Optical fiber attenuation performance on-line testing device and testing method

Abstract

The invention relates to an optical fiber attenuation performance on-line test device and a test method, which are used for carrying out synchronous test on optical fibers in production. A first through hole and a penetrating through hole are formed in the shell; the penetrating through hole is formed in the axial direction of the shell, and the axis of the penetrating through hole is overlapped with the central axis of the shell; a rotary connection unit that rotates the connector and the cable assembly; the cable assembly is assembled on the rotary connector; the rotary connector is provided with a through mounting hole along the axial direction; and a rotating shaft unit including a central rotating shaft mounted on the support body in a horizontal direction, a housing mounted on the central rotating shaft through a through hole, and the rotating connector mounted on the central rotating shaft through the mounting hole. According to the invention, optical fiber attenuation performance indexes are tested on line in the production process; the detection efficiency and the detection precision are improved; the leakage detection risk of manual testing is reduced, the testing timeliness is improved, and batch accidents are avoided.

Description

Technical Field

[0001] This invention relates to the field of optical communication testing technology, and in particular to an online testing device and method for optical fiber attenuation performance. Background Technology

[0002] In the manufacturing process of optical fibers and cables, to ensure that the transmission performance of the final product meets standards, optical performance tests are typically conducted on semi-finished or finished products after each key process. Among these tests, the attenuation performance of the optical fiber is a core indicator, directly affecting the transmission quality of optical signals and the reliability of the communication system. Currently, the industry commonly uses an optical time-domain reflectometer (OTDR) to test the attenuation coefficient of the optical fiber using the backscattering method. This test is performed by professional testing personnel, and only after the test results are confirmed to be satisfactory can the semi-finished or finished product proceed to the next stage of production.

[0003] However, existing testing methods have several shortcomings. First, testing personnel need to operate the optical time-domain reflectometer (OTDR) while manually recording test data, a cumbersome and time-consuming process that leads to low testing efficiency. Second, data recording errors, omissions, or misjudgments are prone to occur, affecting the accuracy of test results. Furthermore, the testing process cannot provide real-time response, potentially leading to delayed testing, resulting in missed inspections of some products or undetected batches, increasing the risk of batch quality incidents. On the other hand, manual testing is labor-intensive, and prolonged repetitive operations can easily cause fatigue for testing personnel, further affecting the stability and consistency of the tests. Simultaneously, the matching of test data is poor; test results from different personnel, at different times, or using different equipment are difficult to effectively compare and manage uniformly, making it difficult to accurately report test results. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an online testing device and method for optical fiber attenuation performance indicators, which is applicable to the optical fiber and cable industry and various processes of optical cable production. It can test the optical fiber attenuation performance indicators and length online during the production process, determine whether fiber breakage has occurred, and determine the location of the fiber breakage; improve detection efficiency and detection accuracy, reduce the risk of missed detections in manual testing, improve the timeliness of testing, avoid batch accidents, and reduce the cost of manual testing.

[0005] To address the aforementioned technical problems, this invention provides an online optical fiber attenuation performance testing device for synchronously testing optical fibers in production, comprising: Support structure; A housing having a first through hole and a through hole; the through hole is arranged along the axial direction of the housing, and the axis of the through hole overlaps with the central axis of the housing; A rotary connection unit includes a rotary connector and a cable assembly; the cable assembly is assembled to the rotary connector; the rotary connector has a through mounting hole along the axial direction; A rotating shaft unit includes a central rotating shaft mounted horizontally on the support body, a housing mounted on the central rotating shaft through a through hole, and a rotating connector mounted on the central rotating shaft through a mounting hole, with the rotating connector coaxially connected to the housing; the central rotating shaft is driven to rotate, thereby driving the housing and part of the rotating connector to rotate synchronously. The test unit includes a test module and an optical fiber coupler. The test module is housed in the housing, and the optical fiber under test is connected to the test module through the optical fiber coupler. The control unit includes a test host, which is connected to the test module via the cable assembly to obtain test data from the test module.

[0006] In one embodiment of the present invention, the rotary connector includes an outer rotating body and an inner rotating body arranged coaxially, the inner rotating body being connected to the housing and capable of rotating synchronously with the housing; the cable assembly includes a first cable assembly and a second cable assembly, the first cable assembly being mounted on the outer rotating body and the second cable assembly being mounted on the inner rotating body.

