Figure 3
From: Digital manufacturing of personalised footwear with embedded sensors
Piezoresistive sensors used to measure normal and shear forces. (a.i,ii) Images and schematics of the (i) normal and (ii) shear force sensors. (b–d) Responses in the form of change in resistance (∆R) of the normal sensor under (b) static, and (c) low-frequency or (d) high-frequency dynamic conditions. (e,f) Responses of the shear sensor in the form of the difference in resistance between front and back sensor as a function of (e) time and (f) applied shear force. (g) Sensitivity of the shear force sensor quantified in terms of normalized resistance change (%) under distinct normal and shear forces.
