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| 激光散斑干涉法面内及离面变形同步测量与全场应变分析技术研究 |
| Investigation on in-plane and out-of-plane deformation simultaneous measurement and all strain components determination approach by utilizing laser speckle interferometry |
| 投稿时间：2024-08-16 修订日期：2025-01-07 |
| DOI： |
| 中文关键词: 散斑干涉 三维变形同步测量 窗口自适应相位滤波；差分法全应变提取 |
| 英文关键词:speckle interferometry simultaneous measuring 3D deformation window-adaptive phase filtering full-strain determined by numerical differential |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 为满足激光电子散斑干涉方法对不可重复变形中所有变形及应变的同步测量需求，本文提出了三波长激光干涉技术同步测量三维全场变形，并直接使用数值差分计算方法快速确定全场全应变值的技术。利用红、绿及蓝三色激光同步传感试样表面的离面和两个面内变形，并由一个3CCD相机记录彩色散斑干涉图；通过色彩分离和四步相移技术获取三维变形的定量信息，对包含变形信息的图像进行滤波处理后，直接采用数值差分确定出全场全应变分量值。文中通过对典型试样的变形测量与应变分析展示了该方法的处理过程及其有效性。 |
| 英文摘要: |
| To meet the requirement of full deformation and strain component measurement by using laser speckle interferometry, which is necessary for the experimental research of the unrepeatable deformation. An electronic speckle pattern interferometry(ESPI) system was introduced in this paper. In this ESPI system, tri-wavelength lasers lights were used to independently sense two in-plane and out-of-plane deformation components, respectively. The three dimensional (3D) deformation information encoded by color speckle patterns was recorded by a 3CCD color camera. The color speckle interferograms were split into their red, green and blue components, and the 3D deformation data were quantitively determined by utilizing phase-shifting method and were furtherly denoised by phase filtering. Full strains were calculated by applying numerical differential operation on the unwrapped phase images. Experimental performance on the test sample demonstrated the data process and verified the validation of the proposed method. |
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