Artículos de revistas
Ultrasonic Lamb waves detection using an unstabilized optical interferometer with uncalibrated phase shifts
Fecha
2014-11Registro en:
Perez Quintian, Luis Fernando; Alvarez, Natalia Clara; Garea, María Teresa; Ultrasonic Lamb waves detection using an unstabilized optical interferometer with uncalibrated phase shifts; Taylor & Francis; Journal of Modern Optics; 62; 7; 11-2014; 556-559
0950-0340
CONICET Digital
CONICET
Autor
Alvarez, Natalia Clara
Garea, María Teresa
Perez Quintian, Luis Fernando
Resumen
We present an experimental and post-processing scheme that allows ultrasound surface wave detection by means of an unstabilized homodyne interferometric technique. We register interference signals for a set of uncalibrated phase shifts and, from them, we are able to retrieve the normal surface displacement of a thin aluminium plate. The results obtained with this technique are then compared to robust and more traditional phase recovery methods such as the Carré algorithm and the 11-step windowed discrete Fourier transform algorithm. For both algorithms, we found a correlation superior to 99.9%, when compared to the results of the proposed technique. This non-destructive testing scheme represents a simpler and less-expensive alternative to other existing laser ultrasonic techniques.