Development of CAT System to Evaluate
2-Dimensional Geometric Elements Using X-ray CT
Naoki ASAKAWA, Masatoshi IZAWA, Makoto OOTAKI and Yoshimi TAKEUCHI
Proceeding of the 4th JAPAN-FRANCE CONGRES
& 2nd ASIA-EUROPE CONGRESS on MECHATRONICS, Volume 1, pp.562-567.
(Kitakyushu, Fukuoka JAPAN, October 6-8, 1998)
This study deals with X-ray CT technology to inspect the inside of parts
without destroying them. At present, there is few software capable of
processing X-ray CT scanned data. Therefore, the function was developed
to treat the data to evaluate geometric elements, based on CAD data
as the standard of inspection. After the coordinate system of scanned data
is automatically related with that of CAD data, the system evaluates
geometric elements, for example, by the contour of workpiece as a cluster
of segments. For the evaluation, the system cuts the contour of CAD data
on the appointed cross-sectional plans and separates them to geometric
elements such as straight lines, circular arcs, and the others.
To compare CAD data with the X-ray CT scanned data, the system calculates
the straigtness and angle deviation from the direction vector of a straight
line, and the roundness and eccentricity of a circular arc. In addition,
the system offers a visualization interface to display them so that the users
utilize the evaluated result comfortably. As a result, the CAT system
is found effective to evaluate 2-dimensional geometric elements.
http://www.ims.mce.uec.ac.jp/
1998, by K.Morishige