Extended Data Fig. 5: Sensor analytical model.
From: Ultra-sensitive and resilient compliant strain gauges for soft machines
a, A schematic depiction of the simplified sensor geometry used to develop the analytical model and the resistive ladder electrical abstraction. The lumped elements labelled RC (for resistive contact) represent the contact-dependent variable resistance. b–d, Sensor model prediction for: b, sensor gauge factor; c, tensile strain in the sensing region; and d, resistance change, ∆R/R0 (all normalized by their values at scaling factor 1), as a function of varying width, pitch and anisotropy ratio (AR) (in c, the width line is overlapped by the AR line). A scaling factor of 1 is equivalent to width 10 mm, pitch 200 µm and AR = 1.2. All other parameters are held constant. The figure shows that for the range of values explored, the gauge factor and resistance range are most sensitive to variations in the sensor width, and the sensor strain range is most sensitive to variations in the sensor pitch.
