CN102088315A - Optical fiber failure positioning system and method - Google Patents

Optical fiber failure positioning system and method Download PDF

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Publication number
CN102088315A
CN102088315A CN2011100669604A CN201110066960A CN102088315A CN 102088315 A CN102088315 A CN 102088315A CN 2011100669604 A CN2011100669604 A CN 2011100669604A CN 201110066960 A CN201110066960 A CN 201110066960A CN 102088315 A CN102088315 A CN 102088315A
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test light
fiber
dynamic range
power loss
optical fiber
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CN2011100669604A
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CN102088315B (en
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付勇
王伟
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BEIJING STAMINA TECHNOLOGY Co Ltd
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BEIJING STAMINA TECHNOLOGY Co Ltd
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Abstract

The invention relates to an optical fiber failure positioning system and method. The optical fiber failure positioning method comprises the following steps of: sending out testing light at preset pulse width and pulse time interval to be transmitted in an optical fiber to be detected; detecting the power loss of the testing light; initially determining the failure position of the optical fiber according to the power loss of the testing light; determining a dynamic range of the testing light according to the power loss of the testing light; estimating a dynamic range of secondary testing light required when the optical fiber to be detected is monitored for the second time according to the initially determined failure position of the optical fiber; re-determining the pulse width and the pulse time interval according to the relationship among the dynamic range of the testing light, the pulse width and the pulse time interval; sending out secondary testing light at the re-determined pulse width and the pulse time interval to be transmitted in the optical fiber to be detected; detecting the power loss of the secondary testing light; and positioning the secondary failure for the optical fiber to be detected according to the power loss of the secondary testing light. By adopting the system and the method, the accuracy of optical fiber failure positioning can be improved.

