Optical fiber signal testing system

Abstract

The present invention belongs to the technical field of signal testing, and specifically is an optical fiber signal testing system, comprising a processor, a test pre-preparation analysis module, a test equipment calibration analysis module, an optical fiber signal detection and comparison module, and a test display and warning terminal; the present invention performs pre-preparation analysis on a light source and an optical receiver, and calibrates and analyzes the test equipment one by one when generating a preliminary preparation qualified signal, so as to determine whether a timely calibration signal of the corresponding test equipment is generated, which is conducive to ensuring the accuracy of the test result and the smooth progress of the test process, and when performing an optical fiber signal test, an optical fiber signal qualified signal, a test unqualified high-level warning signal or a test unqualified low-level warning signal of the corresponding optical fiber is generated through analysis, and auxiliary analysis is performed when generating an optical fiber signal test qualified signal or a test unqualified low-level warning signal, so as to achieve a comprehensive and effective analysis of the optical fiber signal test to further improve the accuracy of the test result.

Description

Technical Field

[0001] The invention relates to the technical field of signal testing, in particular to an optical fiber signal testing system. Background Art

[0002] Optical fiber is an abbreviation of optical fiber, which is a fiber made of glass or plastic and can be used as a light transmission tool. The principle of optical fiber transmission is total reflection of light, and optical fiber signal refers to the signal emitted by light. The transmission principle of optical fiber signal is to first convert the transmitted information into an electrical signal at the sending end, and then modulate it to the laser beam emitted by the laser, so that the intensity of the light changes with the amplitude of the electrical signal, and then send it out through the optical fiber. After the detector receives the optical signal at the receiving end, it is converted into an electrical signal, and the original information is restored after demodulation;

[0003] At present, when conducting optical fiber signal testing, it is necessary to use several corresponding test equipment, but it is not possible to combine the pre-preparation analysis with the calibration and judgment analysis of several equipment before the test, which is not conducive to the test personnel to adjust the equipment in time to ensure the accuracy of the test results and the smoothness of the test process. It is also difficult to achieve a comprehensive and effective analysis of the optical fiber signal test to improve the accuracy of the test results, which needs to be improved;

[0004] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a fiber optic signal testing system, which solves the problem that the prior art cannot combine pre-preparation analysis with calibration judgment analysis of several devices before testing, which is not conducive to testers to adjust the equipment in time, and it is difficult to achieve comprehensive and effective analysis of fiber optic signal testing, and the test results have low accuracy.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A fiber optic signal test system comprises a processor, a test pre-preparation analysis module, a test equipment calibration analysis module, a fiber optic signal detection and comparison module, and a test display and early warning terminal; the test pre-preparation analysis module performs pre-preparation analysis on a light source and an optical receiver used for fiber optic signal testing, assigns a judgment symbol GY-1 or GY-2 to the light source and a judgment symbol GJ-1 or GJ-2 to the optical receiver through the pre-preparation analysis, and generates a preliminary preparation qualified signal or a preliminary preparation unqualified signal accordingly, sends the preliminary preparation qualified signal to the test equipment calibration analysis module via the processor, and sends the preliminary preparation unqualified signal to the test display and early warning terminal via the processor, and the test display and early warning terminal issues a corresponding warning after receiving the preliminary preparation unqualified signal;

[0008] The test equipment calibration and analysis module will perform calibration and analysis on all the test equipment used for the fiber optic signal test one by one, and determine whether to generate a timely calibration signal for the corresponding test equipment through calibration analysis. If all the test equipment do not need to be calibrated, a qualified accuracy signal will be generated, and the qualified accuracy signal, the timely calibration signal and the corresponding test equipment will be sent to the test display and early warning terminal via the processor. After receiving the qualified accuracy signal, the fiber optic signal test will be started, and the corresponding test equipment will be checked and calibrated when the timely calibration signal is received. When performing the fiber optic signal test, the fiber optic signal detection and comparison module will generate a qualified fiber optic signal, a high-level warning signal for unqualified test or a low-level warning signal for unqualified test of the corresponding optical fiber through analysis. When the high-level warning signal for unqualified test or the low-level warning signal for unqualified test is generated, it will be sent to the test display and early warning terminal via the processor to issue a corresponding warning.

[0009] Furthermore, the specific analysis process of the pre-test preparation analysis module is as follows:

[0010] Obtain a light source and an optical receiver for optical fiber signal testing, collect the wavelength and power of the corresponding light source, compare the wavelength and power of the corresponding light source with the preset wavelength range and the preset power range respectively, if the wavelength and power of the corresponding light source are both within the corresponding preset range, then the light source is judged to be qualified and assigned a light source determination symbol GY-1; if the wavelength of the corresponding light source is not within the preset wavelength range or the power is not within the preset power range, then the light source is judged to be unqualified and assigned a light source determination symbol GY-2;

[0011] The sensitivity and bandwidth of the corresponding optical receiver are collected, and the sensitivity and bandwidth of the corresponding optical receiver are numerically compared with the preset sensitivity range and the preset bandwidth range respectively; if the sensitivity and bandwidth of the corresponding optical receiver are both within the corresponding preset range, the optical receiver is judged to be qualified and the optical receiver is assigned a judgment symbol GJ-1; if the sensitivity of the corresponding optical receiver is not within the preset sensitivity range or the bandwidth is not within the preset bandwidth range, the optical receiver is judged to be unqualified and the optical receiver is assigned a judgment symbol GJ-2; the light source judgment symbol and the optical receiver judgment symbol are subjected to intersection analysis; if the intersection result is GY-1∩GJ-1, a preliminary qualified signal is generated; in other cases, a preliminary unqualified signal is generated, and the preliminary qualified signal is sent to the calibration analysis module of the test equipment via the processor.

