一种小波提升-DCT变换的电缆数据压缩与传输算法研究  

Research on cable data compression and transmission algorithm based on wavelet lifting wavelet-discrete cosine transform

作　　者：苏瑜蓉 顾涛 SU Yurong;GU Tao(School of Safety Engineering,North China Institute of Science and Technology,Yanjiao,065201,China;School of Computing,North China Institute of Science and Technology,Yanjiao,065201,China)

机构地区：[1]华北科技学院安全工程学院,北京东燕郊065201 [2]华北科技学院计算机学院,北京东燕郊065201

出　　处：《华北科技学院学报》2022年第2期77-82,共6页Journal of North China Institute of Science and Technology

基　　金：河北省物联网监控工程技术研究中心基金项目(3142016020);中央高校基本科研业务费专项资金基金项目(3142015024)。

摘　　要：为解决10kV电缆监测数据(电场数据)的传输与存储问题,采用二维小波提升-DCT变换压缩算法对电场数据进行压缩。将一维电场数据构建为128×128大小的矩阵,对该矩阵进行一次haar小波提升变换,得到4个64×64的系数矩阵;采用二维DCT变换对4个系数矩阵进行处理,通过筛选矩阵,将筛选后的系数使用一维小波变换进行压缩,将压缩数据通过CAN总线进行传输并存入数据库。设定压缩比为16.603:1,使原始数据与解压缩后数据误差能够满足电场技术指标误差不超过±10%要求的同时将压缩比最大化,进而缓解海量电场数据传输与存储压力。In order to solve the problem of transmission and storage of 10kV cable monitoring data(electric field data),two-dimensional wavelet lifting-discrete cosine transform compression algorithm is used to compress the electric field data.The one-dimensional electric field data is constructed as 128×128 matrix,and a haar wavelet lifting transform is performed on the matrix to obtain four 64×64 coefficient matrices.Four coefficient matrices are processed by two-dimensional discrete cosine transform.Through the screening matrix,the screened coefficients are compressed by one-dimensional wavelet transform,and the compressed data is transmitted through CAN bus and stored in the database.The compression ratio is set to 16.603:1,so that the error between the original data and the decompressed data can meet the requirements that the error of the electric field technical index does not exceed±10%,while maximizing the compression ratio,so as to alleviate the pressure of massive electric field data transmission and storage.

关 键 词：电场 数据压缩 小波提升 DCT变换 CAN总线 

分 类 号：TM76[电气工程—电力系统及自动化]