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Title |
The Efficiency of External Heat Sources for Infrared Thermography Applied Concrete Structures and the Improvement of the Defect-identification
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Authors |
심준기 ; 문도영 ; 정란 ; 이종세 ; 지광습 |
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Keywords |
적외선 열화상 기법 ; 열원 ; 내부공극 ; FRP쉬트 비부착 ; 화상처리기법 Infrared thermography ; heat source ; internal void ; unbonded FRP sheet ; Image processing |
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Abstract |
The purpose of this paper is to find an efficient heat source to amplify the surface temperature of damaged concrete structures for infrared thermography. we compare two different heat sources of far-infrared lamp and halogen lamp each other for their efficiency. The two heat sources were applied to the concrete specimens. Two different concrete specimens were used: one was the concrete containing internal void and the other was wrapped with partially unbonded fiber reinforced polymer sheet. it was found that the far-infrared lamp was more efficient than the halogen lamp. In addition, we propose a new algorithm to make the damage zone displayed clear in the image obtained from the thermographic operation. The algorithm is a combination of Gauss filtering process and the Prewitt mask operation.
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