[0012] Furthermore, the specific analysis process of the test equipment calibration analysis module includes:

[0013] Acquire all the test equipment used for optical fiber signal testing, mark the corresponding test equipment as target equipment i, i={1,2,…,n}, n represents the number of test equipment and n is a natural number greater than 1; collect each calibration moment of the corresponding target equipment i, calculate the time difference between two adjacent groups of calibration moments to obtain the calibration time difference, sum and calculate all the calibration time differences and take the average to obtain the time reference value, calculate the time difference between the current moment and the adjacent last calibration moment to obtain the measured calibration interval time, subtract the calibration reference value from the measured calibration interval time to obtain the calibration evaluation value, and if the calibration evaluation value exceeds the corresponding preset calibration evaluation threshold, generate a timely calibration signal for the corresponding target equipment i;

[0014] If the timing evaluation value does not exceed the corresponding preset timing evaluation threshold, the number of working times and the duration of each working time of the target device i within the measured timing interval, as well as the number of maintenance times and the duration of each maintenance of the target device i within the measured timing interval are collected, and the total working time is calculated by summing up each maintenance time to obtain the total maintenance time, and the preset timing evaluation threshold is subtracted from the timing evaluation value to obtain the timing analysis value;

[0015] The number of working times, total working time, number of maintenance times and total maintenance time of the target device i within the measured calibration interval and the calibration analysis value are normalized to obtain the calibration reanalysis value; the device correction factor β is obtained through analysis, the calibration reanalysis value is multiplied by β and the product of the two is marked as the calibration strategy value; the calibration strategy value is numerically compared with the corresponding preset calibration strategy threshold value. If the calibration strategy value exceeds the preset calibration strategy threshold value, a timely calibration signal is generated for the corresponding target device i. If the calibration strategy value does not exceed the preset calibration strategy threshold value, it is determined that the corresponding target device i does not need to be calibrated. If all test devices do not need to be calibrated, a qualified accuracy signal is generated.

[0016] Furthermore, the specific analysis process of obtaining the equipment correction factor β through analysis is as follows:

[0017] The production date of the target device i is obtained, the time difference between the current date and the production date is calculated to obtain the production interval duration, and the historical working times and each working time of the target device i within the production interval duration are obtained, each working time is summed up to obtain the historical working time value, and the production interval duration, the historical working times and the historical working time values ​​are numerically calculated to obtain the correction influence coefficient; the correction influence coefficient is numerically compared with the preset correction influence coefficient range, if the correction influence coefficient exceeds the maximum value of the preset correction influence coefficient range, the device correction factor β is assigned a value of b1, if the correction influence coefficient is within the preset correction influence coefficient range, the device correction factor β is assigned a value of b2, if the correction influence coefficient does not exceed the minimum value of the preset correction influence coefficient range, the device correction factor β is assigned a value of b3, and b1>b2>b3>0.

[0018] Furthermore, the specific operation process of the optical fiber signal detection and comparison module includes:

[0019] By measuring the optical power values ​​at multiple positions on the optical fiber, the optical power loss value per unit length of the optical fiber is obtained and the attenuation coefficient of the optical fiber is calculated, and the average attenuation value is obtained by calculating the average optical power loss of the optical fiber in the entire length range; and by measuring the dispersion characteristics of the optical fiber at different wavelengths or different speeds, the dispersion shift value of the optical fiber is obtained, and by measuring the dispersion characteristics of the optical fiber in different modes, the inter-modal dispersion value of the optical fiber is obtained; the error calculation is performed between each group of actual values ​​obtained by the test and the corresponding theoretical values, and the attenuation coefficient error value, the average attenuation error value, the dispersion shift error value and the inter-modal dispersion error value are obtained through the error calculation. If the error calculation values ​​of all the test items do not exceed the corresponding error value requirements, a fiber signal test qualified signal is generated;

[0020] If there is an error calculated value that exceeds the corresponding error numerical requirement, the error value of the corresponding detection item will be marked as a high-bias error value, and the deviation value of the high-bias error value compared to the corresponding error numerical requirement will be marked as an error deviation coefficient; the error deviation coefficient will be numerically compared with the error deviation coefficient range of the corresponding detection item. If the error deviation coefficient exceeds the maximum value of the preset error deviation coefficient range, the corresponding detection item will be marked as an over-biased item. If the error deviation coefficient is within the preset error deviation coefficient range, the corresponding detection item will be marked as a medium-biased item. If the error deviation coefficient does not exceed the minimum value of the preset error deviation coefficient range, the corresponding detection item will be marked as a slightly-biased item. If there is an over-biased item in the corresponding optical fiber signal test, a high-level warning signal of test failure is generated. If there is no over-biased item in the corresponding optical fiber signal test, the number of medium-biased items and the number of slightly-biased items are weighted and summed to obtain a test feedback value. The test feedback value is numerically compared with the preset test feedback threshold. If the test feedback value exceeds the preset test feedback threshold, a high-level warning signal of test failure is generated. If the test feedback value does not exceed the preset test feedback threshold, a low-level warning signal of test failure is generated.

