19 January 1996 Optical integrated testing instrument for pipe interior parameter measurement and inspection
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Abstract
An instrument for fine-machined pipe (longer than 10 m) inspection and measurement is introduced in this paper. The non-contact interior wall roughness measurement system based on light reflecting and scattering theory has a wide range (Ra from 0.012 micrometer to 4 micrometer) and is suitable for different types of machined surface measurements. The interior diameter is measured by a pair of gratings which produce Moire fringes. The accuracy of which is better than 5 micrometer for a pipe diameter greater than 100 mm. A CCD video camera inspection system is also installed on the measuring head to check the interior wall quality.
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Jian Zhang, Bo Liu, Liying Wu, Liankui Sun, Hai Gong, "Optical integrated testing instrument for pipe interior parameter measurement and inspection", Proc. SPIE 2599, Three-Dimensional and Unconventional Imaging for Industrial Inspection and Metrology, (19 January 1996); doi: 10.1117/12.230401; https://doi.org/10.1117/12.230401
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