A test system and method for simulating optical fiber transport

Abstract

The application belongs to the technical field of optical fiber quality detection, and discloses a kind of simulation optical fiber transport test system and method.The simulation optical fiber transport test system provided by the application comprises a fixing unit, a vibration test bench, an optical time domain reflectometer and a control evaluation unit.The fixing unit is installed on the vibration test bench, and the fixing unit is used to fix the disc-loaded optical fiber as a test object.The control evaluation unit is used to set vibration control information.The vibration test bench is used to generate multidirectional vibration according to the vibration control information, simulating the dynamic stress in the optical fiber transport environment.The optical time domain reflectometer is used to test the attenuation of the disc-loaded optical fiber before and after vibration start, respectively, to obtain reference attenuation information and test attenuation information.The control evaluation unit is used to obtain transport evaluation information according to the reference attenuation information and the test attenuation information.The application can reproduce the optical fiber product transport environment and quantitatively evaluate the optical fiber transport risk.

Description

Technical Field

[0001] This invention belongs to the field of optical fiber quality testing technology, and more specifically, relates to a test system and method for simulating optical fiber transportation. Background Technology

[0002] During transportation, optical fibers on reels are highly susceptible to multidimensional mechanical stresses in the transport environment, including low-frequency resonance, high-frequency impacts, random vibrations, and unexpected bending. These stresses can directly cause problems such as surface wiring disorder, stacking, and collapse in the finished optical fiber, leading to anomalies such as microcracks, macrobending loss, or loose connections. Ultimately, this results in an abnormal surge in optical signal attenuation, deterioration of the optical signal-to-noise ratio, and even link interruption. Such damage is insidious and gradual, often only discovered after transportation, causing significant economic losses and supply chain risks.

[0003] Traditional on-delivery inspection methods involve offline sampling tests after transportation, which cannot capture the attenuation evolution process in real time. Furthermore, it's difficult to distinguish whether attenuation anomalies are caused by transportation vibration, environmental temperature changes, or fiber manufacturing defects. Although optical time domain reflectometers (OTDRs) can achieve high-precision location of fiber link anomalies, they are currently mostly used for fiber optic cable production testing and subsequent routine network maintenance, and a systematic solution combining them with vibration testing equipment has not yet emerged. In summary, existing solutions are insufficient to meet the quantitative assessment needs of fiber optic manufacturers regarding fiber transportation risks. Summary of the Invention

[0004] This invention provides a test system and method for simulating optical fiber transportation, thereby solving the problem that existing technologies cannot quantitatively assess the risks of optical fiber transportation.

[0005] This invention provides a test system for simulating optical fiber transportation, comprising: a fixed unit, a vibration test bench, an optical time domain reflectometer, and a control and evaluation unit; The fixing unit is installed on the vibration test bench and is used to fix the disk-borne optical fiber, which is the test object. The disk-borne optical fiber, the optical time-domain reflectometer, and the control and evaluation unit are connected in sequence. The control and evaluation unit is used to set vibration control information. The vibration test bench is used to generate multi-directional vibration according to the vibration control information to simulate dynamic stress in the optical fiber transportation environment. The optical time-domain reflectometer is used to test the attenuation of the disk-borne optical fiber before and after vibration starts to obtain reference attenuation information and test attenuation information. The control and evaluation unit is used to obtain transportation evaluation information based on the reference attenuation information and the test attenuation information.

[0006] Preferably, the fixing unit includes: a bidirectional adjustment assembly and a guide positioning base; the vibration test bench includes: a support plate, a sliding column and a vibration table assembly; The bidirectional adjustment assembly is used to adapt to and fix disc-borne optical fibers of different specifications; the bidirectional adjustment assembly is mounted on the support plate via the guide positioning base; the vibration table assembly is connected to the support plate and is used to drive the support plate to generate multi-directional vibration; the multi-directional vibration includes: longitudinal vibration along the axis of the sliding column, and deflection oscillation perpendicular to the axis of the sliding column generated by the support plate based on the assembly gap between it and the sliding column.

