FeetBeat: A Flexible Iontronic Sensing Wearable Detects Pedal Pulses and Muscular Activities
The world-first pedal wearable system, named FeetBeat, has been presented to acquire both vital signals and muscular activities. This system has been seamlessly integrated into a shoe format by constructing a sensitive and flexible pressure sensing array enabled by the iontronic sensing principle. It can capture high-definition peripheral arterial pulse waveforms, from which heart rates and respiratory patterns can be extracted within a medical-standard precision. Meanwhile, the high spatial resolution of the sensing array not only allows alignment-free tracking of pulse signals, while serving as a location reference to identify individual pedal tendon activities, from which various foot gestures can be distinguished.