JP4929949B2 - 光ファイバ分布型センサ及び光ファイバ分布型検知方法 - Google Patents
光ファイバ分布型センサ及び光ファイバ分布型検知方法 Download PDFInfo
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- JP4929949B2 JP4929949B2 JP2006261045A JP2006261045A JP4929949B2 JP 4929949 B2 JP4929949 B2 JP 4929949B2 JP 2006261045 A JP2006261045 A JP 2006261045A JP 2006261045 A JP2006261045 A JP 2006261045A JP 4929949 B2 JP4929949 B2 JP 4929949B2
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- 239000013307 optical fiber Substances 0.000 title claims description 90
- 238000001514 detection method Methods 0.000 title claims description 29
- 238000005259 measurement Methods 0.000 claims description 90
- 230000008859 change Effects 0.000 claims description 80
- 239000000523 sample Substances 0.000 claims description 58
- 238000001228 spectrum Methods 0.000 claims description 23
- 230000003287 optical effect Effects 0.000 description 15
- 238000000034 method Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- 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
- 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
- G01D5/35341—Sensor working in transmission
- G01D5/35348—Sensor working in transmission using stimulated emission to detect the measured quantity
-
- 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
- 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
- G01M11/083—Testing mechanical properties by using an optical fiber in contact with the device under test [DUT]
- G01M11/085—Testing mechanical properties by using an optical fiber in contact with the device under test [DUT] the optical fiber being on or near the surface of the DUT
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Optical Transform (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Radiation Pyrometers (AREA)
- Length Measuring Devices By Optical Means (AREA)
Description
Kazuo HOTATE, et al., 「Simplified Systemof Fiber Brillouin Optical Correlation Domain Analysis for Distributed StrainSensing」, 第16回光ファイバセンサ国際会議(OFS-16), 2003年10月, We2-3, p.290-293
式(1)において、g0は最大ゲイン、νBは中心周波数、ΔνBは線幅(半値全幅)を示す。最大ゲインg0、中心周波数νB、及び線幅ΔνBは、BGSを特徴付けるパラメタである。これらのパラメタは、光ファイバにおけるブリルアン散乱光が発生した発生位置の温度又は歪に依存して変化する。
式(2)において、ugはプローブ光及びポンプ光の群速度、mは変調指数、νmは変調周波数を示す。なお、この区間の位置は、プローブ光及びポンプ光の位相差に依存する。
Claims (3)
- 同一の変調周波数及び変調指数で変調されると共に互いの位相差が設定されたプローブ光及びポンプ光を出力する光源と、
測定対象物に設置され、前記光源から出力された前記プローブ光及び前記ポンプ光を両端からそれぞれ入力し、当該入力したプローブ光及びポンプ光の伝搬に伴い発生するブリルアン散乱光を出力する光ファイバと、
前記光ファイバから出力されたプローブ光を受光し、前記ブリルアン散乱光によって利得を受けたプローブ光の利得ペクトル(以下、BGSとする)の形状データを測定するスペクトル測定部と、
前記変調周波数又は前記変調指数を制御することにより前記BGSを発生させる区間の長さを設定すると共に、前記位相差を制御することにより前記区間の位置を前記光ファイバの長手方向に沿って設定する制御部と、