[0007] Preferably, the bidirectional adjustment assembly includes: a movable clamping guard plate and a bidirectional adjustment screw; the bidirectional adjustment screw includes: a knob and a screw; the guide positioning base includes: a slider guide rail, a support plate connecting hole and a shock-absorbing base; Two movable clamping plates are respectively mounted on two slider guides, and a shock-absorbing base is provided below each slider guide. The support plate connection hole is located in the area between the two shock-absorbing bases. The screw is used to pass through the shaft hole of the disc-borne optical fiber and support the disc-borne optical fiber. The two knobs located at both ends of the screw are used to control the movement of the two movable clamping plates along their corresponding slider guides to adjust the position of the two movable clamping plates so that they clamp the disc-borne optical fiber.

[0008] Preferably, the type of the disk-borne optical fiber is single-mode optical fiber or multi-mode optical fiber, the length of the disk-borne optical fiber ranges from 2km to 100km, the flange size of the disk-borne optical fiber is from 50mm to 500mm, and the adjustment range between the two movable clamping guard plates is from 40mm to 700mm.

[0009] Preferably, the support platform includes: a platform surface, sliding column mounting holes, and fixed unit mounting columns; Multiple sliding column mounting holes are provided in the outer periphery of the platform, and the fixing unit mounting column is provided in the central area of ​​the platform; each sliding column passes through a sliding column mounting hole, and the size of the sliding column mounting hole is larger than the size of the sliding column; the fixing unit is fixed to the vibration test bench by assembling the fixing unit mounting column with the connecting hole of the support plate.

[0010] Preferably, the vibration table assembly includes: a motor drive mechanism and an air spring; The air spring is mounted on the base of the support platform; the motor drive mechanism is used to make the air spring respond according to the vibration control information, and drive the support platform to generate multi-directional vibration.

[0011] Preferably, the vibration control information is a sinusoidal vibration program or a random vibration program; in the sinusoidal vibration program, the set frequency range is 0 to 200 Hz, and the set amplitude range is 0 to 25 mm; in the random vibration program, the set frequency range is 0 to 200 Hz, and the set power spectrum range is 0 to 0.01 g. 2 / Hz.

[0012] Preferably, the control evaluation unit includes: a user interface and an alarm device; The user interface is used to set the vibration control information and to display the transportation assessment information; the alarm device is used to issue an abnormal alarm when the real-time difference between the test attenuation data and the reference attenuation data is greater than the alarm threshold.

[0013] Preferably, the pulse scanning frequency of the optical time domain reflectometer is 10s to 200s; and the alarm threshold is set within the range of 0.01dB / km to 0.05dB / km.

[0014] On the other hand, the present invention provides a test method for simulating optical fiber transportation, implemented using the aforementioned test system for simulating optical fiber transportation, the test method for simulating optical fiber transportation comprising: The disk-mounted optical fiber, which is the test object, is fixed using a fixing unit, and the disk-mounted optical fiber, optical time domain reflectometer, and control evaluation unit are connected in sequence. Before vibration is started, the initial attenuation of the disk-borne optical fiber is tested using the optical time domain reflectometer to obtain reference attenuation information. Vibration control information is set through the control and evaluation unit; multi-directional vibration is generated by the vibration test bench according to the vibration control information to simulate dynamic stress in the optical fiber transportation environment; and the attenuation change of the disk-borne optical fiber is monitored in real time by the optical time domain reflectometer to obtain test attenuation information. The control evaluation unit uses the baseline attenuation information and the test attenuation information to obtain transportation evaluation information.

