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.
出处
《电光与控制》
北大核心
2006年第2期38-40,共3页
Electronics Optics & Control
关键词
CCD
激光自准直系统
精度
图像噪声
相关双取样
CCD
laser collimation system
precision
image noise
correlated couple sampling
