Variation: Morphology

By changing channel geometry, other sensing modes besides strain are possible, including pressure, shear, and curvature (Vogt et al. 2013).

  • Pressure: spiral shaped channel
  • Curvature: EGaIn channel sits over 2 other gaps
  • Shear: incorporate force posts that will press on channels in different ways based on direction of shear/pressure

By stacking several different channel shapes, a single device capable of multiple types of sensing is possible (Vogt et al. 2013).

Three U-shaped microchannels at 120o intervals to detect forces in three directions.

Three microchannels with increased spatial resolution