基于相移原理的便携式岩石三维形貌测量系统  

Portable rock 3-d profilometry system based on phase shifting

作　　者：秦大辉[1,2] 毛婷[1] 刘建军 

机构地区：[1]西南石油大学土木工程与建筑学院,四川成都610500 [2]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318

出　　处：《辽宁工程技术大学学报（自然科学版）》2012年第4期504-507,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50874082);东北石油大学提高油气采收率教育部重点实验室资助项目(DYKFJJ2010-2)

摘　　要：针对岩石表面形貌复杂的特点和测量精度高的要求,提出了一种基于数字光栅相移原理的便携式岩石三维测量技术,该技术由相位移法、外差原理和相位高度映射三部分组成.相位移法和外差原理相结合能够自动完成相位展开,同时保持相移法原有的相位求解精度;然后根据相位展开后的相位图,利用相位高度映射算法来完成岩石的三维形貌测量.利用基于多频外差原理的三维测量技术建立了一套三维测量系统,该系统由一个CCD摄像机和一个数字光栅投影器组成.利用上述系统对一块岩石进行了测量实验,结果表明:该系统能够准确地完成岩石测量.This paper presents a portable rock 3-D profilometry technology based on phase shift using digital fringe.The technology consists of phase shifting,heterodyne principle and phase-height mapping.Combination of phase shifting and heterodyne principle can make automatic phase unwrapping and keep the precision of phase shifting.Subsequently,according to the unwrapping phase map,the rock 3-D profilometry can automatically accomplished using phase-height mapping.A 3-D measurement system consisting of one camera and a digital fringe projector was developed according to the method.In a case study,a rock sample was measured.The reconstructed 3-D rock sample model is very smooth with details.The results show that the system can accurately measure rock samples.

关 键 词：岩石力学 三维形貌测量 相位移 条纹投影 空间相位展开 时间相位展开 结构光 数字光栅 

分 类 号：P58[天文地球—岩石学]