation hole at a position corresponding to the scale lines. The observation hole is in the shape of a long strip and is covered by a cover plate. The cover plate is transparent, and the surface of the cover plate is provided with identification lines corresponding to different annular grooves. The identification lines corresponding to the scale lines indicate the distance between the annular groove corresponding to the identification lines and the axis of the rotating table.

[0024] The inner tube is connected to the traction head, the outer tube is connected to the rotating table, and a driving motor is arranged inside the rotating table to connect the inner tube through a threaded rod and drive the inner tube to change the telescopic length.

[0025] In one or more embodiments of the present invention, the telescopic member is an electric telescopic rod, the fixed end of the electric telescopic rod is fixed to the outside of the rotating table, and the telescopic end is connected to the traction head. The electric telescopic rod is telescoped to change the position of the traction head.

[0026] The embodiment of the present invention further provides a method for testing optical fiber macrobends, which is used in the above optical fiber macrobend testing device, and comprises the following steps:

[0027] Fix one end of the optical fiber to the light source, and pass the other end of the optical fiber through the annular groove on the outer side of the elastic roller corresponding to the size of the optical fiber;

[0028] The telescopic member is extended and retracted to change the radius length between the traction head and the center of the rotating table, and determine the rotation radius of the traction head;

[0029] The rotating table drives the traction head to rotate through the telescopic parts. The traction head rotates to the magnetic strip. The magnetic strip magnetically attracts the fixed head, so that the fixed head is separated from the traction head and cooperates with the magnetic strip to clamp and fix the optical fiber.

[0030] The rotation angle range of the traction head is determined according to the length of the optical fiber, and a detector is installed at the end position. The light source and the detector cooperate to determine the loss of the optical fiber under bending conditions.

[0031] Through the above technical solution, the present invention has the following beneficial effects:

[0032] 1. When the present invention performs a bending test on an optical fiber, the fixed head cooperates with the magnetic strip to clamp the optical fiber, and fixes the optical fiber at multiple points on the optical fiber to ensure the stability of the optical fiber during the test. After the swing radius of the traction head is determined, during the rotation of the traction head, the position of the fixed head corresponding to the magnetic strip is separated from the traction head.

[0033] 2. During the movement of the traction head, the driving wheel rotates, driving the elastic roller to rotate through meshing, and utilizing the rotation to stably transport the optical fiber, thereby preventing the optical fiber from pulling the fixed head due to the friction between the optical fiber and the annular groove, causing the fixed head to deviate, affecting the bending radius of the optical fiber, thereby achieving precise control of the bending radius of the optical fiber.

[0034] 3. The fixed head is separated from the traction head by the magnetic attraction of the magnetic strip. The fixed head and the magnetic strip cooperate to clamp the optical fiber to maintain the stability of the optical fiber. The length of the magnetic strip covers the adjustable radius range of the traction head, and the fixed head is magnetically connected to the magnetic strip. Therefore, the fixed head can fix the optical fiber at the position corresponding to any magnetic strip, realizing stepless adjustment and fixation of the radius.

[0035] 4. The position of the traction head is changed by a retractable telescopic part, and the bending radius of the optical fiber is adjusted by the telescopic part to adjust it to different bending states. When the optical fiber completes the detection of the bending radius, the traction head is reset to quickly adjust the bending radius of the optical fiber.

[0036] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A perspective view of the present invention;

[0038] Figure 2 It is a schematic diagram of a workbench of the present invention;

[0039] Figure 3 It is a disassembled diagram of the workbench of the present invention;

[0040] Figure 4 It is a plan view of the workbench of the present invention;

[0041] Figure 5 This is a schematic diagram of the rotary table of the present invention being connected to the pulling head via a telescopic member;

[0042] Figure 6 It is a schematic diagram of the connection structure between the telescopic member and the pulling head of the present invention;

[0043] Figure 7 It is a schematic diagram of the traction head structure of the present invention;

