摘要
针对不同的继电保护装置人机界面系统,提出了基于点阵图与矢量图的两种图像传输控制策略。研究了行程长度编码,LZW编码和小波变换3种图像压缩方法,并对它们进行了仿真比较。给出了图像采集、压缩、传输、还原的具体方法,对液晶屏和按键两种输入设备,设计了屏幕图像的控制方法。提出的方案已成功应用于部分继电保护装置和监控系统,取得了良好的效果。
This paper proposes two kinds of image transportation and control schemes based on bitmap and vector diagram for different relay protection device HMI. RLE,LZW and wavelet transformation are researched and com-pared through numerical simulation for bitmap compression. In the practical project,the methods of image acquisi-tion,compression,transportation and restoration are introduced in detail. The methods of controlling remote screen image based on touch panel and keypad are proposed to enable the device to response quickly to the command from remote client. The scheme proposed has been used and has achieved good effects.
出处
《电力科学与工程》
2014年第2期29-34,共6页
Electric Power Science and Engineering
