Embedded Pressure Sensing Metamaterials using TPU-Graphene Composites and Additive Manufacturing

• DOI: 10.36227/techrxiv.22184071.v1
• Publication Date: 2023-03-06T19:14:09Z
• Authors: Inigo Sanz Pena; Matthew Hopkins; Noelia Rubio Carrero; Hang Xu
• Keywords: Piezoresistive effect; Linearity

<p>Nearly 15% of the global population is affected by disabilities impacting mobility. Monitoring foot pressure distribution during gait a fundamental aspect evaluating rehabilitation. Wearable systems provide portable alternative to stationary equipment monitoring without laboratory space limitations. However, wearable sensors in some applications present challenges calibration, sensitivity, and human-sensor interface, requiring application-specific sensors. This study aimed develop where structural material properties can characterise sensitivity range measurement design phase. We developed piezoresistive using additive manufacturing create mechanical metamaterials with embedded pressure-sensing capabilities. The were fabricated TPU SLS graphene ink infusion processes. Three designs for different measuring ranges (0 – 50 N, 0 100 150 N) body-centred cubic lattices constructed via pyramid unit cells. Two processes evaluated. tested sensors' behaviour, compressive force, strain, electrical resistance across sensor. analysed influence dimensions process on behaviour. was mainly tuneable dimensions. influenced linearity response. results indicate characterisation based parameters properties. Mechanical could embed sensing wearables, allowing customisation manufacture inks. </p>