Sprayed sensors were developed that can be networked to render real-time information on the health status of a structure, detecting hidden flaws. The sprayed nanocomposite sensors and an ultrasound actuator are used to actively detect the health condition of the structure to which they are fixed.
The sensors can also be sprayed on the surface of a moving structure to transmit the structural health information in a real-time manner. Each sensor is connected to a network via a wire printed on the structure. By analyzing and comparing the electrical signals converted from the electric resistivity, the network can spot the defect in a structure, as well as translate the signals into 3D images.