Description

Fiber failure navigation system and method
Technical field
The application relates to a kind of fault location system, relates in particular to a kind of fiber failure navigation system and method.
Background technology
In recent years, Fibre Optical Communication Technology has obtained greatly developing, and optical fiber communication has not only realized remote transmission signal, and the stable performance of transmission signals.In the fiber-optic monitoring technology, by placing light source to send test light at client's far-end, test light is propagated the back by OTDR (Optical Time Domain Reflectometer in the optical fiber of tested client, optical time domain reflectometer) receives, because light is propagated in optical fiber can be because decay appears in scattering, whether OTDR just can analyze tested optical fiber by the power attenuation situation of analytical test light and occur unusually, range according to test light, parameters such as pulsewidth determine that unusual position appears in optical fiber, though this mode has proposed solution for the fiber failure location, yet positioning accuracy is not enough, also needs the maintainer to spend plenty of time further investigation fault point after the location.
Summary of the invention
Provide hereinafter about brief overview of the present invention, so that basic comprehension about some aspect of the present invention is provided.Should be appreciated that this general introduction is not about exhaustive general introduction of the present invention.It is not that intention is determined key of the present invention or pith, neither be intended to limit scope of the present invention.Its purpose only is to provide some notion with the form of simplifying, with this as the preorder in greater detail of argumentation after a while.
The fiber failure navigation system and the method that provide a kind of fault location precision high is provided a main purpose of the present invention.
According to an aspect of the present invention, a kind of fiber failure navigation system comprises:
Optical transmitting set is used for sending first test light to transmit at testing fiber with predetermined pulse width and pulse interval to testing fiber;
The luminous power detector is used for being received in the test light first after testing fiber transmits and detects the power loss of test light first;
The fault location module is used for the abort situation according to the tentatively definite optical fiber of power loss of described test light first;
The dynamic range detection module is used for determining the dynamic range of test light first according to the power loss of described test light first;
Dynamic range is estimated module, is used for estimating the dynamic range of testing fiber being carried out the second test light of secondary monitoring according to the abort situation of preliminary definite optical fiber; And
The parameter reset module, the relation that is used between dynamic range, pulse duration and the pulse interval according to test light redefines pulse duration and pulse interval, make described optical transmitting set send described second test light and in testing fiber, transmit with the pulse duration that redefines and pulse interval, described luminous power detector detects the power loss of the second test light after the transmission in testing fiber, and described fault location module is carried out the secondary failure location according to the power loss of described second test light to testing fiber.
According to an aspect of the present invention, a kind of fiber failure localization method comprises:
Send first test light in testing fiber, to transmit with predetermined pulse width and pulse interval to testing fiber;
Be received in the test light first after transmitting in the testing fiber and detect the power loss of test light first;
Tentatively determine the abort situation of optical fiber according to the power loss of described test light first;
Determine the dynamic range of described test light first according to the power loss of described test light first;
Estimate the dynamic range of second test light required when testing fiber carried out the secondary monitoring according to the abort situation of the preliminary optical fiber of determining;
Redefine pulse duration and pulse interval according to the relation between dynamic range, pulse duration and the pulse interval of test light;
Send second test light in testing fiber, to transmit, testing fiber is carried out the secondary monitoring with pulse duration and the pulse interval that redefines;
The power loss of the second test light after detection is transmitted in testing fiber; And
Power loss according to second test light is carried out the secondary failure location to testing fiber.
Fiber failure navigation system of the present invention and method are carried out the secondary monitoring to reach the purpose of secondary failure location to testing fiber, by estimating the dynamic range of second test light, the pulse duration and the time interval of the pulse signal of test light all dwindle during the secondary monitoring that obtains according to the relation between test light dynamic range and its pulse pulse duration and the pulse interval, pulse duration is more little, energy is more little, resolution is high more, the monitoring blind area that is produced is also more little, pulse interval is more little, the error that produces is also more little, therefore, testing fiber is carried out the secondary monitoring reduced monitoring blind area and error, improved the precision of fault location.
Description of drawings
With reference to below in conjunction with the explanation of accompanying drawing, can understand above and other purpose of the present invention, characteristics and advantage more easily to the embodiment of the invention.Parts in the accompanying drawing are just in order to illustrate principle of the present invention.In the accompanying drawings, same or similar technical characterictic or parts will adopt identical or similar Reference numeral to represent.
Fig. 1 is the block diagram of fiber failure navigation system better embodiment of the present invention.
Fig. 2 A and Fig. 2 B are the curve of the power loss after test light is transmitted in testing fiber.
Fig. 3 is the flow chart of fiber failure localization method better embodiment of the present invention.
Embodiment
Embodiments of the invention are described with reference to the accompanying drawings.Element of describing in an accompanying drawing of the present invention or a kind of execution mode and feature can combine with element and the feature shown in one or more other accompanying drawing or the execution mode.Should be noted that for purpose clearly, omitted the parts that have nothing to do with the present invention, those of ordinary skills are known and the expression and the description of processing in accompanying drawing and the explanation.
Please refer to Fig. 1, the better embodiment of fiber failure navigation system of the present invention comprises that optical transmitting set 10, luminous power detector 20, fault location module 30, dynamic range detection module 40, dynamic range estimate module 50 and parameter reset module 60.
Optical transmitting set 10 be used for to testing fiber launch first test light with in the testing fiber transmission so that testing fiber is tentatively monitored, test light is the light pulse signal with predetermined pulse width and pulse interval of fixed qty first, and optical transmitting set 10 sends test light first with this predetermined pulse width and pulse interval to testing fiber.
Luminous power detector 20 is used for being received in the test light first after testing fiber transmits and detects the power loss of test light first.