[0015] One or more technical solutions provided in this invention have at least the following technical effects or advantages: This invention provides a test system for simulating optical fiber transportation, including a fixing unit, a vibration test bench, an optical time-domain reflectometer (OTDR), and a control and evaluation unit. Based on the above test system, this invention also provides a corresponding test method. First, the fixing unit secures the disc-mounted optical fiber (the test object), and the disc-mounted optical fiber, the OTD, and the control and evaluation unit are connected sequentially. Then, before vibration is initiated, the OTD tests the initial attenuation of the disc-mounted optical fiber to obtain baseline attenuation information. Next, the control and evaluation unit sets vibration control information. The vibration test bench generates multi-directional vibrations based on the vibration control information to simulate dynamic stress in the optical fiber transportation environment. The OTD monitors the attenuation changes of the disc-mounted optical fiber in real time to obtain test attenuation information. Finally, the control and evaluation unit obtains transportation evaluation information based on the baseline attenuation information and the test attenuation information. In other words, this invention provides a simple, easy-to-operate, and quantifiable optical fiber transportation simulation test scheme. By simulating the real transportation environment through a vibration test bench and combining it with an OTD to achieve real-time monitoring of optical fiber attenuation, it can comprehensively evaluate the performance stability of optical fiber under dynamic loads. This invention can reproduce the transportation environment of optical fiber products and can quantitatively assess the risks of optical fiber transportation. This invention is applicable to quality control in the optical fiber manufacturing and transportation industries, and is particularly suitable for verifying the mechanical reliability of conventional communication optical fibers in logistics transportation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a test system for simulating optical fiber transportation provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the fixed unit and vibration test bench in a test system for simulating optical fiber transportation provided in Embodiment 1 of the present invention; Figure 3 This is a top view of a vibration test bench in a test system for simulating optical fiber transportation provided in Embodiment 1 of the present invention; Figure 4 This is a top view of a fixed unit in a test system for simulating optical fiber transportation provided in Embodiment 1 of the present invention; Figure 5 This is a real-time attenuation trend graph of the optical fiber on the disk in Embodiment 2 of the present invention; Figure 6 This is a graph showing the real-time attenuation trend of the optical fiber on the disk in Embodiment 3 of the present invention.

[0017] Among them: 1-fixed unit, 2-vibration test bench, 3-optical time domain reflectometer, 4-control and evaluation unit, 5-disk-mounted optical fiber; 11-Bidirectional adjustment assembly; 12-Guide positioning base; 111 - Movable clamping guard plate; 112 - Bidirectional adjusting screw; 121-Slider guide rail, 122-Support plate connection hole, 123-Shock-absorbing base; 1121 - Knob, 1122 - Screw; 21-Supporting platform, 22-Sliding column, 23-Vibration table assembly; 211-Tabletop, 212-Sliding column mounting hole, 213-Fixed unit mounting column; 231 - Motor drive mechanism; 232 - Air spring; 41 - User interface; 42 - Alarm device. Detailed Implementation

[0018] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0019] Example 1: Example 1 provides a test system for simulating optical fiber transportation, see [link to example]. Figures 1 to 4 The system includes: a fixing unit 1, a vibration test bench 2, an optical time-domain reflectometer 3, and a control and evaluation unit 4. The fixing unit 1 is mounted on the vibration test bench 2 and is used to fix the disk-mounted optical fiber 5, which is the test object. The disk-mounted optical fiber 5, the optical time-domain reflectometer 3, and the control and evaluation unit 4 are connected in sequence. The control and evaluation unit 4 is used to set vibration control information. The vibration test bench 2 is used to generate multi-directional vibration according to the vibration control information to simulate dynamic stress in the optical fiber transportation environment. The optical time-domain reflectometer 3 is used to test the attenuation of the disk-mounted optical fiber before and after vibration initiation, respectively, to obtain reference attenuation information and test attenuation information. The control and evaluation unit 4 is used to obtain transportation evaluation information based on the reference attenuation information and the test attenuation information.

[0020] The fixing unit 1 is a sliding fixing structure to match and test various specifications of optical fiber trays (i.e., tray-mounted optical fiber 5); the vibration test bench 2 is designed as a movable table structure.

