三维动态变形的数字全息测量理论及关键技术研究

The demanding requirements of product quality and reliability in advanced manufacturing engineering has led to the need for highly efficient methods for measuring three dimensional dynamic deformation and strain that should be full-field and non-contacting. It has become one of the most popular research topics worldwide. The project proposes a novel digital holographic technique based on multi-spatial frequency to achieve the precision measurement of full-field and three-dimensional dynamic deformation and strain. The key innovations of this research include: (1) to achieve simultaneous recording of three interferograms in a single image based on multi-spatial frequency theory; (2) to study and optimize the key technologies and the algorithms of the spatial phase shift technique for accurate measurement of the phase distribution from a single interferogram; (3) to separate three interferograms from the single image recorded and to achieve the dynamic measurement of three-dimensional deformation and strain; (4) to build the experimental system, to validate measuring accuracy based on the theory and experimental method; (5) To evaluate the measurement accuracy of the multi-spatial frequency digital holography. The successful completion of this project will help improve national wide the testing capabilities for novel engineering materials in a variety of complex conditions. The core of the research results will enable the country in this research area is technically independent intellectual property rights. It will has an important significance for promoting the development and application of dynamic measurement for three-dimensional deformation and strain measurement.

随着航空航天与现代制造技术的迅速发展，对新型工程材料的检测与质量评价的要求越来越高，全场非接触三维动态变形及应变测量技术已经成为国际热点研究课题。本项目研究一种基于多空间频率的数字全息技术来实现新型工程材料的全场三维动态变形及应变的精密测量，主要研究内容:(1)研究实现同步记录三幅干涉图于单一图像的多空间频率数字全息理论与方法；(2)研究和优化空间相移技术从单一干涉图精确测量相位分布的关键技术及算法；(3)研究三干涉图分离技术，实现三维变形及应变的动态测量；(4)构建实验系统，验证相关理论和方法的有效性；(5)评价基于多空间频率的数字全息测量精度。本项目的开展有助于提高我国航空航天领域对新型工程材料在各种复杂条件下的测试能力，研究成果将使我国在该研究领域掌握核心技术，对于推动三维动态变形及应变测量技术的发展与应用具有重要意义。

随着航空航天与现代制造技术的迅速发展，对新型工程材料的检测与质量评价 的要求越来越高，全场非接触三维动态变形及应变测量技术已经成为国际热点研究课题。本 项目研究一种基于多空间频率的数字全息干涉技术，以实现新型工程材料的全场三维动态变形及 应变的精密测量，主要研究内容:(1)研究实现同步记录三幅干涉图于单一图像的多空间频率数字全息理论与方法；(2)研究和优化空间相移技术从单一干涉图精确测量相位分布的关键技术及算法；(3)研究三干涉图分离技术，实现三维变形及应变的动态测量；(4)构建实验系统，验证相关理论和方法的有效性；(5)评价基于多空间频率的数字全息测量精度。经过项目研究，项目组明确了数字全息干涉动态变形测量的数学模型，设计了不同的光路布局形式，给出了光路关键参数的设计依据，提出了干涉图分离算法和干涉相位提取算法以及实现方法。本项目的研究成果有助于提高我国航空航天领域对新型工程材料在各种复杂条件下的测试能力，使我国在该研究领域掌握核心技术，对于推动三维动态变形及应变测量技术的发展与应用具有重要意义。