Infrared active thermography offers subsurface details of the test item based on the thermal inhomogeneity of the constituent material. For successful analysis of diverse faults occurring at different depths in realistic objects, novel processing methodologies to enhance detectability and excitations permitting depth analysis with constituent band of frequencies are required. This paper demonstrates the depth analysis capabilities of phase modulated coded stimulation for infrared imaging, which has been confirmed using a glass fibre reinforced plastic plate with embedded Teflon inserts. Experiments indicated that using cumulative energy instead of distributed energy in pulse compression improved flaw detection in the current phase analysis. In addition to defect shape preservation, correlation-based processing was discovered to reduce non-uniform radiation/emissivity.
Author (s) Details
Md. M. Pasha
Department of Electronics and Communication Engineering, Koneru Lakshmaiah Education Foundation, Infrared Imaging Center, Green Fields, Vaddeswaram, Guntur, Andhra Pradesh, India and K. S. R. M College of Engineering Kadapa, Andhra Pradesh, India.
Dr. B. Suresh
Department of Electronics and Communication Engineering, Koneru Lakshmaiah Education Foundation, Infrared Imaging Center, Green Fields, Vaddeswaram, Guntur, Andhra Pradesh, India.
K. Rajesh Babu
Department of Electronics and Communication Engineering, Koneru Lakshmaiah Education Foundation, Infrared Imaging Center, Green Fields, Vaddeswaram, Guntur, Andhra Pradesh, India.
Sk. Subhani
PACE Institute of Technology and Science, India.
Dr. G. V. Subbarao
Department of Electronics and Communication Engineering, Koneru Lakshmaiah Education Foundation, Infrared Imaging Center, Green Fields, Vaddeswaram, Guntur, Andhra Pradesh, India.
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