基于双频外差和相移法的结构光成像包裹相位解调算法  

Wrapped Phase Demodulation Algorithm of Structured Light Imaging Based on Dual-frequency Heterodyne and Phase Shift Method

作　　者：谷倩倩 吕珊珊[2] 姜明顺[1] 张雷[1] 张法业[1] 隋青美[1] GU Qian-qian;LYU Shan-shan;JIANG Ming-shun;ZHANG Lei;ZHANG Fa-ye;SUI Qing-mei(School of Control Science and Engineering,Shandong University,Jinan 250061,China;Institute of Marine Science and Technology,Shandong University,Qingdao 266237,China)

机构地区：[1]山东大学控制科学与工程学院,山东济南250061 [2]山东大学海洋研究院,山东青岛266237

出　　处：《仪表技术与传感器》2020年第3期105-109,共5页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(41472260,61505097,11504201);山东大学基础研究基金项目(2016JC012);山东省自然科学基金项目(ZR2017PEE023);山东省重点研究开发计划(2017CXGC0610);山东大学青年学者项目(2016WLJH30)。

摘　　要：针对现有相位解调算法存在周期错位以及相位突变导致的错误累积等现象,提出了一种基于双频外差和相移法的相位解调算法。通过实验验证了该算法的可行性,并且可以很好地解决由于外界环境因素或者被测对象自身的不连续性导致的相位误差,测量结果更加准确可靠,同时所需投影的光栅图像相对较少,测量速度快,测量精确度高。For the existing phase demodulation algorithm,there were periodic dislocation and error accumulation caused by phase mutation.A phase demodulation algorithm based on dual-frequency heterodyne and phase shift method was proposed.The feasibility of this phase demodulation algorithm was verified by experiments.In addition,phase errors caused by external environmental factors or discontinuity of the measured object can be well solved.The measurement results are more accurate and reliable.At the same time,the projected raster images are relatively few,the measurement speed is fast and the measurement accuracy is high.

关 键 词：结构光 相位解调 多频外差 相移法 包裹相位 绝对相位 

分 类 号：O439[机械工程—光学工程]