JP2011520091A - 渦電流プローブの応答値を補正する方法 - Google Patents
渦電流プローブの応答値を補正する方法 Download PDFInfo
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- JP2011520091A JP2011520091A JP2010540223A JP2010540223A JP2011520091A JP 2011520091 A JP2011520091 A JP 2011520091A JP 2010540223 A JP2010540223 A JP 2010540223A JP 2010540223 A JP2010540223 A JP 2010540223A JP 2011520091 A JP2011520091 A JP 2011520091A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/904—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents with two or more sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9046—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
【選択図】図1
Description
Claims (20)
- 渦電流アレイプローブ(ECAP)を使用して構成部品を検査する方法であって、
前記ECAPを用いて前記構成部品の表面をスキャンするステップと、
前記ECAPを用いて複数の部分的欠陥応答値を収集するステップと、
前記複数の部分的欠陥応答値をプロセッサに伝送するステップと、
前記ECAPのエレメントの構成および前記エレメントの解像度の少なくとも1つに基づいて、前記複数の部分的欠陥応答値を数学関数として表すステップと、
前記複数の部分的欠陥応答値から単一の最大欠陥応答値を導出するステップとを含む方法。 - 前記単一の最大欠陥応答値に基づいて欠陥の概略長さを求めるステップをさらに含む、請求項1記載の方法。
- 単一の最大欠陥応答値を導出するステップが、単一の最大欠陥応答値または欠陥の概略長さを得るために、ルックアップテーブルを使用することなく前記複数の部分的欠陥応答値を補正するステップをさらに含む、請求項1記載の方法。
- 単一の最大欠陥応答値を導出するステップが、該単一の最大欠陥応答値を導出するために平方の和の平方(SQSS)補正技法を使用するステップであって、下記の式、すなわち、
- 単一の最大欠陥応答値を導出するステップが、該単一の最大欠陥応答値を導出するために可変位相補正技法を使用するステップであって、以下の式、すなわち、
- 前記ECAPによって検出された欠陥の向きを推定するステップをさらに含む、請求項1記載の方法。
- 欠陥の向きを推定するステップが、
全方向性ECAPを使用してECAP画像を取得するステップと、
前記取得したECAP画像からAスキャンを取り出すステップと、
前記Aスキャンの顕著なピークの間隔を求めるステップと、
前記顕著なピークの間隔に基づいて欠陥の角度を計算するステップと
を含む、請求項6記載の方法。 - 前記推定された欠陥の向きに基づいて、最大ピーク・トゥ・ピーク電圧補正技法および平均ピーク・トゥ・ピーク電圧補正技法の少なくとも1つを前記複数の部分的欠陥応答値に適用するステップをさらに含む、請求項6記載の方法。
- 前記複数の部分的欠陥応答値から単一の最大欠陥応答値を導出するステップが、前記欠陥の向きが、前記ECAPに対して、半径方向/軸方向の向きより円周方向の向きに近いと推定されたとき、前記ECAP画像の最大ピーク・トゥ・ピーク電圧を解析するステップをさらに含む、請求項6記載の方法。
- 前記複数の部分的欠陥応答値から単一の最大欠陥応答値を導出するステップが、前記欠陥の向きが、前記ECAPに対して、円周方向の向きより半径方向/軸方向の向きに近いと推定されたとき、前記ECAP画像の平均ピーク・トゥ・ピーク電圧を解析するステップをさらに含む、請求項6記載の方法。
- 渦電流アレイプローブ(ECAP)によって検出された欠陥の長さを推定する方法であって、
前記ECAPのエレメントの構成および前記エレメントの解像度の少なくとも1つに基づいて、前記ECAPから受け取った複数の部分的欠陥応答値を数学関数として表すステップと、
単一の最大欠陥応答値を導出するために、前記複数の部分的欠陥応答値に補正技法を適用するステップと、
前記単一の最大欠陥応答値に基づいて前記欠陥の推定長さを求めるステップと
を含む方法。 - 構成部品の非破壊検査用のシステムであって、前記構成部品の表面および/またはその内部の欠陥の存在を検出し、少なくとも1つの欠陥の長さを推定するように構成されたシステムにおいて、
前記構成部品の渦電流(EC)画像を生成するように構成されたECプローブと、
前記ECプローブに結合されたプロセッサであって、前記ECプローブから前記EC画像を受け取り、単一の最大欠陥応答値を得るように構成されたプロセッサと
