光子学报, 2018, 47 (2): 0212002, 网络出版: 2018-01-30
数字散斑干涉术和时空三维相位解包裹用于非连续表面动态变形测量
Dynamic Deformation Measurement of Discontinuous Surfaces Using Digital Speckle Pattern Interferometry and Spatiotemporal Threedimensional Phase Unwrapping
电子散斑干涉术 变形测量 动态测量 相位分布 振动测量 相位解包裹 非连续表面 Electronic Speckle Pattern Interferometry (ESPI) Deformation measurements Dynamic measurements Phase distribution Vibration measurement Phase unwrapping Discontinuous surface
摘要
为解决传统相位解包裹法不能够用于非连续表面的动态变形测量的缺点, 在详细阐述基于时空三维相位解包裹技术的数字散斑干涉术的工作原理和测量步骤基础上, 应用数字散斑干涉术和时空三维相位解包裹测量非连续表面动态变形.实验证明, 当采用每秒70帧的普通相机拍照时, 可实现最快形变速率为25.12 μm/s的非连续表面动态变形测量.本文所提方法扩展了数字散斑干涉术的测量范围, 增强其应用能力.
Abstract
Digital Speckle Pattern Interferometry (DSPI) with a Spatiotemporal Threedimensional Phase Unwrapping (STPU) is used to measure the dynamic deformation distributions with the presence of object discontinuities. It overcomes the phase unwrapping failure of traditional DSPI in such conditions. Elaborate description of the measurement priciple and procedure of the DSPI with STPU is given. The experiments exibited that dynamic deformation of discontinuous surface, with a maximum deformation rate of 25.12 μm/s, can be determined perfectly by the proposed method while an ordinary camera with 70 fps was used. The research benefits the enlargement of the application areas of DSPI and the improvement of its applicability.
吴思进, 杨靖, 潘思阳, 李伟仙, 杨连祥. 数字散斑干涉术和时空三维相位解包裹用于非连续表面动态变形测量[J]. 光子学报, 2018, 47(2): 0212002. WU Sijin, YANG Jing, PAN Siyang, LI Weixian, YANG Lianxiang. Dynamic Deformation Measurement of Discontinuous Surfaces Using Digital Speckle Pattern Interferometry and Spatiotemporal Threedimensional Phase Unwrapping[J]. ACTA PHOTONICA SINICA, 2018, 47(2): 0212002.