水下同步扫描三角测距成像理论建模及仿真分析

Theoretical modeling and simulation analysis of underwater synchronous scanning triangulation imaging system

针对激光同步扫描三角测距成像系统水下应用时,考虑不同介质界面的折射效应,通过理论建模,得出水下同步扫描三角测距成像系统的空间三维坐标测量关系表达式。分析了基线距离、接收透镜焦距等系统主要参数对距离测量分辨率的影响,以及成像探测器长度对测量范围的影响。仿真结果表明:增大基线距离和接收透镜焦距,有利于提高距离测量分辨率,增加成像探测器长度,有利于增大系统测量范围,为水下同步扫描三角测距成像系统的设计提供了理论依据。

Considering the refractive effects of different media interfaces, for underwater applications of laser synchronous scanning triangulation imaging system, the spatial threedimensional coordinate measurement expression of the underwater synchronous scanning triangulation distance imaging system was obtained through theoretical modeling. The influence of the main parameters ,such as the baseline distance and the receiving lens focal length, on the resolution of the distance measurement and the effect of the length of the imaging detector on the measurement range were analyzed. Through the simulation, we find that the increase of the baseline distance and the focal length of the receiving lens can improve the distance measurement resolution and the increase of the imaging detector length can increase the system measurement range. The simulation results show that increasing the baseline distance and the focal length of the receiving lens is beneficial to improve the resolution of the distance measurement, and the increase of the length of the imaging detector is beneficial to increase the system measurement range.The research work provides a theoretical basis for the design of the underwater synchronous scanning triangulation distance imaging system.