JP5855693B2 - 振動検出装置及び振動検出方法 - Google Patents
振動検出装置及び振動検出方法 Download PDFInfo
- Publication number
- JP5855693B2 JP5855693B2 JP2014039087A JP2014039087A JP5855693B2 JP 5855693 B2 JP5855693 B2 JP 5855693B2 JP 2014039087 A JP2014039087 A JP 2014039087A JP 2014039087 A JP2014039087 A JP 2014039087A JP 5855693 B2 JP5855693 B2 JP 5855693B2
- Authority
- JP
- Japan
- Prior art keywords
- vibration
- fbg
- bragg grating
- fiber bragg
- transmitted light
- 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
- 238000001514 detection method Methods 0.000 title claims description 139
- 230000003287 optical effect Effects 0.000 claims description 64
- 238000012360 testing method Methods 0.000 claims description 52
- 230000008859 change Effects 0.000 claims description 23
- 239000000835 fiber Substances 0.000 claims description 23
- 230000007547 defect Effects 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000007613 environmental effect Effects 0.000 claims description 9
- 230000001902 propagating effect Effects 0.000 claims description 9
- 238000002834 transmittance Methods 0.000 claims description 8
- 230000010363 phase shift Effects 0.000 claims description 2
- 239000013307 optical fiber Substances 0.000 description 37
- 238000001228 spectrum Methods 0.000 description 23
- 238000000411 transmission spectrum Methods 0.000 description 22
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 19
- 238000005259 measurement Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 9
- 238000012935 Averaging Methods 0.000 description 5
- 230000010287 polarization Effects 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000002123 temporal effect Effects 0.000 description 3
- 229910052691 Erbium Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 235000019687 Lamb Nutrition 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005314 correlation function Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- -1 erbium ions Chemical class 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2418—Probes using optoacoustic interaction with the material, e.g. laser radiation, photoacoustics
-
- 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
-
- 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
- G01D5/35306—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 an interferometer arrangement
- G01D5/35309—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 an interferometer arrangement using multiple waves interferometer
- G01D5/35316—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 an interferometer arrangement using multiple waves interferometer using a Bragg gratings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
また、本発明の実施形態に係る振動検出方法は、リング状の光路を伝搬するレーザ光を生成するステップと、透過光の波長方向における透過率分布特性が被検物体の振動に応じて変化するファイバ・ブラッグ・グレーティングに前記リング状の光路を伝搬するレーザ光を入射させるステップと、前記ファイバ・ブラッグ・グレーティングの透過光から不要な周波数帯域における成分を除去するステップと、前記不要な周波数帯域における成分が除去された前記ファイバ・ブラッグ・グレーティングの透過光に基づいて前記振動を検出するステップとを有する。
図1は本発明の実施形態に係る振動検出装置の構成図である。
次に振動検出装置1の動作および及び作用について説明する。
このため、振動検出装置1によれば、良好なSNRで高感度に被検物体Oの振動を検出することができる。その結果、平均化(アベレージング)が不要となり、計測時間及び計測回数を従来よりも低減させることができる。更に、良好な精度で被検物体Oの振動を検出することができる。これらの効果は、FBG6としてPS-FBGを用いた場合及びAFBG等の光フィルタ10を振動検出装置1に設けた場合に特に顕著である。
2 光学系
3 検出系
4 リング状の光ファイバ
5 光ファイバ増幅器
6 FBG
7 光サーキュレータ
8 光カプラ(OC: optical coupler)
9 第1の偏光制御器(PC: polarization controller)
10 光フィルタ
11 第2の偏光制御器(PC: polarization controller)
12 光スペクトラムアナライザ(OSA: optical spectrum analyzer)
