Precision Measurement of Small Gap within Closed Components by Industrial Computed Tomography

摘要

The signal of small gap less than 0.15mm in closed components, which can be observed clearly on industrial computed tomography (ICT) image, can't be distinguished because of the limitation of resolution. In this paper, zone edge integration and its corresponding mathematic model have been established. The relative expression between the gap width and its specific integration value has been achieved by experimental results. The precise measuring method for small gaps, from 0.01mm to 0.15mm, of Beryllium, Aluminium and Steel has been established and the Beryllium, Aluminium and Steel corresponding measuring results have been given out. When the credibility probability is 95%, the measuring uncertainty is better than ±0.005mm.