JP6243225B2 - サーモグラフ試験方法及びこの試験方法を実行するための試験装置 - Google Patents
サーモグラフ試験方法及びこの試験方法を実行するための試験装置 Download PDFInfo
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Description
欠陥により影響を受けた欠陥領域と欠陥がない試験片の材料との間に熱的不均衡を生じさせるように試験対象の部分を加熱するための加熱装置と、
ある時間間隔で連続する少なくとも2つの一連のサーモグラフ画像を記録するための少なくとも1つの記録装置と、
サーモグラフ画像のサーモグラフ・データを評価するための評価装置と、
を含み、
この評価装置は、温度プロファイルにより記録された測定領域の多数の測定位置について温度プロファイルからの温度値の経時的変化を特定するため、かつ、測定領域における熱流を特徴付ける少なくとも1つの評価基準に基づいて経時的変化を評価するために、サーモグラフ画像から位置的に適正に割り当てられた温度プロファイルを特定するよう構成される。
110:誘導加熱装置
112:誘導コイル
115:交流発電機
120:局所解像記録装置、熱感知カメラ
122:記録領域
124:測定線
125:ストリップ
128、128’、128”:画像詳細
130:制御装置
140:表示及び操作ユニット
150:速度測定装置
160:加湿装置
170:マーキング装置
182:長手方向軸
184:移動方向
185:試験片の表面
188:欠陥
Claims (8)
- 試験対象の表面付近の欠陥の局所的解像検知及び識別のためのサーモグラフ試験方法であって、
欠陥により影響を受ける欠陥領域と欠陥がない前記試験対象の材料との間に熱的不均衡を生じさせ、欠陥領域の欠陥がない周辺領域は加熱されないか又は前記欠陥領域より強く加熱されないように、前記試験対象の部分を加熱するステップと、
各々がサーモグラフ画像により記録された前記試験対象の表面領域における局所温度分布を表す、横方向の熱流が前記局所的に加熱された欠陥領域から、横方向に前記欠陥領域の前記周辺領域に流れたことが明らかになったときに始まる熱伝播段階内にある時間間隔で連続する一連のサーモグラフ画像を記録するステップと、
前記サーモグラフ画像から、局所解像プロファイルである位置的に適正に割り当てられた温度プロファイルを特定するステップと、
を含み、前記温度プロファイルにおける異なる位置は、前記それぞれの位置において前記温度を表す測定された変数の値をそれぞれ割り当てられ、各々の位置的に適正に割り当てられた温度プロファイルは、前記試験対象の前記表面の前記同じ測定領域に割り当てられ、さらに、
前記温度プロファイルによって記録される前記測定領域の多数の測定地点について前記温度プロファイルから温度値の経時的変化を求めるステップと、
前記測定領域における前記横方向の熱流を特徴付ける少なくとも1つの評価基準に基づいて前記経時的変化を評価するステップと、
を含み、
前記評価において、前記温度プロファイル内の前記温度値の少なくとも1つの局所最大を探索し、
前記評価において、前記温度プロファイル内の前記温度値の局所最大の前記領域における熱容積濃度値を求め、熱容積濃度値の経時的変化を評価し、
前記熱容積濃度値は、隣接する周辺領域と比較した、直接局所温度最大における熱量の比率の尺度であることを特徴とするサーモグラフ試験方法。 - 前記評価において、前記熱容積濃度値の経時的変化を評価することに加えて、前記局所最大の前記領域における温度値の前記振幅の経時的変化を評価することを特徴とする、請求項1に記載のサーモグラフ試験方法。
- 前記評価において、少なくとも3、好ましくは4から20までの、位置的に適正に割り当てられた温度プロファイルを一緒に評価することを特徴とする、請求項1から請求項2のいずれかに記載のサーモグラフ試験方法。
- 細長い試験対象を試験するために、前記試験対象と好ましくは前記試験対象の長手方向に対して平行に延びる移動方向に前記サーモグラフ画像を記録するための記録装置との間に相対運動が生成され、前記サーモグラフ画像により記録された前記表面領域は前記運動方向に対してオフセットされ、直接連続して記録されたサーモグラフ画像の前記表面領域は、好ましくは重なり領域において重なることを特徴とする、請求項1から請求項3のいずれかに記載のサーモグラフ試験方法。
- 前記記録装置は、静止形態で設けられ、前記細長い試験対象は前記記録装置に対して移動されることを特徴とする、請求項4に記載のサーモグラフ試験方法。
- 欠陥らしい異常を有する表面詳細を含有する、少なくとも第1の見つけ出された画像詳細の識別のために一連のサーモグラフ画像から、第1の時点において記録された第1のサーモグラフ画像を分析するステップと、
前記第1のサーモグラフ画像からある時間間隔をおいた後の第2の時点において記録された第2のサーモグラフ画像において、前記第1の画像詳細に対応する第2の画像詳細を自動的に見つけるステップと、
を含み、
