Design of a Soft Strain/Curvature Sensor for Smart Wearable Device

In order to meet the needs of the smart wearable devices for strain and curvature detection, a flexible strain/curvature sensor with simple structure and convenient manufacture technology is designed by using silicon rubber and gallium-indium tin alloy. The basic structure of the sensor is proposed and the working principle of the soft sensor is demonstrated. Moreover, the mathematical model of this strain/curvature sensor is defined to analysis the corresponding relationship between strain/curvature and the rate of resistance change. Finally. the production process of the experimental prototype system is given and the discussion of the proposed structure is illustrated.