摘要
介绍了一种基于三维数字图像相关法的模型表面应力测量系统,采用两台高速摄像机同步采集被测模型表面图像,以模型表面的散斑作为载体,通过图像子区立体匹配算法匹配被测模型变形前后两幅散斑图像中的不同图像子区,解算得到模型上不同点的三维坐标值,获得模型表面的三维变形信息,实现模型表面非接触、动态实时的应力测量。
A model of the surface stress measurement system based on the three⁃dimensional digital image correlation method is introduced.Two high⁃speed cameras to synchronously collect the surface image of the tested model and the speckle on the model surface as the carrier is used,the tested model through the image sub⁃region stereo matching algorithm is matched.Different image sub⁃regions in the two speckle images before and after the model deformation are solved to obtain the three⁃dimensional coordinate values of different points on the model,and the three⁃dimensional deformation information of the model surface is obtained,and the non⁃contact,dynamic real⁃time stress measurement of the model surface is realized.
作者
袁媛
孙增玉
王杏
高越
刘柯
YUAN Yuan;SUN Zeng-yu;WANG Xing;GAO Yue;LIU Ke(Beijing Aerospace Institute for Metrology and Measurement Technology,Beijing 100076,China)
出处
《宇航计测技术》
CSCD
2020年第6期31-36,共6页
Journal of Astronautic Metrology and Measurement
基金
装备预研航天科技联合基金资助项目(6141B061501)
“十三五”装备预研共用技术资助项目(41403060206)。
关键词
三维数字图像相关法
应力测量
立体匹配
3D digital image
Correlation method
Stress measurement
Stereo matching
