基于飞行时间相机的轨道三维成像方法研究

Research on a fast 3D imaging of rail based on Time-of-Flight camera

高速铁路的快速发展对轨道的实时性检测要求越来越高。为满足轨道检测的速度和三维成像需求,提出一种基于飞行时间相机的轨道检测方法。飞行时间相机通过计算光在空气中的往返时间来获取目标的强度信息和深度信息;通过改变相机的成像深度范围从轨道点云数据中粗提取出轨道信息,利用相机输出的二维图像和深度数据实现对轨道信息的精提取,快速获得轨道的三维数据;搭建实验平台,利用相机拍摄不同成像深度的轨道图像,经处理后得到轨道的几何尺寸和体积。

The real-time measurement of rail is more important with the rapid development of high-speed railway.A fast 3D imaging based on the Time-of-Flight camera is proposed to meet the speed and 3D imaging requirements of rail detection.Refer to calculate the round-trip time of light in the air,Time-of-Flight camera obtains the intensity and depth information of object.The rough rail data is extracted from the rail point-clouds by changing the imaging depth of the camera,and the precise data is obtained by combining the 2D images with the depth data.Then the 3D data of rail is quickly obtained.An experimental platform was set up to take the rail images with different imaging depths,and the physical dimensions and volume of rail were figured out.