13 光検出器(PD: Photo Detector)
14 電気スペクトラムアナライザ(ESA: electrical spectrum analyzer)
15 オシロスコープ
16 欠陥検出部
17 超音波送信系
18 超音波受信系
O 被検物体
Claims (11)
- リング状の光路を伝搬するレーザ光を生成するリングレーザ共振器と、
前記リング状の光路を伝搬するレーザ光が入射するように前記リングレーザ共振器に設けられ、透過光の波長方向における透過率分布特性が被検物体の振動に応じて変化するファイバ・ブラッグ・グレーティングと、
前記ファイバ・ブラッグ・グレーティングの透過光から不要な周波数帯域における成分を除去する光フィルタと、
前記不要な周波数帯域における成分が除去された前記ファイバ・ブラッグ・グレーティングの透過光に基づいて前記振動を検出する検出系と、
を備える振動検出装置。 - 前記ファイバ・ブラッグ・グレーティングを位相シフト・ファイバ・ブラッグ・グレーティングで構成した請求項1記載の振動検出装置。
- 前記検出系は、前記リングレーザ共振器において生じる複数の縦モードのうち、前記位相シフト・ファイバ・ブラッグ・グレーティングを透過する最大の強度を有する縦モードの強度の変化に基づいて前記振動を検出するように構成される請求項2記載の振動検出装置。
- 前記検出系は、前記透過率分布特性が前記振動以外の環境因子によって前記波長方向に閾値を超えるシフト量でシフトした場合には、前記シフト量に対応する別の縦モードの強度の変化に基づいて前記振動を検出するように構成される請求項3記載の振動検出装置。
- 前記光フィルタを、光サーキュレータを介して前記リングレーザ共振器に接続した請求項1乃至4のいずれか1項に記載の振動検出装置。
- 前記光フィルタをアポダイズド・ファイバ・ブラッグ・グレーティングで構成した請求項1乃至5のいずれか1項に記載の振動検出装置。
- 前記リングレーザ共振器に設けられ、前記ファイバ・ブラッグ・グレーティングの透過光を増幅して再び前記ファイバ・ブラッグ・グレーティングに入射させる光増幅器を更に備え、
前記検出系は、前記光増幅器により1回以上増幅することによって所定の強度となった前記ファイバ・ブラッグ・グレーティングの透過光に基づいて前記振動を検出するように構成される請求項1乃至6のいずれか1項に記載の振動検出装置。 - 前記被検物体に超音波による振動を付加する超音波送信系を更に備え、
前記検出系は、前記超音波による前記被検物体の振動を検出するように構成される請求項1乃至7のいずれか1項に記載の振動検出装置。 - 前記検出系は、前記被検物体において生じるアコースティック・エミッションによる振動を検出するように構成される請求項1乃至8のいずれか1項に記載の振動検出装置。
- 前記検出系は、検出された前記振動に基づいて前記被検物体の欠陥を検出するように構成される請求項1乃至9のいずれか1項に記載の振動検出装置。
- リング状の光路を伝搬するレーザ光を生成するステップと、
透過光の波長方向における透過率分布特性が被検物体の振動に応じて変化するファイバ・ブラッグ・グレーティングに前記リング状の光路を伝搬するレーザ光を入射させるステップと、
前記ファイバ・ブラッグ・グレーティングの透過光から不要な周波数帯域における成分を除去するステップと、
前記不要な周波数帯域における成分が除去された前記ファイバ・ブラッグ・グレーティングの透過光に基づいて前記振動を検出するステップと、
を有する振動検出方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014039087A JP5855693B2 (ja) | 2014-02-28 | 2014-02-28 | 振動検出装置及び振動検出方法 |
ES14195846.2T ES2622092T3 (es) | 2014-02-28 | 2014-12-02 | Aparato de detección de vibración y procedimiento de detección de vibración |
EP14195846.2A EP2913638B1 (en) | 2014-02-28 | 2014-12-02 | Vibration detection apparatus and vibration detection method |
US14/617,190 US9726645B2 (en) | 2014-02-28 | 2015-02-09 | Vibration detection apparatus and vibration detection method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014039087A JP5855693B2 (ja) | 2014-02-28 | 2014-02-28 | 振動検出装置及び振動検出方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2015161674A JP2015161674A (ja) | 2015-09-07 |
JP5855693B2 true JP5855693B2 (ja) | 2016-02-09 |
Family
ID=52015886
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2014039087A Active JP5855693B2 (ja) | 2014-02-28 | 2014-02-28 | 振動検出装置及び振動検出方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US9726645B2 (ja) |
EP (1) | EP2913638B1 (ja) |
JP (1) | JP5855693B2 (ja) |
ES (1) | ES2622092T3 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101680861B1 (ko) | 2015-10-12 | 2016-11-29 | 한국생산기술연구원 | 서큘레이터를 이용하여 역방향 출력을 활용하는 트리거신호 추출형 링레이저를 구비하는 광학단층촬영장치 및 이의 작동방법 |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3014200B1 (fr) * | 2013-12-02 | 2017-05-26 | Commissariat Energie Atomique | Controle de structure industrielle |
JP6329188B2 (ja) * | 2016-02-29 | 2018-05-23 | 株式会社Subaru | 超音波検査システム、超音波検査方法及び航空機構造体 |
CN106053610B (zh) * | 2016-06-27 | 2017-06-20 | 河海大学 | 监测结构体安全的传感光纤声发射集成感知系统 |
CN106679789A (zh) * | 2016-11-04 | 2017-05-17 | 安徽师范大学 | 一种分布式光纤振动传感系统及其传感方法 |
CN106532417A (zh) * | 2016-11-09 | 2017-03-22 | 河北工业大学 | 一种基于环形腔形式的dbr超窄线宽激光器 |
CN108508097B (zh) * | 2017-02-28 | 2021-03-02 | 香港理工大学 | 一种基于光纤超声导波技术的铁轨裂纹监测系统 |