[0021] Specifically, the fixing unit 1 includes a bidirectional adjustment component 11 and a guide positioning base 12. The vibration test bench 2 includes a support plate 21, a sliding column 22, and a vibration table assembly 23. The bidirectional adjustment component 11 is used to adapt to and fix disc-borne optical fibers 5 of different specifications; the bidirectional adjustment component 11 is mounted on the support plate 21 through the guide positioning base 12; the vibration table assembly 23 is connected to the support plate 21 and is used to drive the support plate 21 to generate multi-directional vibration; the multi-directional vibration includes longitudinal vibration along the axis of the sliding column 22, and deflection oscillation perpendicular to the axis of the sliding column 22 generated by the support plate 21 based on the assembly gap between it (i.e., the support plate 21) and the sliding column 22. That is, the vibration direction includes longitudinal, transverse, and combined vibration, which can cover the multi-directional force scenarios in the actual transportation of optical fibers.

[0022] Specifically, the bidirectional adjustment assembly 11 includes a movable clamping guard plate 111 and a bidirectional adjustment screw 112. The bidirectional adjustment screw 112 includes a knob 1121 and a screw 1122. The guide positioning base 12 includes a slider guide rail 121, a support platform connecting hole 122, and a shock-absorbing base 123. Two movable clamping plates 111 are respectively mounted on two slider guide rails 121. Each slider guide rail 121 has a shock-absorbing base 123 below it. The support plate connection hole 122 is located in the area between the two shock-absorbing bases 123. The screw 1122 is used to pass through the shaft hole of the disc-borne optical fiber 5 and support the disc-borne optical fiber 5. The two knobs 1121 located at both ends of the screw 1122 are used to control the movement of the two movable clamping plates 111 along their corresponding slider guide rails 121 to adjust the position of the two movable clamping plates 111 so that they clamp the disc-borne optical fiber 5.

[0023] Specifically, the support platform 21 includes: a platform surface 211, sliding column mounting holes 212, and fixed unit mounting columns 213. Multiple sliding column mounting holes 212 are disposed in the outer periphery of the platform surface 211, and the fixed unit mounting columns 213 are disposed in the central region of the platform surface 211. For example, four sliding column mounting holes 212 can be disposed in the four corner regions of the platform surface 211. Each sliding column 22 passes through one sliding column mounting hole 212, and the size (e.g., diameter) of the sliding column mounting hole 212 is larger than the size of the sliding column 22, with the spatial gap between them supporting the flexible movement of the support platform 21. The fixed unit 1 is fixed to the vibration test bench 2 by assembling the fixed unit mounting column 213 with the connection hole 122 of the support platform (i.e., docking the two).

[0024] Specifically, the vibration table assembly 23 includes a motor drive mechanism 231 and an air spring 232. The air spring 232 is mounted on the base of the support plate 21. The motor drive mechanism 231 is used to cause the air spring 232 to respond according to the vibration control information, driving the support plate 21 to generate multi-directional vibration. The motor drive mechanism 231 is connected to the control evaluation unit 4, and therefore can execute the corresponding vibration program. That is, according to the set vibration program, the motor drive mechanism 231 can respond to the corresponding amplitude and frequency, directly acting on the air spring 232, thereby causing the longitudinal vibration of the support plate 21. Due to the spatial gap between the support plate 21 and the sliding column 22, it is endowed with the ability to swing laterally, thus realistically simulating the transportation environment. The air spring 232 is a rubber airbag with compressed air, which can respond very accurately to the vibration program (by adjusting the stiffness / height through air pressure to match the motor vibration parameters).

[0025] The control and evaluation unit 4, serving as the central control system, primarily executes vibration control and evaluation analysis steps. Furthermore, the control and evaluation unit 4 may include a user interface 41 and an alarm device 42. The user interface 41 is used to set the vibration control information and display the transportation evaluation information. That is, the user interface 41 is mainly used for parameter setting and result visualization. The alarm device 42 is used to issue an abnormal alarm when the real-time difference between the test attenuation data and the reference attenuation data exceeds an alarm threshold. In other words, the alarm device 42 can trigger an alarm when an attenuation anomaly is detected.

[0026] Overall, in Embodiment 1, the fixed unit 1 integrates an adjustable clamping device and a shock absorption function; the vibration test bench 2 is equipped with a frequency adjustment motor and a movable support plate to realize multi-directional vibration of the fiber optic disk; the optical time domain reflectometer 3 is connected to the control and evaluation unit 4 to realize real-time data acquisition and processing.

[0027] The type of the disk-borne optical fiber 5 can be conventional single-mode or multi-mode optical fiber, and its parameters meet the requirements of the national standard GB / T. The length of the disk-borne optical fiber 5 ranges from 2km to 100km, and the flange size of the disk-borne optical fiber 5 ranges from 50mm to 500mm. Correspondingly, the adjustment range between the two movable clamping guard plates 111 can be from 40mm to 700mm.

[0028] The vibration control information can be a sinusoidal vibration program, a random vibration program, etc., with corresponding program parameters set according to the complexity of the transportation scenario to simulate different transportation conditions. For example, in the sinusoidal vibration program, the set frequency range is 0 to 200 Hz, and the set amplitude range is 0 to 25 mm; in the random vibration program, the set frequency range is 0 to 200 Hz, and the set power spectrum range is 0 to 0.01 g. 2 / Hz.

[0029] The pulse scanning frequency of the optical time-domain reflectometer 3 is from 10 s to 200 s. If the vibration program is set to sinusoidal vibration, the pulse scanning frequency can be set from 10 s to 200 s. The actual setting value can be adjusted according to the amplitude. When the amplitude is set to a smaller value, the pulse scanning frequency of the optical time-domain reflectometer 3 can be slowed down; when the amplitude is set to a larger value, the pulse scanning frequency of the optical time-domain reflectometer 3 can be accelerated to match the observation of fiber dynamic attenuation under different amplitude conditions. If the vibration program is set to random vibration, the pulse scanning frequency is fixed, with a range of 10 s to 50 s, to observe the fiber dynamic attenuation during a completely random vibration process.

[0030] The alarm threshold is set within the range of 0.01 dB / km to 0.05 dB / km. Specifically, under ideal conditions, the appearance and attenuation of the coiled fiber remain unchanged compared to its ground state. However, in reality, due to vibration, the coiled fiber's cabling configuration changes, leading to attenuation fluctuations. Therefore, the attenuation difference relative to the ground state is specified not to exceed a required value, set within the range of 0.01 dB / km to 0.05 dB / km. If within the required value, the attenuation change is considered to be caused by normal cabling variations; if it exceeds the required value, the anomaly is considered to be caused by additional losses (including macro-bending loss, micro-bending loss, micro-cracks, etc.) due to coiled fiber cabling disorder, and this anomaly will trigger an alarm. Furthermore, after the experiment, the fiber appearance can be further compared to determine if it meets the shipping requirements.

[0031] Based on Example 1, two specific disk-borne optical fibers were used as test objects for testing. Examples 2 and 3 are given below for illustration.

[0032] Example 2: Example 2: The selected fiber optic cable for testing was a wavelength-extended non-dispersion-shifted single-mode fiber G.652.D with a length of 50km and a corresponding fiber optic cable flange size of 200mm. Before testing, the fiber optic cable was observed to be well-laid out and had no visible defects.

[0033] The control evaluation unit selected sinusoidal vibration as the program, fixed the vibration frequency at 20Hz, set the initial vibration amplitude to 0.5mm, and increased the amplitude by 0.3mm every 30 minutes until it reached 2mm, for a total vibration time of 180 minutes. This process simulated progressive transport stress. The pulse scanning frequency setting of the optical time domain reflectometer was adjusted according to the amplitude, with an initial pulse scanning frequency of 100s, decreasing by 10s every 30 minutes until a pulse of 50s was reached.

