Barker Coded Thermal Wave Imaging for Defect Detection of Carbon Fiber Reinforced Polymer

InfraRed Thermography (IRT) is a widely used Non-Destructive Testing (NDT) method for inspection of various structures and components in the fields of renewable energy, aerospace, automobiles industry, etc. The paper presents Barker Coded Thermal Wave Imaging (BCTWI) technique based on pulse compression approach to obtain enhanced probing depth and resolution for testing of Carbon Fiber Reinforced Polymers (CFRP) sample. The time domain and frequency domain analysis has been carried out for quantitative assessment of the defects in the CFRP sample. Results shows that BCTWI with time domain approach significantly improves the defect depth resolution in comparison to the conventional frequency domain analysis approach.