LAUSR

E-textiles have recently gained significant traction in the development of soft wearables for healthcare applications. However, there have been limited works on wearable e-textiles with embedded stretchable circuits. Here, we have developed stretchable conductive knits with tuneable macroscopic electrical and mechanical properties by varying the yarn combination and the arrangement of stitch types at the meso-scale. We designed highly extensible piezoresistive strain sensors (>120% strain) of high sensitivity (gauge factor 8.47) and durability (>100,000 cycles), interconnects (>140% strain) and resistors (>250% strain), optimally arranged to form a highly stretchable sensing circuit. The wearable is knitted with a CNC knitting machine that offers a cost effective and scalable fabrication method with minimal post-processing. The real-time data from the wearable is transmitted wirelessly using a custom designed circuit board. In this work, we have demonstrated an all knitted and fully integrated soft wearable for wireless and continuous real-time sensing of knee joint motion of multiple subjects performing various activities of daily living. This article is protected by copyright. All rights reserved.