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《Sichuan Building Science》 2013-01
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Digital image edge detection method in the identification of the beam deformation and damage detection

YUAN Xiangrong,LIU Ming,CAI Kahong(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China)  
The images of the simply supported beam in different state are captured by digital camera.The grey level curve of the beam edge in the images is fitted by the polynomial function.The first directive is used to identify the location of the edge in sub pixel precision.The deflection curves of the beam are obtained according the beam edge.The second directives of the deflection curve are used to obtain the strains of the beam.The damage of the beam is detected by the strains.
【Fund】: 国家自然科学基金项目(51078093);; 西南交通大学牵引动力国家重点实验室开放课题(TPL1001)
【CateGory Index】: U441;TP391.41
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