Device and method for testing multifunctional performance of optical fiber

Abstract

The invention discloses an optical fiber multifunctional performance testing device and testing method, and belongs to the technical field of optical fiber testing. According to the method, multi-dimensional test parameters such as differential mode time delay, optical fiber screening, tensile strength and the like are set, logic verification is carried out, equipment connection and core component states of a test system are checked, optical fiber ends are preprocessed, various performance tests are carried out according to a preset sequence, data are collected in real time, abnormities are eliminated, timestamps are marked, and the test efficiency is improved. After effective data are stored and summarized, a result is generated through a comprehensive evaluation algorithm, and consistency is verified; the device comprises a plurality of core test devices which are arranged along an optical fiber transmission path and communicate with a computer integrated system to realize two-way transmission of a control instruction and test data. Data transmission verification, equipment cooperation and data tracing and redisk mechanisms are integrated in the testing process, and different testing requirements are met. According to the method, comprehensive and efficient testing of the multi-dimensional performance of the optical fiber is achieved, the orderliness of the testing process, the data accuracy and the evaluation reliability are improved, the whole testing process is traceable, and powerful support is provided for optical fiber quality control.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical fiber testing, in particular to an optical fiber multifunctional performance testing device and testing method. BACKGROUND

[0002] With the rapid development of optical fiber communication, optical fiber sensing and other fields, the application scenarios of optical fibers are continuously expanding, and the testing requirements for multi-dimensional indexes such as transmission characteristics, physical structure integrity, and mechanical properties of optical fibers are increasingly urgent. At present, a variety of testing technologies for single performance of optical fibers have been formed in the industry, covering transmission parameter testing, surface quality detection, mechanical strength testing, etc. At the same time, various special testing equipment has emerged, and some of the equipment has basic data acquisition and preliminary analysis functions, providing certain support for optical fiber quality control. The comprehensive testing scheme integrating multiple testing functions has gradually become the development trend of the industry.

[0003] There are still many problems to be solved in the current optical fiber testing technology: first, the test parameter setting lacks systematic logical verification mechanism, and the parameters are prone to conflict, and there is no standardized adjustment process, which affects the effectiveness of the test; second, the system state check before the test and the optical fiber pretreatment lack standard process, the device connection stability and the running state of the core components are not accurately matched with the test parameters, and the defects at the end of the optical fiber are easy to introduce test errors; third, the sequence of multiple performance tests lacks scientific planning, and the unreasonable test process is easy to cause data cross interference or test interruption; fourth, the data acquisition, screening, analysis and evaluation links do not form a closed loop, the abnormal data is not timely excluded, and the comprehensive evaluation conclusion lacks consistency verification with the original data, affecting the reliability of the test results. These problems lead to the lack of orderliness, data accuracy and evaluation reliability of the existing test process, making it difficult to fully and efficiently reflect the comprehensive performance of the optical fiber. SUMMARY

[0004] The purpose of the present application is to overcome one or more deficiencies in the prior art and provide an optical fiber multifunctional performance testing device and testing method.

[0005] The purpose of the present application is achieved by the following technical solutions: An optical fiber multifunctional performance testing method is provided, which comprises the following steps: S1. Set the optical pulse parameters of the differential mode time delay test, the tension or strain parameters of the optical fiber screening test, the number of times of the tensile strength test, and the tensile speed parameters, perform logical verification on these parameters, confirm that they meet the optical fiber performance testing technical specifications, and if there is an abnormality, issue an adjustment prompt until the verification is passed; S2. According to the test parameters passed by the check, check the connection state of each device of the test system and the operation stability of the optical signal receiving part and the tension detection part, and at the same time, clean the end of the optical fiber to remove impurities and damage, and ensure that the optical fiber meets the test connection requirements; S3. Perform each performance test in the preset order of differential mode delay test, optical fiber warping test, optical fiber screening test and tensile strength test, use the running stable equipment to collect the performance data of each test in real time, and remove the abnormal data obviously beyond the reasonable range in the collection process, and mark the effective data with time stamp; S4. Store, aggregate and analyze the effective data marked with time stamp, generate the comprehensive performance evaluation result of the optical fiber through the preset comprehensive evaluation algorithm, verify the consistency of the evaluation conclusion and the effective data, if there is a contradiction, reanalyze until the conclusion is consistent, and then output the evaluation result.

[0006] Further, the specific process of the differential mode delay test is: generating a narrow pulse optical signal according to the set optical pulse parameters and injecting it into the optical fiber, receiving different mode optical signals transmitted by the optical fiber and converting them into electrical signals; waveform analysis is performed on the electrical signals, and the waveform feature points of different mode optical signals are extracted; the arrival time difference of different mode optical signals is measured according to the waveform feature points, and the differential mode delay data is calculated and obtained, which is used as effective data for subsequent aggregation and analysis.

[0007] Further, the specific process of the optical fiber warping test is: a laser beam with specific wavelength and intensity is used to irradiate the test area of the optical fiber, and the scattering light distribution and intensity parameters caused by the warping of the optical fiber are detected in real time; the collected scattering light parameters are subjected to noise reduction processing, the warping degree of the optical fiber is calculated through a preset algorithm model, and the generated warping data is used as effective data for subsequent comprehensive evaluation.

[0008] Further, the specific process of the optical fiber screening test is: a stable force is applied to the optical fiber according to the set tension or strain parameters, and the speed of the optical fiber is controlled to match the rhythm of the force; the surface defects of the optical fiber under stress are detected, including: recording the position, size and type, diameter uniformity, and diameter change and refractive index change under different tension conditions; the detection data is aggregated to generate screening data, which is used as effective data for subsequent analysis.

