CN104158585A - Establishment method for optical fiber fault ageing model - Google Patents
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Abstract
The invention discloses an establishment method for an optical fiber fault ageing model and belongs to the technical field of electric power and communication. The method comprises the following steps: firstly, analyzing the parameter indexes influencing the optical fiber reliability environment; then, acquiring accurate and reliable data through experiments; establishing an optical fiber fault model and an optical fiber ageing prediction model by utilizing the regression analysis method, wherein the experiment is mainly divided into two parts, namely, a splice loss experiment and a non-splice loss experiment; the splice loss experiment mainly comprises a fusion loss experiment and a connector loss experiment; the non-splice loss experiment mainly comprises a bend loss experiment, a temperature-humidity circulating experiment, an immersion experiment and a damp-heat experiment. The method is based on a statistic experiment and the regression analysis method, and is more practical than a simple theoretical analysis result; the advanced experimental equipment and the scientific experimental method are adopted, so that the objectivity and accuracy of the experiment data and model are guaranteed.
Description
Technical field
The invention belongs to electric power and communication technical field, relate to a kind of method for building up of fiber failure Ageing Model.
Background technology
In power telecommunication network, apply more and more universally along with optical fiber, it is more and more important that the reliability of optical fiber and malfunction monitoring also just seem.Meanwhile, because China region is wide, various places environmental difference is larger, and the operation environment of optical fiber is also very complicated, and the loss of optical fiber is usually the principal element that causes power optical fiber Cable's Fault.
In order to make maintenance person can make rapid processing to the failure condition of electric power optical cable in optical cable maintenance process, and service provides quick response to electricity market, ensure provides reliable, the economic energy to user simultaneously, need to monitor the fault aging conditions of optical fiber, this be also to the communications infrastructure safeguard and construct in a crucial step.Therefore,, in the communication network of electric power system, to optical fibre fault monitoring, technical research has been placed in a very important position.
At present, most of research institutions and scientific research institutions are to optical fibre fault monitoring be all partial to theorize exploration and the research of (as fuzzy theory, artificial neuron etc.), carry out application and data analysis and condition diagnosing, this is difficult for grasping concerning user of service, does not take into full account line O&M personnel operability.Optical cable is in construction and long-term use procedure, be subject under the impact of effect of stress or environmental factor, cause the increase of attenuation, to the maintenance of optical cable, at present also there is no to instruct with reference to practical standard method the upkeep operation of optical fiber, lack optical fiber fault judging means easily and efficiently in real work.The study on monitoring of power optical fiber can fully be used for reference the achievement in research of common communication, but can not simply indiscriminately imitate achievement, also must consider on the basis of the particularity such as network characterization, operational management of power optical fiber communication, in conjunction with electric power system reality, the key technology of further investigation fiber-optic monitoring, for its monitoring network process of construction provides support.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method for building up of fiber failure Ageing Model, by the theory analysis of science and a large amount of experimental datas, set up the function model between all kinds of influencing factors and optical fiber link loss, and propose a set of simple and practical optical fiber reliability and life-span evaluation method according to this model.
For achieving the above object, the invention provides following technical scheme:
A method for building up for fiber failure Ageing Model, comprises the following steps: the first parameter index of analyzing influence optical fiber reliability environment; Again by experiment, obtain accurate, reliable data; Then utilize the method for regression analysis, set up fault model and the optical fiber ageing predetermination model of optical fiber.
Further, described experiment is mainly divided into two parts, connecting loss experiment and non-connecting loss experiment; Connecting loss mainly comprises that carrying out splice loss, splice attenuation experiment tests with connector loss; Non-connecting loss experiment mainly comprises carries out bending loss experiment, temperature-humidity circulation experiment, immersion test and damp and hot experiment.
Further, set up the fault model between optical fiber link loss and its fault, adopt and under laboratory environment, carry out the optical fiber link loss that fusion point, the connector etc. in engineering causes to optical fiber; By the loss analysis between the parameter such as fusion point, the quantity of connector and the communication link of accumulative total, the fault to optic communication links and connecting loss bottleneck node judge; Then, the product information and the actual operating data that provide according to equipment vendors are revised reliability model, further to improve the accuracy of model; And then provide theoretical foundation for the judgement of fiber failure in Practical Project.
