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. 2022 Jan 24;12(2):60. doi: 10.3390/bios12020060

Figure 2.

Figure 2

The performance of the self-powered wearable sensor. (a) The schematic diagram of the bending sensor with stepper motor; (b) The output piezoelectric voltage at different bending frequencies; (c) Details of output piezoelectric voltage at different frequencies; (d) The output piezoelectric voltage at different bending angles; (e) The output piezoelectric voltage response at different frequencies; (f) The output piezoelectric voltage response at different angles; (g) The durability test of sensor.