[0009] Further, the specific process of the tensile strength test is: S31: The optical fiber is stretched at a constant and stable speed according to the set stretching speed, the tension data in the stretching process is collected in real time, and the tension change curve is recorded, and the tension data is marked with time stamp as effective data; S32: After completing a single stretching test, the optical fiber conveying and screening operations are paused, and the stretching state is reset to prepare for the next test; S33: repeat the stretching operation until the set number of tests is completed; S34: aggregate the tension data of all stretching tests, extract the maximum tension value and the breaking tension value (if present) of each stretching, and supplement the results to the effective data set.

[0010] Further, when conducting various performance tests, data transmission verification and equipment coordination steps are also included: S35: When the test equipment transmits the collected effective data to the data processing unit, the data integrity and accuracy are verified according to the preset verification rules. If data loss or errors are found, the equipment is triggered to re-collect and transmit effective data; S36: When switching different test items, send coordination instructions to related equipment to ensure that the previous test equipment suspends effective data collection, and the next test equipment starts testing to avoid data cross interference; S37: Real-time monitoring of the receiving and storage state of the data processing unit to the effective data, if the storage capacity is insufficient or the receiving is delayed, timely warning and suspension of testing, after troubleshooting, resume effective data collection and testing process.

[0011] Further, after generating the comprehensive performance evaluation results, the test data tracing and abnormal review steps are also included: S41: Establish an associated tracing system for each effective data and corresponding test parameters, equipment running state, and environmental conditions, support reverse query of original effective data and test process record through evaluation results; S42: For the "to be confirmed" data item in the evaluation results, call the equipment running log of the corresponding test link to review whether there is operation deviation or equipment abnormality causing data problems in the test process; S43: Generate an abnormal data processing report according to the review results, clarify the abnormal reasons and improvement measures, and update to the optical fiber performance evaluation database simultaneously, provide reference for subsequent test parameter setting, equipment inspection and data collection.

[0012] A multifunctional performance testing device for optical fibers, the device includes an optical fiber screening device, an optical fiber automatic winding device, a tensile strength device, an optical fiber warping device, a high-speed optical detector, an oscilloscope, and a computer integrated system. The fiber optic screening device, automatic fiber winding device, tensile strength device, fiber warping device, and high-speed photodetector are arranged sequentially along the fiber optic transmission path to achieve sequential, interference-free testing of the fiber optics. The fiber optic screening device, automatic fiber winding device, tensile strength device, fiber warping device, high-speed photodetector, and oscilloscope are all connected to the computer integrated system via data transmission lines, enabling bidirectional transmission of control commands and real-time feedback of test data. A dedicated data connection channel is provided between the oscilloscope and the high-speed photodetector to receive the electrical signal converted by the high-speed photodetector.

[0013] Furthermore, the fiber optic screening device includes a high-precision optical sensor and a size measuring device, both of which communicate with a computer integrated system; The high-precision optical sensor is used to detect surface defects in the optical fiber, and the size measuring device is used to detect the uniformity of the optical fiber diameter and the diameter and refractive index changes under different tension conditions. The detection data is transmitted to the computer integrated system in real time as an effective data acquisition source.

[0014] Furthermore, the automatic fiber winding device includes a motor-driven winding shaft, a tension adjustment mechanism, and a fiber guiding device. The motor-driven winding shaft is used to wind and release the optical fiber. The tension adjustment mechanism is used to adjust the tension on the optical fiber in real time. The optical fiber guiding device is used to prevent bending or tangling of the optical fiber during winding. The automatic optical fiber winding device receives control commands from the computer integrated system and adjusts the wire feeding and winding operations according to the set speed and tension parameters to complete the optical fiber delivery and effective data acquisition. The tensile strength equipment includes a tension tester, a fixing clamp, and a control unit. The tension tester has a built-in force sensor to accurately measure the tension value during the optical fiber stretching process and generate tension data. The fixing clamp adopts an anti-slip design to firmly clamp the optical fiber without damaging it. The control unit is connected to the computer integrated system, receives test parameter commands, and feeds back the tension data to the computer integrated system for inclusion in the effective data range.

[0015] The beneficial effects of this invention are: (1) By logically verifying the multi-dimensional test parameters and planning the test process in sequence, the problem of test interruption caused by parameter coordination conflict and disordered test process was solved, the orderliness and effectiveness of the test process were improved, and all tests were carried out in a continuous manner. (2) By removing abnormal data in real time, verifying the integrity of data transmission, and verifying the consistency between evaluation conclusions and valid data, the problems of data distortion and unreliable evaluation conclusions are solved, the accuracy of test data and the reliability of comprehensive evaluation results are improved, and the actual performance of optical fiber is truly reflected. (3) By modularly arranging the test device and establishing a data association traceability system, the problems of poor device adaptability and untraceable test process were solved, the stability and scalability of the test system were improved, and the entire test process was made traceable, providing support for subsequent test optimization. Attached Figure Description

[0016] Figure 1 A flowchart illustrating the steps of a multi-functional performance testing method for optical fibers; Figure 2 A structural diagram of a multifunctional optical fiber performance testing device provided for an embodiment; Figure 3 The following is a flowchart illustrating the steps of a specific embodiment of a multifunctional performance testing method for optical fibers, provided as an example. Detailed Implementation