Fault location module 30 is used for the basis abort situation of the tentatively definite optical fiber of power loss of test light first, please refer to Fig. 2 A and 2B, generally, light propagation meeting in optical fiber power loss occurs owing to scattering, when fracture appears in the optical fiber position, welding point etc. can cause when signal transmits discontinuous phenomenon, angle and curved or the anomalies such as spike shown in Fig. 2 B shown in Fig. 2 A can appear in the curve of catoptrical power loss, and fault location module 30 is determined the pairing abort situation of optical fiber by observing the power loss curve of test light first and judge whether optical fiber breaks down and unusual position occurring according to the curve of power loss.
Dynamic range detection module 40 is used for determining the dynamic range of test light first, dynamic range detection module 40 is basis definite dynamic ranges of test light first of curve of the power loss of test light first, for example, in Fig. 2 A, the dynamic range of test light is the poor of maximum power value A1 and minimal power values A2 first.
Because the dynamic range of test light is big more, the range during test light monitoring testing fiber is also big more, and the positioning accuracy of abort situation is also low more, and in order to improve positioning accuracy, fiber failure navigation system of the present invention is carried out the secondary location to abort situation.Dynamic range is estimated module 50 and is redefined the secondary monitoring distance of testing fiber being carried out the secondary monitoring according to the abort situation of fault location module 30 determined optical fiber, and estimate the dynamic range of required second test light of secondary when location according to the secondary monitoring distance, above-mentioned secondary monitoring distance can be the product of fault location module 30 determined abort situation and coefficient when monitoring for the first time, as, abort situation multiply by 1.2, the range of test light when the secondary monitoring distance was monitored less than the first time, the monitoring distance when promptly monitoring less than the first time.
Owing to have following relation between the dynamic range of test light, pulse duration, the pulse interval: unit of the every minimizing of the dynamic range of test light, pulse interval dwindles 4 times, and promptly the number of pulses of being sent in the unit interval enlarges 4 times; Unit of the every minimizing of the dynamic range of test light, its pulse duration is dwindled 2 times, and the dynamic range of a unit can be theoretical 1.5dB, also can be the actual value of obtaining by experiment.1.5dB is illustrated with theoretical value, and as the dynamic range minimizing 4.5dB of test light, when promptly reducing by 3 units, pulse interval dwindles 4 3Doubly, pulse duration dwindles 2 3Doubly.
Parameter reset module 60 redefines pulse duration and pulse interval according to the above-mentioned relation between dynamic range, pulse duration and the pulse interval of test light.
The pulse duration that optical transmitting set 10 redefines with parameter reset module 60 and pulse interval sends second test light and in testing fiber transmission testing fiber is carried out the secondary monitoring, luminous power detector 20 detects the power loss of second test light, fault location module 30 is carried out the secondary failure location to upgrade fault alarm information, convenient follow-up maintenance to testing fiber according to the power loss of second test light to testing fiber.
Please refer to Fig. 3, the better embodiment of fiber failure localization method of the present invention may further comprise the steps:
Step S1: optical transmitting set 10 sends first test light to transmit, so that testing fiber is tentatively monitored with predetermined pulse width and pulse interval to testing fiber in testing fiber.
Step S2: luminous power detector 20 is received in the test light first after transmitting in the testing fiber and detects the power loss of test light first.
Step S3: fault location module 30 bases are the abort situation of the tentatively definite optical fiber of power loss of test light first, and in this step, fault location module 30 is by observing the abort situation of the tentatively definite optical fiber of curve of the power loss of test light first.
Step S4: the dynamic range detection module 40 bases power loss of test light are first determined the dynamic range of test light first, in this step, dynamic range detection module 40 is dynamic ranges of determining test light first by the curve of observing the power loss of test light first.
Step S5: dynamic range is estimated module 50 and is redefined the secondary monitoring distance of testing fiber being carried out the secondary monitoring according to the abort situation of the preliminary optical fiber of determining of fault location module 30, and estimate the dynamic range of required second test light of secondary when monitoring according to the secondary monitoring distance, the range of above-mentioned secondary monitoring distance when testing fiber is tentatively monitored is promptly less than the monitoring distance of preliminary monitoring.
Step S6: parameter reset module 60 redefines pulse duration and pulse interval according to the relation between dynamic range, pulse duration and the pulse interval of test light.
Step S7: optical transmitting set 10 sends second test light to transmit, testing fiber is carried out the secondary monitoring with pulse duration and the pulse interval that redefines among the step S6 in testing fiber.
Step S8: luminous power detector 20 is received in the second test light after transmitting in the testing fiber and detects the power loss of second test light.
Step S9: fault location module 30 is carried out the secondary failure location according to the power loss of two test light to testing fiber.
Because secondary monitoring distance range of test light first when monitoring for the first time, the dynamic range of two test light of secondary monitoring also diminishes, the pulse duration and the pulse interval of the second test light that obtains according to the pulse duration of test light dynamic range and its pulse signal and the above-mentioned relation between the time interval all dwindle, the pulse duration of pulse signal is more little, energy is more little, resolution is high more, the monitoring blind area that is produced is also more little, the time interval of pulse signal is more little, the error that produces is also more little, therefore, testing fiber is carried out the secondary monitoring reduced monitoring blind area and error, improved the precision of fault location.Fiber failure navigation system of the present invention and method can be applicable among the OTDR.
In equipment of the present invention and method, obviously, after can decomposing, make up and/or decompose, each parts or each step reconfigure.These decomposition and/or reconfigure and to be considered as equivalents of the present invention.The step that also it is pointed out that the above-mentioned series of processes of execution can order following the instructions naturally be carried out in chronological order, but does not need necessarily to carry out according to time sequencing.Some step can walk abreast or carry out independently of one another.Simultaneously, in the above in the description to the specific embodiment of the invention, can in one or more other execution mode, use in identical or similar mode at the feature that a kind of execution mode is described and/or illustrated, combined with the feature in other execution mode, or the feature in alternative other execution mode.

