fig6

Figure 6. (A) Bar chart comparison of average sensing signals for a four-channel pressure sensing system, inset is the pattern illustration and real picture; (B) Sensing signal patterns by the sequence of pressing channels 1, 2, 3, and 4 in succession sequentially; (C) Signal pattern of the two-TENG insole while walking with the center of gravity at the front; (D) Signal pattern of the two-TENG insole while walking with the center of gravity at the back; (E) Bar chart comparison of average sensing signals while walking with center at the front, center at the back, and center at the middle, respectively, inset is the photo of the double-TENG insole. TENGs: Triboelectric nanogenerators.