CN101447832A - Method for measuring performance parameters of optical fiber cable circuit with ultra-long distance - Google Patents
Method for measuring performance parameters of optical fiber cable circuit with ultra-long distance Download PDFInfo
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- CN101447832A CN101447832A CN 200810239781 CN200810239781A CN101447832A CN 101447832 A CN101447832 A CN 101447832A CN 200810239781 CN200810239781 CN 200810239781 CN 200810239781 A CN200810239781 A CN 200810239781A CN 101447832 A CN101447832 A CN 101447832A
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- 238000012360 testing method Methods 0.000 claims abstract description 92
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Abstract
The invention relates to a method for measuring performance parameters of an optical fiber cable circuit with ultra-long distance based on two-way testing curve fitting of dorsad scattering curves of an optical time domain reflectometer. The method comprises the steps as follows: 1) analysis memory of a one-way testing curve; 2) two-way testing curve fitting; and 3) analysis memory of the two-way testing curve. The method can greatly meet the fitting requirements of the two-way testing curve, and the analytical judgment of the two-way testing curve after fitting can be similar to analytical judgment of the one-way testing curve for the engineering technical personnel.
Description
Technical field
The invention belongs to the optical communication technique field, thereby be specifically related to a kind of method of measuring performance parameters of optical fiber cable circuit with ultra-long distance based on the two-way test curve match of optical time domain reflectometer backscattering curve.
Background technology
Adopting optical time domain reflectometer is the common method of optical cable maintenance, fault location to the physical property measurement of fibre circuit.By the backscattering curve that optical time domain reflectometer obtains, can calculate the physical function parameter such as average attenuation, splicing loss, the loss of welding point of lightguide cable link.For the over distance lightguide cable link, owing to be limited by the dynamic range of optical time domain reflectometer, can't measure the backscattering curve of whole lightguide cable link from a direction, need measure simultaneously from the two ends of lightguide cable link.Two backscattering curves that obtain have reacted the performance situation of this section lightguide cable link simultaneously.Observe for convenience and calculate, two backscattering curve fits need be become a backscattering curve, the backscattering curve after the match has reacted the over-all properties situation of this section lightguide cable link.Do not see the open report that two-way test curve match is similarly arranged at present both at home and abroad as yet.
Summary of the invention
The present invention relates to a kind of two-way test curve approximating method, may further comprise the steps based on optical time domain reflectometer backscattering curve:
1. the measurement of unidirectional backscattering curve
The optical time domain reflectometer module that adopts the upright company of day intrinsic safety to provide is carried out unidirectional measurement respectively to the two ends of over distance lightguide cable link, obtains the basic data of unidirectional backscattering curve.
2. the analyzing stored of unidirectional backscattering curve
For the unidirectional backscattering curve basic data that obtains, definition backscattering curve form, the backscattering curve form according to definition carries out analyzing stored to the backscattering curve.
3. the fitting algorithm of two-way test curve
According to the backscattering curve that records from extra long distance lightguide cable link two ends,, calculate new matched curve according to two-way test curve fitting algorithm.
4. the analyzing stored of two-way test curve
For the two-way test curve data after the match,, two-way test curve is stored according to the backscattering curve form of definition.
The present invention proposes a kind of method of measuring performance parameters of optical fiber cable circuit with ultra-long distance specifically, it is characterized in that measuring simultaneously from the two ends of extra long distance lightguide cable link to be measured by optical time domain reflectometer, obtain two backscattering curves, and approximating method becomes a backscattering curve with two backscattering curve fits, backscattering curve after the match reacts the over-all properties situation of this section lightguide cable link, and this method may further comprise the steps:
(1) collection of unidirectional backscattering curve data;
(2) analyzing stored of unidirectional backscattering curve, comprise the basic data of collecting and putting test in order, the structure of definition test parameter, test data, event information, analysis result and warning information, the structure of the data based definition such as test parameter, test data, event information, analysis result and warning information of collecting is write test file in order, and generate unidirectional backscattering curve file;
(3) match of two-way test curve comprises the position of determining match point, and the position of described match point can be specified by user oneself, also can obtain, merge test parameter, merge test data by analyzing two test curve files, fusion event information, the convergence analysis result merges warning information;
(4) analyzing stored of two-way test curve, comprise the two-way test curve curve form of definition, test parameter, test data, event information, analysis result, the warning information of two-wire test curve form after will merging according to definition writes two-way test curve, generates two-way test curve file.
