卫星激光测距系统中激光指向偏差测量的图像处理方法研究  

Research on image processing methods for measuring laser pointing deviation in satellite laser ranging system

作　　者：王媛媛[1] 刘艳红[1] 胡元航[1] 张文娟[1] 王连明[1] 

机构地区：[1]东北师范大学应用电子技术研究所,吉林长春130024

出　　处：《东北师大学报（自然科学版）》2012年第4期66-70,共5页Journal of Northeast Normal University(Natural Science Edition)

基　　金：吉林省科技发展重点支持项目(20100458)

摘　　要：卫星激光测距系统中激光指向子系统与卫星观测子系统同步运行,从而保证激光束与卫星在同一视场,但不能保证激光束精确指向卫星.针对这一问题,需要使用图像处理技术,计算出激光束的光尖与卫星参考位置的偏差,从而调节激光束的发射角,使激光精确指向卫星.通过采用圆形平均滤波法进行图像预处理,提出矢量边界扫描法,在检测出激光图像边缘信息后,利用直线拟合获得了激光束的射入方向,最后计算出偏差.该方法应用于实际系统取得了较好的效果.Laser pointing subsystem and satellite observing subsystem are synchronous in satellite laser ranging system to make sure that laser beam is in the same field of view with the satellite.While the system can not guarantee that the laser beam points to the satellite accurately.To solve this problem,image processing techniques are required to calculate the deviation between the tip of laser beam and the reference position of satellite,by which the emission angle of the laser beam can be adjusted automatically to point to the satellite accurately.Circular average filter method is adopted for image pre-processing and a vector boundary-scan method is proposed for detecting the edge information of laser images.After the incident direction of laser beam is obtained by straight line fitting,the deviation can be calculated out.Better results have been achieved by the method in actual systems.

关 键 词：激光测距 图像处理 指向偏差 矢量边界扫描 直线拟合 

分 类 号：TP751.1[自动化与计算机技术—检测技术与自动化装置]