Fig. 3: Self-cleaning surface system frequency response characterization. | Microsystems & Nanoengineering

Fig. 3: Self-cleaning surface system frequency response characterization.

From: An active self-cleaning surface system for photovoltaic modules using anisotropic ratchet conveyors and mechanical vibration

Fig. 3

a Frequency response of water droplets with different volumes on Cytop surfaces under the same vibration acceleration amplitude of 1 g. The initial droplet width w0 on the Cytop surface was measured as 2.24, 2.87, and 3.39 mm separately by image processing. b Water droplet (7 µL) transport modes under different frequencies. The ARC track requires vibration input with higher accelerations to drive the water droplet forward as the frequency increases. c Minimum vibration acceleration map required to transport the droplet. Three droplets were measured at each frequency point. Data are shown ±one standard deviation for n = 3. d Estimated power consumption of the electromagnetic shaker. The overall load weight was measured at 200 g. The spring constant of the system is 12 N/mm according to the instrument datasheet.

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