[0034] The initial attenuation of G.652.D fiber in the 1550nm band was tested using an optical time-domain reflectometer, and the result was 0.19dB / km, which was taken as the ground state. The vibration test bench was then used for formal experiments, and the attenuation change of the disk-mounted fiber was observed and recorded in real time during the vibration process. If the change value exceeded 0.03dB / km, an alarm system was triggered.

[0035] The decay changes during the test process are shown in the figure. Figure 5 The attenuation increased with the increase of amplitude, with the maximum attenuation change value being 0.02dB / km. After the test, the optical fiber was removed from the fixed unit and its appearance was observed and analyzed. No abnormalities were found.

[0036] Example 3: In Example 3, the selected disk-borne fiber type was still wavelength-extended non-dispersion-shifted single-mode fiber G.652.D, with a length of 25km and a corresponding fiber disk flange size of 150mm. Before the test, the disk-borne fiber was observed to be well-laid out and had no appearance defects.

[0037] The control evaluation unit selected random vibration as the program, with the vibration frequency range set to 3 Hz to 100 Hz and the power spectrum range set to 10 Hz. -5 g 2 / Hz to 0.01g 2 The power spectral density range was adjusted according to the required transport verification environment, and the vibration time was 180 min. The pulse scan frequency of the optical time domain reflectometer was set to 10 s to observe the dynamic attenuation of the optical fiber during the fully random vibration process.

[0038] The initial attenuation of G.652.D fiber in the 1550nm band was tested using an optical time-domain reflectometer, and the result was 0.19dB / km, which was taken as the ground state. The vibration test bench was then used for formal experiments, and the attenuation change of the disk-mounted fiber was observed and recorded in real time during the vibration process. If the change value exceeded 0.03dB / km, an alarm system was triggered.

[0039] The decay changes during the test process are shown in the figure. Figure 6 The maximum attenuation change was 0.01 dB / km. After the test, the optical fiber was removed from the fixed unit and its appearance was observed and analyzed. No abnormalities were found.

[0040] Example 4: Example 4 provides a test method for simulating optical fiber transportation, which is implemented using the test system for simulating optical fiber transportation as described in Example 1.

[0041] The test method for simulating optical fiber transportation provided in Example 4 mainly includes the following steps: S1. Fix the disk-mounted optical fiber, which is the test object, using the fixing unit, and connect the disk-mounted optical fiber, optical time domain reflectometer, and control evaluation unit in sequence.

[0042] S2. Before vibration is started, the initial attenuation of the optical fiber on the disk is tested using the optical time domain reflectometer to obtain reference attenuation information.

[0043] If the fiber under test is single-mode fiber, the test band is 1550nm or 1625nm; if the fiber under test is multimode fiber, the test band is 850nm or 1300nm. The initial attenuation of the selected disk-mounted fiber must meet or exceed national standards.

[0044] S3. Set vibration control information through the control and evaluation unit; generate multi-directional vibration using a vibration test bench according to the vibration control information to simulate dynamic stress in the optical fiber transportation environment; monitor the attenuation change of the disk-mounted optical fiber in real time using the optical time domain reflectometer to obtain test attenuation information.

[0045] In the test process including S2 and S3, the optical time domain reflectometer fixes the pulse scanning frequency, collects the corresponding backscattered signal, generates the corresponding specific wavelength attenuation of the disk-mounted optical fiber in real time, and uploads the corresponding data points to the control and evaluation unit.

[0046] During the S3 test, the required vibration mode program is set, and the vibration test bench is started. The multi-directional vibration generated by its operation simulates the dynamic stress in the transportation environment. The optical fiber attenuation change is monitored in real time using the optical time-domain reflectometer (OTDR) to ensure timely and accurate data capture. Real-time monitoring may include generating an attenuation curve using the OTD and identifying performance inflection points through time series analysis. If the real-time test wavelength exceeds a certain range of the reference attenuation during the test, an alarm system is triggered, and the anomaly is recorded. Data can also be synchronized to a database to support comparative analysis of subsequent batch tests. The test time can be set, and the test automatically ends after the preset time.

