一种炮口扰动三维参数的光学测量方法  

Optical measurement method for three-dimensional parameters of muzzle disturbance

作　　者：刘鹏祖 张思琪 游江 回丙伟[3] LIU Pengzu;ZHANG Siqi;YOU Jiang;HUI Bingwei(63870 Troops of The Chinese People’s Liberation Army,Huayin 714200,China;Xi’an Modern Control Technology Research Institute,Xi’an 710065,China;National University of Defense Technology,Changsha 410073,China)

机构地区：[1]中国人民解放军63870部队,陕西华阴714200 [2]西安现代控制技术研究所,陕西西安710065 [3]国防科技大学,湖南长沙410073

出　　处：《中国测试》2020年第8期51-57,共7页China Measurement & Test

摘　　要：针对大口径火炮炮口扰动三维参数的测量问题,提出一种基于光学图像三角测量原理的炮口扰动测量方法。首先简述光学图像测量原理,而后研究基于标定板的相机标定方法,以及基于标志点区域模板的亚像素定位方法,实现相机内外参数的优化,以及标志点自动检测与定位,最后建立立体交会模型,利用最小二乘法求解出空间点三维坐标。此外,分析影响测量精度因素,为光学三角测量提供参考。实验结果表明:该方法能够准确获取炮口扰动规律,空间定位精度及位移测量精度优于0.5 mm,满足炮口扰动工程测试需求并为武器系统设计验证提供数据支撑。Aiming at the measurement problem of the three-dimensional parameters of the muzzle disturbance on large-caliber artillery,the method based on optical image triangulation is proposed.Firstly,the principle of optical image measurement is described.Then the camera calibration method based on calibration plate and subpixel positioning method based on marker area template is studied,which realized the optimization of the camera's internal and external parameters and the automatic detection and location of landmarks.Finally,the three-dimensional intersection model is built and the three-dimensional coordinates of space points are solved by least square method.In addition,the factors affecting the measurement accuracy are analyzed,which provides a reference for optical triangulation.The experiment result shows that:the method can accurately obtain the muzzle disturbance law,and spatial positioning accuracy and displacement measurement accuracy are better than 0.5 mm,which meets the muzzle disturbance engineering test requirement,and provides data support for the weapon system design and verification.

关 键 词：炮口扰动 高速相机 摄影测量 三角交会 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]