[0007] In one embodiment of the present invention, the housing includes a base plate, a cover plate, a connecting ring, and a connecting seat. The base plate and the cover plate are spaced apart, and the connecting ring connects the base plate and the cover plate respectively to form a receiving space. The first through hole is disposed in the connecting ring. The through hole includes a second through hole and a third through hole. The second through hole is disposed in the base plate, and the third through hole is disposed in the cover plate. The rotary connector is connected to the connecting seat.

[0008] In one embodiment of the present invention, the edge of the connecting ring is recessed to form a recessed portion, and the first through hole is disposed in the recessed portion.

[0009] In one embodiment of the present invention, the recess includes a first connecting plate, a second connecting plate, and a dust cover, wherein the first connecting plate and the second connecting plate are perpendicularly connected, and the dust cover is connected to both the first connecting plate and the second connecting plate.

[0010] In one embodiment of the present invention, a first heat dissipation device is further included, which is disposed in the housing and is used to dissipate heat from the test module.

[0011] In one embodiment of the present invention, a second heat dissipation device is further included, which is disposed opposite to the first heat dissipation device along the radial direction of the housing.

[0012] In one embodiment of the present invention, the housing is provided with an installation port, and the first heat dissipation device and the second heat dissipation device are installed in the installation port; the first heat dissipation device and the second heat dissipation device include a fan.

[0013] In one embodiment of the present invention, the rotary connection unit further includes an anti-rotation component, one end of the rotary connector is connected to the housing, and the other end of the rotary connector is connected to the anti-rotation component; the anti-rotation component includes a first anti-rotation piece and a second anti-rotation piece disposed opposite to each other on the edge of the end face of the rotary connector, the first anti-rotation piece and the second anti-rotation piece extending radially along the rotary connector.

[0014] This invention also provides an online testing method for optical fiber attenuation performance. The method utilizes the online testing device for optical fiber attenuation performance described above, in conjunction with a production system, to perform online testing on the optical fiber under test. The optical fiber under test includes optical fibers in production. The online testing method for optical fiber attenuation performance includes: Step S1: Coaxially mount the fiber optic reel of the fiber under test and the online fiber attenuation performance testing device on the central rotating axis, and make the fiber optic reel tightly against the housing; fix the fiber optic reel to the central rotating axis; connect the production end of the fiber under test to the production system, and house the inner end of the fiber under test in the fiber optic reel; connect the inner end of the fiber under test to the testing module through a fiber optic coupler. Step S2: Start the test module, drive the central rotating shaft to rotate, and the control unit automatically performs an initial test on the attenuation performance and length index of the optical fiber under test. The test time is ≤1 second to calibrate the test system. Step S4: The production system presets the production length and test length, confirms the production parameters, and starts the fiber threading process. When the production length reaches the preset value, the production system sends a feedback signal to the control unit to perform attenuation performance testing on the produced optical fiber to be tested. In step S4, the rotational speed of the central rotating shaft is controlled to be ≤5 revolutions / s. Step S5: After the test is completed, cut off the fiber that has been tested, replace it with the next fiber reel, and repeat steps S1 to S4 to produce and test the next reel of fiber under test until all fiber under test is produced and tested.

[0015] The technical solution of the present invention has the following advantages compared with the prior art: The present invention discloses an online optical fiber attenuation performance testing device, comprising a support body, a rotating connection unit, a housing, a rotating shaft unit, a testing module, and a control unit. The testing module for testing the optical performance attenuation of optical fibers is integrated inside the housing, enabling online real-time attenuation performance testing of semi-finished or finished optical fibers. Signal transmission during rotation is achieved through the rotating connector of the rotating connection unit. Therefore, the present invention is applicable to various processes in optical fiber and cable production, enabling online testing of optical fiber attenuation performance indicators and parameters such as length during production. This helps manufacturers determine whether fiber breaks have occurred and pinpoint their location, reducing the risk of missed detections during manual testing, improving testing timeliness, avoiding batch accidents, and reducing manpower input, thereby lowering testing costs. Attached Figure Description

[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention.

[0018] Figure 2 This is a first-view structural schematic diagram of the housing and rotating connection unit of a preferred embodiment of the present invention.

[0019] Figure 3 This is a second-view structural schematic diagram of the housing and rotating connection unit of a preferred embodiment of the present invention.

[0020] Figure 4 This is a first-view exploded view of the structure of a preferred embodiment of the present invention.

