JP6486820B2 - 歪分布データ処理装置及び歪分布データ処理方法 - Google Patents
歪分布データ処理装置及び歪分布データ処理方法 Download PDFInfo
- Publication number
- JP6486820B2 JP6486820B2 JP2015256344A JP2015256344A JP6486820B2 JP 6486820 B2 JP6486820 B2 JP 6486820B2 JP 2015256344 A JP2015256344 A JP 2015256344A JP 2015256344 A JP2015256344 A JP 2015256344A JP 6486820 B2 JP6486820 B2 JP 6486820B2
- Authority
- JP
- Japan
- Prior art keywords
- distribution data
- strain distribution
- optical fiber
- strain
- interpolation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000003672 processing method Methods 0.000 title claims description 10
- 239000013307 optical fiber Substances 0.000 claims description 157
- 238000005259 measurement Methods 0.000 claims description 57
- 230000002123 temporal effect Effects 0.000 claims description 30
- 238000010586 diagram Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Classifications
-
- 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
- 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
- G01B11/161—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by interferometric means
- G01B11/162—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by interferometric means by speckle- or shearing interferometry
-
- 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
-
- 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
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Description
ここで、図3及び図4を参照して、補間部32の補間処理を説明する。
そして、各歪ゲージ16により200Hzで同期した歪みを測定した。この測定値の分布データを、歪ゲージ16の測定歪分布データという。拘束条件1における歪ゲージ16の測定歪分布データを図7に示す。更に、図7に示す0m地点における歪の時間的変化を図8に示す。図8の(a)は、時間軸方向に測定した歪を線で結んだ測定歪分布データを示しており、図8の(b)は、測定した歪をそのまま点で表わした測定歪分布データを示している。
表2に示すように、拘束条件2と拘束条件3とでは、歪ゲージ16の測定歪分布データに基づいて算出した梁部材14の固有振動数と、光ファイバセンサ17の補間歪分布データに基づいて算出した梁部材14の固有振動数とが、同じ値となる。このため、固有振動数によっては、拘束条件2と拘束条件3とを区別することは難しい。しかしながら、歪ゲージ16の測定歪分布データに基づいて算出した梁部材14の固有振動数と光ファイバセンサ17の補間歪分布データに基づいて算出した梁部材14の固有振動数とは、全ての拘束条件において、極めて近接した値となっている。このため、光ファイバセンサ17の補間歪分布データは、固有振動数における変化を表すパラメータとして十分な精度を有していることが分かる。
表3に示すように、歪ゲージ16の測定歪分布データに基づいて算出した梁部材14の減衰比と光ファイバセンサ17の補間歪分布データに基づいて算出した梁部材14の減衰比とは、拘束条件が1から拘束条件4に進むに従い離れて行く。しかしながら、上述したように、拘束条件1から拘束条件4に進むに従い橋梁モデルが経時劣化して行く状況を再現した条件となるため、この比較結果から、橋梁モデルにおける減衰比の経時的な変化傾向を推定することができる。
また、この二つの相関係数R2と、上述した歪ゲージ16の測定歪分布データと光ファイバセンサ17の補間歪分布データとに基づいて算出した固有振動数との差異(Discrepancy in Natural Frequency)と、歪ゲージ16の測定歪分布データと光ファイバセンサ17の補間歪分布データとに基づいて算出した減衰比の差異(Discrepancy in Damping Ratio)と、を同じ図にプロットした。プロットした図を図18に示す。図18において、横軸は、正規化した固有振動数(Normalized Natural Frequency)を示し、左縦軸は、差異(Discrepancy)を示し、右縦軸は、相関係数R2を示す。
Claims (6)
- 測定する位置を切り替えながら各位置の歪みを計測する分布型の光ファイバセンサが異なる時刻に前記光ファイバの複数の位置の歪みを測定した複数の歪測定値からなる歪分布データを取得する取得部と、
前記取得部が取得した前記歪分布データの時間及び位置の面補間により、同一時刻における前記光ファイバの複数の位置の歪みを算出する補間部と、を備えることを特徴とする、
歪分布データ処理装置。 - 前記補間部は、前記取得部が取得した前記歪分布データの歪み及び位置の面補間により、同一位置における前記光ファイバの複数の時間の歪みを算出することを特徴とする、
請求項1に記載の歪分布データ処理装置。 - 前記補間部が補間した前記歪分布データから、前記光ファイバを取り付けた測定対象物の歪分布の時間的変化を算出する算出部を更に備えることを特徴とする、
請求項1又は2に記載の歪分布データ処理装置。 - 前記補間部が補間した前記歪分布データを出力する出力部を更に備えることを特徴とする、
請求項1〜3の何れか一項に記載の歪分布データ処理装置。 - 測定する位置を切り替えながら各位置の歪みを計測する分布型の光ファイバセンサが異なる時刻に前記光ファイバの複数の位置の歪みを測定した複数の歪測定値からなる歪分布データを取得する取得ステップと、