Further, the foundation of described Ageing Model comprises analyzes aging that power optical fiber causes in the impact that is subject to various environmental factors, by researching and analysing, combing causes factor and the technical indicator that optical cable is aging, under laboratory environment, carry out temperature, humiture, immersion, the optical fiber senile experiment such as damp and hot, xeothermic, to adopt mathematical analysis model, above-mentioned factors is quantized, set up the optical fiber Ageing Model between aging action and degree of aging, propose a set of simple, practical optical fiber reliability and the evaluation method in life-span.
Further, described environment loss experiment comprises following five kinds of experiments: temperature experiment, temperature-humidity circulation experiment, immersion test, damp and hot experiment and xeothermic senile experiment;
Described temperature experiment comprises: measuring junction is measured the light of output by light power meter; Adopt baking oven as heater; Adopt thermometer to carry out the residing ambient temperature of Real-Time Monitoring optical fiber; Optical fiber is placed, and its major part is all put among baking oven, only has input and output side respectively to have very little one section not heated;
Described temperature-humidity circulation experiment is included under the test environment of temperature, and in the temperature range providing, the relative humidity of increase by 98% is carried out circulation experiment optical fiber property situation of change;
Described immersion test is divided into manual simulation's environmental condition that seeps water, and the protective sleeve outside optical cable carries out horizontal infiltration to infiltration in optical cable, carries out longtitudinal dispersion, measuring fiber attenuation trend in local damage or the junction of cable protection layer;
Described damp and hot experiment is included under temperature test environment, and 85 degrees Celsius and 85% relative humidity are provided in incubator, 30 days observing times, experiment optical fiber property situation of change;
Described xeothermic senile experiment is included under temperature test environment, provides 85 DEG C in incubator, 30 days observing times, experiment optical fiber property situation of change.
Beneficial effect of the present invention is: the method for building up of fiber failure Ageing Model of the present invention is based on statistical experiment and regression analysis, more practical than simple theoretical analysis result, and the advanced experiment equipments adopting and the experimental technique of science, ensured the objective and accurate of experimental data and model.
Brief description of the drawings
In order to make object of the present invention, technical scheme and beneficial effect clearer, the invention provides following accompanying drawing and describe:
Fig. 1 is connector loss test schematic diagram;
Fig. 2 is bending loss test schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
In the method, first analyzing influence optical fiber reliability environmental parameter index, more by experiment, obtain accurate, reliable data.Whole experiment is mainly divided into two parts, connecting loss experiment and non-connecting loss experiment.Connecting loss mainly carries out splice loss, splice attenuation experiment and connector loss experiment; Mainly carry out bending loss experiment, temperature-humidity circulation experiment, immersion test, damp and hot experiment etc. for non-connecting loss.Then utilize the method for regression analysis, set up fault model and the optical fiber ageing predetermination model of optical fiber.
Fault model:
Adopt and under laboratory environment, carry out the optical fiber link loss that fusion point, the connector etc. in engineering causes to optical fiber, set up the fault model between optical fiber link loss and its fault.By the loss analysis between the parameter such as fusion point, the quantity of connector and the communication link of accumulative total, the fault to optic communication links and connecting loss bottleneck node judge.Then, the product information and the actual operating data that provide according to equipment vendors are revised reliability model, further to improve the accuracy of model.And then provide theoretical foundation for the judgement of fiber failure in Practical Project.
