English
Ciência_Iscte
Publicações
Descrição Detalhada da Publicação
Liftoff correction based on the spatial spectral behavior of eddy-current images
Título Revista
IEEE Transactions on Instrumentation and Measurement
Ano (publicação definitiva)
2010
Língua
Inglês
País
Estados Unidos da América
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Abstract/Resumo
In this paper, a new processing scheme for compensating the liftoff effect is proposed to increase the signal-to-noise ratio of measurements carried out when a duralumin plate with artificially manufactured defects was scanned with eddy-current probes. The mathematical algorithm is based on the spatial frequency behavior of the output signals with the liftoff distance (the distance between the probe used for inspection and the sample) and its equivalent form (deconvolution) in the spatial domain. Results are presented for measurements performed at three different distances for the same defect of the duralumin plate.
Agradecimentos/Acknowledgements
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Palavras-chave
Eddy currents,Giant magnetoresistance,Liftoff effect,Nondestructive testing,Spectral analysis
Classificação Fields of Science and Technology
- Ciências Físicas - Ciências Naturais
- Outras Engenharias e Tecnologias - Engenharia e Tecnologia
- Engenharia Eletrotécnica, Eletrónica e Informática - Engenharia e Tecnologia
