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Theses/Dissertations

Communications and signal processing

1992

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Full-Text Articles in Engineering

Three-Dimensional Flaw Reconstruction Using A Real-Time X-Ray Imaging System , Edward Raymond Doering Jan 1992

Three-Dimensional Flaw Reconstruction Using A Real-Time X-Ray Imaging System , Edward Raymond Doering

Retrospective Theses and Dissertations

A system has been developed for making three-dimensional flaw measurements in materials using a real-time X-ray imaging laboratory. This environment affords precise control over all positional variables, offers multiple degrees of freedom for sample movement, and the continuous nature of the real-time image eliminates ambiguity in determining correspondence points among multiple views of the sample. This system is based on film stereography in which two stereo projections are obtained of a sample either by translating the X-ray source or by translating the sample. The three-dimensional coordinates of features of interest such as crack endpoints and centroids of void-like flaws are ...