直升机摄影测量算法与激光监测引导实验

【作者】 王伟；

【导师】 朱大勇；

【作者基本信息】 电子科技大学 ， 光学工程， 2001， 硕士

【摘要】 本文评述了直升飞机的常规引导和着降方法及国内外的着降与引导装置的最新发展情况。对直升机着舰过程中精确定位的摄影测量算法和点目标图像处理算法进行了研究，建立了用四个信标点测量直升飞机挂钩位置的模型，推导了由信标像点的坐标计算挂钩位置的算法。对在摄影测量算法中影响测量精度和视场角的因数进行了系统的分析，理论计算表明合适的选择CCD摄象机的参数可以使直升飞机的定位精度达到10个厘米以下。对点目标进行了高通滤波及门限检测模拟，结果表明经过高通滤波和门限检测能较好的提取目标像元。 本文对直升飞机引导过程中扫描激光算法进行了系统的分析和研究，首次提出了四反射镜测量距离与飞机引导，并以实验室现有的条件设计了一套扫描激光测量角反射镜返回信号时间的原理性实验系统，为了实现数据的自动测量，完成了通过单片机和计算机的串行接口进行双机通信的实际电路研制和软件的编写，通过测量角反射镜返回的光信号时间差来模拟飞机的距离和方位角，得到了满意的结果，说明我们的方法是正确的。为今后研究实际系统提供了重要的依据，具有重要的参考价值。更多还原

【Abstract】 The common guiding and landing methods of helicopters is discussed in this dissertation. We studied the CCD-photogrammetry that will be used in the landing of helicopter to measure the precise position. We made the model of using the four signal dot to measure the position of the probe of the helicopter. The factors which will affect on the maxim angle and error of CCD-photogrammetry is discussed.The outcome of computing show that if we select appropriate paraments of CCD we can control the error of measure in five centimeters.The highpass filter we will be used to process the picture is emulatored on the computer. The outcome has shown that the method of highpass filter can pick up the signal well. The scaning laser is use to measure the range of helicopter and guid it returning miles away. The interface of singlechip and computer is designed to measure data automatically.This method is brought forward in the first time. We establish a suit of slass system emulating experiment which emulated the signal that reflected from the angle-reflecting mirror.The experiment supply the important base for the further real system that we will build and it has important value.更多还原