提高CCD激光自准直测量系统精度的一种方法  

A method for improving measurement precision of CCD laser collimation system

作　　者：张东梅[1] 尚春民[2] 乔彦峰 

机构地区：[1]长春光学精密机械与物理研究所 [2]长春理工大学,吉林长春130022

出　　处：《电光与控制》2006年第2期38-40,共3页Electronics Optics & Control

摘　　要：为了提高经纬仪的测量和跟踪精度,采用了一种CCD激光自准直系统对光电经纬仪车载平台变形进行实时测量;对测量系统的精度进行了分析,其精度很大程度上取决于CCD图像传感器输出信号的精度;研究了影响CCD精度的各种因素,并对CCD图像进行消噪处理,结果表明CCD图像的质量明显提高,从而提高了CCD激光自准直系统的测量精度。When a theodolite is working at a mobile station, tracking error may be caused by the deformation of the vehicle platform. In order to improve the measuring and tracking precision of photoelectric theodolite, a set of CCD laser collimation system is used for measuring the deformation of the platform in real time. Analysis to precision of the measuring system shows that the precision is dependent greatly on that of CCD image sensor output signal. The factors that have effect on CCD precision are studied, and noise immunization is carried out for CCD images. As a result, the quality of CCD image is improved, thus the measurement precision of CCD laser collimation system is improved. The deformation of the platform can be measured accurately, which can provide feedback data for real - time compensation, and a possibility for improving the tracking precision of the theodolite.

关 键 词：CCD 激光自准直系统 精度 图像噪声 相关双取样 

分 类 号：V24[航空宇航科学与技术—飞行器设计] TN386.5[电子电信—物理电子学]