Pressure-sensitive insoles for real-time gait-related applications

Martini, Elena (avtor), Fiumalbi, Tommaso (avtor), Dell'Agnello, Filippo (avtor), Ivanić, Zoran (avtor), Munih, Marko (avtor), Vitiello, Nicola (avtor), Crea, Simona (avtor)

Wearable robotic devices require sensors and algorithms that can recognize the user state in real-time, in order to provide synergistic action with the body. For devices intended for locomotion-related applications, shoe-embedded sensors are a common and convenient choice, potentially advantageous for performing gait assessment in real-world environments. In this work, we present the development of a pair of pressure-sensitive insoles based on optoelectronic sensors for the real-time estimation of temporal gait parameters. The new design makes use of a simplified sensor configuration that preserves the time accuracy of gait event detection relative to previous prototypes. The system has been assessed relatively to a commercial force plate recording the vertical component of the ground reaction force (vGRF) and the coordinate of the center of pressure along the so-called progression or antero-posterior plane (CoP$_{AP}$) in ten healthy participants during ground-level walking at two speeds. The insoles showed overall median absolute errors (MAE) of 0.06 (0.02) s and 0.04 (0.02) s for heel-strike and toe-off recognition, respectively. Moreover, they enabled reasonably accurate estimations of the stance phase duration (2.02 (2.03) % error) and CoP$_{AP}$ profiles (Pearson correlation coefficient with force platform ρCoP = 0.96 (0.02)), whereas the correlation with vGRF measured by the force plate was lower than that obtained with the previous prototype ($_{ρv}$GRF = 0.47 (0.20)). These results confirm the suitability of the insoles for online sensing purposes such as timely gait phase estimation and discrete event recognition.

• Jezik: Angleški jezik
• Ključne besede: optoelectronic sensors, wearable sensors, sensorized insole, plantar pressure distribution, real-time gait monitoring, robot control
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FE - Fakulteta za elektrotehniko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2020
• Št. strani: 15 str.
• Številčenje: Vol. 20, iss. 5, art. 1448
• PID: 20.500.12556/RUL-133222
• UDK: 681.586:615.8
• ISSN pri članku: 1424-8220
• DOI: 10.3390/s20051448
• COBISS.SI-ID: 20038403
• Datum objave v RUL: 17.11.2021

Gradivo je del revije

• Naslov: Sensors
• Skrajšan naslov: Sensors
• Založnik: MDPI
• ISSN: 1424-8220
• COBISS.SI-ID: 10176278

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 06.03.2020

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: optoelektronski senzorji, nosljivi senzorji, senzorski vložek, porazdelitev podpornega tlaka, sprotno spremljanje hoje, vodenje robotov