US10401316B2 (en) * | 2017-05-23 | 2019-09-03 | Simmonds Precision Products, Inc. | Acoustic event monitoring for triggering of health scan of a structure |
CN108981762A (zh) * | 2018-06-19 | 2018-12-11 | 广东工业大学 | 利用窄带双相移光纤光栅进行热稳定传感解调系统及方法 |
CN110849967A (zh) * | 2019-10-31 | 2020-02-28 | 江苏大学 | 一种利用光栅检测植物叶片结霜的装置及方法 |
CN111060597A (zh) * | 2020-01-09 | 2020-04-24 | 东北林业大学 | 一种声学振动检测的可控激励装置 |
CN111141836B (zh) * | 2020-01-13 | 2023-07-18 | 石河子大学 | 一种基于声振多域谱与近红外光谱信息融合的梨果早期内部病害无损检测方法及装置 |
CN111486939B (zh) * | 2020-04-24 | 2021-02-12 | 中山大学 | 一种基于sagnac原理实现光程和偏振态调控的超声测量装置 |
CN113984385A (zh) * | 2021-10-25 | 2022-01-28 | 北京航空航天大学 | 一种基于光纤环声发射传感器的装甲车齿轮箱故障诊断方法研究 |
CN113970369A (zh) * | 2021-10-25 | 2022-01-25 | 北京航空航天大学 | 一种基于网络化光纤光栅敏感元件复杂结构件模态分析方法 |
CN116818025B (zh) * | 2023-08-31 | 2023-11-24 | 武汉理工大学 | 阶跃金属镀层光纤光栅高温振动复合传感器及监测方法 |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6276585A (ja) * | 1985-09-28 | 1987-04-08 | Sharp Corp | 半導体レ−ザ素子 |
US5488475A (en) * | 1994-03-31 | 1996-01-30 | The United States Of America As Represented By The Secretary Of The Navy | Active fiber cavity strain sensor with temperature independence |
US5636021A (en) * | 1995-06-02 | 1997-06-03 | Udd; Eric | Sagnac/Michelson distributed sensing systems |
US6122305A (en) * | 1998-02-17 | 2000-09-19 | The United States Of America As Represented By The Secretary Of The Navy | Broadband mode-locked fiber laser, particularly for fiber Bragg grating interrogation |
TWI234668B (en) * | 2003-04-24 | 2005-06-21 | Univ Nat Chiao Tung | Fiber Bragg grating sensing system of light intensity and wave-divided multiplex |
JP4373842B2 (ja) * | 2004-04-26 | 2009-11-25 | 京セラ株式会社 | Fbgセンシングシステム |
US7283216B1 (en) * | 2004-06-22 | 2007-10-16 | Np Photonics, Inc. | Distributed fiber sensor based on spontaneous brilluoin scattering |
US8315282B2 (en) * | 2005-01-20 | 2012-11-20 | Massachusetts Institute Of Technology | Fourier domain mode locking: method and apparatus for control and improved performance |
US7272160B1 (en) * | 2005-01-24 | 2007-09-18 | Np Photonics, Inc | Single-frequency Brillouin fiber ring laser with extremely narrow linewidth |
JP2006208080A (ja) * | 2005-01-26 | 2006-08-10 | Hitachi Cable Ltd | 光ファイバ振動センサ |
JP2007047574A (ja) * | 2005-08-11 | 2007-02-22 | Noritsu Koki Co Ltd | 半導体レーザ光源装置 |
JP4804957B2 (ja) | 2006-02-27 | 2011-11-02 | 富士重工業株式会社 | 損傷探知システム |
ES2534572T3 (es) * | 2007-01-10 | 2015-04-24 | Lightlab Imaging, Inc. | Métodos y aparato para tomografía de coherencia óptica de fuente de barrido |
EP1992926B1 (en) * | 2007-05-16 | 2015-07-29 | Hitachi Metals, Ltd. | Optical fiber vibration sensor |
CA2682878A1 (en) * | 2008-10-15 | 2010-04-15 | Queen's University At Kingston | Optical pickup for a musical instrument |
US8400640B2 (en) * | 2008-10-23 | 2013-03-19 | Pusan National University Industry-University Cooperation Foundation | Optical sensor interrogation system based on FDML wavelength swept laser |
KR20100129867A (ko) * | 2009-06-02 | 2010-12-10 | (주)카이센 | 쓰레기 자동 집하 장치 및 쓰레기 막힘 감지 방법 |
US9019482B2 (en) * | 2009-06-05 | 2015-04-28 | The Board Of Trustees Of The Leland Stanford Junior University | Optical device with fiber Bragg grating and narrowband optical source |
JP5586009B2 (ja) * | 2010-01-22 | 2014-09-10 | 独立行政法人産業技術総合研究所 | 振動検出システム、該システムを用いた装置及び振動検出方法 |
JP5586011B2 (ja) * | 2010-03-18 | 2014-09-10 | 独立行政法人産業技術総合研究所 | Fbg振動検出システム、該システムを用いた装置及び振動検出方法 |