Thereby the present invention has proposed to become a two-way test curve to measure the method for performance parameters of optical fiber cable circuit with ultra-long distance two backscattering curve fits of measuring gained from extra long distance lightguide cable link two ends for the first time, with unidirectional test curve analyzing stored, two-way test curve match, two-way test curve definition storage combines, and has proposed a kind of direct-vision method of new analysis extra long distance lightguide cable link performance.
The system debug of the present invention by Anhui optical cable on-line monitoring system formed a kind of effective match and violated the law, for the Measurement and analysis of overlength circuit lightguide cable link provides new succinct method.
Description of drawings
Fig. 1 shows the structural representation of test macro;
Fig. 2 shows the fitting algorithm flow chart of two-way test curve of the present invention;
Fig. 3 shows the overall flow figure based on the two-way test curve approximating method of optical time domain reflectometer backscattering curve.
Embodiment
Below four steps of the present invention are further detailed:
One, the measurement of unidirectional backscattering curve
The optical time domain reflection module that adopts the upright company of day intrinsic safety to provide is measured unidirectional backscattering curve, at the two ends of extra long distance lightguide cable link the optical time domain reflection module is installed respectively, sends test command to the light time at two ends territory transmitter module respectively from monitoring center.After the optical time domain reflection module is subjected to test command, start testing process, send the test waves of certain pulsewidth and the backscatter signals of the generation of acceptance test ripple in the optical cable fibre core to lightguide cable link.This backscatter signals is as the foundation of lightguide cable link performance.The optical time domain reflectometer module is with the backscatter signals the obtained basic data as the backscattering curve.
Two, the analyzing stored of unidirectional backscattering curve
With the backscattering curve basic data of collecting, analysis and arrangement generates unidirectional backscattering curve file.Mainly comprise:
1 collects and puts in order the basic data of test, the structure of parts such as definition test parameter, test data, event information, analysis result, warning information;
2 structures with data based definition such as the test parameter collected, test data, event information, analysis result, warning information write test file in order;
3 generate unidirectional backscattering curve file.
Three, the fitting algorithm of two-way test curve
Two unidirectional backscattering curves with generating fit to a two-wire test curve.Mainly comprise:
1) determine the position of match point, the position of match point can be specified by user oneself, also can obtain by analyzing two test curve files.
2) merge test parameter
3) merge test data
4) fusion event information
5) convergence analysis result
6) merge warning information
The result of match shows that two-way test matched curve can go to analyze the performance of lightguide cable link fully as individual event backscattering curve.
Four, the analyzing stored of two-way test curve
With the data that match is finished, be stored as two-way test curve file, mainly comprise:
1) the two-way test curve curve form of definition.
2) according to the two-wire test curve form of definition, test parameter, test data, event information, analysis result, warning information after merging are write two-way test curve, generate two-way test curve file.
Below with the be measured as example of the optical cable on-line monitoring system pool in spring and autumn, Anhui to the lightguide cable link of long queue mountain section, the two-way test curve approximating method based on optical time domain reflectometer backscattering curve is described.
Spring and autumn, the pool was a important line in Anhui Province's power telecom network fiber cable network to the lightguide cable link of long queue mountain section, 167 kilometers of total lengths.Use the optical time domain reflectometer of common 45dB, can't finish test the whole piece lightguide cable link from an end.For this section lightguide cable link, we adopt and to measure respectively from two ends, obtain two backscattering curves, and then are a two-way test curve with two backscattering curve fits.
As shown in Figure 1, monitoring center is respectively to pool optical time domain reflection module and long queue pediment Time Domain Reflectometry module transmission test instruction in spring and autumn.After the optical time domain reflection module receives test instruction, start test, receive the basic data of backscattering curve, generate unidirectional backscattering curve file.And unidirectional backscattering curve file is back to monitoring center.
