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Proceedings Paper

Laser-fiber sensor for measuring relative shift
Author(s): Junfu Ma; Yanbin Zhu
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Paper Abstract

A new type of laser-fiber sensor for measuring and monitoring a big size body (for example the rocket body) surface's relative shift, which is produced in a strong vibration system, has been studied. The laser-fiber sensor is a combination of laser, fiber, computer, etc. and has features of simple, quick, and high accuracy. The light of a semiconductor laser with a wavelength of (lambda) equals 780 nm passes through a 12 m long multi-mode fiber and an objective lens, then irradiates on the surface measured. Another objective lens collects the reflected light from the surface measured and images it on a 2048 charge coupled device (CCD), then a 286 computer processes the signal from the CCD. The sampling frequency of measuring data of this laser-fiber sensor is 800 Hz and its measuring accuracy is better than +/- 0.05 mm. The measuring range of relative shift is about +/- 15 mm. It has the ability to measure and monitor the related shift of moving objects in a strong vibration system.

Paper Details

Date Published: 13 July 1994
PDF: 5 pages
Proc. SPIE 2220, Sensing, Imaging, and Vision for Control and Guidance of Aerospace Vehicles, (13 July 1994); doi: 10.1117/12.179627
Show Author Affiliations
Junfu Ma, South China Normal Univ. (China)
Yanbin Zhu, South China Normal Univ. (China)

Published in SPIE Proceedings Vol. 2220:
Sensing, Imaging, and Vision for Control and Guidance of Aerospace Vehicles
Jacques G. Verly; Sharon S. Welch, Editor(s)

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