前記スペクトル測定部によって測定されたBGSの形状データに基づいて前記光ファイバの温度変化又は歪変化が発生した位置を検知する検知部とを備え、
前記制御部は、前記区間の位置と前記区間の長さのパターンを時間帯毎に設定し、前記設定されたパターンに基づいて測定するよう指示する
ことを特徴とする光ファイバ分布型センサ。 - 光源が、同一の変調周波数及び変調指数で変調されると共に互いの位相差が設定されたプローブ光及びポンプ光を出力し、制御部が、前記変調周波数又は前記変調指数を制御することによりブリルアンゲインスペクトル(以下、BGSとする)を発生させる区間の長さを設定すると共に、前記位相差を制御することにより前記区間の位置を前記光ファイバの長手方向に沿って設定し、光ファイバが、測定対象物に設置され、前記光源から出力されたプローブ光及びポンプ光を両端からそれぞれ入力し、当該入力したプローブ光及びポンプ光の伝搬に伴い発生するブリルアン散乱光を出力し、スペクトル測定部が、前記光ファイバから出力されたプローブ光を受光し、当該受光したプローブ光のBGSの形状データを測定する測定ステップと、
検知部が、前記測定ステップにおいて測定されるBGSの形状データに基づいて前記光ファイバの温度変化又は歪変化が発生した位置を検知する検知ステップと、
前記検知ステップにおいて前記測定対象物上のある領域で前記光ファイバの温度変化又は歪変化の発生が検知された場合に、前記ある領域において前記変調周波数又は前記変調指数を制御することにより前記BGSを発生させる区間の長さをより小さな他の値に設定すると共に、前記位相差を制御することにより前記ある領域を含む領域に設定し、再度の前記BGSの形状データを測定する制御ステップと
を備えることを特徴とする光ファイバ分布型検知方法。 - 1回目のBGSの形状データの測定において、前記区間の長さを前記測定対象物上の全領域を測定することが可能な所定の長さに設定し、前記全領域を測定し、
前記再度のBGSの形状データの測定において、前記ある領域においてのみ前記他の値に設定する
ことを特徴とする請求項2記載の光ファイバ分布型検知方法。
Priority Applications (5)
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JP2006261045A JP4929949B2 (ja) | 2006-09-26 | 2006-09-26 | 光ファイバ分布型センサ及び光ファイバ分布型検知方法 |
US12/443,113 US7995874B2 (en) | 2006-09-26 | 2007-09-19 | Optical fiber distribution type sensor and optical fiber distribution type detecting method |
EP07828255A EP2068126A4 (en) | 2006-09-26 | 2007-09-19 | SENSOR FOR FIBER DISTRIBUTION TYPES AND METHOD FOR DETECTING FIBROUS DISTRIBUTION TYPES |
CN2007800357820A CN101517376B (zh) | 2006-09-26 | 2007-09-19 | 光纤分布型传感器及光纤分布型检测方法 |
PCT/JP2007/068160 WO2008050557A1 (fr) | 2006-09-26 | 2007-09-19 | Capteur du type de distribution de fibres optiques et procédé de détection du type de distribution de fibres optiques |
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JP2006261045A JP4929949B2 (ja) | 2006-09-26 | 2006-09-26 | 光ファイバ分布型センサ及び光ファイバ分布型検知方法 |
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JP4929949B2 true JP4929949B2 (ja) | 2012-05-09 |
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US (1) | US7995874B2 (ja) |
EP (1) | EP2068126A4 (ja) |
JP (1) | JP4929949B2 (ja) |
CN (1) | CN101517376B (ja) |
WO (1) | WO2008050557A1 (ja) |
Families Citing this family (21)
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JP4775173B2 (ja) * | 2006-08-24 | 2011-09-21 | 住友電気工業株式会社 | 光ファイバ温度センサ |
CN101776493B (zh) * | 2010-03-10 | 2011-09-07 | 华南理工大学 | 光纤温/湿度传感器感应层及其制备方法与应用 |
JP2011248181A (ja) * | 2010-05-28 | 2011-12-08 | Hitachi Ltd | 撮像装置 |
CA2825104A1 (en) * | 2011-01-27 | 2012-08-02 | Ramot At Tel Aviv University Ltd. | Distributed and dynamical brillouin sensing in optical fibers |
