为准确测量金属表面的受热形变, 基于激光电子散斑干涉测量原理搭建了实验平台, 实现了对金属受热形变的测量, 经过数字图像处理, 得到了金属表面形变的三维图形。为了优化测量效果, 依托现有条件对所用激光光源进行了处理, 并比对了不同粗糙度的物体测量效果。结果表明, 使用经小孔滤波处理后的激光光源, 可以得到效果更好的散斑图, 而且粗糙的物体散斑对比度较高, 可以有更高的测量准确度。所做工作可为测量金属表面形变提供实验方法, 同时为提高散斑测量精度提供参考依据。

To precisely measure the heating metallic deformation, an experimental platform based on the principle of laser electronic speckle pattern interferometry(LESPI)was proposed. After image processing, the three-dimensional displacement of deformation was obtained. To optimization the results, the laser was disposed and the effects of measurement with different roughness objects were contrasted. The results showed that better specklegram will be obtained with laser after pinhole filter and objects with higher roughness. The research provides experiment method for the metallic deformation measurement and reference to improve measure accuracy.