采用数字图像边缘检测法进行梁变形检测及破损识别  

Digital image edge detection method in the identification of the beam deformation and damage detection

作　　者：袁向荣[1] 刘敏[1] 蔡卡宏[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《四川建筑科学研究》2013年第1期68-70,共3页Sichuan Building Science

基　　金：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)

摘　　要：采用数字照相机采集简支梁在各种变形状态下的图像,在图像中,用多项式函数拟合梁边缘的灰度变化曲线,由曲线的一阶导数以亚像素精度识别边缘位置,由梁在各种变形状态下的边缘位置获得梁的变形曲线。由曲线的二阶导数计算梁的应变,由应变的变化识别梁的破损。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.

关 键 词：结构变形检测 破损识别 数字图像法 边缘检测 曲线拟合 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] U441[自动化与计算机技术—计算机科学与技术]