JP6980132B2 - 分散型センサの時空間ノイズ除去 - Google Patents
分散型センサの時空間ノイズ除去 Download PDFInfo
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- 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
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- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/02—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
- G01N23/203—Measuring back scattering
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Description
このような適用性にもかかわらず、センシングを困難にし、エラーを生じさせるノイズを有するリターン信号を含む多くの実装上の困難が知られている。したがって、このような信号ノイズに関連する困難を軽減または排除するシステム、方法及び構成は、当該技術分野で歓迎すべき追加の事項である。
Claims (2)
- 分散型センサシステムの一部として構成された分散型センサデータの時空間ノイズ除去のための、コンピュータで実現される改良方法において、
時間領域及び空間領域のデータのノイズ除去を同時に行い、
ウォーターフォールデータが2次元アレイW(x i ,t j )で表され、x i =x 1 ,x 2 ,...x I であり、t j =t 1 ,t 2 ,...,t J であり、x I 及びt J が前記ウォーターフォールの列及び行の要素数であり、
それぞれの時点における位置(「注目ポイント」またはPOIと呼ばれるウォーターフォールプロット上のあるポイント)
前記時空間ウィンドウがW(x k ,t l )で表され、
前記時空間ウィンドウ内において、センサデータの値(z軸の値)が閾値(W th )を超える画素数
このPOIに対するパーセントの比rを得るために、pと前記ウィンドウサイズとの比が、
ここで、
前記比rが、特定の時点における特定の位置に関するノイズ除去値として出力されることを特徴とする改良方法。 - 前記ノイズ除去を同時に行うことが、センシング動作と同時にリアルタイムで実行されることを特徴とする、請求項1記載の改良方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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US201862691165P | 2018-06-28 | 2018-06-28 | |
US62/691,165 | 2018-06-28 | ||
US16/455,009 US11132542B2 (en) | 2018-06-28 | 2019-06-27 | Time-space de-noising for distributed sensors |
US16/455,009 | 2019-06-27 | ||
PCT/US2019/039855 WO2020006427A1 (en) | 2018-06-28 | 2019-06-28 | Time-space de-noising for distributed sensors |
Publications (2)
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JP2021512340A JP2021512340A (ja) | 2021-05-13 |
JP6980132B2 true JP6980132B2 (ja) | 2021-12-15 |
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JP2020562107A Active JP6980132B2 (ja) | 2018-06-28 | 2019-06-28 | 分散型センサの時空間ノイズ除去 |
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US (1) | US11132542B2 (ja) |
JP (1) | JP6980132B2 (ja) |
DE (1) | DE112019000692B4 (ja) |
WO (1) | WO2020006427A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7164027B2 (ja) * | 2019-04-16 | 2022-11-01 | 日本電気株式会社 | 光ファイバセンサ、監視システム、センシング位置補正方法、及び、センシング位置補正プログラム |
US11543285B2 (en) * | 2020-01-13 | 2023-01-03 | Nec Corporation | Distributed optical fiber sensing using point sensors |
US11422146B2 (en) * | 2020-04-06 | 2022-08-23 | Nec Corporation | Wind speed measurement using distributed fiber optic sensing |
CN112883802A (zh) * | 2021-01-20 | 2021-06-01 | 刘信 | 一种管道光纤振动安全预警系统破坏性事件的识别方法 |
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JP4752407B2 (ja) * | 2005-09-09 | 2011-08-17 | ソニー株式会社 | 画像処理装置および方法、プログラム、並びに記録媒体 |
GB0815297D0 (en) * | 2008-08-21 | 2008-09-24 | Qinetiq Ltd | Conduit monitoring |
US8407550B2 (en) * | 2009-08-14 | 2013-03-26 | Mitsubishi Electric Research Laboratories, Inc. | Method and system for decoding graph-based codes using message-passing with difference-map dynamics |
US9705607B2 (en) * | 2011-10-03 | 2017-07-11 | Cornell University | System and methods of acoustic monitoring |
CN105359478B (zh) * | 2013-07-05 | 2019-05-28 | 索尼公司 | 使用非均匀星座的编码和调制设备 |
JP6356449B2 (ja) * | 2014-03-19 | 2018-07-11 | 株式会社東芝 | センサ診断装置、センサ診断方法、およびコンピュータプログラム |
US10267141B2 (en) * | 2014-07-18 | 2019-04-23 | Halliburton Energy Services, Inc. | Distributed sensing systems and methods with efficient energy spectrum analysis |
WO2016018280A1 (en) * | 2014-07-30 | 2016-02-04 | Halliburton Energy Services, Inc. | Distributed sensing systems and methods with i/q data balancing based on ellipse fitting |
US20160098820A1 (en) * | 2014-10-03 | 2016-04-07 | Raghu Kopalle | System for robust denoising of images |
JP6165821B2 (ja) * | 2014-11-03 | 2017-07-19 | オーエフエス ファイテル,エルエルシー | 分布型ブリルアンセンサー |
JP6428350B2 (ja) * | 2015-02-18 | 2018-11-28 | 富士通株式会社 | 温度測定システム、温度測定方法及びプログラム |
US20180087372A1 (en) | 2015-05-29 | 2018-03-29 | Halliburton Energy Services, Inc. | Methods and systems employing a controlled acoustic source and distributed acoustic sensors to identify acoustic impedance boundary anomalies along a conduit |
WO2016207776A1 (en) | 2015-06-22 | 2016-12-29 | Omnisens Sa | A method for reducing noise in measurements taken by a distributed sensor |
AU2017325116B2 (en) * | 2016-09-08 | 2020-04-09 | Fiber Sense Limited | Method and system for distributed acoustic sensing |
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- 2019-06-27 US US16/455,009 patent/US11132542B2/en active Active
- 2019-06-28 JP JP2020562107A patent/JP6980132B2/ja active Active
- 2019-06-28 WO PCT/US2019/039855 patent/WO2020006427A1/en active Application Filing
- 2019-06-28 DE DE112019000692.4T patent/DE112019000692B4/de active Active
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DE112019000692T5 (de) | 2020-12-24 |
WO2020006427A1 (en) | 2020-01-02 |
US20200005036A1 (en) | 2020-01-02 |
JP2021512340A (ja) | 2021-05-13 |
DE112019000692B4 (de) | 2022-06-02 |
US11132542B2 (en) | 2021-09-28 |
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