Digital Image Correlation
释义 Definition
数字图像相关(DIC):一种非接触式光学测量方法,通过对比物体在受力/变形前后拍摄的图像,追踪表面纹理(常见为“散斑”)的位移,从而计算位移场与应变场。常用于材料测试、结构力学与实验力学中。(也可扩展为3D-DIC/立体DIC。)
发音 Pronunciation (IPA)
/ˈdɪdʒɪtəl ˈɪmɪdʒ ˌkɔːrəˈleɪʃən/
例句 Examples
Digital image correlation helps us measure how a material stretches.
数字图像相关能帮助我们测量材料是如何被拉伸的。
Using digital image correlation, the team quantified full-field strain around the crack tip under cyclic loading, revealing localized deformation that strain gauges missed.
团队使用数字图像相关,在循环载荷下定量分析了裂纹尖端附近的全场应变,揭示了应变片未能捕捉到的局部变形。
词源 Etymology
该术语由三部分构成:digital(数字的)强调使用数字图像与计算处理;image(图像)指相机采集的表面图像;correlation(相关/相关性)来自统计与信号处理中的“相关”概念,表示用相关算法在两幅图像中匹配同一纹理区域的位置变化,从而得到位移与应变。
相关词 Related Words
文献与著作 Literary / Notable Works
- Sutton, Orteu & Schreier, Image Correlation for Shape, Motion and Deformation Measurements: Basic Concepts, Theory and Applications(2009)
- Schreier & Sutton, Digital Image Correlation: A Practical Guide(常见教材/指南版本与章节在实验力学课程中引用)
- Bruck et al., “Digital image correlation using Newton–Raphson method of partial differential correction”(1989,经典早期论文之一)
- Pan, Qian, Xie & Asundi, “Two-dimensional digital image correlation for in-plane displacement and strain measurement: a review”(综述类代表性论文)