远程故障诊断系统通信数据压缩技术研究与验证  

Research and Verification on Data Compression Technology of Remote Fault Diagnosis System

作　　者：张隽[1] 翟正军[1] 姜红梅[1] 韩玮[1] 

机构地区：[1]西北工业大学计算机学院,陕西西安710072

出　　处：《计算机测量与控制》2009年第1期49-52,共4页Computer Measurement &Control

基　　金：国家"十一五"国防基础预研究资助项目(B2720060300)

摘　　要：根据远程故障诊断的测试数据的网络传输特点,在详细分析和比较了多种数据压缩算法的基础上,针对LZW算法字典列表长度有限、查找时间长等问题,利用加入了动态延伸列表长度、根据压缩比例调整已有的字典内容和哈希函数查找等方法,对LZW算法提出了改进措施;同时,引入MPEG帧间压缩的思想,设计了一种新的"周期性差值压缩方法",将改进的LZW数据压缩算法与"周期性差值压缩方法"相结合,构成了更有效的级联数据压缩方法,有效地提高了数据压缩比率和效率,并且该算法的处理速度能够满足远程故障诊断系统对通信的要求。Aiming to the characteristics of Remote Diagnosis for the test data of the network transmission, this paper improve the LZW algorithm via analyzing and comparing a variety of data compression algorithm on the basis of LZW algorithm for the limited length of the dic- tionary list, a long time lookup. It introduces a MPEG inter--frame compression, and designs a new method ＂cyclical margin compression method＂. And it combined the improved LZW data compression algorithm and the ＂cyclical margin compression method＂, constitutes a more effective cascade data compression method, effectively improves data compression ratio and efficiency. It also improves the system of the large number of test data compression efficiency.

关 键 词：远程故障诊断系统 数据无损压缩 级联数据压缩 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]