To carry out respectively splice loss, splice attenuation test for optical fiber link loss below analyzes with connector loss experiment:
Splice loss, splice attenuation experiment: fused fiber splice quality generally judges by splice loss, splice attenuation and fusion point intensity.Improving and improving optical fiber align technology is the main path that improves welding quality, reduces splice loss, splice attenuation.To welding index according to the relevant regulations to single joint, polylinker in the three large international standards of international telecommunication union telecommunication's Standardization Sector the 6th ETSI of seminar 300 783, IEC 1073-1, Bellcore.For the domestic standard that there is no prescribed specific, be generally that the average splice loss, splice attenuation standard of hop single fiber proposing with reference to Zhengzhou designing institute of former Information Industry Department designs use.The principal element that causes fiber optic splicing loss has fiber axis inclination, fiber axis to depart from and mould field mismatch.Its capital equipment is Fujikura FSM-40PM electric arc optical fiber splicer, and main tool has optical cable to cut, shell fat pincers, wipe fine paper, cutter.Can be divided into the aspect researchs such as same model fused fiber splice, different-diameter difference fused fiber splice, the mixed welding of different manufacturers model optical fiber for welding experiment.Single joint quality is carried out to analysis and evaluation, after hop has connected, whole splicing loss is assessed.Its step is first by the tail optical fiber of setted wavelength (monomode fiber) and tested optical fiber welding, and the Output optical power of the measuring optical fiber other end; Then this root optical fiber is blocked as two parts, and to welding again after its ends cutting and clean processing, measure secondary Output optical power; Can obtain the splice loss, splice attenuation between this two ends optical fiber according to twice measurement result.The length certain (about 2m) of the optical fiber that experiment is used, thereby confinement loss is negligible, i.e. the loss of experiment measuring gained is the splice loss, splice attenuation between optical fiber.Finally the experimental result of test is carried out to statistical analysis, set up the function model between splice loss, splice attenuation and welding operation.
Connector loss experiment: adopt standard wire jumper Comparison Method, as shown in Figure 1.Monomode fiber is adopted and is less than 50m, negligible to the loss of tail optical fiber self, need measuring fiber own loss value if exceed 50m.To same connector plug, repeatedly repeating plug calculating.And insertion and extraction head two ends are exchanged and again repeatedly repeat plug calculating.Its computing formula is CL=-10lgP
1/ P
0(dB), wherein P1 is Output optical power, and P0 is input optical power.CL is the loss after connector inserts.
Ageing Model:
Analyze aging that power optical fiber causes in the impact that is subject to various environmental factors, by researching and analysing, combing causes factor and the technical indicator that optical cable is aging, under laboratory environment, carry out temperature, humiture, immersion, the optical fiber senile experiment such as damp and hot, xeothermic, to adopt mathematical analysis model, above-mentioned factors is quantized, set up the optical fiber Ageing Model between aging action and degree of aging, propose a set of simple, practical optical fiber reliability and the evaluation method in life-span.
Below respectively every kind of experiment is analyzed:
Bending loss experiment: in the time of fibre-optical bending, light transmits in sweep, wants to preserve synchronous Electric and magnetic fields in a plane, and the closer to outside, its speed will be larger.In the time of a certain position of conduction, its speed will exceed the light velocity, this means that conduction mode will become radiation mode.So a part for light beam power can lose, this also means that decay will increase.The extrinsic loss of optical fiber, mainly comprises radiation loss and application loss, and radiation loss is mainly to have due to optical fiber fabrication technique, and application loss is to be caused by the tension force of optical fiber, bending extruding, is mainly macrobending loss.The supplementary load loss that many bendings (macrobend) that the radius of curvature of macrobending loss optical fiber is larger than fibre diameter cause, main cause have route turn and lay in bending; The various reserved bending causing (reserved circle, natural torsion) of optical fiber cable; In connector box the dish of optical fiber stay, the coiling etc. of tail optical fiber in machine room and equipment.The supplementary load loss that the bending (micro-curved) of microbending loss fiber axis generation μ m level causes, main cause has: when optical fiber cabling, the irregular randomness that causes each several part unbalance stress and form that area supported is small is micro-curved; The rough formation of interface of fibre core and covering micro-curved; When fiber cable laying, everywhere tension force inhomogeneous and form micro-curved; Lateral pressure that optical fiber is subject to inhomogeneous and form micro-curved; Optical fiber runs into variations in temperature, micro-curved because of what expand with heat and contract with cold and form.Device therefor comprises light source, light power meter, optical fiber splicer, fiber cutter, monomode fiber.Its step is divided into: a), optical fiber is sticked on two hold-down bars, a hold-down bars, at a distance of 2mm, is fixed in two hold-down bars tops, turns another root hold-down bars and change the flexibility of optical fiber at a plane internal rotation; B), by test flexibility β, the reading of the light power meter under 16 ° is changed to base value.Then β is increased to 70 ° (increasing by 2 °) from 16 ° at every turn, test light power meter reading, the difference of this value and initial value is the bending loss under this angle.Average for N time to calculate by taking; C), be further to analyze relatively by the bending loss of the optical fiber power under different wave length, carry out corresponding curve by drawing the long lower fibre-optical bending angle of Different lightwave with bending loss value, and digital simulation equation and drafting matched curve respectively.As shown in Figure 2.