[0021] Furthermore, when generating a fiber optic signal test pass signal or a test fail low-level warning signal, the processor sends the fiber optic signal test pass signal or the test fail low-level warning signal to the fiber optic signal auxiliary analysis module, and the fiber optic signal auxiliary analysis module generates an auxiliary analysis pass signal or an auxiliary analysis fail signal through analysis, and sends the auxiliary analysis fail signal to the test display and warning terminal via the processor, and the test display and warning terminal displays the signal and issues a corresponding warning.

[0022] Furthermore, the specific analysis process of the optical fiber signal auxiliary analysis module is as follows:

[0023] Obtain the optical fiber link loss value, eye diagram value, polarization value and bit error rate value in the optical fiber signal test process, and compare the optical fiber link loss value, eye diagram value, polarization value and bit error rate value with the preset optical fiber link loss threshold, preset eye diagram threshold, preset polarization threshold and preset bit error rate threshold respectively; if the optical fiber link loss value and the bit error rate value do not exceed the corresponding preset thresholds and the eye diagram value and the polarization value exceed the corresponding preset thresholds, perform auxiliary strategy analysis, and generate an auxiliary analysis unqualified signal in other cases;

[0024] When performing auxiliary strategy analysis, the optical fiber link loss value, eye diagram value, polarization value and bit error rate value are numerically calculated to obtain the auxiliary analysis value; the auxiliary analysis value is numerically compared with the preset auxiliary analysis threshold value, the values ​​of the preset auxiliary analysis threshold value are a1 and a2, and a1>a2>0, if a qualified signal of the optical fiber signal test is obtained, the value of the preset auxiliary analysis threshold value is a1, if a low-level warning signal of unqualified test is obtained, the value of the preset auxiliary analysis threshold value is a2; if the auxiliary analysis value exceeds the corresponding preset auxiliary analysis threshold value, an auxiliary analysis unqualified signal is generated, and if the auxiliary analysis value does not exceed the corresponding preset auxiliary analysis threshold value, a qualified auxiliary analysis signal is generated.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. In the present invention, the light source and the light receiver are subjected to pre-preparation analysis by the test pre-preparation analysis module, so as to assign the light source a judgment symbol GY-1 or GY-2 and the light receiver a judgment symbol GJ-1 or GJ-2, and accordingly generate a preliminary preparation qualified signal or a preliminary preparation unqualified signal, and when generating the preliminary preparation qualified signal, the test equipment is calibrated and analyzed one by one by the test equipment calibration analysis module, and the calibration analysis is used to determine whether a timely calibration signal of the corresponding test equipment is generated. If all the test equipment do not need to be standardized, a precision qualified signal is generated, which is conducive to the test personnel to adjust the equipment in time to ensure the accuracy of the test results and the smoothness of the test process;

[0027] 2. In the present invention, an optical fiber signal detection and comparison module is used for analysis to generate an optical fiber signal qualification signal, a test failure high-level warning signal, or a test failure low-level warning signal of the corresponding optical fiber, so that the test personnel can grasp the optical fiber signal test results in detail and the test results are more accurate. When generating an optical fiber signal test qualification signal or a test failure low-level warning signal, an optical fiber signal auxiliary analysis module is used for analysis to generate an auxiliary analysis qualification signal or an auxiliary analysis failure signal, thereby achieving a comprehensive and effective analysis of the optical fiber signal test to further improve the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings;

[0029] Figure 1 This is a system block diagram of Embodiment 1 of the present invention;

[0030] Figure 2 This is a system block diagram of Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1: Figure 1 As shown, a fiber optic signal test system proposed by the present invention includes a processor, a test pre-preparation analysis module, a test equipment calibration analysis module, a fiber optic signal detection and comparison module, and a test display and warning terminal, and the processor is in communication connection with the test pre-preparation analysis module, the test equipment calibration analysis module, the fiber optic signal detection and comparison module, and the test display and warning terminal; the test pre-preparation analysis module performs pre-preparation analysis on a light source and an optical receiver used for performing a fiber optic signal test, and assigns a judgment symbol GY-1 or GY-2 to the light source and a judgment symbol GJ-1 or GJ-2 to the optical receiver through the pre-preparation analysis, and generates a preliminary preparation qualified signal or a preliminary preparation unqualified signal accordingly, and sends the preliminary preparation unqualified signal to the test display and warning terminal via the processor, and the test display and warning terminal issues a corresponding warning after receiving the preliminary preparation unqualified signal; the specific analysis process is as follows:

[0033] A light source and a light receiver for optical fiber signal testing are obtained, the wavelength and power of the corresponding light source are collected, and the wavelength and power of the corresponding light source are numerically compared with the preset wavelength range and the preset power range respectively; if the wavelength and power of the corresponding light source are both within the corresponding preset range, the light source is judged to be qualified and assigned a light source judgment symbol GY-1; if the wavelength of the corresponding light source is not within the preset wavelength range or the power is not within the preset power range, the light source is judged to be unqualified and assigned a light source judgment symbol GY-2; it should be noted that the wavelength and power of the light source are very important parameters in the optical fiber communication system. When testing the optical fiber communication system, a light source that meets the test requirements needs to be selected to ensure that the wavelength and power of the optical signal meet the system requirements;

