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Título del libro: Cerma 2009 - Electronics Robotics And Automotive Mechanics Conference
Título del capítulo: Optical-Fiber Refractometric Sensor with Semi-Cylindrical Optical Detection Element for Measuring the Level of Gasoline

Autores UNAM:
SERGIY KHOTYAINTSEV; SELENE PEREZ GARCIA;
Autores externos:

Idioma:
Inglés
Año de publicación:
2009
Palabras clave:

Automobile tanks; Cylindrical surface; Enhanced sensitivity; Experimental data; Internal reflections; Multimode optical fibers; Optical beams; Optical couplings; Optical detection; Refractometric sensors; Theoretical result; Automobile electronic equipment; Automobile fuel tanks; Fibers; Gasoline; Light reflection; Light refraction; Mechanics; Multimode fibers; Optical fibers; Optical materials; Refractive index; Refractometers; Robotics; Sensors; Transducers; Automobile parts and equipment


Resumen:

We present a novel optical fiber refractometric sensor with semi-cylindrical optical detection element. A pair of the multimode optical fibers is attached symmetrically to the element's flat plane. The optical coupling of the two fibers due to internal reflection of light from the element's cylindrical surface is sensitive to the refractive index of the surrounding medium. We exploit several internal reflections in series and partial focusing of the optical beam by the element's cylindrical surface to achieve enhanced sensitivity to the refractive index of the surrounding medium and reduced intrinsic optical loss in the transducer. We show theoretically that the transducer, in particular, can discriminate between the air and gasoline. We also present experimental data obtained with plastic detection element, which confirm our theoretical results. A vertical array of such transducers employing a relatively long single semi-cylindrical detection element can access the level of gasoline in automobile tanks.


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