三维形貌测量中单频相移条纹相位展开方法  

Phase Unwrapping Method Using Single Frequency Phase Shifting Fringe Patterns in 3D Surface Measurement

作　　者：许少毅[1] 冯廷宇 邢方方 沈涛[3] XU Shao-yi;FENG Ting-yu;XING Fang-fang;SHEN Tao(School of Mechatronic Engineering,China University of Mining and Technology,Xuzhou 221116,China;Xuzhou College of Industrial Technology,Xuzhou 221116,China;Heilongjiang Province Key Laboratory of Laser Spectroscopy Technology and Application,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116 [2]徐州工业职业技术学院,江苏徐州221140 [3]哈尔滨理工大学黑龙江省激光光谱技术与应用重点实验室,哈尔滨150080

出　　处：《哈尔滨理工大学学报》2022年第5期1-8,共8页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(52174153、51607178);中国博士后科学基金(2018T110570、2019M652005);中国矿业大学英才培育工程专项项目(2021YCPY0109);江苏省高等学校基础科学(自然科学)研究项目(21KJB460027)。

摘　　要：针对传统相移轮廓术所需采集条纹图数目多、测量效率低的问题,提出了一种傅里叶变换轮廓术辅助相移法展开包裹相位的融合方法。先通过相移法计算出单一高频相移条纹的包裹相位,再对高频相移条纹采用傅里叶变换轮廓术得到初步展开相位,结合初步展开相位计算包裹相位的条纹级次,根据条纹级次展开包裹相位得到最终展开相位。该方法只需要单一高频相移条纹图,即可得到物体相位信息。通过仿真和实验将该融合方法与传统方法进行了比较,结果表明,所提融合方法较相移轮廓术所需采集的条纹图数量减少66.7%,避免了傅里叶变换轮廓术频谱选择导致的物体细节信息的丢失,计算的相位精度更高,并对滤波窗口的选择不敏感。In order to solve the problem of low measurement efficiency in traditional phase shifting profilometry,a phase unwrapping method using Fourier transform assisted phase-shifting method is proposed.The preliminary unwrapped phase is obtained by Fourier transform for the high-frequency phase-shifting fringe.Combined with the wrapped phase calculated by the phase-shifting method,the fringe order of the wrapped phase can be calculated.Then the final unwrapped phase is obtained according to the fringe order.With this method,only single high-frequency phase-shifting fringe patterns are needed to obtain the object phase information.The results show that compared with the phase-shifting method,the number of fringe patterns needing to be captured by the proposed method reduce 66.7%.Compared with the Fourier transform method,the phase accuracy calculated by the proposed method is higher.The proposed method has better detail information and is not sensitive to the selection of the filter.

关 键 词：三维测量 傅里叶变换轮廓术 相移轮廓术 条纹级次 相位展开 

分 类 号：TH86[机械工程—仪器科学与技术]