AUTOMATIC INSPECTION OF DRILL-HOLES AND THREADS
C. Eitzinger, J. Kastner
Abstract:
Due to the cylindrical shape of drill-holes and inner threads the acquisition of high-resolution images has not yet been solved satisfactorily. Different possibilities for taking pictures from the inside of a drilled hole are reviewed and evaluated with respect to the quality of the images. Results show, that a ring-shaped CMOS-Sensor works best for the purpose of automatic inspection.
Additionally, the analysis of these images requires a special algorithmic approach, which is able to take care of the cylindrial shape of the object. To achieve this, the use of the Z-transformation is recommended for processing of such images, and it is shown to be superior to other image processing operators.
Keywords:
automatic inspection, inner threads, technical diagnostic
Download:
IMEKO-WC-2000-TC14-P365.pdf
DOI:
-
Event details
Event name:
XVI IMEKO World Congress
Title:

Measurement - Supports Science - Improves Technology - Protects Environment ... and Provides Employment - Now and in the Future

Place:
Vienna, AUSTRIA
Time:
25 September 2000 - 28 September 2000
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