基于多光束数字全息干涉技术的曲表面动态三维变形测量方法研究

项目名称： 基于多光束数字全息干涉技术的曲表面动态三维变形测量方法研究

项目编号： No.11302152

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 史红健

作者单位： 同济大学

项目金额： 25万元

中文摘要： 如何精确测量动态三维变形是进行动力学特性研究时的一个关键问题，传统的测量方法依靠接触式的传感器无法得到全场信息，光学测量技术具有非接触、全场测量的特点，这为研究这一问题提供了新的途径。尽管光学测量技术在材料试验和研究中已经得到了广泛的应用，然而针对曲表面试件的应用至今尚不够完善，其主要原因是不能忽略因几何形状而引起的灵敏度矢量变化所带来的影响。这就要求我们在测量三维变形的同时，还必须考虑曲表面几何形状的影响。针对这一问题，本项目利用基于多光束数字全息干涉的测量技术和高速数字图像采集技术相结合，建立一种新的能够满足曲表面动态三维变形非接触、高分辨和全场测量的光学测量系统以及编制相应的处理软件。该测量系统采用将四幅全息图同时记录于一幅数字图像中并独立重构各自相位的技术，可实现形貌与三维变形的同时测量，能够适用于各种瞬态或者周期性变形测量，为动力学特性分析提供可靠的实验测试手段。

中文关键词： 曲表面；多光束数字全息干涉；三维变形；动态测量；

英文摘要： How to measure dynamic three-dimensional deformation accurately is a key issue in the research of dynamics characterization of materials and structures.The traditional measurement method is to use the contact sensor and full-field information can not be achieved.Optical measurement techniques have the advantage of being full-field and non-contact and provides a new way for studying this issue. While the application of optical measurement techniques in materials testing and research has already achieved some acceptance in research and industry, its application to curved components has been limited, the main reason for this is that we can not ignore the influence of the sensitivity vector caused by the geometry on measuring three-dimensional deformation of the curved surface. This requires that the geometry and consequently the local variation of the sensitivity vector should be taken into consideration if deformations in three dimensions have to be measured on curved surface. To solve this problem， a novel non-contact measurement system that combines multi-beam digital holographic interferometry and high-speed digital image acquisition technology is proposed for dynamic three-dimensional deformation measurement on curved surface.The measurement system is based on the principle of the recording of four holograms

英文关键词： curved surface；multi-wavelength digital holography interferometry；three-dimensional deormation；dynamic measurement；