杨雨川, 罗晖. 基于角锥棱镜和面阵CCD的动态基座航向角校准[J]. 应用光学, 2009, 30(5): 787-791.
引用本文: 杨雨川, 罗晖. 基于角锥棱镜和面阵CCD的动态基座航向角校准[J]. 应用光学, 2009, 30(5): 787-791.
YANG Yu-chuan, LUO Hui. Course angle calibration of dynamic base with retro-reflector and CCD[J]. Journal of Applied Optics, 2009, 30(5): 787-791.
Citation: YANG Yu-chuan, LUO Hui. Course angle calibration of dynamic base with retro-reflector and CCD[J]. Journal of Applied Optics, 2009, 30(5): 787-791.

基于角锥棱镜和面阵CCD的动态基座航向角校准

Course angle calibration of dynamic base with retro-reflector and CCD

  • 摘要: 研究用于飞行器等动态基座航向角校准的大范围、中高精度航向角度测量系统。系统采用2个面阵电荷耦合装置(CCD)检测反射光斑的相对位置,实时测定动态基座航向角,为避免基座晃动的影响,提出了角锥棱镜反射测量方法并设计了整套光路,所需元件少,结构简单,光路调谐简便,适合空中作业。根据预估参数搭建了实验系统,对面阵CCD传感器的检测信号进行阈值分割处理后,采用重心亚像素检测方法,定位精度达到0.4像元大小,航向角度测量不受基座晃动影响,测量精度优于1,测量范围满足10,为应用于外场实验打下了基础。

     

    Abstract: Large range course angle measurement system of medium-to-high accuracy was studied for the course angle calibration of vehicle dynamic base. The system used two area array CCDs to identify the location of a reflected spot and realized the course angle measurement of dynamic base. To avoid the impact of base vibration, a retro-reflector was used. The system is optimized for airborne application because it is simple in structure and easy to adjust. An experimental setup was built based on the estimated parameters. After the signal detected by CCDs was processed by threshold segmentation, a center of gravity sub-pixel method was used to achieve position detection. The result shows that the accuracy of position measurement is about 0.4 pixel, the course angle is immune to the base vibration, and the accuracy of the measurement is better than 1 in the measurement range of 10.

     

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