A Priori Information Based Time-Resolved 3D Analysis of the Trajectory and Spatial Orientation of Fast-Moving Objects Using High-Speed Flash X-ray Imaging

Abstract

This paper shows that the X-ray analysis method known from the medical field, using a priori information, can provide a lot more information than the common analysis for high-speed experiments. Via spatial registration of known 3D shapes with the help of 2D X-ray images, it is possible to derive the spatial position and orientation of the examined parts. The method was demonstrated on the example of the sabot discard of a subcaliber projectile. The velocity of the examined object amounts up to 1600 m/s. As a priori information, the geometry of the experimental setup and the shape of the projectile and sabot parts were used. The setup includes four different positions or points in time to examine the behavior over time. It was possible to place the parts within a spatial accuracy of 0.85 mm (standard deviation), respectively 1.7 mm for 95% of the errors within this range. The error is mainly influenced by the accuracy of the experimental setup and the tagging of the feature points on the X-ray images.

X-ray Digital Radiography and Computed Tomography

“…Further topics covered in this Special Issue include the use of synchrotron light for phase-contrast and multi-contrast imaging [ 8 , 9 , 10 , 11 ] and analytical techniques, such as microscopic synchrotron X-ray fluorescence [ 12 ]. Several contributions deal with new performing algorithms developed for the suppression of cone-beam artifacts in CT images [ 13 ] and signal retrieval from non-sinusoidal intensity modulations in X-ray and neutron interferometry [ 14 ], or devoted to innovative techniques, such as multiscale holotomography [ 15 ], rotation-free dynamic multi-angle X-ray tomography [ 16 ] and high-speed X-ray imaging [ 17 ]. The last two research papers describe the implementation principles of a complete CT reconstruction toolchain [ 18 ] and the design and realization of a new furnace for in situ wettability experiments at high temperatures under X-ray microtomography [ 19 ].…”