An array-based leak location sensor has been developed and improved for application onboard spacecraft. Introduction of a diced piezoelectric element has permitted the successful utilization of lower frequency bands to perform the location. With this new device location across five integral stiffeners has been demonstrated, despite the stiffeners' strong frequency-dependent scattering. The approach uses spatial Fourier transformation of wideband plate wave signals to determine the direction of signal propagation, independent of the effects of dispersive multiple mode signal transport. The robustness of the measurement has been demonstrated, even across as many as five integral stiffeners. The results of an computational model of stiffener transmission supports the conclusions reached in the experimental results.
Leak location in spacecraft skin with ultrasonic arrays
Leckortung in Raumfahrzeughüllen mit Ultraschallgruppenstrahlern
2008
8 Seiten, 8 Bilder, 6 Quellen
Conference paper
Storage medium
English
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