[0021] Figure 5 This is a second-view exploded view of the structure of a preferred embodiment of the present invention.

[0022] Explanation of reference numerals in the accompanying drawings: 1. Support body; 2. Housing; 20. First through hole; 21. Base plate; 210. Second through hole; 22. Cover plate; 220. Third through hole; 221. Fixing buckle; 23. Connecting ring; 231. First connecting plate; 232. Second connecting plate; 233. Dust cover; 24. Connecting seat; 3. Rotary connector; 31. Outer rotating body; 32. Inner rotating body; 33. First anti-rotation plate; 34. Second anti-rotation plate; 4. Cable assembly; 41. First cable assembly; 410. First network cable; 411. First electrical signal line; 42. Second cable assembly; 420. Second network cable; 421. Second electrical signal line; 5. Central rotating shaft; 6. Test module; 71. First heat dissipation device; 72. Second heat dissipation device. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention. Example 1

[0024] Reference Figures 1 to 5 As shown, the present invention discloses an online testing device for optical fiber attenuation performance, which is used in conjunction with an optical fiber production system to perform online testing on optical fibers in production. The online testing device for optical fiber attenuation performance includes a support body 1.

[0025] The online optical fiber attenuation performance testing device also includes a housing 2, on which a first through hole 20 and a through hole are provided; the through hole is arranged along the axial direction of the housing 2, and the axis of the through hole overlaps with the central axis of the housing 2; The online fiber attenuation performance testing device also includes a rotary connection unit, which includes a rotary connector 3 and a cable assembly 4; the cable assembly 4 is assembled to the rotary connector; the rotary connector has a through mounting hole along the axial direction; The online fiber attenuation performance testing device also includes a rotating shaft unit, which includes a central rotating shaft 5. The central rotating shaft 5 is installed horizontally on the support body 1. The housing 2 is installed on the central rotating shaft 5 through the through hole. The rotating connector 3 is installed on the central rotating shaft 5 through the mounting hole.

[0026] It should be noted that the rotary connector 3 is coaxially connected to the housing 2, and the central rotating shaft is driven to rotate, thereby driving the housing 2 and part of the rotary connector 3 to rotate synchronously.

[0027] The online testing device for fiber attenuation performance also includes a testing unit, which includes a testing module 6 and a fiber coupler. The testing module 6 is housed in the housing, and the fiber under test is connected to the testing module 6 through the fiber coupler. The online fiber optic attenuation performance testing device also includes a control unit, which includes a test host. The test host is connected to the test module 6 via the cable assembly 4 to obtain the test data from the test module 6.

[0028] The testing process of this invention is roughly as follows: the online optical fiber attenuation performance testing device and the optical fiber reel 10 of the optical fiber under test are installed on the central rotating shaft 5; one end of the optical fiber under test is connected to the testing module 6 inside the housing 2 through the optical fiber coupler, and all wiring is completed through the cable assembly 4; the system is started, the central rotating shaft 5 is controlled to rotate, and it is linked with the production system. The produced optical fiber is wound and stored in the optical fiber reel. At the same time, the attenuation index of the optical fiber under test in production is tested in real time.

[0029] Therefore, it can be understood that the online optical fiber attenuation performance testing device protected by this invention includes a support body, a rotating connection unit, a housing, a rotating shaft unit, a testing module, and a control unit. The testing module for testing the optical fiber attenuation performance is integrated inside the housing, enabling online real-time attenuation performance testing of semi-finished or finished optical fibers. Signal transmission during rotation is achieved through the rotating connector of the rotating connection unit. Thus, this invention is applicable to various processes in optical fiber and cable production, enabling online testing of optical fiber attenuation performance indicators and parameters such as length during production. This helps manufacturers determine whether fiber breaks have occurred and pinpoint their location, reducing the risk of missed detections during manual testing, improving testing timeliness, avoiding batch accidents, and reducing manpower input, thereby lowering testing costs.

[0030] Specifically, the rotary connector 3 includes an outer rotating body 31 and an inner rotating body 32 arranged coaxially, and the mounting hole is formed at the center of the inner rotating body 32; during testing, the inner rotating body 32 is connected to the housing 2 and can rotate synchronously with the housing 2, while the outer rotating body 31 is fixed to the support body 1.

[0031] The cable assembly 4 includes a first cable assembly 41 and a second cable assembly 42. The first cable assembly 41 is mounted on the outer rotating body 31, and the second cable assembly 42 is mounted on the inner rotating body 32.

