一种遥测数据实时采集压缩系统的实现

Design of a Real-time Telemetry Data Acquisition Compression System

设计了一种对遥测大容量速变数据的实时压缩采集方案,通过采用改善无损压缩算法的压缩比、压缩和解压速度以及算法复杂度等多个数据压缩性能,提出了综合性能较好的LZW编码作为数据压缩的核心算法并通过软件仿真确认其效果和压缩算法的执行速度;利用主控芯片FPGA完成对压缩数据的高精度采集,对研制的数据采集压缩系统进行整体测试,测试结果表明,该系统完成了6路速变参数的实时采集与压缩,压缩比达到1.8∶1以上,各项指标满足了设计要求。

This paper introduces a design of variable-- speed large-- capacity telemetry data acquisition scheme. By using a lossless compression al gorithm to improve the compression ratio, the plurality of data compression, decompression speed and compression performance of the algorithm com plexity, etc. It presented a data compression core algorithm of LZW （Lempel--Ziv--Welch） and simulated the results of its execution speed and com pression algorithms through software. Using master chip FPGA completed the high--precision data acquisition compression and acquiried the systems overall compression test. After a lot of tests, it showed that the scheme completed a six--way real--time acquisition and compression speed varying parameters, the compression ratio is above 1.8： 1 and the indicators meet the design requirements.