回转体三维扫描形貌测量及其应用  

3D Scan Method for Measurement of Profile and Its Application

作　　者：陆鹏[1] 张熹[1] 

机构地区：[1]中国船舶重工集团公司第七一一研究所,上海200090

出　　处：《实验力学》2012年第2期155-159,共5页Journal of Experimental Mechanics

基　　金：国家自然科学基金(11072151)资助

摘　　要：本文提出一种测量三维形貌的扫描系统,该系统可被用于测量回转体的三维形貌。激光光刀被投射在被测物体表面,由于被测物体表面的形貌而改变了光刀的弯曲方式,摄像机将变形后的图像采集到计算机中。当被测物体放置在转台上旋转一周时,相应的一系列光刀变形的图片被采集到计算机中,这一系列图片包含了物体表面形貌的全部信息。通过连续扫描采集系列图片并计算,最终可以获得整个被测物体的三维形貌。当被测物体直径在一百毫米左右尺寸范围内的测量灵敏度可到0.01mm,其它尺寸范围要更换成像系统,才能达到相应的灵敏度。本文给出了两个较为复杂模型的三维形貌测量结果。该结果表明,本系统在对回转体表面形貌的测量方面具有一定的技术难度和广泛的工程需求,本文的研究具有重要的参考价值。Scan method for measurement of profile with simple setup is proposed. This scan system can be used easily to measure cylindrical objeet＇s 3D profile. A laser light-knife is projected onto the surface of object. And this laser light-knife will be twisted or changed according to the profile of object＇s surface. Then, the CCD and camera will capture and store the scene （frame） into computer. When we rotate the object even speed a lap（360°） , while the light-knife is fixed corresponding to the object, a serial of picture including the information of distortion will be recorded into computer. Finally, we get the whole 3D profile of object via assembling the information above mentioned. This is an effective system for measurement of profile. The sensitivity of this system will be arrived at 0.01ram when the yardstick of object is about one hundred millimeters. On the other hand, the image- forming system will be changed accordingly including CCD ＆ lens when we measure other dimension extension. In this paper the experimental result for measuring the profile of complex model is put forward. In the same way, we can obtain other complex surface profile rapidly and successfully. So, this method and system will be widely used in engineering metrical field.

关 键 词：三维扫描 光刀 三维形貌 

分 类 号：TG115.28[金属学及工艺—物理冶金]