Velocimetría adaptiva utilizando el efecto de la fuerza foto electromotriz no estacionaria
Here we have investigated both theoretically and experimentally an adaptive velocimeter based on non-steady state photo-EMF effect. First we develop the theoretical model for non-steady state photo-EMF current induced by the vibrating interference pattern which simultaneously shifts at a constant ve...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2007 |
| País: | México |
| Institución: | Instituto Nacional de Astrofísica, Óptica y Electrónica |
| Repositorio: | Repositorio Institucional del INAOE |
| Idioma: | español |
| OAI Identifier: | oai:inaoe.repositorioinstitucional.mx:1009/636 |
| Acceso en línea: | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/636 |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/Velocimetro láser/Laser velocimeter info:eu-repo/classification/Fotodetectores/Photodetectors info:eu-repo/classification/Sensores/Sensors info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/22 info:eu-repo/classification/cti/2209 info:eu-repo/classification/cti/220919 |
| Sumario: | Here we have investigated both theoretically and experimentally an adaptive velocimeter based on non-steady state photo-EMF effect. First we develop the theoretical model for non-steady state photo-EMF current induced by the vibrating interference pattern which simultaneously shifts at a constant velocity, product of Doppler frequency shift. The analysis of analytical expression derived from this model shows that photo-EMF current peaks sharply when the frequency of periodic vibrations matches the Doppler frequency shift. Detecting the position of this peak it is possible to determine the velocity of the object which induces the Doppler shift. Experiments performed in reflectance and transmission configuration and using the sensor based in PF6:TPD photoconducting polymer and Gallium Arsenide semiconductor show that experimental behavior of photo-EMF signal agrees very well with the predictions of theory. |
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