[0034] And collect the sensitivity and bandwidth of the corresponding optical receiver, where sensitivity refers to the lowest optical power that the optical receiver can detect. The higher the sensitivity of the optical receiver, the lower the optical power it can work normally. In the optical fiber communication system, the output optical power of the light source is limited, so the sensitivity of the optical receiver determines the transmission distance of the system and the quality of the signal; bandwidth refers to the power range that the optical receiver can respond to. The larger the bandwidth of the optical receiver, the wider the power range it can work normally;

[0035] Compare the sensitivity and bandwidth of the corresponding optical receiver with the preset sensitivity range and the preset bandwidth range respectively; if the sensitivity and bandwidth of the corresponding optical receiver are both within the corresponding preset range, the optical receiver is judged to be qualified and the optical receiver is assigned a judgment symbol GJ-1; if the sensitivity of the corresponding optical receiver is not within the preset sensitivity range or the bandwidth is not within the preset bandwidth range, the optical receiver is judged to be unqualified and the optical receiver is assigned a judgment symbol GJ-2;

[0036] Perform intersection analysis on the light source judgment symbol and the light receiver judgment symbol. If the intersection result is GY-1∩GJ-1, it indicates that the currently prepared light source and light receiver meet the test requirements, which helps to ensure the smooth progress of the test process and the accuracy of the test results. A preliminary preparation qualified signal is generated. Other situations indicate that it is not conducive to ensuring the smooth progress of the test process and the accuracy of the test results. A preliminary preparation unqualified signal is generated, waiting for the test personnel to replace and adjust the corresponding equipment, which helps to ensure the accuracy of the optical fiber signal test results and enable the optical fiber signal test process to proceed smoothly.

[0037] The test pre-preparation analysis module sends the preliminary preparation qualified signal to the test equipment calibration analysis module through the processor. The test equipment calibration analysis module performs calibration analysis on all test equipment used for optical fiber signal testing one by one, and determines whether to generate a timely calibration signal for the corresponding test equipment through calibration analysis. If all test equipment does not need to be calibrated, a precision qualified signal is generated, and the precision qualified signal, the timely calibration signal and the corresponding test equipment are sent to the test display and early warning terminal through the processor. After receiving the precision qualified signal, the optical fiber signal test is started, and the corresponding test equipment is checked and calibrated when the timely calibration signal is received. The specific analysis process of the test equipment calibration analysis module is as follows:

[0038] Obtain all test equipment (including optical power meters, optical time domain reflectometers, etc.) used for optical fiber signal testing, and mark the corresponding test equipment as target equipment i, where i={1,2,…,n}, n represents the number of test equipment and is a natural number greater than 1; collect each calibration moment of the corresponding target equipment i, calculate the time difference between two adjacent groups of calibration moments to obtain the calibration time difference, sum and calculate all calibration time differences and take the average to obtain the calibration reference value, and calculate the time difference between the current moment and the adjacent last calibration moment to obtain the measured calibration interval length;

[0039] The measured calibration interval is subtracted from the calibration reference value to obtain a calibration evaluation value, and the calibration evaluation value is numerically compared with the corresponding preset calibration evaluation threshold. If the calibration evaluation value exceeds the corresponding preset calibration evaluation threshold, a timely calibration signal of the corresponding target device i is generated; if the calibration evaluation value does not exceed the corresponding preset calibration evaluation threshold, the number of working times and the duration of each working time of the target device i within the measured calibration interval, as well as the number of maintenance times and the duration of each maintenance of the target device i within the measured calibration interval are collected, and each working time is summed up to obtain the total working time, and each maintenance time is summed up to obtain the total maintenance time, and the preset calibration evaluation threshold is subtracted from the calibration evaluation value to obtain a calibration analysis value;

[0040] The calibration reanalysis value JZi is obtained by normalizing the working times GTi1, total working time GTi2, maintenance times GTi3, total maintenance time GTi4 and calibration analysis value GTi5 of the target device i within the measured calibration interval through the formula JZi=(c1*GTi1+c2*GTi2+c5) / (c3*GTi3+c4*GTi4+c5*GTi5+c1); among them, c1, c2, c3, c4 and c5 are preset proportional coefficients, c1, c2, c3, The values ​​of c4 and c5 are both greater than zero; and, as can be seen from the above formula, the value of the calibration reanalysis value JZi is directly proportional to the number of working times GTi1 and the total working time GTi2, and is inversely proportional to the number of maintenance times GTi3 and the total maintenance time GTi4 as well as the calibration analysis value GTi5; the larger the value of the calibration reanalysis value JZi, the more timely the corresponding target device i needs to be calibrated to ensure the accuracy of its test results and normal use, which serves to remind the test personnel to calibrate the corresponding equipment in time;

[0041] The equipment correction factor β is obtained through analysis, specifically: the production date of the target equipment i is obtained, the time difference between the current date and the production date is calculated to obtain the production interval duration, and the historical working times and each working time of the target equipment i within the production interval duration are obtained, and each working time is summed up to obtain the historical working time value, and the production interval duration KTi1, the historical working times KTi2 and the historical working time value KTi3 are numerically calculated through the formula JPi=tu1*KTi1+tu2*KTi2+tu3*KTi3 to obtain the correction influence coefficient JPi; wherein tu1, tu2, and tu3 are preset weight coefficients, and the values ​​of tu1, tu2, and tu3 are all greater than zero, and tu2>tu3>tu1;

