JP7216884B2 - 反射波の評価方法 - Google Patents
反射波の評価方法 Download PDFInfo
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- JP7216884B2 JP7216884B2 JP2019036059A JP2019036059A JP7216884B2 JP 7216884 B2 JP7216884 B2 JP 7216884B2 JP 2019036059 A JP2019036059 A JP 2019036059A JP 2019036059 A JP2019036059 A JP 2019036059A JP 7216884 B2 JP7216884 B2 JP 7216884B2
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- 238000011156 evaluation Methods 0.000 title claims description 32
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- 230000005540 biological transmission Effects 0.000 claims description 23
- 230000001902 propagating effect Effects 0.000 claims description 5
- 238000012360 testing method Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
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- 238000009434 installation Methods 0.000 description 3
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- 238000009933 burial Methods 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
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- 239000002689 soil Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
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- 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
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
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- 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
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0654—Imaging
- G01N29/069—Defect imaging, localisation and sizing using, e.g. time of flight diffraction [TOFD], synthetic aperture focusing technique [SAFT], Amplituden-Laufzeit-Ortskurven [ALOK] technique
-
- 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
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
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- 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
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4463—Signal correction, e.g. distance amplitude correction [DAC], distance gain size [DGS], noise filtering
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- 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
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/48—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by amplitude comparison
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- 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
- G01N2291/02854—Length, thickness
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- 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
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0422—Shear waves, transverse waves, horizontally polarised waves
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- 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
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
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- 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
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Engineering & Computer Science (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
本発明の実施形態に係る反射波の評価方法を実際に用いた具体例について説明する。図2は、本実施形態の反射波の評価方法を長尺物の評価に用いる様子を模式的に示す図である。
2:地表面
10:支線アンカーのロッド部(長尺物)
10a:上端
10b:底面(基準となる特定部位)
20:送信プローブ
30:受信プローブ
α0:長尺物が健全かつ埋設(設置)前の状態における弾性波の減衰率
α1:長尺物が埋設された部分における弾性波の減衰率
β0:長尺物の基準となる特定部位での弾性波の反射係数
β1:検出したい欠陥の反射係数
At:受信プローブで受信した弾性波の送信波振幅
Ar:受信プローブで受信した弾性波の特定部位からの反射波振幅
Claims (3)
- 長尺物において、前記長尺物の長手方向に伝播する弾性波を送信し、該弾性波の反射波を受信することで前記長尺物の欠陥の大きさを評価する反射波の評価方法であって、
前記弾性波の送信波振幅と前記長尺物の基準となる特定部位からの1回目の反射波振幅から前記長尺物が設置された環境に依拠する前記弾性波の減衰率を求め、該減衰率を用いて前記弾性波の距離振幅特性曲線を作成し、該距離振幅特性曲線と前記反射波振幅を比較することで前記欠陥の大きさを評価し、
前記減衰率は、
前記弾性波の送信波振幅、前記長尺物の埋設されていない部分における前記弾性波の減衰率、前記特定部位での前記弾性波の反射係数、前記特定部位から反射して来る前記反射波振幅、前記長尺物の埋設されていない部分の長さ、及び前記長尺物の埋設された部分の長さに基づいて求められる
反射波の評価方法。 - 長尺物において、前記長尺物の長手方向に伝播する弾性波を送信し、該弾性波の反射波を受信することで前記長尺物の欠陥の大きさを評価する反射波の評価方法であって、
前記弾性波の送信波振幅と前記長尺物の基準となる特定部位からの1回目の反射波振幅から前記長尺物が設置された環境に依拠する前記弾性波の減衰率を求め、該減衰率を用いて前記弾性波の距離振幅特性曲線を作成し、該距離振幅特性曲線と前記反射波振幅を比較することで前記欠陥の大きさを評価し、
前記弾性波を送信する送信プローブと、反射波を受信する受信プローブを備え、前記送信プローブは前記長尺物の埋設されていない部分の手前側に、前記受信プローブは前記長尺物の埋設されていない部分の奥側に、前記送信プローブと前記受信プローブとが所定の間隔を空けて配置される
反射波の評価方法。 - 前記距離振幅特性曲線は、
検出したい前記欠陥の前記弾性波に対する反射係数に基づいて作成される
ことを特徴とする請求項1又は2に記載の反射波の評価方法。
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JP2019036059A JP7216884B2 (ja) | 2019-02-28 | 2019-02-28 | 反射波の評価方法 |
US17/432,188 US20220170888A1 (en) | 2019-02-28 | 2020-02-14 | Evaluation Method for Reflected Wave |
PCT/JP2020/005758 WO2020175182A1 (ja) | 2019-02-28 | 2020-02-14 | 反射波の評価方法 |
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JP2019036059A JP7216884B2 (ja) | 2019-02-28 | 2019-02-28 | 反射波の評価方法 |
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JP2020139855A JP2020139855A (ja) | 2020-09-03 |
JP7216884B2 true JP7216884B2 (ja) | 2023-02-02 |
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JP (1) | JP7216884B2 (ja) |
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Families Citing this family (3)
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US11240069B2 (en) | 2020-01-31 | 2022-02-01 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Communication device, information processing method, and storage medium |
CN112924548B (zh) * | 2020-12-25 | 2022-07-12 | 广东电网有限责任公司电力科学研究院 | 一种电缆附件橡胶件的超声探伤方法及系统 |
US11933765B2 (en) * | 2021-02-05 | 2024-03-19 | Evident Canada, Inc. | Ultrasound inspection techniques for detecting a flaw in a test object |
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2019
- 2019-02-28 JP JP2019036059A patent/JP7216884B2/ja active Active
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2020
- 2020-02-14 WO PCT/JP2020/005758 patent/WO2020175182A1/ja active Application Filing
- 2020-02-14 US US17/432,188 patent/US20220170888A1/en active Pending
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US9176108B2 (en) | 2012-07-26 | 2015-11-03 | Southwest Research Institute | Method and device for measuring corrosion metal loss |
JP2015102405A (ja) | 2013-11-25 | 2015-06-04 | 日本電信電話株式会社 | 検査方法および検査装置 |
CN108680643A (zh) | 2018-03-29 | 2018-10-19 | 东莞理工学院 | 一种新式超声导波检测方法 |
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US20220170888A1 (en) | 2022-06-02 |
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