Ladar fiber optical liquid level sensor system

Wei Peng; Junxiu Lin

doi:10.1117/12.347724

7 May 1999 Ladar fiber optical liquid level sensor system

Wei Peng, Junxiu Lin

Proceedings Volume 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99); (1999) https://doi.org/10.1117/12.347724
Event: Optical Engineering for Sensing and Nanotechnology (ICOSN '99), 1999, Yokohama, Japan

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.

Citation Download Citation

Wei Peng and Junxiu Lin "Ladar fiber optical liquid level sensor system", Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); https://doi.org/10.1117/12.347724

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