Vibration Analyses of a Gantry Structure by Mobile Phone Digital Image Correlation and Interferometric Radar

The study presents results from applying the Real Aperture Radar interferometry technique and Digital Image Correlation through a mobile phone camera to identify static dynamic deformations of gantry during surveying operations on Michelangelo’s David at Galleria dell’Accademia di Firenze Museum in Florence. statue has considerable size reaches an elevation more than seven meters its pedestal. An ad-hoc was designed deployed, given cramped operating area around statue. scanner had stability control system that forbid instrument movements. However, considering unicity survey rare occurrence, previous been carried out year 2000; verifying recording is crucial task, necessary for validation. As does not have on-board sensor, hi-survey accuracy requested, redundant, contactless, remote monitoring chosen guarantee maximum freedom movement avoid any interference scanning operations. Thanks TInRAR technique, were monitored with 0.01 mm. At same time, analysis performed gantry, which can be considered Multi-Degree-Of-Freedom (MDOF) system, accurately calculate vibration frequency amplitude. A comparison between DIC reported substantial accordance detecting gantry’s oscillating frequencies; predominant oscillation 1.33 Hz identified structure by TinSAR analysis.