【摘要】 通常准确测量物体的突变形面,采用一种双频变精度方法.该方法测量周期长,动态性较差,所以提出了基于虚拟复合光栅投影的三维轮廓测量技术.在计算机上模拟生成虚拟光栅,将两种频率的光栅合成为投影复合光栅进行测量.本文给出了这种测量技术的原理,实验结果表明,采用复合虚拟光栅投影三维形貌测量技术可以有效地解决相位展开所产生拉线的困难,实验效果较好.更多还原

【Abstract】 A dual-frequency measurement method with variable precision is often used to measure object’s shape with sudden surface changes.The measurement period of this method is long and its dynamic nature is relatively poor.Therefore,a 3-D measurement technology based on compound virtual grating projection was proposed,in which the virtual grating was computer-generated and two virtual gratings with different frequencies were combined into a complex one.In this paper,the principle of technology was presented.The result shows that the problem on phase unwrapping of the object with backguy can be resolved by the technology.更多还原