[0032] In a preferred embodiment, the first cable assembly 41 includes a first network cable 410 and a first electrical signal line 411, and the second cable assembly 42 includes a second network cable 420 and a second electrical signal line 421. Specifically, the first network cable 410 located on the outer rotating body 31 connects the test host and the test module 6, and the first electrical signal line 421 is used to connect to an external power supply; the second network cable 420 is connected to the test module 6, and the second electrical signal line 421 connects the test module 6 and the external power supply to supply power to the test module 6 and the heat dissipation structure inside the housing 2.

[0033] In a preferred embodiment, the housing 2 includes a base plate 21, a cover plate 22, a connecting ring 23, and a connecting seat 24. The base plate 21 and the cover plate 22 are spaced apart, and the connecting ring 23 connects the base plate 21 and the cover plate 22 respectively to form a cylindrical receiving space. The first through hole 20 is disposed in the connecting ring 23. Specifically, the through hole includes a second through hole 210 and a third through hole 220 disposed opposite to each other, wherein the second through hole 210 is disposed in the base plate 21, and the third through hole 220 is disposed in the cover plate 22. The rotary connector 3 is connected to the connecting seat 24 by a threaded connection. It should be noted that the cylindrical structure design of the housing 2 ensures good rotational symmetry during rotation, effectively reducing rotational resistance. Furthermore, when the cylindrical housing 2 is subjected to internal pressure, its circumferential stress is twice that of the axial stress, thus avoiding stress concentration, facilitating connection and installation, and making it easier to manufacture and seal from a production and manufacturing perspective.

[0034] Specifically, the radial dimension of the housing 2 is 280mm-300mm; preferably 300mm, so as to facilitate matching with a 265mm fiber optic disc.

[0035] In a preferred embodiment, the edges of the base plate 21 and the cover plate 22 are designed with a stepped structure to match the connecting ring 23, ensuring good parallelism between the base plate 21 and the cover plate 22 after assembly. In addition, the inner side of the connecting ring 23 is provided with 6 cylindrical positioning pin holes, and the 6 cylindrical positioning holes are distributed at equal angles on the inner edge of the connecting ring 23, which can fix the base plate 21 and the cover plate 22, and also act as reinforcing ribs to increase the overall structural strength of the shell 2.

[0036] The second through hole 210 on the base plate 21 adopts a lug design, with its center cooperating with the central rotation shaft 5. The lugs on both sides are used for the access of the second electrical signal line 421 and the second network cable 420, respectively.

[0037] In a preferred embodiment, the edge of the connecting ring 23 is recessed to form a recess, and the first through hole 20 is disposed in the recess.

[0038] In detail, the recess includes a first connecting plate 231, a second connecting plate 232, and a dust cover 233. The first connecting plate 231 and the second connecting plate 232 are perpendicularly connected to form an "L-shaped" notch structure. The dust cover 233 connects both the first connecting plate 231 and the second connecting plate 232, thereby preventing dust, impurities, and other foreign objects from entering the interior of the housing 2 during long-term production. This facilitates the installation of the fiber optic coupler in the recess during testing. One end of the fiber optic coupler is connected to the fiber under test, and the other end is connected to the test module 6. Specifically, the fiber optic coupler is connected to the test module 6 inside the housing 2, and the other end of the fiber optic coupler located outside the housing 2 is connected to the fiber under test.

[0039] This configuration ensures that during production, the connector of the fiber optic coupler can move along the tangential direction of the housing 2, avoiding excessive radial centrifugal force and thus preventing loosening at the connector between the fiber optic coupler and the fiber under test, thereby ensuring the stability of signal transmission.

[0040] Furthermore, in order to dissipate heat and cool down the test module 6 and the housing 2 in a timely manner, thereby ensuring the stability of signal transmission during long-term production, the online testing device also includes a first heat dissipation device 71 and a second heat dissipation device 72. The first heat dissipation device 71 is disposed on the housing 2 and is used to dissipate heat from the test module 6. The second heat dissipation device 72 is disposed opposite to the first heat dissipation device 71 in the radial direction of the housing 2 to ensure the uniformity of heat dissipation effect.

[0041] Furthermore, the housing 2 has a mounting opening, into which the first heat dissipation device 71 and the second heat dissipation device 72 are mounted; more specifically, the mounting opening is located on the base plate 21. The first heat dissipation device 71 and the second heat dissipation device 72 include, but are not limited to, fans.