JP5945120B2 (ja) * | 2012-01-12 | 2016-07-05 | 株式会社フジクラ | 光ファイバセンサおよびこれを用いたひずみと温度の同時計測方法 |
JP6159095B2 (ja) | 2013-02-05 | 2017-07-05 | 株式会社Subaru | 変位計測装置及び変位計測方法 |
-
2014
- 2014-02-28 JP JP2014039087A patent/JP5855693B2/ja active Active
- 2014-12-02 EP EP14195846.2A patent/EP2913638B1/en active Active
- 2014-12-02 ES ES14195846.2T patent/ES2622092T3/es active Active
-
2015
- 2015-02-09 US US14/617,190 patent/US9726645B2/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101680861B1 (ko) | 2015-10-12 | 2016-11-29 | 한국생산기술연구원 | 서큘레이터를 이용하여 역방향 출력을 활용하는 트리거신호 추출형 링레이저를 구비하는 광학단층촬영장치 및 이의 작동방법 |
Also Published As
Publication number | Publication date |
---|---|
EP2913638B1 (en) | 2017-02-08 |
JP2015161674A (ja) | 2015-09-07 |
US20150247826A1 (en) | 2015-09-03 |
US9726645B2 (en) | 2017-08-08 |
ES2622092T3 (es) | 2017-07-05 |
EP2913638A1 (en) | 2015-09-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5855693B2 (ja) | 振動検出装置及び振動検出方法 | |
JP5586011B2 (ja) | Fbg振動検出システム、該システムを用いた装置及び振動検出方法 | |
JP5030081B2 (ja) | Ae・超音波検出システム、及びそれを備えた材料監視装置並びに非破壊検査装置 | |
US8922789B2 (en) | Displacement measuring device and displacement measuring method | |
JP4930107B2 (ja) | 光ファイバのpmd特性測定方法、線引方法、異常個所特定方法、光ファイバ伝送路構築方法 | |
US20160363562A1 (en) | Ultrasonic test system, ultrasonic test method and aircraft structural object | |
KR101605837B1 (ko) | 파장 가변 레이저를 이용한 광선로 검사기 | |
WO2019194020A1 (ja) | 環境特性測定装置および環境特性測定方法 | |
WO2012075474A2 (en) | Dfb fiber laser bend sensor and optical heterodyne microphone | |
JP2015021814A (ja) | 衝撃検知方法及び検知装置 | |
JP5586009B2 (ja) | 振動検出システム、該システムを用いた装置及び振動検出方法 | |
WO2014074974A1 (en) | Dynamic fiber bragg grating interrogation system and method | |
US20120174677A1 (en) | Optical method and device for a spatially resolved measurement of mechanical parameters, in particular mechanical vibrations by means of glass fibers | |
JP2015055563A (ja) | 情報取得装置及び情報取得方法 | |
EP2948780B1 (en) | Acousto-optic rf signal spectrum analyzer | |
WO2015120888A1 (en) | Dual-probe sweep-free stimulated brillouin optical distributed sensing method and device | |
JP5388225B2 (ja) | 光パルス試験装置およびその方法 | |
Lee et al. | Integrated guided wave generation and sensing using a single laser source and optical fibers | |
KR20220027217A (ko) | 광섬유 측정 시스템, 통신 광섬유를 측정 시스템에 적용하는 방법, 및 광섬유 측정 및 통신 시스템 | |
EP3150969B1 (en) | Sensor for measuring the distribution of physical magnitudes in an optical fibre and associated measuring method | |
WO2015030569A1 (en) | All fibre based diaphragm-less optical microphone | |
Frankforter et al. | Piezo-optical measurements for guided wave and acoustic emission structural health monitoring | |
Duggal et al. | Optical detection of ultrasound using a microchip laser | |
Rivera-Pérez et al. | A new technique for the measurement of the nonlinear refractive index in optical fibers | |
WADA et al. | Measurement of Underwater Acoustic Field Using Fabry–Perot Interferometer with Chirped Fiber Bragg Gratings |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20150915 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20151110 |
|
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: 20151201 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20151209 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 5855693 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |