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Proceedings Paper

Dynamic displacement measurement of Low-E membrane reactor by PSD based on laser-triangulation method
Author(s): Baoqiang Li; Tiegen Liu; Yao Zhang
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Paper Abstract

During the production of Low-E (Low-Emission) glass, the distance between Low-E membrane reactor and the float glass impacts the thickness of Low-E membrane coated, and the quality of products. The system, designed to measure the displacement of the reactor, which represents the distance between Low-E membrane reactor and the float glass, will work in the industrial condition of high temperature and strong interference. On the consideration of non-contact, noninvasive and high-speed, a measure system by PSD (Position Sensitive Detector) based on Laser-Triangulation method is designed and a prototype made. In this system, a laser beam, generated by a semiconductor laser generator, focuses on the underside surface of the Low-E membrane reactor made of graphite. And then, the laser spot on the underside surface, through a small focus lens, is detected by a 1D-PSD (One-Dimension Detector). The electric signal, reflecting the position of the small laser spot on the PSD, is amplified and processed by amplifier and signal processing circuit, then is sampled by a A/D converter. Based on the Laser-Triangulation method, the displacement can be computed. Trial shows, the system based on Laser-Triangulation method meets the requirements of high-speed, noninvasive, non-contact, and to some extent diminishes the influence of nonlinearity and dark current of the PSD.

Paper Details

Date Published: 24 January 2008
PDF: 8 pages
Proc. SPIE 6829, Advanced Materials and Devices for Sensing and Imaging III, 68291N (24 January 2008); doi: 10.1117/12.757287
Show Author Affiliations
Baoqiang Li, Tianjin Univ. (China)
Tiegen Liu, Tianjin Univ. (China)
Yao Zhang, Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 6829:
Advanced Materials and Devices for Sensing and Imaging III
Anbo Wang; Yimo Zhang; Yukihiro Ishii, Editor(s)

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