[0042] Moreover, the numerical value of the correction influence coefficient JPi is proportional to the production interval KTi1, the historical work times KTi2 and the historical working hours KTi3. The larger the numerical value of the correction influence coefficient JPi is, the greater the adverse effect on the equipment test accuracy is. The correction influence coefficient is numerically compared with the preset correction influence coefficient range. If the correction influence coefficient exceeds the maximum value of the preset correction influence coefficient range, the equipment correction factor β is assigned a value of b1. If the correction influence coefficient is within the preset correction influence coefficient range, the equipment correction factor β is assigned a value of b2. If the correction influence coefficient does not exceed the minimum value of the preset correction influence coefficient range, the equipment correction factor β is assigned a value of b3, and b1>b2>b3>0, so as to improve the accuracy of calibration timeliness analysis.

[0043] The calibration reanalysis value is multiplied by β and the product of the two is marked as the calibration strategy value. The larger the calibration strategy value is, the more timely the calibration check of the corresponding equipment is needed. The calibration strategy value is numerically compared with the corresponding preset calibration strategy threshold. If the calibration strategy value exceeds the preset calibration strategy threshold, a timely calibration signal for the corresponding target device i is generated. If the calibration strategy value does not exceed the preset calibration strategy threshold, it is determined that the corresponding target device i does not need to be calibrated, so that the corresponding target device i can be calibrated in time, thereby ensuring the accuracy of its test results. If all test equipment does not need to be calibrated, it indicates that there is no need to check and calibrate the equipment at present, the test preparation operation is unobstructed, and the optical fiber signal test can be performed immediately, then a qualified accuracy signal is generated.

[0044] When conducting a fiber optic signal test, the fiber optic signal detection and comparison module generates a fiber optic signal qualification signal, a test failure high-level warning signal, or a test failure low-level warning signal of the corresponding fiber through analysis. When the test failure high-level warning signal or the test failure low-level warning signal is generated, it is sent to the test display warning terminal through the processor to issue a corresponding warning, so that the test personnel can grasp the fiber optic signal test results in detail and the test results are more accurate. Among them, the specific operation process of the fiber optic signal detection and comparison module is as follows:

[0045] By measuring the optical power values ​​at multiple positions on the optical fiber, the optical power loss value per unit length of the optical fiber is obtained and the attenuation coefficient of the optical fiber is calculated, and the average attenuation value is obtained by calculating the average optical power loss of the optical fiber over the entire length range; and by measuring the dispersion characteristics of the optical fiber at different wavelengths or different speeds, the dispersion shift value of the optical fiber is obtained, wherein dispersion refers to the different transmission speeds of the optical fiber for optical signals of different wavelengths or different frequencies, resulting in the distortion of the optical signal during the optical fiber transmission process. Dispersion will cause the distortion of the optical signal, thereby reducing the transmission rate and transmission distance of the optical fiber communication system; by measuring the dispersion characteristics of the optical fiber in different modes, the inter-modal dispersion value of the optical fiber is obtained, wherein the inter-modal dispersion refers to the difference in transmission speeds between optical signals of different modes in the optical fiber, resulting in the distortion of the optical signal during the optical fiber transmission process. Inter-modal dispersion will cause the distortion of the optical signal, thereby reducing the transmission rate and transmission distance of the optical fiber communication system;

[0046] Perform error calculation on each group of actual values ​​obtained from the test and the corresponding theoretical values, and obtain the attenuation coefficient error value, average attenuation error value, dispersion displacement error value and inter-mode dispersion error value through error calculation. If the error calculation values ​​of all test items do not exceed the corresponding error value requirements, that is, all the above test items meet the requirements, then a fiber optic signal test qualified signal is generated; if there is an error calculation value that exceeds the corresponding error value requirements, then the error value of the corresponding test item is marked as a high-bias error value, and the deviation value of the high-bias error value compared to the corresponding error value requirements is marked as an error deviation coefficient; compare the error deviation coefficient with the preset error deviation coefficient range of the corresponding test item. If the error deviation coefficient exceeds the maximum value of the preset error deviation coefficient range, it indicates that the deviation degree of the corresponding test item is very serious, then the corresponding test item is marked as an over-biased item. If the error deviation coefficient is within the preset error deviation coefficient range, then the corresponding test item is marked as a medium-biased item. If the error deviation coefficient does not exceed the minimum value of the preset error deviation coefficient range, it indicates that the deviation degree of the corresponding test item is small, then the corresponding test item is marked as a slightly-biased item.

[0047] If there are over-biased items in the corresponding optical fiber signal test, a high-level warning signal of test failure is generated. If there are no over-biased items in the corresponding optical fiber signal test, the number of medium-biased items and the number of slightly-biased items are obtained and marked as HQ and TQ. The number of medium-biased items HQ and the number of slightly-biased items TQ are weighted and summed by the formula CF=(eu1*HQ+eu2*TQ) / (eu1+eu2), and the test feedback value CF is obtained, wherein eu1 and eu2 are preset proportional coefficients and eu1>eu2>0; and the larger the value of the test feedback value CF is, the worse the optical fiber signal test result is; the test feedback value CF is numerically compared with the preset test feedback threshold value, and if the test feedback value CF exceeds the preset test feedback threshold value, a high-level warning signal of test failure is generated; if the test feedback value CF does not exceed the preset test feedback threshold value, a low-level warning signal of test failure is generated.

