多通道同步数据采集及压缩系统

Multi-channel synchronous data acquisition and compression system

介绍一种基于CPLD和DSP的多通道同步数据采集及压缩系统。该系统采用复杂可编程逻辑器件(CPLD)和数字信号处理器(DSP)的体系结构,利用CPLD实现数据采集、缓冲、预处理,并协调系统各部分工作,利用DSP无损压缩采集数据,通过RS-422总线将压缩后的数据上传遥测系统;并对无损压缩的相关算法进行比较,最终采用算术编码(ARC)压缩算法,结论证实该系统切实可行,各项指标满足系统要求。该系统可应用于遥测多路噪声数据。

Multi-channel synchronous data acquisition and compression system based on DSP and CPLD is introduced.The method adopts an overall architecture of the complex programmable logic device （CPLD）and the digital signal processor （DSP）. CPLD realizes acquisition, storage ,preprocessing functions of data, and coordinates all the parts in the system. DSP completes lossless compression.The compressed data are transmitted to the telemetry system by the RS-422 bus.The relevant algorithms of lossless compression are compared,and used the arithmetic coding （ARC）to carry on the corresponding compression. The conclusion confirms that this plan is practical and feasible, each target satisfies the system request, And the system is applied in telemetry multi-channel noise data.