摘要
介绍了利用数字高速摄影机组网测量飞机着陆道面段运动参数的方法。采用凝视测量方法,通过对飞机着陆点位置的统计,正确选取测量区域,合理布设测量站点;并利用多台摄影机联合组网等措施扩展测量范围,解决了由于飞行员难以把握着陆点位置而失去对关键点的测量问题。同时,应用摄影测量原理,通过对摄影机的标校,获得了摄影机的参数;利用图像的数字微分纠正原理,对所摄图像进行修正和重建,得到摄影机的正摄影像,进而利用图像处理方法对起落架机轮及机身测量标志进行基于亚像素的跟踪判读;对判读数据进行处理,得到了飞机着陆道面段的运动轨迹、速度等数据。结合真实飞行试验对测量结果进行了分析,数据结论准确。
The technique to measure the motion parameters of aircraft in its landing process by using high speed digital camera is presented. Proper measurement area was determined and appropriate measuring spots were located by analyzing the landing position statistics. Several cameras were used to form a network for expanding the measuring range, thus the pilot can judge the landing position properly. The elevational images could be obtained by resolving camera parameters and correcting digital images with numerical differential. Throughout image processing, the marks on the undercarriage wheels and airframe were high-accurately tracked and identified based on sub-pixel. The trace, velocity and other parameters of the undercarriage were gained by data processing. We made analysis to the measurement result in flight tests, which showed the correctness of the measurement.
出处
《电光与控制》
北大核心
2009年第2期67-71,共5页
Electronics Optics & Control
关键词
摄影测量
非接触
亚像素
飞行试验
着陆
运动参数测量
photogrammetric survey
non-contact
measurement sub-pixel
flight test
landing
motion parameter