を備えるシステム。 - 前記プロセッサが、前記単一の最大欠陥応答値に基づいて、検出された欠陥の推定長さを求めるようにさらに構成されている、請求項12記載のシステム。
- 前記プロセッサが、前記単一の最大欠陥応答値または概略欠陥長さを得るために、ルックアップテーブルを用いることなく、少なくとも1つの補正技法を前記EC画像に適用して、前記単一の最大欠陥応答値を得るように構成されている、請求項13記載のシステム。
- 前記プロセッサが、平方の和の平方(SQSS)補正技法を適用するように構成され、単一の最大欠陥応答値が、以下の式、すなわち、
- 前記プロセッサが、可変位相補正技法を適用するように構成され、単一の最大欠陥応答値が、以下の式、すなわち、
- 前記ECプローブが、外部感知式(ES)渦電流アレイプローブ(ECAP)、長標準プローブ式(LSP) ECAP、および全方向性ECAPの少なくとも1つを備える、請求項12記載のシステム。
- 前記プロセッサが、前記ECAPによって検出された欠陥の向きを、
全方向性ECAPから受け取った前記EC画像からAスキャンを取り出すステップと、
前記Aスキャンの顕著なピークの間隔を求めるステップと、
前記顕著なピークの間隔を用いて欠陥の角度を計算するステップと
によって推定するように構成されている、請求項17記載のシステム。 - 前記プロセッサが、前記推定された欠陥の向きに基づいて、最大ピーク・トゥ・ピーク電圧補正技法および平均ピーク・トゥ・ピーク電圧補正技法の少なくとも1つを前記複数の部分的欠陥応答値に適用するようにさらに構成されている、請求項17記載のシステム。
- 前記プロセッサが、補正技法を適用して、前記ECAP画像の最大ピーク・トゥ・ピーク電圧および前記ECAP画像の平均ピーク・トゥ・ピーク電圧の少なくとも1つを解析することによって前記単一の最大欠陥応答値を導出するようにさらに構成されており、前記最大電圧および前記平均電圧のレベルが前記推定された欠陥の向きによって決定される、請求項17記載のシステム。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IN2007/000622 WO2009083996A2 (en) | 2007-12-31 | 2007-12-31 | Method for compensation of responses from eddy current probes |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2011520091A true JP2011520091A (ja) | 2011-07-14 |
Family
ID=40824826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010540223A Pending JP2011520091A (ja) | 2007-12-31 | 2007-12-31 | 渦電流プローブの応答値を補正する方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20110004452A1 (ja) |
JP (1) | JP2011520091A (ja) |
CA (1) | CA2711168A1 (ja) |
DE (1) | DE112007003750T5 (ja) |
GB (1) | GB2468098B (ja) |
WO (1) | WO2009083996A2 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6506122B2 (ja) * | 2015-07-09 | 2019-04-24 | 株式会社日立ハイテクノロジーズ | レール検査装置、および、レール検査システム |
CN111812195B (zh) * | 2020-07-31 | 2022-03-04 | 江南大学 | 一种对涡流检测得到的管道缺陷进行周向角度分类的方法 |
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Also Published As
Publication number | Publication date |
---|---|
WO2009083996A3 (en) | 2016-06-09 |
CA2711168A1 (en) | 2009-07-09 |
GB201011337D0 (en) | 2010-08-18 |
US20110004452A1 (en) | 2011-01-06 |
WO2009083996A2 (en) | 2009-07-09 |
GB2468098A (en) | 2010-08-25 |
DE112007003750T5 (de) | 2011-02-17 |
GB2468098B (en) | 2012-03-07 |
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