前記取得ステップにおいて取得した前記歪分布データの時間及び位置の面補間により、同一時刻における前記光ファイバの複数の位置の歪みを算出する補間ステップと、を備えることを特徴とする、
歪分布データ処理方法。 - 前記補間ステップでは、前記取得ステップにおいて取得した前記歪分布データの歪み及び位置の面補間により、同一位置における前記光ファイバの複数の時間の歪みを算出することを特徴とする、
請求項5に記載の歪分布データ処理方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015256344A JP6486820B2 (ja) | 2015-12-28 | 2015-12-28 | 歪分布データ処理装置及び歪分布データ処理方法 |
EP16205942.2A EP3187821B1 (en) | 2015-12-28 | 2016-12-21 | A data processor and a data processing method |
CN201611218268.8A CN106918293B (zh) | 2015-12-28 | 2016-12-26 | 数据处理装置及数据处理方法 |
US15/390,773 US20170184463A1 (en) | 2015-12-28 | 2016-12-27 | Data processor and a data processing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015256344A JP6486820B2 (ja) | 2015-12-28 | 2015-12-28 | 歪分布データ処理装置及び歪分布データ処理方法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2018220504A Division JP2019049566A (ja) | 2018-11-26 | 2018-11-26 | 歪分布データ処理装置及び歪分布データ処理方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2017120210A JP2017120210A (ja) | 2017-07-06 |
JP6486820B2 true JP6486820B2 (ja) | 2019-03-20 |
Family
ID=57906387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2015256344A Active JP6486820B2 (ja) | 2015-12-28 | 2015-12-28 | 歪分布データ処理装置及び歪分布データ処理方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20170184463A1 (ja) |
EP (1) | EP3187821B1 (ja) |
JP (1) | JP6486820B2 (ja) |
CN (1) | CN106918293B (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110207804B (zh) * | 2019-06-21 | 2020-07-14 | 华中科技大学 | 一种基于单模光纤分布式声学传感的离散化处理方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3106443B2 (ja) * | 1992-07-09 | 2000-11-06 | 住友電気工業株式会社 | 温度分布測定方法及びその装置 |
JP2001194191A (ja) * | 2000-01-14 | 2001-07-19 | Nippon Koei Yokohama Works Co Ltd | 土木構造物の変位計測方法および装置 |
JP2002243588A (ja) * | 2001-02-20 | 2002-08-28 | Ando Electric Co Ltd | 波長分散分布測定器、及びその測定方法 |
JP2004020314A (ja) * | 2002-06-14 | 2004-01-22 | Nippon Telegr & Teleph Corp <Ntt> | 高感度歪計測装置 |
DE102006023588B3 (de) * | 2006-05-17 | 2007-09-27 | Sächsisches Textilforschungsinstitut eV | Verwendung eines multifunktionalen, sensorbasierten Geotextilsystems zur Deichertüchtigung, für räumlich ausgedehntes Deichmonitoring sowie für die Gefahrenerkennung im Hochwasserfall |
JP5168839B2 (ja) * | 2006-07-31 | 2013-03-27 | 横河電機株式会社 | 光ファイバ特性測定装置 |
JP5122120B2 (ja) * | 2006-12-13 | 2013-01-16 | 横河電機株式会社 | 光ファイバ特性測定装置 |
JPWO2008084637A1 (ja) * | 2007-01-10 | 2010-04-30 | 住友電気工業株式会社 | 対象物の温度分布測定方法及びセンサユニット |
ITRM20070135A1 (it) * | 2007-03-15 | 2008-09-16 | Space Software Italia S P A | Apparato per il rilevamento di oggetti immersi in materiali incoerenti e metodo di rilevamento |
JP2008256462A (ja) * | 2007-04-03 | 2008-10-23 | Fanuc Ltd | 形状データの画像表示方法 |
EP2362190B1 (en) * | 2008-11-27 | 2018-02-21 | Neubrex Co., Ltd. | Distributed optical fiber sensor |
RU2013138287A (ru) * | 2011-01-27 | 2015-03-10 | Рамот Ат Тель Авив Юниверсити Лтд. | Обнаружение распределенного и динамического рассеяния мандельштама-бриллюэна в волоконных световодах |
CN102519502B (zh) * | 2011-10-25 | 2014-07-23 | 合肥工业大学 | 基于波分复用多通道输出时域地址查询技术的光纤光栅传感方法及系统 |