[0042] The rotary connection unit further includes an anti-rotation component. One end of the rotary connector 3 is connected to the housing, and the other end of the rotary connector 3 is connected to the anti-rotation component. The anti-rotation plate 1 is used to fix the outer rotating body 31 of the rotary connector 3 to the support body 1. The support body 1 includes, but is not limited to, a wire feeder.

[0043] In detail, the anti-rotation assembly includes a first anti-rotation piece 33 and a second anti-rotation piece 34 disposed opposite to each other on the edge of the end face of the rotary connector 3. The first anti-rotation piece 33 and the second anti-rotation piece 34 are assembled on the outer rotating body 31, and the first anti-rotation piece 33 and the second anti-rotation piece 34 extend along the radial direction of the rotary connector 3. In this way, the outer rotating body 31 can be fixedly installed on the support body 1 by the first anti-rotation piece 33 and the second anti-rotation piece 34.

[0044] In a preferred embodiment, the cover plate 22 is further provided with a fixing buckle 221, which is used to fix the fiber optic reel 10 of the fiber under test. The fixing buckle 221 is arranged opposite to the cover plate 22 in the radial direction, so that the fiber optic reel 10 can be locked to the cover plate during the test, avoiding relative movement between the fiber optic reel 10 and the test device, and ensuring the accuracy of the test results.

[0045] After the overall assembly of the device is completed, it is tested by a professional dynamic balancing testing device. After passing the test, it is put into use. Given that the test module 8, the first heat dissipation device 71, the second heat dissipation device 72, the miniature plug-in board, various connecting wires and other accessories are integrated in the housing 2 of the test device, preferably, the rotation speed of the test device is ≤5 rpm to ensure the stability and reliability of the production process. Example 2

[0046] This invention also discloses an online testing method for optical fiber attenuation performance. The method utilizes the online testing device for optical fiber attenuation performance as described in Example 1, in conjunction with a production system, to perform online testing on the optical fiber under test. The optical fiber under test includes optical fibers in production. Figures 1 to 5 As shown, the online testing method for fiber optic attenuation performance includes: Step S1: The fiber optic disk 10 of the fiber to be tested and the online fiber attenuation performance testing device are coaxially mounted on the central rotating shaft 5, and the fiber optic disk 10 is tightly attached to the housing 2. The fiber optic disc 10 is fixed to the central rotating shaft 5. Specifically, the positioning hole on the fiber optic disc 10 is aligned with the fixing buckle 221 on the cover plate 22 of the housing 2, and the other disc surface of the fiber optic disc 10 is connected to the central rotating shaft 5 through the cooperation of a spring and a locking sleeve, thereby stably fixing the fiber optic disc 5.

[0047] The production end of the optical fiber under test is connected to the production system, and the inner end of the optical fiber under test is housed in the optical fiber tray 10; the inner end of the optical fiber under test is connected to the test module 6 through an optical fiber coupler. Step S2: Start the test module 6, drive the central rotating shaft 5 to rotate, and the control unit automatically performs an initial test on the attenuation performance and length index of the optical fiber under test. The test time is ≤1 second to calibrate the test system. In step S4, the control unit is linked with the production system. The production system presets the production length and test length, confirms the production parameters, and starts the fiber threading process for the optical fiber under test. The produced optical fiber under test is continuously wound onto the optical fiber reel 10. When the production length reaches the preset value, the production system sends a feedback signal to the control unit to perform attenuation performance testing on the optical fiber under test produced by the production system. Preferably, in step S4, the rotational speed of the central rotating shaft 5 is controlled to be ≤5 revolutions / s. Step S5: After the test is completed, cut off the fiber that has been tested, replace it with the next fiber reel, and repeat steps S1 to S4 to perform online testing on the next reel of fiber to be tested during production and production process until the production and testing of all fiber to be tested are completed.

[0048] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An online testing device for fiber optic attenuation performance, characterized in that: Used for synchronous testing of optical fibers in production, including... Support structure; A housing having a first through hole and a through hole; the through hole is arranged along the axial direction of the housing, and the axis of the through hole overlaps with the central axis of the housing; A rotary connection unit includes a rotary connector and a cable assembly; the cable assembly is assembled to the rotary connector; the rotary connector has a through mounting hole along the axial direction; A rotating shaft unit includes a central rotating shaft mounted horizontally on the support body, a housing mounted on the central rotating shaft through a through hole, and a rotating connector mounted on the central rotating shaft through a mounting hole, with the rotating connector coaxially connected to the housing; the central rotating shaft is driven to rotate, thereby driving the housing and part of the rotating connector to rotate synchronously. The test unit includes a test module and an optical fiber coupler. The test module is housed in the housing, and the optical fiber under test is connected to the test module through the optical fiber coupler. The control unit includes a test host, which is connected to the test module via the cable assembly to obtain test data from the test module.

2. The online testing device for fiber optic attenuation performance according to claim 1, characterized in that: The rotary connector includes an outer rotating body and an inner rotating body arranged coaxially. The inner rotating body is connected to the housing and can rotate synchronously with the housing. The cable assembly includes a first cable assembly and a second cable assembly. The first cable assembly is installed on the outer rotating body, and the second cable assembly is installed on the inner rotating body.

3. The online testing device for fiber optic attenuation performance according to claim 1, characterized in that: The housing includes a base plate, a cover plate, a connecting ring, and a connecting seat. The base plate and the cover plate are spaced apart, and the connecting ring connects the base plate and the cover plate to form a receiving space. The first through hole is provided in the connecting ring. The through hole includes a second through hole and a third through hole. The second through hole is provided in the base plate, and the third through hole is provided in the cover plate. The rotary connector is connected to the connecting seat.

4. The online testing device for fiber optic attenuation performance according to claim 1, characterized in that: The edge of the connecting ring is recessed to form a recessed portion, and the first through hole is disposed in the recessed portion.

5. The online testing device for fiber optic attenuation performance according to claim 4, characterized in that: The recessed portion includes a first connecting plate, a second connecting plate, and a dust cover. The first connecting plate and the second connecting plate are perpendicularly connected, and the dust cover connects both the first connecting plate and the second connecting plate.

6. The online testing device for fiber optic attenuation performance according to claim 1, characterized in that: It also includes a first heat dissipation device, which is disposed in the housing and is used to dissipate heat from the test module.

7. The online testing device for fiber optic attenuation performance according to claim 6, characterized in that: It also includes a second heat dissipation device, which is arranged opposite to the first heat dissipation device along the radial direction of the housing.

8. The online testing device for fiber optic attenuation performance according to claim 7, characterized in that: The housing has an installation port, and the first heat dissipation device and the second heat dissipation device are installed in the installation port; the first heat dissipation device and the second heat dissipation device include a fan.

9. An online testing device for fiber optic attenuation performance according to any one of claims 1-7, characterized in that: The rotary connection unit further includes an anti-rotation component. One end of the rotary connector is connected to the housing, and the other end of the rotary connector is connected to the anti-rotation component. The anti-rotation component includes a first anti-rotation piece and a second anti-rotation piece disposed opposite to each other on the edge of the end face of the rotary connector. The first anti-rotation piece and the second anti-rotation piece extend radially along the rotary connector.

10. An online testing method for optical fiber attenuation performance, characterized in that: Using the online testing device for optical fiber attenuation performance as described in any one of claims 1-9, and in conjunction with a production system, online testing is performed on the optical fiber under test, wherein the optical fiber under test includes optical fibers in production, and the online testing method for optical fiber attenuation performance includes: Step S1: Coaxially mount the fiber optic reel of the fiber under test and the online fiber attenuation performance testing device on the central rotating axis, and make the fiber optic reel tightly against the housing; fix the fiber optic reel to the central rotating axis; connect the production end of the fiber under test to the production system, and house the inner end of the fiber under test in the fiber optic reel; connect the inner end of the fiber under test to the testing module through a fiber optic coupler. Step S2: Start the test module, drive the central rotating shaft to rotate, and the control unit automatically performs an initial test on the attenuation performance and length index of the optical fiber under test. The test time is ≤1 second to calibrate the test system. Step S4: The production system presets the production length and test length, confirms the production parameters, and starts the fiber threading process. When the production length reaches the preset value, the production system sends a feedback signal to the control unit to perform attenuation performance testing on the produced optical fiber to be tested. In step S4, the rotational speed of the central rotating shaft is controlled to be ≤5 revolutions / s. Step S5: After the test is completed, cut off the fiber that has been tested, replace it with the next fiber reel, and repeat steps S1 to S4 to produce and test the next reel of fiber under test until all fiber under test is produced and tested.

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