Langkemper Ralph, Moser Stefan, Büttner Markus, Rakus Dominik, Sättler Axel, Nau Siegfried
Fraunhofer Institute for High-Speed Dynamics, Ernst-Mach-Institut, EMI, Ernst-Zermelo-Straße 4, 79104 Freiburg, Germany.
J Imaging. 2022 Jan 28;8(2):28. doi: 10.3390/jimaging8020028.
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.
本文表明，医学领域已知的利用先验信息的X射线分析方法，相较于高速实验中的常规分析，能够提供更多信息。借助二维X射线图像对已知三维形状进行空间配准，可以得出被检查部件的空间位置和方向。该方法通过次口径弹药弹托抛射的实例进行了演示。被检查物体的速度高达1600米/秒。作为先验信息，使用了实验装置的几何结构以及弹丸和弹托部件的形状。该装置包括四个不同的位置或时间点，以研究随时间的行为。能够将部件放置在空间精度为0.85毫米（标准偏差）的范围内，在此范围内95%的误差分别为1.7毫米。误差主要受实验装置的精度以及X射线图像上特征点的标记影响。