Claims (10)

1. fiber failure navigation system comprises:
Optical transmitting set is used for sending first test light to transmit at testing fiber with predetermined pulse width and pulse interval to testing fiber;
The luminous power detector is used for being received in the test light first after testing fiber transmits and detects the power loss of test light first;
The fault location module is used for the abort situation according to the tentatively definite optical fiber of power loss of described test light first;
The dynamic range detection module is used for determining the dynamic range of test light first according to the power loss of described test light first;
Dynamic range is estimated module, is used for estimating the dynamic range of testing fiber being carried out the second test light of secondary monitoring according to the abort situation of preliminary definite optical fiber; And
The parameter reset module, the relation that is used between dynamic range, pulse duration and the pulse interval according to test light redefines pulse duration and pulse interval, make described optical transmitting set send described second test light and in testing fiber, transmit with the pulse duration that redefines and pulse interval, described luminous power detector detects the power loss of the second test light after the transmission in testing fiber, and described fault location module is carried out the secondary failure location according to the power loss of described second test light to testing fiber.
2. fiber failure navigation system as claimed in claim 1, it is characterized in that, the abort situation that described dynamic range is estimated the optical fiber that module tentatively determines according to the fault location module redefines the secondary monitoring distance of testing fiber being carried out the secondary monitoring, and estimates the dynamic range of described second test light according to described secondary monitoring distance.
3. fiber failure navigation system as claimed in claim 2, it is characterized in that, described secondary monitoring distance is the abort situation of the preliminary optical fiber of determining of described fault location module and the product of a coefficient, and described secondary monitoring distance is less than the range of described test light first.
4. fiber failure navigation system as claimed in claim 1, it is characterized in that, described fault location module is according to the abort situation of the tentatively definite optical fiber of curve of the power loss of described test light first, and described dynamic range detection module is determined the dynamic range of test light first according to the curve of the power loss of described test light first.
5. fiber failure navigation system as claimed in claim 1, it is characterized in that, pass between the dynamic range of described test light, pulse duration and the pulse interval is: unit of the every minimizing of the dynamic range of test light, pulse interval dwindles 4 times, pulse duration is dwindled 2 times, and the dynamic range of a described unit is 1.5dB.
6. fiber failure localization method comprises:
Send first test light in testing fiber, to transmit with predetermined pulse width and pulse interval to testing fiber;
Be received in the test light first after transmitting in the testing fiber and detect the power loss of test light first;
Tentatively determine the abort situation of optical fiber according to the power loss of described test light first;
Determine the dynamic range of described test light first according to the power loss of described test light first;
Estimate the dynamic range of second test light required when testing fiber carried out the secondary monitoring according to the abort situation of the preliminary optical fiber of determining;
Redefine pulse duration and pulse interval according to the relation between dynamic range, pulse duration and the pulse interval of test light;
Send second test light in testing fiber, to transmit, testing fiber is carried out the secondary monitoring with pulse duration and the pulse interval that redefines;
The power loss of the second test light after detection is transmitted in testing fiber; And
Power loss according to second test light is carried out the secondary failure location to testing fiber.
7. fiber failure localization method as claimed in claim 6, it is characterized in that, the described step that testing fiber is carried out the dynamic range of required second test light of secondary when monitoring of estimating comprises: the abort situation according to the described preliminary optical fiber of determining redefines the secondary monitoring distance of testing fiber being carried out the secondary monitoring, and estimates the dynamic range of described second test light according to described secondary monitoring distance.
8. fiber failure localization method as claimed in claim 7, it is characterized in that the described step that testing fiber is carried out the secondary monitoring distance of secondary monitoring that redefines comprises that the abort situation of the optical fiber that will tentatively determine and a multiplication are to obtain described secondary monitoring distance.
9. fiber failure localization method as claimed in claim 6, it is characterized in that, the step of the abort situation of described preliminary definite optical fiber comprises the abort situation of tentatively determining optical fiber according to the curve of the power loss of described test light first, and the step of the dynamic range of described definite described test light first comprises according to the curve of the power loss of described test light first determines the dynamic range of test light first.
10. fiber failure localization method as claimed in claim 6, it is characterized in that, pass between the dynamic range of described test light, pulse duration and the pulse interval is: unit of the every minimizing of the dynamic range of test light, pulse interval dwindles 4 times, pulse duration is dwindled 2 times, and the dynamic range of a described unit is 1.5dB.
CN201110066960.4A 2011-03-18 2011-03-18 Optical fiber failure positioning system and method Expired - Fee Related CN102088315B (en)

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Cited By (13)