[0044] Figure 8 It is a schematic diagram of the internal structure of the traction frame of the present invention;

[0045] Fig. 9 An exploded view of the traction frame of the present invention;

[0046] Fig.10 A side plan view of a traction frame of the present invention;

[0047] Fig.11 It is a schematic diagram of the spring structure of the present invention;

[0048] Fig.12 It is a schematic diagram of the structure of the fixed head of the present invention;

[0049] Fig.13 It is a schematic diagram of the internal structure of the fixing head of the present invention;

[0050] Fig.14 is a schematic diagram of the anti-slip portion of the present invention;

[0051] Fig.15 It is a schematic diagram of the structure of the suction cup and the air extraction part of the present invention;

[0052] Fig.16 It is an exploded view of the telescopic member of the present invention.

[0053] In the figure: 100 support frame, 200 workbench, 300 light source, 400 detector, 500 rotating table, 600 telescopic part, 700 traction head, 800 fixed head, 900 magnetic strip;

[0054] 61 inner tube, 62 outer tube, 63 scale line, 64 observation hole, 65 cover plate, 66 identification line;

[0055] 71 traction frame, 72 guide groove, 73 disengagement end, 74 support end, 75 magnetic plate, 76 spring piece, 77 bend, 78 magnetic attraction member, 79 positioning groove, 710 top plate, 711 elastic roller, 712 driving wheel, 713 annular groove;

[0056] 81 rubber sheet, 82 cavity, 83 anti-slip portion, 84 suction cup, 85 air extraction portion, 86 arc-shaped spacer. DETAILED DESCRIPTION

[0057] The following will disclose multiple embodiments of the present invention with the accompanying drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. And if it is possible to implement, the features of different embodiments can be applied interchangeably.

[0058] Unless otherwise defined, all words (including technical and scientific terms) used herein have their usual meanings, which can be understood by those familiar with this field. Furthermore, the definitions of the above words in commonly used dictionaries should be interpreted in the content of this specification as consistent with the meanings of the relevant fields of the present invention. Unless otherwise clearly defined, these words will not be interpreted as idealized or overly formal meanings.

[0059] The relationships and terms used in the present invention are explained below:

[0060] Parallelism: The parallelism defined in the present invention is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, which allows for non-absolute parallelism due to factors such as assembly tolerance, design tolerance, and influence of structural flatness. Small angular errors are allowed. For example, an assembly error range of less than 10 degrees can be understood as a parallel relationship.

[0061] Vertical: The verticality defined in the present invention is not limited to an absolute vertical intersection relationship (angle of 90 degrees), and allows for non-absolute vertical intersection relationships caused by factors such as assembly tolerance, design tolerance, and influence of structural flatness. Small angle errors are allowed. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0062] Ground: The ground defined in the present invention is not limited to a certain material or region, but only a platform for carrying the present invention, and stacking, tilting, and flatness changes are allowed. For example, cement ground, tile ground, work platform, etc. can all be interpreted as ground.

[0063] The above explanation does not completely include the relationship definitions given in the present invention, but only represents a part of the present invention.

[0064] The present invention provides an optical fiber macrobend testing device based on optical fiber production. When performing optical fiber testing, the optical fiber can be positioned at a fixed angle to ensure the stability of the optical fiber and improve the efficiency of the optical fiber macrobend testing.

[0065] See also Figure 1-3 In one embodiment, a light source 300 for optical signal input is configured at one end of the optical fiber to be tested. The light source 300, as an optical signal input device, provides an optical signal with constant intensity and wavelength. A detector 400 for receiving and measuring the optical signal transmitted by the optical fiber is configured at the other end of the optical fiber. The light source 300 cooperates with the detector 400 to evaluate the performance and loss of the optical fiber under macrobending conditions.

