“祝融号”火星车立体视觉系统的几何自检校

Self-calibration of Zhurong Mars rover s stereo vision system

“祝融号”是我国首个成功在火星表面开展巡视探测的火星车。为了确保火星车遥操作任务精准的实施,需要对立体视觉系统实施自检校。本文提出了附有立体约束和桅杆机构运动约束的联合平差自检校模型。经过模拟试验证明本文提出的自检校方法具有较高的视觉定位精度。在火星真实试验中,获得检核点中误差的平均值为12.3 mm。有效保障了“祝融号”火星车精准地完成遥操作任务。

Zhurong is the first rover of China to detect the Martian surface successfully.It is necessary to carry out self-calibration of the stereo vision system in order to ensure the accurate implementation of the teleoperation mission of Zhurong Rover.The combined adjustment self-calibration model with stereo constraint and mast mechanism motion constraint is proposed.Simulated experiments show that the proposed method has high visual positioning accuracy.In real experiments on Mars,the average error in the obtained check points is 12.3 mm.This effectively ensures the accurate completion of the teleoperation mission of the Zhurong rover.