Publication: Validación de un modelo empírico para calcular, mediante laser y fotodiodo, la potencia en función de la distancia para un blanco difusor
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Publication date
2012-04
Defense date
2012-04-18
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Abstract
Este proyecto fin de carrera se centra en un estudio teórico y experimental de un sistema de emisión/recepción, formado por láser y fotodiodo, con el objetivo de validar un modelo empírico que describa el comportamiento de un blanco difusor iluminado con un haz colimado y describa la potencia recibida en función de la distancia con el punto de reflexión. A partir de los resultados experimentales, obtenidos y procesados mediante un software de aplicación general (Matlab) hallaremos la ecuación que describa el funcionamiento del sistema. Será diseñado el sistema electrónico tanto para la parte de la emisión como de la recepción, teniendo en cuenta la longitud de onda a la que trabaja dicho sistema y los requisitos del mismo. El diseño de la parte de emisión constará de un driver diseñado para controlar nuestro láser emisor; la parte de la recepción constará de un fotodiodo de área ancha. La información recibida por dicho fotodiodo será procesada por un amplificador Lock in, capaz de procesar señales de baja intensidad. Los resultados experimentales obtenidos y procesados por Matlab serán comparados con un estudio teórico realizado, validando el funcionamiento de nuestro sistema. _____________________________________________________________________________________________________________________
This final project focuses on a theoretical and experimental study of a transmitter / receiver, consisting of laser and photodiode, in order to validate an empirical model that describes the behavior of a white diffuser illuminated with a collimated beam and describe the received power as a function of the distance to the reflection point. From the experimental results obtained and processed by general application software (Matlab) find the equation describing the system operation. The electronic system will be designed for both the portion of the emission and reception, taking into account the wavelength which the system works and its requirements. The design of the emission part consist of a driver designed to control our laser emitter, the part of the reception comprise a wide-area photodiode. The information received by the photodiode is processed by an amplifier Lock in, capable of processing signals of low intensity. The experimental results obtained and processed by Matlab will be compared with a theoretical investigation to confirm the functioning of our system.
This final project focuses on a theoretical and experimental study of a transmitter / receiver, consisting of laser and photodiode, in order to validate an empirical model that describes the behavior of a white diffuser illuminated with a collimated beam and describe the received power as a function of the distance to the reflection point. From the experimental results obtained and processed by general application software (Matlab) find the equation describing the system operation. The electronic system will be designed for both the portion of the emission and reception, taking into account the wavelength which the system works and its requirements. The design of the emission part consist of a driver designed to control our laser emitter, the part of the reception comprise a wide-area photodiode. The information received by the photodiode is processed by an amplifier Lock in, capable of processing signals of low intensity. The experimental results obtained and processed by Matlab will be compared with a theoretical investigation to confirm the functioning of our system.
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Keywords
Optoelectrónica, Electrónica de potencia, Láser, Fotodiodos