Research / 2021 / Article / Fig 6

Research Article

Concealed Wireless Warning Sensor Based on Triboelectrification and Human-Plant Interactive Induction

Figure 6

(a) Scheme of the green plant-based monitoring sensor; (b) photograph of the green plant-based monitoring sensor in practical use; (c) detected signals when a human body steps close to and away from the plant; (d) detected signals under different step frequencies; (e) detected signals for four different individuals wearing different shoes; and (f) FFT analysis of four different individuals wearing different shoes.