133171 20240322140241.0 doi 10.1109/JSEN.2019.2918592 sideral 111729 ART-2019-111729 eng Medrano Sánchez, Carlos Universidad de Zaragoza (orcid)0000-0002-1561-0536 Circuit analysis of matrix-like resistor networks for eliminating crosstalk in pressure sensitive mats 2019 Recent advances in piezoresistive materials have opened the possibility of developing pressure sensitive flexible mats that cover large areas. They are composed of arrays of sensitive cells. However, in many configurations proposed in the literature, the measurement of a single cell does not recover the cell resistance itself but the equivalent resistance between the row and column conductive strips that select it. If this effect is not corrected, unloaded regions can appear with non negligible pressure, as a kind of ghost object. Diodes can be placed to overcome the problem, but this makes the fabrication more complex especially for prototypes. In this paper we propose a novel software solution based on a circuit analysis of the mat. The set of cell resistances is obtained from the set of equivalent resistances between row and columns. Several algorithms are compared. For simulated values of the array, the true cell resistance can be recovered with a great accuracy. A good compromise between execution speed and error is achieved by a Newton-Krylov nonlinear solver. Nevertheless, this algorithm presents convergence problems when facing values of a real mat. In this case a fixed-point formulation is more appropriate. For 16x16 arrays, it can achieve relative errors with a mean value of 0.0258 in less than 0.1 s running on a regular PC. The removal of ghost objects is also shown visually. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA-FEDER/T49-17R info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 3.073 2019 ENGINEERING, ELECTRICAL & ELECTRONIC 91 / 265 = 0.343 2019 Q2 T2 PHYSICS, APPLIED 47 / 154 = 0.305 2019 Q2 T1 INSTRUMENTS & INSTRUMENTATION 18 / 64 = 0.281 2019 Q2 T1 0.749 2019 Instrumentation 2019 Q1 Electrical and Electronic Engineering 2019 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Igual-Catalán, Raúl Universidad de Zaragoza (orcid)0000-0001-7671-7540 Rodríguez-Ontiveros, Victor H. (orcid)0000-0002-6963-0727 Plaza-García, Inmaculada Universidad de Zaragoza (orcid)0000-0001-7550-6688 5008 785 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Tecnología Electrónica 5009 535 Universidad de Zaragoza Dpto. Ingeniería Eléctrica Área Ingeniería Eléctrica 19, 18 (2019), 8027-8036 IEEE sens. j. IEEE SENSORS JOURNAL 1530-437X 2457891 http://zaguan.unizar.es/record/133171/files/texto_completo.pdf Postprint 3491625 http://zaguan.unizar.es/record/133171/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:133171 articulos driver 2024-03-22-12:45:06 ARTICLE