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Proceedings Paper

Ladar fiber optical liquid level sensor system
Author(s): Wei Peng; Junxiu Lin
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Paper Abstract

A novel fiber-optic liquid level sensor of Laser radar is reported in this paper. Using the absolute technique of Ladar in which the phase of amplitude modulated lightwave reflected from the liquid face is compared with that of the original modulate signal, the liquid level can be measured precisely. A special symmetric compensating optical system, which has a common axis for light emitting and receiving, is proposed to eliminate many adverse effects. Separating and connecting its electric part and optical part by optical fiber cable, the one-time electronic-free optical measurement has been realized on a simulated oil tank and an accuracy of plus or minus 0.3% is achieved within a temperature range of 20 degrees to approximately 40 degrees Celsius over a measuring range of 0 to approximately 6 m.

Paper Details

Date Published: 7 May 1999
PDF: 4 pages
Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); doi: 10.1117/12.347724
Show Author Affiliations
Wei Peng, DaLian Univ. of Technology (United States)
Junxiu Lin, DaLian Univ. of Technology (China)

Published in SPIE Proceedings Vol. 3740:
Optical Engineering for Sensing and Nanotechnology (ICOSN '99)
Ichirou Yamaguchi, Editor(s)

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