摘要
在深入分析中心折反射全景相机成像原理的基础上,提出了一种测量旋翼共锥度的新方法。用安装在直升机桨毂上与旋翼同步旋转的折反射全景相机获取直升机3片桨叶的全景图像。根据桨叶上标定块角点坐标与全景图像坐标对应关系,给出了标定块相对于全景相机的外参数计算方法,推导了一组根据平面标定块位置参数计算旋翼共锥度的公式。全景相机在直升机桨毂上的安装无特殊要求,通过变换标定块位置,可实现旋翼任意位置的共锥度计算,与以前测量方法相比具有很大的灵活性。实验结果表明,此方法误差在±5mm以内。
According to the investigation of the imaging model for central omnidirectional cameras, a new measurment method for rotor pyramid angle is proposed. The omnidirectional camera installed on the hub of helicopter rotates with the rotor to take the picture of the planar grids pasting on the rotor blade. According to the grid corners coordinates and their associated image values, a method for calculating the planar grid^s extrin- sic parameters is given, and a group of equations are also given to calculate the helicopter blade pyramid angle. There is no special requirements for the installing of the omnidirectional camera on the hub of helicopter. By changing the position of the planar grids, the pyramid angle on arbitrary position of the rotor blade can be calcu- lated. So it is a flexibility approach compared with existing measuring methods. Experimental results show that the error of this method is within ±5 mm.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2013年第2期441-446,共6页
Systems Engineering and Electronics
基金
国家自然科学基金(61175089
61203255)
中央高校基本科研业务费专项资金(HEUCF041214
HEUCF110423
HEUCFZ1210)
博士后研究人员落户黑龙江科研启动资助金(LBH-Q11135)资助课题
关键词
旋翼共锥度
全景视觉
全景相机标定
统一成像模型
helicopter blade pyramid angle
panoramic vision
omnidirectional camera calibration
unified projec- tion model
