飞行时间成像系统的数字仿真技术*(5)
6 结 论
本文针对小行星着陆应用需求,研究了飞行时间成像的光传输模型,建立了基于环境光照条件的飞行时间成像的数字仿真模型,该模型集成了完善的光源模型、光传输模型、场景表面反射模型、传感器电路模型和传感器噪声模型,可根据飞行时间传感器参数集对预设三维场景的光照条件生成飞行时间成像的数字仿真计算结果,给出包括二维灰度图像数据和三维深度的高程图像数据,并具备了完善的环境光条件影响机理模型,进行联合仿真验证试验,获得了明确的稳定的验模数据和验证结果.同时扩充了数字仿真系统的仿真对象的参数集范围,实现了对传感器的光源峰值功率、空间分辨率、积分时间、信号读出时间等主要参数的仿真优化,实现了对环境光影响相关参数的实时动态调整.该系统建立了基于小行星着陆应用数字仿真的研究验证平台,对于具有光照条件作用的飞行时间成像系统三维信息获取和以飞行时间成像系统作为数据源的三维信息算法以及方案的优化研究验证和评估具有重要的意义.
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