时频综合的化工数据压缩方法及应用研究  

Time-frequency integrated chemical data compression method and application

作　　者：赵标[1] 王海清[1] 李平[1] 

机构地区：[1]工业控制技术研究所,浙江大学工业控制技术国家重点实验室,浙江杭州310027

出　　处：《计算机与应用化学》2006年第2期107-112,共6页Computers and Applied Chemistry

基　　金：国家自然科学基金(20206028;20576116)德国洪堡基金会资助项目

摘　　要：集散控制系统和现代测控仪表的大量使用,使得化工生产过程产生了大量数据。而企业信息化和网络控制技术均对过程数据的管理、存储和传输等性能提出了新的要求。应用过程数据压缩技术对化工过程数据进行预处理,不仅可以节约存储空间,而且可以降低数据流量,避免出现网络拥塞,对保障现场总线和网络控制技术的成功实施具有重要意义。本文以典型的Tennessee Eastman(TE)生产过程为对象,提出一种基于工业应用的小波变换在线数据压缩测量,可以同时兼顾过程数据的时域和频域特征信息。对TE过程中的汽提塔压力信号的仿真压缩结果验证了本算法的有效性。With wide applications of DCS and modem measurement instruments, great amount of process data of chemical industry are generated. New requirements on the management, storage and transferring of the process data are raised by ERP and network controlling techniques. The application of online process data compression technique on the preproeessing of chemical engineering data can save plentiful storage space, reduce the size of the data stream, and avoid the blockage in the network. It is important for the successful implementations of field bus and network control. Considering a benchmark production process of Tennessee Eastman（ TE）, a new algorithm of online data compression based on wavelet transforms is given. Both characteristics of the data in the time domain and in the frequency domain are taken into account in the algorithm. A case study is presented to prove the efficiency of the algorithm by compressing the simulating data of the signal of stripper pressure in TE process.

关 键 词：过程数据压缩 TE过程 汽提塔压力 小波变换 多尺度树 

分 类 号：TQ021.8[化学工程] TP206[自动化与计算机技术—检测技术与自动化装置]