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近年来,光学非接触三维面形测量技术被深入研究和广泛应用,其中常采用的技术方案是投影一个载频条纹到被测物体表面,利用成像设备从另一个角度记录受被测物体高度调制的变形条纹图像,再从中解调重建出被测物体的三维面形分布。与单帧图像的傅里叶条纹分析方法相结合,这种基于条纹投影的调制和解调技术被拓展应用到动态过程(物体)的三维面形测量和重建中,以满足日益增长的动态过程分析需求。回顾了近年来在基于条纹投影和傅里叶分析的动态过程三维面形测量以及薄膜振动模式检测研究中的进展,讨论了不同动态过程的测量方法和测量系统,给出了相关应用的实验结果。讨论了该技术的优点和面临的挑战,并指出了该领域今后的发展动向。
In recent years, optical non-contact three-dimensional surface measurement technology has been extensively studied and widely used, of which the technical solution is often used to project a carrier frequency stripe to the surface of the measured object, the use of imaging equipment from another angle recorded by the measured object height modulation Of the deformed fringe image, and then demodulate and reconstruct the three-dimensional surface distribution of the measured object. Combined with the Fourier fringe analysis of single-frame images, this streak-projection-based modulation and demodulation technique is extended to 3D surface profiling and reconstruction of dynamic processes (objects) to meet the ever-increasing dynamic processes Analyze the demand. In the recent years, the progress in the research of three-dimensional profile measurement and the vibration mode detection of thin films based on fringe projection and Fourier analysis is reviewed. The measurement methods and measurement systems of different dynamic processes are discussed, and the experimental results of related applications are given . Discusses the advantages and challenges of the technology, and points out the future development trend in this field.