2026-04-17T10:26:45Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/44092022-04-29T12:40:26Zcom_10259_3968com_10259_3808com_10259.4_106com_10259_2604col_10259_4157

Izquierdo, Alberto Villacorta, Juan José Val Puente, Lara del Suarez Vivar, Luis Alfredo 2017-04-06T11:08:35Z 2017-04-06T11:08:35Z 2016-10 http://hdl.handle.net/10259/4409 This paper proposes a scalable and multi-platform framework for signal acquisition and processing, which allows for the generation of acoustic images using planar arrays of MEMS (Micro-Electro-Mechanical Systems) microphones with low development and deployment costs. Acoustic characterization of MEMS sensors was performed, and the beam pattern of a module, based on an 8 × 8 planar array and of several clusters of modules, was obtained. A flexible framework, formed by an FPGA, an embedded processor, a computer desktop, and a graphic processing unit, was defined. The processing times of the algorithms used to obtain the acoustic images, including signal processing and wideband beamforming via FFT, were evaluated in each subsystem of the framework. Based on this analysis, three frameworks are proposed, defined by the specific subsystems used and the algorithms shared. Finally, a set of acoustic images obtained from sound reflected from a person are presented as a case study in the field of biometric identification. These results reveal the feasibility of the proposed system Spanish research project SAM: TEC 2015-68170-R (MINECO/FEDER, UE) application/pdf eng MDPI Sensors, 2015, V. 16, n. 10, art. 1671 http://dx.doi.org/10.3390/s16101671 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess MEMS array scalable system multi-platform framework acoustic imaging Ingeniería civil Civil engineering Design and Evaluation of a Scalable and Reconfigurable Multi-Platform System for Acoustic Imaging info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion