CN105823431A - Optical fiber over-bending detection method - Google Patents
Optical fiber over-bending detection method Download PDFInfo
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- CN105823431A CN105823431A CN201610186019.9A CN201610186019A CN105823431A CN 105823431 A CN105823431 A CN 105823431A CN 201610186019 A CN201610186019 A CN 201610186019A CN 105823431 A CN105823431 A CN 105823431A
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- optical fiber
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- General Physics & Mathematics (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The present invention discloses an optical fiber over-bending detection method. The method comprises the following steps: starting an optical frequency reflector, and connecting an optical fiber to be detected; starting an OFDR test system and setting measurement parameters, the test of the optical fiber to be detected and the data records; and performing a bending test at the position of the optical fiber with 0.12m, and only changing the bending degree of the optical fiber. Through the OFDR technology and the detection steps, the optical fiber over-bending detection method realizes the optical fiber over-bending detection, the OFDR is taken as the backward reflection measurement technology based on the frequency domain analysis, the defects of the distance resolution of an OTDR and the measurement distance of an OLCR are overcome according to the principles, and the optical fiber over-bending detection result is obtained according the steps, so that the fraction positions are effectively and accurately determined and the fault reasons are analyzed.
Description
Technical field
The present invention relates to the detection method of a kind of excessive fiber bending, particularly relate to the detection method that a kind of excessive fiber easy to use, that Detection results is good bends.
Background technology
After nineteen ninety-five Boeing 777 the most successfully uses fiber optic local area network (LAN) technology, just propose the concept of " aviation electronics optical fiber Unified Network ", started the upsurge of aviation electronics fiber optic network technical research.Build internal communication network based on optical fiber technology, become the development trend of this kind of dedicated communications network, also open novel application for Fibre Optical Communication Technology.But, the monitoring reliability of this kind of network is a problem that could not solve very well.
Being different from traditional communication network, this kind of network is often concerning life or even the national security of people, and reliability and security requirement to network are high, it is necessary to carry out the most careful detection；Network work bad environments, variations in temperature is big, and vibratory impulse is serious, and wiring complexity, fault is easily sent out, and needs to carry out periodic inspection or on-line monitoring；The link range of network is short, and structure is complicated, optical device number is many, it is desirable to fault is pin-pointed to the inside of device.Therefore, can reach submillimeter magnitude in the urgent need to positioning precision, distance range can arrive the optical fiber link monitoring device of several kilometers, optical time domain reflection technology (OTDR) obviously can not meet above-mentioned measurement requirement, therefore studies a kind of detection method that can accurately monitor necessary.
Summary of the invention
The technical problem to be solved is to provide the detection method of a kind of excessive fiber bending, have easy to use, Detection results good feature.
For solving above-mentioned technical problem, the technical scheme is that the detection method that a kind of excessive fiber bends, its innovative point is to comprise the following steps,
Step a: starting probe beam deflation instrument and connect testing fiber, switch on power startup by the OFDR system of probe beam deflation instrument, then by the seam of intelligent acess OFDR system to be detected；
Step b: start OFDR test system and measurement parameter is set, monitoring pattern being set as single-mode fiber pattern, the measuring distance of optical fiber is set as 5m；
Step c: the test of optical fiber to be detected and data record, under optical fiber naturalness, tests with light frequency domain reflectometer and records power curve and the end reflection point of optical fiber the most to be detected；
Step d: to being curved test at this optical fiber 0.12m, uses probe beam deflation instrument again to test and record optical fiber to be detected power curve now and end reflection point；
Step e: only change the degree of crook of optical fiber, repeats step d, and uses probe beam deflation instrument again to test and record optical fiber to be detected power curve now and end reflection point.
Preferably, the detection method of described excessive fiber bending is for fiber optic network, fiber plant detection in optical fiber winding process.
Preferably, the one during described fiber plant is fibre optic hydrophone, optical fibre gyro.
Preferably, described probe beam deflation instrument exports one group of full curve, described full curve flies up the numerical value that corresponding peak point show and is at corresponding detection fiber fracture position.
It is an advantage of the current invention that: the present invention achieves excessive fiber curved detection by OFDR technology and above-mentioned detecting step, OFDR measures technology as a kind of retroreflection based on frequency-domain analysis, OTDR is overcome at range resolution ratio and OLCR in the deficiency measured in distance from principle, can get the testing result of excessive fiber bending according to above-mentioned steps, thus effectively judge fracture position analyzing failure cause accurately.