[0017] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1 See Figure 1 This paper provides a method for testing the multifunctional performance of optical fibers, which includes the following steps: S1. Set the optical pulse parameters for differential mode delay test, the tension or strain parameters for fiber screening test, the number of tensile strength tests and the tensile speed parameters, perform logical verification on these parameters to confirm that they comply with the fiber performance test technical specifications, and issue an adjustment prompt if there is any abnormality until the verification is passed; S2. Based on the verified test parameters, check the connection status of each device in the test system and the operational stability of the optical signal receiving component and tension detection component. At the same time, clean the fiber ends to remove impurities and damage, and ensure that the fiber meets the test connection requirements. S3. Conduct various performance tests in the preset order of differential mode delay test, fiber warping test, fiber screening test and tensile strength test. Use stable equipment to collect the performance data of each test in real time. During the collection process, remove abnormal data that obviously exceeds the reasonable range and mark the collection timestamp for valid data. S4. Store, summarize and analyze the valid data marked with timestamps. Use a preset comprehensive evaluation algorithm to integrate multi-dimensional data to generate comprehensive performance evaluation results for optical fibers. Verify the consistency between the evaluation conclusions and the valid data. If there are contradictions, re-analyze until the conclusions are consistent, and then output the evaluation results.

[0019] The specific process of differential mode delay testing is as follows: a narrow pulse optical signal is generated according to the set optical pulse parameters and injected into the optical fiber; different modes of optical signals transmitted by the optical fiber are received and converted into electrical signals; waveform analysis is performed on the electrical signals to extract waveform feature points of different modes of optical signals; the arrival time difference of different modes of optical signals is measured according to the waveform feature points, and differential mode delay data is calculated and obtained. This data is included as valid data in subsequent summary analysis.

[0020] The specific process of fiber optic warping test is as follows: a laser beam of specific wavelength and intensity is used to irradiate the fiber optic test area, and the distribution and intensity parameters of scattered light caused by fiber warping are detected in real time; the collected scattered light parameters are noise-reduced, and the degree of fiber warping is calculated through a preset algorithm model. The generated warping data is used as valid data for subsequent comprehensive evaluation.

[0021] The specific process of fiber screening test is as follows: apply a stable force to the fiber according to the set tension or strain parameters, and synchronously control the fiber transmission speed to match the rhythm of the force; detect surface defects of the fiber under stress, including: record the location, size and type, diameter uniformity, and diameter and refractive index changes under different tension conditions; summarize these test data to generate screening data, which is used as valid data in subsequent analysis.

[0022] The specific process of tensile strength testing is as follows: S31: Perform a uniform and stable stretching operation on the optical fiber at the set stretching speed, collect tension data in real time during the stretching process and record the tension change curve, and use the tension data as a valid data marker timestamp. S32: After a single tensile test is completed, pause the fiber optic delivery and screening operation, and reset the tensile state to prepare for the next test. S33: Repeat the stretching operation until the set number of tests is completed; S34: Summarize the tension data from all tensile tests, extract the maximum tension value and breaking tension value for each tensile test (if they exist), and add the summarized results to the valid dataset.

[0023] The performance tests also include data transmission verification and device coordination steps. S35: When each test device transmits the collected valid data to the data processing unit, it verifies the integrity and accuracy of the data according to the preset verification rules. If data loss or error is found, the device is triggered to re-collect and transmit valid data. S36: When switching between different test items, send a coordination command to the relevant equipment to ensure that the next test equipment can start testing after the previous test equipment has paused effective data acquisition, so as to avoid data cross-interference. S37: Monitor the data processing unit's reception and storage status of valid data in real time. If there is insufficient storage capacity or reception delay, issue an early warning and suspend the test. The valid data acquisition and testing process will resume after the fault is resolved.

[0024] After generating the comprehensive performance evaluation results, the process also includes test data tracing and anomaly review steps: S41: Establish a traceability system that links each valid data item with the corresponding test parameters, equipment operating status, and environmental conditions, and support reverse querying of original valid data and test process records through evaluation results; S42: For the data items marked "to be confirmed" in the evaluation results, retrieve the equipment operation logs of the corresponding test phase, and review whether there are any operational deviations or equipment abnormalities that caused data problems during the test process; S43: Generate an anomaly data processing report based on the review results, identify the cause of the anomaly and improvement measures, and update it synchronously to the fiber optic performance evaluation database to provide a reference for parameter setting, equipment inspection and data acquisition in subsequent tests.

[0025] See Figure 2 A multifunctional optical fiber performance testing device is provided, which includes an optical fiber screening device, an automatic optical fiber winding device, a tensile strength device, an optical fiber warping device, a high-speed photodetector, an oscilloscope, and a computer integrated system. The fiber optic screening device, automatic fiber winding device, tensile strength device, fiber warping device, and high-speed photodetector are arranged sequentially along the fiber optic transmission path to achieve sequential, interference-free testing of the fiber optics. The fiber optic screening device, automatic fiber winding device, tensile strength device, fiber warping device, high-speed photodetector, and oscilloscope are all connected to the computer integrated system via data transmission lines, enabling bidirectional transmission of control commands and real-time feedback of test data. A dedicated data connection channel is provided between the oscilloscope and the high-speed photodetector to receive the electrical signal converted by the high-speed photodetector.

[0026] The fiber optic screening equipment includes a high-precision optical sensor and a size measuring device, both of which communicate with a computer integrated system; The high-precision optical sensor is used to detect surface defects in the optical fiber, and the size measuring device is used to detect the uniformity of the optical fiber diameter and the diameter and refractive index changes under different tension conditions. The detection data is transmitted to the computer integrated system in real time as an effective data acquisition source.