[0066] The macrobend test device also includes:

[0067] The support frame 100 is placed on the ground, and a workbench 200 that can be turned over and changed in angle is arranged on the upper part thereof. The light source 300 is fixed on the surface of the workbench 200. The support frame 100 and the workbench 200 are connected by a connecting piece, and the connecting piece is used to fix the turning angle of the workbench 200.

[0068] Optionally, the connecting member is a fastening bolt, and after the fastening bolt is loosened, the workbench 200 can be flipped to a different angle, and after the fastening bolt is tightened, the angle of the workbench 200 is fixed;

[0069] Alternatively, the connecting member is a key that can slide up and down. The connecting member is slidably arranged on the outside of the support frame 100, and a key slot is arranged at one end of the workbench 200 that passes through the support frame 100. The key is inserted into the key slot to position the workbench 200. Compared with the fastening bolts, the key slot causes less damage to the workbench 200 and the support frame 100, but can only be adjusted to a fixed angle.

[0070] The rotating table 500 is arranged at the center of the working table 200;

[0071] The traction head 700 is internally provided with a plurality of fixed heads 800 capable of clamping optical fibers. The fixed heads 800 are located inside the traction head 700 and rotate with the traction head 700 around the axis of the rotating platform 500. The worktable 200 is provided with a plurality of magnetic strips 900 in a circular shape with the rotating platform 500 as the center. The magnetic strips 900 are radially arranged along the rotating platform 500. The fixed heads 800 are separated from the traction head 700 at the magnetic strips 900.

[0072] The telescopic member 600 is disposed between the traction head 700 and the rotating platform 500, and the telescopic member 600 is telescopically disposed;

[0073] The detector 400 is mounted on one end of the traction head 700 and moves with the traction head 700 .

[0074] In one feasible method, the rotating table 500 is used to change the circumferential swing angle of the traction head 700, and the telescopic part 600 is used to change the radial extension length of the traction head 700. The rotating table 500 cooperates with the telescopic part 600 to adjust the bending radius of the optical fiber. When the traction head 700 drives the fixed head 800 to rotate, the magnetic strip 900 arranged in the workbench 200 uses magnetic force to pull the fixed head 800 so that the fixed head 800 is separated from the traction head 700.

[0075] After the fixed head 800 is separated from the pulling head 700, it clamps the optical fiber to limit the position of the optical fiber, and the fixed head 800 is in an open state inside the pulling head 700. When the fixed head 800 is not separated from the pulling head 700, the fixed head 800 does not interfere with the optical fiber. When the optical fiber moves to the position of the magnetic strip 900, the position of the optical fiber is limited as the fixed head 800 is separated.

[0076] See also Figure 4-5 as well as Figure 7 As shown, in one embodiment, the traction head 700 includes a traction frame 71 for connecting with the telescopic member 600, and the traction frame 71 is internally provided with a guide groove 72 for accommodating a plurality of fixed heads 800, and the fixed heads 800 are arranged in the guide groove 72. One end of the guide groove 72 where the fixed heads 800 are separated from the traction frame 71 is a separation end 73, and the other end is a support end 74. An elastic member is arranged inside the support end 74 to support the fixed heads 800 to move toward the separation end 73.

[0077] The bottom of the guide groove 72 is a magnetic plate 75 , which is installed inside the traction frame 71 and repels the magnetic strip 900 .

[0078] In one practicable manner, the guide groove 72 provided inside the traction frame 71 can form traction for the fixed head 800 , and when the traction frame 71 moves clockwise or counterclockwise, the fixed head 800 can be recovered or released, and the position of the fixed head 800 is determined by the position of the magnetic strip 900 .

[0079] Optionally, the elastic member is a support spring, one end of which is mounted on the inner wall of the guide groove 72 , and the other end of which contacts the fixed head 800 to support the fixed head 800 . After the fixed head 800 is detached, it is supplemented by the arranged fixed head 800 .

[0080] Alternatively, the elastic member is a magnetic card plate, and an electromagnet is disposed inside the guide groove 72 to drive the card plate to move outward, so that the card plate pushes the fixing head 800 outward.