[0047] S4. Using the control evaluation unit, transportation evaluation information is obtained based on the baseline attenuation information and the test attenuation information.

[0048] Furthermore, before fixing the disk-mounted optical fiber (i.e., before performing S1), an appearance inspection can be performed on the optical fiber to select disk-mounted optical fibers that meet industry standards and have a good appearance (e.g., good initial surface cabling and no damage). After the test is completed, a comparison of changes in the appearance of the disk-mounted optical fiber can also be included.

[0049] After testing, the dynamic stability can be assessed by comparing the attenuation trend during the test. The appearance of the fiber surface can also be checked for any abnormalities after testing. In other words, the evaluation steps can include dynamic attenuation changes and visual inspection, marking risk areas and providing improvement suggestions, which is applicable to quality control processes.

[0050] Example 4 can simulate the transportation of optical fibers under different conditions. By combining optical fiber fixing and real-time monitoring technology, the dynamic performance of optical fibers can be comprehensively evaluated through multi-directional vibration and different vibration programs.

[0051] Since the test method for simulating optical fiber transportation provided in Example 4 corresponds to the functions of each device in the test system for simulating optical fiber transportation provided in Example 1, Example 4 can be understood by referring to the description of Example 1, and will not be repeated here.

[0052] In summary, this invention utilizes the vibration table components within the vibration test bench to provide different vibration modes. Combined with the flexible and movable design of the support plate, it can simulate the vibration of optical fiber samples in a transportation environment, providing a more realistic logistics and transportation environment for verifying the reliability of optical fiber performance. The fixing unit in this invention adopts a sliding structure design, which can adapt to different specifications of optical fiber reels; and the bidirectional adjusting screw can avoid additional attenuation caused by human factors, ensuring stability during the testing process and improving the reliability and repeatability of test results. This invention uses an optical time-domain reflectometer to monitor the attenuation changes of the reel-mounted optical fiber in real time, realizing dynamic tracking of attenuation changes during vibration and timely alarming of abnormal points; through visualized dynamic monitoring, the timeliness and accuracy of problem analysis are greatly improved. This invention can reproduce the vibration environment in various scenarios without actual transportation, and the test method and equipment design are simple and easy to operate. This invention has the advantages of realistically reproducing the transportation environment of optical fiber products, accurate and reliable testing, good timeliness, good repeatability, low deployment difficulty, and low cost. It can assess the impact of the transportation process on the quality of optical fiber and quantitatively evaluate the risks of optical fiber transportation.

[0053] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A test system for simulating optical fiber transportation, characterized in that, include: Fixed unit, vibration test bench, optical time domain reflectometer, and control and evaluation unit; The fixing unit is installed on the vibration test bench and is used to fix the disk-borne optical fiber, which is the test object. The disk-borne optical fiber, the optical time domain reflectometer, and the control and evaluation unit are connected in sequence. The control and evaluation unit is used to set vibration control information. The vibration test bench is used to generate multi-directional vibration according to the vibration control information to simulate the dynamic stress in the optical fiber transportation environment. The optical time domain reflectometer is used to test the attenuation of the disk-borne optical fiber before and after vibration starts to obtain reference attenuation information and test attenuation information. The control evaluation unit is used to obtain transportation evaluation information based on the baseline attenuation information and the test attenuation information.

2. The test system for simulating optical fiber transportation according to claim 1, characterized in that, The fixing unit includes: a bidirectional adjustment component and a guide positioning base; the vibration test bench includes: a support plate, a sliding column and a vibration table assembly. The bidirectional adjustment assembly is used to adapt to and fix disc-borne optical fibers of different specifications; the bidirectional adjustment assembly is mounted on the support plate via the guide positioning base; the vibration table assembly is connected to the support plate and is used to drive the support plate to generate multi-directional vibration; the multi-directional vibration includes: longitudinal vibration along the axis of the sliding column, and deflection oscillation perpendicular to the axis of the sliding column generated by the support plate based on the assembly gap between it and the sliding column.

