Stretchable and Wearable Piezoresistive Insole for Continuous Pressure Monitoring

Author:

Canavese Giancarlo1,Stassi Stefano2,Fallauto Carmelo2,Corbellini Simone2,Cauda Valentina1,di Donato Marco1,Pirola Marco2,Pirri Fabrizio Candido1

Affiliation:

1. IIT-Italian Institute of Technology

2. Politecnico di Torino

Abstract

The feedback in the motor relearning therapy is essential and helpful for hemiplegic patient training. Tracking plantar pressure is clinically imperative to evaluate the foot function and in particular to assist patients with musculoskeletal and neurological diseases in the development of normal gait functionality. A flexible piezoresistive insole with dedicated electronics was developed to measure both the pressure distribution under 64 nodes arranged in the main plantar regions and the mean plantar pressure during walking activity with a sampling frequency of 20 Hz. This study reports on the easy and cost effective approach used to fabricate the flexible insole based on a piezoresistive material composed by copper spiky microparticles dispersed into silicon rubber. The entire insole was fabricated by single step casting technique, and then completed with a patterned metalized polyimide films as bottom electrode, while the top electrode was directly sputtered on the sample.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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