Fig. 6: Application of the composites for smart fall detection protection enhancement knee pad.

a Schematic diagrams and images of knee pad (scale bar, 10 mm), as well as an alarm detection test for knee pad (scale bar, 30 mm); b MATLAB element block distribution and the voltage waveforms of output voltage obtained from smart knee protector fall test; c Smart knee pad induction the data collection of voltage output waveform and MATLAB element block distribution of piezoelectricity for different levels of falls, including mild fall, moderate fall, and severe fall.