-
2015
- 2015-12-28 JP JP2015256344A patent/JP6486820B2/ja active Active
-
2016
- 2016-12-21 EP EP16205942.2A patent/EP3187821B1/en active Active
- 2016-12-26 CN CN201611218268.8A patent/CN106918293B/zh active Active
- 2016-12-27 US US15/390,773 patent/US20170184463A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP3187821B1 (en) | 2018-08-22 |
US20170184463A1 (en) | 2017-06-29 |
CN106918293A (zh) | 2017-07-04 |
CN106918293B (zh) | 2022-02-22 |
EP3187821A1 (en) | 2017-07-05 |
JP2017120210A (ja) | 2017-07-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6411605B2 (ja) | 干渉検知システムの動き補償のための方法及び装置 | |
US10132614B2 (en) | Dissimilar cores in multicore optical fiber for strain and temperature separation | |
JP6167117B2 (ja) | 光センサ | |
CN107430013B (zh) | 使用参考光纤干涉数据配准测量的光纤干涉数据 | |
US10295380B2 (en) | Method and apparatus for multiple localized interferometric measurements | |
Kissinger et al. | Dynamic fiber-optic shape sensing using fiber segment interferometry | |
EP3011490A1 (en) | Methods and apparatus segmented calibration of a sensing optical fiber | |
JP2005283155A (ja) | 光干渉断層像撮像法における分散補正装置 | |
JP2008249515A (ja) | 温度分布測定システム及び温度分布測定方法 | |
JP5575161B2 (ja) | 屈折率分布計測方法および屈折率分布計測装置 | |
JP6486820B2 (ja) | 歪分布データ処理装置及び歪分布データ処理方法 | |
KR101434393B1 (ko) | 카메라 이미지를 이용한 진동변위 측정방법 | |
JP2013083581A5 (ja) | ||
Wada et al. | Analytical investigation of response of birefringent fiber Bragg grating sensors in distributed monitoring system based on optical frequency domain reflectometry | |
Castro et al. | Evaluation of the measurement uncertainty of a positional error calibrator based on a laser interferometer | |
JP2019049566A (ja) | 歪分布データ処理装置及び歪分布データ処理方法 | |
JP2017198613A (ja) | 屈折率計測方法、屈折率計測装置、及び光学素子の製造方法 | |
JP6797439B2 (ja) | 三次元ホワイトライトスキャナ較正方法 | |
Lassila et al. | Wave front and phase correction for double-ended gauge block interferometry | |
Hammond et al. | Modal analysis using fiber Bragg gratings | |
Pomarico et al. | Optical fiber strain gauge based on speckle correlation | |
JP6418028B2 (ja) | 光ファイバ温度分布測定装置 | |
Egan et al. | Random depth access full-field low-coherence interferometry applied to a small punch test | |
KR100927542B1 (ko) | 간섭 광학식 2차원 변형률측정 장치 및 방법 | |
EP2921817A1 (en) | Real-time shape measuring method and system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20171207 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20180130 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20180322 |
|
A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20180828 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20181126 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20181203 |
|
A911 | Transfer to examiner for re-examination before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20181221 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20190219 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20190220 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 6486820 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |