Fig. 4: Viscosity sensing.
From: Vibrissae-inspired vision-based magnetic-actuated whisker
a Error band plots of the eight whiskers' movements across five different fluid conditions, where the mean represents the average displacement of the eight whiskers, and the shaded region indicates the standard deviation. b Pixel displacement of a single whisker over time. c Magnified view of the 9.8–11 s interval in panel (b), highlighting the whisker behavior. d Linear fit between decay rate and \({\log }_{10}\)(viscosity) (R2 ≈ 0.85). Each point shows the trial-averaged decay rate with error bars (±1 standard deviation across trials). Dashed line indicates the fitted regression.