[0027] The automatic fiber optic winding device includes a motor-driven winding shaft, a tension adjustment mechanism, and a fiber optic guiding device. The motor-driven winding shaft is used to wind and release the optical fiber. The tension adjustment mechanism is used to adjust the tension on the optical fiber in real time. The optical fiber guiding device is used to prevent bending or tangling of the optical fiber during winding. The automatic optical fiber winding device receives control commands from the computer integrated system and adjusts the wire feeding and winding operations according to the set speed and tension parameters to complete the optical fiber delivery and effective data acquisition. The tensile strength equipment includes a tension tester, a fixing clamp, and a control unit. The tension tester has a built-in force sensor to accurately measure the tension value during the optical fiber stretching process and generate tension data. The fixing clamp adopts an anti-slip design to firmly clamp the optical fiber without damaging it. The control unit is connected to the computer integrated system, receives test parameter commands, and feeds back the tension data to the computer integrated system for inclusion in the effective data range.

[0028] Example 2 See Figure 3 This embodiment provides an implementation process for a multi-functional performance testing method for optical fibers, and the specific steps are as follows: S1. Test parameter setting and verification: S1.1. The first category is the optical pulse parameters for differential mode delay testing, covering the optical pulse width, frequency, and peak power. The parameters must match the optical fiber transmission characteristics to ensure that the optical signal can reflect the differences in transmission modes. The second category is the tension or strain parameters for optical fiber screening testing, including the tension magnitude, duration, and strain type (such as constant stress or constant axial strain). These parameters must be consistent with the stress scenarios in actual optical fiber applications. The third category is the parameters for tensile strength testing, including the number of tests and the stretching speed. The number of tests must meet the statistical validity requirements to reduce random errors, and the stretching speed must be adapted to the mechanical response characteristics of the optical fiber material.

[0029] S1.2. Enter the set parameters into the parameter verification module of the test system. The module performs verification from three dimensions according to the fiber optic performance test technical specifications: rationality verification, comparing the parameter values ​​with the equipment's rated range and industry standards; coordination verification, analyzing the logical relationship between different parameters to avoid conflicts (e.g., the maximum tension of the fiber screening test does not exceed the initial tension of the tensile strength test); and executability verification, sending parameter preloading instructions to each device to verify whether the hardware can respond accurately and eliminating unexecutable parameters.

[0030] S1.3. If an anomaly is detected during verification, the system will provide a pop-up notification and an audible warning, clearly stating the name and type of the abnormal parameter (e.g., "optical pulse frequency is incompatible with detector," "tension parameter exceeds equipment rated range") and the suggested adjustment range. After adjustment, the tester resubmits the verification. The system automatically compares the parameter with the historical qualified parameter database to shorten the verification time. Upon successful verification, the system generates and encrypts the final parameter scheme, synchronously outputs a verification report, and records the verification process, anomaly adjustments, and the final parameter list.

[0031] In some embodiments, parameter settings can adopt an automatic matching mode. The system's built-in parameter database is regularly updated with the latest industry standards and adaptation parameters for different types of optical fibers. Testers only need to input basic information such as fiber type (e.g., single-mode fiber, multimode fiber) and core diameter specifications, and the system can automatically recommend parameter combinations. It also supports the storage of custom parameter templates, allowing for the saving of exclusive solutions for special-purpose optical fibers (e.g., high-temperature resistant fiber), which can be directly called up in subsequent tests, greatly reducing operational complexity.

[0032] S2. Test System Preparation and Fiber Pretreatment: S2.1. Employ highly shielded data transmission lines, connecting the fiber optic screening equipment, automatic fiber winding device, tensile strength tester, fiber warping device, high-speed photodetector, oscilloscope, and computer integrated system one by one, ensuring all interfaces are securely inserted and locked to prevent loosening during testing. Pay particular attention to verifying the dedicated data channel between the oscilloscope and the high-speed photodetector, verifying the channel is interference-free and transmission delay meets requirements by sending test electrical signals, ensuring distortion-free electrical signal transmission.

[0033] S2.2. Start the equipment self-test program and test the modules in the order of "power module → signal processing module → execution module": power module checks the stability of the output voltage and current of each device; signal processing module focuses on testing the sensitivity and response speed of optical signal receiving components (such as high-speed photodetectors) and the measurement accuracy of tension detection components (such as force sensors), and verifies the accuracy of data through standard load calibration; execution module checks the output stability of the laser generator, the signal acquisition sensitivity of the scattered light detection sensor, and the calculation response speed of the data processing unit to ensure that all core components have no fault alarms and that parameters are stable.

[0034] S2.3. Using a dust-free wiping cloth dampened with a special cleaning agent, wipe the fiber optic cable unidirectionally from the end to the center to remove surface dust, oil, and other impurities, preventing these impurities from affecting optical signal injection and transmission. Cut the fiber end face using a high-precision fiber optic cleaver. After cutting, observe the flatness of the end face under a microscope to ensure there are no cracks, gaps, or burrs. If the end face does not meet the standards, it must be recut until it meets the accuracy requirements of the test connection, reducing test errors caused by end defects.

[0035] S2.4. Initially connect the pre-processed optical fiber to the test system. Send a low-power test optical signal through the computer integrated system to verify whether the optical signal can be transmitted normally and whether each device can accurately receive and feedback the signal. Reconfirm that the operating parameters of the core components are not drifting and that the optical fiber clamping parts are not loose. At the same time, use a thermometer and hygrometer to measure the test environment parameters to ensure that the temperature and humidity are stable within the allowable range. After all checks are passed, the system automatically generates a "Test System Readiness Report" to record the equipment status, environmental parameters, and inspection results. At this time, the formal test can be started.

