基于DSP的高速数据采集器设计  

Design of High-speed Data Acquisition Device Based on DSP

作　　者：关守平 尤富强[1] 高鑫[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004

出　　处：《控制工程》2013年第6期1032-1036,1041,共6页Control Engineering of China

基　　金：国家自然科学基金资助项目(60974070);沈阳市科技基金资助项目(F11-264-1-27)

摘　　要：为了实现全自动X射线角分类机测量的高速度与高精度,介绍了一种基于DSP的高速数据采集器的构成及技术实现,包括X射线衍射信号调理,数据高速采集处理以及USB高速通信三部分,信号调理板对X光衍射信号进行放大和滤波处理,DSP主板负责对调理后的模拟信号进行高速数据采集和处理,对光电编码器信号进行采集,以及将采集数据通过USB接口实时传输给上位计算机。设计了数据采集器软件,在DSP主板中嵌入了离散FIR算法对采集数据进行数字滤波,提高了整个系统的测量精度。实验测试结果表明,该高速数据采集器结构灵活,性价比高,抗干扰能力强,数据采集、处理与通信能力等各项指标均已达到了设计时的要求,具有广泛的实用性。In order to satisfy the high speed and high accuracy request of the Xray angle sorter, highspeed data acquisition system based on the DSP has been developed which includes Xray diffraction signal recuperation module, highspeed data sampling and process module and highspeed USB communication module. Signal recuperation module amplifying and filtering the Xray diffraction signal, the DSP board carrying out higilspeed data acquisition and processing for the analog signal, acquisition the signal of photoelectric encode, and transmitting the collected data to the host computer through USB interface. The system application software design is also analyzed in detailed. Furthermore, in order to get the high precision, The separated the FIR algorithm has been embedded to the DSP procedure for filtering data. The exerimental results show the feasibility of the designed method.

关 键 词：X射线角分类机 数据采集器 DSP FIR滤波 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]