[0048] Embodiment 2: Figure 2 As shown, the difference between this embodiment and embodiment 1 is that when generating a fiber optic signal test qualified signal or a test unqualified low-level warning signal, the processor sends the fiber optic signal test qualified signal or the test unqualified low-level warning signal to the fiber optic signal auxiliary analysis module, and the fiber optic signal auxiliary analysis module generates an auxiliary analysis qualified signal or an auxiliary analysis unqualified signal through analysis, and sends the auxiliary analysis unqualified signal to the test display warning terminal through the processor, and the test display warning terminal displays the signal and issues a corresponding warning; the specific analysis process of the fiber optic signal auxiliary analysis module is as follows:

[0049] The optical fiber link loss value, eye diagram value, polarization value and bit error rate value (bit error rate indicates the error rate of the digital signal transmitted by the test optical fiber) in the process of optical fiber signal testing are obtained. It should be noted that the optical fiber link loss refers to the amount of energy loss of the optical signal during the optical fiber transmission process. The optical fiber link loss includes reflection loss, connector loss, fusion loss, splitter loss, flange loss, etc.; and, if the influence of inter-code crosstalk and noise is small, the eye diagram will be larger, otherwise it will be smaller. The larger the eye diagram value, the better the transmission quality of the digital signal; polarization refers to the polarization state of the signal in the test optical fiber, that is, the state of the electric field vector of the optical signal when it propagates in the optical fiber. Under ideal conditions, the optical signal in the optical fiber should be completely polarized, but in actual conditions, the optical signal in the optical fiber may be affected by various factors, causing its polarization state to change; when testing the polarization state of the optical fiber, a polarimeter and other equipment are usually used for measurement. The larger the value obtained, the better the polarization state of the optical signal, and vice versa.

[0050] The optical fiber link loss value, eye diagram value, polarization value and bit error rate value are numerically compared with the preset optical fiber link loss threshold, preset eye diagram threshold, preset polarization threshold and preset bit error rate threshold, respectively. If the optical fiber link loss value and the bit error rate value do not exceed the corresponding preset thresholds and the eye diagram value and the polarization value exceed the corresponding preset thresholds, auxiliary strategy analysis is performed. In other cases, an auxiliary analysis failure signal is generated, that is, when there are numerical items that do not meet the requirements, it indicates that the auxiliary analysis is unqualified; the auxiliary strategy analysis is specifically as follows: the optical fiber link loss value LS, the eye diagram value YT, the polarization value PZ and the bit error rate value WL are numerically calculated by the formula FP=ep1*LS+ep4*WL+ep2 / YT+ep3 / PZ to obtain the auxiliary analysis value FP;

[0051] Among them, ep1, ep2, ep3, and ep4 are preset proportional coefficients, and the values ​​of ep1, ep2, ep3, and ep4 are all greater than zero, and the numerical value of the auxiliary analysis value FP is proportional to the optical fiber link loss value LS and the bit error rate value WL, and is inversely proportional to the eye diagram value YT and the polarization value PZ; the larger the numerical value of the auxiliary analysis value FP is, the worse the optical fiber signal test result is; the auxiliary analysis value FP is numerically compared with the preset auxiliary analysis threshold, the values ​​of the preset auxiliary analysis threshold are a1 and a2, and a1>a2>0, if the optical fiber signal test qualified signal is obtained, the value of the preset auxiliary analysis threshold is a1, and if the test unqualified low-level warning signal is obtained, the value of the preset auxiliary analysis threshold is a2; by assigning preset auxiliary analysis thresholds with different numerical values ​​to improve the overall accuracy of the optical fiber signal test result, if the auxiliary analysis value FP exceeds the corresponding preset auxiliary analysis threshold, an auxiliary analysis unqualified signal is generated, and if the auxiliary analysis value FP does not exceed the corresponding preset auxiliary analysis threshold, an auxiliary analysis qualified signal is generated.

[0052] The working principle of the present invention is as follows: when in use, the light source and the light receiver are pre-prepared and analyzed through the test pre-preparation analysis module to assign the light source a judgment symbol GY-1 or GY-2 and the light receiver a judgment symbol GJ-1 or GJ-2, and a preliminary preparation qualified signal or a preliminary preparation unqualified signal is generated accordingly, and when the preliminary preparation qualified signal is generated, the test equipment calibration analysis module is used to calibrate and analyze the test equipment one by one, and the calibration analysis is used to determine whether a timely calibration signal for the corresponding test equipment is generated. If all test equipment do not need to be standardized, an accuracy qualified signal is generated, which is conducive to the test personnel to adjust the equipment in time to ensure the accuracy of the test results and the smoothness of the test process. The optical fiber signal detection and comparison module generates an optical fiber signal qualification signal, a test failure high-level warning signal or a test failure low-level warning signal of the corresponding optical fiber through analysis. When the test failure high-level warning signal or the test failure low-level warning signal is generated, it is sent to the test display warning terminal through the processor to issue a corresponding warning, so that the test personnel can grasp the optical fiber signal test results in detail and the test results are more accurate. When the optical fiber signal test qualification signal or the test failure low-level warning signal is generated, the optical fiber signal auxiliary analysis module is used to analyze to generate an auxiliary analysis qualification signal or an auxiliary analysis failure signal, so as to realize a comprehensive and effective analysis of the optical fiber signal test to improve the accuracy of the test results.

