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Proceedings Paper

Software solution to counting and subdivision of moire fringes with wide dynamic range
Author(s): Shaojing Su; Haibao Lu; Weihong Zhou; Gang Wang
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Paper Abstract

A kind of software solution is provided to implement counting and division of moire fringes in this paper. No complex electronic circuit of digital counter exists in the digital reader that adopts this software solution. The counting and division of the fringes are completed in DSP (digital signal processor), so it can solve the problems that counting circuit can't match the subdivision system properly by logical judgement. Because of utilizing high-speed optoelectronic convertor and flash sample technique, the system can process moire signal with wide frequency range. The example demonstrated in the paper can count and divide signals from DC to 1MHz, i.e., if the optical sensitivity of the signal is 1 fringe per micrometers , the fastest measure speed can reach 1000mm/s. The experimental result shows that the software solution has high accuracy and sound reliability.

Paper Details

Date Published: 10 October 2000
PDF: 5 pages
Proc. SPIE 4222, Process Control and Inspection for Industry, (10 October 2000); doi: 10.1117/12.403899
Show Author Affiliations
Shaojing Su, National Univ. of Defense Technology (China)
Haibao Lu, National Univ. of Defense Technology (China)
Weihong Zhou, National Univ. of Defense Technology (China)
Gang Wang, National Univ. of Defense Technology (China)

Published in SPIE Proceedings Vol. 4222:
Process Control and Inspection for Industry
Shulian Zhang; Wei Gao, Editor(s)

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