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Synchronization errors in high-speed digital image correlation

Reu, Phillip L.; Miller, Timothy J.

The combination of digital image correlation (DIC) and new high and ultra-high speed digital imaging systems has yielded an extremely powerful tool for measuring the full-field results of explosively driven events. However, limitations in the hardware and the inherent difficulty of synchronizing camera clocks beyond a megahertz have raised questions about possible errors in the DIC results due to a lack of synchronization. This paper explores the synchronization of high-speed cameras experimentally and then uses synthetic images based on the range of experimental synchronization errors to calculate the expected 3D-DIC measurement errors. ©2009 Society for Experimental Mechanics Inc.