3. The test system for simulating optical fiber transportation according to claim 2, characterized in that, The bidirectional adjustment assembly includes: a movable clamping guard plate and a bidirectional adjustment screw; the bidirectional adjustment screw includes: a knob and a screw; the guide positioning base includes: a slider guide rail, a support plate connection hole and a shock-absorbing base; Two movable clamping plates are respectively mounted on two slider guides, and a shock-absorbing base is provided below each slider guide. The support plate connection hole is located in the area between the two shock-absorbing bases. The screw is used to pass through the shaft hole of the disc-borne optical fiber and support the disc-borne optical fiber. The two knobs located at both ends of the screw are used to control the movement of the two movable clamping plates along their corresponding slider guides to adjust the position of the two movable clamping plates so that they clamp the disc-borne optical fiber.

4. The test system for simulating optical fiber transportation according to claim 3, characterized in that, The type of the optical fiber on the disc is single-mode optical fiber or multimode optical fiber, the length of the optical fiber on the disc ranges from 2km to 100km, and the flange size of the optical fiber on the disc ranges from 50mm to 500mm; the adjustment range between the two movable clamping plates is from 40mm to 700mm.

5. The test system for simulating optical fiber transportation according to claim 3, characterized in that, The support platform includes: a platform surface, sliding column mounting holes, and fixed unit mounting columns; Multiple sliding column mounting holes are provided in the outer periphery of the platform, and the fixing unit mounting column is provided in the central area of ​​the platform; each sliding column passes through a sliding column mounting hole, and the size of the sliding column mounting hole is larger than the size of the sliding column; the fixing unit is fixed to the vibration test bench by assembling the fixing unit mounting column with the connecting hole of the support plate.

6. The test system for simulating optical fiber transportation according to claim 2, characterized in that, The vibration table assembly includes: a motor drive mechanism and an air spring; The air spring is mounted on the base of the support platform; the motor drive mechanism is used to make the air spring respond according to the vibration control information, and drive the support platform to generate multi-directional vibration.

7. The test system for simulating optical fiber transportation according to claim 6, characterized in that, The vibration control information is either a sinusoidal vibration program or a random vibration program; in the sinusoidal vibration program, the set frequency range is 0 to 200 Hz, and the set amplitude range is 0 to 25 mm; in the random vibration program, the set frequency range is 0 to 200 Hz, and the set power spectrum range is 0 to 0.01 g. 2 / Hz.

8. The test system for simulating optical fiber transportation according to claim 6, characterized in that, The control evaluation unit includes: a user interface and an alarm device; The user interface is used to set the vibration control information and to display the transportation assessment information; the alarm device is used to issue an abnormal alarm when the real-time difference between the test attenuation data and the reference attenuation data is greater than the alarm threshold.

9. The test system for simulating optical fiber transportation according to claim 8, characterized in that, The pulse scanning frequency of the optical time domain reflectometer is from 10s to 200s; the alarm threshold is set from 0.01dB / km to 0.05dB / km.

10. A test method for simulating optical fiber transportation, characterized in that, The test method for simulating optical fiber transport, implemented using the test system for simulating optical fiber transport as described in any one of claims 1 to 9, comprises: The disk-mounted optical fiber, which is the test object, is fixed using a fixing unit, and the disk-mounted optical fiber, optical time domain reflectometer, and control evaluation unit are connected in sequence. Before vibration is started, the initial attenuation of the disk-borne optical fiber is tested using the optical time domain reflectometer to obtain reference attenuation information. Vibration control information is set through the control and evaluation unit; multi-directional vibration is generated by the vibration test bench according to the vibration control information to simulate dynamic stress in the optical fiber transportation environment; and the attenuation change of the disk-borne optical fiber is monitored in real time by the optical time domain reflectometer to obtain test attenuation information. The control evaluation unit uses the baseline attenuation information and the test attenuation information to obtain transportation evaluation information.

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