Multiple strain sensors are required to identify individual forces/stresses on human joints and recognize how they work together in order to determine the motion’s direction and trajectory.However,current sensors can...Multiple strain sensors are required to identify individual forces/stresses on human joints and recognize how they work together in order to determine the motion’s direction and trajectory.However,current sensors cannot detect and differentiate the individual forces/stresses and their contributions to the motion from the sensors’electrical signals.To address this critical issue,we propose a concept of unimodal tension,bend,shear,and twist strain sensors with piezoelectric poly L-lactic acid films.We then construct an integrated unimodal sensor(i-US)using the unimodal sensors and prove that the i-US can detect and differentiate individual strain modes,such as tensioning,bending,shearing,and twisting in complex motion.To demonstrate the potential impact of unimodal sensors,we design a sleeve and a glove with the i-US that can capture wrist motions and finger movements.Therefore,we expect unimodal strain sensors to provide a turning point in developing motion recognition and control systems.展开更多
基金supported by the EU Horizon 2020 through project ETEXWELD-H2020-MSCA-RISE-2014 (Grant No.644268)the University of Manchester through the UMRI project-Graphene-Smart Textiles E-Healthcare Network (Grant No.AA14512)the Engineering and Physical Sciences Research Council (EPSRC)of UK (Grant EP/V057782/1).
文摘Multiple strain sensors are required to identify individual forces/stresses on human joints and recognize how they work together in order to determine the motion’s direction and trajectory.However,current sensors cannot detect and differentiate the individual forces/stresses and their contributions to the motion from the sensors’electrical signals.To address this critical issue,we propose a concept of unimodal tension,bend,shear,and twist strain sensors with piezoelectric poly L-lactic acid films.We then construct an integrated unimodal sensor(i-US)using the unimodal sensors and prove that the i-US can detect and differentiate individual strain modes,such as tensioning,bending,shearing,and twisting in complex motion.To demonstrate the potential impact of unimodal sensors,we design a sleeve and a glove with the i-US that can capture wrist motions and finger movements.Therefore,we expect unimodal strain sensors to provide a turning point in developing motion recognition and control systems.
