可用于双目标同时着靶的单线阵相机坐标测量系统  

Measuring system for coordinates of two bullets impacting simultaneously based on single linear array camera

作　　者：董涛[1,2] 华灯鑫[1] 李言[1] 倪晋平[2] 

机构地区：[1]西安理工大学机械与精密仪器工程学院,陕西西安710048 [2]西安工业大学光电工程学院,陕西西安710032

出　　处：《光学技术》2014年第6期481-485,共5页Optical Technique

基　　金：国家自然科学基金项目(60972005)

摘　　要：提出了一种基于单线阵CCD相机的坐标测量系统。将相机的探测光幕面和激光器的光幕面设置在同一个平面内,投影板被激光器照亮,为相机提供具有一定亮度的探测背景。当两发弹丸同时穿越由激光器和线阵相机共同组成的探测光幕面时,会挡住激光器投射在投影板上的部分光线,并在投影板上留下两个弹丸的投影。相机采集到两个投影的影像和两发弹丸自身的影像,并通过计算机图像处理对两种影像加以区分和位置识别,得到弹丸在CCD器件上的成像点和弹丸在投影板上的投影点中心的位置坐标,然后再根据激光器发光点和探测镜头主点位置等系统参数,最终便可求解得到两发弹丸的着靶坐标。结果表明,所提出的测量原理是可行的,测量误差在靶面面积为0.5m×0.5m时约为1mm,如果进一步增大测量靶面面积,则可以满足现有靶场的测试需求。A coordinates measuring system by using a single linear array CCD camera is presented.The detection light screen of the CCD camera and the laser screen are placed in the same plane,and the projection board can act as a detecting background for camera after the board is lighten by the laser.When two bullets are passing through the overlapped screen at the same time,they block out the some laser lights on the projection board with shadows of the two bullets left on.The shadows and images of the two bullets are acquired by the CCD camera,and further processed by means of computer such that the shadows and images can be differentiated to obtain the coordinates,which are projection point left on the board and centers of image on the CCD of the bullets respectively.The bullet coordinates are obtained on the basis of the system parameters of laser luminous point and principal point of camera lens.The experiment is performed to state that the feasibility of the measuring principle,and the measuring error is 1mm approximately with the screen of 0.5m×0.5m;the requirement for the test in current firing range can be met on the condition that the measuring screen is enlarged further.

关 键 词：光学测量 高速线阵CCD相机 弹丸 着靶坐标 立靶 

分 类 号：TJ012.3[兵器科学与技术—兵器发射理论与技术]