Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10071/7335
Autoria: | Postolache, O. Ribeiro, A. L. Ramos, H. G. |
Data: | Dez-2013 |
Título próprio: | GMR array uniform eddy current probe for defect detection in conductive specimens |
Volume: | 46 |
Número: | 10 |
Paginação: | 4369-4378 |
ISSN: | 0263-2241 |
Palavras-chave: | Non-destructive testing Uniform eddy current probe Giant magneto-resistance sensors array Sensor biasing 2D Template matching |
Resumo: | In this work an optimized uniform eddy current probe architecture including two planar excitation coils, a rectangular magnetic field biasing coil and a GMR magnetometer sensor array is presented. An ac current is applied to the planar spiral rectangular coil of the probe, while a set of GMR magnetometer sensors detects the induced magnetic field in the specimens under test. The rectangular coil provides the DC uniform magnetic field, assuring appropriate biasing of the GMR magnetometers of the probe, setting-up the functioning point on the linear region and at the same branch of the GMR static characteristics. The differences on the images obtained for the same specimen for each GMR are reduced if all sensors are biased on the same working point. Elements of the automated measurement system used to inspect the plate under test using the proposed eddy current probe, including a validation procedure based on a 2D template matching algorithm and the corresponding experimental results are included in the paper |
Arbitragem científica: | Sim |
Acesso: | Acesso Embargado |
Aparece nas coleções: | CTI-RI - Artigos em revistas científicas internacionais com arbitragem científica IT-RI - Artigos em revistas científicas internacionais com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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publisher_version_GMR vf.pdf Restricted Access | 307,63 kB | Adobe PDF | Ver/Abrir Request a copy |
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