Distributed Sensing in Capacitive Conductive Composites

摘要

In this paper, we describe a capacitance-based strain field sensor. The device is interrogated at a single location, and uses multiple excitation frequencies to resolve the spatial distribution of strain. The system we model is representative of a capacitor composed of a graphite-based conductive elastomer composite in a silicone binder with a silicone dielectric layer. We utilize an artificial neural network to reconstruct the strain based on the magnitude of the measured impedance. Our analysis uses finite element simulation to demonstrate the concept in a one-dimensional application. We demonstrate that multiple elements can be interrogated using a single electrical interface, reducing the complexity of high deformation sensor arrays.