Optimized Creep-Hysteresis Model to Improve Center-of-Pressure Detection in Pressure-Sensitive Mats

Domínguez-Gimeno, Sergio (Universidad de Zaragoza) ; Medrano-Sanchez, Carlos (Universidad de Zaragoza) ; Igual-Catalan, Raul (Universidad de Zaragoza) ; Plaza-Garcia, Inmaculada (Universidad de Zaragoza)

Resumen: Pressure-sensitive mats (PSMs) have a wide variety of applications. They can be used to measure the center of pressure (CoP) when a person is standing. Measuring CoP is useful for several applications, such as human stability assessment or fall risk prediction. Low-cost PSMs can be manufactured using piezoresistive materials, such as Velostat, whose conductance depends on the pressure exerted. However, these low-cost materials often suffer from hysteresis and creep. These effects worsen CoP measurement. Therefore, correction of hysteresis and creep effects is required to improve it. In this study, a creep-hysteresis correction model is applied to quantify CoP displacements obtained with PSMs. The model to correct creep and hysteresis effects is optimized using the CoP measurements themselves. This is a novel approach to optimize the creep and hysteresis model for this application. This approach has been experimentally tested on three different PSMs, including a commercial mat. Several tests and comparisons with existing models were performed, resulting in an improvement in CoP measurement when the CoP-optimized creep-hysteresis correction model was applied.

Idioma: Inglés

DOI: 10.1109/JSEN.2025.3550826

Año: 2025

Publicado en: IEEE SENSORS JOURNAL 25, 9 (2025), 15295-15306
ISSN: 1530-437X

Tipo y forma: Article (Published version)

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