A Study of Data Processing Using Fourier Analysis for Non-Destructive Inspection of Concrete Structures by Active Infrared Thermography Method

Abstract

Data processing of sequential thermal data from concrete structure using infrared thermography is studied. Estimating a depth and a shape of the delamination defect in concrete, it is shown that phase value from sequential thermal data using Fourier analysis is effective. It can be also reduced disturbance depends on some noise from thermography or inhomogeneity of surface condition of concrete for detecting the defect.