[0081] See also Figure 8-11In one embodiment, a curved spring sheet 76 is provided on one side of the disengagement end 73 of the guide groove 72, and the inward side of the spring sheet 76 is bent 77 to form at least one bend for clamping the fixed head 800, and a magnetic attraction member 78 is provided at the bottom of the spring sheet 76. The bottom wall surface of the magnetic attraction member 78 and the bottom wall surface of the traction frame 71 are highly offset, and the bottom wall surface of the magnetic attraction member 78 at the magnetic strip 900 coincides with the bottom wall surface of the traction frame 71.

[0082] In one practicable manner, a spring piece 76 is provided for clamping to ensure the stability of the fixing head 800 at the detachment end 73 to avoid detachment from the traction frame 71 at a non-magnetic strip 900 position. The fixing head 800 cooperates with the magnetic strip 900 to clamp the optical fiber.

[0083] Optionally, the magnetic component 78 is made of a material that can be magnetically attracted, and is used to pull and change the state of the spring piece 76. When the magnetic component 78 is not pulled by magnetic force, it is a certain distance away from the workbench 200. Under the traction of the magnetic strip 900, the magnetic component changes the bending state of the spring piece 76, so that the spring piece 76 loosens its clamping of the fixed head 800, allowing the fixed head 800 to detach from the traction frame 71.

[0084] Alternatively, the magnetic attraction member 78 is a magnetic plate 75 , and the magnetic plate 75 cooperates with the magnetic strip 900 to more stably stretch and change the bending state of the spring sheet 76 , so that the fixing head 800 can be separated from the traction frame 71 more quickly.

[0085] Among them, in order to facilitate the recovery of the fixed head 800, the connection position between the traction frame 71 and the disengagement end 73 is set in an inclined bucket shape. When the traction frame 71 recovers the fixed head 800, the traction frame 71 enters the guide groove 72 at the inclined bucket position, thereby reducing the centering accuracy of the fixed head 800 and the traction frame 71 and reducing the overall manufacturing difficulty.

[0086] See also Figure 12-14 As shown, in one embodiment, a rubber sheet 81 is disposed at the bottom of the fixing head 800, the rubber sheet 81 is flexibly arranged, and a cavity 82 is arranged inside the fixing head 800, the cavity 82 is filled with a medium, the cavity 82 supports the rubber sheet 81, and the bottom surface of the rubber sheet 81 coincides with the bottom surface of the fixing head 800;

[0087] A sheet-shaped magnetic block is disposed at the bottom of the fixing head 800 . The sheet-shaped magnetic block is embedded inside the fixing head 800 and can magnetically attract the magnetic strip 900 .

[0088] In one feasible method, an anti-skid portion 83 is provided on the bottom surface of the rubber sheet 81, and the anti-skid portion 83 is used to increase the friction between the rubber sheet 81 and the outer wall of the optical fiber to ensure the stability of the optical fiber. The bottom surface of the rubber sheet 81 is flat when clamping the optical fiber. After the rubber sheet 81 clamps the optical fiber, the rubber sheet 81 is concave to squeeze the cavity 82, and the pressure inside the cavity 82 increases. Combined with the anti-skid portion 83, the stability of the optical fiber is ensured.

[0089] Optionally, the anti-slip portion 83 is a corrugated surface, and after the corrugated surface contacts the optical fiber, the optical fiber is confined in a concave position, and the pressure applied by the cavity 82 to the rubber sheet 81 ensures the stability of the optical fiber.

[0090] Alternatively, the anti-slip portion 83 is staggered anti-slip grooves, which increase the friction between the rubber sheet 81 and the optical fiber to ensure the stability of the position of the optical fiber and avoid displacement of the optical fiber.

[0091] In another embodiment, the workbench 200 is designed to be sunken within the movable range of the traction head 700, and a rubber plate is laid at the sunken position. The cooperation between the rubber plate and the rubber sheet 81 is utilized to further ensure the stability of the optical fiber.

