Goñi Carnicero, Jaime

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https://academica-e.unavarra.es/handle/2454/49197

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Goñi Carnicero

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Jaime

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Ingeniería Eléctrica y Electrónica

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751797

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811476

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2021 - 20232
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Author: Galar Idoate, Mikel ×

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    PublicationOpen Access
    Enhancing the quality of amplitude patterns using time-multiplexed virtual acoustic fields
    (American Institute of Physics, 2023) Elizondo Martínez, Sonia; Ezcurdia Aguirre, Íñigo Fermín; Goñi Carnicero, Jaime; Galar Idoate, Mikel; Marzo Pérez, Asier; Estadística, Informática y Matemáticas; Estatistika, Informatika eta Matematika
    Ultrasonic fields can push and levitate particles, heat up materials, induce contactless tactile stimuli, or affect the blood-brain barrier. Current phased-arrays can create dynamic amplitude patterns, but their quality may be insufficient due to the limited density of emitters. On the other hand, passive modulators can provide high quality, but only static patterns can be generated. Here, we show and evaluate how the average of multiple time-multiplexed amplitude fields improves the resolution of the obtained patterns when compared with the traditional single-emission method. We optimize the non-linear problem of decomposing a target amplitude field into multiple fields considering the limitations of the phased-array. The presented technique improves the quality for existing setups without modifying the equipment, having the potential to improve bio-printing, haptic devices, or ultrasonic medical treatments.
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    PublicationOpen Access
    PhantomFields: fast time and spatial multiplexation of acoustic fields for generation of superresolution patterns
    (2021) Elizondo Martínez, Sonia; Goñi Carnicero, Jaime; Galar Idoate, Mikel; Marzo Pérez, Asier; Estadística, Informática y Matemáticas; Estatistika, Informatika eta Matematika
    Ultrasonic fields generated by phased arrays can be tailored to obtain a custom pattern of acoustic radiation forces. These force fields can pattern particles as well as be felt by the human hand, enabling applications for bioprinting and contactless haptic devices. The forcé fields can be switched orders of magnitude faster than the reaction time of the particles that it pushes or the human mechanoreceptors of touch. Therefore, a quick multiplexation in time or in space of different acoustic fields will be perceived as the average field. In this paper, we optimise the non-linear problem of decomposing a target force field into several multiplexed acoustic fields. We create averaged fields, PhantomFields, that cannot be created by a regular (unique) emission of an acoustic field. We improve accuracy by time multiplexation and spatial multiplexation, i.e. quick rotation of the emitters. These processes improve the resolution and strength of the obtained fields without the requirement of new hardware, opening up applications in haptic devices and 3D printing.