A Self-Sensing Interwoven Network With Superelastic SMA Wires

Sensor networks play an important role in structural health monitoring and tactile sensors. General sensor networks require different types and a large number of sensors. This article proposes a shape memory alloy (SMA) sensor interwoven network. Without the need for additional force or displacement sensors, the position of one external force acting on the sensor network can be estimated, and the magnitude of the force and the corresponding deformation of the sensor network can be determined, only by measuring the resistance of the SMA wires. This article not only proposes a theoretical analytical model to solve the force position and its magnitude, and even the entire deformation of the SMA sensor network, but also designs a sensor network and its test bench for loading experiments. The experimental results confirm the feasibility of the theoretical model. The SMA sensor interwoven network has important application value under the condition that it is not convenient to directly observe the position of the external force and monitor the force size, such as an intelligent self-sensing badminton racket at least.