白光数字图像频域分析法在测量梁桥挠度中的应用  

Application of White Light Digital Image Analysis in Frequency Domain for Measuring Deflection of Beam Bridge

作　　者：隋修志[1] 杨新伟[1] 田瑞兰[2] 

机构地区：[1]石家庄铁路职业技术学院,河北石家庄050041 [2]石家庄铁道大学,河北石家庄050043

出　　处：《铁道建筑》2017年第12期40-44,共5页Railway Engineering

基　　金：河北省教育厅重点项目(ZD2016151);河北省自然基金青年基金项目(A2015421006)

摘　　要：将白光数字图像频域分析法引入到桥梁挠度测量中,阐述了其原理,并通过现场连续拍摄列车通过桥梁时跨中局部区域的照片和后期图像处理分析得到挠度变化过程曲线。白光数字图像频域分析法具有光路简单、操作方便、能进行近程和远程测量、测量精度高、测量成本低等优点,能克服传统检测方法的缺点。The principle of white light digital image analysis in frequency domain was expounded and it was introduced to measure beam bridge deflection.While a train is passing through a bridge, images of mid-span local area were captured continuously.Then using the white light digital image analysis in frequency domain,the bridge deflection changing process curves were obtained.White light digital image analysis in frequency domain has the advantages of simple optical path, convenient operation, short and long distance measurement,high accuracy and low cost.The method can overcome the shortcomings of traditional bridge deflection measurement methods.

关 键 词：铁路桥梁 挠度测量 白光数字图像频域分析法 原理 现场试验 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]