130143 20260219141449.0 doi 10.1109/JSEN.2023.3324363 sideral 136449 ART-2023-136449 deu Martínez-Cesteros, Javier Universidad de Zaragoza (orcid)0000-0001-8458-5656 Creep and hysteresis compensation in pressure-sensitive mats for improving center-of-pressure measurements 2023 Access copy available to the general public Unrestricted Large-area tactile sensors are used to image the pressure exerted by human body parts. More specifically, they can be used to measure plantar pressure on human stability tests. The center-of-pressure (CoP) trajectory is the primary outcome of such tests. Previous research has shown that the parameters obtained from the trajectory correlate with those obtained from a reference instrument, that is, a force platform (FP). However, there are still noticeable differences. In this work, a low-cost prototype of a pressure-sensitive mat (PSM) has been built and compared with an FP in stability tests. The sensitive material is Velostat, which is readily available. Such a mat could make objective stability tests more accessible. A model of two nonlinear effects, hysteresis and creep, has been considered to compensate for them. Given that it was rather difficult to characterize the large mat with a pneumatic device, a small-sized sensor array was first characterized in a controlled environment. Then the model was extended to the large mat using a suitable scaling factor. The experimental results show that compensating for the nonlinear effects led to a decrease in the differences between the two instruments, the FP and the mat, with an average improvement of 26% in the distance between the trajectories. info:eu-repo/grantAgreement/ES/DGA/T49-20R info:eu-repo/grantAgreement/ES/MCIN/PID2021-125091OB-I00 info:eu-repo/grantAgreement/ES/MCIU/FPU18-04282 info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 4.3 2023 ENGINEERING, ELECTRICAL & ELECTRONIC 84 / 353 = 0.238 2023 Q1 T1 INSTRUMENTS & INSTRUMENTATION 15 / 76 = 0.197 2023 Q1 T1 PHYSICS, APPLIED 48 / 179 = 0.268 2023 Q2 T1 1.084 2023 Instrumentation 2023 Q1 Electrical and Electronic Engineering 2023 Q1 7.7 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Medrano-Sánchez, Carlos Universidad de Zaragoza (orcid)0000-0001-7671-7540 Castellanos-Ramos, Julián Sánchez-Durán, José A. Plaza-García, Inmaculada Universidad de Zaragoza (orcid)0000-0001-7550-6688 2005 595 Universidad de Zaragoza Dpto. Matemática Aplicada Área Matemática Aplicada 5008 785 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Tecnología Electrónica 23, 23 (2023), 29585-29593 IEEE sens. j. IEEE SENSORS JOURNAL 1530-437X 2614821 http://zaguan.unizar.es/record/130143/files/texto_completo.pdf Versión publicada 3482199 http://zaguan.unizar.es/record/130143/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:130143 articulos driver 2026-02-19-14:14:15 ARTICLE