Now showing items 1-20 of 32

  • Alimentació adaptativa d'un generador d'ultrasons de potència basada en un convertidor ressonant paral.lel controlat per un DSC 

    Calduch Cobos, Rubén (Universitat Politècnica de Catalunya, 2010-12-15)
    Master thesis (pre-Bologna period)
    Open Access
    Català: Disseny i fabricació d'una font d'alimentació per a transductors d'ultrasons de potència. Font d'alimentació formada per un convertidor ressonant DC/AC i controlada per un DSC que corregeix la freqüencia de sortida ...
  • Computation of the Spatial Impulse Response for Ultrasonic Fields on the Graphics Processing Units (GPU) 

    Florian, Luna (Universitat Politècnica de Catalunya, 2010-09-15)
    Master thesis
    Open Access
    Covenantee:  Australian National University
    The goal of the internship was to develop a linear wave-based simulation of ultrasonic fields. The theory was based on the Tupholme-Stepanishen formalism explained in the Jensen course for calculating pulsed ultrasound ...
  • Development of a handheld ultrasound receiver for the detection and identification of bat species 

    Blanco López, José Luis (Universitat Politècnica de Catalunya, 2016-09)
    Master thesis (pre-Bologna period)
    Open Access
    The BAT TUNE project is the development and production of a low cost heterodyne ultrasound receiver that is specifically designed for near professional activity monitoring of the different chiroptera species. The project ...
  • Estudi de l'efecte dels ultrasons en les propietats reològiques de diferents midons presents en vegetals 

    Boronat Demattey, Marta (Universitat Politècnica de Catalunya, 2017-10-20)
    Bachelor thesis
    Open Access
    Nowadays there is deep interest in investigating the use of ultrasounds in the food industry because of its possible benefits when it comes to optimizing and improving processes. The main objective of this project is to ...
  • Estudi per desenvolupar una pràctica docent d'inspecció amb ultrasons 

    Martí Navarro, Pau (Universitat Politècnica de Catalunya, 2017-06-28)
    Bachelor thesis
    Open Access
    En aquest treball es realitza l’estudi per poder desenvolupar una pràctica docent d’inspecció amb ultrasons amb l’objectiu d’entendre els assajos dels ultrasons i tenir nocions per poder configurar i realitzar els assajos. ...
  • Estudi tèrmic d'un soldador d'ultrasons refrigerat 

    Farnes Montpeyo, Tomas (Universitat Politècnica de Catalunya, 2017-06-15)
    Bachelor thesis
    Restricted access - confidentiality agreement
  • Experimental study of the propagation of acoustic waves by means of a Laser Doppler Vibrometer 

    Argelagos Palau, Ana Maria (Universitat Politècnica de Catalunya, 2014-05-08)
    Master thesis
    Open Access
    Propellant storage in space mi ssions could be more efficient with the ability to control the bubbles within the storage tanks. One of the effective options is to control bubbles using acoustic fields. The following ...
  • Fully Noncontact Hybrid NDT for 3D Defect Reconstruction Using SAFT Algorithm and 2D Apodization Window 

    Mohamed Selim, Hossameldin; Trull Silvestre, José Francisco; Delgado Prieto, Miquel; Pico Vila, Rubén; Romeral Martínez, José Luis; Cojocaru, Crina (Multidisciplinary Digital Publishing Institute (MDPI), 2019-05-08)
    Article
    Open Access
    Nondestructive testing of metallic objects that may contain embedded defects of different sizes is an important application in many industrial branches for quality control. Most of these techniques allow defect detection ...
  • Generador de salvas para un sistema de ensayos no destructivos basado en ondas ultrasónicas guiadas 

    Jiménez Sánchez, Daniel (Universitat Politècnica de Catalunya, 2011-09-27)
    Master thesis (pre-Bologna period)
    Open Access
    English: This PFC provides a design of a tested and specific tone-burst generator circuit for a Non-Destructive System based on ultrasonid guided waves. This circuit includes a complementary protection circuit for the NDT ...
  • Generador de salvas para un sistema NDT basado en ultrasonidos 

    Arjones Rodríguez, Venancio (Universitat Politècnica de Catalunya, 2010)
    Master thesis
    Open Access
    El trabajo del presente proyecto final de carrera (PFC), se enmarca dentro de un proyecto de investigación sobre ensayos no destructivos de materiales laminados, por ejemplo el papel, mediante señales ultrasónicas en ...
  • High-precision time-of-flight determination algorithm for ultrasonic flow measurement 