After monitoring center receives unidirectional backscattering curve file, enable the fitting algorithm of two-way test curve, the mode of match as shown in Figure 2.Detailed process is as follows:
1) relatively loss threshold value of incident is set, incident relatively reflects threshold value, optical cable segment length compare threshold
SetEvtCmpThd(FLOAT?fLossCmpThd，FLOAT?fReflCmpThd，FLOAT?fSpanCmpThd))
2) curve file that will merge is set, the curve file title of preceding two parameters for merging, latter two parameter are the positions that merges point.
SetCurveFile(LPCTSTR?filenamel，LPCTSTR?filename2，FLOAT?fposl，FLOAT?fpos2)
3) generate two-way test curve file, first parameter is the path of the two-way curve file of storage generation, and second parameter is the routing number of two-way test curve, and the 3rd parameter is the test assignment number.
GetMergerFile(m_sMerPath，m_iRoute，m_iTask)
The overall flow figure that shown in Figure 3 is based on the two-way test curve approximating method of optical time domain reflectometer backscattering curve.
In conjunction with the accompanying drawings the specific embodiment of the present invention is described above.It should be noted, the invention is not restricted to above-mentioned execution mode, under the premise of without departing from the spirit of the present invention, those skilled in the art can carry out multiple modifications and changes.
Claims (1)
1, a kind of method of measuring performance parameters of optical fiber cable circuit with ultra-long distance, it is characterized in that measuring simultaneously from the two ends of extra long distance lightguide cable link to be measured by optical time domain reflectometer, obtain two backscattering curves, and approximating method becomes a backscattering curve with two backscattering curve fits, backscattering curve after the match reacts the over-all properties situation of this section lightguide cable link, and this method may further comprise the steps:
(1) collection of unidirectional backscattering curve data;
(2) analyzing stored of unidirectional backscattering curve, comprise the basic data of collecting and putting test in order, the structure of definition test parameter, test data, event information, analysis result and warning information, the structure of the data based definition such as test parameter, test data, event information, analysis result and warning information of collecting is write test file in order, and generate unidirectional backscattering curve file;
(3) match of two-way test curve comprises the position of determining match point, and the position of described match point can be specified by user oneself, also can obtain, merge test parameter, merge test data by analyzing two test curve files, fusion event information, the convergence analysis result merges warning information;
(4) analyzing stored of two-way test curve, comprise the two-way test curve curve form of definition, test parameter, test data, event information, analysis result, the warning information of two-wire test curve form after will merging according to definition writes two-way test curve, generates two-way test curve file.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519707A (en) * | 2010-08-20 | 2012-06-27 | 株式会社藤仓 | Measuring method of longitudinal distribution of bending loss of optical fiber |
| CN102539113A (en) * | 2011-11-21 | 2012-07-04 | 河南省电力通信自动化公司 | BOTDA curve analysis method based on brillouin time domain analyzer |
| CN103973362A (en) * | 2013-02-06 | 2014-08-06 | 中兴通讯股份有限公司 | Method and device for setting OTDR (optical time domain reflectometer) test parameter set |
| CN105187120A (en) * | 2015-08-21 | 2015-12-23 | 桂林聚联科技有限公司 | Apparatus and method for monitoring extra long distance optical cables by using one monitoring wavelength |
| CN109061386A (en) * | 2018-08-20 | 2018-12-21 | 上海仁童电子科技有限公司 | A kind of cable detection method and device |
