JP7343043B2 - 特定システム、特定装置および特定方法 - Google Patents

特定システム、特定装置および特定方法 Download PDF

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Publication number
JP7343043B2
JP7343043B2 JP2022510651A JP2022510651A JP7343043B2 JP 7343043 B2 JP7343043 B2 JP 7343043B2 JP 2022510651 A JP2022510651 A JP 2022510651A JP 2022510651 A JP2022510651 A JP 2022510651A JP 7343043 B2 JP7343043 B2 JP 7343043B2
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Japan
Prior art keywords
optical fiber
unit
identification
fiber
backscattered light
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JP2022510651A
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English (en)
Japanese (ja)
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JPWO2021193807A5 (https=
JPWO2021193807A1 (https=
Inventor
幸英 依田
直人 小倉
義明 青野
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NEC Corp
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NEC Corp
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Priority to JP2023112806A priority Critical patent/JP7517555B2/ja
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
    • G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
    • G01L5/105—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using electro-optical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
    • G01K11/324—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres using Raman scattering
    • 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
    • G01M11/08—Testing mechanical properties
    • G01M11/088—Testing mechanical properties of optical fibres; Mechanical features associated with the optical testing of optical fibres
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
    • G01N21/474—Details of optical heads therefor, e.g. using optical fibres
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
    • G01N21/474—Details of optical heads therefor, e.g. using optical fibres
    • G01N2021/4742—Details of optical heads therefor, e.g. using optical fibres comprising optical fibres
    • G01N2021/4745—Fused bundle, i.e. for backscatter

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Biochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Light Guides In General And Applications Therefor (AREA)
JP2022510651A 2020-03-26 2021-03-25 特定システム、特定装置および特定方法 Active JP7343043B2 (ja)

Priority Applications (1)

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JP2023112806A JP7517555B2 (ja) 2020-03-26 2023-07-10 特定システム、特定装置および特定方法

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JP2020055613 2020-03-26
JP2020055613 2020-03-26
PCT/JP2021/012488 WO2021193807A1 (ja) 2020-03-26 2021-03-25 特定システム、特定装置および特定方法

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JPWO2021193807A5 JPWO2021193807A5 (https=) 2022-10-12
JP7343043B2 true JP7343043B2 (ja) 2023-09-12

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117830915A (zh) * 2022-09-29 2024-04-05 华为技术有限公司 一种光缆下垂识别方法和装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006145465A (ja) 2004-11-24 2006-06-08 Japan Atomic Energy Agency マルチ情報計測用光ファイバ

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02187641A (ja) * 1989-01-17 1990-07-23 Fujikura Ltd 光ファイバ線路状態の監視方法
JP3222046B2 (ja) * 1995-10-09 2001-10-22 株式会社フジクラ 光ファイバ歪測定装置
US20080011514A1 (en) * 2006-07-14 2008-01-17 Tenvera, Inc. Optical Fiber Distribution Apparatus and Method
JP4819165B2 (ja) * 2010-01-13 2011-11-24 株式会社日立製作所 光通信システム及びその監視方法
JP6277141B2 (ja) * 2015-02-02 2018-02-07 日本電信電話株式会社 分岐を有する長距離光ファイバの試験方法、及び装置
US10205552B2 (en) * 2017-01-20 2019-02-12 Cox Communications, Inc. Optical communications module link, systems, and methods
US10571509B2 (en) * 2017-10-17 2020-02-25 Facebook, Inc. Systems and methods for distributed sensing of a powerline conductor
US11512584B2 (en) * 2020-01-31 2022-11-29 Halliburton Energy Services, Inc. Fiber optic distributed temperature sensing of annular cement curing using a cement plug deployment system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006145465A (ja) 2004-11-24 2006-06-08 Japan Atomic Energy Agency マルチ情報計測用光ファイバ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
岡本 達也，外２名，光ファイバ振動分布測定による架空ケーブル弛み区間の特定，電子情報通信学会２０１９年総合大会講演論文集，2019年，B-13-11，p.303

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WO2021193807A1 (ja) 2021-09-30
US20230078369A1 (en) 2023-03-16
JP7517555B2 (ja) 2024-07-17
JP2023145498A (ja) 2023-10-11
JPWO2021193807A1 (https=) 2021-09-30

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