Optoelectronic multipoint liquid level sensor for light petrochemical products

Vladimir Svirid; Sergei N. Khotiaintsev

doi:10.1117/12.388458

14 June 2000 Optoelectronic multipoint liquid level sensor for light petrochemical products

Vladimir Svirid, Sergei N. Khotiaintsev

Proceedings Volume 4148, Optoelectronic and Hybrid Optical/Digital Systems for Image and Signal Processing; (2000) https://doi.org/10.1117/12.388458
Event: International Workshop on Optoelectronic and Hybrid Optical/Digital Systems for Image/Signal Processing, 1999, Lviv, Ukraine

Abstract

In this article we describe an optoelectronic sensor for assessing the level of light petrochemical products in technological tanks at the oil refineries. This sensor employs the multi-element vertical array of discrete micro- optical refractometric transducers. The transducers are made of silica glass and have the conical shape. In the air, each transducer operates as a tiny retro-reflector that optically couple together two multimode optical fibers. The optical coupling in the transducer is due to the internal reflection at the conical surface. The amount of the coupling depends on the refractive index of the surrounding media. In a fluid, the total internal reflection vanishes and the coupling becomes negligibly small. The number of immersed transducers is a measure of the fluid level in the reservoir. Because of the significance of the transducer transmission function, it is evaluated in detail under various combinations of the geometrical parameters of the micro-optical structure and connecting optical fibers. The numerical ray tracing shows that the form of the transmission function can be modified by change of some geometrical parameters of the structure.

Citation Download Citation

Vladimir Svirid and Sergei N. Khotiaintsev "Optoelectronic multipoint liquid level sensor for light petrochemical products", Proc. SPIE 4148, Optoelectronic and Hybrid Optical/Digital Systems for Image and Signal Processing, (14 June 2000); https://doi.org/10.1117/12.388458

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