The measurement system of laser triangulation integrated with CMM

随着科学技术的不断发展，物体三维轮廓的测量技术得到了飞速的发展，三维造型技术已被广泛应用于模具的设计、方案评审、自动化加工制造及管理维护等各方面。科学研究和工业生产有很多情况需要快速准确地将原有实物转化为计算机上的三维数字模型。目前国内外已经研究出了多种三维轮廓的测量方法，其中激光三角法测量是目前光学测量应用最广泛的方法之一。而运用最为广泛的接触式测量设备是三坐标测量机（CoordinatesMeasurementMachine，CMM）。 激光三角测量法具有非接触、不易损伤表面、材料适应性广、结构简单、抗干扰能力强、测量速度快等的优点；接触式坐标测量机不可避免地存在对被测物表面造成损伤，同...With the development of the science technique, the measurement technique of objects’ three-dimension figure has developed rapidly. Three-dimension geometry sculpting technique has been applied to design of mould, scheme assessment, automatic manufacture and maintenance etc. It needs in science investigation and industry production to convert objects to 3D digital model on computer quickly sometime...学位：工学硕士院系专业：物理与机电工程学院机电工程系_机械电子工程学号：1992006115184

3D vision measurement based on shape from silhouette

提出了一种将SHAPE frOM SIlHOuETTE(SfS)技术应用在三坐标机上的新方法,即用摄像机获取图像,用三坐标机作移动平台,构建视觉测量系统,应用SfS技术对物体进行三维测量。该视觉测量系统扩展了坐标机功能,扩大了其应用范围。实验结果表明,该视觉测量系统具有SfS技术和坐标机两者的优点,重构物体三维模型的过程简单快捷,精度高于0.4MM,其结果可作为坐标机智能测量的基础,是一种非常实用的方法。Shape from Silhouette(SfS) is a passive non-contact 3D measurement method,which is used in 3D modeling and reverse engineering etc.Using SfS method,a simple,low cost,efficient and accurate 3D information acquisition system can be established and the request of the surface material of the object that is measured is low.Compared to laser scanning,SfS can also measure an object with hole.A new method that Shape from Silhouette is applied to measure the objects in coordinate metrology is proposed,that is the vision measurement system is made up of the camera,the coordinate metrology and SfS.Intelligent measurement is carried out on the vision measurement system to 3D reconstruction and consequently the precision is improved.The functions of coordinate metrology are expanded and the applications of coordinate metrology are enlarged by the system.The running experiment results on the vision measurement system show that this system has SfS and coordinate metrology's advantages.The approach to 3D reconstruction is very efficient and the accuracy is higher than 0.4mm.This approach is a much applied way and it can be a foundation of intelligent measurement