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Proceedings Paper

Inner profile measurement of pipes and holes using a ring beam device
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Paper Abstract

Many trials have been proposed to measure inner diameter of pipes and/or holes. However most of them are classified into contact methods with any kind of stylus. Here we propose to measure inner diameter and profile of pipes using a ring beam device which consists of a conical mirror. and LD. The beam from the LD is directed to the top of the conical mirror which is precisely fabricated in angle and polished so as to form a ring beam for optical sections of the inner wall. This optically sectioned profile is analyzed to calculate the inner diameter and/or profile. In addition to pipes such as water mains and sewers, engine blocks for automobiles are tested to measure the inner size of cylinders and to find defects of inner surfaces.

Paper Details

Date Published: 12 October 2006
PDF: 6 pages
Proc. SPIE 6382, Two- and Three-Dimensional Methods for Inspection and Metrology IV, 63820D (12 October 2006); doi: 10.1117/12.689317
Show Author Affiliations
Toru Yoshizawa, Saitama Medical Univ. (Japan)
Masayuki Yamamoto, Softron Corp. (Japan)
Toshitaka Wakayama, Saitama Medical University (Japan)


Published in SPIE Proceedings Vol. 6382:
Two- and Three-Dimensional Methods for Inspection and Metrology IV
Peisen S. Huang, Editor(s)

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