Environment loss experiment: under environmental impact, the performance of optical fiber also can cause loss in various degree, assesses fibre loss reason by simulate various environmental forms in laboratory.The in use variation of performance of optical fiber (aging) is mainly that following experimental situation acts on and causing, carrys out simulated environment and test to evaluate the reliability of optical cable by reference to GB/T 15972.5-1998 standard.Mainly comprise following 5 kinds of experiments:
Temperature experiment: consider that significantly changing of temperature cause to optical fiber lateral pressure improperly, thereby affect the service bearer ability of optical fiber.Its step is divided into: measuring junction is measured the light of output by light power meter; Adopt baking oven as heater; Adopt thermometer to carry out the residing ambient temperature of Real-Time Monitoring optical fiber; Optical fiber is placed, and its major part is all put among baking oven, only has input and output side respectively to have very little one section not heated.First preheating two hours of system, then starts to heat up, measure, and measuring intervals of TIME is 1 hour, and this is stablize and make optical fiber fully be heated to stable temperature point in order to ensure that oven temperature reaches.Measuring temperature range is-60 DEG C to 85 DEG C, is a measurement point every 10 DEG C.
Temperature-humidity circulation experiment: under the test environment of temperature, in the temperature range providing, the relative humidity of increase by 98% is carried out circulation experiment optical fiber property situation of change.
Immersion test: optical fiber surface has micro-crack or after connector is loosening, the steam in atmospheric environment is easy to corrode optical fiber, causes the antifatigue parameter of optical fiber self greatly to decline.Its step is divided into manual simulation's environmental condition that seeps water, and the protective sleeve outside optical cable carries out horizontal infiltration to infiltration in optical cable, carries out longtitudinal dispersion, measuring fiber attenuation trend in local damage or the junction of cable protection layer.
Damp and hot experiment: its method is under temperature test environment provides 85 degrees Celsius and 85% relative humidity in incubator, 30 days observing times, experiment optical fiber property situation of change.
Xeothermic aging: its method is under temperature test environment, in incubator, provide 85 DEG C, 30 days observing times, experiment optical fiber property situation of change.
Finally explanation is, above preferred embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can make various changes to it in the form and details, and not depart from the claims in the present invention book limited range.
Claims (5)
1. a method for building up for fiber failure Ageing Model, is characterized in that: comprise the following steps: the first parameter index of analyzing influence optical fiber reliability environment; Again by experiment, obtain accurate, reliable data; Then utilize the method for regression analysis, set up fault model and the optical fiber ageing predetermination model of optical fiber.
2. the method for building up of a kind of fiber failure Ageing Model according to claim 1, is characterized in that: described experiment is mainly divided into two parts, connecting loss experiment and non-connecting loss experiment; Connecting loss mainly comprises that carrying out splice loss, splice attenuation experiment tests with connector loss; Non-connecting loss experiment mainly comprises carries out bending loss experiment, temperature-humidity circulation experiment, immersion test and damp and hot experiment.
3. the method for building up of a kind of fiber failure Ageing Model according to claim 2, it is characterized in that: set up the fault model between optical fiber link loss and its fault, adopt and under laboratory environment, carry out the optical fiber link loss that fusion point, the connector etc. in engineering causes to optical fiber; By the loss analysis between the parameter such as fusion point, the quantity of connector and the communication link of accumulative total, the fault to optic communication links and connecting loss bottleneck node judge; Then, the product information and the actual operating data that provide according to equipment vendors are revised reliability model, further to improve the accuracy of model; And then provide theoretical foundation for the judgement of fiber failure in Practical Project.
