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分析和研究了CCD摄影测量算法的精确定位技术,建立了4个信标点空间位置坐标的数学模型,并推导出计算公式,该算法的特点是计算精度高,可实时计算空间目标的坐标位置,从而对空间目标精确定位,在航天、航空技术上有重要的用途。设计了一台直升机着降与回收的光电导引系统,利用2台红外CCD对在直升机两侧机身被半导体激光器照明的4个信标成像,通过对图像的处理和目标识别,提取出信标的位置和恣态信息。使用双摄影测量法模型实时计算出直升机相对于着降点的坐标。使用高性能的DSP系统,实时检测和跟踪双通道图像信号并显示出实验结果。模拟实验结果表明,在8～13m距离内,光电引导系统的距离测量精度达到±5cm,而角度测量精度达到±3°。
The precise location technology of CCD photogrammetry algorithm is analyzed and studied. The mathematical model of the position coordinate of four beacon points is established and the formula is derived. The algorithm is characterized by high computational accuracy, real-time calculation of the coordinate position of the space object, Thus precise positioning of space targets, aerospace, aerospace technology has an important purpose. A photoconductive system for helicopter landing and recovery was designed. Two infrared CCDs were used to image four beacons illuminated by semiconductor lasers on both sides of the helicopter. Through the image processing and target identification, a letter was extracted The subject of the location and information. Using double photogrammetric models, the coordinates of the helicopter with respect to the landing point are calculated in real time. Using high-performance DSP system, real-time detection and tracking of dual-channel image signal and show the experimental results. Simulation results show that in the distance of 8 ~ 13m, the distance measurement accuracy of the photoelectric guidance system reaches ± 5cm, and the angle measurement accuracy reaches ± 3 °.