REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

Aluminium tiles defects detection by employing pulsed thermography method with different thermal cameras

LJUBIŠA TOMIĆ

Military Technical Institute, Belgrade, ljubisa.tomic@gmail.com

VESNA DAMNJANOVIĆ

Faculty of Mining and Geology, University of Belgrade, vesna.damnjanovic@rgf.bg.ac.rs

GORAN DIKIĆ

Military Academy, University of Defence in Belgrade, goran.dikic@mod.gov.rs

BOBAN BONDŽULIĆ

Military Academy, University of Defence in Belgrade, bondzulici@yahoo.com

BOJAN MILANOVIĆ

Military Academy, University of Defence in Belgrade, bojan.milanovic@va.mod.gov.rs

RADE PAVLOVIĆ

Military Technical Institute, Belgrade, rade_pav@yahoo.com

Abstract: The results of nondestructive testing of aluminum test plates by pulsed thermography are presented in the paper. Rectangular defects of different widths and depths are simulated in plan-parallel plates. The test plates are recorded by two different thermal cameras. The experimental conditions during the two recording sessions remain unchanged. The thermal images are compared and quantitatively analyzed. The parameter used for comparison in the quantitative analysis is the maximum temperature difference between the defective and defect-free areas, at different frame rates. The advantages and shortfalls of using different thermal cameras, and the benefits of external triggering and automated synchronization of the light sources with the beginning of recording, are assessed.

Keywords: pulsed thermography, nondestructive testing, defects in material, temperature contrast.