[0092] Exemplarily, the minimum radius of the sinking position is 30 mm, the maximum radius is 60 mm, the sinking depth is 1 mm, and the minimum radius and maximum radius thickness of the rubber sheet are consistent with the sinking size. In order to increase the friction of the optical fiber and ensure the stability of the optical fiber, the thickness of the rubber sheet does not need to be too large and does not affect the magnetic attraction between the magnetic strip 900 and the sheet magnetic block.

[0093] See also Figure 13-14 In one embodiment, a plurality of suction cups 84 are disposed at the bottom of the fixed head 800, and the suction cups 84 extend into the interior of the fixed head 800. An air extraction portion 85 is disposed at one end of the suction cups 84 extending into the interior of the fixed head 800, and the air extraction portion 85 is an elastic cavity 82 and is connected to the suction cups 84;

[0094] The position of the fixing head 800 corresponding to the bend 77 inside the guide groove 72 is provided with an arc-shaped spacer 86 , which contacts the suction cup 84 , and is squeezed when the fixing head 800 is inside the guide groove 72 and is clamped by the bend 77 .

[0095] In one feasible manner, the air extraction portion 85 is connected to the arc-shaped spacer 86. After the arc-shaped spacer 86 is squeezed, the air extraction portion 85 is also squeezed, so that the air inside the air extraction portion 85 is reduced. After the sheet magnetic block is magnetically attracted to the magnetic strip 900, due to the elasticity of the air extraction portion 85 itself and the arc-shaped spacer 86 losing the extrusion caused by external force, the bottom of the suction cup 84 contacts the magnetic strip 900 or the rubber plate, thereby increasing the stability of the fixed head 800 through suction.

[0096] Among them, since the suction cup 84 and the air extraction part 85 are both elastic structures, the squeezing of the air extraction part 85 by the arc-shaped spacer 86 may be caused by bending at the connection position between the air extraction part 85 and the suction cup 84, and the purpose of squeezing the air extraction part 85 to discharge the air inside the air extraction part 85 cannot be achieved. The end of the air extraction part 85 away from the arc-shaped spacer 86 is set to a plane, and the connection position between the air extraction part 85 and the suction cup 84 is both in contact with the fixed head 800 to avoid bending at the connection position.

[0097] See also Figure 6-9 As shown, in one embodiment, a positioning groove 79 is configured on the side of the traction frame 71 away from the disengagement end 73. The positioning groove 79 is used to install the detector 400 and position the detector 400. A top plate 710 with a trapezoidal cross-section is installed on the inner wall of the positioning groove 79. The top plate 710 is elastically arranged and squeezes the detector 400, ensuring the stability of the detector 400 after the detector 400 is inserted into the bottom of the positioning groove 79.

[0098] In one feasible method, the top plate 710 is set to be elastic. When the detector 400 is not pressed by external force, the detector 400 will not move downward. The optical fiber is located between the elastic rollers 711 during the rotation of the traction head 700. Inserting the detector 400 to the bottom will interfere with the rotation of the optical fiber under the action of the elastic rollers 711. After the optical fiber is fixed by the fixing head 800, when the end of the optical fiber is at the position of the detector 400, the detector 400 is inserted into the bottom of the positioning groove 79, and the detector 400 is fixed under the action of the top plate 710.

[0099] See also Figure 8-9 As shown, in one embodiment, one end of the optical fiber is fixed at the light source 300, and the other end is inserted into the traction head 700. An elastic roller 711 for clamping the optical fiber is arranged inside the traction head 700. The outer wall of the elastic roller 711 is provided with a plurality of annular grooves 713 of inconsistent sizes. The optical fiber passes through the annular grooves 713 corresponding to the sizes thereof. A driving wheel 712 is arranged on the outer side of the elastic roller 711 to contact the workbench 200 and mesh with the driving wheel 712. The friction between the driving wheel 712 and the workbench 200 causes the elastic roller 711 to rotate.