[0036] In some embodiments, an intelligent monitoring module may be introduced to assist in system preparation. This module collects real-time device connection status data (such as interface voltage and line impedance) and core component operating parameters (such as detector sensitivity and sensor accuracy) through built-in sensors, and displays them in the form of a dashboard on a visual interface. When a connection abnormality or component parameter drift is detected, it automatically issues an early warning and locates the problem, while providing troubleshooting suggestions (such as "High-speed optical detector connection abnormal, it is recommended to check the data cable interface"), thereby improving preparation efficiency and reliability.

[0037] S3. Multi-dimensional performance testing and data collection: S3.1. Basic Test Procedures and Data Processing: The tests should be started in the following order: Differential Mode Delay Test → Fiber Warpage Test → Fiber Screening Test → Tensile Strength Test. The Differential Mode Delay Test is performed first because it only detects low-power optical signals and does not cause physical damage to the fiber. The Fiber Warpage Test and Screening Test require the application of force, but are within the elastic deformation range of the fiber, and are performed in sequence. The Tensile Strength Test may cause the fiber to break, so it is performed last to avoid affecting subsequent tests due to fiber damage and to ensure that the test results are uninterrupted.

[0038] S3.2. Before each test, confirm that the equipment status is "ready" before starting the data acquisition program: set the acquisition frequency according to the test response speed to ensure complete capture of data change patterns; automatically mark the raw data with millisecond-level acquisition timestamps, and at the same time collect temperature and humidity data in real time through environmental sensors, associate and store the environmental parameters with the test data of the corresponding timestamps to form a "timestamp-test data-environmental parameter" associated dataset, which provides a reference for subsequent anomaly analysis.

[0039] S3.3. An anomaly detection mechanism is activated synchronously during the data acquisition process. The system calls upon a reasonable threshold library constructed from historical test data. If real-time data significantly exceeds the threshold (e.g., a sudden increase in tension data or a sudden decrease in scattered light intensity), it is immediately marked as "abnormal" and automatically removed from the valid dataset. Simultaneously, the acquisition time of the abnormal data, the corresponding test conditions (e.g., current tension value, light pulse parameters), and changes in environmental parameters are recorded to form an abnormal data log, providing complete information for subsequent review.

[0040] S3.4. According to the set optical pulse parameters, the optical pulse generator generates a narrow pulse optical signal. The alignment angle between the output port and the optical fiber input end is adjusted to ensure that the optical signal is injected vertically into the optical fiber to reduce reflection loss. The high-speed photodetector at the other end of the optical fiber receives optical signals of different modes, converts them into electrical signals, and transmits them to the oscilloscope. The oscilloscope analyzes the waveform of the electrical signal at a high sampling rate, extracts feature points such as peak points and rising edge inflection points, measures the arrival time difference of optical signals of different modes, substitutes them into the preset model (differential mode delay = arrival time difference of optical signals of different modes) to calculate the data, and retains it as valid data.

[0041] In some embodiments, multiple sets of optical pulse parameters can be tested in parallel. Multiple sets of optical pulse parameters with different widths and frequencies are set, and each set of parameters is tested and data is collected separately. After the test, the deviation ranges of the multiple sets of data are compared. If the deviation is within the industry allowable error range, the data is confirmed to be valid; otherwise, the test is repeated. Cross-validation improves the reliability of the results.

[0042] S3.5. Activate the fiber warping device. The laser generator sets the wavelength and output intensity according to the fiber transmission window. The installation angle is calibrated by the laser positioning instrument to ensure that the laser beam uniformly covers the fiber test area without any blind spots. The surround-type scattered light detection sensor collects the distribution range and intensity parameters of scattered light caused by fiber warping in real time. During the collection process, the ambient light filtering function is activated to remove stray light interference. The collected scattered light parameters are denoised using a mean filtering algorithm. After obtaining a clean dataset, it is input into the preset algorithm model to calculate the degree of fiber warping and generate valid data for subsequent comprehensive evaluation.

[0043] S3.6. According to the set tension or strain parameters, the servo motor drives the tension mechanism to apply a stable force to the optical fiber. At the same time, the closed-loop feedback adjustment mechanism is activated to monitor the tension value in real time and adjust the motor output power to ensure that the force is stable. The automatic optical fiber winding device is activated simultaneously, and the winding speed is adjusted according to the tension application rhythm to control the optical fiber delivery speed to match the force rhythm. The high-precision optical sensor captures surface defects of the optical fiber, distinguishes the defect type (such as scratches and dents), and records the location and size. The size measurement device measures the diameter uniformity based on the laser interference principle, and monitors the diameter change and refractive index change under different tensions. All detection data are summarized to generate screening data, which is used as valid data for analysis.

[0044] S3.7. Tensile strength test procedure: S3.7.1. Lead the optical fiber out from the automatic winding device and fix it on the multi-jaw fixing fixture. The clamping surface of the fixture is made of flexible wear-resistant material to ensure that the optical fiber is firmly clamped and not damaged. According to the set tensioning speed, the linear motor drives the tension tester to stretch the optical fiber at a uniform speed. The built-in force sensor collects tension data in real time, records the tension change curve over time, and marks each data point with a millisecond-level timestamp.

[0045] S3.7.2. After a single stretching operation is completed, the system pauses the fiber delivery and screening operation, the clamps automatically release, and the stretching mechanism returns to its initial state. If the fiber breaks during the stretching process (judged by a sudden drop in tension value exceeding the threshold), the tension value, stretching length, and breakage location at the time of breakage are recorded, and a decision is made on whether to replace the fiber segment with a spare based on the set number of tests.

[0046] S3.7.3. Repeat the stretching and resetting steps a set number of times. Before each test, adjust the fiber clamping position using the positioning sensor to ensure consistent effective stretching length. Use servo motor speed closed-loop control to ensure stable stretching speed. After all tests are completed, summarize the tension data, extract the maximum tension value for each stretch, and if there is a breakage, extract the breakage tension value simultaneously and add it to the effective dataset.