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CN102820920A (en) * 2012-08-20 2012-12-12 慈溪市供电局 Fault point localizing method and device
CN104125010A (en) * 2013-04-25 2014-10-29 中国移动通信集团河北有限公司 Optical cable fault location method and device thereof
CN104215427A (en) * 2014-10-09 2014-12-17 南京韦纳迪科技有限公司 OTDR (optical time domain reflectometry)-based device and method allowing dead zone-free optical fiber monitoring and positioning
CN104333417A (en) * 2014-09-23 2015-02-04 国网安徽省电力公司阜阳供电公司 Electric power communication optical cable fault positioning technology
CN104485992A (en) * 2014-11-06 2015-04-01 北京富通亚讯网络信息技术有限公司 Large-dynamic no-blind zone monitoring system and method
CN105490742A (en) * 2015-12-28 2016-04-13 上海电信工程有限公司 Optical fiber link detection method, communication optical path tester and system
CN108229553A (en) * 2017-12-29 2018-06-29 国网吉林省电力有限公司信息通信公司 A kind of OTDR curve datas analysis method
CN108462531A (en) * 2018-03-30 2018-08-28 北京奥普维尔科技有限公司 Optical time domain reflectometer and its method, more pulsewidth optical cable diagnostic systems and its method
CN109471119A (en) * 2018-09-30 2019-03-15 维沃移动通信有限公司 A kind of method and terminal device controlling power consumption
CN109506895A (en) * 2018-11-09 2019-03-22 武汉新运维光电科技股份有限公司 A kind of optical cable status real time monitor and abnormal point positioning system
CN110545140A (en) * 2019-09-04 2019-12-06 成都雄博科技发展有限公司 Optical cable fault point approaching positioning method
CN110611530A (en) * 2019-09-03 2019-12-24 珠海格力电器股份有限公司 Optical fiber fault determination method and device and photovoltaic centrifuge equipment
CN110808777A (en) * 2019-11-15 2020-02-18 四川中电启明星信息技术有限公司 Fault management and control system and method for optical fiber communication network

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CN101232328A (en) * 2007-01-26 2008-07-30 华为技术有限公司 Method for locating case point of branch optical fiber, optical network and network appliance
CN101958749A (en) * 2010-07-24 2011-01-26 桂林光通电子工程公司 On-line optical cable monitoring method

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CN101232328A (en) * 2007-01-26 2008-07-30 华为技术有限公司 Method for locating case point of branch optical fiber, optical network and network appliance
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102820920A (en) * 2012-08-20 2012-12-12 慈溪市供电局 Fault point localizing method and device
CN104125010A (en) * 2013-04-25 2014-10-29 中国移动通信集团河北有限公司 Optical cable fault location method and device thereof
CN104125010B (en) * 2013-04-25 2016-12-28 中国移动通信集团河北有限公司 A kind of method and device of Cable's Fault location
CN104333417A (en) * 2014-09-23 2015-02-04 国网安徽省电力公司阜阳供电公司 Electric power communication optical cable fault positioning technology
CN104215427A (en) * 2014-10-09 2014-12-17 南京韦纳迪科技有限公司 OTDR (optical time domain reflectometry)-based device and method allowing dead zone-free optical fiber monitoring and positioning
CN104485992A (en) * 2014-11-06 2015-04-01 北京富通亚讯网络信息技术有限公司 Large-dynamic no-blind zone monitoring system and method
CN105490742A (en) * 2015-12-28 2016-04-13 上海电信工程有限公司 Optical fiber link detection method, communication optical path tester and system
CN108229553A (en) * 2017-12-29 2018-06-29 国网吉林省电力有限公司信息通信公司 A kind of OTDR curve datas analysis method
CN108462531A (en) * 2018-03-30 2018-08-28 北京奥普维尔科技有限公司 Optical time domain reflectometer and its method, more pulsewidth optical cable diagnostic systems and its method
CN109471119A (en) * 2018-09-30 2019-03-15 维沃移动通信有限公司 A kind of method and terminal device controlling power consumption
CN109506895A (en) * 2018-11-09 2019-03-22 武汉新运维光电科技股份有限公司 A kind of optical cable status real time monitor and abnormal point positioning system
CN110611530A (en) * 2019-09-03 2019-12-24 珠海格力电器股份有限公司 Optical fiber fault determination method and device and photovoltaic centrifuge equipment
CN110545140A (en) * 2019-09-04 2019-12-06 成都雄博科技发展有限公司 Optical cable fault point approaching positioning method
CN110808777A (en) * 2019-11-15 2020-02-18 四川中电启明星信息技术有限公司 Fault management and control system and method for optical fiber communication network

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