Fig. 3: Tests of the mechanical integrity of the 3D pressure sensor.
From: Soft, full Wheatstone bridge 3D pressure sensors for cardiovascular monitoring
a Schematic illustration of a benchtop setup to test responses to shear stress. Deformation states and stress distributions are determined by FEA as the sensor is subjected to increasing force along the m-axis (b) and n-axis (c). d Fractional change in ADC values as a function of shear force. SPL stands for the serpentine PI layer. e Fractional change in ADC values during 5.5 s of 0.1 N of shear force. f Fractional change of ADC at different stages of fatigue testing at loading speeds of 50 and 200 μm/s (loading and unloading) over 1000 cycles.