| CN110086528A (en) * | 2019-04-15 | 2019-08-02 | 北京盟力星科技有限公司 | A kind of resource management system based on optical cable on-line monitoring |
| CN110635840A (en) * | 2018-12-19 | 2019-12-31 | 国网湖北省电力有限公司检修公司 | Splicing method of bidirectional OTDR test curve |
| CN111490818A (en) * | 2020-04-10 | 2020-08-04 | 武汉光迅科技股份有限公司 | Long-distance optical fiber detection method, device, equipment, system and storage medium |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1265183C (en) * | 2004-01-09 | 2006-07-19 | 南京大学 | Optical cable circuit failure point precision locating method |
| CN100420929C (en) * | 2005-08-09 | 2008-09-24 | 中国电子科技集团公司第二十三研究所 | Automatic optical fiber monitoring method |
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2008
- 2008-12-17 CN CN 200810239781 patent/CN101447832B/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9562827B2 (en) | 2010-08-20 | 2017-02-07 | Fujikura Ltd. | Measuring method of longitudinal distribution of bending loss of optical fiber, measuring method of longitudinal distribution of actual bending loss value of optical fiber, test method of optical line, manufacturing method of optical fiber cable, manufacturing method of optical fiber cord, and manufacturing method of optical fiber |
| CN102519707A (en) * | 2010-08-20 | 2012-06-27 | 株式会社藤仓 | Measuring method of longitudinal distribution of bending loss of optical fiber |
| CN102519707B (en) * | 2010-08-20 | 2015-05-13 | 株式会社藤仓 | Measuring method of longitudinal distribution of bending loss of optical fiber |
| CN102539113A (en) * | 2011-11-21 | 2012-07-04 | 河南省电力通信自动化公司 | BOTDA curve analysis method based on brillouin time domain analyzer |
| CN102539113B (en) * | 2011-11-21 | 2015-11-04 | 河南省电力通信自动化公司 | A kind of tracing analysis method based on Brillouin optical time domain analysis instrument BOTDA |
| WO2014121602A1 (en) * | 2013-02-06 | 2014-08-14 | 中兴通讯股份有限公司 | Method and device for setting otdr test parameter set |
| GB2526216A (en) * | 2013-02-06 | 2015-11-18 | Zte Corp | Method and device for setting OTDR test parameter set |
| CN103973362A (en) * | 2013-02-06 | 2014-08-06 | 中兴通讯股份有限公司 | Method and device for setting OTDR (optical time domain reflectometer) test parameter set |
| RU2628767C2 (en) * | 2013-02-06 | 2017-08-22 | ЗетТиИ Корпорейшн | Method and device to configure testing parameters set by using the optic time domain reflectometer (otdr) |
| US9973271B2 (en) | 2013-02-06 | 2018-05-15 | Zte Corporation | Method and device for configuring OTDR test parameter set |
| CN105187120A (en) * | 2015-08-21 | 2015-12-23 | 桂林聚联科技有限公司 | Apparatus and method for monitoring extra long distance optical cables by using one monitoring wavelength |
| CN109061386A (en) * | 2018-08-20 | 2018-12-21 | 上海仁童电子科技有限公司 | A kind of cable detection method and device |
| CN110635840A (en) * | 2018-12-19 | 2019-12-31 | 国网湖北省电力有限公司检修公司 | Splicing method of bidirectional OTDR test curve |
| CN110635840B (en) * | 2018-12-19 | 2022-09-27 | 国网湖北省电力有限公司超高压公司 | Splicing method of bidirectional OTDR test curve |
| CN110086528A (en) * | 2019-04-15 | 2019-08-02 | 北京盟力星科技有限公司 | A kind of resource management system based on optical cable on-line monitoring |
| CN111490818A (en) * | 2020-04-10 | 2020-08-04 | 武汉光迅科技股份有限公司 | Long-distance optical fiber detection method, device, equipment, system and storage medium |
| WO2021203751A1 (en) * | 2020-04-10 | 2021-10-14 | 武汉光迅科技股份有限公司 | Long-distance optical fiber measurement method, apparatus, device and system, and storage medium |
| CN111490818B (en) * | 2020-04-10 | 2022-03-11 | 武汉光迅科技股份有限公司 | Long-distance optical fiber detection method, device, equipment, system and storage medium |
| US11901937B2 (en) | 2020-04-10 | 2024-02-13 | Accelink Technologies Co., Ltd. | Long-distance optical fiber detecting method, apparatus, device and system, and storage medium |
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| CN101447832B (en) | 2012-05-23 |
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