    Suñol Galofre, Francesc Xavier; Ochoa Guerrero, Diego A.; García García, José Eduardo (2019)
    Article
    Open Access
    Commercial time-of-flight (TOF) ultrasonic flowme- ters are rapidly expanding in the general industry. Among the different techniques that can be applied to determine the TOF of ultrasonic waves, the cross-correlation ...
  • Implementation and integration of an experimental vehicle sensor setup for automated parking 

    Linares, Alberto (Universitat Politècnica de Catalunya, 2018-09-17)
    Bachelor thesis
    Open Access
    Covenantee:  Technische Universität Darmstadt
    This thesis has been realized for the automotive engineering department of the TU-Darmstadt University. This department is currently carrying out research in the field of sensor modeling to support autonomous driving. ...
  • Improving the robustness and performance of quantusFLM® against different delineations 

    Espinola Molina, Jaime (Universitat Politècnica de Catalunya, 2016-05-23)
    Bachelor thesis
    Open Access
    Background: Neonatal respiratory morbidity (NRM) is the leading cause of mortality and morbidity associated with baby prematurity birth. Traditionally, Fetal lung maturity (FLM) is determined by measuring pulmonary surfactant ...
  • Lavado de tejidos de lana mediante agitación con ultrasonidos. 

    Carrión Fité, Francisco Javier (Instituto de Investigación Textil y Cooperación Industrial, 1996-01)
    Article
    Open Access
    Se realizó un estudio de la detergencia de tejido de lana Empa con suciedad standard en presencia de una emulsión de cloruro de metileno en agua mediante lecitina como emulsionante y utilizando una agitación de ultrasonidos.
  • Material defect reconstruction by non-destructive testing with laser induced ultrasonics 

    Mohamed Selim, Hossameldin; Delgado Prieto, Miquel; Trull Silvestre, José Francisco; Pico Vila, Rubén; Cojocaru, Crina (Institute of Physics (IOP), 2018)
    Conference report
    Open Access
    Aligned with current research efforts and industrial applications on nondestructive testing, in this work, a hybrid system combining remotely induced laser ultrasonics with conventional transducer detection is studied for ...
  • Medidor de distancias por ultrasonidos 

    Sánchez Blanco, Oliver (Universitat Politècnica de Catalunya, 2011-07-06)
    Master thesis (pre-Bologna period)
    Open Access
    El proyecto consiste en la realización de un medidor de distancias, para ello se ha utilizado un sensor de ultrasonidos y un microcontrolador. El sensor nos proporciona la señal que necesitamos para medir la distancia ...
  • Monitorización del proceso de fermentación maloláctica en el vino tinto mediante propagación de ondas de ultrasonido 

    Novoa Díaz, Daniel F.; Puig-Pujol, A.; Rodríguez Nogales, J. M.; Fernández Fernández, E.; Vila Crespo, J.; Capdevila, F; Amer, M.A.; García Álvarez, Víctor Óscar; Chávez Domínguez, Juan Antonio; García Hernández, Miguel J.; Turó Peroy, Antonio; Salazar Soler, Jorge (AMV, 2013)
    Conference report
    Restricted access - publisher's policy
    La acción de las bacterias fácticas, durante la fermentación maloláctica (FML) del vino tinto, tiene como principal finalidad la reducción del nivel de concentración del ácido málico al tiempo que se va incrementando el ...
  • Navegación autónoma de drones y automatización de rutas aplicadas a la limpieza de edificios 

    Plaza Rey, Daniel (Universitat Politècnica de Catalunya, 2017-06)
    Bachelor thesis
    Open Access
    This thesis describes the process of analysis and implementation of a SW solution, based on a low cost HW, to automate routes in building cleaning operatives using UAVs. In the first part of the thesis there is a review ...
  • P3R-3 design and characterization of air coupled ultrasonic transducers based on MUMPs 

    Martínez Graullera, Óscar Fernando; Martín Arguedas, Carlos Julián; Gómez-Ullate Alvear, Luis; Domínguez Pumar, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2007)
    Conference report
    Open Access
    This paper deals with the design and characterization of several capacitive micromachined ultrasonic transducer (cMUT) cells for the future design of an air-coupled transducer for non destructive testing (NDT). Each design ...
  • Phononic crystal device as a self-collimator for laser induced ultrasound 

    Mohamed Selim, Hossameldin; Pico Vila, Rubén; Trull Silvestre, José Francisco; Delgado Prieto, Miquel; Cojocaru, Crina (Sociedad Española de Acústica (SEA), 2018)
    Conference report
    Restricted access - publisher's policy
    Laser generated ultrasound has gained interest as an alternative source of ultrasound thanks to its remote operation, high resolution in the excitation area and broad frequency band. However, one of its drawbacks is the ...