JP2023538474A - ケーブル切断防止のための統計的画像処理に基づく異常検出 - Google Patents
ケーブル切断防止のための統計的画像処理に基づく異常検出 Download PDFInfo
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- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
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- 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
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
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Abstract
Description
Claims (10)
- 光ファイバのインフラストラクチャに対する異常な活動および脅威評価を決定する方法であって、
前記インフラストラクチャの一部である光ファイバケーブルと光通信する分散型光ファイバセンシング(DFOS)/分散型音響センシング(DAS)のシステムを提供し、
前記DFOS/DASを動作させて、前記光ファイバケーブルの長さに沿ったベースラインの振動レベルを決定し、前記光ファイバケーブルの前記長さに沿った特定の位置に関連する前記ベースラインの振動レベルを記憶し、
前記DFOS/DASを連続的に動作させ、前記光ファイバケーブルの前記長さに沿った1つ以上の位置で検出された振動事象が、それらの1つ以上の位置での記憶された前記ベースラインの振動レベルに対して所定の閾値(カットオフポイント)を超えた場合に警報を発生させることを含む、方法。 - 前記光ファイバケーブルの前記長さに沿った1つの位置における前記所定の閾値は、前記光ファイバケーブルに沿った別の位置における前記所定の閾値とは異なる、請求項1に記載の方法。
- 橋梁構造物に近接する位置についての前記所定の閾値は、橋梁構造物に近接していない他の位置についての所定の閾値よりも高い、請求項2に記載の方法。
- 前記警報の発生手順は、正常状態のバックグラウンド、位置固有の誤警報率レベルおよびユーザ指定の誤警報率レベルを入力とし、前記光ファイバケーブルの前記長さに対する位置固有の所定の閾値を決定する、請求項1に記載の方法。
- 前記警報の発生手順は、DFOSのウォーターフォールプロットのストリームを入力とし、前記ウォーターフォールプロットに対して画像二値化を実行し、二値化プロットに対して空間的・時間的フィルタリングを実行し、フィルタリングされたプロットにスコアを付けて、前記アラームを生成するかどうかを決定する、請求項4に記載の方法。
- 前記ウォーターフォールプロットは、スライディングタイムウィンドウに基づくスナップショットとして提供される、請求項5に記載の方法。
- 異常スコアメトリックが、各時間ウィンドウ内の各光ファイバケーブル点における白色画素の総数として決定される、請求項6に記載の方法。
- 前記光ファイバケーブルの前記長さの全ての光ファイバケーブル位置に対して、前記ウォーターフォールプロットに位置固有のカットオフポイントを適用することをさらに含む、請求項5に記載の方法。
- 異常スコアが、画像からの異常画素の総数として決定される、請求項7に記載の方法。
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US202063069802P | 2020-08-25 | 2020-08-25 | |
US63/069,802 | 2020-08-25 | ||
US202163140985P | 2021-01-25 | 2021-01-25 | |
US63/140,985 | 2021-01-25 | ||
US17/410,820 US20220065690A1 (en) | 2020-08-25 | 2021-08-24 | Statistical image processing-based anomaly detection system for cable cut prevention |
US17/410,820 | 2021-08-24 | ||
PCT/US2021/047623 WO2022046951A1 (en) | 2020-08-25 | 2021-08-25 | Statistical image processing-based anomaly detection for cable cut prevention |
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JP2023538474A true JP2023538474A (ja) | 2023-09-08 |
JP7471470B2 JP7471470B2 (ja) | 2024-04-19 |
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US (1) | US20220065690A1 (ja) |
JP (1) | JP7471470B2 (ja) |
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WO2024081412A1 (en) * | 2022-10-14 | 2024-04-18 | Network Integrity Systems, Inc. | Monitoring optical fibers |
US20240125671A1 (en) * | 2022-10-14 | 2024-04-18 | Network Integrity Systems, Inc. | Monitoring optical fibers with false alarm suppression using dissimilar algorithms |
US20240125641A1 (en) * | 2022-10-14 | 2024-04-18 | Network Integrity Systems, Inc. | Monitoring optical fibers using two dissimilar algorithms on a single monitoring system |
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JP2000182158A (ja) | 1998-10-09 | 2000-06-30 | Furukawa Electric Co Ltd:The | 侵入検知システム |
JP2001221684A (ja) | 2000-02-08 | 2001-08-17 | Fujikura Ltd | 光ファイバケーブルを用いた振動検出判定方法及び振動検出判定装置並びに振動検出判定システム |
JP2007232515A (ja) * | 2006-02-28 | 2007-09-13 | Fujikura Ltd | 光ファイバ振動検知システム |
GB201413242D0 (en) * | 2014-07-25 | 2014-09-10 | Fotech Solutions Ltd | Distributed Optical Fibre Sensors |
US10650648B2 (en) * | 2016-09-08 | 2020-05-12 | Mark Andrew Englund | Method and system for distributed acoustic sensing |
SG10202104872UA (en) | 2016-11-10 | 2021-06-29 | Fiber Sense Pty Ltd | Acoustic method and system for providing digital data |
AU2018303340A1 (en) | 2017-07-18 | 2020-03-05 | Fiber Sense Limited | Method and system for distributed acoustic sensing in a marine environment |
CN107490429A (zh) * | 2017-07-21 | 2017-12-19 | 国网上海市电力公司 | 一种地埋电缆防误开挖预警装置 |
CN107425906B (zh) * | 2017-07-25 | 2019-09-27 | 电子科技大学 | 面向地下管网安全监测的分布式光纤传感信号处理方法 |
US10914646B2 (en) | 2017-09-11 | 2021-02-09 | Optilab, Llc | System and method for monitoring the health of structures and machines using fiber Bragg Grating (FBG) |
WO2019136556A1 (en) * | 2018-01-10 | 2019-07-18 | Hifi Engineering Inc. | Method and system for detecting events in a conduit |
US10558207B1 (en) * | 2019-04-11 | 2020-02-11 | Sas Institute Inc. | Event monitoring system |
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