基于光刀旋转扫描法的三维传感技术  

3D sensing based on laser-knife rotating scan

作　　者：黄宇豪 麦家全 易映萍[1] Huang Yuhao;Mai Jiaquan;Yi Yingping(School of Optical Electronic Information and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,Chin)

机构地区：[1]上海理工大学光电信息与计算机工程学院

出　　处：《电子测量技术》2018年第11期88-93,共6页Electronic Measurement Technology

基　　金：青年科学基金(51707121)项目资助

摘　　要：为了减小基于传统光刀投影法的三维传感仪器的设备体积,根据激光刀三维传感的原理,提出了一种新型的扫描法,即光刀旋转扫描法。该方法通过将激光刀投射到待测物,再附加绕光刀出射方向中心线的旋转扫描,同时摄像设备从另一角度记录受待测物表面凹凸所调制的光刀影像,再通过算法获取待测物的三维数据;采用模型分析证明了该方法中绕光刀出射方向中心的转动比传统方法中绕旋臂中心的转动更节省工作空间;基于光刀旋转扫描法的三维传感仪器可通过不同参数来改变测量距离和精准度。本实验在测量5 000mm处物体时,柱坐标中的极径和高的相对误差分别能控制在0.001 744 1和0.001 792 5,实验验证了该方法具有较高的准确性,在获取小范围的三维数据以及制作轻便的三维传感设备方面有较大优势。In order to reduce the volume of the 3 Dsensor based on conventional laser-knife projection,according to the rationale of laser-knife-based 3 Dsensing,we propose a new scanning method which is named Laser-knife Rotating Scan.In this algorithm,laser-knife is projected to the object and rotated around the center line of the exit direction of laser-knife,and the camera records the image of laser-knife that is modulated by the surface of the object so as to acquire the 3 Ddata of the object after calculating.We use the theoretical model to prove that in this algorithm,rotating around the center line of the exit direction of laser-knife occupies less space than rotating around the midpoint of the rotating arm in conventional algorithm.The 3 Dsensor based on Laser-knife Rotating Scan can change the measuring range and accuracy by different parameters.In our experiments when detecting the object at a distance of 5 000 mm,the relative errors of radius vector and height are respectively down to 0.001 744 1 and 0.001 792 5.The experiments show that this method has high accuracy relatively,and has advantages of detecting small area and producing handy 3 D sensors.

关 键 词：三维传感 结构光 光刀投影法 散斑 斜椭圆锥曲面方程 

分 类 号：TN249[电子电信—物理电子学]