摘要
采用数据压缩技术可有效减少船舶电力监控系统监测的数据量,提高现场总线网的通信效率。根据不同压缩方法的特点压缩船舶通信中不同类型的数据,其中对开关量和电力主干网等数据采用10进制霍夫曼编码的压缩方式压缩;对包含多测点的模拟量数据采用基于旋转门算法的监控数据的压缩方式压缩;对电能质量等数据采用小波变换的压缩方式压缩。仿真结果表明,采用该方案能实现对数据的有效压缩,节约网络宽带。
The number of monitoring devices are growing as the development of intelligent ship,so is the volume of monitoring data.Data compression becomes necessary measure to improve communication efficiency.Appropriate data compression algorithms are selected according to the types of data.On-off type data and the information of power backbone are compressed by decimal Huffman coding,and the analog data by a SDT(Swinging Door Trending)algorithm adapted to ship monitoring data.The power quality data are compressed by wavelet compression algorithm.Simulations show that combining use of those algorithms can effectively reduce the volume of data.
作者
王永臻
孙亮清
WANG Yongzhen;SUN Liangqing(Warship Automatic System Division, Shanghai Ship and Shipping Research Institute, Shanghai 200135, China)
出处
《上海船舶运输科学研究所学报》
2020年第1期55-60,共6页
Journal of Shanghai Ship and Shipping Research Institute
关键词
数据压缩
无损压缩
旋转门
小波变换
data compression
lossless compression
SDT
wavelet transform