[0047] S3.8. Data transmission verification and device coordination: S3.8.1. Each test device transmits valid data to the central data processing unit. Before transmission, the system adds a check code to each batch of data. After receiving the data, the processing unit verifies it according to preset rules: verifying the integrity of the data through the check code, comparing whether the data length is consistent with the preset format, and checking whether the values ​​of key parameters are within a reasonable range. If the verification fails, the system immediately sends a "re-acquisition" command to the corresponding device until the data passes all verifications.

[0048] S3.8.2. After a test is completed, the system sends a pause command to the current device. After the device stops data acquisition, shuts down the execution module, and sends a "ready" signal, the system sends a start command and preset parameters to the next device. After the device is paused, the system locks the operation permissions to avoid data cross-interference caused by accidental operation and to ensure the orderly connection of the process.

[0049] S3.8.3. Real-time monitoring of the data processing unit's receiving latency (calculated through test data packets) and storage capacity utilization; when the latency exceeds the threshold or storage utilization reaches the warning line, the system issues a pop-up warning and sound prompt, and simultaneously suspends the test; after the test personnel troubleshoot the fault (such as clearing redundant data and checking line connections), the data acquisition and testing process is resumed.

[0050] In some embodiments, a distributed data acquisition and verification mode can be adopted. Each test device is equipped with a local data processing module, which first performs preliminary verification (such as correcting sensor zero-point drift) and preprocessing (such as format conversion and simple filtering) on ​​the acquired data, and then transmits the processed data packets to the central unit; the central unit performs secondary verification (such as cross-device data consistency verification) and aggregation, reducing the processing pressure on the central unit and reducing transmission delay and errors.

[0051] S4. Data processing, comprehensive evaluation, and retrospective review: S4.1. Data Storage and Analysis: Valid data is classified according to test type (differential mode delay, warpage, screening, tensile strength) to establish a structured database. Data tables include fields such as "test batch number, fiber number, test parameters, acquisition timestamp, raw data, environmental parameters, and equipment status code". When storing data, the corresponding test parameters, equipment operating status, and environmental parameters are automatically associated to form a complete data archive. Common formats such as CSV and JSON are used for storage, and backup files are generated to ensure that the data can be opened and processed on different platforms.

[0052] S4.2. Extract core data from the database and integrate it according to rules: Differential mode delay data is grouped and summarized according to optical pulse parameters, and the average time difference under each group of parameters is calculated; warpage data is correlated with environmental parameters and fiber position parameters; filtered data is classified according to defect type and tension conditions, and the frequency of defect occurrence and diameter variation range are calculated; tensile strength data is sorted by the number of tests and maximum tension value. After integration, a comprehensive dataset is formed, and built-in algorithms are called for analysis: differential mode delay statistics (mean, standard deviation) are calculated to determine transmission stability, warpage data is linearly regressed to identify change patterns, filtered data is clustered to determine defect concentration areas, and tensile strength data is analyzed for reliability to evaluate mechanical consistency.

[0053] S4.3. Comprehensive performance evaluation generation: S4.3.1. Automatically adjust the evaluation weights according to the optical fiber application scenario (such as communication transmission and engineering construction). Communication optical fibers focus on differential mode delay, while engineering optical fibers focus on tensile strength. Start the comprehensive evaluation algorithm and combine the analysis results of each dimension: determine the transmission mode characteristics and efficiency, determine the tensile strength level, evaluate physical integrity (impact of defects) and dimensional stability (diameter / refractive index fluctuation), and generate a preliminary evaluation conclusion through weighted summation and logical judgment.

[0054] S4.3.2. Compare the preliminary conclusions with the individual test results one by one. If there are contradictions (such as the overall evaluation being excellent but the tensile strength not meeting the standard), return to the data aggregation stage to check the accuracy of the integration, and return to the analysis stage to check the applicability of the algorithm. If necessary, start the supplementary collection of key indicators and repeat the process until the conclusion is consistent with all individual data to form the final evaluation result.

[0055] S4.3.3. Generate evaluation documents according to the preset template. The content includes basic fiber information, various performance indicators (compliance / level), comprehensive rating, key data charts (tension curve, scattered light distribution map), and improvement suggestions. The output format can be a standardized report (PDF, Excel) or a visualization interface (bar chart, line chart), and the level of detail can be selected (simplified version / full version).

[0056] S4.4. Data Traceability and Anomaly Review: S4.4.1. An immutable traceability system is constructed using blockchain technology. The comprehensive evaluation results serve as the top-level index, linking valid data, raw data, test parameters, equipment operation records, environmental parameters, and timestamps for each test. The system adopts a hierarchical design, allowing users to query individual data, raw data, and test process records layer by layer from the evaluation results, forming a clear traceability chain.

[0057] S4.4.2. The system automatically scans the "pending confirmation" data items in the evaluation results and generates an anomaly list; testers retrieve the equipment operation logs, data acquisition records, and environmental change curves of the corresponding test stages to check whether there is parameter drift, transmission interference, sudden environmental changes, or whether the operation is standardized, and comprehensively locate the cause of the anomaly.

[0058] S4.4.3. Generate an anomaly handling report based on the review results, specifying the anomaly type, cause, impact, and improvement measures (such as replacing faulty components or optimizing environmental control); after review, the report is updated to the fiber optic performance evaluation database, and the database regularly summarizes anomaly cases to form a knowledge base, providing a reference for parameter setting and equipment inspection in subsequent tests.

