Self ‐Powered Insole Plantar Pressure Mapping System

Sensitive monitoring and real‐time foot pressure mapping have important applications for medical treatment/diagnostics, sports training, and even security. In this work, a facile plantar pressure mapping system with a large pressure detection range using piezoelectric nanogenerators serving as the sensor array to acquire pressure signals, and a self‐designed data acquisition (DAQ) circuit board to process and wirelessly send the signals to a mobile terminal, such as a smart phone, are developed. Working with an application program developed in Android, the whole system can accurately monitor and visually display the real‐time pressure distribution during walking. More importantly, by combining a hybridized triboelectric–electromagnetic nanogenerator, a self‐powered, continuous, and real‐time pressure distribution monitoring system is developed, which provides a feasible solution for sport/exercise biomechanics information acquisition, injury prevention, and ulceration prediction in the feet. Using a hybridized triboelectric–electromagnetic nanogenerator as power source and piezoelectric nanogenerator as pressure sensor, a self‐powered insole plantar mapping system is developed. The acquired pressure signals can be processed and sent wirelessly to a mobile terminal by a self‐designed data acquisition circuit, enabling to reflect the pressure distribution, dynamic motion, and mapping in real time.