Reduction of lift-off effects for pulsed eddy current NDT
The lift-off effect is commonly known to be one of the main obstacles for effective eddy current {NDT} testing as it can easily mask defect signals. Pulsed eddy current techniques, which are believed to be potentially rich of information, are also sensitive to the effect. An approach using normalisa...
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| Format: | Article |
| Language: | English |
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Elsevier
2005
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| Online Access: | http://irep.iium.edu.my/46711/ http://irep.iium.edu.my/46711/ http://irep.iium.edu.my/46711/1/Reduction_of_lift-off_effects_for_pulsed.pdf |
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iium-46711 |
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eprints |
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iium-467112016-07-20T23:50:00Z http://irep.iium.edu.my/46711/ Reduction of lift-off effects for pulsed eddy current NDT Tian, Gui Yun Sophian, Ali TA165 Engineering instruments, meters, etc. Industrial instrumentation The lift-off effect is commonly known to be one of the main obstacles for effective eddy current {NDT} testing as it can easily mask defect signals. Pulsed eddy current techniques, which are believed to be potentially rich of information, are also sensitive to the effect. An approach using normalisation and two reference signals to reduce the lift-off problem with pulsed eddy current techniques is proposed. Experimental testing on the proposed technique and results are presented in this report. Results show that significant reduction in the effect has been achieved mainly in metal loss and sub-surface slot inspection. The technique can also be applied for measurement of metal thickness beneath non-conductive coatings, microstructure, strain/stress measurement, where the output is sensitive to the lift-off effect. Elsevier 2005 Article PeerReviewed application/pdf en http://irep.iium.edu.my/46711/1/Reduction_of_lift-off_effects_for_pulsed.pdf Tian, Gui Yun and Sophian, Ali (2005) Reduction of lift-off effects for pulsed eddy current NDT. NDT & E International , 38 (4). 319 - 324. ISSN 0963-8695 http://www.sciencedirect.com/science/article/pii/S0963869504001185 |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
International Islamic University Malaysia |
| building |
IIUM Repository |
| collection |
Online Access |
| language |
English |
| topic |
TA165 Engineering instruments, meters, etc. Industrial instrumentation |
| spellingShingle |
TA165 Engineering instruments, meters, etc. Industrial instrumentation Tian, Gui Yun Sophian, Ali Reduction of lift-off effects for pulsed eddy current NDT |
| description |
The lift-off effect is commonly known to be one of the main obstacles for effective eddy current {NDT} testing as it can easily mask defect signals. Pulsed eddy current techniques, which are believed to be potentially rich of information, are also sensitive to the effect. An approach using normalisation and two reference signals to reduce the lift-off problem with pulsed eddy current techniques is proposed. Experimental testing on the proposed technique and results are presented in this report. Results show that significant reduction in the effect has been achieved mainly in metal loss and sub-surface slot inspection. The technique can also be applied for measurement of metal thickness beneath non-conductive coatings, microstructure, strain/stress measurement, where the output is sensitive to the lift-off effect. |
| format |
Article |
| author |
Tian, Gui Yun Sophian, Ali |
| author_facet |
Tian, Gui Yun Sophian, Ali |
| author_sort |
Tian, Gui Yun |
| title |
Reduction of lift-off effects for pulsed eddy current NDT |
| title_short |
Reduction of lift-off effects for pulsed eddy current NDT |
| title_full |
Reduction of lift-off effects for pulsed eddy current NDT |
| title_fullStr |
Reduction of lift-off effects for pulsed eddy current NDT |
| title_full_unstemmed |
Reduction of lift-off effects for pulsed eddy current NDT |
| title_sort |
reduction of lift-off effects for pulsed eddy current ndt |
| publisher |
Elsevier |
| publishDate |
2005 |
| url |
http://irep.iium.edu.my/46711/ http://irep.iium.edu.my/46711/ http://irep.iium.edu.my/46711/1/Reduction_of_lift-off_effects_for_pulsed.pdf |
| first_indexed |
2023-09-18T21:06:29Z |
| last_indexed |
2023-09-18T21:06:29Z |
| _version_ |
1777410967785701376 |