CN110954297A - Technology for detecting excessive bending of optical fiber - Google Patents
Technology for detecting excessive bending of optical fiber Download PDFInfo
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- CN110954297A CN110954297A CN201911281430.4A CN201911281430A CN110954297A CN 110954297 A CN110954297 A CN 110954297A CN 201911281430 A CN201911281430 A CN 201911281430A CN 110954297 A CN110954297 A CN 110954297A
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- Prior art keywords
- optical fiber
- bending
- recording
- data
- optical
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
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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
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
Abstract
The invention relates to a technology for detecting excessive bending of an optical fiber, which comprises the following specific steps: the method comprises the following steps of initial test recording, initial bending test recording, secondary bending test recording and data comparison, wherein the initial test recording is carried out in the natural state of the optical fiber, the optical frequency domain reflectometer is used for testing and recording, at the moment, the power curve and the tail end reflection point of the optical fiber, the initial bending test recording is carried out at the position of 0.12m of the optical fiber for bending test, and the optical frequency domain reflectometer is used for testing and recording the power curve and the tail end reflection point of the optical fiber again. The technology for detecting the excessive bending of the optical fiber can obtain the bending degree of the optical fiber to a certain degree by comparing the measured data and curves of a plurality of groups of optical fibers under different bending degrees, can measure two reflection points, and realizes the detection of the excessive bending of the optical fiber through the OFDR technology.
Description
Technical Field
The invention relates to the technical field of optical fiber detection and manufacturing, in particular to a technology for detecting excessive bending of an optical fiber.
Background
OFDR as a frequency domain analysis-based back reflection measurement technology, overcomes the defects of OTDR in distance resolution and OLCR in measurement distance in principle, can realize the measurement of high distance resolution, high sensitivity and medium distance, and is mainly used for fault detection of a medium-short distance special optical fiber network, health monitoring of a large-scale component, analysis and monitoring of an optical fiber polarization state coupling process, and detection of optical fiber over-bending, belongs to an intelligent high-end equipment technology, and along with the expansion of an optical fiber application plane, a very important problem is generated therewith: how to effectively inspect equipment or systems based on fiber optic technology during routine maintenance and how to inspect for bending of optical fibers.
The existing technical result of optical fiber detection is not accurate and the efficiency is not high.
Disclosure of Invention
The invention aims to provide a technology for detecting excessive bending of an optical fiber, which aims to solve the problem that the application range of the optical fiber is enlarged, and an important problem is generated along with the enlargement of the application range of the optical fiber in the background technology: how to carry out effectual detection to equipment or system based on optical fiber technique in daily maintenance, how to detect the crooked of optic fibre, the technical result of current to optic fibre detection is inaccurate, the problem that efficiency is not high.
A technology for detecting excessive bending of an optical fiber comprises the following specific steps: preliminary test recording, preliminary bending test recording, secondary bending test recording and data comparison.
Preferably, the preliminary test is recorded in the natural state of the optical fiber, and the test is performed and recorded by using an optical frequency domain reflectometer, and at the time, the power curve and the end reflection point of the optical fiber are recorded.
Preferably, the preliminary bending test is recorded at 0.12m of the fiber for bending test, and the fiber is retested and recorded at this time for power curve and end reflection point using an optical frequency domain reflectometer.
Preferably, the re-bending test recording further comprises re-testing and recording the power curve and the end reflection point of the optical fiber at the time when the bending degree of the optical fiber is 1 by using an optical frequency domain reflectometer.
Preferably, the re-bending test recording further comprises re-testing and recording the power curve and the end reflection point of the optical fiber at the time when the bending degree of the optical fiber is 2 by using an optical frequency domain reflectometer.
Preferably, the re-bending test recording further comprises re-testing and recording the power curve and the end reflection point of the optical fiber at the time when the bending degree of the optical fiber is 3 by using an optical frequency domain reflectometer.
Preferably, the data comparison compares sets of data of the preliminary test record, the preliminary bending test record, the secondary bending test record and the data comparison record.
Preferably, the data comparison inputs multiple groups of data of the initial test record, the initial bending test record, the secondary bending test record and the data comparison record into a computer, and the computer analyzes the multiple groups of data and automatically generates a comparison table through the processing of a Central Processing Unit (CPU).
