JPWO2015044998A1 - 光ファイバコード及び異常検知システム - Google Patents
光ファイバコード及び異常検知システム Download PDFInfo
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- JPWO2015044998A1 JPWO2015044998A1 JP2015538651A JP2015538651A JPWO2015044998A1 JP WO2015044998 A1 JPWO2015044998 A1 JP WO2015044998A1 JP 2015538651 A JP2015538651 A JP 2015538651A JP 2015538651 A JP2015538651 A JP 2015538651A JP WO2015044998 A1 JPWO2015044998 A1 JP WO2015044998A1
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- 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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35338—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using other arrangements than interferometer arrangements
- G01D5/35354—Sensor working in reflection
- G01D5/35358—Sensor working in reflection using backscattering to detect the measured quantity
- G01D5/35364—Sensor working in reflection using backscattering to detect the measured quantity using inelastic backscattering to detect the measured quantity, e.g. using Brillouin or Raman backscattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/143—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations for measuring surface temperatures
-
- 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
-
- 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
- G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/4436—Heat resistant
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- Health & Medical Sciences (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Optical Transform (AREA)
Abstract
Description
図4(a)は実施形態に係る光ファイバコードの構造を示す模式平面図、図4(b)は同じくその模式断面図である。
図19は、実施形態に係る異常検知システムを示すブロック図である。また、図20は後方散乱光のスペクトルを示す図、図21は散乱光検出装置で検出されるラマン散乱光の強度の時系列分布を示す図である。
Claims (16)
- 光ファイバと、
複数本の糸を組紐状に編組して形成され前記光ファイバを被覆する被覆材と
を有することを特徴とする光ファイバコード。 - 前記被覆材の耐熱温度が300℃以上であることを特徴とする請求項1に記載の光ファイバコード。
- 前記光ファイバの直径をR、前記被覆材の編組周期をLとしたときに
(((L2+(π.R)2))1/2−L)÷L≦0.2(%)
を満足することを特徴とする請求項1又は2に記載の光ファイバコード。 - 前記光ファイバの周面にカーボン又は樹脂のコート材がコートされていることを特徴とする請求項1乃至3のいずれか1項に記載の光ファイバコード。
- 前記被覆材を構成する糸のヤング率が、前記コート材のヤング率よりも大きいことを特徴とする請求項4に記載の光ファイバコード。
- 前記被覆材単体の伸びが、同じ荷重を印加したときの前記光ファイバ単体の伸びよりも大きいことを特徴とする請求項1乃至5のいずれか1項に記載の光ファイバコード。
- 前記被覆材には、基準点からの距離を示すデータが印字されていることを特徴とする請求項1乃至6のいずれか1項に記載の光ファイバコード。
- 複数本の糸を組紐状に編組した被覆材に被覆された光ファイバと、
前記光ファイバ内で発生する散乱光を検出し、前記光ファイバの長さ方向における強度分布のデータを出力する散乱光検出部と、
前記散乱光検出部の出力に基づき異常の有無を判定するデータ処理部と
を有することを特徴とする異常検知システム。 - 前記被覆材の耐熱温度が300℃以上であることを特徴とする請求項8に記載の異常検知システム。
- 前記光ファイバの直径をR、前記被覆材の編組周期をLとしたときに
(((L2+(π.R)2))1/2−L)÷L≦0.2(%)
を満足することを特徴とする請求項8乃至9のいずれか1項に記載の異常検知システム。 - 前記光ファイバの周面にカーボン又は樹脂のコート材がコートされていることを特徴とする請求項8乃至10のいずれか1項に記載の異常検知システム。
- 前記被覆材を構成する糸のヤング率が、前記コート材のヤング率よりも大きいことを特徴とする請求項11に記載の異常検知システム。
- 前記被覆材単体の伸びが、同じ荷重を印加したときの前記光ファイバ単体の伸びよりも大きいことを特徴とする請求項8乃至12のいずれか1項に記載の光ファイバコード。
- 前記散乱光検出部は、更に前記光ファイバ内で発生する散乱光の検出結果から、前記光ファイバの長さ方向における温度分布を検出することを特徴とする請求項8乃至13のいずれか1項に記載の異常検知システム。
- 前記データ処理部は、前記散乱光検出部の出力、又はその出力を入力とした関数にFIR(Finite Impulse Response)フィルタを作用させることを特徴とする請求項8乃至14のいずれか1項に記載の異常検知システム。
- 前記光ファイバが、配管に沿って敷設されることを特徴とする請求項8乃至15のいずれか1項に記載の異常検知システム。
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PCT/JP2013/075663 WO2015044998A1 (ja) | 2013-09-24 | 2013-09-24 | 光ファイバコード及び異常検知システム |
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JPWO2015044998A1 true JPWO2015044998A1 (ja) | 2017-03-02 |
JP6265213B2 JP6265213B2 (ja) | 2018-01-24 |
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US (1) | US10422751B2 (ja) |
JP (1) | JP6265213B2 (ja) |
WO (1) | WO2015044998A1 (ja) |
Families Citing this family (7)
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FR3047308B1 (fr) * | 2016-02-02 | 2018-02-16 | Saipem S.A. | Procede de surveillance du comportement thermomecanique d'une conduite sous-marine de transport de fluides sous pression |
CN105865651B (zh) * | 2016-06-20 | 2018-03-20 | 中国工程物理研究院流体物理研究所 | 一种基于反射率的动高压加载下材料温度测量系统及方法 |
FR3070499B1 (fr) * | 2017-08-31 | 2019-09-06 | Saipem S.A. | Procede de determination des variations de contraintes au cours du temps d'une conduite sous-marine de transport de fluides |
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WO2015044998A1 (ja) | 2015-04-02 |
US20160169807A1 (en) | 2016-06-16 |
JP6265213B2 (ja) | 2018-01-24 |
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