[0100] In one feasible method, the elastic roller 711 clamps the optical fiber to ensure that the optical fiber will not separate from the traction head 700 due to its own elasticity. The stability of the optical fiber is ensured by fixing the fixed head 800 at the magnetic strip 900. There is a problem that the optical fiber pulling force is too large, causing the fixed head 800 to separate from the magnetic strip 900, affecting the overall stability. During the movement of the traction head 700, the driving wheel 712 is in contact with the workbench 200, so that the elastic roller 711 has a driving force, and the optical fiber is transported under the action of the driving force, thereby avoiding the problem that the optical fiber pulling force is too large and affects the stability of the fixed head 800.

[0101] The elastic roller 711 is provided with annular grooves 713 of different sizes, which can correspond to optical fibers of different sizes and ensure the stability of the optical fibers, thereby preventing the optical fibers from shifting between the elastic rollers 711 and causing the bending radius of the optical fibers to be less accurate.

[0102] See also Figure 5 as well as Fig.16As shown, in one embodiment, the telescopic member 600 is composed of two mutually sleeved connecting tubes, the scale line 63 is set on the outer surface of the inner tube 61, and the outer tube 62 is provided with an observation hole 64 at the position corresponding to the scale line 63. The observation hole 64 is in a long strip shape and is covered by a cover plate 65. The cover plate 65 is transparent, and the surface of the cover plate 65 is provided with identification lines 66 corresponding to different annular grooves 713. The identification line 66 corresponds to the scale line 63 to indicate the distance between the annular groove 713 corresponding to the identification line 66 and the axis of the rotating table 500;

[0103] The inner tube 61 is connected to the traction head 700 , and the outer tube 62 is connected to the rotating platform 500 . The rotating platform 500 is internally provided with a driving motor which is connected to the inner tube 61 through a threaded rod and drives the inner tube 61 to change the telescopic length.

[0104] In one feasible method, the telescopic member 600 can be used to extend and retract the position of the traction head 700 to control the position of the traction head 700. Since the elastic roller 711 is provided with a plurality of annular grooves 713, there is a distance difference between the annular grooves 713. Therefore, a plurality of marking lines 66 corresponding to the annular grooves 713 are provided on the outer side to determine the movement radius of each annular groove 713.

[0105] In one embodiment, the telescopic member 600 is an electric telescopic rod, the fixed end of which is fixed to the outside of the rotating platform 500, and the telescopic end of which is connected to the traction head 700. The electric telescopic rod is telescoped to change the position of the traction head 700.

[0106] In one practicable manner, the electric telescopic rod can accurately control the movement radius of the traction head 700 through a control system.

[0107] In another embodiment, the rotating table 500 and the telescopic part 600 are both manually adjusted, that is, the rotating table 500 will not drive the telescopic part 600 to rotate, and the inspection personnel manually change the position of the rotating table 500. On this basis, the driving motor and the threaded rod of the telescopic part 600 are adjusted to fixed bolts. After the length of the telescopic part 600 is changed by telescopic means, the telescopic part 600 is fixed by the fixed bolts.

[0108] The above is merely an extension of the present invention based on the technical foundation, and those skilled in the art can make adjustments according to the application scenario.

[0109] The embodiment of the present invention further provides a method for testing optical fiber macrobends, which is used in the above optical fiber macrobend testing device, and comprises the following steps:

[0110] Fix one end of the optical fiber to the light source 300, and pass the other end of the optical fiber through the annular groove 713 corresponding to the size of the optical fiber on the outer side of the elastic roller 711;

[0111] The telescopic member 600 is telescopically extended to change the radius length between the traction head 700 and the center of the rotating platform 500, and determine the rotation radius of the traction head 700;

[0112] The rotating platform 500 drives the traction head 700 to rotate through the telescopic member 600, and the traction head 700 rotates to the magnetic strip 900, and the magnetic strip 900 magnetically attracts the fixed head 800, so that the fixed head 800 is separated from the traction head 700, and cooperates with the magnetic strip 900 to clamp and fix the optical fiber;

[0113] The rotation angle range of the traction head 700 is determined according to the length of the optical fiber, and the detector 400 is installed at the end position. The light source 300 cooperates with the detector 400 to determine the loss of the optical fiber under bending conditions.