[0053] The above formulas are all dimensionless and numerical calculations. The formula is a formula obtained by collecting a large amount of data and performing software simulation to obtain the most recent real situation. The preset parameters in the formula are set by technicians in this field according to actual conditions. The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can understand and use the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An optical fiber signal testing system, characterized in that: It includes a processor, a test pre-preparation analysis module, a test equipment calibration analysis module, an optical fiber signal detection and comparison module, and a test display and warning terminal; The test pre-preparation analysis module performs pre-preparation analysis on the light source and the optical receiver used for the optical fiber signal test, assigns the light source a judgment symbol GY-1 or GY-2 and the optical receiver a judgment symbol GJ-1 or GJ-2 through the pre-preparation analysis, and generates a preliminary preparation qualified signal or a preliminary preparation unqualified signal accordingly, sends the preliminary preparation qualified signal to the test equipment calibration analysis module via the processor, and sends the preliminary preparation unqualified signal to the test display warning terminal via the processor, and the test display warning terminal issues a corresponding warning after receiving the preliminary preparation unqualified signal; The test equipment calibration analysis module performs calibration analysis on all test equipment used for optical fiber signal testing one by one, and determines whether to generate timely calibration signals for corresponding test equipment through calibration analysis. If all test equipment do not need to be calibrated, a qualified accuracy signal is generated, and the qualified accuracy signal and the timely calibration signal as well as the corresponding test equipment are sent to the test display and early warning terminal via the processor. After receiving the qualified accuracy signal, the optical fiber signal test is started, and when the timely calibration signal is received, the corresponding test equipment is checked and calibrated; When conducting a fiber optic signal test, the fiber optic signal detection and comparison module generates a fiber optic signal qualification signal, a test failure high-level warning signal, or a test failure low-level warning signal of the corresponding fiber through analysis. When the test failure high-level warning signal or the test failure low-level warning signal is generated, it is sent to the test display warning terminal through the processor to issue a corresponding warning; The specific analysis process of the pre-test preparation analysis module is as follows: Obtain a light source and an optical receiver for optical fiber signal testing, collect the wavelength and power of the corresponding light source, compare the wavelength and power of the corresponding light source with the preset wavelength range and the preset power range respectively, if the wavelength and power of the corresponding light source are both within the corresponding preset range, then the light source is judged to be qualified and assigned a light source determination symbol GY-1; if the wavelength of the corresponding light source is not within the preset wavelength range or the power is not within the preset power range, then the light source is judged to be unqualified and assigned a light source determination symbol GY-2; and collecting the sensitivity and bandwidth of the corresponding optical receiver, comparing the sensitivity and bandwidth of the corresponding optical receiver with the preset sensitivity range and the preset bandwidth range respectively; if the sensitivity and bandwidth of the corresponding optical receiver are both within the corresponding preset range, the optical receiver is judged to be qualified and a determination symbol GJ-1 is assigned to the optical receiver; if the sensitivity of the corresponding optical receiver is not within the preset sensitivity range or the bandwidth is not within the preset bandwidth range, the optical receiver is judged to be unqualified and a determination symbol GJ-2 is assigned to the optical receiver; Perform intersection analysis on the light source judgment symbol and the light receiver judgment symbol. If the intersection result is GY-1∩GJ-1, a preliminary preparation qualified signal is generated. In other cases, a preliminary preparation unqualified signal is generated, and the preliminary preparation qualified signal is sent to the test equipment calibration analysis module through the processor; The specific analysis process of the test equipment calibration analysis module includes: Acquire all the test equipment used for optical fiber signal testing, mark the corresponding test equipment as target equipment i, i={1,2,…,n}, n represents the number of test equipment and n is a natural number greater than 1; collect each calibration moment of the corresponding target equipment i, calculate the time difference between two adjacent groups of calibration moments to obtain the calibration time difference, sum and calculate all the calibration time differences and take the average to obtain the time reference value, calculate the time difference between the current moment and the adjacent last calibration moment to obtain the measured calibration interval time, subtract the calibration reference value from the measured calibration interval time to obtain the calibration evaluation value, and if the calibration evaluation value exceeds the corresponding preset calibration evaluation threshold, generate a timely calibration signal for the corresponding target equipment i; If the timing evaluation value does not exceed the corresponding preset timing evaluation threshold, the number of working times and the duration of each working time of the target device i within the measured timing interval, as well as the number of maintenance times and the duration of each maintenance of the target device i within the measured timing interval are collected, and the total working time is calculated by summing up each maintenance time to obtain the total maintenance time, and the preset timing evaluation threshold is subtracted from the timing evaluation value to obtain the timing analysis value; Normalize the working times, total working time, maintenance times and total maintenance time of the target device i within the measured calibration interval and the calibration analysis value to obtain the calibration reanalysis value; obtain the device correction factor β through analysis, multiply the calibration reanalysis value by β and mark the product of the two as the calibration strategy value; compare the calibration strategy value with the corresponding preset calibration strategy threshold, if the calibration strategy value exceeds the preset calibration strategy threshold, generate a timely calibration signal for the corresponding target device i, if the calibration strategy value does not exceed the preset calibration strategy threshold, it is determined that the corresponding target device i does not need to be calibrated, if all test devices do not need to be calibrated, then generate an accuracy qualified signal; The specific analysis process of obtaining the equipment correction factor β through analysis is as follows: The production date of the target device i is obtained, the time difference between the current date and the production date is calculated to obtain the production interval duration, and the historical working times and each working time of the target device i within the production interval duration are obtained, each working time is summed up to obtain the historical working time value, and the production interval duration, the historical working times and the historical working time values ​​are numerically calculated to obtain the correction influence coefficient; the correction influence coefficient is numerically compared with the preset correction influence coefficient range, if the correction influence coefficient exceeds the maximum value of the preset correction influence coefficient range, the device correction factor β is assigned a value of b1, if the correction influence coefficient is within the preset correction influence coefficient range, the device correction factor β is assigned a value of b2, if the correction influence coefficient does not exceed the minimum value of the preset correction influence coefficient range, the device correction factor β is assigned a value of b3, and b1>b2>b3>0.