[0059] In some embodiments, artificial intelligence algorithms can be introduced to assist in the assessment. Historical test data, evaluation results, and anomaly cases are used to train an intelligent evaluation model to improve evaluation accuracy; simultaneously, an anomaly review model is trained to match historical cases based on anomaly data characteristics, recommend possible causes and improvement measures, and assist in efficient review. The model is periodically iterated and optimized based on new data.

[0060] S5. Test Equipment Adaptation and Operation Support: S5.1: Device Structure and Connection: The fiber optic screening equipment, automatic fiber optic winding device, tensile strength device, fiber optic warping device, and high-speed photodetector are arranged sequentially along the fiber optic transmission path, with reasonable transmission space reserved between adjacent devices to meet the fiber optic bending radius requirements; each device (including the oscilloscope) is connected to the computer integrated system via a highly shielded data cable to achieve bidirectional transmission of control commands and real-time feedback of test data; an independent dedicated data channel is provided between the oscilloscope and the high-speed photodetector, using a low-loss transmission medium and an anti-interference shielding layer to ensure distortion-free and delay-free transmission of electrical signals; all lines are fixed with cable trays to avoid tangling or damage from pressure.

[0061] S5.2. Core Equipment Functions: S5.2.1. The high-precision optical sensor of the fiber optic screening equipment is equipped with a high-definition lens to capture defects and distinguish their types. The size measurement device measures the diameter and changes under tension based on the principle of laser interference, and the data is uploaded in real time. The stepper motor of the automatic fiber winding device adjusts the speed to realize fiber winding / unwinding. The tension adjustment mechanism dynamically maintains the tension stability. The guide wheel guides the fiber to be transported along the preset path to avoid bending and tangling.

[0062] S5.2.2. The force sensor of the tensile strength device is installed near the clamp end to accurately measure the tension value. The multi-claw clamp flexibly holds the optical fiber. The control unit receives commands, drives the test, and feeds back data. The laser generator of the optical fiber warping device adjusts the power and wavelength. The scattered light sensor collects parameters from all directions. The data processing unit calculates the degree of warping after noise reduction.

[0063] S5.2.3. The high-speed photodetector uses an avalanche photodiode to receive weak light signals and convert them into electrical signals while maintaining signal characteristics; the oscilloscope analyzes the waveform at a high sampling rate, accurately measures the time difference of the light signal, and transmits the results to the computer integrated system.

[0064] S5.3. Equipment Operation Support: Regularly calibrate core components: Monthly routine calibration (using standard instruments to calibrate force sensors and optical power meters), and quarterly comprehensive calibration (contracted to a third-party organization) to ensure performance meets standards; Regularly check data lines: Weekly check interfaces and insulation layers, and replace aging or damaged lines; Real-time monitor equipment status: Install temperature and vibration sensors on core components, and automatically issue warnings when parameters exceed the range; Develop a maintenance plan: Clean equipment dust daily, check component status weekly, replace easily worn parts (clamp rubber pads, guide wheels) monthly, and perform disassembly and maintenance every six months to extend equipment life.

[0065] This solution achieves efficient and accurate testing of multi-dimensional fiber optic performance through a systematic testing process and dedicated equipment design. The technical benefits include a four-step core process: parameter setting, system preparation, test acquisition, and data processing. This constructs a logically rigorous and seamlessly integrated testing system, ensuring that all tests are conducted sequentially and data is effectively transmitted. This fundamentally improves the orderliness and completeness of the testing process, avoiding test omissions or data distortion caused by process chaos. This effect directly stems from the core process design. Furthermore, through multiple quality control mechanisms such as parameter verification, abnormal data removal, and equipment collaborative control, testing errors are effectively reduced. It improves data accuracy and assessment reliability, ensuring that test results truly reflect the actual performance of optical fibers; it integrates differential mode delay, warpage, screening, and tensile strength tests, comprehensively covering optical fiber transmission characteristics, physical integrity, and mechanical properties, providing a comprehensive basis for quality assessment and application selection; the data traceability system and anomaly review mechanism enable full traceability of the testing process and closed-loop handling of problems, and the experience accumulated in the database can continuously optimize subsequent tests; the modular design and precise adaptation of the device ensure the effective implementation of testing methods, improve system stability and scalability, and can adapt to the testing needs of different types of optical fibers, ultimately providing strong support for optical fiber quality control.

[0066] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A method for testing the multifunctional performance of optical fibers, characterized in that, Includes the following steps: S1. Set the optical pulse parameters for differential mode delay test, the tension or strain parameters for fiber screening test, the number of tensile strength tests and the tensile speed parameters, perform logical verification on these parameters to confirm that they comply with the fiber performance test technical specifications, and issue an adjustment prompt if there is any abnormality until the verification is passed; S2. Based on the verified test parameters, check the connection status of each device in the test system and the operational stability of the optical signal receiving component and tension detection component. At the same time, clean the fiber ends to remove impurities and damage, and ensure that the fiber meets the test connection requirements. S3. Conduct various performance tests in the preset order of differential mode delay test, fiber warping test, fiber screening test and tensile strength test. Use stable equipment to collect the performance data of each test in real time. During the collection process, remove abnormal data that obviously exceeds the reasonable range and mark the collection timestamp for valid data. S4. Store, summarize and analyze the valid data marked with timestamps. Use a preset comprehensive evaluation algorithm to integrate multi-dimensional data to generate comprehensive performance evaluation results for optical fibers. Verify the consistency between the evaluation conclusions and the valid data. If there are contradictions, re-analyze until the conclusions are consistent, and then output the evaluation results.