CN102853857B (zh) * | 2012-09-13 | 2015-04-01 | 浙江中欣动力测控技术有限公司 | 一种长距离光纤布里渊光时域分析器 |
WO2014059571A1 (zh) * | 2012-10-15 | 2014-04-24 | 华为技术有限公司 | 一种处理光载波的方法、光器件和多载波发射机 |
JP5880728B2 (ja) | 2012-10-23 | 2016-03-09 | 富士通株式会社 | 異常検知システム及び異常検知方法 |
CA2889157C (en) * | 2012-10-26 | 2018-10-02 | Fujitsu Limited | Temperature measurement system and abnormality detection method |
CN105203383B (zh) * | 2015-09-08 | 2018-08-28 | 西宁特殊钢股份有限公司 | 一种简单可行的发蓝断口检验方法 |
JP6284051B2 (ja) * | 2016-02-25 | 2018-02-28 | 横河電機株式会社 | 光ファイバ温度分布測定システムおよび光ファイバ温度分布測定方法 |
US10948676B2 (en) * | 2018-03-24 | 2021-03-16 | Roccor, Llc | Devices, systems, and methods for flexible, deployable structure with optical fiber |
CN109462218A (zh) * | 2018-12-10 | 2019-03-12 | 深圳供电局有限公司 | 一种光电复合超导限流器绕组结构 |
CN110118594B (zh) * | 2019-04-22 | 2020-07-10 | 华中科技大学 | 一种基于偏振分极接收的光学相位解调方法和*** |
US10928435B2 (en) * | 2019-07-15 | 2021-02-23 | The Boeing Company | Electrical fault detector and method of use |
CN111024266A (zh) * | 2019-12-12 | 2020-04-17 | 北京航天控制仪器研究所 | 一种分布式光纤温度传感***空间分辨率测试方法及装置 |
CN111692972B (zh) * | 2020-06-16 | 2021-09-14 | 中国科学院国家授时中心 | 一种单纤单向光纤长度测量方法及*** |
CN113008422B (zh) * | 2020-12-18 | 2022-04-01 | 同济大学 | 一种预应力筋群锚固状态分布式监测结构和方法 |
TWI788786B (zh) | 2021-02-20 | 2023-01-01 | 大象科技股份有限公司 | 光學檢測裝置及其檢測方法 |
CN113091782B (zh) * | 2021-04-26 | 2022-04-08 | 太原理工大学 | 基于pgc的相位敏感型光时域反射***及相位解调方法 |
JPWO2022269911A1 (ja) * | 2021-06-25 | 2022-12-29 | ||
WO2024069867A1 (ja) * | 2022-09-29 | 2024-04-04 | 日本電信電話株式会社 | 光ファイバの歪み又は温度を解析する装置及び方法 |
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US5144690A (en) * | 1990-12-03 | 1992-09-01 | Corning Incorporated | Optical fiber sensor with localized sensing regions |
US6532839B1 (en) * | 1996-03-29 | 2003-03-18 | Sensor Dynamics Ltd. | Apparatus for the remote measurement of physical parameters |
JP3667132B2 (ja) * | 1998-12-14 | 2005-07-06 | アンリツ株式会社 | ブリルアンゲインスペクトル測定方法および装置 |
JP3492346B2 (ja) * | 2001-11-21 | 2004-02-03 | 三菱重工業株式会社 | 歪みと温度の分布測定方法及びその装置 |
CN1598479A (zh) * | 2004-09-15 | 2005-03-23 | 南京大学 | 土体深部变形分布式光纤测量方法和*** |
JP4775094B2 (ja) * | 2006-04-21 | 2011-09-21 | 住友電気工業株式会社 | ブリルアンスペクトル測定装置 |
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US20100092127A1 (en) | 2010-04-15 |
CN101517376B (zh) | 2011-04-13 |
EP2068126A1 (en) | 2009-06-10 |
US7995874B2 (en) | 2011-08-09 |
EP2068126A4 (en) | 2012-08-01 |
JP2008082771A (ja) | 2008-04-10 |
CN101517376A (zh) | 2009-08-26 |
WO2008050557A1 (fr) | 2008-05-02 |
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