[0114] Although the present invention is disclosed in conjunction with the above embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the attached claims.

Claims

1. An optical fiber macrobend test device based on optical fiber production, wherein a light source (300) for optical signal input is arranged at one end of the optical fiber to be tested, the light source (300) serves as an optical signal input device to provide an optical signal with constant intensity and wavelength, and a detector (400) for receiving and measuring the optical signal transmitted by the optical fiber is arranged at the other end of the optical fiber, characterized in that: A support frame (100) is placed on the ground, and a workbench (200) capable of being turned over and changing its angle is arranged on its upper portion; A rotating table (500) is arranged at the center of the workbench (200); A traction head (700) is internally provided with a plurality of fixed heads (800) capable of clamping optical fibers. The fixed heads (800) are located inside the traction head (700) and rotate with the traction head (700) around the axis of the rotating table (500). The worktable (200) is provided with a plurality of magnetic strips (900) in a ring shape with the rotating table (500) as the center. The magnetic strips (900) are radially arranged along the rotating table (500). The fixed heads (800) are separated from the traction head (700) at the magnetic strips (900). The traction head (700) comprises a traction frame (71) for connecting to the telescopic member (600); the traction frame (71) is internally provided with a guide groove (72) capable of accommodating a plurality of fixed heads (800) arranged therein; the fixed heads (800) are arranged in an arranged manner inside the guide groove (72); One end of the optical fiber is fixed to the light source (300), and the other end is inserted into the interior of the traction head (700). An elastic roller (711) for clamping the optical fiber is arranged inside the traction head (700). The outer wall of the elastic roller (711) is provided with a plurality of annular grooves (713) of inconsistent sizes, and the optical fiber passes through the annular grooves (713) of corresponding sizes. A driving wheel (712) that contacts the workbench (200) is arranged on the outer side of the elastic roller (711) and meshes with the driving wheel (712). The driving wheel (712) and the workbench (200) rub against each other to rotate the elastic roller (711).

2. The optical fiber macrobend test device based on optical fiber production according to claim 1, characterized in that: The macrobending test device further comprises: a telescopic member (600) arranged between the traction head (700) and the rotating platform (500), the telescopic member (600) being telescopically arranged; The telescopic member (600) is composed of two mutually sleeved connecting tubes. The scale lines (63) are arranged on the outer surface of the inner tube (61). The outer tube (62) is provided with an observation hole (64) at a position corresponding to the scale lines (63). The observation hole (64) is in the shape of an elongated strip and is covered by a cover plate (65). The cover plate (65) is transparent. The surface of the cover plate (65) is provided with identification lines (66) corresponding to different annular grooves (713). The identification lines (66) corresponding to the scale lines (63) indicate the distance between the annular groove (713) corresponding to the identification lines (66) and the axis of the rotating table (500).

3. The optical fiber macrobend test device based on optical fiber production according to claim 2, characterized in that: One end of the two ends of the guide groove (72) where the fixed head (800) is separated from the traction frame (71) is a separation end (73), and the other end is a support end (74). An elastic member is provided inside the support end (74) to support the movement of the fixed head (800) toward the separation end (73); The bottom of the guide groove (72) is a magnetic plate (75), which is installed inside the traction frame (71) and repels the magnetic strip (900).

