Creep and hysteresis compensation in pressure-sensitive mats for improving center-of-pressure measurements

Martínez-Cesteros, Javier (Universidad de Zaragoza) ; Medrano-Sánchez, Carlos (Universidad de Zaragoza) ; Castellanos-Ramos, Julián ; Sánchez-Durán, José A. ; Plaza-García, Inmaculada (Universidad de Zaragoza)

Resumen: 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.

Idioma: Alemán

DOI: 10.1109/JSEN.2023.3324363

Año: 2023

Publicado en: IEEE SENSORS JOURNAL 23, 23 (2023), 29585-29593
ISSN: 1530-437X

Factor impacto JCR: 4.3 (2023)

Categ. JCR: ENGINEERING, ELECTRICAL & ELECTRONIC rank: 84 / 353 = 0.238 (2023) - Q1 - T1
Categ. JCR: INSTRUMENTS & INSTRUMENTATION rank: 15 / 76 = 0.197 (2023) - Q1 - T1
Categ. JCR: PHYSICS, APPLIED rank: 48 / 179 = 0.268 (2023) - Q2 - T1

Factor impacto CITESCORE: 7.7 - Electrical and Electronic Engineering (Q1) - Instrumentation (Q1)

Factor impacto SCIMAGO: 1.084 - Instrumentation (Q1) - Electrical and Electronic Engineering (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/T49-20R
Financiación: info:eu-repo/grantAgreement/ES/MCIN/PID2021-125091OB-I00
Financiación: info:eu-repo/grantAgreement/ES/MCIU/FPU18-04282

Tipo y forma: Article (Published version)

Área (Departamento): Área Matemática Aplicada (Dpto. Matemática Aplicada)
Área (Departamento): Área Tecnología Electrónica (Dpto. Ingeniería Electrón.Com.)