前記第1の画像詳細及び前記第2の画像詳細は、欠陥らしい異常を特定するために、前記温度プロファイル内の前記温度値の局所最大を探索することで見つけ出されることを特徴とする、請求項4から請求項5のいずれかに記載のサーモグラフ試験方法。 - 自動探索のために、前記第2のサーモグラフ画像において前記欠陥らしい異常を含有する前記表面詳細の予想される位置が、前記試験対象と前記記録装置との間の相対速度、前記運動の方向、及び前記第1の時点と前記第2の時点との間で経過した前記時間に基づいて特定され、好ましくは、前記相対速度、特に前記試験対象の前記速度が測定されることを特徴とする請求項4、請求項5又は請求項6に記載のサーモグラフ試験方法。
- 試験対象の表面付近の欠陥の局所的解像検知及び識別のためのサーモグラフ試験装置であって、
欠陥により影響を受ける欠陥領域と欠陥がない前記試験対象の材料との間に熱的不均衡を生じさせ、欠陥領域の欠陥がない周辺領域は加熱されないか又は前記欠陥領域より強く加熱されないように、前記試験対象(180)の部分を加熱するための加熱装置(120)と、
ある時間間隔で連続する一連の少なくとも2つのサーモグラフ画像を記録するための少なくとも1つの記録装置(120)と、
前記サーモグラフ画像のサーモグラフ・データを評価するための評価装置と、
を含み、
前記試験装置は、請求項1から請求項7のいずれかに記載の前記方法を実行するように構成されることを特徴とするサーモグラフ試験装置。
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EP10003756.3 | 2010-04-08 | ||
EP10003756.3A EP2375243B1 (de) | 2010-04-08 | 2010-04-08 | Thermografisches Prüfverfahren und Prüfvorrichtung zur Durchführung des Prüfverfahrens |
PCT/EP2011/055386 WO2011124628A1 (de) | 2010-04-08 | 2011-04-07 | Thermografisches prüfverfahren und prüfvorrichtung zur durchführung des prüfverfahrens |
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US (1) | US9194831B2 (ja) |
EP (1) | EP2375243B1 (ja) |
JP (2) | JP6243225B2 (ja) |
KR (1) | KR101757019B1 (ja) |
CN (1) | CN102947695B (ja) |
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CA (1) | CA2794119C (ja) |
ES (1) | ES2953887T3 (ja) |
MX (1) | MX2012011507A (ja) |
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ZA201207096B (en) | 2013-05-29 |
ES2953887T3 (es) | 2023-11-16 |
CA2794119C (en) | 2018-01-02 |
UA111328C2 (uk) | 2016-04-25 |
BR112012025659B1 (pt) | 2020-04-07 |
KR101757019B1 (ko) | 2017-07-26 |
WO2011124628A1 (de) | 2011-10-13 |
EP2375243B1 (de) | 2023-06-07 |
MX2012011507A (es) | 2013-02-27 |
CN102947695A (zh) | 2013-02-27 |
CN102947695B (zh) | 2015-07-22 |
JP2016128842A (ja) | 2016-07-14 |
RU2549913C2 (ru) | 2015-05-10 |
US20130077650A1 (en) | 2013-03-28 |
KR20130043105A (ko) | 2013-04-29 |
BR112012025659A2 (pt) | 2016-06-28 |
RU2012145236A (ru) | 2014-05-20 |
US9194831B2 (en) | 2015-11-24 |
JP2013524229A (ja) | 2013-06-17 |
EP2375243C0 (de) | 2023-06-07 |
EP2375243A1 (de) | 2011-10-12 |
CA2794119A1 (en) | 2011-10-13 |
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