飞行时间成像系统的数字仿真技术

飞行时间传感器的仿真主要用于评估基于光相位信息的深度数据的处理算法，现有的方法包括基于对场景三维模型生成的特定噪声模式的仿真模型和基于光信号传播的物理过程仿真模型两大类，为飞行时间成像系统建立了特定的仿真平台.但现有的工作并未考虑环境光干扰对测量数据间的非线性耦合关系，而这种关系是附着/着陆敏感器的重要设计要素之一.本文针对小行星附着任务的需求，研究并建立了包含环境光矢量的飞行时间成像仿真环境，验证了包括环境光模型的飞行时间成像仿真方法，对于飞行时间成像技术在光照条件下的成像性能的评估具有重要意义和应用前景.

1Computer Simulation Technology of Time of Flight Imaging System

The simulation of the time of flight sensor is mainly used to evaluate the processing algorithm of the depth data. Existing simulation models include two types,one is based on a specific noise pattern generated from a three dimensional model of a scene,and the other one is a physical process simulation model based on optical signal propagation. The simulation model of time of flight imaging is implemented based on physical processes of optical signal propagation. The system is oriented to the needs of engineering applications.The full physical process of time of flight imaging is modeled, and the simulation parameters are set according to specific sensors.The depth data of the scene is generated the impact of parameter changes on depth data is evaluated and this model is used to analyze typical errors in time of flight imaging.