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Ezcurdia Aguirre, Íñigo Fermín

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https://academica-e.unavarra.es/handle/2454/48992

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Ezcurdia Aguirre

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Íñigo Fermín

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Estadística, Informática y Matemáticas

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ISC. Institute of Smart Cities

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0000-0003-4268-6760

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811121

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20212
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Subject: Acoustic hologram algorithm ×

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Now showing 1 - 2 of 2
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    PublicationOpen Access
    LeviPrint: contactless additive manufacturing using acoustic levitation with position and orientation control of elongated parts
    (2021) Ezcurdia Aguirre, Íñigo Fermín; Morales González, Rafael; Marzo Pérez, Asier; Estadística, Informática y Matemáticas; Estatistika, Informatika eta Matematika
    LeviPrint assembles small objects in a contactless way using ultrasonic phased-arrays and optimization algorithms. We explore a set of methods that enables 6 Degrees-of-Freedom (DoF) control of elongated bodies. We then evaluate different ultrasonic arrangements to optimize the manipulation of these bodies. The combination of arrangements and optimization algorithms allow us to levitate, orientate and assemble complex objects. These techniques and arrangements can be leveraged for the microfabrication of electromechanical components and in-vivo additive manufacturing. We highlight the reduction of cross-contamination and the capability to manufacture inside closed containers from the outside.
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    PublicationOpen Access
    Generating airborne ultrasonic amplitude patterns using an open hardware phased array
    (MDPI, 2021) Morales González, Rafael; Ezcurdia Aguirre, Íñigo Fermín; Irisarri Erviti, Josu; Andrade, Marco A.B.; Marzo Pérez, Asier; Estadística, Informática y Matemáticas; Estatistika, Informatika eta Matematika; Gobierno de Navarra / Nafarroako Gobernua
    Holographic methods from optics can be adapted to acoustics for enabling novel applications in particle manipulation or patterning by generating dynamic custom-tailored acoustic fields. Here, we present three contributions towards making the field of acoustic holography more widespread. Firstly, we introduce an iterative algorithm that accurately calculates the amplitudes and phases of an array of ultrasound emitters in order to create a target amplitude field in mid-air. Secondly, we use the algorithm to analyse the impact of spatial, amplitude and phase emission resolution on the resulting acoustic field, thus providing engineering insights towards array design. For example, we show an onset of diminishing returns for smaller than a quarter-wavelength sized emitters and a phase and amplitude resolution of eight and four divisions per period, respectively. Lastly, we present a hardware platform for the generation of acoustic holograms. The array is integrated in a single board composed of 256 emitters operating at 40 kHz. We hope that the results and procedures described within this paper enable researchers to build their own ultrasonic arrays and explore novel applications of ultrasonic holograms.