4. The optical fiber macrobend test device based on optical fiber production according to claim 3, characterized in that: A bent spring sheet (76) is disposed on one side of the disengagement end (73) of the guide groove (72); a side of the spring sheet (76) facing inward is bent (77) to form at least one bend for clamping the fixed head (800); a magnetic attraction member (78) is disposed at the bottom of the spring sheet (76); a bottom wall surface of the magnetic attraction member (78) and a bottom wall surface of the traction frame (71) are arranged with a height offset; a bottom wall surface of the magnetic attraction member (78) at the magnetic strip (900) overlaps with a bottom wall surface of the traction frame (71).

5. The optical fiber macrobend test device based on optical fiber production according to claim 4, characterized in that: A rubber sheet (81) is disposed at the bottom of the fixed head (800), the rubber sheet (81) is flexibly arranged, and a cavity (82) is arranged inside the fixed head (800), the cavity (82) is filled with a medium, the cavity (82) supports the rubber sheet (81), and the bottom surface of the rubber sheet (81) overlaps with the bottom surface of the fixed head (800); A sheet-shaped magnetic block is disposed at the bottom of the fixed head (800), and the sheet-shaped magnetic block is embedded inside the fixed head (800) and is capable of magnetically attracting the magnetic strip (900).

6. The optical fiber macrobend test device based on optical fiber production according to claim 5, characterized in that: A plurality of suction cups (84) are arranged at the bottom of the fixed head (800), and the suction cups (84) extend into the interior of the fixed head (800). An air extraction portion (85) is arranged at one end of the suction cups (84) extending into the interior of the fixed head (800), and the air extraction portion (85) is an elastic cavity (82) and is arranged in communication with the suction cups (84); The fixed head (800) is located in the guide groove (72) at a position corresponding to the bend (77) and an arc-shaped spacer (86) is provided. The arc-shaped spacer (86) contacts the suction cup (84). When the fixed head (800) is located in the guide groove (72) and is in a clamped state by the bend (77), the arc-shaped spacer (86) is squeezed.

7. The optical fiber macrobend test device based on optical fiber production according to claim 6, characterized in that: The detector (400) is mounted on one end of the traction head (700) and moves along with the traction head (700); A positioning groove (79) is arranged on one side of the traction frame (71) facing away from the disengagement end (73). The positioning groove (79) is used to install the detector (400) and position the detector (400). A top plate (710) with a trapezoidal cross section is installed on the inner wall of the positioning groove (79). The top plate (710) is elastically arranged to press the detector (400).

8. The optical fiber macrobend testing device based on optical fiber production according to claim 2, characterized in that: The inner tube (61) is connected to the traction head (700), and the outer tube (62) is connected to the rotating platform (500). A driving motor is arranged inside the rotating platform (500) and is connected to the inner tube (61) via a threaded rod to drive the inner tube (61) to change the telescopic length.

9. The optical fiber macrobend test device based on optical fiber production according to claim 1, characterized in that: The telescopic member (600) is an electric telescopic rod, the fixed end of which is fixed to the outside of the rotating platform (500), and the telescopic end of which is connected to the traction head (700). The electric telescopic rod is telescoped to change the position of the traction head (700).

10. A method for testing optical fiber macrobends, used in the macrobend testing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Fixing one end of the optical fiber to the light source (300), and passing the other end of the optical fiber through an annular groove (713) corresponding to the size of the optical fiber on the outside of the elastic roller (711); The telescopic member (600) is telescopically extended to change the radius length between the traction head (700) and the center of the rotating platform (500), thereby determining the rotation radius of the traction head (700); The rotating platform (500) drives the traction head (700) to rotate through the telescopic member (600), and the traction head (700) rotates to the magnetic strip (900), and the magnetic strip (900) magnetically attracts the fixed head (800), so that the fixed head (800) is separated from the traction head (700) and cooperates with the magnetic strip (900) to clamp and fix the optical fiber; The rotation angle range of the traction head (700) is determined according to the length of the optical fiber, a detector (400) is installed at the end position, and the light source (300) cooperates with the detector (400) to determine the loss of the optical fiber under bending conditions.

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