2. The optical fiber signal testing system according to claim 1, characterized in that: The specific operation process of the optical fiber signal detection and comparison module includes: By measuring the optical power values ​​at multiple positions on the optical fiber, the optical power loss value per unit length of the optical fiber is obtained and the attenuation coefficient of the optical fiber is calculated, and the average attenuation value is obtained by calculating the average optical power loss of the optical fiber in the entire length range; and by measuring the dispersion characteristics of the optical fiber at different wavelengths or different speeds, the dispersion shift value of the optical fiber is obtained, and by measuring the dispersion characteristics of the optical fiber in different modes, the inter-modal dispersion value of the optical fiber is obtained; the error calculation is performed between each group of actual values ​​obtained by the test and the corresponding theoretical values, and the attenuation coefficient error value, the average attenuation error value, the dispersion shift error value and the inter-modal dispersion error value are obtained through the error calculation. If the error calculation values ​​of all the test items do not exceed the corresponding error value requirements, a fiber signal test qualified signal is generated; If there is an error calculated value that exceeds the corresponding error numerical requirement, the error value of the corresponding test item shall be marked as a high-bias error value, and the deviation value of the high-bias error value compared to the corresponding error numerical requirement shall be marked as an error deviation coefficient; the error deviation coefficient shall be numerically compared with the error deviation coefficient range of the corresponding test item, if the error deviation coefficient exceeds the maximum value of the preset error deviation coefficient range, the corresponding test item shall be marked as an over-biased item, if the error deviation coefficient is within the preset error deviation coefficient range, the corresponding test item shall be marked as a medium-biased item, if the error deviation coefficient does not exceed the minimum value of the preset error deviation coefficient range, the corresponding test item shall be marked as a slightly-biased item; If there are over-biased items in the corresponding optical fiber signal test, a high-level warning signal of test failure is generated; if there are no over-biased items in the corresponding optical fiber signal test, the number of medium-biased items and the number of slightly-biased items are weighted and summed to obtain the test feedback value, and the test feedback value is numerically compared with the preset test feedback threshold. If the test feedback value exceeds the preset test feedback threshold, a high-level warning signal of test failure is generated; if the test feedback value does not exceed the preset test feedback threshold, a low-level warning signal of test failure is generated.

3. The optical fiber signal testing system according to claim 2, characterized in that: When generating a fiber optic signal test pass signal or a test fail low-level warning signal, the processor sends the fiber optic signal test pass signal or the test fail low-level warning signal to the fiber optic signal auxiliary analysis module, and the fiber optic signal auxiliary analysis module generates an auxiliary analysis pass signal or an auxiliary analysis fail signal through analysis, and sends the auxiliary analysis fail signal to the test display and warning terminal via the processor, and the test display and warning terminal displays the signal and issues a corresponding warning.

4. The optical fiber signal testing system according to claim 3, characterized in that: The specific analysis process of the optical fiber signal auxiliary analysis module is as follows: Obtain the optical fiber link loss value, eye diagram value, polarization value and bit error rate value in the optical fiber signal test process, and compare the optical fiber link loss value, eye diagram value, polarization value and bit error rate value with the preset optical fiber link loss threshold, preset eye diagram threshold, preset polarization threshold and preset bit error rate threshold respectively; if the optical fiber link loss value and the bit error rate value do not exceed the corresponding preset thresholds and the eye diagram value and the polarization value exceed the corresponding preset thresholds, perform auxiliary strategy analysis, and generate an auxiliary analysis unqualified signal in other cases; When performing auxiliary strategy analysis, the optical fiber link loss value, eye diagram value, polarization value and bit error rate value are numerically calculated to obtain an auxiliary analysis value; the auxiliary analysis value is numerically compared with the preset auxiliary analysis threshold, and the values ​​of the preset auxiliary analysis threshold are a1 and a2, and a1>a2>0. If a qualified signal of the optical fiber signal test is obtained, the value of the preset auxiliary analysis threshold is a1, and if a low-level warning signal of unqualified test is obtained, the value of the preset auxiliary analysis threshold is a2; If the auxiliary analysis value exceeds the corresponding preset auxiliary analysis threshold, an auxiliary analysis unqualified signal is generated; if the auxiliary analysis value does not exceed the corresponding preset auxiliary analysis threshold, an auxiliary analysis qualified signal is generated.

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