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. 2022 Jun 26;22(13):4837. doi: 10.3390/s22134837

Figure 15.

Figure 15

(a) The rotation sensor and its rectified voltage signals under different rotating speed (Reproduced with permission [109]. Copyright 2021 Elsevier); (b) (i) Schematic illustration of the ball-bearing structured TENG, (ii) the 26 voltage peaks at the rotating speed of 301 rpm, and the calculated speed of 301.13 rpm (Reproduced with permission [66]. Copyright 2016 IOP Publishing Ltd.); (c) A roller-bearing-based TENG for rotating sensing and its voltage in response to rotation movement with 360° rotation (Reproduced with permission [36]. Copyright 2018 WILEY-VCH Verlag GmbH & Co., KGaA, Weinheim, Germany); (d) The output voltage from four channels, which indicate that the rotator rotates to (I) 0°, (II) 90°, (III) 180°, and (IV) 270°. (Reproduced with permission [79]. Copyright 2015 WILEY-VCH Verlag GmbH & Co., KGaA, Weinheim, Germany).