2. The method according to claim 1, characterized in that, The specific process of the differential mode delay test is as follows: a narrow pulse optical signal is generated according to the set optical pulse parameters and injected into the optical fiber; different modes of optical signals transmitted through the optical fiber are received and converted into electrical signals. Waveform analysis is performed on electrical signals to extract waveform feature points of optical signals in different modes; The arrival time difference of optical signals in different modes is measured based on waveform feature points, and the differential mode delay data is calculated and obtained. This data is included as valid data in subsequent summary analysis.

3. The method according to claim 1, characterized in that, The specific process of the fiber warping test is as follows: the fiber test area is irradiated with a laser beam of a specific wavelength and intensity, and the distribution and intensity parameters of scattered light caused by fiber warping are detected in real time; the collected scattered light parameters are noise-reduced, and the degree of fiber warping is calculated by a preset algorithm model. The generated warping data is used as valid data for subsequent comprehensive evaluation.

4. The method according to claim 1, characterized in that, The specific process of the optical fiber screening test is as follows: apply a stable force to the optical fiber according to the set tension or strain parameters, and synchronously control the optical fiber transmission speed to match the rhythm of the force; detect surface defects of the optical fiber under stress, including: record the location, size and type, diameter uniformity, and diameter and refractive index changes under different tension conditions; summarize these test data to generate screening data, which is used as valid data in subsequent analysis.

5. The method according to claim 1, characterized in that, The specific process of the tensile strength test is as follows: S31: Perform a uniform and stable stretching operation on the optical fiber at the set stretching speed, collect tension data in real time during the stretching process and record the tension change curve, and use the tension data as a valid data marker timestamp. S32: After a single tensile test is completed, pause the fiber optic delivery and screening operation, and reset the tensile state to prepare for the next test. S33: Repeat the stretching operation until the set number of tests is completed; S34: Summarize the tension data from all tensile tests, extract the maximum tension value and breaking tension value for each tensile test, and add the results to the valid dataset.

6. The method according to claim 1, characterized in that, The performance tests also include data transmission verification and device coordination steps. S35: When each test device transmits the collected valid data to the data processing unit, it verifies the integrity and accuracy of the data according to the preset verification rules. If data loss or error is found, the device is triggered to re-collect and transmit valid data. S36: When switching between different test items, send a coordination command to the relevant equipment to ensure that the next test equipment can start testing after the previous test equipment has paused effective data acquisition, so as to avoid data cross-interference. S37: Monitor the data processing unit's reception and storage status of valid data in real time. If there is insufficient storage capacity or reception delay, issue an early warning and suspend the test. The valid data acquisition and testing process will resume after the fault is resolved.

7. The method according to claim 1, characterized in that, After generating the comprehensive performance evaluation results, the process also includes test data tracing and anomaly review steps: S41: Establish a traceability system that links each valid data item with the corresponding test parameters, equipment operating status, and environmental conditions, and support reverse querying of original valid data and test process records through evaluation results; S42: For the data items marked "to be confirmed" in the evaluation results, retrieve the equipment operation logs of the corresponding test phase, and review whether there are any operational deviations or equipment abnormalities that caused data problems during the test process; S43: Generate an anomaly data processing report based on the review results, identify the cause of the anomaly and improvement measures, and update it synchronously to the fiber optic performance evaluation database to provide a reference for parameter setting, equipment inspection and data acquisition in subsequent tests.

8. A multifunctional optical fiber performance testing device for implementing the testing method according to any one of claims 1-7, characterized in that, This includes fiber optic screening equipment, automatic fiber optic winding devices, tensile strength testing equipment, fiber optic warping devices, high-speed optical detectors, oscilloscopes, and computer integrated systems. The fiber optic screening device, automatic fiber winding device, tensile strength device, fiber warping device, and high-speed photodetector are arranged sequentially along the fiber optic transmission path to achieve sequential, interference-free testing of the fiber optics. The fiber optic screening device, automatic fiber winding device, tensile strength device, fiber warping device, high-speed photodetector, and oscilloscope are all connected to the computer integrated system via data transmission lines, enabling bidirectional transmission of control commands and real-time feedback of test data. A dedicated data connection channel is provided between the oscilloscope and the high-speed photodetector to receive the electrical signal converted by the high-speed photodetector.

9. The fiber optic multifunctional performance testing device according to claim 8, characterized in that, The fiber optic screening device includes an optical sensor and a size measuring device, both of which communicate with a computer integrated system. The optical sensor is used to detect surface defects of the optical fiber, and the size measuring device is used to detect the uniformity of the optical fiber diameter and the diameter and refractive index changes under different tension conditions, and transmits the detection data to the computer integrated system in real time as a source of effective data acquisition.

10. The fiber optic multifunctional performance testing device according to claim 8, characterized in that, The automatic fiber optic winding device includes a motor-driven winding shaft, a tension adjustment mechanism, and a fiber optic guiding device. The motor-driven winding shaft is used to wind and release the optical fiber. The tension adjustment mechanism is used to adjust the tension on the optical fiber in real time. The optical fiber guiding device is used to prevent bending or tangling of the optical fiber during winding. The automatic optical fiber winding device receives control commands from the computer integrated system and adjusts the wire feeding and winding operations according to the set speed and tension parameters to complete the optical fiber delivery and effective data acquisition. The tensile strength equipment includes a tension tester, a fixing clamp, and a control unit. The tension tester has a built-in force sensor to accurately measure the tension value during the optical fiber stretching process and generate tension data. The fixing clamp adopts an anti-slip design to firmly clamp the optical fiber without damaging it. The control unit is connected to the computer integrated system, receives test parameter commands, and feeds back the tension data to the computer integrated system for inclusion in the effective data range.

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