Compared with the prior art, the invention has the following beneficial effects: this detection technology of optic fibre overbending, contrast multiunit optic fibre under different bending degree, the data and the curve of surveying, can obtain optic fibre crooked to a certain extent, can measure two reflection points, through the OFDR technique, optic fibre overbending's detection has been realized, data contrast will tentatively test the record, tentatively crooked test record, the multiunit data input of crooked test record once more and data contrast record to the computer, the computer analyzes multiunit data, handle the automatic generation contrast form through central processing unit CPU, make things convenient for the contrastive analysis of whole data, the practicality is stronger.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A technology for detecting excessive bending of an optical fiber comprises the following specific steps: the method comprises the steps of initial test recording, initial bending test recording, secondary bending test recording and data comparison, wherein the initial test recording is carried out in the natural state of the optical fiber, the optical frequency domain reflectometer is used for testing and recording, the power curve and the tail end reflection point of the optical fiber at the moment are recorded in the initial bending test recording at the position of 0.12m of the optical fiber, the optical frequency domain reflectometer is used for testing and recording the power curve and the tail end reflection point of the optical fiber at the moment, the secondary bending test recording further comprises the steps of testing again and recording the power curve and the tail end reflection point of the optical fiber at the moment by using the optical frequency domain reflectometer when the bending degree of the optical fiber is 1, the secondary bending test recording further comprises the steps of testing again and recording the power curve and the tail end reflection point of the optical fiber at the moment by using the optical frequency domain reflectometer when the bending degree of the optical fiber is 2, the secondary bending test recording further comprises the steps of testing again, data comparison will be preliminary test record, preliminary bending test record, the multiunit data of secondary bending test record and data contrast record contrast, contrast multiunit optic fibre under different bending degree, data and curve that survey, can obtain the optic fibre and bend to a certain extent, can measure two reflection points, through OFDR technique, the detection of optic fibre overbending has been realized, data contrast will be preliminary test record, preliminary bending test record, the multiunit data input of secondary bending test record and data contrast record to the computer, the computer analyzes multiunit data, handle automatic generation contrast table through central processing unit CPU.
Analyzing the test result of the single-mode optical fiber:
in the natural state of the optical fiber, the test result shows that only one reflection point is arranged, and the position of the reflection point is 0.184 m.
When the bending degree of the optical fiber is 1, only one reflection point is provided according to the results of multiple tests, and the position of the reflection point is 0.184 m.
When the bending degree of the optical fiber is 2, only one reflection point is obtained according to the multiple testing results, and the position of the reflection point is 0.184 m.
When the bending degree of the optical fiber is 3, the multi-time test result shows that two reflection points are arranged, the positions of the reflection points are 0.119m and 0.184m respectively, the difference between 0.119m in the test result and the actually measured bending distance of 0.12m is 0.001m, the test result shows that only one reflection point is arranged and the position of the reflection point is 0.119m in the natural state of the optical fiber, and therefore the optical fiber at the bending position is broken.
When the bending degree of the optical fiber is 1, the three groups of data of the bending degree of the optical fiber is 2 and the bending degree of the optical fiber is 3 are input into a computer, the computer analyzes the multiple groups of data, and a Central Processing Unit (CPU) processes the data to automatically generate a comparison table.
Finally, comparing the measured data and curves of multiple groups of optical fibers under different bending degrees, the bending degree of the optical fibers can be obtained, two reflection points can be measured, the detection of the excessive bending of the optical fibers can be realized, the excessive bending of the optical fibers can be detected through an OFDR technology, the OFDR is used as a backward reflection measurement technology based on frequency domain analysis, the defects of OTDR in distance resolution and OLCR in measurement distance are overcome in principle, the measurement of high distance resolution, high sensitivity and medium distance can be realized, and the optical frequency domain reflectometer is mainly used for fault detection of a medium-short distance special optical fiber network, health monitoring of large-scale components, analysis and monitoring of a coupling process of an optical fiber polarization state, and can also be used for the detection of the excessive bending of the optical fibers.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (8)
1. A technology for detecting excessive bending of an optical fiber comprises the following specific steps: preliminary test recording, preliminary bending test recording, secondary bending test recording and data comparison.
2. A technique for detecting excessive bending of an optical fiber according to claim 1, wherein: the initial test is recorded in the natural state of the optical fiber, and the optical frequency domain reflectometer is used for testing and recording the initial test, and at the moment, the power curve and the end reflection point of the optical fiber are recorded.
