摘要
针对导弹检测系统的训练和计量,采用CPLD技术设计了某型导弹电视测角仪视频信号模拟系统;介绍了测角仪的视频显示方式和模拟信号产生原理,并给出了CPLD主要的内部逻辑电路和VHDL语言描述;将视频信号分解为同步信号、固定图像和可控实心圆,以行计数器和列计数器构成图像的时间基准,通过对行、列计数器的编码实现同步信号和固定图像,通过对可逆计数器及行、列计数器的运算实现可控实心圆,并对可逆计数器的数据进行编码构成变焦数据,最终精确地实现了测角仪视频信号及其变焦数据输出的模拟。
For training and metrology of a missile test system, a video signal simulation system of TV goniometer of an anti--tank missile are designed by application of CPLD technology. Display contents of the goniometer and generation principle of the simulation signals are introduced, and main internal logic circuits and VHDL descriptions of the CPLD are gone into particulars. The video signals are decompsed into synchronizations, fixed images and controllable solid circle. Taking a line counter and a row counter as time base of the image, the synchronizations and the fixed images are both implemented by encoding the counters, the solid circle is realized by operating the two counters and an additional reversible counter, which is encoded to generate variational optic focus data corresponding to the solid circle. As a result, precise simulation of the video signals and focus data output are realized.
出处
《计算机测量与控制》
CSCD
北大核心
2012年第4期1023-1025,共3页
Computer Measurement &Control
