Piezoelectric fiber composites(PFC)have been shown to have advantages of excellent actuatingabilities and conformability and can be used as surface-mounted transducers on plate or shellstructures in a
Thermography is used to record the surface temperature information.The surface temperature information is an important clue to indicate the defects presented in the building because defects can always
The impact-echo test can be adopted to detect the defects or inclusions in concrete structures.The conventional impact-echo analysis applies the Fourier transform to the surface response of the target