3. A technique for detecting excessive bending of an optical fiber according to claim 1, wherein: the preliminary bending test is recorded at a position of 0.12m of the optical fiber for bending test, and the optical frequency domain reflectometer is used for testing again and recording the power curve and the end reflection point of the optical fiber at the moment.
4. A technique for detecting excessive bending of an optical fiber according to claim 1, wherein: and the re-bending test recording also comprises the step of re-testing and recording the power curve and the end reflection point of the optical fiber at the time by using the optical frequency domain reflectometer when the bending degree of the optical fiber is 1.
5. A technique for detecting excessive bending of an optical fiber according to claim 1, wherein: and the re-bending test recording further comprises the step of re-testing and recording the power curve and the end reflection point of the optical fiber at the time by using the optical frequency domain reflectometer when the bending degree of the optical fiber is 2.
6. A technique for detecting excessive bending of an optical fiber according to claim 1, wherein: and the re-bending test recording also comprises the step of re-testing and recording the power curve and the end reflection point of the optical fiber at the time by using the optical frequency domain reflectometer when the bending degree of the optical fiber is 3.
7. A technique for detecting excessive bending of an optical fiber according to claim 1, wherein: the data comparison compares multiple groups of data of the initial test record, the initial bending test record, the secondary bending test record and the data comparison record.
8. The technique of claim 7, wherein: and the data comparison inputs a plurality of groups of data of the initial test record, the initial bending test record, the secondary bending test record and the data comparison record into a computer, and the computer analyzes the plurality of groups of data and processes the data through a Central Processing Unit (CPU) to automatically generate a comparison table.
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| CN201911281430.4A CN110954297A (en) | 2019-12-13 | 2019-12-13 | Technology for detecting excessive bending of optical fiber |
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| CN201911281430.4A CN110954297A (en) | 2019-12-13 | 2019-12-13 | Technology for detecting excessive bending of optical fiber |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1731119A (en) * | 2005-08-09 | 2006-02-08 | 中国电子科技集团公司第二十三研究所 | Automatic optical fiber monitoring method |
| CN101241040A (en) * | 2007-04-29 | 2008-08-13 | 长飞光纤光缆有限公司 | Automatic processing method and equipment for optical fiber test analysis and screening cutting |
| US8358883B2 (en) * | 2008-06-30 | 2013-01-22 | Intuitive Surgical Operations, Inc. | Fiber optic shape sensor |
| CN105658268A (en) * | 2013-10-16 | 2016-06-08 | 皇家飞利浦有限公司 | Interventional system |
| CN105823431A (en) * | 2016-03-25 | 2016-08-03 | 江苏骏龙电力科技股份有限公司 | Optical fiber over-bending detection method |
| CN108351295A (en) * | 2015-12-14 | 2018-07-31 | 直观外科手术操作公司 | Device and method for the three-dimensional data for using optical fiber shape sensing generation anatomical object |
| CN110023732A (en) * | 2016-11-22 | 2019-07-16 | 骁阳网络有限公司 | The detection of gain and the exaggeration of damage in unidirectional OTDR trace |
-
2019
- 2019-12-13 CN CN201911281430.4A patent/CN110954297A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1731119A (en) * | 2005-08-09 | 2006-02-08 | 中国电子科技集团公司第二十三研究所 | Automatic optical fiber monitoring method |
| CN101241040A (en) * | 2007-04-29 | 2008-08-13 | 长飞光纤光缆有限公司 | Automatic processing method and equipment for optical fiber test analysis and screening cutting |
| US8358883B2 (en) * | 2008-06-30 | 2013-01-22 | Intuitive Surgical Operations, Inc. | Fiber optic shape sensor |
| CN105658268A (en) * | 2013-10-16 | 2016-06-08 | 皇家飞利浦有限公司 | Interventional system |
| CN108351295A (en) * | 2015-12-14 | 2018-07-31 | 直观外科手术操作公司 | Device and method for the three-dimensional data for using optical fiber shape sensing generation anatomical object |
| CN105823431A (en) * | 2016-03-25 | 2016-08-03 | 江苏骏龙电力科技股份有限公司 | Optical fiber over-bending detection method |
| CN110023732A (en) * | 2016-11-22 | 2019-07-16 | 骁阳网络有限公司 | The detection of gain and the exaggeration of damage in unidirectional OTDR trace |
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