数字散斑相关方法的原理与应用

PRINCIPLE AND APPLICATIONS OF DIGITAL SPECKLE CORRELATION METHOD

应用图像识别与变分学原理，对数字散斑相关方法作了理论阐述，导出了测量物体表面变形场的一般过程，将力学中的变形测量问题转化为单纯的数值计算问题，避免了传统光测方法与干涉条纹有关的一系列困难。初步的实验结果表明，该方法在工程实际现场、高速冲击动态过程、细观力学变形过程以及变形测量的自动化等方面都有广泛的应用潜力，从而为光测力学拓展应用领域、实现自动化测量展现了新的前景．

This paper presents theoretical description for digital speckle correlation methodwhich is based on variational and image recognition principle。The problem of deformationmeasurement is then converted into a pure numerical computation, in which the difficultiesdue to interferometric fringes in conventional optical methods can be avoided.Primaryexperiments indicated that the method can be applied in engineering environments,andis capable of measuring deformations quantitatively in high speed dynamic process andmicromechanics。