Detailed description of the invention
The detection method of the excessive fiber bending of the present invention comprises the following steps, step a: starting probe beam deflation instrument and connect testing fiber, switch on power startup by the OFDR system of probe beam deflation instrument, then by the seam of intelligent acess OFDR system to be detected；Step b: start OFDR test system and measurement parameter is set, monitoring pattern being set as single-mode fiber pattern, the measuring distance of optical fiber is set as 5m；Step c: the test of optical fiber to be detected and data record, under optical fiber naturalness, tests with light frequency domain reflectometer and records power curve and the end reflection point of optical fiber the most to be detected；Step d: to being curved test at this optical fiber 0.12m, uses probe beam deflation instrument again to test and record optical fiber to be detected power curve now and end reflection point；Step e: only change the degree of crook of optical fiber, repeats step d, and uses probe beam deflation instrument again to test and record optical fiber to be detected power curve now and end reflection point.Excessive fiber curved detection is achieved by OFDR technology and above-mentioned detecting step, OFDR measures technology as a kind of retroreflection based on frequency-domain analysis, OTDR is overcome at range resolution ratio and OLCR in the deficiency measured in distance from principle, can get the testing result of excessive fiber bending according to above-mentioned steps, thus effectively judge fracture position analyzing failure cause accurately.
The detection method of above-mentioned excessive fiber bending is for fiber optic network, fiber plant detection in optical fiber winding process, and fiber plant is the one in fibre optic hydrophone, optical fibre gyro.Probe beam deflation instrument exports one group of full curve, described full curve flies up the numerical value that corresponding peak point show and is at corresponding detection fiber fracture position.
Finally it should be noted that, above example is only in order to illustrate technical scheme and non-limiting technical scheme, it will be understood by those within the art that, technical scheme is modified or equivalent by those, without deviating from objective and the scope of the technical program, all should contain in the middle of scope of the presently claimed invention.
Claims (4)
1. the detection method of an excessive fiber bending, it is characterised in that comprise the following steps:
Step a: starting probe beam deflation instrument and connect testing fiber, switch on power startup by the OFDR system of probe beam deflation instrument, then by the seam of intelligent acess OFDR system to be detected；
Step b: start OFDR test system and measurement parameter is set, monitoring pattern being set as single-mode fiber pattern, the measuring distance of optical fiber is set as 5m；
Step c: the test of optical fiber to be detected and data record, under optical fiber naturalness, tests with light frequency domain reflectometer and records power curve and the end reflection point of optical fiber the most to be detected；
Step d: to being curved test at this optical fiber 0.12m, uses probe beam deflation instrument again to test and record optical fiber to be detected power curve now and end reflection point；
Step e: only change the degree of crook of optical fiber, repeats step d, and uses probe beam deflation instrument again to test and record optical fiber to be detected power curve now and end reflection point.
The detection method of a kind of excessive fiber the most as claimed in claim 1 bending, it is characterised in that: the detection method of described excessive fiber bending is for fiber optic network, fiber plant detection in optical fiber winding process.
The detection method of a kind of excessive fiber the most as claimed in claim 2 bending, it is characterised in that: described fiber plant is the one in fibre optic hydrophone, optical fibre gyro.
The detection method of a kind of excessive fiber the most as claimed in claim 1 bending, it is characterized in that: described probe beam deflation instrument exports one group of full curve, described full curve flies up the numerical value that corresponding peak point show and is at corresponding detection fiber fracture position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610186019.9A CN105823431A (en) | 2016-03-25 | 2016-03-25 | Optical fiber over-bending detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610186019.9A CN105823431A (en) | 2016-03-25 | 2016-03-25 | Optical fiber over-bending detection method |
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| CN105823431A true CN105823431A (en) | 2016-08-03 |
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| CN201610186019.9A Pending CN105823431A (en) | 2016-03-25 | 2016-03-25 | Optical fiber over-bending detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109187194A (en) * | 2018-10-26 | 2019-01-11 | 南京大学 | A kind of soil body tensioning mechanical characteristic fiber-optic monitoring based on OFDR and test method and device |
| CN110954297A (en) * | 2019-12-13 | 2020-04-03 | 江苏骏龙光电科技股份有限公司 | Technology for detecting excessive bending of optical fiber |
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| CN105306137A (en) * | 2014-06-27 | 2016-02-03 | 中兴通讯股份有限公司 | Optical fiber detection method, optical fiber detection device, optical fiber detection platform and network element management system |
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2016
- 2016-03-25 CN CN201610186019.9A patent/CN105823431A/en active Pending
Patent Citations (5)
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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 |
| JP2011158330A (en) * | 2010-01-29 | 2011-08-18 | Nippon Telegr & Teleph Corp <Ntt> | Apparatus and method for measurement of optical path |
| CN203733354U (en) * | 2014-01-21 | 2014-07-23 | 广东交通职业技术学院 | Fiber fault detection teaching device |
| CN105306137A (en) * | 2014-06-27 | 2016-02-03 | 中兴通讯股份有限公司 | Optical fiber detection method, optical fiber detection device, optical fiber detection platform and network element management system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109187194A (en) * | 2018-10-26 | 2019-01-11 | 南京大学 | A kind of soil body tensioning mechanical characteristic fiber-optic monitoring based on OFDR and test method and device |
| CN109187194B (en) * | 2018-10-26 | 2023-10-13 | 南京大学 | OFDR-based soil body tension mechanical property optical fiber monitoring and testing method and device |
| CN110954297A (en) * | 2019-12-13 | 2020-04-03 | 江苏骏龙光电科技股份有限公司 | Technology for detecting excessive bending of optical fiber |
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Application publication date: 20160803 |