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（数字微型摩尔设备）的新型高速和高恰如其形状，变形和应变测量方法。我们特别提出了使用相关性的集成相移网格方法。我们还提出了其他阶段分析方法。我们为这些方法开发了一些系统。它们被应用于网格投影方法，光弹性和激光干涉方法。结论如下：.1。通过计算机模拟确认了DMD的性能。结果，我们提出的算法得到了证实。2。制定了DMD反射型CCD摄像头（DMD摄像头）。通过准静态实验证实了性能，即使用相移扫描Moire方法通过DMD摄像头获得轮廓图像和等位置换图像3。获取了驱动DMD芯片的控制信号的信息。设计了一个实时驱动DMD芯片的电路4。提出了一种通过光弹实时进行应力分析的新型相位转移方法。建立了实验设置并确认有效性5。提出了两方向综合相位转移方法。它用于对Moire干涉法中两个位移成分的同时分析6。开发了一种将集成的相位转移方法应用于连续对象的形态和变形测量的算法。7。开发了一种使用频率调制光栅的相位未包装方法。