4. the method for building up of a kind of fiber failure Ageing Model according to claim 3, it is characterized in that: the foundation of described Ageing Model comprises analyzes aging that power optical fiber causes in the impact that is subject to various environmental factors, by researching and analysing, combing causes factor and the technical indicator that optical cable is aging, under laboratory environment, carry out temperature, humiture, immersion, damp and hot, the xeothermic optical fiber senile experiment that waits, to adopt mathematical analysis model, above-mentioned factors is quantized, set up the optical fiber Ageing Model between aging action and degree of aging, propose a set of simple, practical optical fiber reliability and the evaluation method in life-span.
5. the method for building up of a kind of fiber failure Ageing Model according to claim 4, is characterized in that: described environment loss experiment comprises following five kinds of experiments: temperature experiment, temperature-humidity circulation experiment, immersion test, damp and hot experiment and xeothermic senile experiment;
Described temperature experiment comprises: measuring junction is measured the light of output by light power meter; Adopt baking oven as heater;
Adopt thermometer to carry out the residing ambient temperature of Real-Time Monitoring optical fiber; Optical fiber is placed, and its major part is all put among baking oven, only has input and output side respectively to have very little one section not heated;
Described temperature-humidity circulation experiment is included under the test environment of temperature, and in the temperature range providing, the relative humidity of increase by 98% is carried out circulation experiment optical fiber property situation of change;
Described immersion test is divided into manual simulation's environmental condition that seeps water, and the protective sleeve outside optical cable carries out horizontal infiltration to infiltration in optical cable, carries out longtitudinal dispersion, measuring fiber attenuation trend in local damage or the junction of cable protection layer;
Described damp and hot experiment is included under temperature test environment, and 85 degrees Celsius and 85% relative humidity are provided in incubator, 30 days observing times, experiment optical fiber property situation of change;
Described xeothermic senile experiment is included under temperature test environment, provides 85 DEG C in incubator, 30 days observing times, experiment optical fiber property situation of change.
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| CN108225732A (en) * | 2017-12-29 | 2018-06-29 | 清华大学 | A kind of fiber optic detection system and method |
| CN109186949A (en) * | 2018-11-14 | 2019-01-11 | 吴美珍 | Combing mould group and optical fibre device test equipment before detection |
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| CN115824292A (en) * | 2022-10-27 | 2023-03-21 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Service life estimation method of power cable |
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| CN104778351A (en) * | 2015-03-31 | 2015-07-15 | 广东电网有限责任公司电力调度控制中心 | ADSS (all dielectric self supporting optic fiber cable) typhoon resistance estimation method at coastal region |
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| CN109756263B (en) * | 2018-12-20 | 2021-01-01 | 新华三大数据技术有限公司 | Optical fiber aging prediction method and device |
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| CN109687903A (en) * | 2018-12-28 | 2019-04-26 | 东南大学 | Optical fiber macrobending on-line monitoring system and method |
| CN110186489A (en) * | 2019-06-28 | 2019-08-30 | 中国南方电网有限责任公司超高压输电公司广州局 | A kind of submarine cable temperature stress imitative experimental appliance and method on the bank |
| CN110186489B (en) * | 2019-06-28 | 2023-12-15 | 中国南方电网有限责任公司超高压输电公司广州局 | Submarine cable temperature stress onshore simulation experiment device and method |
| TWI700907B (en) * | 2019-12-02 | 2020-08-01 | 中華電信股份有限公司 | Diagnosis method for optical fiber loop obstacle |
| CN111855145A (en) * | 2020-07-30 | 2020-10-30 | 成都中住光纤有限公司 | Use method of optical fiber macrobend testing device |
| CN112861392A (en) * | 2021-01-11 | 2021-05-28 | 南京航空航天大学 | Cable aging virtual simulation test platform and method |
| CN112861392B (en) * | 2021-01-11 | 2024-06-14 | 南京航空航天大学 | Virtual simulation test platform and method for cable aging |
| CN114199515A (en) * | 2021-12-09 | 2022-03-18 | 中海石油(中国)有限公司 | Method for testing hydrogen loss aging of underground optical fiber |
| CN115824292A (en) * | 2022-10-27 | 2023-03-21 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Service life estimation method of power cable |
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Application publication date: 20141119 |
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