fig5

Figure 5. Response of the flexible sensing array to different hand motions. (A₁) Raw signal of 10 repetition cycles of hand movement “0”, (A₂) 3 Hz low-pass-filtered signal of 10 repetition cycles of hand movement “0”, (A₃) fast-pass filtered signal of hand movement “0” for 10 repetition cycles using a 3 Hz high-pass filtered signal; (B) Fast Fourier transform (a.u., arbitrary units) of the hand movement “0” signal; (C and D) three repetition cycles of the original signals of different hand movements; (E) Response times of different hand movements; (F) PSD curves from channel 6 for the nine different motions; (G) PSD curves for 10 repetition cycles of hand motion “0” for channel 6; (H) Mapping of different hand motion features in the 2D plane; (I) RMS of channel 6 for the detection of different hand motions; (J) SD of the rate of change of the output signals for the steady-state and motion states of the nine different hand motions. PSD: Power spectral density; RMS: root-mean-square; SD: standard deviation.