UAV applicable line laser thermography for imaging of coating thickness and corrosion area in steel structures
This paper proposes an unmanned aerial vehicle(UAV)applicable line laser thermography(LLT)system for imaging of coating thickness and corrosion area in steel structures.Once the LLT system moves over the steel structures,the LLT system generate thermal waves on the steel structure using a continuous-wave(CW)laser,and measures the corresponding thermal responses as infrared(IR)images using an IR camera.Then,the measured IR images are integrated to map the thermal waves measured from the multiple areas of steel structure taken under the moving conditions.Finally,the integrated IR images are processed for imaging as well as quantifying the coating thickness and corrosion area.The proposed UAV applicable LLT system offers the following advantages:(1)coating thickness and corrosion area visualization can be carried out in a noncontact manner as the inspections are carried during the moving conditions;(2)spatial constraints on structural inspection overcome through the convergence of UAV and LLT system.The performance of the UAV applicable LLT system was verified by testing coated and corroded steel structure using a motion controller that can simulate the UAV motion.The coating thickness and corrosion area was successfully visualized and quantified.
laser thermography coating thickness corrosion area unmanned aerial vehicle
S.Hwang J.Park Z.Jin H.Sohn
Department of Civil and Environmental Engineering,KAIST,Daejeon 34141,Korea
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
1509-1510
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）