摘要
准确的实现输出图像信号的放大及模数转换是CCD图像数据获取的关键;文章在同步采样原理的基础上提出了一种适合线阵CCD的高精度同步采样方法;方法主要包括模拟信号的放大、峰值保持和同步采样。研究表明,采用峰值保持后的采集,显著改善了图像数据的稳定性。文中介绍了该方法的系统设计及实现,并用条码对系统性能进行了测试分析。
The picture signal amplification and analog to digital conversion are the critical points of CCD data acquisition system; Based on the simple synchronous sampling technique, a high-precision synchronous sampling method is presented. The method mainly includes analog signal amplifying, peak holding and synchronous sampling. And the experiment shows the improvement of picture data stability. As a simple electronic system, design and realization of this method are introduced in detail; and system performance testing is done on the bar code.
出处
《电子测量技术》
2008年第6期125-128,共4页
Electronic Measurement Technology
