Figure 1.

Schematic and principle of foot plantar pressure using a highly sensitive crack-based sensor: (a) Schematic illustration of the crack-based, sensor-based insole plantar pressure sensor; (b) separation diagram of the sensor; (c) schematic illustration of the crack-based sensor. The inset image presents an SEM image of cracks on the sensor; (d) image of stainless steel with the crack-based sensor attached in the frame; (e) schematic illustration of the sensing mechanism; (f) resistance changes in responses to loading and unloading.