【作者】 谭优；

【导师】 王泽勇；

【作者基本信息】 西南交通大学 ， 光学工程， 2008， 硕士

【摘要】 光学三维面形测量方法,以其非接触、测量速度快、精度高、易于在计算机控制下进行自动化测量等优势而得到深入研究和广泛应用。在众多的主动三维传感技术中,傅立叶变换轮廓术(Fourier Transform Profilometry,简称FTP)使得物体动态过程的测量变得可能,因为它只需要一帧参考条纹图和一帧变形条纹图就能将物体的三维形貌恢复出来。它的基本思想是利用信号的频谱特性来恢复被测物体的面形。在工业生产流水线上产品质量的在线检测、冲压板几何形状检测、智能机器人运动控制、汽车制导中障碍检测、运动力学等方面,都需要对观察对象进行三维面形的测量。因此动态过程的三维面形测量在科学研究和工程应用领域具有重要意义。本论文首先介绍了三维面形测量技术的重要意义和研究现状,并总结前人的研究成果,给出了几种目前应用最为广泛的主动式光学三维传感方法的基本原理,比较了其优缺点。文中重点介绍了傅里叶变换轮廓术的基本原理和方法,在此基础上推导出基于FTP的动态过程三维面形测量技术的基本原理;给出了几种三维相位场的计算方法和三维截断相位场展开方法的详细推导过程,并对其性能进行评价。本文还就光学三维面形测量中的难点问题—相位展开,展开了更深入的调查研究,从其问题的提出、研究现状到算法的具体内容都进行了详细的阐述;针对实测对象,最终形成了一套完整的测量技术方案,选择了恰当的数据处理方法对采集的图像数据进行处理分析,获得了满意的结果。更多还原

【Abstract】 Optical three-dimensional (3D) non-contact profilometry, with the excellence in high speed, high accuracy and easily controlled by computer, has been widely used and studied. In many kinds of activity 3D profilometry, Fourier Transform Profilometry(FTP) that requires only one frame of the deformed fringe pattern and one frame of reference fringe pattern makes real-time data acquiring and processing of dynamic process possible. Its foundation principle is to get the 3D shape sizes with the frequency characteristic of signal.3D shape measurement has been widely used in many fields, such as produce quality on-line detecting of industry pipelining, striking board geometry shape detecting, and intelligent robot movement controlling, locomotion mechanics. So it is on a very important status in the field of science study and project application.This paper firstly provides introduction of importance and current study condition of 3-D shape measuring technique. It summarizes the former study outcome, presenting several popular basic principles of actively optical 3-D transduction methods and comparing their merits and demerits. It gives high emphasis on principle and methods of FTP profilometry. Based on the above-mentioned methods, it acquires the fundamental principles of dynamic process 3-D FTP shape measuring technique, putting forward the elaboration of several 3-D phase calculation methods and 3-D unwrapping phase methods, and evaluating its function. Besides, this thesis probes into the difficult problem of phase, elaborating the raise of the problem, the present study condition and the arithmetic. Aimed at the measuring subject, it achieves a set of complete measurement technique plan, conducts analysis of collecting image data with appropriate data management method and fulfilled satisfying effect.更多还原