3D Printed Soft and Flexible Insole with Intrinsic Pressure Sensing Capability

This work presents a soft, flexible, and low-cost capacitive pressure-sensitive insole developed using resource-efficient single-step 3D printing method. Developed elastomeric materials, the soft robust sensory can bend twist in extreme angles. The is designed to have four sensing zones capture pressure information from entire contact area. sensors tested under different condition of applied showed reliable response up 300kPa without saturation. exhibit sensitivity 2.4MPa-1 for range 0 - 60kPa 0.526MPa-1 above with average 1.314 MPa-1 range. was also varying bending temperature conditions. Considering excellent over wide range, presented could be used gait analysis or anthropomorphic robots critical about terrain morphology. To show functionality insole, we an app display obtained via custom-made electronics circuit.