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oai:riuma.uma.es:10630/326992026-02-03T11:01:42Zcom_10630_2254col_10630_37953

Martínez-Cesteros, Javier Medrano-Sánchez, Carlos Castellanos-Ramos, Julián Sánchez-Durán, José Antonio Plaza-García, Inmaculada martinez cesteros 2024-09-20T07:40:53Z 2024-09-20T07:40:53Z 2023 J. Martínez-Cesteros, C. Medrano-Sánchez, J. Castellanos-Ramos, J. A. Sánchez-Durán and I. Plaza-García, "Creep and Hysteresis Compensation in Pressure-Sensitive Mats for Improving Center-of-Pressure Measurements," in IEEE Sensors Journal, vol. 23, no. 23, pp. 29585-29593, 1 Dec.1, 2023, doi: 10.1109/JSEN.2023.3324363 https://hdl.handle.net/10630/32699 10.1109/JSEN.2023.3324363 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. eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Tacto Detectores Creep and Hysteresis Compensation in Pressure-Sensitive Mats for Improving Center-of-Pressure Measurements journal article