Development of Real-time Deformation and Strain Measurement System by Integrated Phase-shifting Grid Method Using Correlation

利用相关性的集成相移网格法开发实时变形和应变测量系统

基本信息

批准号：
12450052
负责人：
MORIMOTO Yoshiharu
金额：
$ 7.62万
依托单位：
Wakayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

项目摘要

In this study, we proposed a novel high-speed and high-accuracy shape, deformation and strain measurement method using a DMD (Digital Micro-mirror Device). We especially proposed the integrated phase-shifting grid method using correlation. We also proposed other phase analysis methods. We developed some systems for these methods. They were applied to a grid projection method, photoelasticity and a laser interferometric method. The conclusions are as follows :.1. Performance of the DMD was confirmed by a computer simulation. As the result, our proposed algorithm is confirmed.2. A DMD reflection-type CCD camera (DMD camera) was structed. The performance was confirmed with a quasi-static experiment that a contour image and an equal-displacement image was obtained by the DMD camera using the phase-shifting scanning moire method.3. Information of the control signals to drive the DMD chip was acquired. A circuit to drive the DMD chip in real-time was designed.4. A novel phase-shifting method for stress analysis in real-time by the photoelasticity was proposed. The experimental setup was built and the validity is confirmed.5. Two-directional integrated phase-shifting method was proposed. It was applied for a simultaneous analysis of two displacement components in moire interferometry.6. An algorithm to apply the integrated phase-shifting method to shape and deformation measurement of continuum objects was developed.7. A phase-unwrapping method using a frequency modulated grating was developed.

在这项研究中，我们提出了一种使用 DMD（数字微镜器件）的新型高速高精度形状、变形和应变测量方法。我们特别提出了利用相关性的集成相移网格方法。我们还提出了其他相分析方法。我们为这些方法开发了一些系统。它们被应用于网格投影法、光弹性法和激光干涉法。结论如下：.1． DMD 的性能通过计算机模拟得到证实。结果证实了我们提出的算法。 2．构造了DMD反射型CCD相机（DMD相机）。通过准静态实验验证了该性能，即采用相移扫描云纹法通过DMD相机获得轮廓图像和等位移图像。 3．获取驱动DMD芯片的控制信号信息。设计了实时驱动DMD芯片的电路。 4．提出了一种利用光弹性进行实时应力分析的新型相移方法。搭建了实验装置并验证了实验的有效性。 5．提出了双向积分移相方法。应用于莫尔干涉测量中两个位移分量的同时分析。 6．开发了一种将集成相移法应用于连续体形状和变形测量的算法。7．开发了一种使用调频光栅的相位展开方法。